private void TreeViewItem_MouseDown(object sender, MouseButtonEventArgs e)
{
var topic = (e.OriginalSource as FrameworkElement)?.DataContext as DocTopic;
if (topic == null)
{
return;
}
if (e.ChangedButton == MouseButton.Left)
{
_lastMouseDownPoint = e.GetPosition(TreeTopicBrowser);
}
if (!HandleSelection(topic))
{
return;
}
if (TreeTopicBrowser.SelectedItem is DocTopic)
{
TreeViewItem tvi = e.OriginalSource as TreeViewItem;
tvi?.BringIntoView();
}
}
private void TreeTopicBrowser_Selected(object sender, RoutedEventArgs e)
{
e.Handled = true; // don't bubble up through parents
var topic = TreeTopicBrowser.SelectedItem as DocTopic;
if (topic != null)
{
SelectedTopic = topic;
TreeViewItem tvi = e.OriginalSource as TreeViewItem;
tvi?.BringIntoView();
}
}
private void TreeViewItem_Selected(object sender, RoutedEventArgs e)
{
if (sender is TreeViewItem)
{
tviSelected = sender as TreeViewItem;
if (tviSelected != null)
{
SelectedFile = tviSelected.DataContext as FileContainer;
tviSelected.BringIntoView();
}
e.Handled = true;
}
else
{
tviSelected = null;
}
}
private void Select(TreeViewItem element)
{
if (element.IsSelected)
{
return;
}
element.IsSelected = true;
_lastSelectedItem = element;
SelectedTreeViewItems.Add(element);
element.BringIntoView();
if (AutoExpandSelected)
{
TryExpandTree(element);
}
}
void CollapseTargetNode(TreeViewItem tvi, object NodeName)
{
if (tvi.Header.ToString() == NodeName.ToString())
{
tvi.IsExpanded = false;
tvi.BringIntoView();
return;
}
if (tvi.HasItems)
{
foreach (var item in tvi.Items)
{
TreeViewItem temp = item as TreeViewItem;
CollapseTargetNode(temp, NodeName);
}
}
}
static void OnTreeViewItemSelected(object sender, RoutedEventArgs e)
{
// Only react to the Selected event raised by the TreeViewItem
// whose IsSelected property was modified. Ignore all ancestors
// who are merely reporting that a descendant's Selected fired.
if (!Object.ReferenceEquals(sender, e.OriginalSource))
{
return;
}
TreeViewItem item = e.OriginalSource as TreeViewItem;
if (item != null)
{
item.BringIntoView();
}
}
static void OnTreeViewItemSelected(object sender, RoutedEventArgs e)
{
// Only react to the Selected event raised by the TreeViewItem
// whose IsSelected property was modified. Ignore all ancestors
// who are merely reporting that a descendant's Selected fired.
if (!Object.ReferenceEquals(sender, e.OriginalSource))
{
return;
}
TreeViewItem item = e.OriginalSource as TreeViewItem;
if (item != null)
{
item.BringIntoView();
}
//item.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Loaded, new DispatcherOperationCallback(ScrollItemIntoView), item);
}
/// <summary>
/// Initializes the "system definition" tree.
/// </summary>
private void LoadSystemDefSet()
{
string prevSelSystem = AppSettings.Global.GetString(AppSettings.NEWP_SELECTED_SYSTEM,
"[nothing!selected]");
TreeViewItem selItem = PopulateNodes(prevSelSystem);
if (selItem != null)
{
selItem.IsSelected = true;
selItem.BringIntoView();
}
targetSystemTree.Focus();
Debug.WriteLine("selected is " + targetSystemTree.SelectedItem);
}
/// <summary>
/// Ensures that a node for a given item (and all its
/// ancestors) has been created and selects it immediately.<br/>
/// This method basically expands all ancestors of the submitted
/// <paramref name="item"/> which makes sure the node
/// will be available.
/// </summary>
/// <param name="item">The item that should be represented
/// by an existing tree node.</param>
/// <exception cref="InvalidOperationException">If the item's
/// ancestor list does not lead back to the root items because
/// the item does not belong to the tree, or the tree's rendered
/// nodes and bound data are out of sync.</exception>
protected void SelectItemNode(T item)
{
string itemKey = GetItemKey(item);
//make sure all of the item's ancestors which will be expanded
//-> this ensures the item will be visible on the tree when
//we render it.
