/// <summary>
/// Unchecks the given item.
/// </summary>
/// <param name="pItem">The item to uncheck.</param>
public void Uncheck(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.CheckModel.Uncheck(pItem, false);
}
}
/// <summary>
/// This method expands a node.
/// </summary>
/// <param name="pItem">The target node.</param>
/// <param name="pValue">True to set the node as expanded.</param>
public void SetIsExpanded(IHierarchicalItemViewModel pItem, bool pValue)
{
if (this.BeginProcessingExpand())
{
if (pItem.HasChildren)
{
if (pValue)
{
pItem.IsExpanded = pValue;
this.mParent.LoadsChildrenItems(pItem);
}
else
{
// When collapsed, if any child is selected, then all the item are unselected and the collapsed item is selected.
if (this.mParent.SelectionModel.SelectedItemsViewModel.Any(lSelectedItem => pItem.AllVisibleChildren.Contains(lSelectedItem)))
{
this.mParent.SelectionModel.Select(pItem);
}
this.mParent.DropChildrenItems(pItem, false);
pItem.IsExpanded = pValue;
}
}
this.EndProcessingExpand();
}
}
/// <summary>
/// Expands the given item.
/// </summary>
/// <param name="pItem">The item to expand.</param>
public void Expand(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ExpandModel.SetIsExpanded(pItem, true);
}
}
/// <summary>
/// This method expands a node.
/// </summary>
/// <param name="pItem">The target node.</param>
/// <param name="pValue">True to set the node as expanded.</param>
public void SetIsExpanded(IHierarchicalItemViewModel pItem, bool pValue)
{
if (this.BeginProcessingExpand())
{
if (pItem.HasChildren)
{
if (pValue)
{
pItem.IsExpanded = pValue;
this.mParent.LoadsChildrenItems(pItem);
}
else
{
// When collapsed, if any child is selected, then all the item are unselected and the collapsed item is selected.
if (this.mParent.SelectionModel.SelectedViewModels.Any(lSelectedItem => pItem.AllVisibleChildren.Contains(lSelectedItem)))
{
this.mParent.SelectionModel.Select(pItem);
}
this.mParent.DropChildrenItems(pItem, false);
pItem.IsExpanded = pValue;
}
}
this.EndProcessingExpand();
}
}
/// <summary>
/// Collapses the given item.
/// </summary>
/// <param name="pItem">The item to expand.</param>
public void Collapse(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ExpandModel.SetIsExpanded(pItem, false);
}
}
/// <summary>
/// This method forces the item to be visible in the viewport.
/// </summary>
/// <param name="pItem">The item to make visible into the viewport.</param>
public void ScrollToItem(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ScrollIntoView(pItem, true);
}
}
/// <summary>
/// Adds the given to the selection.
/// </summary>
/// <param name="pItem">The item to add to the selection.</param>
/// <param name="pUpdatePivot">Flag to know if the pivot must be updated.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalAddToSelection(IHierarchicalItemViewModel pItem, bool pUpdatePivot, bool pNotify)
{
if (pItem.CanBeSelected && pItem.IsSelected == false)
{
// Updating view model.
pItem.IsSelected = true;
// Updating the selected items list.
this.mSelectedViewModels.Add(pItem);
// Setting the pivot.
if (pUpdatePivot)
{
this.Anchor = pItem;
}
// Updating native selection handling.
if (this.SelectionMode == TreeSelectionMode.SingleSelection)
{
this.mParent.SelectedItem = pItem;
}
else
{
this.mParent.SelectedItems.Add(pItem);
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(new IHierarchicalItemViewModel[] { }, new IHierarchicalItemViewModel[] { pItem });
}
}
}
/// <summary>
/// This method unselects an item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
public void Unselect(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.SelectionModel.Unselect(pItem, false);
}
}
/// <summary>
/// Selects a range of items.
/// </summary>
/// <param name="pFrom">The range start view model.</param>
/// <param name="pTo">The range stop view model.</param>
public void SelectRange(IHierarchicalItemViewModel pFrom, IHierarchicalItemViewModel pTo)
{
if (this.SelectionMode != TreeSelectionMode.NoSelection)
{
this.InternalSelectRange(pFrom, pTo, true);
}
}
/// <summary>
/// Uncheck the item.
/// </summary>
/// <param name="pItem">The item to uncheck.</param>
/// <param name="pUncheckChildren">Flag defining if the children have to be unchecked as well.</param>
public void Uncheck(IHierarchicalItemViewModel pItem, bool pUncheckChildren)
{
if ((pItem.IsChecked && pItem.IsCheckable && pItem.IsCheckingEnabled) ||
(pUncheckChildren)
)
{
// Update.
