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484 lines
14 KiB
Java
484 lines
14 KiB
Java
/* MetalScrollButton.java
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Copyright (C) 2005 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.plaf.metal;
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import java.awt.Dimension;
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import java.awt.Graphics;
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import java.awt.Rectangle;
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import javax.swing.SwingUtilities;
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import javax.swing.plaf.basic.BasicArrowButton;
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/**
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* A button used by the {@link MetalScrollBarUI}. The button appearance
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* varies according to the button direction, whether or not it is part of a
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* "free standing" scroll bar, and the current state of the button.
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*/
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public class MetalScrollButton extends BasicArrowButton
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{
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/**
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* The maximum size for buttons.
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* @see #getMaximumSize()
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*/
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private static Dimension maximumSize;
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/** The width of the button. */
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private int buttonWidth;
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/**
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* A flag that indicates whether the button is part of a free standing
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* scroll bar. This affects how the border is drawn.
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*/
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private boolean freeStanding;
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/**
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* Creates a new button.
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*
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* @param direction the direction (this should be one of {@link #NORTH},
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* {@link #SOUTH}, {@link #EAST} and {@link #WEST}, but
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* this is not enforced).
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* @param width the button width.
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* @param freeStanding a flag indicating whether the scroll button is free
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* standing or not.
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*/
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public MetalScrollButton(int direction, int width, boolean freeStanding)
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{
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super(direction);
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buttonWidth = width;
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this.freeStanding = freeStanding;
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setFocusable(false);
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}
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/**
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* Returns the button width.
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*
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* @return The button width.
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*/
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public int getButtonWidth()
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{
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return buttonWidth;
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}
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/**
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* Sets the free standing flag. This controls how the button border is
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* drawn.
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*
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* @param freeStanding the new value of the flag.
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*/
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public void setFreeStanding(boolean freeStanding)
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{
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this.freeStanding = freeStanding;
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}
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/**
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* Paints the button.
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*
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* @param g the graphics device.
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*/
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public void paint(Graphics g)
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{
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Rectangle bounds = SwingUtilities.getLocalBounds(this);
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// fill the background
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if (getModel().isPressed())
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g.setColor(MetalLookAndFeel.getControlShadow());
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else
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g.setColor(MetalLookAndFeel.getControl());
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g.fillRect(0, 0, bounds.width, bounds.height);
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paintArrow(g, bounds.width, bounds.height);
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// paint a border manually - I tried using a real (custom) Border
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// but couldn't get it to stay set for the button, something was
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// overwriting it...
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if (freeStanding)
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{
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if (direction == WEST)
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paintWestBorderFreeStanding(g, bounds.width, bounds.height);
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else if (direction == EAST)
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paintEastBorderFreeStanding(g, bounds.width, bounds.height);
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else if (direction == SOUTH)
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paintSouthBorderFreeStanding(g, bounds.width, bounds.height);
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else // asume NORTH
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paintNorthBorderFreeStanding(g, bounds.width, bounds.height);
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}
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else
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{
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if (direction == WEST)
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paintWestBorder(g, bounds.width, bounds.height);
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else if (direction == EAST)
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paintEastBorder(g, bounds.width, bounds.height);
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else if (direction == SOUTH)
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paintSouthBorder(g, bounds.width, bounds.height);
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else // asume NORTH
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paintNorthBorder(g, bounds.width, bounds.height);
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}
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}
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private void paintArrow(Graphics g, int w, int h)
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{
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if (isEnabled())
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g.setColor(MetalLookAndFeel.getBlack());
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else
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g.setColor(MetalLookAndFeel.getControlDisabled());
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if (direction == SOUTH)
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{
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int x = w / 2;
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int y = h / 2 + 2;
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for (int i = 1; i < 5; i++)
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g.drawLine(x - i, y - i, x + i - 1, y - i);
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}
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else if (direction == EAST)
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{
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int x = w / 2 + 2;
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int y = h / 2;
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for (int i = 1; i < 5; i++)
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g.drawLine(x - i, y - i, x - i, y + i - 1);
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}
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else if (direction == WEST)
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{
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int x = w / 2 - 3;
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int y = h / 2;
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for (int i = 1; i < 5; i++)
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g.drawLine(x + i, y - i, x + i, y + i - 1);
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}
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else // assume NORTH
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{
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int x = w / 2;
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int y = h / 2 - 3;
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for (int i = 1; i < 5; i++)
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g.drawLine(x - i, y + i, x + i - 1, y + i);
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}
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}
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/**
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* Paints the border for a button with a {@link #NORTH} direction that
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* belongs to a free standing scroll bar.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintNorthBorderFreeStanding(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, w - 2, 0);
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g.drawLine(0, 0, 0, h - 1);
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g.drawLine(2, h - 1, w - 2, h - 1);
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g.drawLine(w - 2, 2, w - 2, h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(1, 1, 1, h - 2);
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g.drawLine(1, 1, w - 3, 1);
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g.drawLine(w - 1, 1, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControl());
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g.drawLine(1, h - 1, 1, h - 1);
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g.drawLine(w - 2, 1, w - 2, 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, w - 1, 0);
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g.drawLine(w - 1, 0, w - 1, h - 1);
