internal static IEnumerable <string> GetValidVisualStatesListViewBaseItem(ListViewBaseItemVisualStatesCriteria criteria)
{
int index = 0;
//int expectedVisualStatesSize = 6;
int expectedVisualStatesSize = 2; // See Uno TODO below
var validVisualStates = new string[expectedVisualStatesSize];
// Uno TODO: use this method for all visual states. For now it's only used for dragging states.
// Focus States
if (FocusState.Unfocused != criteria.focusState && criteria.isEnabled)
{
if (FocusState.Pointer == criteria.focusState)
{
validVisualStates[index] = "PointerFocused";
}
else
{
validVisualStates[index] = "Focused";
}
}
else
{
validVisualStates[index] = "Unfocused";
}
++index;
//// Multi-Select States
//if (criteria.isMultiSelect)
//{
// validVisualStates[index] = "MultiSelectEnabled";
//}
//else
//{
// validVisualStates[index] = "MultiSelectDisabled";
//}
//++index;
//// Enabled and Selection States
//if (criteria.isEnabled)
//{
// validVisualStates[index++] = "Enabled";
// if (criteria.isDraggedOver)
// {
// if (criteria.isSelected)
// {
// validVisualStates[index] = "PointerOverSelected";
// }
// else
// {
// validVisualStates[index] = "PointerOver";
// }
// }
// else if (criteria.isSelected)
// {
// if (criteria.isPressed)
// {
// validVisualStates[index] = "PressedSelected";
// }
// else if (criteria.isPointerOver)
// {
// validVisualStates[index] = "PointerOverSelected";
// }
// else
// {
// if (criteria.isDragging && criteria.isItemDragPrimary && !criteria.isDragVisualCaptured)
// {
// // Retain press till drag visual is captured
// validVisualStates[index] = "PressedSelected";
// }
// else
// {
// validVisualStates[index] = "Selected";
// }
// }
// }
// else if (criteria.isPointerOver)
// {
// if (criteria.isPressed)
// {
// validVisualStates[index] = "Pressed";
// }
// else
// {
// validVisualStates[index] = "PointerOver";
// }
// }
// else if (criteria.isPressed)
// {
// validVisualStates[index] = "Pressed";
// }
// else
// {
// if (criteria.isDragging && criteria.isItemDragPrimary && !criteria.isDragVisualCaptured)
// {
// // Retain press till drag visual is captured
// validVisualStates[index] = "Pressed";
// }
// else
// {
// validVisualStates[index] = "Normal";
// }
// }
//}
//else
//{
// validVisualStates[index++] = "Disabled";
// if (criteria.isSelected)
// {
// validVisualStates[index] = "Selected";
// }
// else
// {
// validVisualStates[index] = "Normal";
// }
//}
//++index;
//validVisualStates[index] = "NoReorderHint";
//++index;
// Drag & Reorder States
if ((criteria.isDragging || criteria.isHolding) && criteria.isInsideListView)
{
// to go into the DragOver state, an item must be DraggedOver, enabled, not selected and not the primary dragged item
// selected items should go into MultipleDraggingSecondary
// primary dragged items should go to DraggedPlaceholder state for the duration of the drag
if (criteria.isDraggedOver && criteria.isEnabled && !criteria.isItemDragPrimary && !criteria.isSelected)
{
validVisualStates[index] = "DragOver";
}
else if (criteria.dragItemsCount > 1)
{
if (criteria.isItemDragPrimary)
{
if (criteria.isDragVisualCaptured)
{
if (criteria.canReorder)
{
validVisualStates[index] = "ReorderedPlaceholder";
}
else
{
validVisualStates[index] = "DraggedPlaceholder";
}
}
else
{
if (criteria.canReorder)
{
validVisualStates[index] = "MultipleReorderingPrimary";
}
else
{
validVisualStates[index] = "MultipleDraggingPrimary";
}
}
}
else
{
if (criteria.isSelected)
{
if (criteria.canReorder)
{
validVisualStates[index] = "ReorderingTarget";
}
else
{
validVisualStates[index] = "MultipleDraggingSecondary";
}
}
else
{
if (criteria.canReorder)
{
validVisualStates[index] = "ReorderingTarget";
}
else
{
validVisualStates[index] = "DraggingTarget";
}
}
}
}
else
{
// Single drag
if (criteria.isItemDragPrimary)
{
if (criteria.isDragVisualCaptured)
{
if (criteria.canReorder)
{
validVisualStates[index] = "ReorderedPlaceholder";
}
else
{
validVisualStates[index] = "DraggedPlaceholder";
}
}
else
{
if (criteria.canReorder)
{
validVisualStates[index] = "Reordering";
}
else
{
validVisualStates[index] = "Dragging";
}
}
}
else
{
if (criteria.canReorder)
{
validVisualStates[index] = "ReorderingTarget";
}
else
{
validVisualStates[index] = "DraggingTarget";
}
}
}
}
else
{
// No drag
validVisualStates[index] = "NotDragging";
}
return(validVisualStates);
}
private protected override void ChangeVisualState(bool useTransitions)
{
// !!!!!! WARNING: This method is actually not used (at least on skia and wasm) !!!!!!
// cf. UpdateCommonStates instead ...
base.ChangeVisualState(useTransitions);
if (IsListViewBaseItem)
{
var criteria = new ListViewBaseItemVisualStatesCriteria();
criteria.isEnabled = IsEnabled;
criteria.isSelected = IsSelected;
criteria.focusState = FocusState;
// Pressed state should be handled whether it's mouse or touch
// m_inCheckboxPressedForTouch is not used because it is part of the 8.1 template
criteria.isPressed = IsPointerPressed;
criteria.isPointerOver = IsPointerOver;
//criteria.isDragVisualCaptured = m_dragVisualCaptured; // Uno TODO
if (Selector is ListViewBase spListView)
{
criteria.isDragging = spListView.IsInDragDrop();
criteria.isDraggedOver = spListView.IsDragOverItem(this);
criteria.dragItemsCount = spListView.DragItemsCount();
criteria.isItemDragPrimary = spListView.IsContainerDragDropOwner(this);
// Holding gesture will show drag visual
criteria.canDrag = spListView.CanDragItems;
criteria.canReorder = spListView.CanReorderItems;
if (spListView.GetIsHolding())
{
criteria.isHolding = true;
// Uno TODO
//if (m_isHolding)
//{
// criteria.isItemDragPrimary = true;
//}
}
criteria.isMultiSelect = spListView.IsMultiSelectCheckBoxEnabled;
var selectionMode = spListView.SelectionMode;
// if the ListView selection mode is None, we should appear as not Selected
criteria.isSelected &= (selectionMode != ListViewSelectionMode.None);
// Read-only mode
{
bool isItemClickEnabled = false;
isItemClickEnabled = spListView.IsItemClickEnabled;
if (selectionMode == ListViewSelectionMode.None && !isItemClickEnabled)
{
criteria.isPressed = false;
criteria.isPointerOver = false;
}
}
if (criteria.isMultiSelect)
{
criteria.isMultiSelect &= spListView.SelectionMode == ListViewSelectionMode.Multiple;
}
criteria.isInsideListView = true;
foreach (var state in VisualStatesHelper.GetValidVisualStatesListViewBaseItem(criteria))
{
GoToState(useTransitions, state);
}
}
}
}