IHierarchicalItemViewModel[] lUncheckedItems;
if (pUncheckChildren)
{
lUncheckedItems = pItem.UncheckAll();
}
else
{
pItem.IsChecked = false;
lUncheckedItems = new IHierarchicalItemViewModel[] { pItem };
}
if (lUncheckedItems.Any())
{
foreach (IHierarchicalItemViewModel lItem in lUncheckedItems)
{
this.mCheckedItemsViewModel.Remove(lItem);
}
// Notification.
this.NotifyItemsToggled(lUncheckedItems);
}
}
}
/// <summary>
/// Adds the given to the selection.
/// </summary>
/// <param name="pItem">The item to add to the selection.</param>
public void AddToSelection(IHierarchicalItemViewModel pItem)
{
if (this.SelectionMode != TreeSelectionMode.NoSelection)
{
this.InternalAddToSelection(pItem, true, true);
}
}
/// <summary>
/// Notifies a check modification.
/// </summary>
/// <param name="pToggledItem">The toogled item.</param>
private void NotifyItemToggled(IHierarchicalItemViewModel pToggledItem)
{
if (this.ItemsViewModelToggled != null)
{
this.ItemsViewModelToggled(this, new IHierarchicalItemViewModel[] { pToggledItem });
}
}
/// <summary>
/// Check the item.
/// </summary>
/// <param name="pItem">The item to check.</param>
/// <param name="pCheckChildren">Flag defining if the children have to be checked as well.</param>
public void Check(IHierarchicalItemViewModel pItem, bool pCheckChildren)
{
if ((pItem.IsChecked == false && pItem.IsCheckable && pItem.IsCheckingEnabled) ||
(pCheckChildren)
)
{
// Update.
IHierarchicalItemViewModel[] lCheckedItems;
if (pCheckChildren)
{
lCheckedItems = pItem.CheckAll();
}
else
{
pItem.IsChecked = true;
lCheckedItems = new IHierarchicalItemViewModel[] { pItem };
}
if (lCheckedItems.Any())
{
this.mCheckedItemsViewModel.AddRange(lCheckedItems);
// Notification.
this.NotifyItemsToggled(lCheckedItems);
}
}
}
/// <summary>
/// Selects a range of items.
/// </summary>
/// <param name="pFrom">The range start view model.</param>
/// <param name="pTo">The range stop view model.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalSelectRange(IHierarchicalItemViewModel pFrom, IHierarchicalItemViewModel pTo, bool pNotify)
{
if (this.SelectionMode != TreeSelectionMode.SingleSelection)
{
// Getting the indexes of the selection range.
int lFromIndex = this.mParent.Rows.IndexOf(pFrom);
int lToIndex = this.mParent.Rows.IndexOf(pTo);
if (lFromIndex > lToIndex)
{
// Swap values.
int lTemp = lFromIndex;
lFromIndex = lToIndex;
lToIndex = lTemp;
}
// Building the list of items to select.
List <IHierarchicalItemViewModel> lItemsToSelect = new List <IHierarchicalItemViewModel>();
for (int lIndex = lFromIndex; lIndex <= lToIndex; lIndex++)
{
IHierarchicalItemViewModel lItem = this.mParent.Rows.ElementAtOrDefault(lIndex);
if (lItem != null)
{
lItemsToSelect.Add(lItem);
}
}
if (lItemsToSelect.Any())
{
// Update.
this.InternalSelect(lItemsToSelect, false, pNotify);
}
}
}
/// <summary>
/// Removes the children from the rows.
/// </summary>
/// <param name="pViewModel">The view model containing the rows.</param>
/// <param name="pIncludeParent">Flag indicating if the parent must be droped has well.</param>
internal void DropChildrenItems(IHierarchicalItemViewModel pViewModel, bool pIncludeParent)
{
if (pViewModel.ChildrenAreLoaded)
{
int lStartIndex = this.Rows.IndexOf(pViewModel);
int lCount = pViewModel.AllVisibleChildren.Count();
if (pIncludeParent == false)
{
lStartIndex++;
}
else
{
lCount++;
}
// The item must be in the children list.
if (lStartIndex != -1)
{
this.Rows.RemoveRange(lStartIndex, lCount);
}
pViewModel.ChildrenAreLoaded = false;
pViewModel.AllVisibleChildren.Where(lItem => lItem.IsExpanded).ForEach(lItem => lItem.ChildrenAreLoaded = false);
}
}
/// <summary>
/// Delegate called when items are removed from the view model.
