public EditorState(IChangeDrawingState subject)
{
_subject = subject;
StartAction = new EditorAction((MouseDownPosition) => { });
ContinueAction = new EditorAction((currentMousePosition) => { });
FinishAction = new EditorAction((mouseUpPostion) => { });
_subject.IsOperationInProcess = true;
_captureMouse = true;
}
public RegularTriangleDrawingState(IChangeDrawingState subject) : base(subject)
{
_startDrawing3PointBase = _startActions[2];
_startActions[2] = (mouseDownPosition) =>
{
_startDrawing3PointBase(RegularTriangle3Point(_trianglePoints, mouseDownPosition));
};
_continueDrawing3PointBase = _continueActions[3];
_continueActions[3] = (mouseDownPosition) =>
{
_continueDrawing3PointBase(RegularTriangle3Point(_trianglePoints, mouseDownPosition));
};
}
public TriangleDrawingState(IChangeDrawingState subject) : base(subject)
{
_trianglePoints = new PointCollection();
_startActions = new Dictionary <int, EditorAction>(2);
_startActions[0] = (mouseDownPosition) =>
{
var polyline = new Polyline();
(_subject.CurrentImage.Child as Canvas).Children.Add(polyline);
_subject.CurrentFigure = polyline;
_trianglePoints = new PointCollection();
_trianglePoints.Add(mouseDownPosition);
(_subject.CurrentFigure as Polyline).Points = _trianglePoints;
};
_startActions[2] = (mouseDownPosition) =>
{
_trianglePoints.Add(mouseDownPosition);
var triangle = new Polygon()
{
Focusable = true
};
triangle.Points = _trianglePoints;
var image = _subject.CurrentImage.Child as Canvas;
Canvas.SetTop(triangle, 0);
Canvas.SetLeft(triangle, 0);
image.Children.Remove(_subject.CurrentFigure);
image.Children.Add(triangle);
_subject.CurrentFigure = triangle;
};
StartAction = (mouseDownPosition) =>
{
if (_subject.CurrentImage == null)
{
return;
}
_startActions[_trianglePoints.Count](mouseDownPosition);
};
_continueActions = new Dictionary <int, EditorAction>(3);
_continueActions[1] = (currentCursorPosition) =>
{
(_subject.CurrentFigure as Polyline).Points.Add(currentCursorPosition);
};
_continueActions[2] = (currentCursorPosition) =>
{
(_subject.CurrentFigure as Polyline).Points[1] = currentCursorPosition;
};
_continueActions[3] = (currentCursorPosition) =>
{
(_subject.CurrentFigure as Polygon).Points[2] = currentCursorPosition;
};
ContinueAction = (currentCursorPosition) =>
{
if (_subject.CurrentImage == null)
{
return;
}
_continueActions[_trianglePoints.Count](currentCursorPosition);
};
FinishAction = (mouseUpPosition) =>
{
if (_subject.CurrentImage == null)
{
return;
}
if (_trianglePoints.Count == 3)
{
if (PositionOfPointYToLineBySegment(_trianglePoints[0], _trianglePoints[1], _trianglePoints[2]) == 0)
{
(_subject.CurrentImage.Child as Canvas).Children.Remove(_subject.CurrentFigure);
_subject.CurrentFigure = null;
}
Reset();
}
};
}
public ImageDrawingState(IChangeDrawingState subject) : base(subject)
{
_firstPoint = new Point();
StartAction = (Point mouseDownPosition) =>
{
_firstPoint = mouseDownPosition;
_image = new Border()
{
Height = 0,
Width = 0,
Background = Brushes.Transparent
};
Canvas.SetLeft(_image, mouseDownPosition.X);
Canvas.SetTop(_image, mouseDownPosition.Y);
_subject.Canvas.Children.Add(_image);
_subject.CurrentImage = _image;
};
ContinueAction = (Point currentCursorPosition) =>
{
double width = currentCursorPosition.X - _firstPoint.X;
double height = currentCursorPosition.Y - _firstPoint.Y;
if (width >= 0)
{
_image.Width = width;
}
else
{
_image.Width = Math.Abs(width);
Canvas.SetLeft(_image, _firstPoint.X + width);
}
if (height >= 0)
{
_image.Height = height;
}
else
{
_image.Height = Math.Abs(height);
Canvas.SetTop(_image, _firstPoint.Y + height);
}
};
FinishAction = (mouseUpPosition) =>
{
if (_image.Width == 0 || _image.Height == 0 ||
_image.BorderThickness.Left + _image.BorderThickness.Right >= _image.Width ||
_image.BorderThickness.Top + _image.BorderThickness.Bottom >= _image.Height)
{
_subject.Canvas.Children.Remove(_image);
_subject.CurrentImage = null;
}
else
{
_image.Child = new Canvas()
{
Width = _image.Width - _image.BorderThickness.Left - _image.BorderThickness.Right,
Height = _image.Height - _image.BorderThickness.Top - _image.BorderThickness.Bottom,
Background = _subject.Canvas.Background,
ClipToBounds = true,
IsHitTestVisible = true
};
_subject.FireCurrentElementsEvents(CurrentElement.Image);
}
Reset();
};
}
