| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.internal.motif.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * Instances of the receiver represent a selectable user interface object |
| * that allows the user to drag a rubber banded outline of the sash within |
| * the parent control. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>HORIZONTAL, VERTICAL, SMOOTH</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. |
| * </p><p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#sash">Sash snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| */ |
| public class Sash extends Control { |
| boolean dragging; |
| int startX, startY, lastX, lastY; |
| int cursor; |
| private final static int INCREMENT = 1; |
| private final static int PAGE_INCREMENT = 9; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#HORIZONTAL |
| * @see SWT#VERTICAL |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Sash (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the control is selected by the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid. |
| * If the receiver is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * |
| * @param listener the listener which should be notified when the control is selected by the user |
| * |
| * @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 #removeSelectionListener |
| * @see SelectionEvent |
| */ |
| public void addSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener(listener); |
| addListener(SWT.Selection,typedListener); |
| addListener(SWT.DefaultSelection,typedListener); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| int border = getBorderWidth (); |
| int width = border * 2, height = border * 2; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| width += DEFAULT_WIDTH; height += 3; |
| } else { |
| width += 3; height += DEFAULT_HEIGHT; |
| } |
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2); |
| return new Point (width, height); |
| } |
| void createHandle (int index) { |
| state |= THEME_BACKGROUND; |
| int border = (style & SWT.BORDER) != 0 ? 1 : 0; |
| int [] argList = { |
| OS.XmNborderWidth, border, |
| OS.XmNmarginWidth, 0, |
| OS.XmNmarginHeight, 0, |
| OS.XmNresizePolicy, OS.XmRESIZE_NONE, |
| OS.XmNancestorSensitive, 1, |
| OS.XmNtraversalOn, 0, |
| }; |
| int parentHandle = parent.handle; |
| handle = OS.XmCreateDrawingArea (parentHandle, null, argList, argList.length / 2); |
| } |
| void drawBand (int x, int y, int width, int height) { |
| if ((style & SWT.SMOOTH) != 0) return; |
| int display = OS.XtDisplay (parent.handle); |
| if (display == 0) return; |
| int window = OS.XtWindow (parent.handle); |
| if (window == 0) return; |
| int foreground = parent.getForegroundPixel (); |
| Control control = parent.findBackgroundControl (); |
| if (control == null) control = parent; |
| int background = control.getBackgroundPixel (); |
| int color = foreground ^ background; |
| byte [] bits = {-86, 85, -86, 85, -86, 85, -86, 85}; |
| int stipplePixmap = OS.XCreateBitmapFromData (display, window, bits, 8, 8); |
| int gc = OS.XCreateGC (display, window, 0, null); |
| OS.XSetForeground (display, gc, color); |
| OS.XSetStipple (display, gc, stipplePixmap); |
| OS.XSetSubwindowMode (display, gc, OS.IncludeInferiors); |
| OS.XSetFillStyle (display, gc, OS.FillStippled); |
| OS.XSetFunction (display, gc, OS.GXxor); |
| OS.XFillRectangle (display, window, gc, x, y, width, height); |
| OS.XFreePixmap (display, stipplePixmap); |
| OS.XFreeGC (display, gc); |
| } |
| void propagateWidget (boolean enabled) { |
| int xCursor = enabled && super.cursor != null ? super.cursor.handle : cursor; |
| propagateHandle (enabled, handle, xCursor); |
| } |
| void realizeChildren () { |
| super.realizeChildren (); |
| int xWindow = OS.XtWindow (handle); |
| if (xWindow == 0) return; |
| int xDisplay = OS.XtDisplay (handle); |
| if (xDisplay == 0) return; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_v_double_arrow); |
| } else { |
| cursor = OS.XCreateFontCursor (xDisplay, OS.XC_sb_h_double_arrow); |
| } |
| if (super.cursor == null && isEnabled ()) { |
| OS.XDefineCursor (xDisplay, xWindow, cursor); |