/// </summary>
/// <param name="pSender">The modified root view model.</param>
/// <param name="pItem">The removed item.</param>
/// <param name="pOldIndex">The old index of the item.</param>
/// <param name="pNewIndex">THe new index of the item.</param>
private void OnItemViewModelMoved(object pSender, IHierarchicalItemViewModel pItem, int pOldIndex, int pNewIndex)
{
if (pItem != null)
{
// Computing the row indexes.
int lOldRowIndex = pOldIndex;
int lNewRowIndex = pNewIndex;
if (pItem.Parent != null && pItem.Parent is IRootHierarchicalItemViewModel == false)
{
int lParentRowIndex = this.Rows.IndexOf(pItem.Parent);
lOldRowIndex = lParentRowIndex + pOldIndex + 1;
lNewRowIndex = lParentRowIndex + pNewIndex + 1;
}
// Removing the items from the tree view if they are displayed.
if (pItem.IsExpanded)
{
this.DropChildrenItems(pItem, true);
}
else
{
this.Rows.Remove(pItem);
}
// Adding the item in the rows.
if (lNewRowIndex >= this.Rows.Count)
{
this.Rows.Add(pItem);
}
else
{
this.Rows.Insert(lNewRowIndex, pItem);
}
}
}
/// <summary>
/// Converts the tree configuration to the item group state.
/// </summary>
/// <param name="pValues">The values defining the tree configuration.</param>
/// <param name="pTargetType">The target type.</param>
/// <param name="pParameter">The additional parameters.</param>
/// <param name="pCulture">The culture to use during the conversion.</param>
/// <returns>The returned item group state.</returns>
public object Convert(object[] pValues, Type pTargetType, object pParameter, CultureInfo pCulture)
{
Debug.Assert(pValues.Count() == 2);
try
{
#pragma warning disable 1587
/// To be a group, an item must have the root as its parent view model, and the FirstLevelItemAsGroup property to true.
/// First parameter is the view model, second is the FirstLevelItemAsGroup property.
#pragma warning restore 1587
IHierarchicalItemViewModel lViewModel = pValues[0] as IHierarchicalItemViewModel;
bool lFirstLevelItemAsGroup = System.Convert.ToBoolean(pValues[1]);
if
((lViewModel != null) &&
(lViewModel.Parent is IRootHierarchicalItemViewModel) &&
(lFirstLevelItemAsGroup)
)
{
return(true);
}
return(false);
}
catch
{
return(Binding.DoNothing);
}
}
/// <summary>
/// Check the item.
/// </summary>
/// <param name="pItem">The item to check.</param>
/// <param name="pCheckChildren">Flag defining if the children have to be checked as well.</param>
public void Check(IHierarchicalItemViewModel pItem, bool pCheckChildren)
{
if ( (pItem.IsChecked == false && pItem.IsCheckable && pItem.IsCheckingEnabled)
|| (pCheckChildren)
)
{
// Update.
IHierarchicalItemViewModel[] lCheckedItems;
if (pCheckChildren)
{
lCheckedItems = pItem.CheckAll();
}
else
{
pItem.IsChecked = true;
lCheckedItems = new IHierarchicalItemViewModel[] { pItem };
}
if (lCheckedItems.Any())
{
this.mCheckedItemsViewModel.AddRange(lCheckedItems);
// Notification.
this.NotifyItemsToggled(lCheckedItems);
}
}
}
/// <summary>
/// Method to call when children are removed from this view model.
/// </summary>
/// <param name="pChild">The child added to the children list.</param>
protected sealed override void NotifyChildRemoved(IHierarchicalItemViewModel pChild)
{
if (this.ItemViewModelsRemoved != null)
{
this.ItemViewModelsRemoved(this, new IHierarchicalItemViewModel[] { pChild });
}
}
/// <summary>
/// Method to call when children are removed from this view model.
