示例#1
0
 /**
  * Shorten the given text <code>t</code> so that its length doesn't exceed the given width. The
  * default implementation replaces characters in the center of the original string with an
  * ellipsis ("..."). Override if you need a different strategy.
  *
  * @param gc the gc to use for text measurement
  * @param t the text to shorten
  * @param width the width to shorten the text to, in pixels
  * @return the shortened text
  */
 protected String shortenText(GC gc, String t, int width) {
   if (t == null) return null;
   int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x;
   if (width <= w) return t;
   int l = t.length();
   int max = l / 2;
   int min = 0;
   int mid = (max + min) / 2 - 1;
   if (mid <= 0) return t;
   TextLayout layout = new TextLayout(getDisplay());
   layout.setText(t);
   mid = validateOffset(layout, mid);
   while (min < mid && mid < max) {
     String s1 = t.substring(0, mid);
     String s2 = t.substring(validateOffset(layout, l - mid), l);
     int l1 = gc.textExtent(s1, DRAW_FLAGS).x;
     int l2 = gc.textExtent(s2, DRAW_FLAGS).x;
     if (l1 + w + l2 > width) {
       max = mid;
       mid = validateOffset(layout, (max + min) / 2);
     } else if (l1 + w + l2 < width) {
       min = mid;
       mid = validateOffset(layout, (max + min) / 2);
     } else {
       min = max;
     }
   }
   String result =
       mid == 0
           ? t
           : t.substring(0, mid) + ELLIPSIS + t.substring(validateOffset(layout, l - mid), l);
   layout.dispose();
   return result;
 }
示例#2
0
  /** Compute the minimum size. */
  private Point getTotalSize(Image image, String text) {
    Point size = new Point(0, 0);

    if (image != null) {
      Rectangle r = image.getBounds();
      size.x += r.width;
      size.y += r.height;
    }

    GC gc = new GC(this);
    if (text != null && text.length() > 0) {
      Point e = gc.textExtent(text, DRAW_FLAGS);
      size.x += e.x;
      size.y = Math.max(size.y, e.y);
      if (image != null) size.x += GAP;
    } else {
      size.y = Math.max(size.y, gc.getFontMetrics().getHeight());
    }
    gc.dispose();

    return size;
  }
示例#3
0
 Point computeSize(GC gc) {
   int width = 0, height = 0;
   if ((style & SWT.SEPARATOR) != 0) {
     if ((parent.style & SWT.HORIZONTAL) != 0) {
       width = getWidth();
       height = DEFAULT_HEIGHT;
     } else {
       width = DEFAULT_WIDTH;
       height = getWidth();
     }
     if (control != null) {
       height = Math.max(height, control.getMinimumHeight());
     }
     return new Point(width, height);
   }
   int[] argList = {
     OS.XmNmarginHeight, 0,
     OS.XmNmarginWidth, 0,
     OS.XmNshadowThickness, 0,
   };
   OS.XtGetValues(handle, argList, argList.length / 2);
   int marginHeight = argList[1], marginWidth = argList[3];
   int shadowThickness = argList[5];
   if ((parent.style & SWT.FLAT) != 0) {
     shadowThickness = Math.min(2, display.buttonShadowThickness);
   }
   if (text.length() != 0 || image != null) {
     int textWidth = 0, textHeight = 0;
     if (text.length() != 0) {
       int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB | SWT.DRAW_MNEMONIC;
       Point textExtent = gc.textExtent(text, flags);
       textWidth = textExtent.x;
       textHeight = textExtent.y;
     }
     int imageWidth = 0, imageHeight = 0;
     if (image != null) {
       Rectangle rect = image.getBounds();
       imageWidth = rect.width;
       imageHeight = rect.height;
     }
     if ((parent.style & SWT.RIGHT) != 0) {
       width = imageWidth + textWidth;
       height = Math.max(imageHeight, textHeight);
       if (imageWidth != 0 && textWidth != 0) width += 2;
     } else {
       height = imageHeight + textHeight;
       if (imageHeight != 0 && textHeight != 0) height += 2;
       width = Math.max(imageWidth, textWidth);
     }
   } else {
     width = DEFAULT_WIDTH;
     height = DEFAULT_HEIGHT;
   }
   if ((style & SWT.DROP_DOWN) != 0) {
     width += 12;
   }
   if (width != 0) {
     width += (marginWidth + shadowThickness) * 2 + 2;
   } else {
     width = DEFAULT_WIDTH;
   }
   if (height != 0) {
     height += (marginHeight + shadowThickness) * 2 + 2;
   } else {
     height = DEFAULT_HEIGHT;
   }
   return new Point(width, height);
 }
示例#4
0
  int XmNexposureCallback(int w, int client_data, int call_data) {
    if ((style & SWT.SEPARATOR) != 0) return 0;
    int xDisplay = OS.XtDisplay(handle);
    if (xDisplay == 0) return 0;
    int xWindow = OS.XtWindow(handle);
    if (xWindow == 0) return 0;
    int[] argList = {
      OS.XmNcolormap, 0,
      OS.XmNwidth, 0,
      OS.XmNheight, 0,
    };
    OS.XtGetValues(handle, argList, argList.length / 2);
    int width = argList[3], height = argList[5];

