private void root_MouseMove(object sender, MouseEventArgs e)
{
var element = sender as FrameworkElement;
if (element != null && (CurrentElement == null && (bool)element.GetValue(EditModeAttachedProperty)))
{
ShowArrows(element);
}
if (!ValidateElement(element))
{
return;
}
if (_transformX || _transformY)
{
var minHeight = RowDefinitions.Min(rd => rd.ActualHeight);
var minLength = ColumnDefinitions.Min(rd => rd.ActualWidth);
var mouseDelta = Mouse.GetPosition(this);
mouseDelta.Offset(-_mouseOffset.X, -_mouseOffset.Y);
if (CurrentElement != null)
{
var scaleY = 1 +
(Math.Abs(_renderOriginY - 1.0) < double.Epsilon ? -1 : 1) * mouseDelta.Y /
CurrentElement.RenderSize.Height;
var scaleX = 1 +
(Math.Abs(_renderOriginX - 1.0) < double.Epsilon ? -1 : 1) * mouseDelta.X /
CurrentElement.RenderSize.Width;
if (RenderSize.Height * scaleY <= minHeight || RenderSize.Width * scaleX <= minLength)
{
UnsafeMethods.SetCursorPos(_prevPosition.X, _prevPosition.Y);
return;
}
var scale = ((TransformGroup)CurrentElement.RenderTransform).Children.OfType <ScaleTransform>().First();
CurrentElement.RenderTransformOrigin = new Point(_renderOriginX, _renderOriginY);
if (_transformY)
{
scale.ScaleY = scaleY;
}
if (_transformX)
{
scale.ScaleX = scaleX; // < 1 ? 1.0 : scaleX;
}
}
}
else
{
var mouseDelta = Mouse.GetPosition(this);
mouseDelta.Offset(-_mouseOffset.X, -_mouseOffset.Y);
if (element != null)
{
element.Margin = new Thickness(
Margin.Left + mouseDelta.X,
Margin.Top + mouseDelta.Y,
Margin.Right - mouseDelta.X,
Margin.Bottom - mouseDelta.Y);
}
}
UnsafeMethods.GetCursorPos(ref _prevPosition);
int col;
int row;
GetPosition(out col, out row);
// notify about all movements
if (ControlChanging != null)
{
var newState = GetCurrentControlState(element, col, row);
OnControlChanging(newState, CheckCollisions(newState));
}
e.Handled = true;
}