ctabfolder.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

		public void getDefaultAction(AccessibleControlEvent e) {
			String action = null;
			int childID = e.childID;
			if (childID >= 0 && childID < items.length) {
				action = "Switch"; //$NON-NLS-1$
			}
			e.result = action;
		}

		public void getFocus(AccessibleControlEvent e) {
			int childID = ACC.CHILDID_NONE;
			if (isFocusControl()) {
				if (selectedIndex == -1) {
					childID = ACC.CHILDID_SELF;
				} else {
					childID = selectedIndex;
				}
			}
			e.childID = childID;
		}

		public void getRole(AccessibleControlEvent e) {
			int role = 0;
			int childID = e.childID;
			if (childID == ACC.CHILDID_SELF) {
				role = ACC.ROLE_TABFOLDER;
			} else if (childID >= 0 && childID < items.length) {
				role = ACC.ROLE_TABITEM;
			}
			e.detail = role;
		}
		
		public void getSelection(AccessibleControlEvent e) {
			e.childID = (selectedIndex == -1) ? ACC.CHILDID_NONE : selectedIndex;
		}
		
		public void getState(AccessibleControlEvent e) {
			int state = 0;
			int childID = e.childID;
			if (childID == ACC.CHILDID_SELF) {
				state = ACC.STATE_NORMAL;
			} else if (childID >= 0 && childID < items.length) {
				state = ACC.STATE_SELECTABLE;
				if (isFocusControl()) {
					state |= ACC.STATE_FOCUSABLE;
				}
				if (selectedIndex == childID) {
					state |= ACC.STATE_SELECTED;
					if (isFocusControl()) {
						state |= ACC.STATE_FOCUSED;
					}
				}
			}
			e.detail = state;
		}
		
		public void getChildren(AccessibleControlEvent e) {
			Object[] children = new Object[items.length];
			for (int i = 0; i < items.length; i++) {
				children[i] = new Integer(i);
			}
			e.children = children;
		}
	});
	
	addListener(SWT.Selection, new Listener() {
		public void handleEvent(Event event) {
			if (isFocusControl()) {
				if (selectedIndex == -1) {
					accessible.setFocus(ACC.CHILDID_SELF);
				} else {
					accessible.setFocus(selectedIndex);
				}
			}
		}
	});

	addListener(SWT.FocusIn, new Listener() {
		public void handleEvent(Event event) {
			if (selectedIndex == -1) {
				accessible.setFocus(ACC.CHILDID_SELF);
			} else {
				accessible.setFocus(selectedIndex);
			}
		}
	});
}
void onKeyDown (Event event) {
	switch (event.keyCode) {
		case SWT.ARROW_LEFT:
		case SWT.ARROW_RIGHT:
			int count = items.length;
			if (count == 0) return;
			if (selectedIndex  == -1) return;
			int leadKey = (getStyle() & SWT.RIGHT_TO_LEFT) != 0 ? SWT.ARROW_RIGHT : SWT.ARROW_LEFT;
			int offset =  event.keyCode == leadKey ? -1 : 1;
			int index = selectedIndex + offset;
			if (index < 0 || index >= count) return;
			setSelection (index, true);
			forceFocus();
	}
}
void onDispose() {
	/*
	 * Usually when an item is disposed, destroyItem will change the size of the items array, 
	 * reset the bounds of all the tabs and manage the widget associated with the tab.
	 * Since the whole folder is being disposed, this is not necessary.  For speed
	 * the inDispose flag is used to skip over this part of the item dispose.
	 */
	inDispose = true;
	
	int length = items.length;
	for (int i = 0; i < length; i++) {						
		if (items[i] != null) {
			items[i].dispose();
		}
	}
	
	selectionGradientColors = null;
	selectionGradientPercents = null;
	selectionBgImage = null;

