SWT树也可以支持列 列的顺序可以随时变

原来程序：Snippet170

 

代码：

public class Snippet170 {
	public static void main(String[] args) {
		Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		Tree tree = new Tree(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
		tree.setHeaderVisible(true);
		TreeColumn column1 = new TreeColumn(tree, SWT.LEFT);
		column1.setText("Column 1");
		column1.setWidth(200);
		TreeColumn column2 = new TreeColumn(tree, SWT.CENTER);
		column2.setText("Column 2");
		column2.setWidth(200);
		TreeColumn column3 = new TreeColumn(tree, SWT.RIGHT);
		column3.setText("Column 3");
		column3.setWidth(200);
		for (int i = 0; i < 4; i++) {
			TreeItem item = new TreeItem(tree, SWT.NONE);
			item.setText(new String[] { "item " + i, "abc", "defghi" });
			for (int j = 0; j < 4; j++) {
				TreeItem subItem = new TreeItem(item, SWT.NONE);
				subItem.setText(new String[] { "subitem " + j, "jklmnop", "qrs" });
				for (int k = 0; k < 4; k++) {
					TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
					subsubItem.setText(new String[] { "subsubitem " + k, "tuv", "wxyz" });
				}
			}
		}
		shell.pack();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
		display.dispose();
	}
}

 

 

结果：

 

 

2，变化列的顺序，0，1，2，3，4变成4，3，2，1，0.

代码：

public class Snippet193 {
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new RowLayout(SWT.HORIZONTAL));
		final Tree tree = new Tree(shell, SWT.BORDER | SWT.CHECK);
		tree.setLayoutData(new RowData(-1, 300));
		tree.setHeaderVisible(true);
		TreeColumn column = new TreeColumn(tree, SWT.LEFT);
		column.setText("Column 0");
		column = new TreeColumn(tree, SWT.CENTER);
		column.setText("Column 1");
		column = new TreeColumn(tree, SWT.LEFT);
		column.setText("Column 2");
		column = new TreeColumn(tree, SWT.RIGHT);
		column.setText("Column 3");
		column = new TreeColumn(tree, SWT.CENTER);
		column.setText("Column 4");
		for (int i = 0; i < 5; i++) {
			TreeItem item = new TreeItem(tree, SWT.NONE);
			String[] text = new String[]{i+":0", i+":1", i+":2", i+":3", i+":4"};
			item.setText(text);
			for (int j = 0; j < 5; j++) {
				TreeItem subItem = new TreeItem(item, SWT.NONE);
				text = new String[]{i+","+j+":0", i+","+j+":1", i+","+j+":2", i+","+j+":3", i+","+j+":4"};
				subItem.setText(text);
				for (int k = 0; k < 5; k++) {
					TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
					text = new String[]{i+","+j+","+k+":0", i+","+j+","+k+":1", i+","+j+","+k+":2", i+","+j+","+k+":3", i+","+j+","+k+":4"};
					subsubItem.setText(text);
				}
			}
		}
		Listener listener = new Listener() {
			public void handleEvent(Event e) {
				System.out.println("Move "+e.widget);
			}
		};
		TreeColumn[] columns = tree.getColumns();
		for (int i = 0; i < columns.length; i++) {
			columns[i].setWidth(100);
			columns[i].setMoveable(true);
			columns[i].addListener(SWT.Move, listener);
		}
		Button b = new Button(shell, SWT.PUSH);
		b.setText("invert column order");
		b.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event e) {
				int[] order = tree.getColumnOrder();
				for (int i = 0; i < order.length/2; i++) {
					int temp = order[i];
					order[i] = order[order.length-i-1];
					order[order.length-i-1] = temp;
				}
				tree.setColumnOrder(order);
			}
		});
		shell.pack();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}