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  • 给TabControl中的每个tabpage标题上加X,并且设置tabControl上部除标题外的背景颜色

    最近做项目遇到了一个不小的麻烦,上网找了半天没有找到相关有用资料,索性自己去实现,以解决自己现在遇到的麻烦。同时,

    也能够帮助一下与我有相同问题的人。

    麻烦:
    1、给tabpage加上 关闭按钮X

    2、当设置tabControl的DrawMode 为OwnerDrawFixed时如

    myTabControl.DrawMode = TabDrawMode.OwnerDrawFixed;

    会发现tabControl不会继承它parent的backcolor,而是VS提供的默认颜色,而我现在的项目考虑到VS默认的颜色影响美观,

    所以,希望能够自己设置它的颜色。

    解决方案:

    使用GDI进行自己绘制。在tabpage的标题上绘制关闭按钮X,绘制tabControl中除了标题部分的backcolor。

    1、绘制关闭按钮:

    在tabControl的DrawItem事件中添加如下代码:

    try
    {

    Rectangle myTabRect = this.myTabControl.GetTabRect(e.Index);

    //先添加TabPage属性
    e.Graphics.DrawString(this.myTabControl.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.Black))//自动释放资源
    {
    myTabRect.Offset(myTabRect.Width - (CLOSE_SIZE + 3), 2);
    myTabRect.Width = CLOSE_SIZE;
    myTabRect.Height = CLOSE_SIZE;
    e.Graphics.DrawRectangle(p, 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)
    {

    }

    然后在myTabControl的MouseDown事件中进行填充关闭功能。

    代码如下:

    if (e.Button == MouseButtons.Left)
    {
    int x = e.X, y = e.Y;

    int CLOSE_SIZE=10;

    //计算关闭区域
    Rectangle myTabRect = this.myTabControl.GetTabRect(this.myTabControl.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.myTabControl.TabPages.Remove(this.myTabControl.SelectedTab);
    }
    }

    2、填充tabControl的上部除了TabPage标题的backcolor

    还是在tabControl的DrawItem事件中添加如下代码:

    Graphics g = e.Graphics;
    Rectangle endPageRect = myTabControl.GetTabRect(myTabControl.TabPages.Count - 1); //最后一个标题栏的范围
    Rectangle TitleRect = myTabControl.GetTabRect(e.Index); //当前标题栏的范围
    Rectangle HeaderBackRect = Rectangle.Empty;

    HeaderBackRect = new Rectangle(new Point(endPageRect.X + endPageRect.Width, endPageRect.Y),
    new Size(myTabControl.Width - endPageRect.X - endPageRect.Width, endPageRect.Height));
    Brush b = new SolidBrush(Color.Azure);
    g.FillRectangle(b, HeaderBackRect);

    来自 http://blog.csdn.net/my_2008wing/article/details/5507162

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  • 原文地址:https://www.cnblogs.com/sung/p/2826726.html
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