public void MoveDown()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Y + shape.Height + 1 <= _canvas.Height)
{
shape.Y++;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void MoveRight()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.X + shape.Width + 1 <= _canvas.Width)
{
shape.X++;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void MoveUp()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Y >= 1)
{
shape.Y--;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void ShrinkRight()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Width > 1)
{
shape.Width--;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void ExpandBottom()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Height + shape.Y + 1 <= _canvas.Height)
{
shape.Height = shape.Height + 1;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void ShrinkBottom()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Height > 1)
{
shape.Height = shape.Height - 1;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void ExpandLeft()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.X >= 1)
{
shape.X--;
shape.Width++;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void ExpandTop()
{
if (_rectangle == null)
{
return;
}
var shape = GetShape();
if (shape.Y >= 1)
{
shape.Y = shape.Y - 1;
shape.Height = shape.Height + 1;
SetShape(shape);
OnShapeChanged?.Invoke(shape);
}
}
public void OnMouseUp(object sender, MouseButtonEventArgs e)
{
Point position = e.GetPosition(_canvas);
if (!IsInValidRegion(position))
{
return;
}
if (!_inMovingState)
{
return;
}
position.X = Math.Round(position.X);
position.Y = Math.Round(position.Y);
OnMouseMove(position);
LeaveModificationMode();
e.Handled = true;
OnShapeChanged?.Invoke(GetShape());
}
void PassShapeChangedNotice(object sender, System.EventArgs e)
{
OnShapeChanged?.Invoke(this, null);
}
private void RectangleOnOnShapeChanged(Rect shape)
{
OnShapeChanged?.Invoke(shape);
}
/// <summary>
/// Important: Only call this when self is Valid!
/// 1. Update internal buffered values
/// 2. Notify holding objects to repaint
/// </summary>
protected virtual void NotifyShapeChanged()
{
_length = null;
OnShapeChanged?.Invoke(this, null);
}
