jtableheader.java

来自「linux下建立JAVA虚拟机的源码KAFFE」· Java 代码 · 共 775 行 · 第 1/2 页

  /**
   * Creates a default table column model.
   * 
   * @return A default table column model.
   */
  protected TableColumnModel createDefaultColumnModel()
  {
    return new DefaultTableColumnModel();
  }

  /**
   * Get the value of the {@link #accessibleContext} property.
   *
   * @return The current value of the property
   */
  public AccessibleContext getAccessibleContext()
  {
    return accessibleContext;
  }

  /**
   * Get the value of the {@link #columnModel} property.
   *
   * @return The current value of the property
   */
  public TableColumnModel getColumnModel()
  {
    return columnModel;
  }

  /**
   * Get the column that is currently being dragged. This is used when
   * handling the column reordering with mouse.
   *
   * @return the column being dragged, null if none.
   */
  public TableColumn getDraggedColumn()
  {
    return draggedColumn;
  }

  /**
   * Get the value of the {@link #draggedDistance} property.
   *
   * @return The current value of the property
   */
  public int getDraggedDistance()
  {
    return draggedDistance;
  }

  /**
   * Check if it is possible to reorder the table columns by dragging column
   * header with mouse. The table reordering is enabled by default, but can be
   * disabled with {@link #setReorderingAllowed(boolean)}.
   *
   * @return true if reordering is allowed, false otherwise.
   */ 
  public boolean getReorderingAllowed()
  {
    return reorderingAllowed;
  }

  /**
   * Check if it is possible to resize the table columns by dragging the column
   * boundary in the table header with mouse. The resizing is enabled
   * by default, but can be disabled with {@link #setResizingAllowed(boolean)}.
   *
   * @return true if resizing is allowed, false otherwise.
   */ 
  public boolean getResizingAllowed()
  {
    return resizingAllowed;
  }

  /**
   * Get the column that is currently being resized. This is used when
   * handling the column resizing with mouse.
   *
   * @return the column being currently resized, null if none.
   */
  public TableColumn getResizingColumn()
  {
    return resizingColumn;
  }

  /**
   * Get the table, having this header.
   *
   * @return the table, having this header.
   */
  public JTable getTable()
  {
    return table;
  }

  /**
   * Get the value of the {@link #updateTableInRealTime} property.
   *
   * @return The current value of the property
   */
  public boolean getUpdateTableInRealTime()
  {
    return updateTableInRealTime;
  }

  /**
   * Get the value of the {@link #opaque} property.
   *
   * @return The current value of the property
   */
  public boolean isOpaque()
  {
    return opaque;
  }

  /**
   * Set the value of the {@link #columnModel} property.
   *
   * @param c The new value of the property
   */ 
  public void setColumnModel(TableColumnModel c)
  {
    columnModel.removeColumnModelListener(this);
    columnModel = c;
    columnModel.addColumnModelListener(this);
  }

  /**
   * Set the column that is currently being dragged. This is used when
   * dragging the column with mouse. Setting to null will stop the 
   * dragging session immediately.
   *
   * @param draggingIt the column being currently dragged, null if none.
   */ 
  public void setDraggedColumn(TableColumn draggingIt)
  {
    draggedColumn = draggingIt;
  }

  /**
   * Set the value of the {@link #draggedDistance} property.
   *
   * @param d The new value of the property
   */ 
  public void setDraggedDistance(int d)
  {
    draggedDistance = d;
  }

  /**
   * Set the value of the {@link #opaque} property.
   *
   * @param o The new value of the property
   */ 
  public void setOpaque(boolean o)
  {
    opaque = o;
  }

  /**
   * Set the table ability to reorder columns by dragging column header
   * with mouse. The table reordering is enabled by default, but can be
   * disabled with this method.
   *
   * @param allowed true if reordering is allowed, false otherwise.
   */ 
  public void setReorderingAllowed(boolean allowed)
  {
    reorderingAllowed = allowed;
  }

  /**
   * Set the table ability to resize columns by dragging the column
   * boundary in the table header with mouse. The resizing is enabled
   * by default, but can be disabled using this method.
   *
   * @param allowed true if resizing is allowed, false otherwise.
   */ 
  public void setResizingAllowed(boolean allowed)
  {
    resizingAllowed = allowed;
  }