List <T> parentList = GetParentItemList(item);
ItemCollection items = RootNode == null ? Tree.Items : RootNode.Items;
foreach (T parent in parentList)
{
string parentKey = GetItemKey(parent);
//expand the parent node, than move a level lower
TreeViewItem parentNode = TryFindItemNode(items, parentKey, false);
//if we don't find the parent, the tree's nodes are not up-to-date
//which means we should probably refresh - write to debug output...
if (parentNode == null)
{
string msg = "Cannot create a tree node for item {0} as its parent item {1} is not part of the tree's hierarchy. This is a strong indicator that data and the UI structure are out of sync.";
msg = String.Format(msg, itemKey, parentKey);
throw new InvalidOperationException(msg);
}
parentNode.IsExpanded = true;
items = parentNode.Items;
}
//all ancestor nodes are expanded - now select the node
TreeViewItem itemNode = TryFindItemNode(items, itemKey, false);
if (itemNode == null)
{
//this could be the case if we received a root item, but the
//tree's Items collection does not contain it.
string msg = "Cannot select item '{0}' - the item does not exist in the hierarchy of the tree's bound items.";
msg = String.Format(msg, itemKey);
throw new InvalidOperationException(msg);
}
itemNode.IsSelected = true;
itemNode.BringIntoView();
}
public void SelectItemNamed(string name)
{
foreach (object o in objectTree.Items)
{
if (o is TypeInfo)
{
if (((TypeInfo)o).Name.ToLower().Equals(name.ToLower()))
{
TreeViewItem titem = ((TreeViewItem)objectTree.ItemContainerGenerator.ContainerFromItem(o));
if (titem != null)
{
titem.BringIntoView();
titem.IsSelected = true;
return;
}
}
}
else if (o is PropInfo)
{
if (((PropInfo)o).Name.ToLower().Equals(name.ToLower()))
{
TreeViewItem titem = ((TreeViewItem)objectTree.ItemContainerGenerator.ContainerFromItem(o));
if (titem != null)
{
titem.BringIntoView();
titem.IsSelected = true;
return;
}
}
}
else if (o is FunctionInfo)
{
if (((FunctionInfo)o).Name.ToLower().Equals(name.ToLower()))
{
TreeViewItem titem = ((TreeViewItem)objectTree.ItemContainerGenerator.ContainerFromItem(o));
if (titem != null)
{
titem.BringIntoView();
titem.IsSelected = true;
return;
}
}
}
}
}
private void selectChannel(int channelId)
{
foreach (GroupDTO group in tvGroups.Items)
{
TreeViewItem groupItem = tvGroups.ItemContainerGenerator.ContainerFromItem(group) as TreeViewItem;
groupItem.BringIntoView();
foreach (ChannelDTO channel in groupItem.Items)
{
if (channel.Id == channelId)
{
TreeViewItem channelItem = groupItem.ItemContainerGenerator.ContainerFromItem(channel) as TreeViewItem;
channelItem.Focus();
return;
}
}
}
}
/// <summary>
/// 选中itemsControl下的item节点
/// </summary>
/// <param name="itemsControl"></param>
/// <param name="item"></param>
/// <returns></returns>
private bool SelectTreeViewItem(ItemsControl itemsControl, object item)
{
if (itemsControl.ItemsSource == null)
{
return(false);
}
if (m_founded)
{
return(true);
}
TreeViewItem currentTreeViewItem = (TreeViewItem)itemsControl.ItemContainerGenerator.ContainerFromItem(item);
if (currentTreeViewItem != null)
{
m_founded = true;
//(m_container as TreeView).CollapseAll();//折叠因查找item而展开的所有项