    Image currentImage = image;
    boolean enabled = getEnabled();

    if ((parent.style & SWT.FLAT) != 0) {
      boolean hasCursor = hasCursor();

      /* Set the shadow thickness */
      int thickness = 0;
      if (set || (hasCursor && enabled)) {
        thickness = Math.min(2, display.buttonShadowThickness);
      }
      argList = new int[] {OS.XmNshadowThickness, thickness};
      OS.XtSetValues(handle, argList, argList.length / 2);

      /* Determine if hot image should be used */
      if (enabled && hasCursor && hotImage != null) {
        currentImage = hotImage;
      }
    }

    GCData data = new GCData();
    data.device = display;
    data.display = xDisplay;
    data.drawable = xWindow;
    data.font = parent.font;
    data.colormap = argList[1];
    int xGC = OS.XCreateGC(xDisplay, xWindow, 0, null);
    if (xGC == 0) SWT.error(SWT.ERROR_NO_HANDLES);
    GC gc = GC.motif_new(xGC, data);

    XmAnyCallbackStruct cb = new XmAnyCallbackStruct();
    OS.memmove(cb, call_data, XmAnyCallbackStruct.sizeof);
    if (cb.event != 0) {
      XExposeEvent xEvent = new XExposeEvent();
      OS.memmove(xEvent, cb.event, XExposeEvent.sizeof);
      Rectangle rect = new Rectangle(xEvent.x, xEvent.y, xEvent.width, xEvent.height);
      gc.setClipping(rect);
    }

    if (!enabled) {
      currentImage = disabledImage;
      if (currentImage == null && image != null) {
        currentImage = new Image(display, image, SWT.IMAGE_DISABLE);
      }
      Color disabledColor = display.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
      gc.setForeground(disabledColor);
    } else {
      gc.setForeground(parent.getForeground());
    }
    gc.setBackground(parent.getBackground());

    int textX = 0, textY = 0, textWidth = 0, textHeight = 0;
    if (text.length() != 0) {
      int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB | SWT.DRAW_MNEMONIC;
      Point textExtent = gc.textExtent(text, flags);
      textWidth = textExtent.x;
      textHeight = textExtent.y;
    }
    int imageX = 0, imageY = 0, imageWidth = 0, imageHeight = 0;
    if (currentImage != null) {
      Rectangle imageBounds = currentImage.getBounds();
      imageWidth = imageBounds.width;
      imageHeight = imageBounds.height;
    }

