private void RotateThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
//Initialize the selected widgets' context when first rotate
if (_infoItems.Count <= 0)
{
WidgetViewModBase wdg = designerItem.DataContext as WidgetViewModBase;
if (wdg.IsGroup == false)
{
wdg.CreateNewPropertyMementos();
wdg.PropertyMementos.AddPropertyMemento(new PropertyMemento("RotateAngle", wdg.RotateAngle, wdg.RotateAngle));
_infoItems.Add(wdg);
}
else
{
foreach (WidgetViewModBase item in (wdg as GroupViewModel).WidgetChildren)
{
item.CreateNewPropertyMementos();
item.CreateNewPropertyMementos();
item.PropertyMementos.AddPropertyMemento(new PropertyMemento("RotateAngle", item.RotateAngle, item.RotateAngle));
item.PropertyMementos.AddPropertyMemento(new PropertyMemento("Left", item.Raw_Left, item.Raw_Left));
item.PropertyMementos.AddPropertyMemento(new PropertyMemento("Top", item.Raw_Top, item.Raw_Top));
_infoItems.Add(item);
}
}
}
//Rotate the current widget
if (this.designerItem != null && this.canvas != null)
{
ContentPresenter wrapper = VisualTreeHelper.GetParent(VisualTreeHelper.GetParent(designerItem)) as ContentPresenter;
Point currentPoint = Mouse.GetPosition(this.canvas);
Vector deltaVector = Point.Subtract(currentPoint, this.centerPoint);
double angle = Vector.AngleBetween(this.startVector, deltaVector);
RotateTransform rotateTransform = designerItem.RenderTransform as RotateTransform;
angle = this.initialAngle + Math.Round(angle, 0);
if (angle < 0)
{
angle += 360;
}
else if (angle >= 360)
{
angle -= 360;
}
wrapper.InvalidateMeasure();
if (this.designerItem.IsGroup == true)
{
GroupViewModel group = this.designerItem.DataContext as GroupViewModel;
DesignerCanvas dc = canvas as DesignerCanvas;
foreach (WidgetViewModBase item in group.WidgetChildren)
{
RotateTransform rt = new RotateTransform(); // bw.RenderTransform as RotateTransform;
rt.Angle = angle - groupIntialAngle;
rt.CenterX = groupCenterX;
rt.CenterY = groupCenterY;
double oldAngle = item.RotateAngle;
item.RotateAngle = Convert.ToInt16(angle - groupIntialAngle);
Rect rect1 = rt.TransformBounds(new Rect(item.Left, item.Top, item.ItemWidth, item.ItemHeight));
Rect rect2 = item.RevertBoundingRectangle(rect1);
//item.IsActual = true;
item.Raw_Left = rect2.Left;
item.Raw_Top = rect2.Top;
//only widget can rotate
if (item is WidgetRotateViewModBase)
{
int newAngle = Convert.ToInt16(oldAngle + (angle - groupIntialAngle)) % 360;
if (newAngle < 0)
{
newAngle += 360;
}
else if (angle >= 360)
{
newAngle -= 360;
}
item.RotateAngle = newAngle;
}
else
{
item.RotateAngle = 0;
}
}
group.Refresh();
groupIntialAngle = angle;
}
else
{
rotateTransform.Angle = angle;
}
if (this.designerItem.ParentID != Guid.Empty)
{
IGroupOperation pageVM = canvas.DataContext as IGroupOperation;
pageVM.UpdateGroup(this.designerItem.ParentID);
}
if (this.designerItem.IsGroup)
{
IGroupOperation pageVM = canvas.DataContext as IGroupOperation;
pageVM.UpdateGroup((this.designerItem.DataContext as GroupViewModel).WidgetID);
}
}
}
