protected virtual void FirstPoint(QuadDocument document, QuadCanvas canvas, Point point)
{
quadrilateral = CreateQuadrilateral();
quadrilateral.Points.Add(point);
quadrilateral.Points.Add(point);
document.Quads.Add(quadrilateral);
}
public override void MouseLeftButtonDown(QuadDocument document, QuadCanvas canvas, System.Windows.Input.MouseButtonEventArgs e)
{
startPoint = e.GetPosition(canvas);
QuadCanvasItem item = canvas.GetItemHit(startPoint);
bool shifyKeyPressed = Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift);
if (item != null)
{
if (shifyKeyPressed)
{
canvas.SelectedItems.Add(item.Quadrilateral);
}
else
{
canvas.SelectedItem = item.Quadrilateral;
}
}
else
{
if (!shifyKeyPressed)
{
canvas.SelectedItem = null;
}
inMove = false;
}
}
public override void Deactivate(QuadDocument document, QuadCanvas canvas)
{
base.Deactivate(document, canvas);
if (quadrilateral != null)
{
document.Quads.Remove(quadrilateral);
}
}
protected virtual void ThirdPoint(QuadDocument document, QuadCanvas canvas, Point point)
{
Point thirdPoint = ConstrainThirdPoint(
quadrilateral.Points[0],
quadrilateral.Points[1],
point);
quadrilateral.Points.Add(thirdPoint);
}
public override void MouseMove(QuadDocument document, QuadCanvas canvas, MouseEventArgs e)
{
if (quadrilateral != null)
{
Point currentPoint = e.GetPosition(canvas);
if (quadrilateral.Points.Count == 3)
{
currentPoint = ConstrainThirdPoint(quadrilateral.Points[0],
quadrilateral.Points[1],
currentPoint);
}
if (quadrilateral.Points[quadrilateral.Points.Count - 1] != currentPoint)
{
quadrilateral.Points[quadrilateral.Points.Count - 1] = currentPoint;
}
}
}
public override void MouseLeftButtonUp(QuadDocument document, QuadCanvas canvas, MouseButtonEventArgs e)
{
if (quadrilateral == null)
{
FirstPoint(document, canvas, e.GetPosition(canvas));
}
else
{
switch (quadrilateral.Points.Count - 1)
{
case 1:
SecondPoint(document, canvas, e.GetPosition(canvas));
break;
case 2:
ThirdPoint(document, canvas, e.GetPosition(canvas));
break;
case 3:
FourthPoint(document, canvas, e.GetPosition(canvas));
break;
}
}
}
public virtual void MouseLeave(QuadDocument document, QuadCanvas canvas, MouseEventArgs e)
{
canvas.Cursor = Cursors.Arrow;
}
public abstract void MouseMove(QuadDocument document, QuadCanvas canvas, MouseEventArgs e);
public virtual void MouseLeftButtonDown(QuadDocument document, QuadCanvas quadCanvas, MouseButtonEventArgs e)
{
}
public abstract void MouseLeftButtonUp(QuadDocument document, QuadCanvas canvas, MouseButtonEventArgs e);
public virtual void Deactivate(QuadDocument document, QuadCanvas canvas)
{
}
public override void MouseLeftButtonUp(QuadDocument document, QuadCanvas canvas, MouseButtonEventArgs e)
{
inMove = false;
}
protected virtual void SecondPoint(QuadDocument document, QuadCanvas canvas, Point point)
{
quadrilateral.Points.Add(point);
}
public override void MouseMove(QuadDocument document, QuadCanvas canvas, MouseEventArgs e)
{
if (inMove)
{
}
}
public virtual void MouseEnter(QuadDocument document, QuadCanvas canvas, MouseEventArgs e)
{
canvas.Cursor = GetCursor();
}
protected override void ThirdPoint(QuadDocument document, QuadCanvas canvas, Point point)
{
base.ThirdPoint(document, canvas, point);
FourthPoint(document, canvas, Parallelogram.CalculateFourthPoint(quadrilateral.Points[0], quadrilateral.Points[1], quadrilateral.Points[2]));
}
protected virtual void FourthPoint(QuadDocument document, QuadCanvas canvas, Point point)
{
quadrilateral.Points.Add(point);
quadrilateral = null;
}