treetab.java

一个简单的UNCODE 码生成程序

		TreeItem item = new TreeItem (treeRoots[1], SWT.NONE);
		setItemText(item, 1, ControlExample.getResourceString("Node_2_2"));
		item = new TreeItem (item, SWT.NONE);
		setItemText(item, 1, ControlExample.getResourceString("Node_2_2_1"));					
		textNode1 = treeRoots[0];
		packColumns(tree1);

		/* Create the image tree */	
		tree2 = new Tree (imageTreeGroup, style);
		Image image = instance.images[ControlExample.ciClosedFolder];
		if (multipleColumns.getSelection()) {
			for (int i = 0; i < columnTitles.length; i++) {
				TreeColumn treeColumn = new TreeColumn(tree2, SWT.NONE);
				treeColumn.setText(columnTitles[i]);
			}
		}
		for (int i = 0; i < 4; i++) {
			item = new TreeItem (tree2, SWT.NONE);
			setItemText(item, i, ControlExample.getResourceString("Node_" + (i + 1)));
			item.setImage(image);
			if (i < 3) {
				TreeItem subitem = new TreeItem (item, SWT.NONE);
				setItemText(subitem, i, ControlExample.getResourceString("Node_" + (i + 1) + "_1"));
				subitem.setImage(image);
			}
		}
		treeRoots = tree2.getItems ();
		item = new TreeItem (treeRoots[1], SWT.NONE);
		setItemText(item, 1, ControlExample.getResourceString("Node_2_2"));
		item.setImage(image);
		item = new TreeItem (item, SWT.NONE);
		setItemText(item, 1, ControlExample.getResourceString("Node_2_2_1"));
		item.setImage(image);
		imageNode1 = treeRoots[0];
		packColumns(tree2);
	}
	
	void setItemText(TreeItem item, int i, String node) {
		int index = i % 3;
		if (multipleColumns.getSelection()) {
			tableData [index][0] = node;
			item.setText (tableData [index]);
		} else {
			item.setText (node);
		}		
	}
	
	/**
	 * Creates the "Style" group.
	 */
	void createStyleGroup() {
		super.createStyleGroup();
		
		/* Create the extra widgets */
		checkButton = new Button (styleGroup, SWT.CHECK);
		checkButton.setText ("SWT.CHECK");
		fullSelectionButton = new Button (styleGroup, SWT.CHECK);
		fullSelectionButton.setText ("SWT.FULL_SELECTION");
	}
	
	/**
	 * Gets the "Example" widget children's items, if any.
	 *
	 * @return an array containing the example widget children's items
	 */
	Item [] getExampleWidgetItems () {
		/* Note: We do not bother collecting the tree items
		 * because tree items don't have any events. If events
		 * are ever added to TreeItem, then this needs to change.
		 */
		Item [] columns1 = tree1.getColumns();
		Item [] columns2 = tree2.getColumns();
		Item [] allItems = new Item [columns1.length + columns2.length];
		System.arraycopy(columns1, 0, allItems, 0, columns1.length);
		System.arraycopy(columns2, 0, allItems, columns1.length, columns2.length);
		return allItems;
	}
	
	/**
	 * Gets the "Example" widget children.
	 */
	Control [] getExampleWidgets () {
		return new Control [] {tree1, tree2};
	}
	
	/**
	 * Returns a list of set/get API method names (without the set/get prefix)
	 * that can be used to set/get values in the example control(s).
	 */
	String[] getMethodNames() {
		return new String[] {"Selection", "TopItem"};
	}

	Object[] parameterForType(String typeName, String value, Control control) {
		if (typeName.equals("org.eclipse.swt.widgets.TreeItem")) {
			TreeItem item = findItem(value, ((Tree) control).getItems());
			if (item != null) return new Object[] {item};
		}
		if (typeName.equals("[Lorg.eclipse.swt.widgets.TreeItem;")) {
			String[] values = value.split(",");
			TreeItem[] items = new TreeItem[values.length];
			for (int i = 0; i < values.length; i++) {
				TreeItem item = findItem(values[i], ((Tree) control).getItems());
				if (item == null) break;
				items[i] = item;				
			}
			return new Object[] {items};
		}
		return super.parameterForType(typeName, value, control);
	}

