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1755 lines
60 KiB
Java
1755 lines
60 KiB
Java
/* SwingUtilities.java --
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Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing;
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import java.applet.Applet;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.FontMetrics;
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import java.awt.Frame;
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import java.awt.Graphics;
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import java.awt.Insets;
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import java.awt.KeyboardFocusManager;
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import java.awt.Point;
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import java.awt.Rectangle;
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import java.awt.Shape;
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import java.awt.Window;
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import java.awt.event.ActionEvent;
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import java.awt.event.InputEvent;
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import java.awt.event.KeyEvent;
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import java.awt.event.MouseEvent;
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import java.lang.reflect.InvocationTargetException;
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import javax.accessibility.Accessible;
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import javax.accessibility.AccessibleStateSet;
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import javax.swing.plaf.ActionMapUIResource;
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import javax.swing.plaf.InputMapUIResource;
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import javax.swing.plaf.basic.BasicHTML;
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import javax.swing.text.View;
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/**
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* A number of static utility functions which are
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* useful when drawing swing components, dispatching events, or calculating
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* regions which need painting.
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*
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* @author Graydon Hoare (graydon@redhat.com)
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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*/
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public class SwingUtilities
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implements SwingConstants
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{
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/**
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* This frame should be used as parent for JWindow or JDialog
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* that doesn't an owner
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*/
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private static OwnerFrame ownerFrame;
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private SwingUtilities()
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{
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// Do nothing.
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}
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/**
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* Calculates the portion of the component's bounds which is inside the
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* component's border insets. This area is usually the area a component
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* should confine its painting to. The coordinates are returned in terms
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* of the <em>component's</em> coordinate system, where (0,0) is the
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* upper left corner of the component's bounds.
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*
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* @param c the component to measure the bounds of (if <code>null</code>,
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* this method returns <code>null</code>).
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* @param r a carrier to store the return value in (if <code>null</code>, a
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* new <code>Rectangle</code> instance is created).
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*
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* @return The calculated area inside the component and its border insets.
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*/
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public static Rectangle calculateInnerArea(JComponent c, Rectangle r)
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{
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if (c == null)
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return null;
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r = c.getBounds(r);
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Insets i = c.getInsets();
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r.x = i.left;
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r.width = r.width - i.left - i.right;
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r.y = i.top;
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r.height = r.height - i.top - i.bottom;
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return r;
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}
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/**
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* Returns the focus owner or <code>null</code> if <code>comp</code> is not
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* the focus owner or a parent of it.
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*
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* @param comp the focus owner or a parent of it
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*
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* @return the focus owner, or <code>null</code>
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*
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* @deprecated 1.4 Replaced by
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* <code>KeyboardFocusManager.getFocusOwner()</code>.
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*/
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public static Component findFocusOwner(Component comp)
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{
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// Get real focus owner.
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Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager()
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.getFocusOwner();
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// Check if comp is the focus owner or a parent of it.
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Component tmp = focusOwner;
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while (tmp != null)
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{
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if (tmp == comp)
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return focusOwner;
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tmp = tmp.getParent();
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}
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return null;
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}
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/**
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* Returns the <code>Accessible</code> child of the specified component
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* which appears at the supplied <code>Point</code>. If there is no
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* child located at that particular pair of co-ordinates, null is returned
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* instead.
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*
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* @param c the component whose children may be found at the specified
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* point.
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* @param p the point at which to look for the existence of children
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* of the specified component.
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* @return the <code>Accessible</code> child at the point, <code>p</code>,
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* or null if there is no child at this point.
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* @see javax.accessibility.AccessibleComponent#getAccessibleAt
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*/
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public static Accessible getAccessibleAt(Component c, Point p)
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{
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return c.getAccessibleContext().getAccessibleComponent().getAccessibleAt(p);
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}
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/**
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* <p>
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* Returns the <code>Accessible</code> child of the specified component
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* that has the supplied index within the parent component. The indexing
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* of the children is zero-based, making the first child have an index of
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* 0.
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* </p>
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* <p>
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* Caution is advised when using this method, as its operation relies
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* on the behaviour of varying implementations of an abstract method.
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* For greater surety, direct use of the AWT component implementation
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* of this method is advised.
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* </p>
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*
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* @param c the component whose child should be returned.
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* @param i the index of the child within the parent component.
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* @return the <code>Accessible</code> child at index <code>i</code>
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* in the component, <code>c</code>.
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* @see javax.accessibility.AccessibleContext#getAccessibleChild
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* @see java.awt.Component.AccessibleAWTComponent#getAccessibleChild
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*/
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public static Accessible getAccessibleChild(Component c, int i)
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{
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return c.getAccessibleContext().getAccessibleChild(i);
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}
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/**
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* <p>
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* Returns the number of <code>Accessible</code> children within
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* the supplied component.
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* </p>
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* <p>
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* Caution is advised when using this method, as its operation relies
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* on the behaviour of varying implementations of an abstract method.
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* For greater surety, direct use of the AWT component implementation
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* of this method is advised.
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* </p>
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*
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* @param c the component whose children should be counted.
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* @return the number of children belonging to the component,
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* <code>c</code>.
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* @see javax.accessibility.AccessibleContext#getAccessibleChildrenCount
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* @see java.awt.Component.AccessibleAWTComponent#getAccessibleChildrenCount
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*/
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public static int getAccessibleChildrenCount(Component c)
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{
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return c.getAccessibleContext().getAccessibleChildrenCount();
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}
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/**
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* <p>
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* Returns the zero-based index of the specified component
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* within its parent. If the component doesn't have a parent,
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* -1 is returned.
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* </p>
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* <p>
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* Caution is advised when using this method, as its operation relies
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* on the behaviour of varying implementations of an abstract method.
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* For greater surety, direct use of the AWT component implementation
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* of this method is advised.
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* </p>
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*
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* @param c the component whose parental index should be found.
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* @return the index of the component within its parent, or -1
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* if the component doesn't have a parent.
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* @see javax.accessibility.AccessibleContext#getAccessibleIndexInParent
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* @see java.awt.Component.AccessibleAWTComponent#getAccessibleIndexInParent
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*/
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public static int getAccessibleIndexInParent(Component c)
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{
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return c.getAccessibleContext().getAccessibleIndexInParent();
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}
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/**
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* <p>
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* Returns a set of <code>AccessibleState</code>s, which represent
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* the state of the supplied component.
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* </p>
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* <p>
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* Caution is advised when using this method, as its operation relies
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* on the behaviour of varying implementations of an abstract method.
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* For greater surety, direct use of the AWT component implementation
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* of this method is advised.
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* </p>
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*
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* @param c the component whose accessible state should be retrieved.
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* @return a set of <code>AccessibleState</code> objects, which represent
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* the state of the supplied component.
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* @see javax.accessibility.AccessibleContext#getAccessibleStateSet
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* @see java.awt.Component.AccessibleAWTComponent#getAccessibleStateSet
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*/
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public static AccessibleStateSet getAccessibleStateSet(Component c)
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{
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return c.getAccessibleContext().getAccessibleStateSet();
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}
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/**
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* Calculates the bounds of a component in the component's own coordinate
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* space. The result has the same height and width as the component's
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* bounds, but its location is set to (0,0).
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*
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* @param aComponent The component to measure
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*
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* @return The component's bounds in its local coordinate space
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*/
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public static Rectangle getLocalBounds(Component aComponent)
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{
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Rectangle bounds = aComponent.getBounds();
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return new Rectangle(0, 0, bounds.width, bounds.height);
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}
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/**
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* If <code>comp</code> is a RootPaneContainer, return its JRootPane.
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* Otherwise call <code>getAncestorOfClass(JRootPane.class, a)</code>.
