winform tabpage 绘制关闭按钮点击关闭事件和双击tab关闭页面

ps:尝试下新的编辑器，看看啥感觉哈。


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说明：

1.button1用于添加tab页面

2.button2用户删除当前tab页面

3.tabcontrol 命名MainTabControl

关键部分：绘制关闭的“x”按钮点击关闭当前tab页面，双击tab标签关闭tab页面。

绘制”x”代码部分(网络上拷贝)

//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))
{
//"\"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);
}

e.Graphics.Dispose();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}

}
//=======================================================================

点击”x”关闭tab页面

//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);
}
}

}

双击选项卡关闭tab页面

private void MainTabControl_MouseDoubleClick(object sender, EventArgs e) {
MainTabControl.TabPages.Remove(MainTabControl.SelectedTab);
}

button1,button2 click事件

private void button1_Click(object sender, EventArgs e)
{
string title = "text";
bool ifExits = false;
foreach (TabPage tb in this.MainTabControl.TabPages) {
if (tb.Text == title) {
ifExits=true;
}
}
if (!ifExits)
{
TabPage tabtage = new TabPage();
tabtage.Text = title;
tabtage.ToolTipText = title;
TemplateForm form = new TemplateForm();
form.FormBorderStyle = FormBorderStyle.None; //隐藏子窗体边框（去除最小花，最大化，关闭等按钮）
form.TopLevel =
false; //指示子窗体非顶级窗体
tabtage.Controls.Add(form);//将子窗体载入panel
form.Show();

MainTabControl.TabPages.Add(tabtage);
MainTabControl.SelectedTab = tabtage;
//image = new Bitmap(TestTabPageTabControl.Properties.Resources.box_okay);
}
}

private void button2_Click(object sender, EventArgs e)
{
if (MainTabControl.SelectedTab != null)
{
MainTabControl.TabPages.Remove(MainTabControl.SelectedTab);
}
}

form load事件

private void testForm_Load(object sender, System.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 / 2);
this.MainTabControl.DrawItem += new DrawItemEventHandler(this.MainTabControl_DrawItem);
this.MainTabControl.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDown);
this.MainTabControl.MouseDoubleClick += new System.Windows.Forms.MouseEventHandler(this.MainTabControl_MouseDoubleClick);
}

代码都比较简单 流程也简单 效果也就不是特别好看 做一个记录，免得忘记了