protected override FileExplorer.Script.IScriptCommand onEvent(RoutedEvent eventId)
{
switch (eventId.Name)
{
case "KeyDown":
return
(ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If current drag drop mode is Canvas,
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Canvas",
//And Escape is pressed.
HubScriptCommands.IfKeyGesture("Esc",
//Cancel Canvas drop (by clear {DragDrop} parameters)
DragDropScriptCommands.CancelCanvasDrag(
//Set {EventArgs.Handled} to true.
HubScriptCommands.SetRoutedEventHandled(
//and Detach adorner.
HubScriptCommands.DettachSelectedItemsAdorner("SelectedItemsAdorner}")))))));
case "PreviewTouchDown":
case "PreviewMouseDown":
return
//Find a DataContext that implement SupportDrag.
(HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}",
DataContextType.SupportDrag, "{ISupportDrag}", null, false,
//And If there's one.
ScriptCommands.IfAssigned("{ISupportDrag}",
//Calculate a number of positions.
HubScriptCommands.ObtainPointerPosition(
//Assign the datacontext item to {ItemUnderMouse}
HubScriptCommands.AssignItemUnderMouse("{ItemUnderMouse}", false,
//And set Sender's StartDraggingItem to {ItemUnderMouse}
ScriptCommands.IfAssigned("{ItemUnderMouse}",
ScriptCommands.IfTrue("{ItemUnderMouse.IsSelected}",
HubScriptCommands.SetDependencyProperty("{Sender}",
UIEventHubProperties.StartDraggingItemProperty, "{ItemUnderMouse}"))))))));
case "TouchDrag":
case "MouseDrag":
return
//If event not marked handled.
(HubScriptCommands.IfNotRoutedEventHandled(
HubScriptCommands.IfDependencyPropertyEqualDefaultValue <object>("{Sender}",
UIEventHubProperties.StartDraggingItemProperty,
//If StartDraggingProperty = null, return.
ResultCommand.NoError,
//If StartDraggingProperty != null, Check and set IsDraggingProperty to true.
HubScriptCommands.SetDependencyPropertyIfDifferentValue("{Sender}",
UIEventHubProperties.IsDraggingProperty, true,
//If changed IsDraggingProperty, Find DataContext that support ISupportDrag to {ISupportDrag} variable.
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportDrag, "{ISupportDrag}", null, false,
//If ISupportDrag is assigned to a non-null value,
//Initialize DragLiteParameters (in {DragDrop} global parameterDic).
DragDropScriptCommands.StartCanvasDrag("{ISupportDrag}",
//then set {EventArgs.Handled} to true.
HubScriptCommands.SetRoutedEventHandled(
//And attach/update adorner.
HubScriptCommands.AttachSelectedItemsAdorner("{SelectedItemsAdorner}",
HubScriptCommands.UpdateSelectedItemsAdorner("{SelectedItemsAdorner}")))))
, null))));
case "MouseMove":
case "TouchMove":
return
//Only 1 of 5 TouchEvent will be processed
(HubScriptCommands.ThrottleTouchDrag(5,
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Canvas",
HubScriptCommands.ObtainPointerPosition(
//Update adorner CentrePosition.
HubScriptCommands.UpdateSelectedItemsAdorner("{SelectedItemsAdorner}"))))));
case "PreviewTouchUp":
case "PreviewMouseUp":
return
(HubScriptCommands.SetDependencyPropertyIfDifferentValue("{Sender}", UIEventHubProperties.IsDraggingProperty, false,
HubScriptCommands.SetDependencyPropertyValue <object>("{Sender}", UIEventHubProperties.StartDraggingItemProperty, null,
//Update position of each IPostionAware and clear {DragDrop} parameters)
DragDropScriptCommands.EndCanvasDrag(
//Set {EventArgs.Handled} to true.
HubScriptCommands.SetRoutedEventHandled(
//Detach adorner.
