public MoverManipulationEventArgs(UIElement sourceElement, RectManipulations manipulation)
{
sourceElement.AssertNotNull(nameof(sourceElement));
SourceElement = sourceElement;
Manipulation = manipulation;
}
public static Cursor GetCursor(RectManipulations manipulations)
{
if (manipulations == RectManipulations.Move)
{
return(Cursors.SizeAll);
}
if (manipulations == RectManipulations.ResizeL || manipulations == RectManipulations.ResizeR)
{
return(Cursors.SizeWE);
}
if (manipulations == RectManipulations.ResizeT || manipulations == RectManipulations.ResizeB)
{
return(Cursors.SizeNS);
}
if (manipulations == (RectManipulations.ResizeL | RectManipulations.ResizeT) || manipulations == (RectManipulations.ResizeR | RectManipulations.ResizeB))
{
return(Cursors.SizeNWSE);
}
if (manipulations == (RectManipulations.ResizeL | RectManipulations.ResizeB) || manipulations == (RectManipulations.ResizeR | RectManipulations.ResizeT))
{
return(Cursors.SizeNESW);
}
return(Cursors.Arrow);
}
protected virtual bool HandlePerformManipulation(UIElement sourceElement, RectManipulations manipulations, Vector sizeVector, Vector positionVector)
{
var args = new MoverPerformManipulationEventArgs(sourceElement, manipulations, sizeVector, positionVector);
PerformManipulation?.Invoke(this, args);
return(!args.Cancel);
}
protected virtual bool HandleBeginManipulation(UIElement sourceElement, RectManipulations manipulations)
{
var args = new MoverManipulationEventArgs(sourceElement, manipulations);
BeginManipulation?.Invoke(this, args);
return(!args.Cancel);
}
public static void GetManipulationsVectors(RectManipulations manipulations, Point mousePos, Point prevMousePos, out Vector positionVector, out Vector sizeVector)
{
var deltaX = mousePos.X - prevMousePos.X;
var deltaY = mousePos.Y - prevMousePos.Y;
positionVector = new Vector(0, 0);
sizeVector = new Vector(0, 0);
if (manipulations.HasFlag(RectManipulations.Move))
{
positionVector.X = deltaX;
positionVector.Y = deltaY;
}
if (manipulations.HasFlag(RectManipulations.ResizeR))
{
sizeVector.X += deltaX;
}
if (manipulations.HasFlag(RectManipulations.ResizeB))
{
sizeVector.Y += deltaY;
}
if (manipulations.HasFlag(RectManipulations.ResizeL))
{
positionVector.X += deltaX;
sizeVector.X += -deltaX;
}
if (manipulations.HasFlag(RectManipulations.ResizeT))
{
positionVector.Y += deltaY;
sizeVector.Y += -deltaY;
}
}
public MoverManipulationInfo(UIElement sourceElement, RectManipulations manipulations, Point prevMousePos)
{
SourceElement = sourceElement;
Manipulations = manipulations;
PrevMousePos = prevMousePos;
}
protected virtual void HandleReleaseManipulation(UIElement sourceElement, RectManipulations manipulations)
{
var args = new MoverManipulationEventArgs(sourceElement, manipulations);
ReleaseManipulation?.Invoke(this, args);
}
public MoverPerformManipulationEventArgs(UIElement sourceElement, RectManipulations manipulation, Vector sizeVector, Vector positionVector)
: base(sourceElement, manipulation)
{
SizeVector = sizeVector;
PositionVector = positionVector;
}
