internal override void OnOrientationChanged(Orientation newValue)
{
base.OnOrientationChanged(newValue);
if (this.owner == null || !this.owner.IsTemplateApplied)
{
return;
}
if (this.owner.GetItemCount() > 0)
{
this.owner.StopAllAddedAnimations();
this.owner.StopAllRemovedAnimations();
IDataSourceItem firstViewportItem = this.GetTopVisibleContainer().associatedDataItem;
while (this.owner.realizedItems.Count > 0)
{
RadDataBoundListBoxItem lastItem = this.owner.realizedItems[this.owner.realizedItems.Count - 1] as RadDataBoundListBoxItem;
lastItem.SetVerticalOffset(0);
lastItem.SetHorizontalOffset(0);
this.owner.RecycleLastItem();
}
this.owner.initialVirtualizationItem = firstViewportItem;
this.owner.BeginAsyncBalance();
this.owner.BalanceVisualSpace();
}
}
private void UpdateContainerVisualState(DataSourceItem item)
{
RadDataBoundListBoxItem container = this.owner.GetContainerFromDataSourceItem(item) as RadDataBoundListBoxItem;
if (container != null)
{
container.UpdateCheckedState();
}
}
private void OnItemReorderStateChanged(bool isActive, RadDataBoundListBoxItem targetItem)
{
EventHandler <ItemReorderStateChangedEventArgs> eh = this.ItemReorderStateChanged;
if (eh != null)
{
eh(this, new ItemReorderStateChangedEventArgs(isActive, targetItem));
}
}
internal virtual bool IsItemCheckable(RadDataBoundListBoxItem item)
{
if (item.associatedDataItem == RadDataBoundListBox.ListHeaderIndicator ||
item.associatedDataItem == RadDataBoundListBox.ListFooterIndicator ||
item.associatedDataItem == RadDataBoundListBox.IncrementalLoadingIndicator)
{
return(false);
}
return(true);
}
internal virtual bool IsCheckModeArea(RadDataBoundListBoxItem item, UIElement container, Point hitPoint)
{
if (!ElementTreeHelper.IsElementRendered(item) || !ElementTreeHelper.IsElementRendered(container as FrameworkElement))
{
return(false);
}
Point relativeOffset = container.TransformToVisual(item).TransformPoint(new Point(0, 0));
hitPoint = new Point(relativeOffset.X + hitPoint.X, relativeOffset.Y + hitPoint.Y);
return(item.IsPointInCheckModeAreaForItem(hitPoint));
}
internal virtual void OnItemMouseHold(RadDataBoundListBoxItem item)
{
if (!this.isItemReorderEnabledCache || !this.IsItemReorderSupported)
{
return;
}
if (item.associatedDataItem.Value == null || this.listSource.FindItem(item.associatedDataItem.Value) == null)
{
return;
}
this.StartItemReorderForItem(item);
}
/// <summary>
/// Handles check toggle request from a child visual item.
/// </summary>
internal virtual void HandleItemCheckStateChange(RadDataBoundListBoxItem item)
{
if (this.checkedItems.IsReadOnly)
{
return;
}
if (!item.IsChecked)
{
this.AddCheckedItem(item.associatedDataItem as DataSourceItem);
}
else
{
this.RemoveCheckedItem(item.associatedDataItem as DataSourceItem);
}
}
internal void ShowCheckboxesPressIndicator(RadDataBoundListBoxItem targetItem)
{
if (this.indicatorVisible)
{
return;
}
this.indicatorVisible = true;
Rect coordinates = targetItem.GetCheckBoxesIndicatorRectangleForItem(this.checkBoxesPressIndicator.Margin);
this.checkBoxesPressIndicator.Height = coordinates.Height;
this.checkBoxesPressIndicator.Width = coordinates.Width;
this.indicatorTranslate.Y = coordinates.Y;
this.indicatorTranslate.X = coordinates.X;
this.checkBoxesIndicatorAnimation.To = 1.0;
this.checkBoxesIndicatorStoryboard.Begin();
}
internal void StartItemReorderForItem(RadDataBoundListBoxItem item)
{
this.UnsubscribeRendering();
this.itemReorderControl.targetItem = item;
foreach (RadVirtualizingDataControlItem container in this.realizedItems)
{
if (container != item)
{
VisualStateManager.GoToState(container, "ItemOrdered", false);
}
}
this.itemReorderPopup.IsOpen = true;
this.itemReorderControl.EvaluateButtonsAvailability();
}
/// <summary>
/// Toggles the Item Reorder popup on or off according to the argument's value.
