public override void OnKeyUp(CanvasPanel canvasPanel, KeyEventArgs e)
{
if (e.KeyCode == Keys.Escape && _activePolygon!=null)
{
ShapeCancelledEvent.Invoke(this,new ShapeEventArgs(_activePolygon));
this._activePolygon = null;
canvasPanel.Refresh();
}
}
public override void OnDeactivate(CanvasPanel canvasPanel)
{
if (this._activePolygon!=null)
{
if (!_activePolygon.Created)
{
if (_activePolygon.Vertices.Count >= 3)
_activePolygon.Created = true;
else
canvasPanel.Shapes.Remove(_activePolygon);
}
_activePolygon = null;
canvasPanel.Refresh();
}
}
public override void OnMouseDown(CanvasPanel canvasPanel, MouseEventArgs e)
{
if (_activePolygon == null)
{
_activePolygon = new Polygon(canvasPanel.CurrentColor, canvasPanel.CurrentLineWidth);
canvasPanel.Shapes.Insert(0,_activePolygon);
_activePolygon.AddVertex(e.Location);
}
//Wierzchołek, którym będziemy poruszać
_activePolygon.AddVertex(e.Location);
if (_activePolygon.Created)
ShapeCreatedEvent.Invoke(this,new ShapeEventArgs(_activePolygon));
canvasPanel.Refresh();
}