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using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;
namespace CBR.Components.Designer
{
public class RubberbandAdorner : Adorner
{
private Point? startPoint, endPoint;
private Rectangle rubberband;
private DesignerCanvas designerCanvas;
private VisualCollection visuals;
private Canvas adornerCanvas;
protected override int VisualChildrenCount
{
get
{
return this.visuals.Count;
}
}
public RubberbandAdorner(DesignerCanvas designerCanvas, Point? dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
this.startPoint = dragStartPoint;
this.adornerCanvas = new Canvas();
this.adornerCanvas.Background = Brushes.Transparent;
this.visuals = new VisualCollection(this);
this.visuals.Add(this.adornerCanvas);
this.rubberband = new Rectangle();
this.rubberband.Stroke = Brushes.Navy;
this.rubberband.StrokeThickness = 1;
this.rubberband.StrokeDashArray = new DoubleCollection(new double[] { 2 });
this.adornerCanvas.Children.Add(this.rubberband);
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
if (!this.IsMouseCaptured)
{
this.CaptureMouse();
}
this.endPoint = e.GetPosition(this);
this.UpdateRubberband();
this.UpdateSelection();
e.Handled = true;
}
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
if (this.IsMouseCaptured)
{
this.ReleaseMouseCapture();
}
AdornerLayer adornerLayer = this.Parent as AdornerLayer;
if (adornerLayer != null)
{
adornerLayer.Remove(this);
}
}
protected override Size ArrangeOverride(Size arrangeBounds)
{
this.adornerCanvas.Arrange(new Rect(arrangeBounds));
return arrangeBounds;
}
protected override Visual GetVisualChild(int index)
{
return this.visuals[index];
}
private void UpdateRubberband()
{
double left = Math.Min(this.startPoint.Value.X, this.endPoint.Value.X);
double top = Math.Min(this.startPoint.Value.Y, this.endPoint.Value.Y);
double width = Math.Abs(this.startPoint.Value.X - this.endPoint.Value.X);
double height = Math.Abs(this.startPoint.Value.Y - this.endPoint.Value.Y);
this.rubberband.Width = width;
this.rubberband.Height = height;
Canvas.SetLeft(this.rubberband, left);
Canvas.SetTop(this.rubberband, top);
}
private void UpdateSelection()
{
Rect rubberBand = new Rect(this.startPoint.Value, this.endPoint.Value);
foreach (DesignerItem item in this.designerCanvas.Children)
{
Rect itemRect = VisualTreeHelper.GetDescendantBounds(item);
Rect itemBounds = item.TransformToAncestor(designerCanvas).TransformBounds(itemRect);
if (rubberBand.Contains(itemBounds))
{
item.IsSelected = true;
}
else
{
item.IsSelected = false;
}
}
}
}
}
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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.
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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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