void drawRectangles(Rectangle[] rects, boolean stippled) {
   int xDisplay = display.xDisplay;
   int color = OS.XWhitePixel(xDisplay, 0);
   int xWindow = OS.XDefaultRootWindow(xDisplay);
   if (parent != null) {
     xWindow = OS.XtWindow(parent.handle);
     if (xWindow == 0) return;
     int foreground = parent.getForegroundPixel();
     Control control = parent.findBackgroundControl();
     if (control == null) control = parent;
     int background = control.getBackgroundPixel();
     color = foreground ^ background;
   }
   int gc = OS.XCreateGC(xDisplay, xWindow, 0, null);
   OS.XSetForeground(xDisplay, gc, color);
   OS.XSetSubwindowMode(xDisplay, gc, OS.IncludeInferiors);
   OS.XSetFunction(xDisplay, gc, OS.GXxor);
   int stipplePixmap = 0;
   if (stippled) {
     byte[] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
     stipplePixmap = OS.XCreateBitmapFromData(xDisplay, xWindow, bits, 8, 8);
     OS.XSetStipple(xDisplay, gc, stipplePixmap);
     OS.XSetFillStyle(xDisplay, gc, OS.FillStippled);
     OS.XSetLineAttributes(xDisplay, gc, 3, OS.LineSolid, OS.CapButt, OS.JoinMiter);
   }
   for (int i = 0; i < rects.length; i++) {
     Rectangle rect = rects[i];
     OS.XDrawRectangle(xDisplay, xWindow, gc, rect.x, rect.y, rect.width, rect.height);
   }
   if (stippled) {
     OS.XFreePixmap(xDisplay, stipplePixmap);
   }
   OS.XFreeGC(xDisplay, gc);
 }
Exemple #2
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 boolean hasCursor() {
   int[] unused = new int[1], buffer = new int[1];
   int xDisplay = OS.XtDisplay(handle);
   int xWindow, xParent = OS.XDefaultRootWindow(xDisplay);
   do {
     if (OS.XQueryPointer(
             xDisplay, xParent, unused, buffer, unused, unused, unused, unused, unused)
         == 0) return false;
     if ((xWindow = buffer[0]) != 0) xParent = xWindow;
   } while (xWindow != 0);
   return handle == OS.XtWindowToWidget(xDisplay, xParent);
 }
  /**
   * 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;
  }