public static IMouseDataSource BindLocalDragger(
this IMouseDataSource source, ILocalDragger <Point> dragger)
{
source.MouseMoved += dragger.NewPoint;
dragger.NewPoint(MouseMessageType.Down, source.InitialPoint);
return(source);
}
public InitialDeltaSource(IMouseDataSource source, double xTol, double yTol)
{
this.xTol = xTol;
this.yTol = yTol;
this.source = source;
source.MouseMoved += OnMouseMoved;
}
public static IMouseDataSource DragTarget(this IMouseDataSource src, double opacity = 1)
{
IDragUIWindow?window = null;
Point HandleMouseMove(LocalDragEventArgs ea)
{
if (window == null)
{
if (ea.MessageType != MouseMessageType.Down)
{
return(ea.TransformedPoint);
}
window = src.Root.ConstructDragWindow(ea.Target, opacity);
window.Show();
}
window.MouseMoved(ea);
if (ea.MessageType == MouseMessageType.Up)
{
window = null;
}
return(ea.TransformedPoint);
}
return(LambdaMouseMonitor.FromFull(src, HandleMouseMove));
}
private LambdaMouseMonitor(IMouseDataSource other, Func <Point, Point> lambda)
{
this.other = other;
other.MouseMoved += (s, e) =>
{
e.TransformedPoint = lambda(e.TransformedPoint);
MouseMoved?.Invoke(s, e);
};
}
public static IMouseDataSource DragTarget(this IMouseDataSource src, double opacity = 1)
{
if (src.Target is not FrameworkElement target)
{
return(src);
}
src.BindLocalDragger(
LocalDragger.MinimumDrag(new DragUiWindow(target, opacity)));
return(src);
}
public static IMouseDataSource Drag(this IMouseDataSource mon, Func <IDataObject> dataToDrag, DragDropEffects allowedEffects,
Action <DragDropEffects>?onDragDone = null)
{
mon.BindLocalDragger(
LocalDragger.MinimumDrag(
LocalDragger.MaxMoves(1, LocalDragger.Action((_, __) =>
{
var ret = new DragHandler(mon).InitiateDrag(dataToDrag(), allowedEffects);
onDragDone?.Invoke(ret);
}))));
return(mon);
}
public static void Drag(this IMouseDataSource mon, Func <IDataObject> dataToDrag, DragDropEffects allowedEffects,
Action <DragDropEffects>?onDragDone = null)
{
var once = false;
mon.MouseMoved += (s, e) =>
{
if (e.MessageType != MouseMessageType.Down)
{
return;
}
if (once)
{
return;
}
once = true;
var ret = mon.Root.InitiateDrag(dataToDrag(), allowedEffects, e);
onDragDone?.Invoke(ret);
};
}
public DragHandler(IMouseDataSource source)
{
this.source = source;
}
public static IMouseDataSource Bind(this IMouseDataSource mon, Action <double, double> boundAction)
{
mon.MouseMoved += (s, e) => boundAction(e.TransformedPoint.X, e.TransformedPoint.Y);
return(mon);
}
Transform(this IMouseDataSource mon, Func <double, double, (double X, double Y)> func) =>
public static IMouseDataSource AsDeltas(this IMouseDataSource mon) => LambdaMouseMonitor.FromFull(mon, CreateDeltaFilter());
public static void Drag(this IMouseDataSource mon, IDataObject dataToDrag, DragDropEffects allowedEffects,
Action <DragDropEffects>?onDragDone = null) => Drag(mon, () => dataToDrag, allowedEffects, onDragDone);
public static LambdaMouseMonitor FromFull(IMouseDataSource other, Func <LocalDragEventArgs, Point> lambda) => new LambdaMouseMonitor(other, lambda);
public static LambdaMouseMonitor FromPoint(IMouseDataSource other, Func <Point, Point> lambda) => new LambdaMouseMonitor(other, lambda);
public static IMouseDataSource BindLocalDragger(
this IMouseDataSource source, Func <IMouseDataSource, ILocalDragger <Point> > dragger) =>
BindLocalDragger(source, dragger(source));
public DragHandler(IMouseDataSource source, LocalDragEventArgs mouseDownArgs)
{
this.source = source;
this.mouseDownArgs = mouseDownArgs;
}