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X2、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