currentTreeViewItem.BringIntoView();
return(true);
}
foreach (object treeItem in itemsControl.ItemsSource)
{
currentTreeViewItem = (TreeViewItem)itemsControl.ItemContainerGenerator.ContainerFromItem(treeItem);
if (currentTreeViewItem == null)//未显示的项的TreeViewItem为null
{
continue;
}
if (currentTreeViewItem.ItemsSource == null)
{
continue;
}
currentTreeViewItem.IsExpanded = true;//展开
WaitForPriority(DispatcherPriority.Background);
ItemContainerGenerator itemContainerGenerator = currentTreeViewItem.ItemContainerGenerator;
if (itemContainerGenerator.Status == GeneratorStatus.ContainersGenerated)
{
if (SelectTreeViewItem(currentTreeViewItem, item))
{
return(true);
}
}
}
return(false);
}
static void OnBringIntoViewWhenSelectedChanged(DependencyObject depObj, DependencyPropertyChangedEventArgs e)
{
TreeViewItem item = depObj as TreeViewItem;
if (item == null)
{
return;
}
if (e.NewValue is bool == false)
{
return;
}
if ((bool)e.NewValue)
{
item.BringIntoView();
}
}
private void DataGridMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
DataGridRow row = MainWindow.GetParent <DataGridRow>((DependencyObject)e.OriginalSource);
if (row != null)
{
DataGrid dataGrid = (DataGrid)sender;
FileSystemItem item = (FileSystemItem)dataGrid.SelectedItem;
if (item is Folder)
{
_selectedTreeViewItem.IsExpanded = true;
_selectedTreeViewItem.UpdateLayout();
_selectedTreeViewItem = (TreeViewItem)_selectedTreeViewItem.ItemContainerGenerator.ContainerFromItem(item);
_selectedTreeViewItem.IsSelected = true;
_selectedTreeViewItem.BringIntoView();
}
}
}
private static bool SelectItem(object o, TreeViewItem parentItem)
{
if (parentItem == null)
{
return(false);
}
bool isExpanded = parentItem.IsExpanded;
if (!isExpanded)
{
parentItem.IsExpanded = true;
parentItem.UpdateLayout();
}
TreeViewItem item = parentItem.ItemContainerGenerator.ContainerFromItem(o) as TreeViewItem;
if (item != null)
{
item.IsSelected = true;
item.BringIntoView(new Rect(new Size(50, 100)));
return(true);
}
bool wasFound = false;
for (int i = 0; i < parentItem.Items.Count; i++)
{
TreeViewItem itm = parentItem.ItemContainerGenerator.ContainerFromIndex(i) as TreeViewItem;
var found = SelectItem(o, itm);
if (!found)
{
itm.IsExpanded = false;
}
else
{
wasFound = true;
}
}
return(wasFound);
}
/// <summary>
/// Selects the first node in the tree view returns true if the
/// selection was successful or false if this needs to be called
/// again when the base.ItemContainerGenerator.StatusChanged event
/// is fired. Note if false is returned the same items control (which
/// will be modified as it'a a ref) needs to be passed in next time
/// to complete the selection.
/// </summary>
/// <returns></returns>
internal static bool SelectItemByPath(ref ItemsControl itemsControl, IList itemToSelectByPath)
{
IList source = itemsControl.ItemsSource as IList;
if (source == null || itemToSelectByPath.Count < 1)
{
itemToSelectByPath.Clear();
return(true);
}
if (!source.Contains(itemToSelectByPath[0]))
{
itemToSelectByPath.Clear();
return(true);
}
if (itemsControl.HasItems)
{
// Check that the items container generator has been started.
