TabControl tab绘制关闭按钮
2013-09-25 09:22
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const int CLOSE_SIZE = 15; //tabPage标签图片 Bitmap image = new Bitmap(@"C:\Documents and Settings\Administrator\桌面\1.gif"); private void TabTest_Load(object sender, EventArgs e) { //清空控件 //this.MainTabControl.TabPages.Clear(); //绘制的方式OwnerDrawFixed表示由窗体绘制大小也一样 this.MainTabControl.DrawMode = TabDrawMode.OwnerDrawFixed; this.MainTabControl.Padding = new System.Drawing.Point(CLOSE_SIZE, CLOSE_SIZE); this.MainTabControl.DrawItem += new DrawItemEventHandler(this.MainTabControl_DrawItem); this.MainTabControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDown); } //绘制“X”号即关闭按钮 private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e) { try { Rectangle myTabRect = this.MainTabControl.GetTabRect(e.Index); //先添加TabPage属性 e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, SystemBrushes.ControlText, myTabRect.X + 2, myTabRect.Y + 2); //再画一个矩形框 using (Pen p = new Pen(Color.White)) { myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2); myTabRect.Width = CLOSE_SIZE; myTabRect.Height = CLOSE_SIZE; e.Graphics.DrawRectangle(p, myTabRect); } //填充矩形框 Color recColor = e.State == DrawItemState.Selected ? Color.White : Color.White; using (Brush b = new SolidBrush(recColor)) { e.Graphics.FillRectangle(b, myTabRect); } //画关闭符号 using (Pen objpen = new Pen(Color.Black)) { ////============================================= //自己画X ////"\"线 //Point p1 = new Point(myTabRect.X + 3, myTabRect.Y + 3); //Point p2 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + myTabRect.Height - 3); //e.Graphics.DrawLine(objpen, p1, p2); ////"/"线 //Point p3 = new Point(myTabRect.X + 3, myTabRect.Y + myTabRect.Height - 3); //Point p4 = new Point(myTabRect.X + myTabRect.Width - 3, myTabRect.Y + 3); //e.Graphics.DrawLine(objpen, p3, p4); ////============================================= //使用图片 Bitmap bt = new Bitmap(image); Point p5 = new Point(myTabRect.X, 4); e.Graphics.DrawImage(bt, p5); //e.Graphics.DrawString(this.MainTabControl.TabPages[e.Index].Text, this.Font, objpen.Brush, p5); } e.Graphics.Dispose(); } catch (Exception) { } } //关闭按钮功能 private void MainTabControl_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { int x = e.X, y = e.Y; //计算关闭区域 Rectangle myTabRect = this.MainTabControl.GetTabRect(this.MainTabControl.SelectedIndex); myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2); myTabRect.Width = CLOSE_SIZE; myTabRect.Height = CLOSE_SIZE; //如果鼠标在区域内就关闭选项卡 bool isClose = x > myTabRect.X && x < myTabRect.Right && y > myTabRect.Y && y < myTabRect.Bottom; if (isClose == true) { this.MainTabControl.TabPages.Remove(this.MainTabControl.SelectedTab); } } }
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