【发布时间】:2016-11-14 21:24:44
【问题描述】:
我正在定义继承自 Shape 类并实现“几何”属性的形状。
这是一个例子:
public class Landmark : Shape
{
public override bool IsInBounds(Point currentLocation)
{
return (((currentLocation.X >= Location.X - 3) && (currentLocation.X <= Location.X + 3)) && ((currentLocation.Y >= Location.Y - 3) && (currentLocation.Y <= Location.Y + 3)));
}
protected override Geometry DefiningGeometry
{
get
{
var landMark = new EllipseGeometry {Center = Location};
Stroke = Brushes.Red;
return landMark;
}
}
protected override void OnIsMouseDirectlyOverChanged(DependencyPropertyChangedEventArgs e)
{
StrokeThickness = IsMouseDirectlyOver ? 12 : 6;
Mouse.OverrideCursor = IsMouseDirectlyOver ? Mouse.OverrideCursor = Cursors.ScrollAll : Mouse.OverrideCursor = Cursors.Arrow;
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
Location = e.GetPosition(this);
InvalidateVisual();
}
}
}
当我单击 Shape 并移动鼠标时,我希望 Shape 会在新位置重新绘制 - 它确实有效。
但是,如果我“过快”移动鼠标,那么我将“离开”OnMouseMove 事件,并且shape 卡在鼠标指针和Shape 的最后一个位置位置处于“同步”状态。
这样的问题能解决吗?
【问题讨论】:
标签: c# wpf shape mousemove onmousemove