Java 类org.eclipse.swt.custom.TableTree 实例源码

protected Item newItem(Widget parent, int flags, int ix) {
    TableTreeItem item;
    if (ix >= 0) {
        if (parent instanceof TableTreeItem) {
            item = new TableTreeItem((TableTreeItem) parent, flags, ix);
        } else {
            item = new TableTreeItem((TableTree) parent, flags, ix);
        }
    } else {
        if (parent instanceof TableTreeItem) {
            item = new TableTreeItem((TableTreeItem) parent, flags);
        } else {
            item = new TableTreeItem((TableTree) parent, flags);
        }
    }
    return item;
}

protected Item[] getChildren(Widget o) {
    if (o instanceof TableTreeItem) {
        return ((TableTreeItem) o).getItems();
    }
    if (o instanceof TableTree) {
        return ((TableTree) o).getItems();
    }
    return null;
}

protected Item getChild(Widget widget, int index) {
    if (widget instanceof TableTreeItem) {
        return ((TableTreeItem) widget).getItem(index);
    }
    if (widget instanceof TableTree) {
        return ((TableTree) widget).getItem(index);
    }
    return null;
}

protected void addTreeListener(Control c, TreeListener listener) {
    ((TableTree) c).addTreeListener(listener);
}

protected int getItemCount(Control widget) {
    return ((TableTree) widget).getItemCount();
}

protected Item[] getSelection(Control widget) {
    return ((TableTree) widget).getSelection();
}

protected void removeAll(Control widget) {
    ((TableTree) widget).removeAll();
}

/**
   * Creates and returns the color image data for the given control
   * and RGB value. The image's size is either the control's item extent 
   * or the cell editor's default extent, which is 16 pixels square.
   *
   * @param w the control
   * @param color the color
   */
  private ImageData createColorImage(Control w, RGB color) {

      GC gc = new GC(w);
      FontMetrics fm = gc.getFontMetrics();
      int size = fm.getAscent();
      gc.dispose();

      int indent = 6;
      int extent = DEFAULT_EXTENT;
      if (w instanceof Table) {
    extent = ((Table) w).getItemHeight() - 1;
} else if (w instanceof Tree) {
    extent = ((Tree) w).getItemHeight() - 1;
} else if (w instanceof TableTree) {
    extent = ((TableTree) w).getItemHeight() - 1;
}

      if (size > extent) {
    size = extent;
}

      int width = indent + size;
      int height = extent;

      int xoffset = indent;
      int yoffset = (height - size) / 2;

      RGB black = new RGB(0, 0, 0);
      PaletteData dataPalette = new PaletteData(new RGB[] { black, black,
              color });
      ImageData data = new ImageData(width, height, 4, dataPalette);
      data.transparentPixel = 0;

      int end = size - 1;
      for (int y = 0; y < size; y++) {
          for (int x = 0; x < size; x++) {
              if (x == 0 || y == 0 || x == end || y == end) {
            data.setPixel(x + xoffset, y + yoffset, 1);
        } else {
            data.setPixel(x + xoffset, y + yoffset, 2);
        }
          }
      }

      return data;
  }

/**
 * Creates a table tree viewer on the given table tree control. The viewer
 * has no input, no content provider, a default label provider, no sorter,
 * and no filters.
 * 
 * @param tree
 *            the table tree control
 */
public TableTreeViewer(TableTree tree) {
    super();
    tableTree = tree;
    hookControl(tree);
    tableTreeEditor = new TableTreeEditor(tableTree);
    tableEditorImpl = new TableTreeEditorImpl(this);
}

/**
 * Creates a table tree viewer on a newly-created table tree control under
 * the given parent. The table tree control is created using the given SWT
 * style bits. The viewer has no input, no content provider, a default label
 * provider, no sorter, and no filters.
 * 
 * @param parent
 *            the parent control
 * @param style
 *            the SWT style bits
 */
public TableTreeViewer(Composite parent, int style) {
    this(new TableTree(parent, style));
}

/**
 * Returns this table tree viewer's table tree control.
 * 
 * @return the table tree control
 */
public TableTree getTableTree() {
    return tableTree;
}