	selectionBackground = null;
	selectionForeground = null;
}
void onDragDetect(Event event) {
	boolean consume = false;
	if (chevronRect.contains(event.x, event.y) ||
	    minRect.contains(event.x, event.y) ||
		maxRect.contains(event.x, event.y)){
		consume = true;
	} else {
		for (int i = 0; i < items.length; i++) {
			if (items[i].closeRect.contains(event.x, event.y)) {
					consume = true;
					break;
			}
		}
	}
	if (consume) {
		event.type = SWT.None;
	}
}
void onFocus(Event event) {
	checkWidget();
	if (selectedIndex >= 0) {
		redraw();
	} else {
		setSelection(0, true);
	}
}
boolean onMnemonic (Event event) {
	char key = event.character;
	for (int i = 0; i < items.length; i++) {
		if (items[i] != null) {
			char mnemonic = getMnemonic (items[i].getText ());
			if (mnemonic != '\0') {
				if (Character.toUpperCase (key) == Character.toUpperCase (mnemonic)) {
					setSelection(i, true);
					return true;
				}
			}
		}
	}
	return false;
}
void onMouseDoubleClick(Event event) {	
	if (event.button != 1 || 
		(event.stateMask & SWT.BUTTON2) != 0 || 
		(event.stateMask & SWT.BUTTON3) != 0) return;
	Event e = new Event();
	e.item = getItem(new Point(event.x, event.y));
	if (e.item != null) {
		notifyListeners(SWT.DefaultSelection, e);
	}
}
void onMouseHover(Event event) {
	showToolTip(event.x, event.y);
}
void onMouse(Event event) {
	int x = event.x, y = event.y;
	switch (event.type) {
		case SWT.MouseExit: {
			if (minImageState != NORMAL) {
				minImageState = NORMAL;
				redraw(minRect.x, minRect.y, minRect.width, minRect.height, false);
			}
			if (maxImageState != NORMAL) {
				maxImageState = NORMAL;
				redraw(maxRect.x, maxRect.y, maxRect.width, maxRect.height, false);
			}
			if (chevronImageState != NORMAL) {
				chevronImageState = NORMAL;
				redraw(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, false);
			}
			for (int i=0; i<items.length; i++) {
				CTabItem item = items[i];
				if (i != selectedIndex && item.closeImageState != NONE) {
					item.closeImageState = NONE;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
				}
				if (i == selectedIndex && item.closeImageState != NORMAL) {
					item.closeImageState = NORMAL;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
				}
			}
			break;
		}
		case SWT.MouseDown: {
			if (minRect.contains(x, y)) {
				if (event.button != 1) return;
				minImageState = SELECTED;
				redraw(minRect.x, minRect.y, minRect.width, minRect.height, false);
				update();
				return;
			}
			if (maxRect.contains(x, y)) {
				if (event.button != 1) return;
				maxImageState = SELECTED;
				redraw(maxRect.x, maxRect.y, maxRect.width, maxRect.height, false);
				update();
				return;
			}
			if (chevronRect.contains(x, y)) {
				if (event.button != 1) return;
				if (chevronImageState != HOT) {
					chevronImageState = HOT;
				} else {
					chevronImageState = SELECTED;
				}
				redraw(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, false);
				update();
				return;
			}
			CTabItem item = null;
			if (single) {
				if (selectedIndex != -1) {
					Rectangle bounds = items[selectedIndex].getBounds();
					if (bounds.contains(x, y)){
						item = items[selectedIndex];
					}
				}
			} else {
				for (int i=0; i<items.length; i++) {
					Rectangle bounds = items[i].getBounds();
					if (bounds.contains(x, y)){
						item = items[i];
					}
				}
			}
			if (item != null) {
				if (item.closeRect.contains(x,y)){
					if (event.button != 1) return;
					item.closeImageState = SELECTED;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
					update();
					return;
				}
				int index = indexOf(item);
				if (item.isShowing()){
					setSelection(index, true);
				}
				return;
			}
			break;
		}
		case SWT.MouseMove: {
			boolean close = false, minimize = false, maximize = false, chevron = false;
			if (minRect.contains(x, y)) {
				minimize = true;
				if (minImageState != SELECTED && minImageState != HOT) {
					minImageState = HOT;
					redraw(minRect.x, minRect.y, minRect.width, minRect.height, false);
				}
			}
			if (maxRect.contains(x, y)) {
				maximize = true;
				if (maxImageState != SELECTED && maxImageState != HOT) {
					maxImageState = HOT;
					redraw(maxRect.x, maxRect.y, maxRect.width, maxRect.height, false);
