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 PlayStopButton_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Stop
if (SceneUC.IsPlaying)
{
PlayStopButton.Source = new BitmapImage(new Uri(@"./Images/PlayButton.png", UriKind.Relative));
foreach (var ui in ControlUIs)
{
ui.IsEnabled = true;
}
SceneUC.Stop();
}
// Play
else
{
if (InputGravity == null)
{
MessageBox.Show("重力加速度参数不合法");
return;
}
if (SceneUC.Scene.Ball == null)
{
MessageBox.Show("未放置小球");
return;
}
if (SceneUC.Scene.Flipper == null)
{
MessageBox.Show("未放置挡板");
return;
}
PlayStopButton.Source = new BitmapImage(new Uri(@"./Images/StopButton.png", UriKind.Relative));
SceneUC.Scene.Gravity = InputGravity.Value;
SceneUC.Scene.Ball.Speed = SpeedBoardUC.Speed;
if (SceneUC.Scene.Flipper != null)
{
SceneUC.Scene.Flipper.Speed = Vector2.Zero;
}
foreach (var ui in ControlUIs)
{
ui.IsEnabled = false;
}
SceneUC.Play();
}
}
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;
}