// If so then just select the item, if not then return false;
TreeViewItem item = itemsControl.ItemContainerGenerator.ContainerFromItem(itemToSelectByPath[0]) as TreeViewItem;
if (item != null)
{
if (itemToSelectByPath.Count == 1)
{
itemToSelectByPath.RemoveAt(0);
item.IsSelected = true;
item.BringIntoView();
return(true);
}
else
{
itemToSelectByPath.RemoveAt(0);
item.IsExpanded = true;
itemsControl = item;
return(SelectItemByPath(ref itemsControl, itemToSelectByPath));
}
}
}
return(false);
}
private static bool ShowSelectedThing(ItemsControl parentContainer, GitComment objectToFind)
{
if (objectToFind == null)
{
return(false);
}
// check current level of tree
foreach (ICommentTree item in parentContainer.Items)
{
TreeViewItem currentContainer = (TreeViewItem)parentContainer.ItemContainerGenerator.ContainerFromItem(item);
if ((currentContainer != null) && (item.Comment.Id == objectToFind.Id))
{
currentContainer.BringIntoView();
return(true);
}
}
// item is not found at current level, check the kids
foreach (ICommentTree item in parentContainer.Items)
{
TreeViewItem currentContainer = (TreeViewItem)parentContainer.ItemContainerGenerator.ContainerFromItem(item);
if ((currentContainer != null) && (currentContainer.Items.Count > 0))
{
// Have to expand the currentContainer or you can't look at the children
currentContainer.IsExpanded = true;
currentContainer.UpdateLayout();
if (!ShowSelectedThing(currentContainer, objectToFind))
{
// Haven't found the thing, so collapse it back
currentContainer.IsExpanded = false;
}
else
{
// We found the thing
return(true);
}
}
}
// default
return(false);
}
private void TreeViewElem_RequestBringIntoView(object sender, RequestBringIntoViewEventArgs e)
{
// Alternative (1): not working completely properly
#if __not_working_completely_properly
Alternative 1
base.BringIntoView();
var scrollViewer = treeViewInner.Template.FindName("_tv_scrollviewer_", treeViewInner) as ScrollViewer;
if (scrollViewer != null)
{
Dispatcher.BeginInvoke(
System.Windows.Threading.DispatcherPriority.Loaded,
(Action)(() => scrollViewer.ScrollToLeftEnd()));
}
* /
#endif
// Alternative (2): seems working fine
// Ignore re-entrant calls
if (mSuppressRequestBringIntoView)
{
return;
}
// Cancel the current scroll attempt
e.Handled = true;
// Call BringIntoView using a rectangle that extends into "negative space" to the left of our
// actual control. This allows the vertical scrolling behaviour to operate without adversely
// affecting the current horizontal scroll position.
mSuppressRequestBringIntoView = true;
TreeViewItem tvi = sender as TreeViewItem;
if (tvi != null)
{
Rect newTargetRect = new Rect(-1000, 0, tvi.ActualWidth + 1000, tvi.ActualHeight);
tvi.BringIntoView(newTargetRect);
}
mSuppressRequestBringIntoView = false;
}
public void FindTextInTree(string text, int searchType)
{
if (!((MainViewModel)DataContext).FindText(text, searchType))
{
MessageBox.Show("Search text not found.", "No Matches", MessageBoxButton.OK, MessageBoxImage.Information);
}
else if (((MainViewModel)DataContext).CurrentIdeaNote != null)
{
Application.Current.MainWindow.Activate();
Stack <IdeaNote> stack = ((MainViewModel)DataContext).CurrentIdeaNote.GetRootToChildStack();
TreeViewItem item = GetTreeViewItemFromIdeaNote(noteTreeView, stack);
if (item != null)
{
item.BringIntoView();
if (((MainViewModel)DataContext).CurrentIdeaNote.IdeaNoteType == nameof(TextNote))
{
FindText(text, 0, false);
}
}
}
}
private void RunningMapTreeViewSelectedItemChanged(object sender, RoutedPropertyChangedEventArgs <object> e)
{
try {
if (sender == e.OriginalSource && e.NewValue != null && !object.ReferenceEquals(e.OldValue, e.NewValue))
{
CircuitMap map = e.NewValue as CircuitMap;
if (map != null)
{
TreeViewItem item = this.Container((TreeView)sender, map);
if (item != null)
{
item.IsExpanded = true;
item.BringIntoView();
}
}
}
} catch (Exception exception) {
