myviewform.java

来自「SANCHO」· Java 代码 · 共 697 行 · 第 1/2 页

   * Typically this is a Close button or a composite with a Menu and Close button.
   * 
   * @return the control in the top right corner of the pane or null
   */
  public Control getTopRight() {
    //checkWidget();
    return topRight;
  }

  public void layout(boolean changed) {
    checkWidget();
    Rectangle rect = getClientArea();

    Point leftSize = new Point(0, 0);
    if (topLeft != null && !topLeft.isDisposed()) {
      leftSize = topLeft.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    }
    Point centerSize = new Point(0, 0);
    if (topCenter != null && !topCenter.isDisposed()) {
      centerSize = topCenter.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    }
    Point rightSize = new Point(0, 0);
    if (topRight != null && !topRight.isDisposed()) {
      rightSize = topRight.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    }

    int minTopWidth = leftSize.x + centerSize.x + rightSize.x + 2 * marginWidth;
    int count = -1;
    if (leftSize.x > 0)
      count++;
    if (centerSize.x > 0)
      count++;
    if (rightSize.x > 0)
      count++;
    if (count > 0)
      minTopWidth += count * horizontalSpacing;

    int x = rect.x + rect.width - marginWidth;
    int y = rect.y + marginHeight;

    boolean top = false;
    if (separateTopCenter || minTopWidth > rect.width) {
      int topHeight = Math.max(rightSize.y, leftSize.y);
      if (topRight != null && !topRight.isDisposed()) {
        top = true;
        x -= rightSize.x;
        topRight.setBounds(x, y, rightSize.x, topHeight);
        x -= horizontalSpacing;
      }
      if (topLeft != null && !topLeft.isDisposed()) {
        top = true;
        leftSize = topLeft.computeSize(x - rect.x - marginWidth, SWT.DEFAULT);
        topLeft.setBounds(rect.x + marginWidth, y, leftSize.x, topHeight);
      }
      if (top)
        y += topHeight + verticalSpacing;
      if (topCenter != null && !topCenter.isDisposed()) {
        top = true;
        centerSize = topCenter.computeSize(rect.width - 2 * marginWidth, SWT.DEFAULT);
        topCenter.setBounds(rect.x + rect.width - marginWidth - centerSize.x, y, centerSize.x, centerSize.y);
        y += centerSize.y + verticalSpacing;
      }
    } else {
      int topHeight = Math.max(rightSize.y, Math.max(centerSize.y, leftSize.y));
      if (topRight != null && !topRight.isDisposed()) {
        top = true;
        x -= rightSize.x;
        topRight.setBounds(x, y, rightSize.x, topHeight);
        x -= horizontalSpacing;
      }
      if (topCenter != null && !topCenter.isDisposed()) {
        top = true;
        x -= centerSize.x;
        topCenter.setBounds(x, y, centerSize.x, topHeight);
        x -= horizontalSpacing;
      }
      if (topLeft != null && !topLeft.isDisposed()) {
        top = true;
        leftSize = topLeft.computeSize(x - rect.x - marginWidth, topHeight);
        topLeft.setBounds(rect.x + marginWidth, y, leftSize.x, topHeight);
      }
      if (top)
        y += topHeight + verticalSpacing;
    }

    if (content != null && !content.isDisposed()) {
      content.setBounds(rect.x + marginWidth, y, rect.width - 2 * marginWidth, rect.y + rect.height - y
          - marginHeight);
    }
  }

  void onDispose() {
    if (borderColor1 != null) {
      borderColor1.dispose();
    }
    borderColor1 = null;

    if (borderColor2 != null) {
      borderColor2.dispose();
    }
    borderColor2 = null;

    if (borderColor3 != null) {
      borderColor3.dispose();
    }
    borderColor3 = null;

    topLeft = null;
    topCenter = null;
    topRight = null;
    content = null;
    oldArea = null;
  }

  void onPaint(GC gc) {
    Color gcForeground = gc.getForeground();
    Point size = getSize();
    if (showBorder) {
      if ((getStyle() & SWT.FLAT) != 0) {
        gc.setForeground(borderColor1);
        gc.drawRectangle(0, 0, size.x - 1, size.y - 1);
      } else {
        gc.setForeground(borderColor1);
        gc.drawRectangle(0, 0, size.x - 3, size.y - 3);

        gc.setForeground(borderColor2);
        gc.drawLine(1, size.y - 2, size.x - 1, size.y - 2);
        gc.drawLine(size.x - 2, 1, size.x - 2, size.y - 1);

        gc.setForeground(borderColor3);
        gc.drawLine(2, size.y - 1, size.x - 2, size.y - 1);
        gc.drawLine(size.x - 1, 2, size.x - 1, size.y - 2);
      }
    }
    gc.setForeground(gcForeground);
  }

  void onResize() {
    layout();