HubScriptCommands.DettachSelectedItemsAdorner("SelectedItemsAdorner}"))))));
}
return(base.onEvent(eventId));
}
protected override IScriptCommand onEvent(RoutedEvent eventId)
{
if (eventId.Name.Contains("Mouse") && !EnableMouse)
{
return(base.onEvent(eventId));
}
if (eventId.Name.Contains("Touch") && !EnableTouch)
{
return(base.onEvent(eventId));
}
IScriptCommand detachAdornerAndResetDragDrop =
ScriptCommands.SetPropertyValue(DragDropLiteCommand.DragDropDropTargetKey, "IsDraggingOver", false,
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}",
DragDropScriptCommands.EndLiteDrag("{DragDrop.SupportDrag}")));
if (EnableDrag)
{
switch (eventId.Name)
{
case "KeyDown":
return(ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
HubScriptCommands.IfKeyGesture(new KeyGesture(Key.Escape),
detachAdornerAndResetDragDrop)));
case "PreviewMouseDown":
case "PreviewTouchDown":
return(_cmdDic.PreviewMouseDown ?? (_cmdDic.PreviewMouseDown =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//Set Default value for CanDrag first.
ScriptCommands.Assign("{DragDrop.CanDrag}", false, false,
//Find a DataContext that implement SupportDrag, and if assigned
HubScriptCommands.IfHasDataContext("{EventArgs.OriginalSource}", DataContextType.SupportDrag,
//and item under mouse (ISelectable) IsSelected.
DragDropScriptCommands.IfItemUnderMouseIsSelected(
//Notify MouseDrag can drag.
ScriptCommands.Assign("{DragDrop.CanDrag}", true, false,
//Prevent MultiSelect from starting.
HubScriptCommands.SetRoutedEventHandled())
))))));
case "TouchDrag":
case "MouseDrag":
return(_cmdDic.MouseDrag ?? (_cmdDic.MouseDrag =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If not handled.
HubScriptCommands.IfNotRoutedEventHandled(
//IfCanDrag (assigned from PreviewMouseDown)
ScriptCommands.IfTrue("{DragDrop.CanDrag}",
//Reset CanDrag
ScriptCommands.Assign("{DragDrop.CanDrag}", false, false,
//Mark handled, prevent MultiSelect from processing.
HubScriptCommands.SetRoutedEventHandled(
//If changed IsDraggingProperty, Find DataContext that support ISupportDrag to {ISupportDrag} variable.
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportDrag, "{DragDrop.SupportDrag}", null, false,
//Determine DragMethod and call QueryDrag().
DragDropScriptCommands.StartLiteDrag("{DragDrop.SupportDrag}")
))))))));
}
}
if (EnableDrop)
{
switch (eventId.Name)
{
case "QueryCursor": return(_cmdDic.GiveFeedback ?? (_cmdDic.GiveFeedback =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If QueryDropResult returns none, set cursor to not droppable.
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
HubScriptCommands.QueryDropEffects("{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}", DragDropLiteCommand.DragDropEffectsKey, "{DragDrop.QueryDropResult}", false,
ScriptCommands.IfEquals("{DragDrop.QueryDropResult}", QueryDropEffects.None,
HubScriptCommands.SetCustomCursor(Cursors.No),
HubScriptCommands.SetCustomCursor(Cursors.Arrow)))))));
case "TouchMove":
case "MouseMove":
return(_cmdDic.MouseMove ?? (_cmdDic.MouseMove =
HubScriptCommands.ThrottleTouchDrag(5,
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If not handled.
HubScriptCommands.IfNotRoutedEventHandled(
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportDrop, "{ISupportDrop}", "{ElementSupportDrop}", false,
//And if there's one,
//If Moved to different support drop.
