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Swing DayDayUp之六: QQ风格JTextField

Posted on 2010-02-09 12:06 zht 阅读(3684) 评论(3)  编辑  收藏 所属分类: Swing

对比图:

效果图:




昨天是相当的郁闷,写程序发泄下,搞了一个qq风格的JTextField,如上图所示
关键知识点
1:
圆角效果
    (1)通过setClip设置剪切区域,只绘制圆角区域
            RoundRectangle2D.Double rect = new RoundRectangle2D.Double(0, 0, this.getWidth(), this.getHeight(), 20, 20);
            g.setClip(rect);
            注意要在super之前设置
    (2)重载paintBorder方法绘制圆角边框
            RoundRectangle2D.Double rect = new RoundRectangle2D.Double(1, 1, this.getWidth() - 2, this.getHeight() - 2, 20, 20);
              g2d.setColor(new Color(0, 100, 100));
              g2d.draw(rect);
2:
查询图标
    (1)重载getInsets方法设置间隙
    (2)重载paintComponent绘制图片和三角箭头
3:
鼠标及事件触发
    (1)光标:添加addMouseMotionListener事件,在mouseMove中设置光标
        if (getIconBounds().contains(e.getPoint())) {
             SearchTextField.this.setCursor(Cursor.getDefaultCursor());
        } else {
             SearchTextField.this.setCursor(Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR));
        }
    (2)鼠标点击search图标事件:添加addMouseListener事件,在mouseClick中弹出菜单或做其它处理
        if (getIconBounds().contains(e.getPoint())) {
                JPopupMenu menu = new ZHTPopupMenu("menu");
                for (int i = 1; i < 6; i++) {
                JCheckBoxMenuItem item = new JCheckBoxMenuItem("item" + i);
                menu.add(item);
            }
            menu.show(SearchTextField.this, getWidth() - 5, getHeight() - 2);
        }

by
         zhangtao

         zht_dream@hotmail.com