/// <summary>
/// Initializes a new instance of the <see cref="RubberbandAdorner"/> class
/// </summary>
/// <param name="canvas">Parent canvas</param>
/// <param name="dragStartPoint">Dragging start point</param>
/// <param name="mode">Mode of selection rectangle</param>
public RubberbandAdorner(CustomCanvas canvas, Point?dragStartPoint, SelectionRectnagleModes mode) : base(canvas)
{
this.canvas = canvas;
this.startPoint = dragStartPoint;
// choose color and selection behaviour based on mode
switch (mode)
{
case SelectionRectnagleModes.Selection:
{
this.rubberandBrush = (Brush)Application.Current.FindResource("SelectionBrush");
this.toSelect = true;
break;
}
case SelectionRectnagleModes.ChoiceBox:
{
this.rubberandBrush = (Brush)Application.Current.FindResource("MainItemsBrush");
this.toSelect = false;
break;
}
case SelectionRectnagleModes.Grid:
{
this.rubberandBrush = (Brush)Application.Current.FindResource("MainItemsBrush");
this.toSelect = false;
break;
}
}
this.rubberbandPen = new Pen(this.rubberandBrush, 1);
this.rubberbandPen.DashStyle = new DashStyle(new double[] { 2 }, 1);
}
/// <summary>
/// Handles mouse move on canvas
/// </summary>
/// <param name="e">The event args</param>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.LeftButton != MouseButtonState.Pressed)
{
this.dragStartPoint = null;
}
// add rubberband adorner
if (this.dragStartPoint.HasValue)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
TemplateViewModel dataContext = (TemplateViewModel)this.DataContext;
this.mode = SelectionRectnagleModes.Selection;
if (dataContext.IsAddingChoiceBox)
{
this.mode = SelectionRectnagleModes.ChoiceBox;
}
else if (dataContext.IsAddingGrid)
{
this.mode = SelectionRectnagleModes.Grid;
}
else if (dataContext.IsAddingBarcode)
{
this.mode = SelectionRectnagleModes.Barcode;
}
else if (dataContext.IsAddingClipArea)
{
this.mode = SelectionRectnagleModes.Barcode;
}
RubberbandAdorner adorner = new RubberbandAdorner(this, this.dragStartPoint, this.mode);
adorner.MouseUp += this.AdornerMouseUp;
adornerLayer.Add(adorner);
}
e.Handled = true;
}
}