Tracer.Report("MainFrame.RunningMapTreeViewSelectedItemChanged", exception);
this.ReportException(exception);
}
}
void JumpToNode(TreeViewItem tvi, string NodeName)
{
if (tvi.Tag.ToString() == NodeName)
{
tvi.IsExpanded = true;
tvi.BringIntoView();
return;
}
else
{
tvi.IsExpanded = false;
}
if (tvi.HasItems)
{
foreach (var item in tvi.Items)
{
TreeViewItem temp = item as TreeViewItem;
JumpToNode(temp, NodeName);
}
}
}
public void ExpandNext()
{
continueWithNextItem:
var item = _items[_next];
_next++;
var childNode = _parentGenerator.ContainerFromItem(item) as TreeViewItem;
if (childNode != null)
{
var generator = childNode.ItemContainerGenerator;
_parentGenerator = generator;
_lastItem = childNode;
if (_next >= _items.Length)
{
_lastItem.IsSelected = true;
_lastItem.BringIntoView();
if (_expandLastItem)
{
_lastItem.IsExpanded = true;
}
return;
}
if (generator.Status == GeneratorStatus.ContainersGenerated)
{
childNode.IsExpanded = true;
goto continueWithNextItem;
}
generator.StatusChanged += ItemContainerGeneratorStatusChanged;
childNode.IsExpanded = true;
}
}
private void NewCustomItem_Click(object sender, RoutedEventArgs e)
{
SlotType slot = SlotType.None;
if (tvItems.SelectedItem != null)
{
slot = (SlotType)(tvItems.SelectedItem as TreeViewItem).Tag;
}
else
{
if (!GetSlot(SlotType.None, null, out slot))
{
return;
}
}
if (slot == SlotType.None)
{
return;
}
CustomItemContainer cic = new CustomItemContainer {
Name = "<Custom Item>"
};
cic.Item = new DDOItemData(ItemDataSource.Custom, false)
{
Name = cic.Name, Slot = slot
};
cic.Item.AddProperty("Minimum Level", null, 1, null);
AddSlotSpecificProperties(cic.Item);
CustomItemsManager.CustomItems.Add(cic);
TreeViewItem tvi = AddItemToTreeView(cic);
tvi.BringIntoView();
tvi.IsSelected = true;
}
/// <summary>
/// Get the TreeViewItems (containers) and let the InspectorTreeNodes
/// know where they are.
/// </summary>
void ItemContainerGenerator1_StatusChanged(object sender, EventArgs e)
{
if (Window.TreeView1.ItemContainerGenerator.Status == GeneratorStatus.ContainersGenerated)
{
foreach (var obj in Window.TreeView1.Items)
{
InspectorNode o = (InspectorNode)obj;
if (o.UIContainer == null || (o.UIContainer != null && o.UIContainer.Header != null && o.UIContainer.Header.ToString().Equals("{DisconnectedItem}")))
{
TreeViewItem item = Window.TreeView1.ItemContainerGenerator.ContainerFromItem(o) as TreeViewItem;
o.UIContainer = item;
// If we're in the Modified only view, expand everything.
if (Config.ModifiedOnly && o.UIContainer != null)
{
o.UIContainer.IsExpanded = true;
}
// If this item didn't have a UIContainer is because it
// is new, expand it. TODO: This line used to expand every
// root node, but it makes the inspector really slow to appear.
// This should be configurable.
//o.Expand();
// item could be null if we're filtering the collection (there's an item but is not being show).
if (InspectedObjects.Count > 2 && item != null)
{
if (o.AutoExpand)
{
((TreeViewItem)o.UIContainer).IsExpanded = true;
}
item.IsSelected = true;
item.BringIntoView();
}
}
}
}
}
internal VideoFile SelectFile(string fileName)
{
VideoFile v = null;
foreach (VideoGroup group in treeFiles.Items)
{
var tvi = treeFiles.ItemContainerGenerator.ContainerFromItem(group) as TreeViewItem;
foreach (VideoFile videoFile in tvi.Items)
{
TreeViewItem childItem = tvi.ItemContainerGenerator.ContainerFromItem(videoFile) as TreeViewItem;
if (childItem != null)
{
childItem.IsSelected = (string.Compare(fileName, videoFile.FileName, true) == 0);
if (childItem.IsSelected)
{
v = videoFile;
childItem.BringIntoView();
}
}
}
}
return(v);
}
static void OnTreeViewItemSelected(object sender, RoutedEventArgs e)
{
// Only react to the Selected event raised by the TreeViewItem
// whose IsSelected property was modified. Ignore all ancestors
// who are merely reporting that a descendant's Selected fired.
