tab.java

SUN公司eclipse3.2.2经典例子

	Item [] getExampleWidgetItems () {
		return new Item [0];
	}
	
	/**
	 * Gets the short text for the tab folder item.
	 *
	 * @return the short text for the tab item
	 */
	String getShortTabText() {
		return getTabText();
	}

	/**
	 * Gets the text for the tab folder item.
	 *
	 * @return the text for the tab item
	 */
	String getTabText () {
		return "";
	}
	
	/**
	 * Hooks all listeners to all example controls
	 * and example control items.
	 */
	void hookExampleWidgetListeners () {
		if (logging) {
			Widget[] widgets = getExampleWidgets ();
			for (int i = 0; i < widgets.length; i++) {
				hookListeners (widgets [i]);
			}
			Item[] exampleItems = getExampleWidgetItems ();
			for (int i = 0; i < exampleItems.length; i++) {
				hookListeners (exampleItems [i]);
			}
			String [] customNames = getCustomEventNames ();
			for (int i = 0; i < customNames.length; i++) {
				if (eventsFilter [EVENT_NAMES.length + i]) hookCustomListener (customNames[i]);
			}
		}
	}
	
	/**
	 * Hooks the custom listener specified by eventName.
	 */
	void hookCustomListener (String eventName) {
	}
	
	/**
	 * Hooks all listeners to the specified widget.
	 */
	void hookListeners (Widget widget) {
		if (logging) {
			Listener listener = new Listener() {
				public void handleEvent (Event event) {
					log (event);
				}
			};
			for (int i = 0; i < EVENT_NAMES.length; i++) {
				if (eventsFilter [i]) widget.addListener (((Integer)EVENT_NAMES[i][1]).intValue(), listener);
			}
		}
	}
	
	/**
	 * Logs an untyped event to the event console.
	 */
	void log(Event event) {
		int i = 0;
		while (i < EVENT_NAMES.length) {
			if (((Integer)EVENT_NAMES[i][1]).intValue() == event.type) break;
			i++;
		}
		String toString = (String)EVENT_NAMES[i][0] + " ["+event.type+"]: ";
		switch (event.type) {
			case SWT.KeyDown:
			case SWT.KeyUp: toString += new KeyEvent (event).toString (); break;
			case SWT.MouseDown:
			case SWT.MouseUp:
			case SWT.MouseMove:
			case SWT.MouseEnter:
			case SWT.MouseExit:
			case SWT.MouseDoubleClick:
			case SWT.MouseWheel: 
			case SWT.MouseHover: toString += new MouseEvent (event).toString (); break;
			case SWT.Paint: toString += new PaintEvent (event).toString (); break;
			case SWT.Move:
			case SWT.Resize: toString += new ControlEvent (event).toString (); break;
			case SWT.Dispose: toString += new DisposeEvent (event).toString (); break;
			case SWT.Selection:
			case SWT.DefaultSelection: toString += new SelectionEvent (event).toString (); break;
			case SWT.FocusIn:
			case SWT.FocusOut: toString += new FocusEvent (event).toString (); break;
			case SWT.Expand:
			case SWT.Collapse: toString += new TreeEvent (event).toString (); break;
			case SWT.Iconify:
			case SWT.Deiconify:
			case SWT.Close:
			case SWT.Activate:
			case SWT.Deactivate: toString += new ShellEvent (event).toString (); break;
			case SWT.Show:
			case SWT.Hide: toString += (event.widget instanceof Menu) ? new MenuEvent (event).toString () : event.toString(); break;
			case SWT.Modify: toString += new ModifyEvent (event).toString (); break;
			case SWT.Verify: toString += new VerifyEvent (event).toString (); break;
			case SWT.Help: toString += new HelpEvent (event).toString (); break;
			case SWT.Arm: toString += new ArmEvent (event).toString (); break;
			case SWT.Traverse: toString += new TraverseEvent (event).toString (); break;
			case SWT.HardKeyDown:
			case SWT.HardKeyUp:
			case SWT.DragDetect:
			case SWT.MenuDetect:
			case SWT.SetData:
			default: toString += event.toString ();
		}
		eventConsole.append (toString);
		eventConsole.append ("\n");
	}
	
	/**
	 * Logs a string to the event console.
	 */
	void log (String string) {
		eventConsole.append (string);
		eventConsole.append ("\n");
	}

