private void StartResizing(SelectionArea area, SelectionArea.ResizeSide side)
{
_currentEditMode = EditMode.RESIZING;
_activeResizeArea = area;
_activeResizeAreaSide = side;
_activeResizeAreaXbeforeStart = area.OffsetX;
_activeResizeAreaYbeforeStart = area.OffsetY;
_activeResizeAreaWidthbeforeStart = area.AreaWidth;
_activeResizeAreaHeightbeforeStart = area.AreaHeight;
switch (side)
{
case SelectionArea.ResizeSide.LEFT:
drawCanvas.Cursor = Cursors.SizeWE;
break;
case SelectionArea.ResizeSide.TOP:
drawCanvas.Cursor = Cursors.SizeNS;
break;
case SelectionArea.ResizeSide.RIGHT:
drawCanvas.Cursor = Cursors.SizeWE;
break;
case SelectionArea.ResizeSide.BOTTOM:
drawCanvas.Cursor = Cursors.SizeNS;
break;
}
}
private void UpdateResizeArea(Point currentMousePoint)
{
Point currentMousePointTransformed = _activeResizeArea.AreaCanvas.PointFromScreen(currentMousePoint);
Point mouseDownPointTransformed = _activeResizeArea.AreaCanvas.PointFromScreen(_mouseDownPoint);
double deltaX = currentMousePointTransformed.X - mouseDownPointTransformed.X;
double deltaY = currentMousePointTransformed.Y - mouseDownPointTransformed.Y;
switch (_activeResizeAreaSide)
{
case SelectionArea.ResizeSide.LEFT:
_activeResizeArea.OffsetX = _activeResizeAreaXbeforeStart + deltaX;
_activeResizeArea.AreaWidth = _activeResizeAreaWidthbeforeStart - deltaX;
break;
case SelectionArea.ResizeSide.TOP:
_activeResizeArea.OffsetY = _activeResizeAreaYbeforeStart + deltaY;
_activeResizeArea.AreaHeight = _activeResizeAreaHeightbeforeStart - deltaY;
break;
case SelectionArea.ResizeSide.RIGHT:
_activeResizeArea.AreaWidth = _activeResizeAreaWidthbeforeStart + deltaX;
break;
case SelectionArea.ResizeSide.BOTTOM:
_activeResizeArea.AreaHeight = _activeResizeAreaHeightbeforeStart + deltaY;
break;
}
if (_activeResizeArea.OffsetX > _activeResizeAreaXbeforeStart + _activeResizeAreaWidthbeforeStart)
{
_activeResizeAreaSide = SelectionArea.ResizeSide.RIGHT;
}
if (_activeResizeArea.OffsetY > _activeResizeAreaYbeforeStart + _activeResizeAreaHeightbeforeStart)
{
_activeResizeAreaSide = SelectionArea.ResizeSide.BOTTOM;
}
if (_activeResizeArea.AreaWidth < 0)
{
_activeResizeAreaSide = SelectionArea.ResizeSide.LEFT;
}
if (_activeResizeArea.AreaHeight < 0)
{
_activeResizeAreaSide = SelectionArea.ResizeSide.TOP;
}
}
private void drawCanvas_MouseUp(object sender, MouseButtonEventArgs e)
{
_isMouseDown = false;
drawCanvas.Cursor = Cursors.Pen;
if (_currentEditMode == EditMode.INSERTING)
{
_activeInsertArea = null;
}
else if (_currentEditMode == EditMode.RESIZING)
{
_activeResizeArea = null;
_activeResizeAreaSide = SelectionArea.ResizeSide.NONE;
_currentEditMode = EditMode.INSERTING;
}
else if (_currentEditMode == EditMode.ROTATING)
{
_activeRotateArea = null;
_currentEditMode = EditMode.INSERTING;
}
}
