toolitem.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

	toolTipText = null;
	disabledImage = hotImage = null;
	if (disabledImage2 != null) disabledImage2.dispose ();
	disabledImage2 = null;
}

void releaseImages () {
	TBBUTTONINFO info = new TBBUTTONINFO ();
	info.cbSize = TBBUTTONINFO.sizeof;
	info.dwMask = OS.TBIF_IMAGE | OS.TBIF_STYLE;
	int hwnd = parent.handle;
	OS.SendMessage (hwnd, OS.TB_GETBUTTONINFO, id, info);
	/*
	* Feature in Windows.  For some reason, a tool item that has
	* the style BTNS_SEP does not return I_IMAGENONE when queried
	* for an image index, despite the fact that no attempt has been
	* made to assign an image to the item.  As a result, operations
	* on an image list that use the wrong index cause random results.	
	* The fix is to ensure that the tool item is not a separator
	* before using the image index.  Since separators cannot have
	* an image and one is never assigned, this is not a problem.
	*/
	if ((info.fsStyle & OS.BTNS_SEP) == 0 && info.iImage != OS.I_IMAGENONE) {
		ImageList imageList = parent.getImageList ();
		ImageList hotImageList = parent.getHotImageList ();
		ImageList disabledImageList = parent.getDisabledImageList();
		if (imageList != null) imageList.put (info.iImage, null);
		if (hotImageList != null) hotImageList.put (info.iImage, null);
		if (disabledImageList != null) disabledImageList.put (info.iImage, null);
	}
}

/**
 * Removes the listener from the collection of listeners who will
 * be notified when the control is selected.
 *
 * @param listener the listener which should be notified
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 *
 * @see SelectionListener
 * @see #addSelectionListener
 */
public void removeSelectionListener(SelectionListener listener) {
	checkWidget();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (eventTable == null) return;
	eventTable.unhook (SWT.Selection, listener);
	eventTable.unhook (SWT.DefaultSelection,listener);	
}

void resizeControl () {
	if (control != null && !control.isDisposed ()) {
		/*
		* Set the size and location of the control
		* separately to minimize flashing in the
		* case where the control does not resize
		* to the size that was requested.  This
		* case can occur when the control is a
		* combo box.
		*/
		Rectangle itemRect = getBounds ();
		control.setSize (itemRect.width, itemRect.height);
		Rectangle rect = control.getBounds ();
		rect.x = itemRect.x + (itemRect.width - rect.width) / 2;
		rect.y = itemRect.y + (itemRect.height - rect.height) / 2;
		control.setLocation (rect.x, rect.y);
	}
}

void selectRadio () {
	int index = 0;
	ToolItem [] items = parent.getItems ();
	while (index < items.length && items [index] != this) index++;
	int i = index - 1;
	while (i >= 0 && items [i].setRadioSelection (false)) --i;
	int j = index + 1;
	while (j < items.length && items [j].setRadioSelection (false)) j++;
	setSelection (true);
}

/**
 * Sets the control that is used to fill the bounds of
 * the item when the items is a <code>SEPARATOR</code>.
 *
 * @param control the new control
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> 
 *    <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setControl (Control control) {
	checkWidget();
	if (control != null) {
		if (control.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
		if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT);
	}
	if ((style & SWT.SEPARATOR) == 0) return;
	this.control = control;
	resizeControl ();
}

/**
 * Enables the receiver if the argument is <code>true</code>,
 * and disables it otherwise.
 * <p>
 * A disabled control is typically
 * not selectable from the user interface and draws with an
 * inactive or "grayed" look.
 * </p>
 *
 * @param enabled the new enabled state
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setEnabled (boolean enabled) {
	checkWidget();
	int hwnd = parent.handle;
	int fsState = OS.SendMessage (hwnd, OS.TB_GETSTATE, id, 0);
	fsState &= ~OS.TBSTATE_ENABLED;
	if (enabled) fsState |= OS.TBSTATE_ENABLED;
	OS.SendMessage (hwnd, OS.TB_SETSTATE, id, fsState);
	if (image != null) updateImages ();
}