/// </summary>
/// <param name="pChild">The child added to the children list.</param>
/// <param name="pOldIndex">The old index of the item.</param>
/// <param name="pNewIndex">THe new index of the item.</param>
protected sealed override void NotifyChildMoved(IHierarchicalItemViewModel pChild, int pOldIndex, int pNewIndex)
{
if (this.ItemViewModelMoved != null)
{
this.ItemViewModelMoved(this, pChild, pOldIndex, pNewIndex);
}
}
/// <summary>
/// Unselect the given item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalUnselect(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.IsSelected)
{
// Updating view model.
pItem.IsSelected = false;
// Updating the selected items list.
this.mSelectedViewModels.Remove(pItem);
// Updating the pivot.
if (this.Anchor == pItem)
{
this.Anchor = null;
}
// Updating native selection handling.
if (this.SelectionMode == TreeSelectionMode.SingleSelection)
{
this.mParent.SelectedItem = null;
}
else
{
this.mParent.SelectedItems.Remove(pItem);
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(new IHierarchicalItemViewModel[] { pItem }, new IHierarchicalItemViewModel[] { });
}
}
}
/// <summary>
/// Delegate called when the mouse clicked on this item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
internal void OnItemMouseClicked(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
// Notification.
if (this.ItemViewModelClicked != null)
{
this.ItemViewModelClicked(this, new IHierarchicalItemViewModel[] { pItem });
}
}
/// <summary>
/// Delegate called when the mouse left button is down on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseLeftButtonDown(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
if (System.Windows.Input.Keyboard.IsKeyDown(Key.LeftCtrl) || System.Windows.Input.Keyboard.IsKeyDown(Key.RightCtrl))
{
if (this.mParent.SelectionModel.SelectionMode == TreeSelectionMode.MultiSelection)
{
if (pItem.CanBeSelected)
{
if (pItem.IsSelected == false)
{
this.mParent.SelectionModel.AddToSelection(pItem);
}
else
{
this.mParent.SelectionModel.Unselect(pItem, false);
}
}
}
}
else if (System.Windows.Input.Keyboard.IsKeyDown(Key.LeftShift) || System.Windows.Input.Keyboard.IsKeyDown(Key.RightShift))
{
if (this.mParent.SelectionModel.SelectionMode == TreeSelectionMode.MultiSelection)
{
if (pItem.CanBeSelected)
{
if (this.mParent.SelectionModel.Anchor == null)
{
this.mParent.SelectionModel.Select(pItem);
}
else
{
this.mParent.SelectionModel.SelectRange(this.mParent.SelectionModel.Anchor, pItem);
}
}
}
}
else
{
// Default behavior.
if (this.mParent.SelectionModel.SelectionMode == TreeSelectionMode.SingleSelection)
{
if (pItem.CanBeSelected)
{
this.mParent.SelectionModel.Select(pItem);
}
}
else if (this.mParent.SelectionModel.SelectionMode == TreeSelectionMode.MultiSelection)
{
if (pItem.CanBeSelected)
{
this.mParent.SelectionModel.Select(pItem);
}
}
}
}
/// <summary>
/// Delegate called when the mouse left button is up on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseLeftButtonUp(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
if (System.Windows.Input.Keyboard.Modifiers == System.Windows.Input.ModifierKeys.None &&
pItem.CanBeSelected)
{
if (pItem.IsSelected && this.mParent.SelectionModel.SelectedViewModels.Count() > 1)
{
this.mParent.SelectionModel.Select(pItem);
}
}
}
/// <summary>
/// Unselect the given item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pUnselectChildren">Unselect the children as well.</param>
public void Unselect(IHierarchicalItemViewModel pItem, bool pUnselectChildren)
{
if (pUnselectChildren)
{
this.InternalUnselectAndChildren(pItem, true);
}
else
{
this.InternalUnselect(pItem, true);
}
}
/// <summary>
/// Delegate called when the mouse double clicked on this item.
/// </summary>
/// <param name="pItem">The double clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
internal void OnItemMouseDoubleClicked(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
// Handling the expand.
this.mExpandBehavior.OnItemMouseDoubleClicked(pItem, pEventArgs);
// Notification.
if (this.ItemViewModelDoubleClicked != null)
{
this.ItemViewModelDoubleClicked(this, new IHierarchicalItemViewModel[] { pItem });
}
}
/// <summary>
/// Loads the children of this item in the control.
/// </summary>
/// <param name="pViewModel">The view model containing the children.</param>
internal void LoadsChildrenItems(IHierarchicalItemViewModel pViewModel)
{
if (pViewModel.ChildrenAreLoaded == false)
{
int lStartIndex = this.Rows.IndexOf(pViewModel);
this.Rows.InsertRange(lStartIndex + 1, pViewModel.AllVisibleChildren.ToArray());
pViewModel.ChildrenAreLoaded = true;
pViewModel.AllVisibleChildren.Where(lItem => lItem.IsExpanded).ForEach(lItem => lItem.ChildrenAreLoaded = true);
}
}
/// <summary>
/// Toggles the expand state of the given item.
