private double DistanceBetweenWpfPoints(System.Windows.Point a, System.Windows.Point b)
{
var dx = a.X - b.X;
var dy = a.Y - b.Y;
return(Math.Sqrt(dx * dx + dy * dy));
}
void PanDrawingNodeToMousePosition(Node drawingNode, System.Windows.Point mousePosition)
{
PlaneTransformation transform = graphViewer.Transform;
var nodeCenterOnScreen = transform * drawingNode.GeometryNode.Center;
transform[0, 2] += mousePosition.X - nodeCenterOnScreen.X;
transform[1, 2] += mousePosition.Y - nodeCenterOnScreen.Y;
graphViewer.Transform = transform;
}
void PanToNode()
{
System.Windows.Point mousePosition = Mouse.GetPosition(MainWindow);
Node drawingNode = FindNodeByUsingDialog();
if (drawingNode != null)
{
PanDrawingNodeToMousePosition(drawingNode, mousePosition);
}
}
public void MouseMove(MsaglMouseEventArgs e) {
if (currentPath == null) return;
var point = scroller.GetWpfPosition(e);
if (DistanceBetweenWpfPoints(point, pathEnd) < 3 * currentPath.StrokeThickness) return;
pathEnd = point;
pathSegmentCollection.Add(new LineSegment(point, true));
var pathFigure = new PathFigure(pathStart, pathSegmentCollection, true);
var pathFigureCollection = new PathFigureCollection { pathFigure };
var pathGeometry = new PathGeometry(pathFigureCollection);
currentPath.Data = pathGeometry;
}
void StartNewPath(System.Windows.Point point)
{
var color = new System.Windows.Media.Color();
color.A = 255;
color.R = 255;
currentPath = new Path
{
Stroke = new SolidColorBrush(color),
StrokeEndLineCap = PenLineCap.Round,
StrokeStartLineCap = PenLineCap.Round,
StrokeLineJoin = PenLineJoin.Round,
StrokeThickness = scroller.GetScale()
};
pathSegmentCollection = new PathSegmentCollection();
pathEnd = pathStart = point;
diagram.Canvas.Children.Add(currentPath);
}
void GraphCanvasMouseLeftButtonDown(object sender, MouseEventArgs e)
{
if (MouseDown != null)
{
MouseDown(this, CreateMouseEventArgs(e));
}
if (e.Handled)
{
return;
}
if (!LayoutEditingEnabled || selectedObject == null)
{
panning = true;
mouseDownPointInSource = Mouse.GetPosition(graphCanvas);
graphCanvas.CaptureMouse();
}
}
public void MouseMove(MsaglMouseEventArgs e)
{
if (currentPath == null)
{
return;
}
var point = scroller.GetWpfPosition(e);
if (DistanceBetweenWpfPoints(point, pathEnd) < 3 * currentPath.StrokeThickness)
{
return;
}
pathEnd = point;
pathSegmentCollection.Add(new LineSegment(point, true));
var pathFigure = new PathFigure(pathStart, pathSegmentCollection, true);
var pathFigureCollection = new PathFigureCollection {
pathFigure
};
var pathGeometry = new PathGeometry(pathFigureCollection);
currentPath.Data = pathGeometry;
}
internal static void PositionFrameworkElement(FrameworkElement frameworkElement, System.Windows.Point center, double scale)
{
PositionFrameworkElement(frameworkElement, center.X, center.Y, scale);
}
internal static Point MsaglPoint(System.Windows.Point p)
{
return(new Point(p.X, p.Y));
}
void GraphCanvasMouseLeftButtonDown(object sender, MouseEventArgs e)
{
if (MouseDown != null)
MouseDown(this, CreateMouseEventArgs(e));
if (e.Handled) return;
if (!LayoutEditingEnabled || selectedObject == null) {
panning = true;
mouseDownPointInSource = Mouse.GetPosition(graphCanvas);
graphCanvas.CaptureMouse();
}
}
void StartNewPath(System.Windows.Point point) {
var color=new System.Windows.Media.Color();
color.A=255;
color.R=255;
currentPath = new Path
{
Stroke = new SolidColorBrush(color),
StrokeEndLineCap = PenLineCap.Round,
StrokeStartLineCap = PenLineCap.Round,
StrokeLineJoin = PenLineJoin.Round,
StrokeThickness = scroller.GetScale()
};
pathSegmentCollection = new PathSegmentCollection();
pathEnd = pathStart = point;
diagram.Canvas.Children.Add(currentPath);
}
static Point P2(System.Windows.Point p)
{
return(new Point(p.X, p.Y));
}