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*
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* @param comp The component to get the JRootPane of
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*
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* @return a suitable JRootPane for <code>comp</code>, or <code>null</code>
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*
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* @see javax.swing.RootPaneContainer#getRootPane
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* @see #getAncestorOfClass
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*/
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public static JRootPane getRootPane(Component comp)
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{
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if (comp instanceof RootPaneContainer)
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return ((RootPaneContainer)comp).getRootPane();
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else
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return (JRootPane) getAncestorOfClass(JRootPane.class, comp);
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}
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/**
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* Returns the least ancestor of <code>comp</code> which has the
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* specified name.
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*
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* @param name The name to search for
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* @param comp The component to search the ancestors of
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*
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* @return The nearest ancestor of <code>comp</code> with the given
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* name, or <code>null</code> if no such ancestor exists
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*
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* @see java.awt.Component#getName
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* @see #getAncestorOfClass
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*/
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public static Container getAncestorNamed(String name, Component comp)
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{
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while (comp != null && (comp.getName() != name))
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comp = comp.getParent();
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return (Container) comp;
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}
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/**
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* Returns the least ancestor of <code>comp</code> which is an instance
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* of the specified class.
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*
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* @param c The class to search for
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* @param comp The component to search the ancestors of
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*
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* @return The nearest ancestor of <code>comp</code> which is an instance
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* of the given class, or <code>null</code> if no such ancestor exists
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*
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* @see #getAncestorOfClass
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* @see #windowForComponent
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*/
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public static Container getAncestorOfClass(Class<?> c, Component comp)
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{
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while (comp != null && (! c.isInstance(comp)))
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comp = comp.getParent();
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return (Container) comp;
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}
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/**
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* Returns the first ancestor of <code>comp</code> that is a {@link Window}
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* or <code>null</code> if <code>comp</code> is not contained in a
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* {@link Window}.
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*
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* This is equivalent to calling
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* <code>getAncestorOfClass(Window, comp)</code> or
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* <code>windowForComponent(comp)</code>.
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*
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* @param comp the component for which we are searching the ancestor Window
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*
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* @return the first ancestor Window of <code>comp</code> or
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* <code>null</code> if <code>comp</code> is not contained in a Window
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*/
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public static Window getWindowAncestor(Component comp)
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{
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return (Window) getAncestorOfClass(Window.class, comp);
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}
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/**
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* Equivalent to calling <code>getAncestorOfClass(Window, comp)</code>.
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*
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* @param comp The component to search for an ancestor window
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*
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* @return An ancestral window, or <code>null</code> if none exists
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*/
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public static Window windowForComponent(Component comp)
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{
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return (Window) getAncestorOfClass(Window.class, comp);
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}
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/**
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* Returns the "root" of the component tree containint <code>comp</code>
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* The root is defined as either the <em>least</em> ancestor of
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* <code>comp</code> which is a {@link Window}, or the <em>greatest</em>
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* ancestor of <code>comp</code> which is a {@link Applet} if no {@link
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* Window} ancestors are found.
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*
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* @param comp The component to search for a root
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*
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* @return The root of the component's tree, or <code>null</code>
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*/
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public static Component getRoot(Component comp)
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{
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Applet app = null;
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Window win = null;
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while (comp != null)
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{
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if (win == null && comp instanceof Window)
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win = (Window) comp;
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else if (comp instanceof Applet)
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app = (Applet) comp;
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comp = comp.getParent();
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}
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if (win != null)
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return win;
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return app;
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}
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/**
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* Return true if a descends from b, in other words if b is an ancestor of a.
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*
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* @param a The child to search the ancestry of
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* @param b The potential ancestor to search for
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* @return true if a is a descendent of b, false otherwise
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*/
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public static boolean isDescendingFrom(Component a, Component b)
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{
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while (true)
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{
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if (a == null || b == null)
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return false;
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if (a == b)
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return true;
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a = a.getParent();
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}
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}
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/**
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* Returns the deepest descendent of parent which is both visible and
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* contains the point <code>(x,y)</code>. Returns parent when either
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* parent is not a container, or has no children which contain
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* <code>(x,y)</code>. Returns <code>null</code> when either
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* <code>(x,y)</code> is outside the bounds of parent, or parent is
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* <code>null</code>.
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*
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* @param parent The component to search the descendents of
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* @param x Horizontal coordinate to search for
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* @param y Vertical coordinate to search for
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*
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* @return A component containing <code>(x,y)</code>, or
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* <code>null</code>
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*
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* @see java.awt.Container#findComponentAt(int, int)
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*/
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public static Component getDeepestComponentAt(Component parent, int x, int y)
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{
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if (parent == null || (! parent.contains(x, y)))
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return null;
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if (! (parent instanceof Container))
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return parent;
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Container c = (Container) parent;
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return c.findComponentAt(x, y);
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}
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/**
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* Converts a point from a component's local coordinate space to "screen"
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* coordinates (such as the coordinate space mouse events are delivered
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* in). This operation is equivalent to translating the point by the
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* location of the component (which is the origin of its coordinate
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* space).
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*
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* @param p The point to convert
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* @param c The component which the point is expressed in terms of
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*
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* @see #convertPointFromScreen
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*/
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public static void convertPointToScreen(Point p, Component c)
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{
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Point c0 = c.getLocationOnScreen();
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p.translate(c0.x, c0.y);
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}
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/**
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* Converts a point from "screen" coordinates (such as the coordinate
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* space mouse events are delivered in) to a component's local coordinate
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* space. This operation is equivalent to translating the point by the
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* negation of the component's location (which is the origin of its
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* coordinate space).
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*
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* @param p The point to convert
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* @param c The component which the point should be expressed in terms of
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*/
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public static void convertPointFromScreen(Point p, Component c)
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{
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Point c0 = c.getLocationOnScreen();
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p.translate(-c0.x, -c0.y);
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}
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/**
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* Converts a point <code>(x,y)</code> from the coordinate space of one
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* component to another. This is equivalent to converting the point from
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* <code>source</code> space to screen space, then back from screen space
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* to <code>destination</code> space. If exactly one of the two
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* Components is <code>null</code>, it is taken to refer to the root
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* ancestor of the other component. If both are <code>null</code>, no
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* transformation is done.
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*
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* @param source The component which the point is expressed in terms of
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* @param x Horizontal coordinate of point to transform
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* @param y Vertical coordinate of point to transform
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* @param destination The component which the return value will be
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* expressed in terms of
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*
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* @return The point <code>(x,y)</code> converted from the coordinate space of the
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* source component to the coordinate space of the destination component
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*
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* @see #convertPointToScreen
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* @see #convertPointFromScreen
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* @see #convertRectangle
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* @see #getRoot
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*/
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public static Point convertPoint(Component source, int x, int y,
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Component destination)
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{
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Point pt = new Point(x, y);
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if (source == null && destination == null)
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return pt;
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if (source == null)
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source = getRoot(destination);
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if (destination == null)
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destination = getRoot(source);
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|
if (source.isShowing() && destination.isShowing())
|
|
{
|
|
convertPointToScreen(pt, source);
|
|
convertPointFromScreen(pt, destination);
|
|
}
|
|
|
|
return pt;
|
|
}
|
|
|
|
public static Point convertPoint(Component source, Point aPoint, Component destination)
|
|
{
|
|
return convertPoint(source, aPoint.x, aPoint.y, destination);
|
|
}
|
|
|
|
/**
|
|
* Converts a rectangle from the coordinate space of one component to
|
|
* another. This is equivalent to converting the rectangle from
|
|
* <code>source</code> space to screen space, then back from screen space
|
|
* to <code>destination</code> space. If exactly one of the two
|
|
* Components is <code>null</code>, it is taken to refer to the root
|
|
* ancestor of the other component. If both are <code>null</code>, no
|
|
* transformation is done.