ScriptCommands.IfEquals("{ISupportDrop}", DragDropLiteCommand.DragDropDropTargetKey,
DragDropScriptCommands.UpdateAdornerPointerPosition("{DragDrop.Adorner}"),
HubScriptCommands.QueryDropEffects("{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}", DragDropLiteCommand.DragDropEffectsKey, "{DragDrop.QueryDropResult}", false,
ScriptCommands.SetPropertyValue(DragDropLiteCommand.DragDropDropTargetKey, (ISupportDrop p) => p.IsDraggingOver, false,
ScriptCommands.Assign(new Dictionary <string, object>()
{
{ DragDropLiteCommand.DragDropDropTargetKey, "{ISupportDrop}" }, //Store SupportDrop property to global for future use.
{ "{DragDrop.ElementSupportDrop}", "{ElementSupportDrop}" }, //Store SupportDrop element to global for future use.
{ "{EventArgs.Handled}", true } //Mark RoutedEvent handled.
}, false,
//ScriptCommands.IfNotEquals("{DragDrop.QueryDropResult}", QueryDropEffects.None,
//Attach DragAdorner and update it.
ScriptCommands.SetPropertyValue(DragDropLiteCommand.DragDropDropTargetKey, (ISupportDrop p) => p.IsDraggingOver, true,
DragDropScriptCommands.AttachAdorner(
"{DragDrop.AdornerLayer}", "{DragDrop.Adorner}",
"{ISupportDrop}", "{DragDrop.DragMethod}", "{DragDrop.Draggables}"))
/*DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}")*/)))))))))));
case "TouchUp":
case "PreviewMouseUp":
return(_cmdDic.MouseUp ?? (_cmdDic.MouseUp =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
//Find DataContext that support ISupportDrop
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportDrop, "{ISupportDrop}", "{ElementSupportDrop}", false,
//If ISupportDrop found.
ScriptCommands.IfAssigned("{ISupportDrop}",
////Obtain DataObject from event and Call ISupportDrop.QueryDrop() to get IDraggables[] and QueryDropResult.
HubScriptCommands.QueryDropEffects("{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}", DragDropLiteCommand.DragDropEffectsKey, "{DragDrop.QueryDropResult}", false,
//If QueryShellDragInfo Success, if DragMethod...
ScriptCommands.IfEquals(QueryDrag.DragMethodKey, DragMethod.Menu,
HubScriptCommands.SetRoutedEventHandled(
HubScriptCommands.ShowDragAdornerContextMenu("{DragDrop.Adorner}",
"{DragDrop.QueryDropResult.SupportedEffects}",
"{DragDrop.QueryDropResult.PreferredEffect}",
"{ResultEffect}",
//After menu closed...
ScriptCommands.IfEquals("{ResultEffect}", DragDropEffectsEx.None,
//If User choose None (click on empty area), detach and reset.
detachAdornerAndResetDragDrop,
//Otherwise, call ISupportDrop.Drop()
HubScriptCommands.QueryDrop("{DragDrop.SupportDrag}", "{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}",
"{ResultEffect}", "{DragDrop.DropResult}", false,
//And detach adorner.
detachAdornerAndResetDragDrop)))),
//If DragMethod is not Menu, Drop immediately.
HubScriptCommands.QueryDrop("{DragDrop.SupportDrag}", "{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}",
"{DragDrop.QueryDropResult.PreferredEffect}", "{DragDrop.DropResult}", false,
detachAdornerAndResetDragDrop))),
//If QueryDropEffects is None, drag failed, detach adorner.
detachAdornerAndResetDragDrop))))));
}
}
switch (eventId.Name)
{
case "PreviewKeyDown":
return
(ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
HubScriptCommands.IfKeyGesture(new KeyGesture(Key.Escape),
detachAdornerAndResetDragDrop))));
case "PreviewMouseUp":
return
(ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
ScriptCommands.IfEquals(DragDropLiteCommand.DragDropModeKey, "Lite",
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}"))));
}
return(base.onEvent(eventId));
}
protected override FileExplorer.Script.IScriptCommand onEvent(RoutedEvent eventId)
{
if (EnableDrag)
{
switch (eventId.Name)
{
case "PreviewMouseDown":
return(_cmdDic.PreviewMouseDown ?? (_cmdDic.PreviewMouseDown =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//Set Default value for CanDrag first.
