tab.java

SUN公司eclipse3.2.2经典例子

			typeName = returnType.getName();
		}
		String typeNameString = typeName;
		int index = typeName.lastIndexOf('.');
		if (index != -1 && index+1 < typeName.length()) typeNameString = typeName.substring(index+1);
		String info = ControlExample.getResourceString("Info_" + typeNameString + (isArray ? "A" : ""));
		if (isArray) {
			typeNameString += "[]";
		}
		return ControlExample.getResourceString("Parameter_Info", new Object[] {typeNameString, info});
	}

	void getValue() {
		String methodName = "get" + nameCombo.getText();
		getText.setText("");
		Widget[] widgets = getExampleWidgets();
		for (int i = 0; i < widgets.length; i++) {
			try {
				java.lang.reflect.Method method = widgets[i].getClass().getMethod(methodName, null);
				Object result = method.invoke(widgets[i], null);
				if (result == null) {
					getText.append("null");
				} else if (result.getClass().isArray()) {
					int length = java.lang.reflect.Array.getLength(result);
					if (length == 0) {
						getText.append(result.getClass().getComponentType() + "[0]");
					}
					for (int j = 0; j < length; j++) {
						getText.append(java.lang.reflect.Array.get(result,j).toString() + "\n");
					}
				} else {
					getText.append(result.toString());
				}
			} catch (Exception e) {
				getText.append(e.toString());
			}
			if (i + 1 < widgets.length) {
				getText.append("\n\n");
			}
		}
	}

	Class getReturnType(String methodRoot) {
		Class returnType = null;
		String methodName = "get" + methodRoot;
		Widget[] widgets = getExampleWidgets();
		try {
			java.lang.reflect.Method method = widgets[0].getClass().getMethod(methodName, null);
			returnType = method.getReturnType();
		} catch (Exception e) {
		}
		return returnType;
	}
	
	void setValue() {
		/* The parameter type must be the same as the get method's return type */
		String methodRoot = nameCombo.getText();
		Class returnType = getReturnType(methodRoot);
		String methodName = setMethodName(methodRoot);
		String value = setText.getText();
		Widget[] widgets = getExampleWidgets();
		for (int i = 0; i < widgets.length; i++) {
			try {
				java.lang.reflect.Method method = widgets[i].getClass().getMethod(methodName, new Class[] {returnType});
				String typeName = returnType.getName();
				Object[] parameter = null;
				if (typeName.equals("int")) {
					parameter = new Object[] {new Integer(value)};
				} else if (typeName.equals("long")) {
					parameter = new Object[] {new Long(value)};
				} else if (typeName.equals("char")) {
					parameter = new Object[] {value.length() == 1 ? new Character(value.charAt(0)) : new Character('\0')};
				} else if (typeName.equals("boolean")) {
					parameter = new Object[] {new Boolean(value)};
				} else if (typeName.equals("java.lang.String")) {
					parameter = new Object[] {value};
				} else if (typeName.equals("org.eclipse.swt.graphics.Point")) {
					String xy[] = split(value, ',');
					parameter = new Object[] {new Point(new Integer(xy[0]).intValue(),new Integer(xy[1]).intValue())};
				} else if (typeName.equals("[I")) {
					String strings[] = split(value, ',');
					int[] ints = new int[strings.length];
					for (int j = 0; j < strings.length; j++) {
						ints[j] = new Integer(strings[j]).intValue();
					}
					parameter = new Object[] {ints};
				} else if (typeName.equals("[Ljava.lang.String;")) {
					parameter = new Object[] {split(value, ',')};
				} else {
					parameter = parameterForType(typeName, value, widgets[i]);
				}
				method.invoke(widgets[i], parameter);
			} catch (Exception e) {
				getText.setText(e.toString());
			}
		}
	}

	Object[] parameterForType(String typeName, String value, Widget widget) {
		return new Object[] {value};
	}

	void createOrientationGroup () {
		/* Create Orientation group*/
		orientationGroup = new Group (controlGroup, SWT.NONE);
		orientationGroup.setLayout (new GridLayout());
		orientationGroup.setLayoutData (new GridData (SWT.FILL, SWT.FILL, false, false));
		orientationGroup.setText (ControlExample.getResourceString("Orientation"));
		defaultOrietationButton = new Button (orientationGroup, SWT.RADIO);
		defaultOrietationButton.setText (ControlExample.getResourceString("Default"));
		defaultOrietationButton.setSelection (true);
		ltrButton = new Button (orientationGroup, SWT.RADIO);
		ltrButton.setText ("SWT.LEFT_TO_RIGHT");
		rtlButton = new Button (orientationGroup, SWT.RADIO);
		rtlButton.setText ("SWT.RIGHT_TO_LEFT");
	}
	
