protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e) {
_startOffset = e.GetPosition(this);
_mouseAction = SetHitType(_startOffset);
if((_mouseAction & BorderHitType.Border) != BorderHitType.None) {
_borderDragInProgress = true;
e.Handled = true;
CaptureMouse();
} else {
base.OnMouseLeftButtonDown(e);
}
}
protected override void OnMouseMove(MouseEventArgs e) {
if(_borderDragInProgress) {
var p = e.GetPosition(this);
double offset_x = p.X - _startOffset.X;
double offset_y = p.Y - _startOffset.Y;
double left = 0;
double top = 0;
double right = Width;
double bottom = Height;
if((_mouseAction & BorderHitType.L) == BorderHitType.L) {
left = CELL_SIZE * 2 * Math.Round((left + offset_x) / (CELL_SIZE * 2));
} else if((_mouseAction & BorderHitType.R) == BorderHitType.R) {
right = CELL_SIZE * 2 * Math.Round((right + offset_x-10) / (CELL_SIZE * 2))+10;
}
if((_mouseAction & BorderHitType.T) == BorderHitType.T) {
top = CELL_SIZE * 2 * Math.Round((top + offset_y) / (CELL_SIZE * 2));
} else if((_mouseAction & BorderHitType.B) == BorderHitType.B) {
bottom = CELL_SIZE * 2 * Math.Round((bottom + offset_y-10) / (CELL_SIZE * 2))+10;
}
if((right > left + 10 + 2 * CELL_SIZE) && (bottom > top + 10 + 2 * CELL_SIZE)) {
RenderBackground(left, top, right, bottom);
}
} else {
_mouseAction = SetHitType(e.GetPosition(this));
base.OnMouseMove(e);
}
}