ScriptCommands.Assign("{DragDrop.CanDrag}", false, false,
//Find a DataContext that implement SupportDrag, and if assigned
HubScriptCommands.IfHasDataContext("{EventArgs.OriginalSource}", DataContextType.SupportShellDrag,
//and item under mouse (ISelectable) IsSelected.
DragDropScriptCommands.IfItemUnderMouseIsSelected(
//Notify MouseDrag can drag.
ScriptCommands.Assign("{DragDrop.CanDrag}", true, false,
//Prevent MultiSelect from starting.
HubScriptCommands.SetRoutedEventHandled())
))))));
case "MouseDrag":
return(_cmdDic.MouseDrag ?? (_cmdDic.MouseDrag =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If not handled.
HubScriptCommands.IfNotRoutedEventHandled(
//IfCanDrag (assigned from PreviewMouseDown)
ScriptCommands.IfTrue("{DragDrop.CanDrag}",
//Reset CanDrag
ScriptCommands.Assign("{DragDrop.CanDrag}", false, false,
//Mark handled, prevent MultiSelect from processing.
HubScriptCommands.SetRoutedEventHandled(
//If changed IsDraggingProperty, Find DataContext that support ISupportDrag to {ISupportDrag} variable.
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportShellDrag, "{DragDrop.SupportDrag}", null, false,
//Determine DragMethod and call QueryDrag().
DragDropScriptCommands.StartShellDrag("{DragDrop.SupportDrag}")
))))))));
case "PreviewMouseUp":
return(_cmdDic.PreviewMouseUp ?? (_cmdDic.PreviewMouseUp =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//HubScriptCommands.SetDependencyPropertyValue("{Sender}", AttachedProperties.IsDraggingProperty, false,
ScriptCommands.IfEquals(QueryDrag.DragMethodKey, DragMethod.Menu,
ResultCommand.NoError,
//This is defined in drop, detach if there's an adorner.
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}")))));
case "MouseMove":
return(_cmdDic.MouseMove ?? (_cmdDic.MouseMove =
HubScriptCommands.IfDependencyProperty("{Sender}", UIEventHubProperties.IsDraggingProperty,
ComparsionOperator.Equals, true,
HubScriptCommands.SetRoutedEventHandled())));
}
}
if (EnableDrop)
{
switch (eventId.Name)
{
case "DragEnter": return(_cmdDic.DragEnter ?? (_cmdDic.DragEnter =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//Find DataContext that support IShellDrop
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportShellDrop, "{ISupportDrop}", "{ElementSupportDrop}", false,
//And if there's one,
ScriptCommands.IfAssigned("{ISupportDrop}",
HubScriptCommands.QueryShellDragInfo("{ISupportDrop}", "{DataObj}", "{DragDrop.Draggables}", "{DragDrop.QueryDropResult}", false,
//Otherwise,
ScriptCommands.Assign(new Dictionary <string, object>()
{
{ "{DragDrop.SupportDrop}", "{ISupportDrop}" }, //Store SupportDrop property to global for future use.
{ "{DragDrop.ElementSupportDrop}", "{ElementSupportDrop}" }, //Store SupportDrop element to global for future use.
{ "{ISupportDrop.IsDraggingOver}", true }, //Set DataContext.IsDraggingOver to true.
{ "{EventArgs.Handled}", true } //Mark RoutedEvent handled.
}, false,
//Attach DragAdorner and update it.
DragDropScriptCommands.AttachAdorner(
"{DragDrop.AdornerLayer}", "{DragDrop.Adorner}",
"{ISupportDrop}", "{DragDrop.DragMethod}", "{DragDrop.Draggables}"))),
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}"))))));
case "GiveFeedback": return(_cmdDic.GiveFeedback ?? (_cmdDic.GiveFeedback =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//If QueryDropResult returns none, set cursor to not droppable.