if (!Object.ReferenceEquals(sender, e.OriginalSource))
{
return;
}
TreeViewItem item = e.OriginalSource as TreeViewItem;
ViewModelMain vmMain = ServiceLocator.Current.GetInstance <ViewModelMain>();
//SideMenuVM sideMenuVM = sender as SideMenuVM;
//Debug.WriteLine("ccccccccccccccccccccccccccccccccccccccccccccccccccc. node index == " + sideMenuVM.Index.ToString());
Debug.WriteLine("ccccccccccccccccccccccccccccccccccccccccccccccccccc. sender == " + sender.ToString());
if (item != null)
{
item.BringIntoView();
}
}
/*
* 将新添加的页面加入到页面树中
*/
private void insertToTree(ItemsControl itemsControl, StorageImageFolder folder)
{
foreach (TreeViewItem item in itemsControl.Items)
{
Int32 folderId = (Int32)item.Tag;
if (parentId == folderId)
{
TreeViewItem newItem = new TreeViewItem();
newItem.Header = folder.name;
newItem.Tag = folder.id;
newItem.Padding = new Thickness(5);
// newItem.Foreground = Brushes.White;
item.Items.Add(newItem);
newItem.BringIntoView();
break;
}
else
{
insertToTree(item, folder);
}
}
}
//15Jan2015
private bool BringLastVisibleLeafIntoView(TreeViewItem t)
{
bool found = false;
if (t.Tag == null && t.Items.Count > 0)// non leaf node
{
int childcount = t.Items.Count;
int indexoflastchild = childcount - 1;//zero based index
do
{
if (indexoflastchild >= 0)
{
found = BringLastVisibleLeafIntoView(t.Items.GetItemAt(indexoflastchild) as TreeViewItem);
indexoflastchild--;
}
else
{
break;
}
} while (!found);
}
else //leaf node
{
if ((t.Tag as IAUControl).BSkyControlVisibility == System.Windows.Visibility.Visible)//leaf is set to visible
{
(t.Tag as FrameworkElement).BringIntoView();
t.BringIntoView(); //scroll left tree to latest item in tree.(deepest child node at lowest level)
found = true; //leaf found and set for scroll into view.
}
else
{
found = false;
return(found);
}
}
return(found);
}
/// <summary>
/// Attempts to select a specific node in a TreeView, by recursively drilling down to the item indicated by the specified
/// trail.
/// </summary>
/// <param name="control">The control.</param>
/// <param name="trail">The trail.</param>
/// <param name="index">The index.</param>
public static void SelectItem(ItemsControl control, IList trail, int index)
{
object currentItem = trail[index];
// If the control has not generated it's containers, then we need to delay our call until it does.
if (control.ItemContainerGenerator.Status == GeneratorStatus.ContainersGenerated)
{
// Find the current item in the control's Items
foreach (object item in control.Items)
{
if (item == currentItem)
{
TreeViewItem container = (TreeViewItem)control.ItemContainerGenerator.ContainerFromItem(item);
if (++index < trail.Count)
{
// We have more items to drill down into, so use a recursive call with a new control and index
container.IsExpanded = true;
SelectItem(container, trail, index);
}
else
{
// We found the item, so select it and bring it into view
container.IsSelected = true;
container.BringIntoView();
}
break;
}
}
}
else
{
control.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, (DispatcherOperationCallback) delegate(object arg) {
SelectItem(control, trail, index);
return(null);
}, null);
}
}
public bool TrySelectTreeNode(object correspondingUIElementInUserApplication)
{
bool wasFullyExpanded = _hasBeenFullyExpanded;
// First, we need to expand all the nodes so that the "item generators" can be called (which creates the TreeViewItems") and so we can select the node:
ExpandAllNodes();
// Then, select the item:
foreach (Tuple <TreeNode, TreeViewItem> treeNodeAndTreeViewItem in TraverseTreeViewItems(TreeViewForXamlInspection))
{
TreeNode treeNode = treeNodeAndTreeViewItem.Item1;
TreeViewItem treeViewItem = treeNodeAndTreeViewItem.Item2;
if (treeNodeAndTreeViewItem.Item1.Element == correspondingUIElementInUserApplication)
{
if (treeViewItem != null)
{
Dispatcher.BeginInvoke((Action)(async() =>
{
treeViewItem.IsSelected = true;
if (!wasFullyExpanded)
{
await Task.Delay(3000); // We give the time to the TreeView to expand, in ordero to make it possible to bring the selected item into view.
}
treeViewItem.BringIntoView();
}));
}
else
{
throw new Exception("Unable to get the TreeViewItem from the TreeNode. Please inform the authors at: [email protected]");
}
return(true);
}
}
return(false);
}