protected override void OnMouseDoubleClick(MouseButtonEventArgs e)
{
base.OnMouseDoubleClick(e);
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
if (designer != null)
{
double h = designer.ActualHeight / designer.MyRows;
double w = designer.ActualWidth / designer.MyCols;
double left = DesignerCanvas.GetLeft(this);
double top = DesignerCanvas.GetTop(this);
double newleft = System.Math.Floor(left / w) * w;
double newtop = System.Math.Floor(top / h) * h;
double newright = System.Math.Ceiling((left + this.ActualWidth) / w) * w;
double newbottom = System.Math.Ceiling((top + this.ActualHeight) / h) * h;
DesignerCanvas.SetLeft(this, newleft);
DesignerCanvas.SetTop(this, newtop);
this.Width = newright - newleft;
this.Height = newbottom - newtop;
}
}
private void ResizeThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
if (this.designerItem != null && this.designerCanvas != null && this.designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
double minDeltaHorizontal = double.MaxValue;
double minDeltaVertical = double.MaxValue;
double dragDeltaVertical, dragDeltaHorizontal;
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
minLeft = Math.Min(Canvas.GetLeft(item), minLeft);
minTop = Math.Min(Canvas.GetTop(item), minTop);
minDeltaVertical = Math.Min(minDeltaVertical, item.ActualHeight - item.MinHeight);
minDeltaHorizontal = Math.Min(minDeltaHorizontal, item.ActualWidth - item.MinWidth);
}
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
switch (VerticalAlignment)
{
case VerticalAlignment.Bottom:
dragDeltaVertical = Math.Min(-e.VerticalChange, minDeltaVertical);
double h = item.ActualHeight - dragDeltaVertical;
if (DesignerCanvas.GetTop(item) + h < this.designerCanvas.ActualHeight)
{
item.Height = h;
}
break;
case VerticalAlignment.Top:
dragDeltaVertical = Math.Min(Math.Max(-minTop, e.VerticalChange), minDeltaVertical);
Canvas.SetTop(item, Canvas.GetTop(item) + dragDeltaVertical);
item.Height = item.ActualHeight - dragDeltaVertical;
break;
}
switch (HorizontalAlignment)
{
case HorizontalAlignment.Left:
dragDeltaHorizontal = Math.Min(Math.Max(-minLeft, e.HorizontalChange), minDeltaHorizontal);
Canvas.SetLeft(item, Canvas.GetLeft(item) + dragDeltaHorizontal);
item.Width = item.ActualWidth - dragDeltaHorizontal;
break;
case HorizontalAlignment.Right:
dragDeltaHorizontal = Math.Min(-e.HorizontalChange, minDeltaHorizontal);
double w = item.ActualWidth - dragDeltaHorizontal;
if (DesignerCanvas.GetLeft(item) + w < this.designerCanvas.ActualWidth)
{
item.Width = w;
}
break;
}
}
e.Handled = true;
}
}