				}
			}
			if (chevronRect.contains(x, y)) {
				chevron = true;
				if (chevronImageState != SELECTED && chevronImageState != HOT) {
					chevronImageState = HOT;
					redraw(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, false);
				}
			}
			if (minImageState != NORMAL && !minimize) {
				minImageState = NORMAL;
				redraw(minRect.x, minRect.y, minRect.width, minRect.height, false);
			}
			if (maxImageState != NORMAL && !maximize) {
				maxImageState = NORMAL;
				redraw(maxRect.x, maxRect.y, maxRect.width, maxRect.height, false);
			}
			if (chevronImageState != NORMAL && !chevron) {
				chevronImageState = NORMAL;
				redraw(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, false);
			}
			for (int i=0; i<items.length; i++) {
				CTabItem item = items[i];
				close = false;
				if (item.getBounds().contains(x, y)) {
					close = true;
					if (item.closeRect.contains(x, y)) {
						if (item.closeImageState != SELECTED && item.closeImageState != HOT) {
							item.closeImageState = HOT;
							redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
						}
					} else {
						if (item.closeImageState != NORMAL) {
							item.closeImageState = NORMAL;
							redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
						}
					}
				} 
				if (i != selectedIndex && item.closeImageState != NONE && !close) {
					item.closeImageState = NONE;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
				}
				if (i == selectedIndex && item.closeImageState != NORMAL && !close) {
					item.closeImageState = NORMAL;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
				}
			}
			break;
		}
		case SWT.MouseUp: {
			if (event.button != 1) return;
			if (chevronRect.contains(x, y)) {
				boolean selected = chevronImageState == SELECTED;
				if (!selected) return;
				CTabFolderEvent e = new CTabFolderEvent(this);
				e.widget = this;
				e.time = event.time;
				e.x = chevronRect.x;
				e.y = chevronRect.y;
				e.width = chevronRect.width;
				e.height = chevronRect.height;
				e.doit = true;
				for (int i = 0; i < folderListeners.length; i++) {
					folderListeners[i].showList(e);
				}
				if (e.doit && !isDisposed()) {
					showList(chevronRect);
				}
				Display display = getDisplay();
				Point cursorLocation = display.getCursorLocation();
				cursorLocation = display.map(null, this, cursorLocation);
				chevronImageState = chevronRect.contains(cursorLocation) ? HOT : NORMAL;
				redraw(chevronRect.x, chevronRect.y, chevronRect.width, chevronRect.height, false);
				return;
			}
			if (minRect.contains(x, y)) {
				boolean selected = minImageState == SELECTED;
				minImageState = HOT;
				redraw(minRect.x, minRect.y, minRect.width, minRect.height, false);
				if (!selected) return;
				CTabFolderEvent e = new CTabFolderEvent(this);
				e.widget = this;
				e.time = event.time;
				for (int i = 0; i < folderListeners.length; i++) {
					if (minimized) {
						folderListeners[i].restore(e);
					} else {
						folderListeners[i].minimize(e);
					}
				}
				return;
			}
			if (maxRect.contains(x, y)) {
				boolean selected = maxImageState == SELECTED;
				maxImageState = HOT;
				redraw(maxRect.x, maxRect.y, maxRect.width, maxRect.height, false);
				if (!selected) return;
				CTabFolderEvent e = new CTabFolderEvent(this);
				e.widget = this;
				e.time = event.time;
				for (int i = 0; i < folderListeners.length; i++) {
					if (maximized) {
						folderListeners[i].restore(e);
					} else {
						folderListeners[i].maximize(e);
					}
				}
				return;
			}
			CTabItem item = null;
			if (single) {
				if (selectedIndex != -1) {
					Rectangle bounds = items[selectedIndex].getBounds();
					if (bounds.contains(x, y)){
						item = items[selectedIndex];
					}
				}
			} else {
				for (int i=0; i<items.length; i++) {
					Rectangle bounds = items[i].getBounds();
					if (bounds.contains(x, y)){
						item = items[i];
					}
				}
			}
			if (item != null) {
				if (item.closeRect.contains(x,y)) {
					boolean selected = item.closeImageState == SELECTED;
					item.closeImageState = HOT;
					redraw(item.closeRect.x, item.closeRect.y, item.closeRect.width, item.closeRect.height, false);
					if (!selected) return;
					CTabFold