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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Documents;
using System.Windows;
using System.Windows.Media;
using System.Windows.Shapes;
namespace CBR.Core.Helpers
{
internal class DragAdorner : Adorner
{
protected UIElement _child;
protected VisualBrush _brush;
protected UIElement _owner;
protected double XCenter;
protected double YCenter;
public DragAdorner(UIElement owner) : base(owner) { }
public DragAdorner(UIElement owner, UIElement adornElement, bool useVisualBrush, double opacity)
: base(owner)
{
System.Diagnostics.Debug.Assert(owner != null);
System.Diagnostics.Debug.Assert(adornElement != null);
_owner = owner;
if (useVisualBrush)
{
VisualBrush _brush = new VisualBrush(adornElement);
_brush.Opacity = opacity;
Rectangle r = new Rectangle();
r.RadiusX = 3;
r.RadiusY = 3;
//TODO: questioning DesiredSize vs. Actual
r.Width = adornElement.DesiredSize.Width;
r.Height = adornElement.DesiredSize.Height;
XCenter = adornElement.DesiredSize.Width / 2;
YCenter = adornElement.DesiredSize.Height / 2;
r.Fill = _brush;
_child = r;
}
else
_child = adornElement;
}
private double _leftOffset;
public double LeftOffset
{
get { return _leftOffset; }
set
{
_leftOffset = value - XCenter;
UpdatePosition();
}
}
private double _topOffset;
public double TopOffset
{
get { return _topOffset; }
set
{
_topOffset = value - YCenter;
UpdatePosition();
}
}
private void UpdatePosition()
{
AdornerLayer adorner = (AdornerLayer)this.Parent;
if (adorner != null)
{
adorner.Update(this.AdornedElement);
}
}
protected override Visual GetVisualChild(int index)
{
return _child;
}
protected override int VisualChildrenCount
{
get
{
return 1;
}
}
protected override Size MeasureOverride(Size finalSize)
{
_child.Measure(finalSize);
return _child.DesiredSize;
}
protected override Size ArrangeOverride(Size finalSize)
{
_child.Arrange(new Rect(_child.DesiredSize));
return finalSize;
}
public double scale = 1.0;
public override GeneralTransform GetDesiredTransform(GeneralTransform transform)
{
GeneralTransformGroup result = new GeneralTransformGroup();
result.Children.Add(base.GetDesiredTransform(transform));
result.Children.Add(new TranslateTransform(_leftOffset, _topOffset));
return result;
}
}
}
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WPF and MVVM fan, I practice C # in all its forms from the beginning of the NET Framework without mentioning C ++ / MFC and other software packages such as databases, ASP, WCF, Web & Windows services, Application, and now Core and UWP.
In my wasted hours, I am guilty of having fathered C.B.R. and its cousins C.B.R. for WinRT and UWP on the Windows store.
But apart from that, I am a great handyman ... the house, a rocket stove to heat the jacuzzi and the last one: a wood oven for pizza, bread, and everything that goes inside
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