/// </summary>
/// <param name="pItem">The item to toggle expand.</param>
public void ToggleExpand(IHierarchicalItemViewModel pItem)
{
if (pItem.HasChildren)
{
if (pItem.IsExpanded == false)
{
this.SetIsExpanded(pItem, true);
}
else
{
this.SetIsExpanded(pItem, false);
}
}
}
/// <summary>
/// Delegate called when the mouse right button is down on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseRightButtonDown(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
if (pItem.CanBeSelected)
{
if (pItem.IsSelected == false)
{
this.mParent.SelectionModel.Select(pItem);
}
}
else
{
this.mParent.SelectionModel.UnselectAll();
}
}
/// <summary>
/// Toggles the expand state of the given item.
/// </summary>
/// <param name="pItem">The item to toggle expand.</param>
public void ToggleExpand(IHierarchicalItemViewModel pItem)
{
if (pItem.HasChildren)
{
if (pItem.IsExpanded == false)
{
this.SetIsExpanded(pItem, true);
}
else
{
this.SetIsExpanded(pItem, false);
}
}
}
/// <summary>
/// Select the given item.
/// </summary>
/// <param name="pItem">The selected item.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalSelect(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.CanBeSelected && (pItem.IsSelected == false || this.mSelectedViewModels.Count > 1))
{
// Update.
IHierarchicalItemViewModel[] lOldSelection = this.SelectedViewModels.ToArray();
this.InternalUnselectAll(true, false);
this.InternalAddToSelection(pItem, true, false);
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(lOldSelection, new IHierarchicalItemViewModel[] { pItem });
}
}
}
/// <summary>
/// Unselect the given item and all its children.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalUnselectAndChildren(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.IsSelected)
{
IHierarchicalItemViewModel[] lOldSelection = this.SelectedViewModels.ToArray();
List <IHierarchicalItemViewModel> lRemovedItems = new List <IHierarchicalItemViewModel>();
lRemovedItems.AddRange(pItem.UnSelectAll());
if (lRemovedItems.Any())
{
// Updating the selected items list.
foreach (IHierarchicalItemViewModel lItem in lRemovedItems)
{
this.mSelectedViewModels.Remove(lItem);
}
// Updating the pivot.
if (lRemovedItems.Contains(this.Anchor))
{
this.Anchor = null;
}
// Updating native selection handling.
if (this.SelectionMode == TreeSelectionMode.SingleSelection)
{
this.mParent.SelectedItem = null;
}
else
{
foreach (IHierarchicalItemViewModel lItem in lRemovedItems)
{
this.mParent.SelectedItems.Remove(lItem);
}
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(lRemovedItems.ToArray(), new IHierarchicalItemViewModel[] { });
}
}
}
}
/// <summary>
/// Convert from Level to Tickness.
/// </summary>
/// <param name="pValue">The value to convert.</param>
/// <param name="pTargetType">The target type.</param>
/// <param name="pExtraParameter">The extra parameter to use (not used by the lConverter).</param>
/// <param name="pCulture">The culture to use (not used by the lConverter).</param>
/// <returns>The value converted.</returns>
public object Convert(object pValue, Type pTargetType, object pExtraParameter, CultureInfo pCulture)
{
int lLevel = 0;
IHierarchicalItemViewModel lItemToIndent = pValue as IHierarchicalItemViewModel;
if
(lItemToIndent != null)
{
IHierarchicalItemViewModel lCurrentItem = lItemToIndent;
while
(lCurrentItem.Parent != null)
{
lCurrentItem = lCurrentItem.Parent;
lLevel++;
}
}
return(new Thickness(lLevel * LevelToIndentConverter.IndentSize, 0, 0, 0));
}
/// <summary>
/// Delegate called when the mouse left button is down on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseLeftButtonDown(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
if (System.Windows.Input.Keyboard.Modifiers == System.Windows.Input.ModifierKeys.None)
{
if (this.mParent.SelectionModel.SelectionOption == TreeSelectionOptions.SingleSelection)
{
this.mParent.SelectionModel.Select(pItem);
}
else if (this.mParent.SelectionModel.SelectionOption == TreeSelectionOptions.MultiSelection)
{
this.mParent.SelectionModel.Select(pItem);
}
}
else if (System.Windows.Input.Keyboard.Modifiers == System.Windows.Input.ModifierKeys.Control)
{
if (this.mParent.SelectionModel.SelectionOption == TreeSelectionOptions.MultiSelection)
{
this.mParent.SelectionModel.AddToSelection(pItem);
}
}
}
/// <summary>
/// Delegate called when the mouse double clicked on this item.
