private Point mouseOffset; // 鼠标指针与被拖图片位置间的偏差值
/// <summary>
/// 对一个RigidbodyUC进行注册，使之能够被拖动、右键旋转
/// </summary>
/// <param name="rigidbodyUC"></param>
public void Register(RigidbodyUC rigidbodyUC)
{
rigidbodyUC.MouseLeftButtonDown += (o1, e1) =>
{
e1.Handled = true;
draged = (o1 as RigidbodyUC);
mouseOffset = e1.GetPosition(draged);
lastPosition = draged.TranslatePoint(new Point(0, 0), SceneUC);
if (draged.Parent == SceneUC.MainCanvas)
{
SceneUC.RemoveRigidbodyUC(draged);
MainGrid.Children.Add(draged);
}
draged.SetValue(Panel.ZIndexProperty, 5);
};
rigidbodyUC.MouseRightButtonDown += (o1, e1) => (o1 as RigidbodyUC).Rigidbody.Rotate();
}
private void Window_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (draged == null)
{
return;
}
draged.SetValue(Panel.ZIndexProperty, 0);
var pos = draged.TranslatePoint(new Point(0, 0), SceneUC);
MainGrid.Children.Remove(draged);
draged.Rigidbody.Position = new Vector2((int)(pos.X / SceneUC.BlockWidth + 0.5),
(int)(pos.Y / SceneUC.BlockHeight + 0.5));
if (SceneUC.AddRigidbodyUC(draged) == false)
{
draged.Rigidbody.Position = new Vector2((int)(lastPosition.X / SceneUC.BlockWidth + 0.5),
(int)(lastPosition.Y / SceneUC.BlockHeight + 0.5));
SceneUC.AddRigidbodyUC(draged);
}
draged = null;
}
private void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
e.Handled = true;
Image shape = sender as Image;
if (shape == null)
{
return;
}
if (InputSize == null)
{
MessageBox.Show("尺寸参数不合法");
return;
}
Vector2 inputSize = InputSize.Value;
// 在原图的位置生成一个障碍UC
var position = shape.TranslatePoint(new Point(0, 0), MainGrid);
RigidbodyUC obstacle = new RigidbodyUC();
switch (shape.Name)
{
case "BallImage":
if (SceneUC.Scene.Ball != null)
{
return;
}
obstacle.Rigidbody = new Ball()
{
Size = new Vector2(1, 1),
};
break;
case "FlipperImage":
if (SceneUC.Scene.Flipper != null)
{
return;
}
obstacle.Rigidbody = new Flipper()
{
Size = inputSize,
};
break;
case "DestroyerImage":
obstacle.Rigidbody = new Destroyer()
{
Size = inputSize,
};
break;
case "RectangleImage":
obstacle.Rigidbody = new Physics.Rectangle()
{
Size = inputSize,
};
break;
case "TriangleImage":
obstacle.Rigidbody = new Triangle()
{
Size = inputSize,
};
break;
case "CircleImage":
obstacle.Rigidbody = new Circle()
{
Size = inputSize,
};
break;
default:
return;
}
obstacle.Height = SceneUC.BlockHeight * obstacle.Rigidbody.Size.y;
obstacle.Width = SceneUC.BlockWidth * obstacle.Rigidbody.Size.x;
obstacle.HorizontalAlignment = HorizontalAlignment.Left;
obstacle.VerticalAlignment = VerticalAlignment.Top;
obstacle.Margin = new Thickness(position.X, position.Y, 0, 0);
MainGrid.Children.Add(obstacle);
// 实现拖动功能
// 拖动时父对象为MainGrid
// 拖动后若坐标合法则父对象为SceneUC.MainCanvas
// 不合法则删除
draged = obstacle;
lastPosition = obstacle.TranslatePoint(new Point(0, 0), SceneUC);
mouseOffset = new Point(obstacle.Width / 2, obstacle.Height / 2);
Register(obstacle);
}