  /**
   * The the column that is currently being resized. This property is used
   * when handling table resizing with mouse. Setting to null would stop
   * the resizing session immediately.
   *
   * @param resizingIt the column being currently resized
   */ 
  public void setResizingColumn(TableColumn resizingIt)
  {
    resizingColumn = resizingIt;
  }

  /**
   * Set the value of the {@link #table} property.
   *
   * @param t The new value of the property
   */ 
  public void setTable(JTable t)
  {
    table = t;
  }

  /**
   * Set the value of the {@link #updateTableInRealTime} property.
   *
   * @param u The new value of the property
   */ 
  public void setUpdateTableInRealTime(boolean u)
  {
    updateTableInRealTime = u;
  }

  /**
   * Creates a default renderer.
   * 
   * @return A default renderer.
   */
  protected TableCellRenderer createDefaultRenderer()
  {
    return new DefaultTableCellRenderer();
  }
  
  /**
   * Returns the default table cell renderer.
   * 
   * @return The default table cell renderer.
   */
  public TableCellRenderer getDefaultRenderer()
  {
    return cellRenderer;
  }

  /**
   * Sets the default table cell renderer.
   * 
   * @param cellRenderer  the renderer.
   */
  public void setDefaultRenderer(TableCellRenderer cellRenderer)
  {
    this.cellRenderer = cellRenderer;
  }
  
  /**
   * Get the rectangle, occupied by the header of the given column.
   * 
   * @param column the column, for that the header area is requested.
   * 
   * @return the column header area.
   */
  public Rectangle getHeaderRect(int column)
  {
    Rectangle r = getTable().getCellRect(-1, column, false);
    r.height = getHeight();
    return r;
  }

  protected String paramString()
  {
    return "JTableHeader";
  }

  // UI support

  public String getUIClassID()
  {
    return "TableHeaderUI";
  }

  public TableHeaderUI getUI()
  {
    return (TableHeaderUI) ui;
  }

  public void setUI(TableHeaderUI u)
  {
    super.setUI(u);
  }

  public void updateUI()
  {
    setUI((TableHeaderUI) UIManager.getUI(this));
  }

  /**
   * Returns the index of the column at the specified point.
   * 
   * @param point  the point.
   * 
   * @return The column index, or -1.
   */
  public int columnAtPoint(Point point)
  {
    if (getBounds().contains(point))
      return columnModel.getColumnIndexAtX(point.x);
    
    return -1;
  }

  /**
   * Receives notification when a column is added to the column model.
   *
   * @param event the table column model event
   */
  public void columnAdded(TableColumnModelEvent event)
  {
    // TODO: What else to do here (if anything)?
    resizeAndRepaint();
  }

  /**
   * Receives notification when a column margin changes in the column model.
   *
   * @param event the table column model event
   */
  public void columnMarginChanged(ChangeEvent event)
  {
    // TODO: What else to do here (if anything)?
    resizeAndRepaint();
  }

  /**
   * Receives notification when a column is moved within the column model.
   *
   * @param event the table column model event
   */
  public void columnMoved(TableColumnModelEvent event)
  {
    // TODO: What else to do here (if anything)?
    resizeAndRepaint();
  }

  /**
   * Receives notification when a column is removed from the column model.
   *
   * @param event the table column model event
   */
  public void columnRemoved(TableColumnModelEvent event)
  {
    // TODO: What else to do here (if anything)?
    resizeAndRepaint();
  }

  /**
   * Receives notification when the column selection has changed.
   *
   * @param event the table column model event
   */
  public void columnSelectionChanged(ListSelectionEvent event)
  {
    // TODO: What else to do here (if anything)?
    resizeAndRepaint();
  }

  /**
   * Validates the layout of this table header and repaints it. This is
   * equivalent to <code>revalidate()</code> followed by
   * <code>repaint()</code>.
   */
  public void resizeAndRepaint()
  {
    revalidate();
    repaint();
  }

  /**
   * Initializes the fields and properties of this class with default values.
   * This is called by the constructors.
   */
  protected void initializeLocalVars()
  {
    accessibleContext = new AccessibleJTableHeader();
    draggedColumn = null;
    draggedDistance = 0;
    opaque = true;
    reorderingAllowed = true;
    resizingAllowed = true;
    resizingColumn = null;
    table = null;
    updateTableInRealTime = true;
    cellRenderer = createDefaultRenderer();
  }
}