	/**
	 * Logs a typed event to the event console.
	 */
	void log (String eventName, TypedEvent event) {
		eventConsole.append (eventName + ": ");
		eventConsole.append (event.toString ());
		eventConsole.append ("\n");
	}
	
	/**
	 * Recreates the "Example" widgets.
	 */
	void recreateExampleWidgets () {
		disposeExampleWidgets ();
		createExampleWidgets ();
		hookExampleWidgetListeners ();
		setExampleWidgetState ();
	}
	
	/**
	 * Sets the foreground color, background color, and font
	 * of the "Example" widgets to their default settings.
	 * Subclasses may extend in order to reset other colors
	 * and fonts to default settings as well.
	 */
	void resetColorsAndFonts () {
		Color oldColor = foregroundColor;
		foregroundColor = null;
		setExampleWidgetForeground ();
		if (oldColor != null) oldColor.dispose();
		oldColor = backgroundColor;
		backgroundColor = null;
		setExampleWidgetBackground ();
		if (oldColor != null) oldColor.dispose();
		Font oldFont = font;
		font = null;
		setExampleWidgetFont ();
		setExampleWidgetSize ();
		if (oldFont != null) oldFont.dispose();
	}
	
	/**
	 * Sets the background color of the "Example" widgets' parent.
	 */
	void setExampleGroupBackgroundColor () {
		if (backgroundModeGroup == null) return;
		exampleGroup.setBackground (backgroundModeColorButton.getSelection () ? display.getSystemColor(SWT.COLOR_BLUE) : null);
	}
	/**
	 * Sets the background image of the "Example" widgets' parent.
	 */
	void setExampleGroupBackgroundImage () {
		if (backgroundModeGroup == null) return;
		exampleGroup.setBackgroundImage (backgroundModeImageButton.getSelection () ? instance.images[ControlExample.ciParentBackground] : null);
	}

	/**
	 * Sets the background mode of the "Example" widgets' parent.
	 */
	void setExampleGroupBackgroundMode () {
		if (backgroundModeGroup == null) return;
		String modeString = backgroundModeCombo.getText ();
		int mode = SWT.INHERIT_NONE;
		if (modeString.equals("SWT.INHERIT_DEFAULT")) mode = SWT.INHERIT_DEFAULT;
		if (modeString.equals("SWT.INHERIT_FORCE")) mode = SWT.INHERIT_FORCE;
		exampleGroup.setBackgroundMode (mode);
	}

	/**
	 * Sets the background color of the "Example" widgets.
	 */
	void setExampleWidgetBackground () {
		if (colorAndFontTable == null) return; // user cannot change color/font on this tab
		Control [] controls = getExampleControls ();
		if (!instance.startup) {
			for (int i = 0; i < controls.length; i++) {
				controls[i].setBackground (backgroundColor);
			}
		}
		// Set the background color item's image to match the background color of the example widget(s).
		Color color = backgroundColor;
		if (controls.length == 0) return;
		if (color == null) color = controls [0].getBackground ();
		TableItem item = colorAndFontTable.getItem(BACKGROUND_COLOR);
		Image oldImage = item.getImage();
		if (oldImage != null) oldImage.dispose();
		item.setImage (colorImage (color));
	}
	
	/**
	 * Sets the enabled state of the "Example" widgets.
	 */
	void setExampleWidgetEnabled () {
		Control [] controls = getExampleControls ();
		for (int i=0; i<controls.length; i++) {
			controls [i].setEnabled (enabledButton.getSelection ());
		}
	}
	
	/**
	 * Sets the font of the "Example" widgets.
	 */
	void setExampleWidgetFont () {
		if (colorAndFontTable == null) return; // user cannot change color/font on this tab
		Control [] controls = getExampleControls ();
		if (!instance.startup) {
			for (int i = 0; i < controls.length; i++) {
				controls[i].setFont(font);
			}
		}
		/* Set the font item's image and font to match the font of the example widget(s). */
		Font ft = font;
		if (controls.length == 0) return;
		if (ft == null) ft = controls [0].getFont ();
		TableItem item = colorAndFontTable.getItem(FONT);
		Image oldImage = item.getImage();
		if (oldImage != null) oldImage.dispose();
		item.setImage (fontImage (ft));
		item.setFont(ft);
		colorAndFontTable.layout ();
	}
	
