public void InvokePointerDrag(Vector2 pointerPosition, Vector2 delta)
{
if (PointerDrag != null)
{
PointerDrag.Invoke(this, new PointerDraggedGraphicalElementEventArgs(pointerPosition, delta));
}
}
private void canvasControl_PointerPressed(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{
if (!svgSupported)
{
return;
}
pointerDrag = new PointerDrag(e.GetCurrentPoint(canvasControl).Position);
canvasControl.Invalidate();
}
private void canvasControl_PointerReleased(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{
if (pointerDrag == null)
{
return; // Nothing to do
}
// Commit the shape into the document
CanvasSvgNamedElement newChild = null;
if (CurrentShapeType == ShapeType.Rectangle)
{
Rect r = pointerDrag.GetRectangle();
newChild = svgDocument.Root.CreateAndAppendNamedChildElement("rect");
newChild.SetFloatAttribute("x", (float)r.Left);
newChild.SetFloatAttribute("y", (float)r.Top);
newChild.SetFloatAttribute("width", (float)r.Width);
newChild.SetFloatAttribute("height", (float)r.Height);
}
else if (CurrentShapeType == ShapeType.Ellipse)
{
var ellipse = pointerDrag.GetEllipse();
newChild = svgDocument.Root.CreateAndAppendNamedChildElement("ellipse");
newChild.SetFloatAttribute("cx", ellipse.CenterX);
newChild.SetFloatAttribute("cy", ellipse.CenterY);
newChild.SetFloatAttribute("rx", ellipse.RadiusX);
newChild.SetFloatAttribute("ry", ellipse.RadiusY);
}
else if (CurrentShapeType == ShapeType.Circle)
{
var circle = pointerDrag.GetCircle();
newChild = svgDocument.Root.CreateAndAppendNamedChildElement("circle");
newChild.SetFloatAttribute("cx", circle.Center.X);
newChild.SetFloatAttribute("cy", circle.Center.Y);
newChild.SetFloatAttribute("r", circle.Radius);
}
else if (CurrentShapeType == ShapeType.Line)
{
var start = pointerDrag.StartLocation.ToVector2();
var end = pointerDrag.CurrentLocation.ToVector2();
newChild = svgDocument.Root.CreateAndAppendNamedChildElement("line");
newChild.SetFloatAttribute("x1", start.X);
newChild.SetFloatAttribute("y1", start.Y);
newChild.SetFloatAttribute("x2", end.X);
newChild.SetFloatAttribute("y2", end.Y);
}
newChild.SetColorAttribute("fill", colorPicker.CurrentColor);
newChild.SetColorAttribute("stroke", Colors.Black);
newChild.SetFloatAttribute("stroke-width", 4.0f);
pointerDrag = null;
canvasControl.Invalidate();
}
public void OnDrag(PointerEventData eventData)
{
if (!pointerDown)
{
return;
}
if (eventData.pointerCurrentRaycast.gameObject == null ||
eventData.pointerCurrentRaycast.gameObject.tag != "Brick")
{
return;
}
int index = eventData.pointerCurrentRaycast.gameObject.transform.GetSiblingIndex();
PointerDrag?.Invoke(index);
}
