mirror of
https://github.com/AppleCommander/AppleCommander.git
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67 lines
2.3 KiB
Java
67 lines
2.3 KiB
Java
/*
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* AppleCommander - An Apple ][ image utility.
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* Copyright (C) 2002-2003 by Robert Greene
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* robgreene at users.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package com.webcodepro.applecommander.ui.swt.util;
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import org.eclipse.swt.custom.ScrolledComposite;
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import org.eclipse.swt.graphics.FontMetrics;
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import org.eclipse.swt.graphics.GC;
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import org.eclipse.swt.graphics.Rectangle;
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import org.eclipse.swt.widgets.Shell;
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/**
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* SWT-related utility code.
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* <p>
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* Date Created: Mar 5, 2003
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* @author Rob Greene
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*/
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public class SwtUtil {
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/**
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* Center the child shell within the parent shell window.
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*/
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public static void center(Shell parent, Shell child) {
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int x = parent.getLocation().x +
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(parent.getSize().x - child.getSize().x) / 2;
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int y = parent.getLocation().y +
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(parent.getSize().y - child.getSize().y) / 2;
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if (x < 0) x = 0;
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if (y < 0) y = 0;
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child.setLocation(x,y);
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}
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/**
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* Setup some sensible paging information.
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*/
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public static void setupPagingInformation(ScrolledComposite composite) {
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GC gc = new GC(composite);
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FontMetrics fontMetrics = gc.getFontMetrics();
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gc.dispose();
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int fontHeight = fontMetrics.getHeight();
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int fontWidth = fontMetrics.getAverageCharWidth();
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Rectangle clientArea = composite.getClientArea();
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int lines = clientArea.height / fontHeight;
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int pageHeight = lines * fontHeight;
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int pageWidth = clientArea.width - fontWidth;
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composite.getVerticalBar().setIncrement(fontHeight);
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composite.getVerticalBar().setPageIncrement(pageHeight);
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composite.getHorizontalBar().setIncrement(fontWidth);
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composite.getHorizontalBar().setPageIncrement(pageWidth);
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}
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}
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