coolitem.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

	int hwndAbove = 0;
	if (newControl != null) {
		hwndAbove = OS.GetWindow (hwndChild, OS.GW_HWNDPREV);
	}		
	boolean hideNew = newControl != null && !newControl.getVisible ();
	boolean showOld = oldControl != null && oldControl.getVisible ();
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
	if (hideNew) newControl.setVisible (false);
	if (showOld) oldControl.setVisible (true);
	if (hwndAbove != 0 && hwndAbove != hwndChild) {
		int flags = OS.SWP_NOSIZE | OS.SWP_NOMOVE | OS.SWP_NOACTIVATE; 
		SetWindowPos (hwndChild, hwndAbove, 0, 0, 0, 0, flags);
	}
}

/**
 * Returns a point describing the receiver's ideal size.
 * The x coordinate of the result is the ideal width of the receiver.
 * The y coordinate of the result is the ideal height of the receiver.
 *
 * @return the receiver's ideal size
 *
 * @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 Point getPreferredSize () {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return new Point (0, 0);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_IDEALSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	int width = rbBand.cxIdeal + parent.getMargin (index);
	return new Point (width, rbBand.cyMinChild);
}

/**
 * Sets the receiver's ideal size to the point specified by the arguments.
 *
 * @param width the new ideal width for the receiver
 * @param height the new ideal height for the receiver
 *
 * @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 setPreferredSize (int width, int height) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return;
	width = Math.max (0, width);
	height = Math.max (0, height);
	ideal = true;
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	
	/* Get the child size fields first so we don't overwrite them. */
	rbBand.fMask = OS.RBBIM_CHILDSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	
	/* Set the size fields we are currently modifying. */
	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_IDEALSIZE;
	rbBand.cxIdeal = Math.max (0, width - parent.getMargin (index));
	rbBand.cyMaxChild = height;
	if (!minimum) rbBand.cyMinChild = height;
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
}

/**
 * Sets the receiver's ideal size to the point specified by the argument.
 *
 * @param size the new ideal size for the receiver
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the point 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 setPreferredSize (Point size) {
	checkWidget ();
	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
	setPreferredSize (size.x, size.y);
}

/**
 * Returns a point describing the receiver's size. The
 * x coordinate of the result is the width of the receiver.
 * The y coordinate of the result is the height of the
 * receiver.
 *
 * @return the receiver's size
 *
 * @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 Point getSize() {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) new Point (0, 0);
	int hwnd = parent.handle;
	RECT rect = new RECT ();
	OS.SendMessage (hwnd, OS.RB_GETRECT, index, rect);
	if (OS.COMCTL32_MAJOR >= 6) {
		MARGINS margins = new MARGINS ();
		OS.SendMessage (hwnd, OS.RB_GETBANDMARGINS, 0, margins);
		rect.left -= margins.cxLeftWidth;
		rect.right += margins.cxRightWidth;
	}
	if (!parent.isLastItemOfRow (index)) {
		rect.right += (parent.style & SWT.FLAT) == 0 ? CoolBar.SEPARATOR_WIDTH : 0;
	}
	int width = rect.right - rect.left;
	int height = rect.bottom - rect.top;
	return new Point (width, height);
}

/**
 * Sets the receiver's size to the point specified by the arguments.
 * <p>
 * Note: Attempting to set the width or height of the
 * receiver to a negative number will cause that
 * value to be set to zero instead.
 * </p>
 *
 * @param width the new width for the receiver
 * @param height the new height for the receiver
 *
 * @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 setSize (int width, int height) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return;
	width = Math.max (0, width);
	height = Math.max (0, height);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	
	/* Get the child size fields first so we don't overwrite them. */
	rbBand.fMask = OS.RBBIM_CHILDSIZE | OS.RBBIM_IDEALSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	
	/* Set the size fields we are currently modifying. */
	if (!ideal) rbBand.cxIdeal = Math.max (0, width - parent.getMargin (index));
	if (!minimum) rbBand.cyMinChild = height;
	rbBand.cyChild = rbBand.cyMaxChild = height;
	
	/*
	* Do not set the size for the last item on the row.
	*/	
	if (!parent.isLastItemOfRow (index)) {
		if (OS.COMCTL32_MAJOR >= 6) {
			MARGINS margins = new MARGINS ();
			OS.SendMessage (hwnd, OS.RB_GETBANDMARGINS, 0, margins);
			width -= margins.cxLeftWidth;
			width -= margins.cxRightWidth;
		}
		int separator = (parent.style & SWT.FLAT) == 0 ? CoolBar.SEPARATOR_WIDTH : 0;
		rbBand.cx = width - separator;
		rbBand.fMask |= OS.RBBIM_SIZE;
	}
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
}

/**
 * Sets the receiver's size to the point specified by the argument.
 * <p>
 * Note: Attempting to set the width or height of the
 * receiver to a negative number will cause them to be
 * set to zero instead.
 * </p>
 *
 * @param size the new size for the receiver
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the point 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 setSize (Point size) {
	if (size == null) error(SWT.ERROR_NULL_ARGUMENT);
	setSize (size.x, size.y);
}

/**
 * Returns the minimum size that the cool item can
 * be resized to using the cool item's gripper.
 * 
 * @return a point containing the minimum width and height of the cool item, in pixels
 * 
 * @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>
 * 
 * @since 2.0
 */
public Point getMinimumSize () {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return new Point (0, 0);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_CHILDSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	return new Point (rbBand.cxMinChild, rbBand.cyMinChild);
}

/**
 * Sets the minimum size that the cool item can be resized to
 * using the cool item's gripper, to the point specified by the arguments.
 * 
 * @param width the minimum width of the cool item, in pixels
 * @param height the minimum height of the cool item, in pixels
 * 
 * @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>
 * 
 * @since 2.0
 */
public void setMinimumSize (int width, int height) {
	checkWidget ();
	int index = parent.indexOf (this);
	if (index == -1) return;
	width = Math.max (0, width);
	height = Math.max (0, height);
	minimum = true;
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	
	/* Get the child size fields first so we don't overwrite them. */
	rbBand.fMask = OS.RBBIM_CHILDSIZE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	
	/* Set the size fields we are currently modifying. */
	rbBand.cxMinChild = width;
	rbBand.cyMinChild = height;
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
}

/**
 * Sets the minimum size that the cool item can be resized to
 * using the cool item's gripper, to the point specified by the argument.
 * 
 * @param size a point representing the minimum width and height of the cool item, in pixels
 * 
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the point 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>
 * 
 * @since 2.0
 */
public void setMinimumSize (Point size) {
	checkWidget ();
	if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
	setMinimumSize (size.x, size.y);
}

boolean getWrap() {
	int index = parent.indexOf (this);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_STYLE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	return (rbBand.fStyle & OS.RBBS_BREAK) != 0;
}

void setWrap(boolean wrap) {
	int index = parent.indexOf (this);
	int hwnd = parent.handle;
	REBARBANDINFO rbBand = new REBARBANDINFO ();
	rbBand.cbSize = REBARBANDINFO.sizeof;
	rbBand.fMask = OS.RBBIM_STYLE;
	OS.SendMessage (hwnd, OS.RB_GETBANDINFO, index, rbBand);
	if (wrap) {
		rbBand.fStyle |= OS.RBBS_BREAK;
	} else {
		rbBand.fStyle &= ~OS.RBBS_BREAK;
	}
	OS.SendMessage (hwnd, OS.RB_SETBANDINFO, index, rbBand);
}

/**
 * Removes the listener from the collection of listeners that
 * 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
 * 
 * @since 2.0
 */
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);	
}

}