|
|
*
|
|
* @param source The component which the rectangle is expressed in terms of
|
|
* @param rect The rectangle to convert
|
|
* @param destination The component which the return value will be
|
|
* expressed in terms of
|
|
*
|
|
* @return A new rectangle, equal in size to the input rectangle, but
|
|
* with its position converted from the coordinate space of the source
|
|
* component to the coordinate space of the destination component
|
|
*
|
|
* @see #convertPointToScreen
|
|
* @see #convertPointFromScreen
|
|
* @see #convertPoint(Component, int, int, Component)
|
|
* @see #getRoot
|
|
*/
|
|
public static Rectangle convertRectangle(Component source,
|
|
Rectangle rect,
|
|
Component destination)
|
|
{
|
|
Point pt = convertPoint(source, rect.x, rect.y, destination);
|
|
return new Rectangle(pt.x, pt.y, rect.width, rect.height);
|
|
}
|
|
|
|
/**
|
|
* Convert a mouse event which refrers to one component to another. This
|
|
* includes changing the mouse event's coordinate space, as well as the
|
|
* source property of the event. If <code>source</code> is
|
|
* <code>null</code>, it is taken to refer to <code>destination</code>'s
|
|
* root component. If <code>destination</code> is <code>null</code>, the
|
|
* new event will remain expressed in <code>source</code>'s coordinate
|
|
* system.
|
|
*
|
|
* @param source The component the mouse event currently refers to
|
|
* @param sourceEvent The mouse event to convert
|
|
* @param destination The component the new mouse event should refer to
|
|
*
|
|
* @return A new mouse event expressed in terms of the destination
|
|
* component's coordinate space, and with the destination component as
|
|
* its source
|
|
*
|
|
* @see #convertPoint(Component, int, int, Component)
|
|
*/
|
|
public static MouseEvent convertMouseEvent(Component source,
|
|
MouseEvent sourceEvent,
|
|
Component destination)
|
|
{
|
|
Point newpt = convertPoint(source, sourceEvent.getX(), sourceEvent.getY(),
|
|
destination);
|
|
|
|
return new MouseEvent(destination, sourceEvent.getID(),
|
|
sourceEvent.getWhen(), sourceEvent.getModifiersEx(),
|
|
newpt.x, newpt.y, sourceEvent.getClickCount(),
|
|
sourceEvent.isPopupTrigger(), sourceEvent.getButton());
|
|
}
|
|
|
|
/**
|
|
* Recursively walk the component tree under <code>comp</code> calling
|
|
* <code>updateUI</code> on each {@link JComponent} found. This causes
|
|
* the entire tree to re-initialize its UI delegates.
|
|
*
|
|
* @param comp The component to walk the children of, calling <code>updateUI</code>
|
|
*/
|
|
public static void updateComponentTreeUI(Component comp)
|
|
{
|
|
updateComponentTreeUIImpl(comp);
|
|
if (comp instanceof JComponent)
|
|
{
|
|
JComponent jc = (JComponent) comp;
|
|
jc.revalidate();
|
|
}
|
|
else
|
|
{
|
|
comp.invalidate();
|
|
comp.validate();
|
|
}
|
|
comp.repaint();
|
|
}
|
|
|
|
/**
|
|
* Performs the actual work for {@link #updateComponentTreeUI(Component)}.
|
|
* This calls updateUI() on c if it is a JComponent, and then walks down
|
|
* the component tree and calls this method on each child component.
|
|
*
|
|
* @param c the component to update the UI
|
|
*/
|
|
private static void updateComponentTreeUIImpl(Component c)
|
|
{
|
|
if (c instanceof JComponent)
|
|
{
|
|
JComponent jc = (JComponent) c;
|
|
jc.updateUI();
|
|
}
|
|
|
|
Component[] components = null;
|
|
if (c instanceof JMenu)
|
|
components = ((JMenu) c).getMenuComponents();
|
|
else if (c instanceof Container)
|
|
components = ((Container) c).getComponents();
|
|
if (components != null)
|
|
{
|
|
for (int i = 0; i < components.length; ++i)
|
|
updateComponentTreeUIImpl(components[i]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Layout a "compound label" consisting of a text string and an icon
|
|
* which is to be placed near the rendered text. Once the text and icon
|
|
* are laid out, the text rectangle and icon rectangle parameters are
|
|
* altered to store the calculated positions.</p>
|
|
*
|
|
* <p>The size of the text is calculated from the provided font metrics
|
|
* object. This object should be the metrics of the font you intend to
|
|
* paint the label with.</p>
|
|
*
|
|
* <p>The position values control where the text is placed relative to
|
|
* the icon. The horizontal position value should be one of the constants
|
|
* <code>LEADING</code>, <code>TRAILING</code>, <code>LEFT</code>,
|
|
* <code>RIGHT</code> or <code>CENTER</code>. The vertical position value
|
|
* should be one fo the constants <code>TOP</code>, <code>BOTTOM</code>
|
|
* or <code>CENTER</code>.</p>
|
|
*
|
|
* <p>The text-icon gap value controls the number of pixels between the
|
|
* icon and the text.</p>
|
|
*
|
|
* <p>The alignment values control where the text and icon are placed, as
|
|
* a combined unit, within the view rectangle. The horizontal alignment
|
|
* value should be one of the constants <code>LEADING</code>,
|
|
* <code>TRAILING</code>, <code>LEFT</code>, <code>RIGHT</code> or
|
|
* <code>CENTER</code>. The vertical alignment valus should be one of the
|
|
* constants <code>TOP</code>, <code>BOTTOM</code> or
|
|
* <code>CENTER</code>.</p>
|
|
*
|
|
* <p>If the <code>LEADING</code> or <code>TRAILING</code> constants are
|
|
* given for horizontal alignment or horizontal text position, they are
|
|
* interpreted relative to the provided component's orientation property,
|
|
* a constant in the {@link java.awt.ComponentOrientation} class. For
|
|
* example, if the component's orientation is <code>LEFT_TO_RIGHT</code>,
|
|
* then the <code>LEADING</code> value is a synonym for <code>LEFT</code>
|
|
* and the <code>TRAILING</code> value is a synonym for
|
|
* <code>RIGHT</code></p>
|
|
*
|
|
* <p>If the text and icon are equal to or larger than the view
|
|
* rectangle, the horizontal and vertical alignment values have no
|
|
* affect.</p>
|
|
*
|
|
* @param c A component used for its orientation value
|
|
* @param fm The font metrics used to measure the text
|
|
* @param text The text to place in the compound label
|
|
* @param icon The icon to place next to the text
|
|
* @param verticalAlignment The vertical alignment of the label relative
|
|
* to its component
|
|
* @param horizontalAlignment The horizontal alignment of the label
|
|
* relative to its component
|
|
* @param verticalTextPosition The vertical position of the label's text
|
|
* relative to its icon
|
|
* @param horizontalTextPosition The horizontal position of the label's
|
|
* text relative to its icon
|
|
* @param viewR The view rectangle, specifying the area which layout is
|
|
* constrained to
|
|
* @param iconR A rectangle which is modified to hold the laid-out
|
|
* position of the icon
|
|
* @param textR A rectangle which is modified to hold the laid-out
|
|
* position of the text
|
|
* @param textIconGap The distance between text and icon
|
|
*
|
|
* @return The string of characters, possibly truncated with an elipsis,
|
|
* which is laid out in this label
|
|
*/
|
|
|
|
public static String layoutCompoundLabel(JComponent c,
|
|
FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
|
|
// Fix up the orientation-based horizontal positions.