	/**
	 * Creates the "Size" group.  The "Size" group contains
	 * controls that allow the user to change the size of
	 * the example widgets.
	 */
	void createSizeGroup () {
		/* Create the group */
		sizeGroup = new Group (controlGroup, SWT.NONE);
		sizeGroup.setLayout (new GridLayout());
		sizeGroup.setLayoutData (new GridData (SWT.FILL, SWT.FILL, false, false));
		sizeGroup.setText (ControlExample.getResourceString("Size"));
	
		/* Create the controls */
	
		/*
		 * The preferred size of a widget is the size returned
		 * by widget.computeSize (SWT.DEFAULT, SWT.DEFAULT).
		 * This size is defined on a widget by widget basis.
		 * Many widgets will attempt to display their contents.
		 */
		preferredButton = new Button (sizeGroup, SWT.RADIO);
		preferredButton.setText (ControlExample.getResourceString("Preferred"));
		tooSmallButton = new Button (sizeGroup, SWT.RADIO);
		tooSmallButton.setText (TOO_SMALL_SIZE + " X " + TOO_SMALL_SIZE);
		smallButton = new Button(sizeGroup, SWT.RADIO);
		smallButton.setText (SMALL_SIZE + " X " + SMALL_SIZE);
		largeButton = new Button (sizeGroup, SWT.RADIO);
		largeButton.setText (LARGE_SIZE + " X " + LARGE_SIZE);
		fillHButton = new Button (sizeGroup, SWT.CHECK);
		fillHButton.setText (ControlExample.getResourceString("Fill_X"));
		fillVButton = new Button (sizeGroup, SWT.CHECK);
		fillVButton.setText (ControlExample.getResourceString("Fill_Y"));
		
		/* Add the listeners */
		SelectionAdapter selectionListener = new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				setExampleWidgetSize ();
			}
		};
		preferredButton.addSelectionListener(selectionListener);
		tooSmallButton.addSelectionListener(selectionListener);
		smallButton.addSelectionListener(selectionListener);
		largeButton.addSelectionListener(selectionListener);
		fillHButton.addSelectionListener(selectionListener);
		fillVButton.addSelectionListener(selectionListener);
	
		/* Set the default state */
		preferredButton.setSelection (true);
	}
	
	/**
	 * Creates the "Style" group.  The "Style" group contains
	 * controls that allow the user to change the style of
	 * the example widgets.  Changing a widget "Style" causes
	 * the widget to be destroyed and recreated.
	 */
	void createStyleGroup () {
		styleGroup = new Group (controlGroup, SWT.NONE);
		styleGroup.setLayout (new GridLayout ());
		styleGroup.setLayoutData (new GridData (SWT.FILL, SWT.FILL, false, false));
		styleGroup.setText (ControlExample.getResourceString("Styles"));
	}
	
	/**
	 * Creates the tab folder page.
	 *
	 * @param tabFolder org.eclipse.swt.widgets.TabFolder
	 * @return the new page for the tab folder
	 */
	Composite createTabFolderPage (TabFolder tabFolder) {
		/* Cache the shell and display. */
		shell = tabFolder.getShell ();
		display = shell.getDisplay ();
		
		/* Create a two column page. */
		tabFolderPage = new Composite (tabFolder, SWT.NONE);
		tabFolderPage.setLayout (new GridLayout (2, false));
	
		/* Create the "Example" and "Control" groups. */
		createExampleGroup ();
		createControlGroup ();
		
		/* Create the "Listeners" group under the "Control" group. */
		createListenersGroup ();
		
		/* Create and initialize the example and control widgets. */
		createExampleWidgets ();
		hookExampleWidgetListeners ();
		createControlWidgets ();
		createBackgroundModeGroup ();
		setExampleWidgetState ();
		
		return tabFolderPage;
	}
	
	void setExampleWidgetPopupMenu() {
		Control[] controls = getExampleControls();
		for (int i = 0; i < controls.length; i++) {
			final Control control = controls [i];
			control.addListener(SWT.MenuDetect, new Listener() {
				public void handleEvent(Event event) {
		        	Menu menu = control.getMenu();
		        	if (menu != null && samplePopup) {
		        		menu.dispose();
		        		menu = null;
		        	}
		        	if (menu == null && popupMenuButton.getSelection()) {
			        	menu = new Menu(shell, SWT.POP_UP);
			        	MenuItem item = new MenuItem(menu, SWT.PUSH);
			        	item.setText("Sample popup menu item");
			        	specialPopupMenuItems(menu, event);
			        	control.setMenu(menu);
		        		samplePopup = true;
		        	}
				}
			});
		}
	}

	protected void specialPopupMenuItems(final Menu menu, final Event event) {
	}

	/**
	 * Disposes the "Example" widgets.
	 */
	void disposeExampleWidgets () {
		Widget [] widgets = getExampleWidgets ();
		for (int i=0; i<widgets.length; i++) {
			widgets [i].dispose ();
		}
	}
	
