void Moving(object sender, System.Windows.Input.MouseEventArgs e)
{
if (isMove && Mouse.LeftButton == MouseButtonState.Released)//鼠标弹起
{
StopMove(sender, e);
return;
}
if (SelectElement == null)
{
return;
}
if (isMove && SelectElement != null)
{
if (!DragPanel.GetCanDrag(SelectElement))
{
return;
}
double oldLeft = Canvas.GetLeft(SelectElement);
double oldTop = Canvas.GetTop(SelectElement);
double elementX = e.GetPosition(this).X - offsetX;
double elementY = e.GetPosition(this).Y - offsetY;
//LimitElement(ref elementX, ref elementY, SelectElement);
Canvas.SetLeft(SelectElement, elementX);
Canvas.SetTop(SelectElement, elementY);
Canvas.SetLeft(rotationEllipse, SelectElement.ActualWidth / 2 - rotationEllipse.Width / 2 + elementX);
Canvas.SetTop(rotationEllipse, SelectElement.ActualHeight / 2 - rotationEllipse.Height / 2 + elementY);
}
}
void elementAdd_Loaded(object sender, RoutedEventArgs e)
{
if (sender is FrameworkElement)
{
if (DragPanel.GetCanDelete((FrameworkElement)sender))
{
AddDeleteContextMenu((FrameworkElement)sender);
}
}
}
void rotationEllipse_MouseMove(object sender, MouseEventArgs e)
{
if (!isRotation || SelectElement == null || !DragPanel.GetCanRotation(SelectElement))
{
return;
}
Point newpoint = e.GetPosition(rotationEllipse);
Point rotationEllipseCenter = new Point(rotationEllipse.Width / 2, rotationEllipse.Height / 2);
double angle = Vector.AngleBetween(newpoint - rotationEllipseCenter, oldpoint - rotationEllipseCenter);//返回角度单位为度，逆时针方向为正（按标准数学定义）
rotationangle += angle;
SelectElement.RenderTransform = new RotateTransform(-rotationangle, SelectElement.ActualWidth / 2, SelectElement.ActualHeight / 2);//旋转变换中顺时针为正
oldpoint = newpoint;
}