void DragThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
DesignerItem designerItem = this.DataContext as DesignerItem;
DesignerCanvas designer = VisualTreeHelper.GetParent(designerItem) as DesignerCanvas;
if (designerItem != null && designer != null && designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
// we only move DesignerItems
var designerItems = from item in designer.SelectedItems
where item is DesignerItem
select item;
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
minLeft = double.IsNaN(left) ? 0 : Math.Min(left, minLeft);
minTop = double.IsNaN(top) ? 0 : Math.Min(top, minTop);
}
double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
double deltaVertical = Math.Max(-minTop, e.VerticalChange);
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
if (double.IsNaN(left))
{
left = 0;
}
if (double.IsNaN(top))
{
top = 0;
}
Canvas.SetLeft(item, left + deltaHorizontal);
Canvas.SetTop(item, top + deltaVertical);
}
designer.InvalidateMeasure();
e.Handled = true;
}
}
void DragThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
CircuitPart circuitPart = this.DataContext as CircuitPart;
DesignerCanvas designer = VisualTreeHelper.GetParent(circuitPart) as DesignerCanvas;
if (circuitPart != null && designer != null && circuitPart.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
// we only move CircuitPart
var circuitParts = designer.SelectionService.CurrentSelection.OfType <CircuitPart>();
foreach (CircuitPart item in circuitParts)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
minLeft = double.IsNaN(left) ? 0 : Math.Min(left, minLeft);
minTop = double.IsNaN(top) ? 0 : Math.Min(top, minTop);
}
double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
double deltaVertical = Math.Max(-minTop, e.VerticalChange);
foreach (CircuitPart item in circuitParts)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
if (double.IsNaN(left))
{
left = 0;
}
if (double.IsNaN(top))
{
top = 0;
}
Canvas.SetLeft(item, left + deltaHorizontal);
Canvas.SetTop(item, top + deltaVertical);
}
designer.InvalidateMeasure();
e.Handled = true;
}
}
private void DragThumb_DragCompleted(object sender, DragCompletedEventArgs e)
{
if (designer == null)
{
return;
}
var container = designer.ItemContainerGenerator.ContainerFromItem(destItem) as UIElement;
if (container == null)
{
return;
}
if (!instantPreview)
{
var tf = TransformToAncestor((Visual)Parent);
var delta = new Point(e.HorizontalChange, e.VerticalChange);
delta = tf.Transform(delta);
var minLeft = double.MaxValue;
var minTop = double.MaxValue;
foreach (var item in designer.SelectedItems.OfType <IBoxCanvasItem>())
{
var left = item.Left;
var top = item.Top;
minLeft = double.IsNaN(left) ? 0 : Math.Min(left, minLeft);
minTop = double.IsNaN(top) ? 0 : Math.Min(top, minTop);
}
var deltaHorizontal = Math.Max(-minLeft, delta.X);
var deltaVertical = Math.Max(-minTop, delta.Y);
foreach (var item in designer.SelectedItems.OfType <IBoxCanvasItem>())
{
if (item == destItem)
{
continue;
}
item.NotifyUserDragging(deltaHorizontal, deltaVertical);
item.Left += deltaHorizontal;
item.Top += deltaVertical;
}
}
foreach (var item in designer.SelectedItems)
{
item.NotifyUserDraggingStarted();
}
designer.InvalidateMeasure();
}