Beispiel #1
0
 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 keyEvent = new XKeyEvent();
   OS.memmove(keyEvent, call_data, XKeyEvent.sizeof);
   if (keyEvent.keycode != 0) {
     int[] keysym = new int[1];
     OS.XLookupString(keyEvent, null, 0, keysym, null);
     keysym[0] &= 0xFFFF;
     int xChange = 0, yChange = 0;
     int stepSize = ((keyEvent.state & OS.ControlMask) != 0) ? STEPSIZE_SMALL : STEPSIZE_LARGE;
     switch (keysym[0]) {
       case OS.XK_KP_Enter:
       case OS.XK_Return:
         tracking = false;
         /* Eat the subsequent KeyRelease event */
         OS.XtAppNextEvent(OS.XtDisplayToApplicationContext(keyEvent.display), call_data);
         break;
       case OS.XK_Escape:
         tracking = false;
         cancelled = true;
         /* Eat the subsequent KeyRelease event */
         OS.XtAppNextEvent(OS.XtDisplayToApplicationContext(keyEvent.display), call_data);
         break;
       case OS.XK_Left:
         xChange = -stepSize;
         break;
       case OS.XK_Right:
         xChange = stepSize;
         break;
       case OS.XK_Up:
         yChange = -stepSize;
         break;
       case OS.XK_Down:
         yChange = stepSize;
         break;
     }
     if (xChange != 0 || yChange != 0) {
       Rectangle[] oldRectangles = rectangles;
       boolean oldStippled = stippled;
       Rectangle[] rectsToErase = new Rectangle[rectangles.length];
       for (int i = 0; i < rectangles.length; i++) {
         Rectangle current = rectangles[i];
         rectsToErase[i] = new Rectangle(current.x, current.y, current.width, current.height);
       }
       Event event = new Event();
       event.x = oldX + xChange;
       event.y = oldY + yChange;
       Point cursorPos;
       if ((style & SWT.RESIZE) != 0) {
         resizeRectangles(xChange, yChange);
         sendEvent(SWT.Resize, event);
         /*
          * It is possible (but unlikely) that application code
          * could have disposed the widget in the resize event.
          * If this happens then return false to indicate that
          * the move failed.
          */
         if (isDisposed()) {
           cancelled = true;
           return 1;
         }
         boolean draw = false;
         /*
          * It is possible that application code could have
          * changed the rectangles in the resize event.  If this
          * happens then only redraw the tracker if the rectangle
          * values have changed.
          */
         if (rectangles != oldRectangles) {
           int length = rectangles.length;
           if (length != rectsToErase.length) {
             draw = true;
           } else {
             for (int i = 0; i < length; i++) {
               if (!rectangles[i].equals(rectsToErase[i])) {
                 draw = true;
                 break;
               }
             }
           }
         } else {
           draw = true;
         }
         if (draw) {
           drawRectangles(rectsToErase, oldStippled);
           update();
           drawRectangles(rectangles, stippled);
         }
         cursorPos = adjustResizeCursor();
       } else {
         moveRectangles(xChange, yChange);
         sendEvent(SWT.Move, event);
         /*
          * It is possible (but unlikely) that application code
          * could have disposed the widget in the move event.
          * If this happens then return false to indicate that
          * the move failed.
          */
         if (isDisposed()) {
           cancelled = true;
           return 1;
         }
         boolean draw = false;
         /*
          * It is possible that application code could have
          * changed the rectangles in the move event.  If this
          * happens then only redraw the tracker if the rectangle
          * values have changed.
          */
         if (rectangles != oldRectangles) {
           int length = rectangles.length;
           if (length != rectsToErase.length) {
             draw = true;
           } else {
             for (int i = 0; i < length; i++) {
               if (!rectangles[i].equals(rectsToErase[i])) {
                 draw = true;
                 break;
               }
             }
           }
         } else {
           draw = true;
         }
         if (draw) {
           drawRectangles(rectsToErase, oldStippled);
           update();
           drawRectangles(rectangles, stippled);
         }
         cursorPos = adjustMoveCursor();
       }
       if (cursorPos != null) {
         oldX = cursorPos.x;
         oldY = cursorPos.y;
       }
     }
   }
   return result;
 }
Beispiel #2
0
  /**
   * Displays the Tracker rectangles for manipulation by the user. Returns when the user has either
   * finished manipulating the rectangles or has cancelled the Tracker.
   *
   * @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
   * @exception SWTException
   *     <ul>
   *       <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
   *       <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
   *     </ul>
   */
  public boolean open() {
    checkWidget();
    int xDisplay = display.xDisplay;
    window = OS.XDefaultRootWindow(xDisplay);
    if (parent != null) {
      window = OS.XtWindow(parent.handle);
      if (window == 0) return false;
    }
    cancelled = false;
    tracking = true;
    update();
    drawRectangles(rectangles, stippled);
    int[] oldX = new int[1], oldY = new int[1];
    int[] unused = new int[1], mask = new int[1];
    OS.XQueryPointer(xDisplay, window, unused, unused, oldX, oldY, unused, unused, mask);

