事件管理器 4个象限【还没有完成】

public class Coordinate {
	private void createArea(Composite parent) {
		SashForm top = new SashForm(parent, SWT.HORIZONTAL);// 定义一个分割窗容器
		top.setLayout(new FillLayout());
		Composite right = new Composite(top, SWT.NONE);
		Composite left = new Composite(top, SWT.NONE);
		top.setWeights(new int[] {1,2});
		right.setLayout(new FillLayout());
		left.setLayout(new FillLayout());
		new Text(right, SWT.BORDER|SWT.WRAP|SWT.V_SCROLL);
		
		SashForm x_coordinate = new SashForm(left, SWT.VERTICAL);// 定义一个分割窗容器
		x_coordinate.setLayout(new FillLayout());
		Composite comp1 = new Composite(x_coordinate, SWT.NONE);
		Composite comp2 = new Composite(x_coordinate, SWT.NONE);
		x_coordinate.setWeights(new int[] {1,1});

		comp1.setLayout(new FillLayout());
		comp2.setLayout(new FillLayout());
		final Composite y1_comp = new Composite(comp1, SWT.NONE);
		final Composite y2_comp = new Composite(comp2, SWT.NONE);
		final FormData sashData1 = new FormData(),sashData2 = new FormData();
		final Sash sash1,sash2;

		final Composite quadrant1,quadrant2,quadrant3,quadrant4;

		{
			quadrant1 = new Composite (y1_comp, SWT.NONE);
			sash1 = new Sash (y1_comp, SWT.VERTICAL);
			quadrant2 = new Composite (y1_comp, SWT.NONE);

			final FormLayout form = new FormLayout ();
			y1_comp.setLayout (form);

			FormData quadrant1Data = new FormData ();
			quadrant1Data.left = new FormAttachment (0, 0);
			quadrant1Data.right = new FormAttachment (sash1, 0);
			quadrant1Data.top = new FormAttachment (0, 0);
			quadrant1Data.bottom = new FormAttachment (100, 0);
			quadrant1.setLayoutData (quadrant1Data);

			int percent = 50;
			sashData1.left = new FormAttachment (percent, 0);
			sashData1.top = new FormAttachment (0, 0);
			sashData1.bottom = new FormAttachment (100, 0);
			sash1.setLayoutData (sashData1);

			FormData quadrant2Data = new FormData ();
			quadrant2Data.left = new FormAttachment (sash1, 0);
			quadrant2Data.right = new FormAttachment (100, 0);
			quadrant2Data.top = new FormAttachment (0, 0);
			quadrant2Data.bottom = new FormAttachment (100, 0);
			quadrant2.setLayoutData (quadrant2Data);
		}

		{
			quadrant3 = new Composite (y2_comp, SWT.NONE);
			sash2 = new Sash (y2_comp, SWT.VERTICAL);
			quadrant4 = new Composite (y2_comp, SWT.NONE);

			final FormLayout form = new FormLayout ();
			y2_comp.setLayout (form);

			FormData quadrant3Data = new FormData ();
			quadrant3Data.left = new FormAttachment (0, 0);
			quadrant3Data.right = new FormAttachment (sash2, 0);
			quadrant3Data.top = new FormAttachment (0, 0);
			quadrant3Data.bottom = new FormAttachment (100, 0);
			quadrant3.setLayoutData (quadrant3Data);

			int percent = 50;
			sashData2.left = new FormAttachment (percent, 0);
			sashData2.top = new FormAttachment (0, 0);
			sashData2.bottom = new FormAttachment (100, 0);
			sash2.setLayoutData (sashData2);

			FormData quadrant4Data = new FormData ();
			quadrant4Data.left = new FormAttachment (sash2, 0);
			quadrant4Data.right = new FormAttachment (100, 0);
			quadrant4Data.top = new FormAttachment (0, 0);
			quadrant4Data.bottom = new FormAttachment (100, 0);
			quadrant4.setLayoutData (quadrant4Data);
		}

		final double[] ratio = new double[]{0.5};
		final int limit = 20;
		Listener listener = new Listener () {
			Rectangle sashRect,shellRect;
			public void handleEvent (Event e) {
				if(sash1 == e.widget) {
					sashRect = sash1.getBounds ();
					shellRect = y1_comp.getClientArea ();
				} else {
					sashRect = sash2.getBounds ();
					shellRect = y2_comp.getClientArea ();
				}

				//right限制了 left的最大值（为103）这里可以提出去，免得不断地调用，噢，不行，shell有可能变大。 
				//limit限制了 left的最小值（为20）
				int right = shellRect.width - sashRect.width - limit;
				e.x = Math.max (Math.min (e.x, right), limit);
				if (e.x != sashRect.x) {
					sashData2.left = new FormAttachment (0, e.x);
					y2_comp.layout ();
					sashData1.left = new FormAttachment (0, e.x);
					y1_comp.layout ();
				}
				if(shellRect.width != 0) {
					ratio[0] = (double)e.x/(shellRect.width);
				}
			}
		};
		sash1.addListener (SWT.Selection, listener);
		sash2.addListener (SWT.Selection, listener);
		parent.addControlListener(new ControlAdapter() {
			Rectangle shellRect,sashRect;
			public void controlResized(ControlEvent e) {
				shellRect = y1_comp.getClientArea ();
				sashRect = sash1.getBounds ();

				if(shellRect.width != 0) {
					int right = (int) (ratio[0] * shellRect.width);
					right = Math.max (Math.min(right,shellRect.width - sashRect.width - limit), limit);
					sashData2.left = new FormAttachment (0, right);
					y2_comp.layout ();
					sashData1.left = new FormAttachment (0, right);
					y1_comp.layout ();
				}
			}
		});

		createArea4quadrant1234(quadrant1,quadrant2,quadrant3,quadrant4);
	}

	private void createArea4quadrant1234(Composite quadrant1, Composite quadrant2, Composite quadrant3, Composite quadrant4) {
		quadrant1.setLayout(new FillLayout());
		quadrant2.setLayout(new FillLayout());
		quadrant3.setLayout(new FillLayout());
		quadrant4.setLayout(new FillLayout());
		
		Text text1 = new Text(quadrant2,SWT.BORDER | SWT.WRAP|SWT.V_SCROLL);
		text1.setText("quadrant1");
		Text text2 = new Text(quadrant1,SWT.BORDER | SWT.WRAP|SWT.V_SCROLL);
		text2.setText("quadrant2");
		Text text3 = new Text(quadrant3,SWT.BORDER | SWT.WRAP|SWT.V_SCROLL);
		text3.setText("quadrant3");
		Text text4 = new Text(quadrant4,SWT.BORDER | SWT.WRAP|SWT.V_SCROLL);
		text4.setText("quadrant4");
		
		text1.setToolTipText("重要紧急");
		text2.setToolTipText("不重要紧急");
		text3.setToolTipText("不重要不紧急");
		text4.setToolTipText("重要不紧急");
		text1.setText("重要紧急");
		text2.setText("不重要紧急");
		text3.setText("不重要不紧急");
		text4.setText("重要不紧急");
		

	}

	private void open() {
		Display display = Display.getDefault();
		Shell shell = new Shell();
		shell.setLayout(new FillLayout());
		// ---------创建窗口中的其他界面组件-------------
		createArea(shell);
		// -----------------END------------------------
		shell.setSize(800, 600);
		shell.layout();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

	public static void main(String[] args) {
		new Coordinate().open();
	}
}