Path.Data
您可以通过将 a 数据绑定到 a来绘制各种形状Geometry
。您可以Geometry
从点列表生成。转换器非常适合这种适应。
例如,我通过将Path.Data
属性数据绑定到StreamGeometry
我从视图模型管理的点列表中生成的 a 来绘制螺旋线,它非常适合我的需求:
// ViewModel ...
public class ViewModel
{
[Notify]
public IList<Point> Points { get; set; }
}
// Converter ...
public class GeometryConverter : IValueConverter
{
public Object Convert(Object value, Type targetType, Object parameter, CultureInfo culture)
{
if (value == null || value == DependencyProperty.UnsetValue)
{
return value;
}
var points = (IList<Point>)value;
var i = 0;
var newPath = new StreamGeometry();
using (var context = newPath.Open())
{
var begun = false;
for (var i = 0; i < points.Count; i++)
{
var current = points[i];
if (!begun)
{
begun = true;
context.BeginFigure(current, true, false);
}
else
{
context.ArcTo(current, new Size(radius, radius), angle, false, SweepDirection.Counterclockwise, true, true);
}
}
}
newPath.Freeze();
return newPath.GetFlattenedPathGeometry();
}
}
XAML:
<Canvas>
<Path StrokeThickness="{Binding StrokeWidth}"
Canvas.Top="{Binding Top}"
Canvas.Left="{Binding Left}"
Data="{Binding Points, Converter={StaticResource GeometryConverter}}">
<Path.Stroke>
<SolidColorBrush Color="{Binding CurrentColor}" />
</Path.Stroke>
</Path>
</Canvas>
至于文本,绑定TextBlock
元素并根据需要将它们排列在“画布”上不是更好吗?