用tooltip实现winform中的层的概念,在tooltip中绘制图形

来源：互联网发布：hubner软件编辑：程序博客网时间：2024/05/29 08:42

今天做个项目,想将用户体验做好点,涉及到tooltip显示图片,查阅msdn后写出如下代码:效果不错:D(<==自我感觉良好= =#)呵呵!

完成以后猛然发现这个效果不正是前段时间苦苦寻觅的winform中的"层"效果吗?T_T 100分就这样飘远了~~

直奔主题

 private void Form1_Load(object sender, EventArgs e)
        {
            this.toolTip1.SetToolTip( button1,"hi there!");
            
        }
        private void toolTip1_Draw(object sender, DrawToolTipEventArgs e)
        {
            if (e.AssociatedControl == button1)
            {
                
                e.DrawBackground();
                e.Graphics.DrawLines(SystemPens.ControlLightLight, new Point[] {
                    new Point (0, e.Bounds.Height - 1), 
                    new Point (0, 0), 
                    new Point (e.Bounds.Width - 1, 0)
                });
                
                e.Graphics.DrawImage(bit, new Point(0, 0));
                
                e.Graphics.DrawLines(SystemPens.ControlDarkDark, new Point[] {
                    new Point (0, e.Bounds.Height - 1), 
                    new Point (e.Bounds.Width - 1, e.Bounds.Height - 1), 
                    new Point (e.Bounds.Width - 1, 0)
                });
                // Specify custom text formatting flags. 
                TextFormatFlags sf = TextFormatFlags.Right;//| 
                                     //TextFormatFlags.HorizontalCenter | 
                                     //TextFormatFlags.NoFullWidthCharacterBreak; 
                // Draw the standard text with customized formatting options. 
                e.DrawText(sf);
                
                
            }
        }
        Bitmap bit;
        private void toolTip1_Popup(object sender, PopupEventArgs e)
        {
            bit = new Bitmap(@"C:/Documents and Settings/Administrator/My Documents/My Pictures/e/resizable.gif");
            int widt = TextRenderer.MeasureText(toolTip1.GetToolTip(e.AssociatedControl), this.Font).Width;
            Size si = new Size(bit.Width+widt+20,bit.Height);
            e.ToolTipSize = si;
        }