/// </summary>
/// <param name="pItem">The double clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseDoubleClicked(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
this.mParent.ExpandModel.ToggleExpand(pItem);
}
/// <summary>
/// Notifies a selection modification.
/// </summary>
/// <param name="pRemovedItems">The items removed from the selection.</param>
/// <param name="pAddedItems">The items added to the selection.</param>
private void NotifySelectionChanged(IHierarchicalItemViewModel[] pRemovedItems, IHierarchicalItemViewModel[] pAddedItems)
{
if (this.SelectionChanged != null)
{
SelectionChangedEventArgs lArgs = new SelectionChangedEventArgs(pRemovedItems, pAddedItems);
this.SelectionChanged(this, lArgs);
}
}
/// <summary>
/// Unselect the given item and all its children.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalUnselectAndChildren(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.IsSelected)
{
IHierarchicalItemViewModel[] lOldSelection = this.SelectedItemsViewModel.ToArray();
List<IHierarchicalItemViewModel> lRemovedItems = new List<IHierarchicalItemViewModel>();
lRemovedItems.AddRange(pItem.UnSelectAll());
if (lRemovedItems.Any())
{
// Updating the selected items list.
foreach (IHierarchicalItemViewModel lItem in lRemovedItems)
{
this.mSelectedItemsViewModel.Remove(lItem);
}
// Updating native selection handling.
if (this.mParent.SelectionMode == System.Windows.Controls.SelectionMode.Single)
{
this.mParent.SelectedItem = null;
}
else
{
foreach (IHierarchicalItemViewModel lItem in lRemovedItems)
{
this.mParent.SelectedItems.Remove(lItem);
}
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(lRemovedItems.ToArray(), new IHierarchicalItemViewModel[] { });
}
}
}
}
/// <summary>
/// This method unselects an item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
public void Unselect(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.SelectionModel.Unselect(pItem, false);
}
}
/// <summary>
/// Delegate called when the mouse right button is down on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
internal void OnItemMouseRightButtonDown(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
// Handling the selection.
this.mSelectionBehavior.OnItemMouseRightButtonDown(pItem, pEventArgs);
}
/// <summary>
/// This method forces the item to be visible in the viewport.
/// </summary>
/// <param name="pItem">The item to make visible into the viewport.</param>
public void ScrollToItem(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ScrollIntoView(pItem, true);
}
}
/// <summary>
/// Select the given item.
/// </summary>
/// <param name="pItem">The selected item.</param>
public void Select(IHierarchicalItemViewModel pItem)
{
if (this.SelectionOption != TreeSelectionOptions.NoSelection)
{
this.InternalSelect(pItem, true);
}
}
/// <summary>
/// Unchecks the given item.
/// </summary>
/// <param name="pItem">The item to uncheck.</param>
public void Uncheck(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.CheckModel.Uncheck(pItem, false);
}
}
/// <summary>
/// Notifies a check modification.
/// </summary>
/// <param name="pToggledItem">The toogled item.</param>
private void NotifyItemToggled(IHierarchicalItemViewModel pToggledItem)
{
if (this.ItemsViewModelToggled != null)
{
this.ItemsViewModelToggled(this, new IHierarchicalItemViewModel[] { pToggledItem });
}
}
/// <summary>
/// Notifies a check modification.
/// </summary>
/// <param name="pToggledItem">The toogled item.</param>
private void NotifyItemsToggled(IHierarchicalItemViewModel[] pToggledItem)
{
if (this.ItemsViewModelToggled != null)
{
this.ItemsViewModelToggled(this, pToggledItem);
}
}
/// <summary>
/// Uncheck the item.
/// </summary>
/// <param name="pItem">The item to uncheck.</param>
/// <param name="pUncheckChildren">Flag defining if the children have to be unchecked as well.</param>
public void Uncheck(IHierarchicalItemViewModel pItem, bool pUncheckChildren)
{
if ( (pItem.IsChecked && pItem.IsCheckable && pItem.IsCheckingEnabled)
|| (pUncheckChildren)
)
{
// Update.
IHierarchicalItemViewModel[] lUncheckedItems;
if (pUncheckChildren)
{
lUncheckedItems = pItem.UncheckAll();
}
else
{
pItem.IsChecked = false;
lUncheckedItems = new IHierarchicalItemViewModel[] { pItem };
}
if (lUncheckedItems.Any())
{
foreach (IHierarchicalItemViewModel lItem in lUncheckedItems)
{
this.mCheckedItemsViewModel.Remove(lItem);
}
// Notification.
this.NotifyItemsToggled(lUncheckedItems);
}
}
}
/// <summary>
/// Delegate called when the item expander gets unchecked.