    int spacing = 0;
    if (textWidth != 0 && imageWidth != 0) spacing = 2;
    if ((parent.style & SWT.RIGHT) != 0) {
      imageX = (width - imageWidth - textWidth - spacing) / 2;
      imageY = (height - imageHeight) / 2;
      textX = spacing + imageX + imageWidth;
      textY = (height - textHeight) / 2;
    } else {
      imageX = (width - imageWidth) / 2;
      imageY = (height - imageHeight - textHeight - spacing) / 2;
      textX = (width - textWidth) / 2;
      textY = spacing + imageY + imageHeight;
    }

    if ((style & SWT.DROP_DOWN) != 0) {
      textX -= 6;
      imageX -= 6;
    }
    if (textWidth > 0) {
      int flags = SWT.DRAW_DELIMITER | SWT.DRAW_TAB | SWT.DRAW_MNEMONIC | SWT.DRAW_TRANSPARENT;
      gc.drawText(text, textX, textY, flags);
    }
    if (imageWidth > 0) gc.drawImage(currentImage, imageX, imageY);
    if ((style & SWT.DROP_DOWN) != 0) {
      int startX = width - 12, startY = (height - 2) / 2;
      int[] arrow = {startX, startY, startX + 3, startY + 3, startX + 6, startY};
      gc.setBackground(parent.getForeground());
      gc.fillPolygon(arrow);
      gc.drawPolygon(arrow);
    }
    gc.dispose();
    OS.XFreeGC(xDisplay, xGC);

    if (!enabled && disabledImage == null) {
      if (currentImage != null) currentImage.dispose();
    }
    return 0;
  }
示例#5
0
  void onPaint(PaintEvent event) {
    Rectangle rect = getClientArea();
    if (rect.width == 0 || rect.height == 0) return;

    boolean shortenText = false;
    String t = text;
    Image img = image;
    int availableWidth = Math.max(0, rect.width - (leftMargin + rightMargin));
    Point extent = getTotalSize(img, t);
    if (extent.x > availableWidth) {
      img = null;
      extent = getTotalSize(img, t);
      if (extent.x > availableWidth) {
        shortenText = true;
      }
    }

    GC gc = event.gc;
    String[] lines = text == null ? null : splitString(text);

    // shorten the text
    if (shortenText) {
      extent.x = 0;
      for (int i = 0; i < lines.length; i++) {
        Point e = gc.textExtent(lines[i], DRAW_FLAGS);
        if (e.x > availableWidth) {
          lines[i] = shortenText(gc, lines[i], availableWidth);
          extent.x = Math.max(extent.x, getTotalSize(null, lines[i]).x);
        } else {
          extent.x = Math.max(extent.x, e.x);
        }
      }
      if (appToolTipText == null) {
        super.setToolTipText(text);
      }
    } else {
      super.setToolTipText(appToolTipText);
    }

    // determine horizontal position
    int x = rect.x + leftMargin;
    if (align == SWT.CENTER) {
      x = (rect.width - extent.x) / 2;
    }
    if (align == SWT.RIGHT) {
      x = rect.width - rightMargin - extent.x;
    }