|
|
|
|
boolean ltr = true;
|
|
if (c != null && ! c.getComponentOrientation().isLeftToRight())
|
|
ltr = false;
|
|
|
|
switch (horizontalTextPosition)
|
|
{
|
|
case LEADING:
|
|
horizontalTextPosition = ltr ? LEFT : RIGHT;
|
|
break;
|
|
case TRAILING:
|
|
horizontalTextPosition = ltr ? RIGHT : LEFT;
|
|
break;
|
|
default:
|
|
// Nothing to do in the other cases.
|
|
}
|
|
|
|
// Fix up the orientation-based alignments.
|
|
switch (horizontalAlignment)
|
|
{
|
|
case LEADING:
|
|
horizontalAlignment = ltr ? LEFT : RIGHT;
|
|
break;
|
|
case TRAILING:
|
|
horizontalAlignment = ltr ? RIGHT : LEFT;
|
|
break;
|
|
default:
|
|
// Nothing to do in the other cases.
|
|
}
|
|
|
|
return layoutCompoundLabelImpl(c, fm, text, icon,
|
|
verticalAlignment,
|
|
horizontalAlignment,
|
|
verticalTextPosition,
|
|
horizontalTextPosition,
|
|
viewR, iconR, textR, textIconGap);
|
|
}
|
|
|
|
/**
|
|
* <p>Layout a "compound label" consisting of a text string and an icon
|
|
* which is to be placed near the rendered text. Once the text and icon
|
|
* are laid out, the text rectangle and icon rectangle parameters are
|
|
* altered to store the calculated positions.</p>
|
|
*
|
|
* <p>The size of the text is calculated from the provided font metrics
|
|
* object. This object should be the metrics of the font you intend to
|
|
* paint the label with.</p>
|
|
*
|
|
* <p>The position values control where the text is placed relative to
|
|
* the icon. The horizontal position value should be one of the constants
|
|
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>. The
|
|
* vertical position value should be one fo the constants
|
|
* <code>TOP</code>, <code>BOTTOM</code> or <code>CENTER</code>.</p>
|
|
*
|
|
* <p>The text-icon gap value controls the number of pixels between the
|
|
* icon and the text.</p>
|
|
*
|
|
* <p>The alignment values control where the text and icon are placed, as
|
|
* a combined unit, within the view rectangle. The horizontal alignment
|
|
* value should be one of the constants <code>LEFT</code>, <code>RIGHT</code> or
|
|
* <code>CENTER</code>. The vertical alignment valus should be one of the
|
|
* constants <code>TOP</code>, <code>BOTTOM</code> or
|
|
* <code>CENTER</code>.</p>
|
|
*
|
|
* <p>If the text and icon are equal to or larger than the view
|
|
* rectangle, the horizontal and vertical alignment values have no
|
|
* affect.</p>
|
|
*
|
|
* <p>Note that this method does <em>not</em> know how to deal with
|
|
* horizontal alignments or positions given as <code>LEADING</code> or
|
|
* <code>TRAILING</code> values. Use the other overloaded variant of this
|
|
* method if you wish to use such values.
|
|
*
|
|
* @param fm The font metrics used to measure the text
|
|
* @param text The text to place in the compound label
|
|
* @param icon The icon to place next to the text
|
|
* @param verticalAlignment The vertical alignment of the label relative
|
|
* to its component
|
|
* @param horizontalAlignment The horizontal alignment of the label
|
|
* relative to its component
|
|
* @param verticalTextPosition The vertical position of the label's text
|
|
* relative to its icon
|
|
* @param horizontalTextPosition The horizontal position of the label's
|
|
* text relative to its icon
|
|
* @param viewR The view rectangle, specifying the area which layout is
|
|
* constrained to
|
|
* @param iconR A rectangle which is modified to hold the laid-out
|
|
* position of the icon
|
|
* @param textR A rectangle which is modified to hold the laid-out
|
|
* position of the text
|
|
* @param textIconGap The distance between text and icon
|
|
*
|
|
* @return The string of characters, possibly truncated with an elipsis,
|
|
* which is laid out in this label
|
|
*/
|
|
|
|
public static String layoutCompoundLabel(FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
return layoutCompoundLabelImpl(null, fm, text, icon, verticalAlignment,
|
|
horizontalAlignment, verticalTextPosition,
|
|
horizontalTextPosition, viewR, iconR, textR,
|
|
textIconGap);
|
|
}
|
|
|
|
/**
|
|
* <p>Layout a "compound label" consisting of a text string and an icon
|
|
* which is to be placed near the rendered text. Once the text and icon
|
|
* are laid out, the text rectangle and icon rectangle parameters are
|
|
* altered to store the calculated positions.</p>
|
|
*
|
|
* <p>The size of the text is calculated from the provided font metrics
|
|
* object. This object should be the metrics of the font you intend to
|
|
* paint the label with.</p>
|
|
*
|
|
* <p>The position values control where the text is placed relative to
|
|
* the icon. The horizontal position value should be one of the constants
|
|
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>. The
|
|
* vertical position value should be one fo the constants
|
|
* <code>TOP</code>, <code>BOTTOM</code> or <code>CENTER</code>.</p>
|
|
*
|
|
* <p>The text-icon gap value controls the number of pixels between the
|
|
* icon and the text.</p>
|
|
*
|
|
* <p>The alignment values control where the text and icon are placed, as
|
|
* a combined unit, within the view rectangle. The horizontal alignment
|
|
* value should be one of the constants <code>LEFT</code>, <code>RIGHT</code> or
|
|
* <code>CENTER</code>. The vertical alignment valus should be one of the
|
|
* constants <code>TOP</code>, <code>BOTTOM</code> or
|
|
* <code>CENTER</code>.</p>
|
|
*
|
|
* <p>If the text and icon are equal to or larger than the view
|
|
* rectangle, the horizontal and vertical alignment values have no
|
|
* affect.</p>
|
|
*
|
|
* <p>Note that this method does <em>not</em> know how to deal with
|
|
* horizontal alignments or positions given as <code>LEADING</code> or
|
|
* <code>TRAILING</code> values. Use the other overloaded variant of this
|
|
* method if you wish to use such values.
|
|
*
|
|
* @param fm The font metrics used to measure the text
|
|
* @param text The text to place in the compound label
|
|
* @param icon The icon to place next to the text
|
|
* @param verticalAlignment The vertical alignment of the label relative
|
|
* to its component
|
|
* @param horizontalAlignment The horizontal alignment of the label
|
|
* relative to its component
|
|
* @param verticalTextPosition The vertical position of the label's text
|
|
* relative to its icon
|
|
* @param horizontalTextPosition The horizontal position of the label's
|
|
* text relative to its icon
|
|
* @param viewR The view rectangle, specifying the area which layout is
|
|
* constrained to
|
|
* @param iconR A rectangle which is modified to hold the laid-out
|
|
* position of the icon
|
|
* @param textR A rectangle which is modified to hold the laid-out
|
|
* position of the text
|
|
* @param textIconGap The distance between text and icon
|
|
*
|
|
* @return The string of characters, possibly truncated with an elipsis,
|
|
* which is laid out in this label
|
|
*/
|
|
private static String layoutCompoundLabelImpl(JComponent c,
|
|
FontMetrics fm,
|
|
String text,
|
|
Icon icon,
|
|
int verticalAlignment,
|
|
int horizontalAlignment,
|
|
int verticalTextPosition,
|
|
int horizontalTextPosition,
|
|
Rectangle viewR,
|
|
Rectangle iconR,
|
|
Rectangle textR,
|
|
int textIconGap)
|
|
{
|
|
|
|
// Work out basic height and width.