/// </summary>
/// <param name="pItem">The unchecked item.</param>
public void OnItemExpanderUnchecked(IHierarchicalItemViewModel pItem)
{
this.mParent.ExpandModel.SetIsExpanded(pItem, false);
}
/// <summary>
/// Delegate called when a key is pressed when the item get the focus.
/// </summary>
/// <param name="pItem">The key up item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemKeyUp(IHierarchicalItemViewModel pItem, System.Windows.Input.KeyEventArgs pEventArgs)
{
if (pEventArgs.KeyboardDevice.Modifiers == System.Windows.Input.ModifierKeys.None)
{
// Handling the selection when right arrow key is pressed.
if (pEventArgs.Key == System.Windows.Input.Key.Right)
{
if (pItem != null)
{
if (pItem.HasChildren)
{
if (pItem.IsExpanded)
{
// If not expanded, just expand it.
this.mParent.ExpandModel.SetIsExpanded(pItem, true);
}
else
{
// Otherwise, selecting the first child if any.
IHierarchicalItemViewModel lFirstChild = pItem.Children.FirstOrDefault();
if (lFirstChild != null)
{
this.mParent.ScrollIntoView(lFirstChild, true);
}
}
}
}
}
// Handling the selection when left arrow key is pressed.
if (pEventArgs.Key == System.Windows.Input.Key.Left)
{
if (this.mParent.SelectionModel.SelectedItemsViewModel.Count() > 1)
{
// Selecting the first element with no selected parent.
IHierarchicalItemViewModel lFoundItem = this.mParent.SelectionModel.SelectedItemsViewModel.FirstOrDefault(lItem => (lItem.Parent == null) || (lItem.Parent.IsSelected == false));
if (lFoundItem != null)
{
this.mParent.ScrollIntoView(lFoundItem, true);
}
}
else
{
if (pItem != null)
{
// This item is the only one selected.
if (pItem.IsExpanded)
{
this.mParent.ExpandModel.SetIsExpanded(pItem, false);
}
else if
( (pItem.Parent != null)
&& (pItem.Parent is IRootHierarchicalItemViewModel) == false
)
{
this.mParent.ScrollIntoView(pItem.Parent, true);
}
}
}
}
}
}
/// <summary>
/// Unselect the given item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pUnselectChildren">Unselect the children as well.</param>
public void Unselect(IHierarchicalItemViewModel pItem, bool pUnselectChildren)
{
if (pUnselectChildren)
{
this.InternalUnselectAndChildren(pItem, true);
}
else
{
this.InternalUnselect(pItem, true);
}
}
/// <summary>
/// Expands the given item.
/// </summary>
/// <param name="pItem">The item to expand.</param>
public void Expand(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ExpandModel.SetIsExpanded(pItem, true);
}
}
/// <summary>
/// Select the given item.
/// </summary>
/// <param name="pItem">The selected item.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalSelect(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.CanBeSelected && (pItem.IsSelected == false || this.mSelectedItemsViewModel.Count > 1))
{
// Update.
IHierarchicalItemViewModel[] lOldSelection = this.SelectedItemsViewModel.ToArray();
this.InternalUnselectAll(false);
this.InternalAddToSelection(pItem, false);
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(lOldSelection, new IHierarchicalItemViewModel[] { pItem });
}
}
}
/// <summary>
/// Collapses the given item.
/// </summary>
/// <param name="pItem">The item to expand.</param>
public void Collapse(IHierarchicalItemViewModel pItem)
{
if (this.InnerListView != null)
{
this.InnerListView.ExpandModel.SetIsExpanded(pItem, false);
}
}
/// <summary>
/// Unselect the given item.
/// </summary>
/// <param name="pItem">The item to unselect.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalUnselect(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.IsSelected)
{
// Updating view model.
pItem.IsSelected = false;
// Updating the selected items list.
this.mSelectedItemsViewModel.Remove(pItem);
// Updating native selection handling.
if (this.mParent.SelectionMode == System.Windows.Controls.SelectionMode.Single)
{
this.mParent.SelectedItem = null;
}
else
{
this.mParent.SelectedItems.Remove(pItem);
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(new IHierarchicalItemViewModel[] { pItem }, new IHierarchicalItemViewModel[] { });
}
}
}
/// <summary>
/// Adds the given to the selection.