	Image colorImage (Color color) {
		Image image = new Image (display, IMAGE_SIZE, IMAGE_SIZE);
		GC gc = new GC(image);
		gc.setBackground(color);
		Rectangle bounds = image.getBounds();
		gc.fillRectangle(0, 0, bounds.width, bounds.height);
		gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
		gc.drawRectangle(0, 0, bounds.width - 1, bounds.height - 1);
		gc.dispose();
		return image;
	}
	
	Image fontImage (Font font) {
		Image image = new Image (display, IMAGE_SIZE, IMAGE_SIZE);
		GC gc = new GC(image);
		Rectangle bounds = image.getBounds();
		gc.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
		gc.fillRectangle(0, 0, bounds.width, bounds.height);
		gc.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
		gc.drawRectangle(0, 0, bounds.width - 1, bounds.height - 1);
		FontData data[] = font.getFontData();
		int style = data[0].getStyle();
		switch (style) {
		case SWT.NORMAL:
			gc.drawLine(3, 3, 3, 8);
			gc.drawLine(4, 3, 7, 8);
			gc.drawLine(8, 3, 8, 8);
			break;
		case SWT.BOLD:
			gc.drawLine(3, 2, 3, 9);
			gc.drawLine(4, 2, 4, 9);
			gc.drawLine(5, 2, 7, 2);
			gc.drawLine(5, 3, 8, 3);
			gc.drawLine(5, 5, 7, 5);
			gc.drawLine(5, 6, 7, 6);
			gc.drawLine(5, 8, 8, 8);
			gc.drawLine(5, 9, 7, 9);
			gc.drawLine(7, 4, 8, 4);
			gc.drawLine(7, 7, 8, 7);
			break;
		case SWT.ITALIC:
			gc.drawLine(6, 2, 8, 2);
			gc.drawLine(7, 3, 4, 8);
			gc.drawLine(3, 9, 5, 9);
			break;
		case SWT.BOLD | SWT.ITALIC:
			gc.drawLine(5, 2, 8, 2);
			gc.drawLine(5, 3, 8, 3);
			gc.drawLine(6, 4, 4, 7);
			gc.drawLine(7, 4, 5, 7);
			gc.drawLine(3, 8, 6, 8);
			gc.drawLine(3, 9, 6, 9);
			break;
		}
		gc.dispose();
		return image;
	}
	
	/**
	 * Gets the list of custom event names.
	 * 
	 * @return an array containing custom event names
	 */
	String [] getCustomEventNames () {
		return new String [0];
	}
	
	/**
	 * Gets the default style for a widget
	 *
	 * @return the default style bit
	 */
	int getDefaultStyle () {
		if (ltrButton != null && ltrButton.getSelection()) {
			return SWT.LEFT_TO_RIGHT;
		}
		if (rtlButton != null && rtlButton.getSelection()) {
			return SWT.RIGHT_TO_LEFT;
		}
		return SWT.NONE;
	}
	
	/**
	 * Gets the "Example" widgets.
	 *
	 * @return an array containing the example widgets
	 */
	Widget [] getExampleWidgets () {
		return new Widget [0];
	}
	
	/**
	 * Gets the "Example" controls.
	 * This is the subset of "Example" widgets that are controls.
	 *
	 * @return an array containing the example controls
	 */
	Control [] getExampleControls () {
		Widget [] widgets = getExampleWidgets ();
		Control [] controls = new Control [0];
		for (int i = 0; i < widgets.length; i++) {
			if (widgets[i] instanceof Control) {
				Control[] newControls = new Control[controls.length + 1];
				System.arraycopy(controls, 0, newControls, 0, controls.length);
				controls = newControls;
				controls[controls.length - 1] = (Control)widgets[i];
			}
		}
		return controls;
	}
	
	/**
	 * Gets the "Example" widget children's items, if any.
	 *
	 * @return an array containing the example widget children's items
	 */