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g.drawLine(0, 0, 0, h - 1);
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}
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}
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/**
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* Paints the border for a button with a {@link #SOUTH} direction that
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* belongs to a free standing scroll bar.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintSouthBorderFreeStanding(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, w - 2, 0);
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g.drawLine(0, 0, 0, h - 1);
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g.drawLine(2, h - 1, w - 2, h - 1);
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g.drawLine(w - 2, 2, w - 2, h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(1, 1, 1, h - 1);
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g.drawLine(1, 1, w - 1, 1);
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g.drawLine(w - 1, 1, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControl());
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g.drawLine(1, h - 1, 1, h - 1);
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g.drawLine(w - 1, 1, w - 1, 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, h - 1, w - 1, h - 1);
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g.drawLine(w - 1, 0, w - 1, h - 1);
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g.drawLine(0, 0, 0, h - 1);
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}
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}
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/**
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* Paints the border for a button with an {@link #EAST} direction that
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* belongs to a free standing scroll bar.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintEastBorderFreeStanding(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, w - 2, 0);
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g.drawLine(w - 2, 0, w - 2, h - 2);
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g.drawLine(0, h - 2, w - 2, h - 2);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(0, 1, w - 1, 1);
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g.drawLine(w - 1, 1, w - 1, h - 1);
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g.drawLine(0, h - 1, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControl());
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g.drawLine(w - 2, 1, w - 2, 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, w - 1, 0);
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g.drawLine(w - 1, 0, w - 1, h - 1);
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g.drawLine(0, h - 1, w - 1, h - 1);
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}
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}
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/**
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* Paints the border for a button with a {@link #WEST} direction that
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* belongs to a free standing scroll bar.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintWestBorderFreeStanding(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, w - 1, 0);
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g.drawLine(0, 0, 0, h - 2);
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g.drawLine(0, h - 2, w - 1, h - 2);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(1, 1, w - 1, 1);
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g.drawLine(1, 1, 1, h - 1);
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g.drawLine(1, h - 1, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControl());
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g.drawLine(1, h - 2, 1, h - 2);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, w - 1, 0);
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g.drawLine(0, 0, 0, h - 1);
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g.drawLine(0, h - 1, w - 1, h - 1);
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}
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}
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/**
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* Paints the border for a button with a {@link #NORTH} direction that
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* belongs to a scroll bar that is not free standing.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintNorthBorder(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, 0, h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(1, 0, 1, h - 1);
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g.drawLine(1, 0, w - 1, 0);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, 0, h - 1);
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}
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}
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/**
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* Paints the border for a button with a {@link #SOUTH} direction that
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* belongs to a scroll bar that is not free standing.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintSouthBorder(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, 0, h - 1);
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g.drawLine(0, h - 1, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(1, 0, 1, h - 1);
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g.drawLine(1, 0, w - 1, 0);
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g.setColor(MetalLookAndFeel.getControl());
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g.drawLine(1, h - 1, 1, h - 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, 0, h - 1);
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}
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}
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/**
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* Paints the border for a button with an {@link #EAST} direction that
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* belongs to a scroll bar that is not free standing.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintEastBorder(Graphics g, int w, int h)
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{
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, w - 1, 0);
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g.drawLine(w - 1, 2, w - 1, h - 1);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(0, 1, w - 2, 1);
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g.drawLine(0, 1, 0, h - 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, w - 1, 0);
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}
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}
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/**
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* Paints the border for a button with a {@link #WEST} direction that
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* belongs to a scroll bar that is not free standing.
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*
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* @param g the graphics device.
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* @param w the button width.
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* @param h the button height.
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*/
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private void paintWestBorder(Graphics g, int w, int h)
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{
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Rectangle bounds = SwingUtilities.getLocalBounds(this);
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if (isEnabled())
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{
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g.setColor(MetalLookAndFeel.getControlDarkShadow());
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g.drawLine(0, 0, bounds.width - 1, 0);
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g.setColor(MetalLookAndFeel.getControlHighlight());
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g.drawLine(0, 1, bounds.width - 1, 1);
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g.drawLine(0, 1, 0, bounds.height - 1);
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}
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else
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{
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g.setColor(MetalLookAndFeel.getControlDisabled());
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g.drawLine(0, 0, bounds.width - 1, 0);
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}
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}
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/**
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* Returns the preferred size for the button, which varies depending on
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* the direction of the button and whether or not it is free standing.
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*
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* @return The preferred size.
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*/
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public Dimension getPreferredSize()
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{
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int adj = 1;
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if (!freeStanding)
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adj = 2;
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if (direction == EAST)
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return new Dimension(buttonWidth - adj, buttonWidth);
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else if (direction == WEST)
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return new Dimension(buttonWidth - 2, buttonWidth);
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else if (direction == SOUTH)
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return new Dimension(buttonWidth, buttonWidth - adj);
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else // assume NORTH
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return new Dimension(buttonWidth, buttonWidth - 2);
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}
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/**
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* Returns the minimum size for the button.
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*
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* @return The minimum size for the button.
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*/
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public Dimension getMinimumSize()
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{
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return getPreferredSize();
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}
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/**
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* Returns the maximum size for the button.
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*
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* @return <code>Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE)</code>.
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*/
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public Dimension getMaximumSize()
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{
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if (maximumSize == null)
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maximumSize = new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
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return maximumSize;
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}
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}
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