/// <summary>
/// Find ISelectable under cursor over element's datacontext, if it's ISelectable.IsSelected,
/// assign canDragKey to true, otherwise false.
/// </summary>
/// <param name="canDragKey"></param>
/// <returns></returns>
public static IScriptCommand IfItemUnderMouseIsSelected(IScriptCommand trueCommand = null, IScriptCommand otherwiseCommand = null)
{
return
//Calculate a number of positions.
(HubScriptCommands.ObtainPointerPosition(
//Assign the datacontext item of the UIelement that's undermouse to {ItemUnderMouse}
HubScriptCommands.AssignItemUnderMouse("{ItemUnderMouse}", false,
//And If it's exists and selected,
ScriptCommands.IfAssigned("{ItemUnderMouse}",
ScriptCommands.IfNotAssigned("{ItemUnderMouse.IsSelected}", trueCommand,
ScriptCommands.IfTrue("{ItemUnderMouse.IsSelected}", trueCommand,
otherwiseCommand)), otherwiseCommand))));
}
protected override IScriptCommand executeInner(ParameterDic pm, Control sender,
RoutedEventArgs evnt, IUIInput input, IList <IUIInputProcessor> inpProcs)
{
if (!pm.HasValue <ParameterDic>("{DragDrop}"))
{
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false).Execute(pm);
}
if (!pm.HasValue <Point>(CurrentPositionAdjustedKey))
{
HubScriptCommands.ObtainPointerPosition().Execute(pm);
}
logger.Debug(State.ToString());
switch (State)
{
case DragDropLiteState.StartLite:
case DragDropLiteState.StartCanvas:
string mode = State == DragDropLiteState.StartLite ? "Lite" : "Canvas";
if (dragStart(pm, input, mode))
{
foreach (var item in
pm.GetValue <IEnumerable <IDraggable> >(DragDropDraggingItemsKey)
.Where(i => (State == DragDropLiteState.StartLite) || i is IPositionAware))
{
item.IsDragging = true;
}
return(NextCommand);
}
else
{
return(FailCommand);
}
case DragDropLiteState.EndLite:
case DragDropLiteState.EndCanvas:
case DragDropLiteState.CancelCanvas:
//foreach (var item in pm.GetValue<IEnumerable<IDraggable>>(DragDropDraggingItemsKey))
// item.IsDragging = true;
if (pm.HasValue <Point>(DragDropStartPositionKey))
{
Point currentPosition = pm.GetValue <Point>(CurrentPositionAdjustedKey);
Point startPosition = pm.GetValue <Point>(DragDropStartPositionKey);
Vector movePt = currentPosition - startPosition;
var items = pm.GetValue <IEnumerable <IDraggable> >(DragDropDraggingItemsKey);
foreach (var item in items)
{
item.IsDragging = false;
}
if (State == DragDropLiteState.EndCanvas)
{
foreach (var posAwareItem in items.Cast <IPositionAware>())
{
posAwareItem.OffsetPosition(movePt);
}
}
}
dragEnd(pm);
return(NextCommand);
default: return(ResultCommand.Error(new NotSupportedException(State.ToString())));
}
}