|
|
|
|
if (icon == null)
|
|
{
|
|
textIconGap = 0;
|
|
iconR.width = 0;
|
|
iconR.height = 0;
|
|
}
|
|
else
|
|
{
|
|
iconR.width = icon.getIconWidth();
|
|
iconR.height = icon.getIconHeight();
|
|
}
|
|
|
|
if (text == null || text.equals(""))
|
|
{
|
|
textIconGap = 0;
|
|
textR.width = 0;
|
|
textR.height = 0;
|
|
text = "";
|
|
}
|
|
else
|
|
{
|
|
int availableWidth = viewR.width;
|
|
if (horizontalTextPosition != CENTER)
|
|
availableWidth -= iconR.width + textIconGap;
|
|
View html = c == null ? null
|
|
: (View) c.getClientProperty(BasicHTML.propertyKey);
|
|
if (html != null)
|
|
{
|
|
textR.width = (int) html.getPreferredSpan(View.X_AXIS);
|
|
textR.width = Math.min(availableWidth, textR.width);
|
|
textR.height = (int) html.getPreferredSpan(View.Y_AXIS);
|
|
}
|
|
else
|
|
{
|
|
int fromIndex = 0;
|
|
textR.width = fm.stringWidth(text);
|
|
textR.height = fm.getHeight();
|
|
if (textR.width > availableWidth)
|
|
{
|
|
text = clipString(c, fm, text, availableWidth);
|
|
textR.width = fm.stringWidth(text);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Work out the position of text, assuming the top-left coord
|
|
// starts at (0,0). We will fix that up momentarily, after these
|
|
// "position" decisions are made and we look at alignment.
|
|
|
|
switch (verticalTextPosition)
|
|
{
|
|
case TOP:
|
|
textR.y = horizontalTextPosition == CENTER ?
|
|
- textR.height - textIconGap : 0;
|
|
break;
|
|
case BOTTOM:
|
|
textR.y = horizontalTextPosition == CENTER ?
|
|
iconR.height + textIconGap : iconR.height - textR.height;
|
|
break;
|
|
case CENTER:
|
|
textR.y = iconR.height / 2 - textR.height / 2;
|
|
break;
|
|
}
|
|
|
|
switch (horizontalTextPosition)
|
|
{
|
|
case LEFT:
|
|
textR.x = -(textR.width + textIconGap);
|
|
break;
|
|
case RIGHT:
|
|
textR.x = iconR.width + textIconGap;
|
|
break;
|
|
case CENTER:
|
|
textR.x = iconR.width / 2 - textR.width / 2;
|
|
break;
|
|
}
|
|
|
|
// The two rectangles are laid out correctly now, but only assuming
|
|
// that their upper left corner is at (0,0). If we have any alignment other
|
|
// than TOP and LEFT, we need to adjust them.
|
|
|
|
// These coordinates specify the rectangle that contains both the
|
|
// icon and text. Move it so that it fullfills the alignment properties.
|
|
int lx = Math.min(iconR.x, textR.x);
|
|
int lw = Math.max(iconR.x + iconR.width, textR.x + textR.width) - lx;
|
|
int ly = Math.min(iconR.y, textR.y);
|
|
int lh = Math.max(iconR.y + iconR.height, textR.y + textR.height) - ly;
|
|
int horizontalAdjustment = 0;
|
|
int verticalAdjustment = 0;
|
|
switch (verticalAlignment)
|
|
{
|
|
case TOP:
|
|
verticalAdjustment = viewR.y - ly;
|
|
break;
|
|
case BOTTOM:
|
|
verticalAdjustment = viewR.y + viewR.height - ly - lh;
|
|
break;
|
|
case CENTER:
|
|
verticalAdjustment = viewR.y + viewR.height / 2 - ly - lh / 2;
|
|
break;
|
|
}
|
|
switch (horizontalAlignment)
|
|
{
|
|
case LEFT:
|
|
horizontalAdjustment = viewR.x - lx;
|
|
break;
|
|
case RIGHT:
|
|
horizontalAdjustment = viewR.x + viewR.width - lx - lw;
|
|
break;
|
|
case CENTER:
|
|
horizontalAdjustment = (viewR.x + (viewR.width / 2)) - (lx + (lw / 2));
|
|
break;
|
|
}
|
|
iconR.x += horizontalAdjustment;
|
|
iconR.y += verticalAdjustment;
|
|
|
|
textR.x += horizontalAdjustment;
|
|
textR.y += verticalAdjustment;
|
|
|
|
return text;
|
|
}
|
|
|
|
/**
|
|
* The method clips the specified string so that it fits into the
|
|
* available width. It is only called when the text really doesn't fit,
|
|
* so we don't need to check that again.
|
|
*
|
|
* @param c the component
|
|
* @param fm the font metrics
|
|
* @param text the text
|
|
* @param availableWidth the available width
|
|
*
|
|
* @return the clipped string
|
|
*/
|
|
private static String clipString(JComponent c, FontMetrics fm, String text,
|
|
int availableWidth)
|
|
{
|
|
String dots = "...";
|
|
int dotsWidth = fm.stringWidth(dots);
|
|
char[] string = text.toCharArray();
|
|
int endIndex = string.length;
|
|
while (fm.charsWidth(string, 0, endIndex) + dotsWidth > availableWidth
|
|
&& endIndex > 0)
|
|
endIndex--;
|
|
String clipped;
|
|
if (string.length >= endIndex + 3)
|
|
{
|
|
string[endIndex] = '.';
|
|
string[endIndex + 1] = '.';
|
|
string[endIndex + 2] = '.';
|
|
clipped = new String(string, 0, endIndex + 3);
|
|
}
|
|
else
|
|
{
|
|
char[] clippedChars = new char[string.length + 3];
|
|
System.arraycopy(string, 0, clippedChars, 0, string.length);
|
|
clippedChars[endIndex] = '.';
|
|
clippedChars[endIndex + 1] = '.';
|
|
clippedChars[endIndex + 2] = '.';
|
|
clipped = new String(clippedChars, 0, endIndex + 3);
|
|
}
|
|
return clipped;
|
|
}
|
|
|
|
/**
|
|
* Calls {@link java.awt.EventQueue#invokeLater} with the
|
|
* specified {@link Runnable}.
|
|
*/
|
|
public static void invokeLater(Runnable doRun)
|
|
{
|
|
java.awt.EventQueue.invokeLater(doRun);
|
|
}
|
|
|
|
/**
|
|
* Calls {@link java.awt.EventQueue#invokeAndWait} with the
|
|
* specified {@link Runnable}.
|
|
*/
|
|
public static void invokeAndWait(Runnable doRun)
|
|
throws InterruptedException,
|
|
InvocationTargetException
|
|
{
|
|
java.awt.EventQueue.invokeAndWait(doRun);
|
|
}
|
|
|
|
/**
|
|
* Calls {@link java.awt.EventQueue#isDispatchThread()}.
|
|
*
|
|
* @return <code>true</code> if the current thread is the current AWT event
|
|
* dispatch thread.
|
|
*/
|
|
public static boolean isEventDispatchThread()
|
|
{
|
|
return java.awt.EventQueue.isDispatchThread();
|
|
}
|
|
|
|
/**
|
|
* This method paints the given component at the given position and size.
|
|
* The component will be reparented to the container given.
|
|
*
|
|
* @param g The Graphics object to draw with.
|
|
* @param c The Component to draw
|
|
* @param p The Container to reparent to.
|
|
* @param x The x coordinate to draw at.
|
|
* @param y The y coordinate to draw at.
|
|
* @param w The width of the drawing area.
|
|
* @param h The height of the drawing area.
