public void MoveElement(GraphicElement el, Point delta)
{
if (el.OnScreen())
{
Trace.WriteLine("*** MoveElement " + el.GetType().Name);
int dx = delta.X.Abs();
int dy = delta.Y.Abs();
var els = EraseIntersectionsTopToBottom(el, dx, dy);
// X1
//el.MoveUndoRedo(delta, false);
el.Move(delta);
el.UpdatePath();
UpdateConnections(el);
DrawBottomToTop(els, dx, dy);
UpdateScreen(els, dx, dy);
}
else
{
el.CancelBackground();
// X1
//el.MoveUndoRedo(delta, false);
el.Move(delta);
// TODO: Display element if moved back on screen at this point?
}
}
public void Redraw(GraphicElement el, int dx = 0, int dy = 0)
{
Trace.WriteLine("*** Redraw1 " + el.GetType().Name);
var els = EraseIntersectionsTopToBottom(el, dx, dy);
DrawBottomToTop(els, dx, dy);
UpdateScreen(els, dx, dy);
}
public void Redraw(GraphicElement el, Action <GraphicElement> afterErase)
{
Trace.WriteLine("*** Redraw2 " + el.GetType().Name);
var els = EraseIntersectionsTopToBottom(el);
UpdateScreen(els);
afterErase(el);
el.UpdatePath();
DrawBottomToTop(els);
UpdateScreen(els);
}
/// <summary>
/// Direct update of display rectangle, used in DynamicConnector.
/// </summary>
public void UpdateDisplayRectangle(GraphicElement el, Rectangle newRect, Point delta)
{
Trace.WriteLine("*** UpdateDisplayRectangle " + el.GetType().Name);
int dx = delta.X.Abs();
int dy = delta.Y.Abs();
var els = EraseIntersectionsTopToBottom(el, dx, dy);
el.DisplayRectangle = newRect;
el.UpdatePath();
DrawBottomToTop(els, dx, dy);
UpdateScreen(els, dx, dy);
}
// We're using reflect here so that the call:
// ex: this.ChangePropertyWithUndoRedo<string>(el, "Text", "Text"));
// can be as general purpose as possible, otherwise we have to write separate undo/redo handlers for each property, which is just gross.
public static void ChangePropertyWithUndoRedo <T>(this ElementProperties props, GraphicElement el, string elementPropertyName, string propertyName)
{
T save = default(T);
T redosave = default(T);
PropertyInfo piElement = el.GetType().GetProperty(elementPropertyName);
PropertyInfo piThis = props.GetType().GetProperty(propertyName);
el.Canvas.Controller.UndoStack.Do((@do, redo) =>
{
if (redo)
{
piElement.SetValue(el, redosave);
piThis.SetValue(props, redosave);
el.Canvas.Controller.ElementSelected.Fire(props, new ElementEventArgs()
{
Element = el
});
el.UpdateProperties();
el.UpdatePath();
el.Canvas.Controller.Redraw(el);
}
else if (@do)
{
save = CastObject <T>(piElement.GetValue(el));
T newVal = CastObject <T>(piThis.GetValue(props));
piElement.SetValue(el, newVal);
redosave = newVal;
}
else
{
piElement.SetValue(el, save);
piThis.SetValue(props, save);
el.Canvas.Controller.ElementSelected.Fire(props, new ElementEventArgs()
{
Element = el
});
el.UpdateProperties();
el.UpdatePath();
el.Canvas.Controller.Redraw(el);
}
});
}
public void MoveElementTo(GraphicElement el, Point location)
{
Point delta = new Point(location.X - el.DisplayRectangle.Left, location.Y - el.DisplayRectangle.Top);
if (el.OnScreen())
{
Trace.WriteLine("*** MoveElement " + el.GetType().Name);
int dx = delta.X.Abs();
int dy = delta.Y.Abs();
var els = EraseOurselvesAndIntersectionsTopToBottom(el, dx, dy);
el.Move(delta);
el.UpdatePath();
UpdateConnections(el);
DrawBottomToTop(els, dx, dy);
UpdateScreen(els, dx, dy);
}
else
{
el.CancelBackground();
el.Move(delta);
// TODO: Display element if moved back on screen at this point?
}
}