ScriptCommands.IfEquals("{DragDrop.QueryDropResult}", QueryDropEffects.None,
HubScriptCommands.SetCustomCursor(Cursors.No)))));
case "DragOver": return(_cmdDic.DragOver ?? (_cmdDic.DragOver =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
DragDropScriptCommands.UpdateAdornerPointerPosition("{DragDrop.Adorner}"))));
case "DragLeave": return(_cmdDic.DragLeave ?? (_cmdDic.DragLeave =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
ScriptCommands.SetPropertyValue("{DragDrop.SupportDrop}", "IsDraggingOver", false,
//Detach adorner if DragLeave current element.
ScriptCommands.IfAssigned("{DragDrop.SupportDrop}",
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}"))))));
case "Drop":
IScriptCommand detachAdornerAndResetDragDrop =
ScriptCommands.SetPropertyValue("{DragDrop.SupportDrop}", "IsDraggingOver", false,
DragDropScriptCommands.DetachAdorner("{DragDrop.AdornerLayer}", "{DragDrop.Adorner}",
ScriptCommands.Reset(null, "{DragDrop.Adorner}", "{DragDrop.AdornerLayer}",
"{DragDrop.SupportDrop}", "{DragDrop.Draggables}")));
return(_cmdDic.Drop ?? (_cmdDic.Drop =
ScriptCommands.AssignGlobalParameterDic("{DragDrop}", false,
//Find DataContext that support ISupportShellDrop
HubScriptCommands.AssignDataContext("{EventArgs.OriginalSource}", DataContextType.SupportShellDrop, "{ISupportDrop}", "{ElementSupportDrop}", false,
//If ISupportDrop found.
ScriptCommands.IfAssigned("{ISupportDrop}",
////Obtain DataObject from event and Call ISupportDrop.QueryDrop() to get IDraggables[] and QueryDropResult.
HubScriptCommands.SetRoutedEventHandled(
HubScriptCommands.QueryShellDragInfo("{ISupportDrop}", "{DataObj}", "{DragDrop.Draggables}", "{DragDrop.QueryDropResult}", false,
//If QueryShellDragInfo Success, if DragMethod...
ScriptCommands.IfEquals(QueryDrag.DragMethodKey, DragMethod.Menu,
//Backup because ISupportDrag parameter is reset after this command is completed.
ScriptCommands.Assign("{DragDrop.SupportDragBackup}", "{DragDrop.SupportDrag}", false,
//is Menu, then Show Menu.
HubScriptCommands.ShowDragAdornerContextMenu("{DragDrop.Adorner}",
"{DragDrop.QueryDropResult.SupportedEffects}",
"{DragDrop.QueryDropResult.PreferredEffect}",
"{ResultEffect}",
//After menu closed...
ScriptCommands.IfEquals("{ResultEffect}", DragDropEffectsEx.None,
//If User choose None (click on empty area), detach and reset.
detachAdornerAndResetDragDrop,
//Otherwise, call ISupportDrop.Drop()
HubScriptCommands.QueryDrop("{DragDrop.SupportDragBackup}", "{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}",
"{ResultEffect}", "{DragDrop.DropResult}", false,
//And detach adorner.
detachAdornerAndResetDragDrop)))),
//If DragMethod is not Menu, Drop immediately.
HubScriptCommands.QueryDrop("{DragDrop.SupportDrag}", "{ISupportDrop}", "{DragDrop.Draggables}", "{DataObj}",
"{DragDrop.QueryDropResult.PreferredEffect}", "{DragDrop.DropResult}", false,
detachAdornerAndResetDragDrop)),
//If QueryDropEffects is None, drag failed, detach adorner.
detachAdornerAndResetDragDrop)))))));
}
}
return(base.onEvent(eventId));
}
