wpf中怎么创建圆角矩形标注框?
就是圆角的border,某条边上有个角的那种外框(用来放某人说了哪些话的那种框).因为根据条件边框要变色,用图片很麻烦.有没有办法用xaml或代码实现?
[img=http://storage.live.com/items/A843C5EBD9F7023D!10956][/img]
[最优解释]
class DialogLabel : FrameworkElement
{
VisualCollection childs;
DrawingVisual dv = new DrawingVisual();
Brush bl = new SolidColorBrush(Color.FromArgb(0xff, 0x00, 0xff, 0x00));
Pen p = new Pen(new SolidColorBrush(Color.FromArgb(0xff, 0x00, 0xff, 0x00)), 1);
public DialogLabel()
{
bl.Opacity = 0.5;
p.Brush.Opacity = 0.5;
p.Freeze();
childs = new VisualCollection(this);
using (DrawingContext dc = dv.RenderOpen())
{
List<PathFigure> points = new List<PathFigure>();
PathFigure pf = new PathFigure();
pf.StartPoint = new Point(0, 20);
pf.Segments.Add(new ArcSegment(new Point(20,0),new Size(20,20),90,false,SweepDirection.Clockwise,true));
pf.Segments.Add(new LineSegment(new Point(80, 0), true));
pf.Segments.Add(new ArcSegment(new Point(100, 20), new Size(20, 20), 90, false, SweepDirection.Clockwise, true));
pf.Segments.Add(new LineSegment(new Point(100, 60), true));
pf.Segments.Add(new ArcSegment(new Point(80, 80), new Size(20, 20), 90, false, SweepDirection.Clockwise, true));
pf.Segments.Add(new LineSegment(new Point(48, 80), true));
pf.Segments.Add(new LineSegment(new Point(40, 100), true));
pf.Segments.Add(new LineSegment(new Point(32, 80), true));
pf.Segments.Add(new LineSegment(new Point(20, 80), true));
pf.Segments.Add(new ArcSegment(new Point(0, 60), new Size(20, 20), 90, false, SweepDirection.Clockwise, true));
pf.IsClosed = true;
points.Add(pf);
Geometry geo = new PathGeometry(points);
dc.DrawGeometry(bl, p, geo);
}
childs.Add(dv);
}
protected override int VisualChildrenCount
{
get
{
return childs.Count;
}
}
protected override Visual GetVisualChild(int index)
{
return childs[index];
}
}
