treetab.java

一个简单的UNCODE 码生成程序

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.controlexample;


import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;

class TreeTab extends ScrollableTab {
	/* Example widgets and groups that contain them */
	Tree tree1, tree2;
	TreeItem textNode1, imageNode1;
	Group treeGroup, imageTreeGroup, itemGroup;
	
	/* Style widgets added to the "Style" group */
	Button checkButton, fullSelectionButton;

	/* Other widgets added to the "Other" group */
	Button multipleColumns, headerVisibleButton, linesVisibleButton;
	
	/* Controls and resources added to the "Colors" group */
	Button itemForegroundButton, itemBackgroundButton, itemFontButton;
	Color itemForegroundColor, itemBackgroundColor;
	Image itemForegroundImage, itemBackgroundImage;
	Font itemFont;
	
	static String [] columnTitles	= {ControlExample.getResourceString("TableTitle_0"),
		   ControlExample.getResourceString("TableTitle_1"),
		   ControlExample.getResourceString("TableTitle_2"),
		   ControlExample.getResourceString("TableTitle_3")};
		   
	static String[][] tableData = {
			{ ControlExample.getResourceString("TableLine0_0"),
					ControlExample.getResourceString("TableLine0_1"),
					ControlExample.getResourceString("TableLine0_2"),
					ControlExample.getResourceString("TableLine0_3") },
			{ ControlExample.getResourceString("TableLine1_0"),
					ControlExample.getResourceString("TableLine1_1"),
					ControlExample.getResourceString("TableLine1_2"),
					ControlExample.getResourceString("TableLine1_3") },
			{ ControlExample.getResourceString("TableLine2_0"),
					ControlExample.getResourceString("TableLine2_1"),
					ControlExample.getResourceString("TableLine2_2"),
					ControlExample.getResourceString("TableLine2_3") } };

	/**
	 * Creates the Tab within a given instance of ControlExample.
	 */
	TreeTab(ControlExample instance) {
		super(instance);
	}

	/**
	 * Creates the "Colors" group.
	 */
	void createColorGroup () {
		super.createColorGroup();
		
		itemGroup = new Group (colorGroup, SWT.NONE);
		itemGroup.setText (ControlExample.getResourceString ("Tree_Item_Colors"));
		GridData data = new GridData ();
		data.horizontalSpan = 2;
		itemGroup.setLayoutData (data);
		itemGroup.setLayout (new GridLayout (2, false));
		new Label (itemGroup, SWT.NONE).setText (ControlExample.getResourceString ("Foreground_Color"));
		itemForegroundButton = new Button (itemGroup, SWT.PUSH);
		new Label (itemGroup, SWT.NONE).setText (ControlExample.getResourceString ("Background_Color"));
		itemBackgroundButton = new Button (itemGroup, SWT.PUSH);
		itemFontButton = new Button (itemGroup, SWT.PUSH);
		itemFontButton.setText(ControlExample.getResourceString("Font"));
		itemFontButton.setLayoutData(new GridData (GridData.HORIZONTAL_ALIGN_FILL));
		
		Shell shell = colorGroup.getShell ();
		final ColorDialog foregroundDialog = new ColorDialog (shell);
		final ColorDialog backgroundDialog = new ColorDialog (shell);
		final FontDialog fontDialog = new FontDialog (shell);

		int imageSize = 12;
		Display display = shell.getDisplay ();
		itemForegroundImage = new Image(display, imageSize, imageSize);
		itemBackgroundImage = new Image(display, imageSize, imageSize);