| OS.XFlush (xDisplay); |
| } |
| } |
| void releaseWidget () { |
| super.releaseWidget (); |
| if (cursor != 0) { |
| int display = OS.XtDisplay (handle); |
| if (display != 0) OS.XFreeCursor (display, cursor); |
| } |
| cursor = 0; |
| } |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected by the user. |
| * |
| * @param listener the listener which should no longer 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); |
| } |
| public void setCursor (Cursor cursor) { |
| checkWidget(); |
| super.setCursor (cursor); |
| if (cursor == null && this.cursor != 0) { |
| int xWindow = OS.XtWindow (handle); |
| if (xWindow == 0) return; |
| int xDisplay = OS.XtDisplay (handle); |
| if (xDisplay == 0) return; |
| OS.XDefineCursor (xDisplay, xWindow, this.cursor); |
| OS.XFlush (xDisplay); |
| } |
| } |
| public boolean setFocus () { |
| checkWidget(); |
| return forceFocus (); |
| } |
| int XButtonPress (int w, int client_data, int call_data, int continue_to_dispatch) { |
| int result = super.XButtonPress (w, client_data, call_data, continue_to_dispatch); |
| if (result != 0) return result; |
| XButtonEvent xEvent = new XButtonEvent (); |
| OS.memmove (xEvent, call_data, XButtonEvent.sizeof); |
| if (xEvent.button != 1) return result; |
| short [] x_root = new short [1], y_root = new short [1]; |
| OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root); |
| startX = xEvent.x_root - x_root [0]; |
| startY = xEvent.y_root - y_root [0]; |
| int [] argList = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int border = argList [9], width = argList [5] + (border * 2), height = argList [7] + (border * 2); |
| lastX = ((short) argList [1]) - border; lastY = ((short) argList [3]) - border; |
| Event event = new Event (); |
| event.time = xEvent.time; |
| event.x = lastX; |
| event.y = lastY; |
| event.width = width; |
| event.height = height; |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| dragging = true; |
| lastX = event.x; |
| lastY = event.y; |
| parent.update (true); |
| drawBand (event.x, event.y, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBounds (event.x, event.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| int XButtonRelease (int w, int client_data, int call_data, int continue_to_dispatch) { |
| int result = super.XButtonRelease (w, client_data, call_data, continue_to_dispatch); |
| if (result != 0) return result; |
| XButtonEvent xEvent = new XButtonEvent (); |
| OS.memmove (xEvent, call_data, XButtonEvent.sizeof); |
| if (xEvent.button != 1) return result; |
| if (!dragging) return result; |
| dragging = false; |
| int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int border = argList [5]; |
| int width = argList [1] + (border * 2), height = argList [3] + (border * 2); |
| Event event = new Event (); |
| event.time = xEvent.time; |
| event.x = lastX; |
| event.y = lastY; |
| event.width = width; |
| event.height = height; |
| drawBand (lastX, lastY, width, height); |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| if ((style & SWT.SMOOTH) != 0) { |
| setBounds (event.x, event.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| int xFocusIn (XFocusChangeEvent xEvent) { |
| int result = super.xFocusIn (xEvent); |
| if (handle == 0) return result; |
| int [] argList = {OS.XmNx, 0, OS.XmNy, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| lastX = argList [1]; |
| lastY = argList [3]; |
| return result; |
| } |
| int XKeyPress (int w, int client_data, int call_data, int continue_to_dispatch) { |
| int result = super.XKeyPress (w, client_data, call_data, continue_to_dispatch); |
| if (result != 0) return result; |
| XKeyEvent xEvent = new XKeyEvent (); |
| OS.memmove (xEvent, call_data, XKeyEvent.sizeof); |
| byte [] buffer = new byte [1]; |
| int [] keysym = new int [1]; |
| OS.XLookupString (xEvent, buffer, buffer.length, keysym, null); |
| |
| switch (keysym [0]) { |
| case OS.XK_Left: |
| case OS.XK_Right: |
| case OS.XK_Up: |
| case OS.XK_Down: |
| int xChange = 0, yChange = 0; |
| int stepSize = PAGE_INCREMENT; |
| if ((xEvent.state & OS.ControlMask) != 0) stepSize = INCREMENT; |
