public void LeftMouseDownEventHandler(CanvasPoint mouseCoordinate)
{
if (!ViewModelMediator.MovingMode && ViewModelMediator.SelectedShapeType == ShapeType.FreeHand)
{
ViewModelMediator.RaiseViewModelEvent(this, ViewModelMediator.ViewModelEvent.DrawingStarted);
drawn = false; // new drawing started
ShapeViewModel shapeVM = CreateShapeVM();
if (shapeVM.Shape is Polyline polyLine)
{
polyLine.Points.Add(new System.Windows.Point(mouseCoordinate.AbsolutePoint.X, mouseCoordinate.AbsolutePoint.Y));
}
Shapes.Add(shapeVM);
}
}
public void LeftMouseUpEventHandler(CanvasPoint mouseCoordinate)
{
if (!ViewModelMediator.MovingMode && ViewModelMediator.SelectedShapeType != ShapeType.FreeHand)
{
if (firstPoint == null)
{
ViewModelMediator.RaiseViewModelEvent(this, ViewModelMediator.ViewModelEvent.DrawingStarted);
drawn = false; // new drawing started
ShapeViewModel shapeVM = CreateShapeVM();
firstPoint = mouseCoordinate.AbsolutePoint;
if (shapeVM.Shape is Line line)
{
line.X1 = firstPoint.X;
line.Y1 = firstPoint.Y;
line.X2 = firstPoint.X;
line.Y2 = firstPoint.Y;
Shapes.Add(shapeVM);
}
else
{
shapeVM.Shape.Width = 0;
shapeVM.Shape.Height = 2;
shapeVM.Shape.RenderTransform = new TranslateTransform(firstPoint.X, firstPoint.Y);
Shapes.Add(shapeVM);
ShapeViewModel tempLineVM = CreateShapeVM(ShapeType.Line);
Line tempLine = tempLineVM.Shape as Line;
tempLine.X1 = firstPoint.X;
tempLine.Y1 = firstPoint.Y;
tempLine.X2 = firstPoint.X;
tempLine.Y2 = firstPoint.Y;
Shapes.Add(tempLineVM);
}
}
else if (secondPoint == null)
{
secondPoint = mouseCoordinate.AbsolutePoint;
if (ViewModelMediator.SelectedShapeType == ShapeType.Line)
{
Shape shape = Shapes.Last().Shape;
(shape as Line).X2 = secondPoint.X;
(shape as Line).Y2 = secondPoint.Y;
drawn = true;
firstPoint = secondPoint = null;
ViewModelMediator.RaiseViewModelEvent(this,
ViewModelMediator.ViewModelEvent.DrawingEnded);
}
else
{
Shapes.Remove(Shapes.Last());
Shape shape = Shapes.Last().Shape;
var angle = Math.Atan((secondPoint.Y - firstPoint.Y) / (secondPoint.X - firstPoint.X));
var rotate = new RotateTransform(angle * 180 / 3.14);
rotate.CenterX = (firstPoint.X + secondPoint.X) / 2;
rotate.CenterY = (firstPoint.Y + secondPoint.Y) / 2;
shape.RenderTransform = rotate;
}
}
else
{
drawn = true;
firstPoint = secondPoint = null;
ViewModelMediator.RaiseViewModelEvent(this,
ViewModelMediator.ViewModelEvent.DrawingEnded);
}
}
}