		/* Add listeners to set the colors and font */
		itemForegroundButton.setImage(itemForegroundImage);
		itemForegroundButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				Color oldColor = itemForegroundColor;
				if (oldColor == null) oldColor = textNode1.getForeground ();
				foregroundDialog.setRGB(oldColor.getRGB());
				RGB rgb = foregroundDialog.open();
				if (rgb == null) return;
				oldColor = itemForegroundColor;
				itemForegroundColor = new Color (event.display, rgb);
				setItemForeground ();
				if (oldColor != null) oldColor.dispose ();
			}
		});
		itemBackgroundButton.setImage(itemBackgroundImage);
		itemBackgroundButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				Color oldColor = itemBackgroundColor;
				if (oldColor == null) oldColor = textNode1.getBackground ();
				backgroundDialog.setRGB(oldColor.getRGB());
				RGB rgb = backgroundDialog.open();
				if (rgb == null) return;
				oldColor = itemBackgroundColor;
				itemBackgroundColor = new Color (event.display, rgb);
				setItemBackground ();
				if (oldColor != null) oldColor.dispose ();
			}
		});
		itemFontButton.addSelectionListener(new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				Font oldFont = itemFont;
				if (oldFont == null) oldFont = textNode1.getFont ();
				fontDialog.setFontList(oldFont.getFontData());
				FontData fontData = fontDialog.open ();
				if (fontData == null) return;
				oldFont = itemFont;
				itemFont = new Font (event.display, fontData);
				setItemFont ();
				setExampleWidgetSize ();
				if (oldFont != null) oldFont.dispose ();
			}
		});
		shell.addDisposeListener(new DisposeListener() {
			public void widgetDisposed(DisposeEvent event) {
				if (itemBackgroundImage != null) itemBackgroundImage.dispose();
				if (itemForegroundImage != null) itemForegroundImage.dispose();
				if (itemBackgroundColor != null) itemBackgroundColor.dispose();
				if (itemForegroundColor != null) itemForegroundColor.dispose();
				if (itemFont != null) itemFont.dispose();
				itemBackgroundColor = null;
				itemForegroundColor = null;			
				itemFont = null;
			}
		});
	}

	/**
	 * Creates the "Other" group.
	 */
	void createOtherGroup () {
		super.createOtherGroup ();
	
		/* Create display controls specific to this example */
		multipleColumns = new Button (otherGroup, SWT.CHECK);
		multipleColumns.setText (ControlExample.getResourceString("Multiple_Columns"));
		headerVisibleButton = new Button (otherGroup, SWT.CHECK);
		headerVisibleButton.setText (ControlExample.getResourceString("Header_Visible"));
		linesVisibleButton = new Button (otherGroup, SWT.CHECK);
		linesVisibleButton.setText (ControlExample.getResourceString("Lines_Visible"));
	
		/* Add the listeners */
		multipleColumns.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				recreateExampleWidgets ();
			}
		});
		headerVisibleButton.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				setWidgetHeaderVisible ();
			}
		});
		linesVisibleButton.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				setWidgetLinesVisible ();
			}
		});
	}
	
	/**
	 * Creates the "Example" group.
	 */
	void createExampleGroup () {
		super.createExampleGroup ();
		
		/* Create a group for the text tree */
		treeGroup = new Group (exampleGroup, SWT.NONE);
		treeGroup.setLayout (new GridLayout ());
		treeGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
		treeGroup.setText ("Tree");
	
		/* Create a group for the image tree */
		imageTreeGroup = new Group (exampleGroup, SWT.NONE);
		imageTreeGroup.setLayout (new GridLayout ());
		imageTreeGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
		imageTreeGroup.setText (ControlExample.getResourceString("Tree_With_Images"));
	}
	
	/**
	 * Creates the "Example" widgets.
	 */
	void createExampleWidgets () {
		/* Compute the widget style */
		int style = getDefaultStyle();
		if (singleButton.getSelection()) style |= SWT.SINGLE;
		if (multiButton.getSelection()) style |= SWT.MULTI;
		if (checkButton.getSelection()) style |= SWT.CHECK;
		if (fullSelectionButton.getSelection ()) style |= SWT.FULL_SELECTION;
		if (borderButton.getSelection()) style |= SWT.BORDER;
	
		/* Create the text tree */
		tree1 = new Tree (treeGroup, style);
		if (multipleColumns.getSelection()) {
			for (int i = 0; i < columnTitles.length; i++) {
				TreeColumn treeColumn = new TreeColumn(tree1, SWT.NONE);
				treeColumn.setText(columnTitles[i]);
			}
		}
		for (int i = 0; i < 4; i++) {
			TreeItem item = new TreeItem (tree1, SWT.NONE);
			setItemText(item, i, ControlExample.getResourceString("Node_" + (i + 1)));
			if (i < 3) {
				TreeItem subitem = new TreeItem (item, SWT.NONE);
				setItemText(subitem, i, ControlExample.getResourceString("Node_" + (i + 1) + "_1"));
			}
		}
		TreeItem treeRoots[] = tree1.getItems ();