|
|
*/
|
|
public static void paintComponent(Graphics g, Component c, Container p,
|
|
int x, int y, int w, int h)
|
|
{
|
|
Container parent = c.getParent();
|
|
if (parent != null)
|
|
parent.remove(c);
|
|
if (p != null)
|
|
p.add(c);
|
|
|
|
Shape savedClip = g.getClip();
|
|
|
|
g.setClip(x, y, w, h);
|
|
g.translate(x, y);
|
|
|
|
c.paint(g);
|
|
|
|
g.translate(-x, -y);
|
|
g.setClip(savedClip);
|
|
}
|
|
|
|
/**
|
|
* This method paints the given component in the given rectangle.
|
|
* The component will be reparented to the container given.
|
|
*
|
|
* @param g The Graphics object to draw with.
|
|
* @param c The Component to draw
|
|
* @param p The Container to reparent to.
|
|
* @param r The rectangle that describes the drawing area.
|
|
*/
|
|
public static void paintComponent(Graphics g, Component c,
|
|
Container p, Rectangle r)
|
|
{
|
|
paintComponent(g, c, p, r.x, r.y, r.width, r.height);
|
|
}
|
|
|
|
/**
|
|
* This method returns the common Frame owner used in JDialogs or
|
|
* JWindow when no owner is provided.
|
|
*
|
|
* @return The common Frame
|
|
*/
|
|
static Window getOwnerFrame(Window owner)
|
|
{
|
|
Window result = owner;
|
|
if (result == null)
|
|
{
|
|
if (ownerFrame == null)
|
|
ownerFrame = new OwnerFrame();
|
|
result = ownerFrame;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Checks if left mouse button was clicked.
|
|
*
|
|
* @param event the event to check
|
|
*
|
|
* @return true if left mouse was clicked, false otherwise.
|
|
*/
|
|
public static boolean isLeftMouseButton(MouseEvent event)
|
|
{
|
|
return ((event.getModifiers() & InputEvent.BUTTON1_MASK) != 0);
|
|
}
|
|
|
|
/**
|
|
* Checks if middle mouse button was clicked.
|
|
*
|
|
* @param event the event to check
|
|
*
|
|
* @return true if middle mouse was clicked, false otherwise.
|
|
*/
|
|
public static boolean isMiddleMouseButton(MouseEvent event)
|
|
{
|
|
return ((event.getModifiersEx() & InputEvent.BUTTON2_DOWN_MASK)
|
|
== InputEvent.BUTTON2_DOWN_MASK);
|
|
}
|
|
|
|
/**
|
|
* Checks if right mouse button was clicked.
|
|
*
|
|
* @param event the event to check
|
|
*
|
|
* @return true if right mouse was clicked, false otherwise.
|
|
*/
|
|
public static boolean isRightMouseButton(MouseEvent event)
|
|
{
|
|
return ((event.getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK)
|
|
== InputEvent.BUTTON3_DOWN_MASK);
|
|
}
|
|
|
|
/**
|
|
* This frame should be used when constructing a Window/JDialog without
|
|
* a parent. In this case, we are forced to use this frame as a window's
|
|
* parent, because we simply cannot pass null instead of parent to Window
|
|
* constructor, since doing it will result in NullPointerException.
|
|
*/
|
|
private static class OwnerFrame extends Frame
|
|
{
|
|
public void setVisible(boolean b)
|
|
{
|
|
// Do nothing here.
|
|
}
|
|
|
|
public boolean isShowing()
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public static boolean notifyAction(Action action,
|
|
KeyStroke ks,
|
|
KeyEvent event,
|
|
Object sender,
|
|
int modifiers)
|
|
{
|
|
if (action != null && action.isEnabled())
|
|
{
|
|
String name = (String) action.getValue(Action.ACTION_COMMAND_KEY);
|
|
if (name == null
|
|
&& event.getKeyChar() != KeyEvent.CHAR_UNDEFINED)
|
|
name = new String(new char[] {event.getKeyChar()});
|
|
action.actionPerformed(new ActionEvent(sender,
|
|
ActionEvent.ACTION_PERFORMED,
|
|
name, modifiers));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* <p>Change the shared, UI-managed {@link ActionMap} for a given
|
|
* component. ActionMaps are arranged in a hierarchy, in order to
|
|
* encourage sharing of common actions between components. The hierarchy
|
|
* unfortunately places UI-managed ActionMaps at the <em>end</em> of the
|
|
* parent-pointer chain, as illustrated:</p>
|
|
*
|
|
* <pre>
|
|
* [{@link javax.swing.JComponent#getActionMap()}]
|
|
* --> [{@link javax.swing.ActionMap}]
|
|
* parent --> [{@link javax.swing.text.JTextComponent.KeymapActionMap}]
|
|
* parent --> [{@link javax.swing.plaf.ActionMapUIResource}]
|
|
* </pre>
|
|
*
|
|
* <p>Our goal with this method is to replace the first ActionMap along
|
|
* this chain which is an instance of {@link ActionMapUIResource}, since
|
|
* these are the ActionMaps which are supposed to be shared between
|
|
* components.</p>
|
|
*
|
|
* <p>If the provided ActionMap is <code>null</code>, we interpret the
|
|
* call as a request to remove the UI-managed ActionMap from the
|
|
* component's ActionMap parent chain.</p>
|
|
*/
|
|
public static void replaceUIActionMap(JComponent component,
|
|
ActionMap uiActionMap)
|
|
{
|
|
ActionMap child = component.getActionMap();
|
|
if (child == null)
|
|
component.setActionMap(uiActionMap);
|
|
else
|
|
{
|
|
ActionMap parent = child.getParent();
|
|
while (parent != null && !(parent instanceof ActionMapUIResource))
|
|
{
|
|
child = parent;
|
|
parent = child.getParent();
|
|
}
|
|
// Sanity check to avoid loops.
|
|
if (child != uiActionMap)
|
|
child.setParent(uiActionMap);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* <p>Change the shared, UI-managed {@link InputMap} for a given
|
|
* component. InputMaps are arranged in a hierarchy, in order to
|
|
* encourage sharing of common input mappings between components. The
|
|
* hierarchy unfortunately places UI-managed InputMaps at the
|
|
* <em>end</em> of the parent-pointer chain, as illustrated:</p>
|
|
*
|
|
* <pre>
|
|
* [{@link javax.swing.JComponent#getInputMap()}]
|
|
* --> [{@link javax.swing.InputMap}]
|
|
* parent --> [{@link javax.swing.text.JTextComponent.KeymapWrapper}]
|
|
* parent --> [{@link javax.swing.plaf.InputMapUIResource}]
|
|
* </pre>
|
|
*
|
|
* <p>Our goal with this method is to replace the first InputMap along
|
|
* this chain which is an instance of {@link InputMapUIResource}, since
|
|
* these are the InputMaps which are supposed to be shared between
|
|
* components.</p>
|
|
*
|
|
* <p>If the provided InputMap is <code>null</code>, we interpret the
|
|
* call as a request to remove the UI-managed InputMap from the
|
|
* component's InputMap parent chain.</p>
|
|
*/
|
|
public static void replaceUIInputMap(JComponent component,
|
|
int condition,
|
|
InputMap uiInputMap)
|
|
{
|
|
InputMap child = component.getInputMap(condition);
|
|
if (child == null)
|
|
component.setInputMap(condition, uiInputMap);
|
|
else
|
|
{
|
|
InputMap parent = child.getParent();
|
|
while (parent != null && !(parent instanceof InputMapUIResource))
|
|
{
|
|
child = parent;
|
|
parent = parent.getParent();
|
|
}
|
|
// Sanity check to avoid loops.
|
|
if (child != uiInputMap)
|
|
child.setParent(uiInputMap);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Subtracts a rectangle from another and return the area as an array
|
|
* of rectangles.
|
|
* Returns the areas of rectA which are not covered by rectB.