    // draw a background image behind the text
    try {
      if (backgroundImage != null) {
        // draw a background image behind the text
        Rectangle imageRect = backgroundImage.getBounds();
        // tile image to fill space
        gc.setBackground(getBackground());
        gc.fillRectangle(rect);
        int xPos = 0;
        while (xPos < rect.width) {
          int yPos = 0;
          while (yPos < rect.height) {
            gc.drawImage(backgroundImage, xPos, yPos);
            yPos += imageRect.height;
          }
          xPos += imageRect.width;
        }
      } else if (gradientColors != null) {
        // draw a gradient behind the text
        final Color oldBackground = gc.getBackground();
        if (gradientColors.length == 1) {
          if (gradientColors[0] != null) gc.setBackground(gradientColors[0]);
          gc.fillRectangle(0, 0, rect.width, rect.height);
        } else {
          final Color oldForeground = gc.getForeground();
          Color lastColor = gradientColors[0];
          if (lastColor == null) lastColor = oldBackground;
          int pos = 0;
          for (int i = 0; i < gradientPercents.length; ++i) {
            gc.setForeground(lastColor);
            lastColor = gradientColors[i + 1];
            if (lastColor == null) lastColor = oldBackground;
            gc.setBackground(lastColor);
            if (gradientVertical) {
              final int gradientHeight = (gradientPercents[i] * rect.height / 100) - pos;
              gc.fillGradientRectangle(0, pos, rect.width, gradientHeight, true);
              pos += gradientHeight;
            } else {
              final int gradientWidth = (gradientPercents[i] * rect.width / 100) - pos;
              gc.fillGradientRectangle(pos, 0, gradientWidth, rect.height, false);
              pos += gradientWidth;
            }
          }
          if (gradientVertical && pos < rect.height) {
            gc.setBackground(getBackground());
            gc.fillRectangle(0, pos, rect.width, rect.height - pos);
          }
          if (!gradientVertical && pos < rect.width) {
            gc.setBackground(getBackground());
            gc.fillRectangle(pos, 0, rect.width - pos, rect.height);
          }
          gc.setForeground(oldForeground);
        }
        gc.setBackground(oldBackground);
      } else {
        if (background != null || (getStyle() & SWT.DOUBLE_BUFFERED) == 0) {
          gc.setBackground(getBackground());
          gc.fillRectangle(rect);
        }
      }
    } catch (SWTException e) {
      if ((getStyle() & SWT.DOUBLE_BUFFERED) == 0) {
        gc.setBackground(getBackground());
        gc.fillRectangle(rect);
      }
    }

    // draw border
    int style = getStyle();
    if ((style & SWT.SHADOW_IN) != 0 || (style & SWT.SHADOW_OUT) != 0) {
      paintBorder(gc, rect);
    }

    /*
     * Compute text height and image height. If image height is more than
     * the text height, draw image starting from top margin. Else draw text
     * starting from top margin.
     */
    Rectangle imageRect = null;
    int lineHeight = 0, textHeight = 0, imageHeight = 0;

    if (img != null) {
      imageRect = img.getBounds();
      imageHeight = imageRect.height;
    }
    if (lines != null) {
      lineHeight = gc.getFontMetrics().getHeight();
      textHeight = lines.length * lineHeight;
    }

    int imageY = 0, midPoint = 0, lineY = 0;
    if (imageHeight > textHeight) {
      if (topMargin == DEFAULT_MARGIN && bottomMargin == DEFAULT_MARGIN)
        imageY = rect.y + (rect.height - imageHeight) / 2;
      else imageY = topMargin;
      midPoint = imageY + imageHeight / 2;
      lineY = midPoint - textHeight / 2;
    } else {
      if (topMargin == DEFAULT_MARGIN && bottomMargin == DEFAULT_MARGIN)
        lineY = rect.y + (rect.height - textHeight) / 2;
      else lineY = topMargin;
      midPoint = lineY + textHeight / 2;
      imageY = midPoint - imageHeight / 2;
    }

    // draw the image
    if (img != null) {
      gc.drawImage(
          img, 0, 0, imageRect.width, imageHeight, x, imageY, imageRect.width, imageHeight);
      x += imageRect.width + GAP;
      extent.x -= imageRect.width + GAP;
    }

    // draw the text
    if (lines != null) {
      gc.setForeground(getForeground());
      for (int i = 0; i < lines.length; i++) {
        int lineX = x;
        if (lines.length > 1) {
          if (align == SWT.CENTER) {
            int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x;
            lineX = x + Math.max(0, (extent.x - lineWidth) / 2);
          }
          if (align == SWT.RIGHT) {
            int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x;
            lineX = Math.max(x, rect.x + rect.width - rightMargin - lineWidth);
          }
        }
        gc.drawText(lines[i], lineX, lineY, DRAW_FLAGS);
        lineY += lineHeight;
      }
    }
  }