	TreeItem findItem(String value, TreeItem[] items) {
		for (int i = 0; i < items.length; i++) {
			TreeItem item = items[i];
			if (item.getText().equals(value)) return item;
			item = findItem(value, item.getItems());
			if (item != null) return item;
		}
		return null;
	}

	/**
	 * Gets the text for the tab folder item.
	 */
	String getTabText () {
		return "Tree";
	}

	void packColumns (Tree tree) {
		if (multipleColumns.getSelection()) {
			int columnCount = tree.getColumnCount();
			for (int i = 0; i < columnCount; i++) {
				TreeColumn treeColumn = tree.getColumn(i);
				treeColumn.pack();
			}
		}
	}

	/**
	 * Sets the foreground color, background color, and font
	 * of the "Example" widgets to their default settings.
	 * Also sets foreground and background color of the Node 1
	 * TreeItems to default settings.
	 */
	void resetColorsAndFonts () {
		super.resetColorsAndFonts ();
		Color oldColor = itemForegroundColor;
		itemForegroundColor = null;
		setItemForeground ();
		if (oldColor != null) oldColor.dispose();
		oldColor = itemBackgroundColor;
		itemBackgroundColor = null;
		setItemBackground ();
		if (oldColor != null) oldColor.dispose();
		Font oldFont = font;
		itemFont = null;
		setItemFont ();
		setExampleWidgetSize ();
		if (oldFont != null) oldFont.dispose();
	}
	
	/**
	 * Sets the state of the "Example" widgets.
	 */
	void setExampleWidgetState () {
		super.setExampleWidgetState ();
		setItemBackground ();
		setItemForeground ();
		setItemFont ();
		setExampleWidgetSize ();
		setWidgetHeaderVisible ();
		setWidgetLinesVisible ();
		checkButton.setSelection ((tree1.getStyle () & SWT.CHECK) != 0);
		checkButton.setSelection ((tree2.getStyle () & SWT.CHECK) != 0);
		fullSelectionButton.setSelection ((tree1.getStyle () & SWT.FULL_SELECTION) != 0);
		fullSelectionButton.setSelection ((tree2.getStyle () & SWT.FULL_SELECTION) != 0);
	}
	
	/**
	 * Sets the background color of the Node 1 TreeItems.
	 */
	void setItemBackground () {
		textNode1.setBackground (itemBackgroundColor);
		imageNode1.setBackground (itemBackgroundColor);
		/* Set the background button's color to match the color just set. */
		Color color = itemBackgroundColor;
		if (color == null) color = textNode1.getBackground ();
		drawImage (itemBackgroundImage, color);
		itemBackgroundButton.setImage (itemBackgroundImage);
	}
	
	/**
	 * Sets the foreground color of the Node 1 TreeItems.
	 */
	void setItemForeground () {
		textNode1.setForeground (itemForegroundColor);
		imageNode1.setForeground (itemForegroundColor);
		/* Set the foreground button's color to match the color just set. */
		Color color = itemForegroundColor;
		if (color == null) color = textNode1.getForeground ();
		drawImage (itemForegroundImage, color);
		itemForegroundButton.setImage (itemForegroundImage);
	}
	
	/**
	 * Sets the font of the Node 1 TreeItems.
	 */
	void setItemFont () {
		if (instance.startup) return;
		textNode1.setFont (itemFont);
		imageNode1.setFont (itemFont);
	}

	/**
	 * Sets the header visible state of the "Example" widgets.
	 */
	void setWidgetHeaderVisible () {
		tree1.setHeaderVisible (headerVisibleButton.getSelection ());
		tree2.setHeaderVisible (headerVisibleButton.getSelection ());
	}
	
	/**
	 * Sets the lines visible state of the "Example" widgets.
	 */
	void setWidgetLinesVisible () {
		tree1.setLinesVisible (linesVisibleButton.getSelection ());
		tree2.setLinesVisible (linesVisibleButton.getSelection ());
	}
}