|
|
* If the rectangles do not overlap, or if either parameter is
|
|
* <code>null</code>, a zero-size array is returned.
|
|
* @param rectA The first rectangle
|
|
* @param rectB The rectangle to subtract from the first
|
|
* @return An array of rectangles representing the area in rectA
|
|
* not overlapped by rectB
|
|
*/
|
|
public static Rectangle[] computeDifference(Rectangle rectA, Rectangle rectB)
|
|
{
|
|
if (rectA == null || rectB == null)
|
|
return new Rectangle[0];
|
|
|
|
Rectangle[] r = new Rectangle[4];
|
|
int x1 = rectA.x;
|
|
int y1 = rectA.y;
|
|
int w1 = rectA.width;
|
|
int h1 = rectA.height;
|
|
int x2 = rectB.x;
|
|
int y2 = rectB.y;
|
|
int w2 = rectB.width;
|
|
int h2 = rectB.height;
|
|
|
|
// (outer box = rectA)
|
|
// -------------
|
|
// |_____0_____|
|
|
// | |rectB| |
|
|
// |_1|_____|_2|
|
|
// | 3 |
|
|
// -------------
|
|
int H0 = (y2 > y1) ? y2 - y1 : 0; // height of box 0
|
|
int H3 = (y2 + h2 < y1 + h1) ? y1 + h1 - y2 - h2 : 0; // height box 3
|
|
int W1 = (x2 > x1) ? x2 - x1 : 0; // width box 1
|
|
int W2 = (x1 + w1 > x2 + w2) ? x1 + w1 - x2 - w2 : 0; // w. box 2
|
|
int H12 = (H0 + H3 < h1) ? h1 - H0 - H3 : 0; // height box 1 & 2
|
|
|
|
if (H0 > 0)
|
|
r[0] = new Rectangle(x1, y1, w1, H0);
|
|
else
|
|
r[0] = null;
|
|
|
|
if (W1 > 0 && H12 > 0)
|
|
r[1] = new Rectangle(x1, y1 + H0, W1, H12);
|
|
else
|
|
r[1] = null;
|
|
|
|
if (W2 > 0 && H12 > 0)
|
|
r[2] = new Rectangle(x2 + w2, y1 + H0, W2, H12);
|
|
else
|
|
r[2] = null;
|
|
|
|
if (H3 > 0)
|
|
r[3] = new Rectangle(x1, y1 + H0 + H12, w1, H3);
|
|
else
|
|
r[3] = null;
|
|
|
|
// sort out null objects
|
|
int n = 0;
|
|
for (int i = 0; i < 4; i++)
|
|
if (r[i] != null)
|
|
n++;
|
|
Rectangle[] out = new Rectangle[n];
|
|
for (int i = 3; i >= 0; i--)
|
|
if (r[i] != null)
|
|
out[--n] = r[i];
|
|
|
|
return out;
|
|
}
|
|
|
|
/**
|
|
* Calculates the intersection of two rectangles. The result is stored
|
|
* in <code>rect</code>. This is basically the same
|
|
* like {@link Rectangle#intersection(Rectangle)}, only that it does not
|
|
* create new Rectangle instances. The tradeoff is that you loose any data in
|
|
* <code>rect</code>.
|
|
*
|
|
* @param x upper-left x coodinate of first rectangle
|
|
* @param y upper-left y coodinate of first rectangle
|
|
* @param w width of first rectangle
|
|
* @param h height of first rectangle
|
|
* @param rect a Rectangle object of the second rectangle
|
|
*
|
|
* @throws NullPointerException if rect is null
|
|
*
|
|
* @return a rectangle corresponding to the intersection of the
|
|
* two rectangles. An empty rectangle is returned if the rectangles
|
|
* do not overlap
|
|
*/
|
|
public static Rectangle computeIntersection(int x, int y, int w, int h,
|
|
Rectangle rect)
|
|
{
|
|
int x2 = (int) rect.x;
|
|
int y2 = (int) rect.y;
|
|
int w2 = (int) rect.width;
|
|
int h2 = (int) rect.height;
|
|
|
|
int dx = (x > x2) ? x : x2;
|
|
int dy = (y > y2) ? y : y2;
|
|
int dw = (x + w < x2 + w2) ? (x + w - dx) : (x2 + w2 - dx);
|
|
int dh = (y + h < y2 + h2) ? (y + h - dy) : (y2 + h2 - dy);
|
|
|
|
if (dw >= 0 && dh >= 0)
|
|
rect.setBounds(dx, dy, dw, dh);
|
|
else
|
|
rect.setBounds(0, 0, 0, 0);
|
|
|
|
return rect;
|
|
}
|
|
|
|
/**
|
|
* Calculates the width of a given string.
|
|
*
|
|
* @param fm the <code>FontMetrics</code> object to use
|
|
* @param str the string
|
|
*
|
|
* @return the width of the the string.
|
|
*/
|
|
public static int computeStringWidth(FontMetrics fm, String str)
|
|
{
|
|
return fm.stringWidth(str);
|
|
}
|
|
|
|
/**
|
|
* Calculates the union of two rectangles. The result is stored in
|
|
* <code>rect</code>. This is basically the same as
|
|
* {@link Rectangle#union(Rectangle)} except that it avoids creation of new
|
|
* Rectangle objects. The tradeoff is that you loose any data in
|
|
* <code>rect</code>.
|
|
*
|
|
* @param x upper-left x coodinate of first rectangle
|
|
* @param y upper-left y coodinate of first rectangle
|
|
* @param w width of first rectangle
|
|
* @param h height of first rectangle
|
|
* @param rect a Rectangle object of the second rectangle
|
|
*
|
|
* @throws NullPointerException if rect is null
|
|
*
|
|
* @return a rectangle corresponding to the union of the
|
|
* two rectangles; a rectangle encompassing both is returned if the
|
|
* rectangles do not overlap
|
|
*/
|
|
public static Rectangle computeUnion(int x, int y, int w, int h,
|
|
Rectangle rect)
|
|
{
|
|
int x2 = (int) rect.x;
|
|
int y2 = (int) rect.y;
|
|
int w2 = (int) rect.width;
|
|
int h2 = (int) rect.height;
|
|
|
|
int dx = (x < x2) ? x : x2;
|
|
int dy = (y < y2) ? y : y2;
|
|
int dw = (x + w > x2 + w2) ? (x + w - dx) : (x2 + w2 - dx);
|
|
int dh = (y + h > y2 + h2) ? (y + h - dy) : (y2 + h2 - dy);
|
|
|
|
if (dw >= 0 && dh >= 0)
|
|
rect.setBounds(dx, dy, dw, dh);
|
|
else
|
|
rect.setBounds(0, 0, 0, 0);
|
|
return rect;
|
|
}
|
|
|
|
/**
|
|
* Tests if a rectangle contains another.
|
|
* @param a first rectangle
|
|
* @param b second rectangle
|
|
* @return true if a contains b, false otherwise
|
|
* @throws NullPointerException
|
|
*/
|
|
public static boolean isRectangleContainingRectangle(Rectangle a, Rectangle b)
|
|
{
|
|
// Note: zero-size rects inclusive, differs from Rectangle.contains()
|
|
return b.width >= 0 && b.height >= 0 && b.width >= 0 && b.height >= 0
|
|
&& b.x >= a.x && b.x + b.width <= a.x + a.width && b.y >= a.y
|
|
&& b.y + b.height <= a.y + a.height;
|
|
}
|
|
|
|
/**
|
|
* Returns the InputMap that is provided by the ComponentUI of
|
|
* <code>component</code> for the specified condition.