/// </summary>
/// <param name="pItem">The item to add to the selection.</param>
/// <param name="pNotify">Flag defining if the notification must be done.</param>
private void InternalAddToSelection(IHierarchicalItemViewModel pItem, bool pNotify)
{
if (pItem.CanBeSelected && pItem.IsSelected == false)
{
// Updating view model.
pItem.IsSelected = true;
// Updating the selected items list.
this.mSelectedItemsViewModel.Add(pItem);
// Updating native selection handling.
if (this.mParent.SelectionMode == System.Windows.Controls.SelectionMode.Single)
{
this.mParent.SelectedItem = pItem;
}
else
{
this.mParent.SelectedItems.Add(pItem);
}
// Notification.
if (pNotify)
{
this.NotifySelectionChanged(new IHierarchicalItemViewModel[] { }, new IHierarchicalItemViewModel[] { pItem });
}
}
}
/// <summary>
/// Delegate called when the mouse double clicked on this item.
/// </summary>
/// <param name="pItem">The double clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
internal void OnItemMouseDoubleClicked(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
// Handling the expand.
this.mExpandBehavior.OnItemMouseDoubleClicked(pItem, pEventArgs);
// Notification.
if (this.ItemViewModelDoubleClicked != null)
{
this.ItemViewModelDoubleClicked(this, new IHierarchicalItemViewModel[] { pItem });
}
}
/// <summary>
/// Delegate called when the expander gets unchecked on the given item.
/// </summary>
/// <param name="pItem">The unchecked item.</param>
internal void OnItemExpanderUnchecked(IHierarchicalItemViewModel pItem)
{
// Handling the expand.
this.mExpandBehavior.OnItemExpanderUnchecked(pItem);
}
/// <summary>
/// Delegate called when a key is pressed when the item get the focus.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
internal void OnItemKeyUp(IHierarchicalItemViewModel pItem, System.Windows.Input.KeyEventArgs pEventArgs)
{
// Handling the expand.
this.mExpandBehavior.OnItemKeyUp(null, pEventArgs);
}
/// <summary>
/// Removes the children from the rows.
/// </summary>
/// <param name="pViewModel">The view model containing the rows.</param>
/// <param name="pIncludeParent">Flag indicating if the parent must be droped has well.</param>
internal void DropChildrenItems(IHierarchicalItemViewModel pViewModel, bool pIncludeParent)
{
if (pViewModel.ChildrenAreLoaded)
{
int lStartIndex = this.Rows.IndexOf(pViewModel);
int lCount = pViewModel.AllVisibleChildren.Count();
if (pIncludeParent == false)
{
lStartIndex++;
}
else
{
lCount++;
}
// The item must be in the children list.
if (lStartIndex != -1)
{
this.Rows.RemoveRange(lStartIndex, lCount);
}
pViewModel.ChildrenAreLoaded = false;
}
}
/// <summary>
/// Loads the children of this item in the control.
/// </summary>
/// <param name="pViewModel">The view model containing the children.</param>
internal void LoadsChildrenItems(IHierarchicalItemViewModel pViewModel)
{
if (pViewModel.ChildrenAreLoaded == false)
{
int lStartIndex = this.Rows.IndexOf(pViewModel);
this.Rows.InsertRange(lStartIndex + 1, pViewModel.AllVisibleChildren.ToArray());
pViewModel.ChildrenAreLoaded = true;
pViewModel.AllVisibleChildren.Where(lItem => lItem.IsExpanded).ForEach(lItem => lItem.ChildrenAreLoaded = true);
}
}
/// <summary>
/// Delegate called when the mouse right button is down on an item.
/// </summary>
/// <param name="pItem">The clicked item.</param>
/// <param name="pEventArgs">The event arguments.</param>
public void OnItemMouseRightButtonDown(IHierarchicalItemViewModel pItem, System.Windows.Input.MouseButtonEventArgs pEventArgs)
{
this.mParent.SelectionModel.Select(pItem);
}
/// <summary>
/// Scrolls the view to show the wanted item to the user.
/// </summary>
/// <param name="pItem">The item to bring.</param>
/// <param name="pSelect">Flag indicating if the selected item must be selected.</param>
/// <returns>True if the item is loaded, false otherwise.</returns>
public bool ScrollIntoView(IHierarchicalItemViewModel pItem, bool pSelect)
{
if ( (pItem != null)
&& (pItem.Parent != null)
)
{
// Expand its parent to make pItem visible.
pItem.Parent.IsExpanded = true;
// Showing the added item.
this.ScrollIntoView(pItem);
// Selecting the item if asked.
if (pSelect)
{
this.SelectionModel.Select(pItem);
}
return true;
}
return false;
}