/**
 * Sets the receiver's disabled image to the argument, which may be
 * null indicating that no disabled image should be displayed.
 * <p>
 * The disbled image is displayed when the receiver is disabled.
 * </p>
 *
 * @param image the disabled image to display on the receiver (may be null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> 
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setDisabledImage (Image image) {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return;
	if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	disabledImage = image;
	updateImages ();
}

/**
 * Sets the receiver's hot image to the argument, which may be
 * null indicating that no hot image should be displayed.
 * <p>
 * The hot image is displayed when the mouse enters the receiver.
 * </p>
 *
 * @param image the hot image to display on the receiver (may be null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> 
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setHotImage (Image image) {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return;
	if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	hotImage = image;
	updateImages ();
}

public void setImage (Image image) {
	checkWidget();
	if ((style & SWT.SEPARATOR) != 0) return;
	if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	super.setImage (image);
	updateImages ();
}

boolean setRadioSelection (boolean value) {
	if ((style & SWT.RADIO) == 0) return false;
	if (getSelection () != value) {
		setSelection (value);
		postEvent (SWT.Selection);
	}
	return true;
}

/**
 * Sets the selection state of the receiver.
 * <p>
 * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
 * it is selected when it is checked (which some platforms draw as a
 * pushed in button).
 * </p>
 *
 * @param selected the new selection state
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setSelection (boolean selected) {
	checkWidget();
	if ((style & (SWT.CHECK | SWT.RADIO)) == 0) return;
	int hwnd = parent.handle;
	int fsState = OS.SendMessage (hwnd, OS.TB_GETSTATE, id, 0);
	fsState &= ~OS.TBSTATE_CHECKED;
	if (selected) fsState |= OS.TBSTATE_CHECKED;
	OS.SendMessage (hwnd, OS.TB_SETSTATE, id, fsState);
}
/**
 * Sets the receiver's text. The string may include
 * the mnemonic character.
 * </p>
 * <p>
 * Mnemonics are indicated by an '&amp' that causes the next
 * character to be the mnemonic.  When the user presses a
 * key sequence that matches the mnemonic, a selection
 * event occurs. On most platforms, the mnemonic appears
 * underlined but may be emphasised in a platform specific
 * manner.  The mnemonic indicator character '&amp' can be
 * escaped by doubling it in the string, causing a single
 *'&amp' to be displayed.
 * </p>
 * 
 * @param string the new text
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
 * </ul>
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setText (String string) {
	checkWidget();
	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
	if ((style & SWT.SEPARATOR) != 0) return;
	super.setText (string);
	int hwnd = parent.handle;
	int hHeap = OS.GetProcessHeap ();
	TCHAR buffer = new TCHAR (parent.getCodePage (), string, true);
	int byteCount = buffer.length () * TCHAR.sizeof;
	int pszText = OS.HeapAlloc (hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
	OS.MoveMemory (pszText, buffer, byteCount); 
	TBBUTTONINFO info = new TBBUTTONINFO ();
	info.cbSize = TBBUTTONINFO.sizeof;
	info.dwMask = OS.TBIF_TEXT | OS.TBIF_STYLE;
	info.pszText = pszText;
	info.fsStyle = (byte) (widgetStyle () | OS.BTNS_AUTOSIZE);
	if (string.length () != 0) info.fsStyle |= OS.BTNS_SHOWTEXT;
	OS.SendMessage (hwnd, OS.TB_SETBUTTONINFO, id, info);
	OS.HeapFree (hHeap, 0, pszText);
	
	/*
	* Bug in Windows.  For some reason, when the font is set
	* before any tool item has text, the tool items resize to
	* a very small size.  Also, a tool item will only show text
	* when text has already been set on one item and then a new
	* item is created.  The fix is to use WM_SETFONT to force
	* the tool bar to redraw and layout.  [1G0G7TV, 1G0FUJ5]
	*/
	int hFont = OS.SendMessage (hwnd, OS.WM_GETFONT, 0, 0);
	OS.SendMessage (hwnd, OS.WM_SETFONT, hFont, 0);
	
	parent.layoutItems ();
}

/**
 * Sets the receiver's tool tip text to the argument, which
 * may be null indicating that no tool tip text should be shown.
 *
 * @param string the new tool tip text (or null)
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setToolTipText (String string) {
	checkWidget();
	toolTipText = string;
}