|
|
*
|
|
* @param component the component for which the InputMap is returned
|
|
* @param cond the condition that specifies which of the three input
|
|
* maps should be returned, may be
|
|
* {@link JComponent#WHEN_IN_FOCUSED_WINDOW},
|
|
* {@link JComponent#WHEN_FOCUSED} or
|
|
* {@link JComponent#WHEN_ANCESTOR_OF_FOCUSED_COMPONENT}
|
|
*
|
|
* @return The input map.
|
|
*/
|
|
public static InputMap getUIInputMap(JComponent component, int cond)
|
|
{
|
|
if (UIManager.getUI(component) != null)
|
|
// we assume here that the UI class sets the parent of the component's
|
|
// InputMap, which is the correct behaviour. If it's not, then
|
|
// this can be considered a bug
|
|
return component.getInputMap(cond).getParent();
|
|
else
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns the ActionMap that is provided by the ComponentUI of
|
|
* <code>component</code>.
|
|
*
|
|
* @param component the component for which the ActionMap is returned
|
|
*/
|
|
public static ActionMap getUIActionMap(JComponent component)
|
|
{
|
|
if (UIManager.getUI(component) != null)
|
|
// we assume here that the UI class sets the parent of the component's
|
|
// ActionMap, which is the correct behaviour. If it's not, then
|
|
// this can be considered a bug
|
|
return component.getActionMap().getParent();
|
|
else
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Processes key bindings for the component that is associated with the
|
|
* key event. Note that this method does not make sense for
|
|
* JComponent-derived components, except when
|
|
* {@link JComponent#processKeyEvent(KeyEvent)} is overridden and super is
|
|
* not called.
|
|
*
|
|
* This method searches through the component hierarchy of the component's
|
|
* top-level container to find a <code>JComponent</code> that has a binding
|
|
* for the key event in the WHEN_IN_FOCUSED_WINDOW scope.
|
|
*
|
|
* @param ev the key event
|
|
*
|
|
* @return <code>true</code> if a binding has been found and processed,
|
|
* <code>false</code> otherwise
|
|
*
|
|
* @since 1.4
|
|
*/
|
|
public static boolean processKeyBindings(KeyEvent ev)
|
|
{
|
|
Component c = ev.getComponent();
|
|
KeyStroke s = KeyStroke.getKeyStrokeForEvent(ev);
|
|
KeyboardManager km = KeyboardManager.getManager();
|
|
return km.processKeyStroke(c, s, ev);
|
|
}
|
|
|
|
/**
|
|
* Returns a string representing one of the horizontal alignment codes
|
|
* defined in the {@link SwingConstants} interface. The following table
|
|
* lists the constants and return values:
|
|
* <p>
|
|
* <table border="0">
|
|
* <tr>
|
|
* <th>Code:</th><th>Returned String:</th>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#CENTER}</td>
|
|
* <td><code>"CENTER"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#LEFT}</td>
|
|
* <td><code>"LEFT"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#RIGHT}</td>
|
|
* <td><code>"RIGHT"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#LEADING}</td>
|
|
* <td><code>"LEADING"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#TRAILING}</td>
|
|
* <td><code>"TRAILING"</code></td>
|
|
* </tr>
|
|
* </table>
|
|
* </p>
|
|
* If the supplied code is not one of those listed, this methods will throw
|
|
* an {@link IllegalArgumentException}.
|
|
*
|
|
* @param code the code.
|
|
*
|
|
* @return A string representing the given code.
|
|
*/
|
|
static String convertHorizontalAlignmentCodeToString(int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case SwingConstants.CENTER:
|
|
return "CENTER";
|
|
case SwingConstants.LEFT:
|
|
return "LEFT";
|
|
case SwingConstants.RIGHT:
|
|
return "RIGHT";
|
|
case SwingConstants.LEADING:
|
|
return "LEADING";
|
|
case SwingConstants.TRAILING:
|
|
return "TRAILING";
|
|
default:
|
|
throw new IllegalArgumentException("Unrecognised code: " + code);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a string representing one of the vertical alignment codes
|
|
* defined in the {@link SwingConstants} interface. The following table
|
|
* lists the constants and return values:
|
|
* <p>
|
|
* <table border="0">
|
|
* <tr>
|
|
* <th>Code:</th><th>Returned String:</th>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#CENTER}</td>
|
|
* <td><code>"CENTER"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#TOP}</td>
|
|
* <td><code>"TOP"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link SwingConstants#BOTTOM}</td>
|
|
* <td><code>"BOTTOM"</code></td>
|
|
* </tr>
|
|
* </table>
|
|
* </p>
|
|
* If the supplied code is not one of those listed, this methods will throw
|
|
* an {@link IllegalArgumentException}.
|
|
*
|
|
* @param code the code.
|
|
*
|
|
* @return A string representing the given code.
|
|
*/
|
|
static String convertVerticalAlignmentCodeToString(int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case SwingConstants.CENTER:
|
|
return "CENTER";
|
|
case SwingConstants.TOP:
|
|
return "TOP";
|
|
case SwingConstants.BOTTOM:
|
|
return "BOTTOM";
|
|
default:
|
|
throw new IllegalArgumentException("Unrecognised code: " + code);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a string representing one of the default operation codes
|
|
* defined in the {@link WindowConstants} interface. The following table
|
|
* lists the constants and return values:
|
|
* <p>
|
|
* <table border="0">
|
|
* <tr>
|
|
* <th>Code:</th><th>Returned String:</th>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link WindowConstants#DO_NOTHING_ON_CLOSE}</td>
|
|
* <td><code>"DO_NOTHING_ON_CLOSE"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link WindowConstants#HIDE_ON_CLOSE}</td>
|
|
* <td><code>"HIDE_ON_CLOSE"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link WindowConstants#DISPOSE_ON_CLOSE}</td>
|
|
* <td><code>"DISPOSE_ON_CLOSE"</code></td>
|
|
* </tr>
|
|
* <tr>
|
|
* <td>{@link WindowConstants#EXIT_ON_CLOSE}</td>
|
|
* <td><code>"EXIT_ON_CLOSE"</code></td>
|
|
* </tr>
|
|
* </table>
|
|
* </p>
|
|
* If the supplied code is not one of those listed, this method will throw
|
|
* an {@link IllegalArgumentException}.
|
|
*
|
|
* @param code the code.
|
|
*
|
|
* @return A string representing the given code.
|
|
*/
|
|
static String convertWindowConstantToString(int code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case WindowConstants.DO_NOTHING_ON_CLOSE:
|
|
return "DO_NOTHING_ON_CLOSE";
|
|
case WindowConstants.HIDE_ON_CLOSE:
|
|
return "HIDE_ON_CLOSE";
|
|
case WindowConstants.DISPOSE_ON_CLOSE:
|
|
return "DISPOSE_ON_CLOSE";
|
|
case WindowConstants.EXIT_ON_CLOSE:
|
|
return "EXIT_ON_CLOSE";
|
|
default:
|
|
throw new IllegalArgumentException("Unrecognised code: " + code);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Converts a rectangle in the coordinate system of a child component into
|
|
* a rectangle of one of it's Ancestors. The result is stored in the input
|
|
* rectangle.
|
|
*
|
|
* @param comp the child component
|
|
* @param r the rectangle to convert
|
|
* @param ancestor the ancestor component
|
|
*/
|
|
static void convertRectangleToAncestor(Component comp, Rectangle r,
|
|
Component ancestor)
|
|
{
|
|
if (comp == ancestor)
|
|
return;
|
|
|
|
r.x += comp.getX();
|
|
r.y += comp.getY();
|
|
|
|
Component parent = comp.getParent();
|
|
if (parent != null && parent != ancestor)
|
|
convertRectangleToAncestor(parent, r, ancestor);
|
|
}
|
|
}
|