/// </summary>
/// <param name="pivotItem">The visual container which will be used as a pivot item to start the reordering.</param>
public void ActivateItemReorderForItem(RadDataBoundListBoxItem pivotItem)
{
if (!this.IsProperlyTemplated)
{
return;
}
if (!this.IsItemReorderSupported)
{
return;
}
if (this.itemReorderPopup.IsOpen)
{
return;
}
this.StartItemReorderForItem(pivotItem);
}
/// <summary>
/// Initializes a new instance of the <see cref="ItemReorderStateChangedEventArgs"/> class.
/// </summary>
/// <param name="isActive">If set to <c>true</c> [is active].</param>
/// <param name="container">The container.</param>
internal ItemReorderStateChangedEventArgs(bool isActive, RadDataBoundListBoxItem container)
{
this.IsReorderActive = isActive;
this.PivotItem = container;
}
/// <summary>
/// Initializes a new instance of the <see cref="ListBoxItemTapEventArgs"/> class.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="manipulationContainer">The container of the item.</param>
/// <param name="originalSource">The element from which the manipulation originates.</param>
/// <param name="manipulationOrigin">The point at which the item was tapped.</param>
public ListBoxItemTapEventArgs(RadDataBoundListBoxItem item, UIElement manipulationContainer, UIElement originalSource, Point manipulationOrigin)
: this(item, manipulationContainer, manipulationOrigin)
{
this.originalSource = originalSource;
}
/// <summary>
/// Initializes a new instance of the <see cref="ListBoxItemTapEventArgs"/> class.
/// </summary>
/// <param name="item">The item.</param>
/// <param name="manipulationContainer">The container of the item.</param>
/// <param name="manipulationOrigin">The point at which the item was tapped.</param>
public ListBoxItemTapEventArgs(RadDataBoundListBoxItem item, UIElement manipulationContainer, Point manipulationOrigin)
{
this.item = item;
this.manipulationOrigin = manipulationOrigin;
this.manipulationContainer = manipulationContainer;
}
private void ReorderViewportItemsStartingAtRow(WrapRow row)
{
WrapRow parentRow = row;
RadDataBoundListBoxItem processedItem = parentRow.firstItem as RadDataBoundListBoxItem;
parentRow.lastItem = processedItem;
processedItem.wrapRow = parentRow;
parentRow.rowOffset = this.GetRowOffset(parentRow);
double currentRowPosition = 0;
while (true)
{
this.SetItemOffset(processedItem, parentRow.rowOffset);
processedItem.wrapRow = parentRow;
switch (this.orientationCache)
{
case Orientation.Horizontal:
processedItem.SetHorizontalOffset(currentRowPosition);
break;
case Orientation.Vertical:
processedItem.SetVerticalOffset(currentRowPosition);
break;
}
currentRowPosition += this.GetItemExtent(processedItem);
double itemLength = this.GetItemLength(processedItem);
if (itemLength > parentRow.rowLength)
{
parentRow.rowLength = itemLength;
}
processedItem = processedItem.next as RadDataBoundListBoxItem;
if (processedItem == null)
{
int wrapRowsCount = this.wrapRows.Count;
this.OnRowFilled(parentRow, true);
while (this.lastWrapRow != parentRow)
{
int indexOfRowToRemove = --wrapRowsCount;
this.RemoveWrapRowAt(indexOfRowToRemove);
}
break;
}
else if (!this.CheckEnoughSpaceForItemInRow(parentRow, processedItem, true))
{
parentRow.lastItem = processedItem.previous;
currentRowPosition = 0;
this.OnRowFilled(parentRow, false);
if (parentRow.next == null)
{
parentRow = this.InsertWrapRowAt(this.wrapRows.Count);
}
else
{
parentRow = parentRow.next;
}
parentRow.rowOffset = this.GetRowOffset(parentRow);
parentRow.firstItem = processedItem;
parentRow.lastItem = processedItem;
parentRow.rowLength = this.GetItemLength(processedItem);
}
else
{
parentRow.lastItem = processedItem;
}
}
}