    Rectangle area = super.getClientArea();
    if (oldArea == null || oldArea.width == 0 || oldArea.height == 0) {
      redraw();
    } else {
      int width = 0;
      if (oldArea.width < area.width) {
        width = area.width - oldArea.width + borderRight;
      } else if (oldArea.width > area.width) {
        width = borderRight;
      }
      redraw(area.x + area.width - width, area.y, width, area.height, false);

      int height = 0;
      if (oldArea.height < area.height) {
        height = area.height - oldArea.height + borderBottom;
      }
      if (oldArea.height > area.height) {
        height = borderBottom;
      }
      redraw(area.x, area.y + area.height - height, area.width, height, false);
    }
    oldArea = area;
  }

  /**
   * Sets the content.
   * Setting the content to null will remove it from 
   * the pane - however, the creator of the content must dispose of the content.
   * 
   * @param content the control to be displayed in the content area or null
   * 
   * @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>
   *    <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
   * </ul>
   */
  public void setContent(Control content) {
    checkWidget();
    if (content != null && content.getParent() != this) {
      SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    }
    if (this.content != null && !this.content.isDisposed()) {
      this.content.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
    }
    this.content = content;
    layout();
  }

  public void setFont(Font f) {
    super.setFont(f);
    if (topLeft != null && !topLeft.isDisposed())
      topLeft.setFont(f);
    if (topCenter != null && !topCenter.isDisposed())
      topCenter.setFont(f);
    if (topRight != null && !topRight.isDisposed())
      topRight.setFont(f);

    layout();
  }

  /**
   * Sets the layout which is associated with the receiver to be
   * the argument which may be null.
   * <p>
   * Note : ViewForm does not use a layout class to size and position its children.
   * </p>
   *
   * @param layout the receiver's new layout or null
   *
   * @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 setLayout(Layout layout) {
    checkWidget();
    return;
  }

  /**
   * Set the control that appears in the top center of the pane.
   * Typically this is a toolbar.
   * The topCenter is optional.  Setting the topCenter to null will remove it from 
   * the pane - however, the creator of the topCenter must dispose of the topCenter.
   * 
   * @param topCenter the control to be displayed in the top center or null
   * 
   * @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>
   *    <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
   * </ul>
   */
  public void setTopCenter(Control topCenter) {
    checkWidget();
    if (topCenter != null && topCenter.getParent() != this) {
      SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    }
    if (this.topCenter != null && !this.topCenter.isDisposed()) {
      this.topCenter.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
    }
    this.topCenter = topCenter;
    layout();
  }

  /**
   * Set the control that appears in the top left corner of the pane.
   * Typically this is a label such as CLabel.
   * The topLeft is optional.  Setting the top left control to null will remove it from 
   * the pane - however, the creator of the control must dispose of the control.
   * 
   * @param c the control to be displayed in the top left corner or null
   * 
   * @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>
   *    <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
   * </ul>
   */
  public void setTopLeft(Control c) {
    checkWidget();
    if (c != null && c.getParent() != this) {
      SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    }
    if (this.topLeft != null && !this.topLeft.isDisposed()) {
      this.topLeft.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
    }
    this.topLeft = c;
    layout();
  }

  /**
   * Set the control that appears in the top right corner of the pane.
   * Typically this is a Close button or a composite with a Menu and Close button.
   * The topRight is optional.  Setting the top right control to null will remove it from 
   * the pane - however, the creator of the control must dispose of the control.
   * 
   * @param c the control to be displayed in the top right corner or null
   * 
   * @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>
   *    <li>ERROR_INVALID_ARGUMENT - if the control is not a child of this ViewForm</li>
   * </ul>
   */
  public void setTopRight(Control c) {
    checkWidget();
    if (c != null && c.getParent() != this) {
      SWT.error(SWT.ERROR_INVALID_ARGUMENT);
    }
    if (this.topRight != null && !this.topRight.isDisposed()) {
      this.topRight.setBounds(OFFSCREEN, OFFSCREEN, 0, 0);
    }
    this.topRight = c;
    layout();
  }

  /**
   * Specify whether the border should be displayed or not.
   * 
   * @param show true if the border should be displayed
   * 
   * @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 setBorderVisible(boolean show) {
    checkWidget();
    if (showBorder == show)
      return;

    showBorder = show;
    if (showBorder) {
      if ((getStyle() & SWT.FLAT) != 0) {
        borderLeft = borderTop = borderRight = borderBottom = 1;
      } else {
        borderLeft = borderTop = 1;
        borderRight = borderBottom = 3;
      }
    } else {
      borderBottom = borderTop = borderLeft = borderRight = 0;
    }

    layout();
    redraw();
  }

  /**
   * If true, the topCenter will always appear on a separate line by itself, otherwise the 
   * topCenter will appear in the top row if there is room and will be moved to the second row if
   * required.
   * 
   * @param show true if the topCenter will always appear on a separate line by itself
   * 
   * @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 setTopCenterSeparate(boolean show) {
    checkWidget();
    separateTopCenter = show;
    layout();
  }

}