public void DoMultiSelect(Point pt)
{
shapes = new List <Shape>();
RectangleGeometry HitTestArea = new RectangleGeometry(new Rect(
Canvas.GetLeft(activeShape), Canvas.GetTop(activeShape),
activeShape.Width, activeShape.Height));
VisualTreeHelper.HitTest(canvas, null,
result =>
{
var shape = result.VisualHit as Shape;
if (shape != null && shape != activeShape)
{
shapes.Add(shape);
}
return(HitTestResultBehavior.Continue);
},
new GeometryHitTestParameters(HitTestArea));
if (shapes.Count > 0)
{
DoubleCollection dc = new DoubleCollection(2);
dc.Add(2); dc.Add(2);
pointsInitial = new List <Point>();
foreach (Shape shape in shapes)
{
shape.StrokeDashArray = dc;
pointsInitial.Add(new Point(Canvas.GetLeft(shape), Canvas.GetTop(shape)));
}
pointStart = pt;
}
DeactivateShape();
toolMode = NToolMode.Move;
}
public void DoSelect(Point pt, bool doubleclick = false)
{
DeactivateShape();
HitTestResult result = VisualTreeHelper.HitTest(canvas, pt);
if (result != null && result.VisualHit is Shape)
{
activeShape = (result.VisualHit as Shape);
DoubleCollection dc = new DoubleCollection(2);
dc.Add(2); dc.Add(2);
activeShape.StrokeDashArray = dc;
pointInitial = new Point(Canvas.GetLeft(activeShape), Canvas.GetTop(activeShape));
pointStart = pt;
if (activeShape is Polyline)
{//start polyline editing
linePointIndex = GetPolylinePointIndex(activeShape as Polyline, pt, doubleclick);
}
}
else
{
toolMode = NToolMode.Pan;
pointInitial = new Point((canvas.RenderTransform as TranslateTransform).X, (canvas.RenderTransform as TranslateTransform).Y);
pointStart = canvas.TranslatePoint(pt, null);
Debug.WriteLine("start pan: " + pointStart);
canvas.CaptureMouse();
}
}
public void MouseDown(Point pt, bool multiselect, bool doubleclick)
{
if (multiselect)
{
toolMode = NToolMode.MultiSelect;
}
switch (toolMode)
{
case NToolMode.Rect: DoRect(pt); break;
case NToolMode.Select: DoSelect(pt, doubleclick); break;
case NToolMode.Pan: DoSelect(pt, doubleclick); break;
case NToolMode.Delete: DoDelete(pt); break;
case NToolMode.Scale: DoScale(pt); break;
case NToolMode.Rotate: DoRotate(pt); break;
case NToolMode.Line: DoLine(pt); break;
case NToolMode.Move: pointStart = pt; break;
case NToolMode.MultiSelect:
DoRect(pt);
activeShape.Fill = new SolidColorBrush();
DoubleCollection dc = new DoubleCollection(2);
dc.Add(5); dc.Add(2);
activeShape.StrokeDashArray = dc;
break;
}
}
public NCanvas(Canvas canvas)
{
toolMode = NToolMode.None;
pointStart = new Point(0, 0);
pointEnd = new Point(0, 0);
lineThickness = 1;
this.canvas = canvas;
activeShape = null;
ConnectDistance = 5;
}
