editableheaderui.java

来自「tame,扩展了好多SWing组件:JTable」· Java 代码 · 共 78 行

/* (swing1.1.1) */
package tame.table;

import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;

import javax.swing.SwingUtilities;
import javax.swing.event.MouseInputListener;
import javax.swing.plaf.basic.BasicTableHeaderUI;
import javax.swing.table.TableColumnModel;

/**
@author Nobuo Tamemasa
@version 1.0 08/21/99
*/
public class EditableHeaderUI extends BasicTableHeaderUI {

  protected MouseInputListener createMouseInputListener() {
    return new MouseInputHandler((EditableHeader)header);
  }

  public class MouseInputHandler extends BasicTableHeaderUI.MouseInputHandler {
    private Component dispatchComponent;
    protected EditableHeader header;

    public MouseInputHandler(EditableHeader header) {
      this.header = header;
    }

    private void setDispatchComponent(MouseEvent e) {
      Component editorComponent = header.getEditorComponent();
      Point p = e.getPoint();
      Point p2 = SwingUtilities.convertPoint(header, p, editorComponent);
      dispatchComponent = SwingUtilities.getDeepestComponentAt(editorComponent,
                                                               p2.x, p2.y);
    }

    private boolean repostEvent(MouseEvent e) {
      if (dispatchComponent == null) {
        return false;
      }
      MouseEvent e2 = SwingUtilities.convertMouseEvent(header, e, dispatchComponent);
      dispatchComponent.dispatchEvent(e2);
      return true;
    }

    public void mousePressed(MouseEvent e) {
      if (!SwingUtilities.isLeftMouseButton(e)) {
        return;
      }
      super.mousePressed(e);

      if (header.getResizingColumn() == null) {
        Point p = e.getPoint();
        TableColumnModel columnModel = header.getColumnModel();
        int index = columnModel.getColumnIndexAtX(p.x);
        if (index != -1) {
          if (header.editCellAt(index, e)) {
            setDispatchComponent(e);
            repostEvent(e);
          }
        }
      }
    }

    public void mouseReleased(MouseEvent e) {
      super.mouseReleased(e);
      if (!SwingUtilities.isLeftMouseButton(e)) {
        return;
      }
      repostEvent(e);
      dispatchComponent = null;
    }

  }

}