/**
 * Sets the width of the receiver.
 *
 * @param width the new width
 *
 * @exception SWTException <ul>
 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 * </ul>
 */
public void setWidth (int width) {
	checkWidget();
	if ((style & SWT.SEPARATOR) == 0) return;
	if (width < 0) return;
	int hwnd = parent.handle;
	TBBUTTONINFO info = new TBBUTTONINFO ();
	info.cbSize = TBBUTTONINFO.sizeof;
	info.dwMask = OS.TBIF_SIZE;
	info.cx = (short) width;
	OS.SendMessage (hwnd, OS.TB_SETBUTTONINFO, id, info);
	parent.layoutItems ();
}

void updateImages () {
	int hwnd = parent.handle;
	TBBUTTONINFO info = new TBBUTTONINFO ();
	info.cbSize = TBBUTTONINFO.sizeof;
	info.dwMask = OS.TBIF_IMAGE;
	OS.SendMessage (hwnd, OS.TB_GETBUTTONINFO, id, info);
	if (info.iImage == OS.I_IMAGENONE && image == null) return;
	ImageList imageList = parent.getImageList ();
	ImageList hotImageList = parent.getHotImageList ();
	ImageList disabledImageList = parent.getDisabledImageList();
	if (info.iImage == OS.I_IMAGENONE) {
		Rectangle bounds = image.getBounds ();
		Point size = new Point (bounds.width, bounds.height);
		if (imageList == null) imageList = display.getToolImageList (size);
		info.iImage = imageList.add (image);
		parent.setImageList (imageList);
		if (disabledImageList == null) disabledImageList = display.getToolDisabledImageList (size);
		Image disabled = disabledImage;
		if (disabledImage == null) {
			if (disabledImage2 != null) disabledImage2.dispose ();
			disabledImage2 = null;
			disabled = image;
			if (!getEnabled ()) {
				Color color = parent.getBackground ();
				disabled = disabledImage2 = createDisabledImage (image, color);
			}
		}
		disabledImageList.add (disabled);
		parent.setDisabledImageList (disabledImageList);
//		if ((parent.style & SWT.FLAT) != 0) {
			if (hotImageList == null) hotImageList = display.getToolHotImageList (size);
			hotImageList.add (hotImage != null ? hotImage : image);
			parent.setHotImageList (hotImageList);
//		}
	} else {
		if (imageList != null) imageList.put (info.iImage, image);
		if (disabledImageList != null) {
			Image disabled = null;
			if (image != null) {
				if (disabledImage2 != null) disabledImage2.dispose ();
				disabledImage2 = null;
				disabled = disabledImage;
				if (disabledImage == null) {
					disabled = image;
					if (!getEnabled ()) {
						Color color = parent.getBackground ();
						disabled = disabledImage2 = createDisabledImage (image, color);
					}
				}
			}
			disabledImageList.put (info.iImage, disabled);
		}
		if (hotImageList != null) {
			Image hot = null;
			if (image != null) hot = hotImage != null ? hotImage : image;
			hotImageList.put (info.iImage, hot);
		}
		if (image == null) info.iImage = OS.I_IMAGENONE;
	}
	OS.SendMessage (hwnd, OS.TB_SETBUTTONINFO, id, info);
	
	parent.layoutItems ();
}

int widgetStyle () {
	if ((style & SWT.DROP_DOWN) != 0) return OS.BTNS_DROPDOWN;
	if ((style & SWT.PUSH) != 0) return OS.BTNS_BUTTON;
	if ((style & SWT.CHECK) != 0) return OS.BTNS_CHECK;
	/*
	* This code is intentionally commented.  In order to
	* consistently support radio tool items across platforms,
	* the platform radio behavior is not used.
	*/
//	if ((style & SWT.RADIO) != 0) return OS.BTNS_CHECKGROUP;
	if ((style & SWT.RADIO) != 0) return OS.BTNS_CHECK;
	if ((style & SWT.SEPARATOR) != 0) return OS.BTNS_SEP;
	return OS.BTNS_BUTTON;
}

LRESULT wmCommandChild (int wParam, int lParam) {
	if ((style & SWT.RADIO) != 0) {
		if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) {
			selectRadio ();
		}
	}
	postEvent (SWT.Selection);
	return null;
}

}