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;
}
}
public void StartRotating(SelectionArea area)
{
_currentEditMode = EditMode.ROTATING;
_activeRotateArea = area;
_activeRotateAreaRotationBeforeStart = area.Rotation;
_activeRotateAreaCenterPointBeforeStart = area.CalculateCenterPoint();
}
private void drawCanvas_MouseDown(object sender, MouseButtonEventArgs e)
{
_isMouseDown = true;
_mouseDownPoint = e.GetPosition(drawCanvas);
if (_currentEditMode == EditMode.INSERTING)
{
SelectionArea area = new SelectionArea(drawCanvas, _mouseDownPoint.X, _mouseDownPoint.Y);
area.AddToCanvas(drawCanvas);
_areas.Add(area);
_activeInsertArea = area;
AttachMouseEvents(area);
}
}
private void AttachMouseEvents(SelectionArea area)
{
area.ResizeLeftRect.MouseDown += (object sender, MouseButtonEventArgs e) => {
StartResizing(area, SelectionArea.ResizeSide.LEFT);
};
area.ResizeTopRect.MouseDown += (object sender, MouseButtonEventArgs e) => {
StartResizing(area, SelectionArea.ResizeSide.TOP);
};
area.ResizeRightRect.MouseDown += (object sender, MouseButtonEventArgs e) => {
StartResizing(area, SelectionArea.ResizeSide.RIGHT);
};
area.ResizeBottomRect.MouseDown += (object sender, MouseButtonEventArgs e) => {
StartResizing(area, SelectionArea.ResizeSide.BOTTOM);
};
area.RotatorEllipse.MouseDown += (object sender, MouseButtonEventArgs e) => {
StartRotating(area);
};
}
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;
}
}