| if ((style & SWT.VERTICAL) != 0) { |
| if (keysym [0] == OS.XK_Up || keysym [0] == OS.XK_Down) break; |
| xChange = keysym [0] == OS.XK_Left ? -stepSize : stepSize; |
| } else { |
| if (keysym [0] == OS.XK_Left || keysym [0] == OS.XK_Right) break; |
| yChange = keysym [0] == OS.XK_Up ? -stepSize : stepSize; |
| } |
| |
| int [] argList1 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int border = argList1 [5]; |
| int width = argList1 [1] + (border * 2), height = argList1 [3] + (border * 2); |
| int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (parent.handle, argList2, argList2.length / 2); |
| int parentBorder = argList2 [5]; |
| int parentWidth = argList2 [1] + (parentBorder * 2); |
| int parentHeight = argList2 [3] + (parentBorder * 2); |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, lastX + xChange - parentBorder - startX), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, lastY + yChange - parentBorder - startY), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return result; |
| |
| /* Ensure that the pointer image does not change */ |
| int xDisplay = display.xDisplay; |
| int xWindow = OS.XtWindow (parent.handle); |
| int ptrGrabResult = OS.XGrabPointer ( |
| xDisplay, |
| xWindow, |
| 1, |
| OS.None, |
| OS.GrabModeAsync, |
| OS.GrabModeAsync, |
| OS.None, |
| cursor, |
| OS.CurrentTime); |
| |
| Event event = new Event (); |
| event.time = xEvent.time; |
| event.x = newX; |
| event.y = newY; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Selection, event); |
| if (ptrGrabResult == OS.GrabSuccess) OS.XUngrabPointer (xDisplay, OS.CurrentTime); |
| if (isDisposed ()) break; |
| |
| if (event.doit) { |
| lastX = event.x; |
| lastY = event.y; |
| if ((style & SWT.SMOOTH) != 0) { |
| setBounds (event.x, event.y, width, height); |
| if (isDisposed ()) break; |
| } |
| int cursorX = event.x, cursorY = event.y; |
| if ((style & SWT.VERTICAL) != 0) { |
| cursorY += height / 2; |
| } else { |
| cursorX += width / 2; |
| } |
| OS.XWarpPointer (xDisplay, OS.None, xWindow, 0, 0, 0, 0, cursorX, cursorY); |
| } |
| break; |
| } |
| |
| return result; |
| } |
| int XPointerMotion (int w, int client_data, int call_data, int continue_to_dispatch) { |
| int result = super.XPointerMotion (w, client_data, call_data, continue_to_dispatch); |
| if (result != 0) return result; |
| XMotionEvent xEvent = new XMotionEvent (); |
| OS.memmove (xEvent, call_data, XMotionEvent.sizeof); |
| if (!dragging || (xEvent.state & OS.Button1Mask) == 0) return result; |
| short [] x_root = new short [1], y_root = new short [1]; |
| OS.XtTranslateCoords (handle, (short) 0, (short) 0, x_root, y_root); |
| int eventX = xEvent.x_root - x_root [0], eventY = xEvent.y_root - y_root [0]; |
| int [] argList1 = {OS.XmNx, 0, OS.XmNy, 0, OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int border = argList1 [9], x = ((short) argList1 [1]) - border, y = ((short) argList1 [3]) - border; |
| int width = argList1 [5] + (border * 2), height = argList1 [7] + (border * 2); |
| int [] argList2 = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (parent.handle, argList2, argList2.length / 2); |
| int parentBorder = argList2 [5]; |
| int parentWidth = argList2 [1] + (parentBorder * 2); |
| int parentHeight = argList2 [3] + (parentBorder * 2); |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, eventX + x - startX - parentBorder), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, eventY + y - startY - parentBorder), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return result; |
| drawBand (lastX, lastY, width, height); |
| Event event = new Event (); |
| event.time = xEvent.time; |
| event.x = newX; |
| event.y = newY; |
| event.width = width; |
| event.height = height; |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| sendEvent (SWT.Selection, event); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| lastX = event.x; |
| lastY = event.y; |
| } |
| parent.update (true); |
| drawBand (lastX, lastY, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBounds (lastX, lastY, width, height); |
| // widget could be disposed at this point |
| } |
| return result; |
| } |
| } |