	/**
	 * Sets the foreground color of the "Example" widgets.
	 */
	void setExampleWidgetForeground () {
		if (colorAndFontTable == null) return; // user cannot change color/font on this tab
		Control [] controls = getExampleControls ();
		if (!instance.startup) {
			for (int i = 0; i < controls.length; i++) {
				controls[i].setForeground (foregroundColor);
			}
		}
		/* Set the foreground color item's image to match the foreground color of the example widget(s). */
		Color color = foregroundColor;
		if (controls.length == 0) return;
		if (color == null) color = controls [0].getForeground ();
		TableItem item = colorAndFontTable.getItem(FOREGROUND_COLOR);
		Image oldImage = item.getImage();
		if (oldImage != null) oldImage.dispose();
		item.setImage (colorImage(color));
	}
	
	/**
	 * Sets the size of the "Example" widgets.
	 */
	void setExampleWidgetSize () {
		int size = SWT.DEFAULT;
		if (preferredButton == null) return;
		if (preferredButton.getSelection()) size = SWT.DEFAULT;
		if (tooSmallButton.getSelection()) size = TOO_SMALL_SIZE;
		if (smallButton.getSelection()) size = SMALL_SIZE;
		if (largeButton.getSelection()) size = LARGE_SIZE;
		Control [] controls = getExampleControls ();
		for (int i=0; i<controls.length; i++) {
			GridData gridData = new GridData(size, size); 
			gridData.grabExcessHorizontalSpace = fillHButton.getSelection();
			gridData.grabExcessVerticalSpace = fillVButton.getSelection();
			gridData.horizontalAlignment = fillHButton.getSelection() ? SWT.FILL : SWT.LEFT;
			gridData.verticalAlignment = fillVButton.getSelection() ? SWT.FILL : SWT.TOP;
			controls [i].setLayoutData (gridData);
		}
		tabFolderPage.layout (controls);
	}
	
	/**
	 * Sets the state of the "Example" widgets.  Subclasses
	 * reimplement this method to set "Example" widget state
	 * that is specific to the widget.
	 */
	void setExampleWidgetState () {
		setExampleWidgetBackground ();
		setExampleWidgetForeground ();
		setExampleWidgetFont ();
		if (!instance.startup) {
			setExampleWidgetEnabled ();
			setExampleWidgetVisibility ();
			setExampleGroupBackgroundMode ();
			setExampleGroupBackgroundColor ();
			setExampleGroupBackgroundImage ();
			setExampleWidgetBackgroundImage ();
			setExampleWidgetPopupMenu ();
			setExampleWidgetSize ();
		}
		//TEMPORARY CODE
//		Control [] controls = getExampleControls ();
//		for (int i=0; i<controls.length; i++) {
//			log ("Control=" + controls [i] + ", border width=" + controls [i].getBorderWidth ());
//		}
	}
	
	/**
	 * Sets the visibility of the "Example" widgets.
	 */
	void setExampleWidgetVisibility () {
		Control [] controls = getExampleControls ();
		for (int i=0; i<controls.length; i++) {
			controls [i].setVisible (visibleButton.getSelection ());
		}
	}

	/**
	 * Sets the background image of the "Example" widgets.
	 */
	void setExampleWidgetBackgroundImage () {
		Control [] controls = getExampleControls ();
		for (int i=0; i<controls.length; i++) {
			controls [i].setBackgroundImage (backgroundImageButton.getSelection () ? instance.images[ControlExample.ciBackground] : null);
		}
	}
	
	/**
	 * Splits the given string around matches of the given character.
	 * 
	 * This subset of java.lang.String.split(String regex)
	 * uses only code that can be run on CLDC platforms.
	 */
	String [] split (String string, char ch) {
		String [] result = new String[0];
		int start = 0;
		int length = string.length();
		while (start < length) {
			int end = string.indexOf(ch, start);
			if (end == -1) end = length;
			String substr = string.substring(start, end);
			String [] newResult = new String[result.length + 1];
			System.arraycopy(result, 0, newResult, 0, result.length);
			newResult [result.length] = substr;
			result = newResult;
			start = end + 1;
		}
		return result;
	}
}