    /*
     * If exactly one of UP/DOWN is specified as a style then set the cursor
     * orientation accordingly (the same is done for LEFT/RIGHT styles below).
     */
    int vStyle = style & (SWT.UP | SWT.DOWN);
    if (vStyle == SWT.UP || vStyle == SWT.DOWN) {
      cursorOrientation |= vStyle;
    }
    int hStyle = style & (SWT.LEFT | SWT.RIGHT);
    if (hStyle == SWT.LEFT || hStyle == SWT.RIGHT) {
      cursorOrientation |= hStyle;
    }

    int mouseMasks = OS.Button1Mask | OS.Button2Mask | OS.Button3Mask;
    boolean mouseDown = (mask[0] & mouseMasks) != 0;
    if (!mouseDown) {
      Point cursorPos = null;
      if ((style & SWT.RESIZE) != 0) {
        cursorPos = adjustResizeCursor();
      } else {
        cursorPos = adjustMoveCursor();
      }
      if (cursorPos != null) {
        oldX[0] = cursorPos.x;
        oldY[0] = cursorPos.y;
      }
    }
    this.oldX = oldX[0];
    this.oldY = oldY[0];

    int ptrGrabResult =
        OS.XGrabPointer(
            xDisplay,
            window,
            0,
            OS.ButtonPressMask | OS.ButtonReleaseMask | OS.PointerMotionMask,
            OS.GrabModeAsync,
            OS.GrabModeAsync,
            OS.None,
            OS.None,
            OS.CurrentTime);
    int kbdGrabResult =
        OS.XGrabKeyboard(xDisplay, window, 0, OS.GrabModeAsync, OS.GrabModeAsync, OS.CurrentTime);

    /* Tracker behaves like a Dialog with its own OS event loop. */
    XAnyEvent anyEvent = new XAnyEvent();
    int xEvent = OS.XtMalloc(XEvent.sizeof);
    int dispatch = OS.XtMalloc(4);
    int xtContext = OS.XtDisplayToApplicationContext(xDisplay);
    while (tracking) {
      if (parent != null && parent.isDisposed()) break;
      OS.XtAppNextEvent(xtContext, xEvent);
      OS.memmove(anyEvent, xEvent, XAnyEvent.sizeof);
      int widget = OS.XtWindowToWidget(anyEvent.display, anyEvent.window);
      switch (anyEvent.type) {
        case OS.MotionNotify:
          XPointerMotion(widget, 0, xEvent, dispatch);
          break;
        case OS.ButtonRelease:
          XButtonRelease(widget, 0, xEvent, dispatch);
          break;
        case OS.KeyPress:
          XKeyPress(widget, 0, xEvent, dispatch);
          break;
        case OS.KeyRelease:
          XKeyRelease(widget, 0, xEvent, dispatch);
          break;
        case OS.ButtonPress:
        case OS.EnterNotify:
        case OS.LeaveNotify:
          /* Do not dispatch these */
          break;
        case OS.Expose:
          update();
          drawRectangles(rectangles, stippled);
          OS.XtDispatchEvent(xEvent);
          drawRectangles(rectangles, stippled);
          break;
        default:
          OS.XtDispatchEvent(xEvent);
      }
    }
    if (xEvent != 0) OS.XtFree(xEvent);
    if (dispatch != 0) OS.XtFree(dispatch);
    if (!isDisposed()) {
      update();
      drawRectangles(rectangles, stippled);
    }
    if (ptrGrabResult == OS.GrabSuccess) OS.XUngrabPointer(xDisplay, OS.CurrentTime);
    if (kbdGrabResult == OS.GrabSuccess) OS.XUngrabKeyboard(xDisplay, OS.CurrentTime);
    window = 0;
    return !cancelled;
  }