private ScrollBar GetVerticalScrollBar()
{
// wire up events for the scrollbar
var explorerTreeView = ExplorerTreeView;
var scrollBar = (explorerTreeView == null ? null : ExplorerUtility.FindFirstVerticalScrollBar(explorerTreeView));
// Is cached scrollbar the same as the one in the visual tree?
if (!ReferenceEquals(_vScrollBar, scrollBar))
{
if (_vScrollBar != null)
{
UnhookScrollBarEvents(_vScrollBar);
_vScrollBar = null;
_scrollViewer = null;
}
// wire up events for the scrollbar
_vScrollBar = scrollBar;
if (_vScrollBar != null)
{
_vScrollBar.SizeChanged += VScrollBar_SizeChanged;
_vScrollBar.IsVisibleChanged += VScrollBar_IsVisibleChanged;
_vScrollBar.Unloaded += VScrollBar_Unloaded;
}
}
return(_vScrollBar);
}
internal void OnDropDownLoaded(object sender, RoutedEventArgs e)
{
var searchTextBox = ExplorerUtility.GetTypeDescendents(SearchBox, typeof(TextBox)).FirstOrDefault() as TextBox;
if (searchTextBox != null)
{
searchTextBox.MaxLength = 1000;
}
}
private ExplorerFrame GetExplorerFrame()
{
if (_explorerFrame == null)
{
_explorerFrame = ExplorerUtility.FindLogicalAncestorOfType <ExplorerFrame>(this);
}
return(_explorerFrame);
}
internal void OnMouseDownAncestorOfSearchResultItemStyle(object sender)
{
var treeViewItem = ExplorerUtility.FindVisualAncestorOfType <ExplorerTreeViewItem>(sender as FrameworkElement);
Debug.Assert(treeViewItem != null);
if (treeViewItem != null)
{
FocusTreeViewItem(treeViewItem);
WaitUIUpdate();
UpdateNextAndPreviousResults(true);
WaitUIUpdate();
OnSelectNextSearchResult();
}
}
public void ExecutePutInRenameMode()
{
var selectedExplorerEFElement = GetSelectedExplorerEFElement();
if (selectedExplorerEFElement != null)
{
var treeViewItem = GetTreeViewItem(selectedExplorerEFElement, false);
if (treeViewItem != null)
{
var editableContentControl =
ExplorerUtility.GetTypeDescendents(treeViewItem, typeof(EditableContentControl)).FirstOrDefault() as
EditableContentControl;
if (editableContentControl != null)
{
// put the EditableContentControl into edit mode so user can change the name
editableContentControl.IsInEditMode = true;
}
}
}
}
internal void PutElementInRenameMode(ExplorerEFElement explorerElement)
{
Debug.Assert(explorerElement != null, "explorerElement must not be null");
if (explorerElement != null)
{
// if ExplorerElement.IsEditableInline is false then there will be no EditableContentControl to find
Debug.Assert(
explorerElement.IsEditableInline,
"explorerElement.IsEditableInline should be true but was false. ExplorerElement has name " + explorerElement.Name
+ " and type " + explorerElement.GetType().FullName);
if (explorerElement.IsEditableInline)
{
var treeViewItem = GetTreeViewItem(explorerElement, false);
Debug.Assert(treeViewItem != null, "Could not find TreeViewItem for Explorer element named " + explorerElement.Name);
if (treeViewItem != null)
{
// Note: if the ItemContainerGenerator status is NotStarted, the UI Element is not created yet.
// This causes ExplorerUtility.GetTypeDescendents() call to return null.
if (treeViewItem.ItemContainerGenerator.Status == GeneratorStatus.NotStarted)
{
treeViewItem.UpdateLayout();
}
var editableContentControl =
ExplorerUtility.GetTypeDescendents(treeViewItem, typeof(EditableContentControl)).FirstOrDefault() as
EditableContentControl;
Debug.Assert(
null != editableContentControl,
"Could not find EditableContentControl for Explorer element named " + explorerElement.Name);
if (null != editableContentControl)
{
// put the EditableContentControl into edit mode so user can change the name
editableContentControl.IsInEditMode = true;
}
}
}
}
}
internal void ScrollToMakeVisible(ExplorerTreeViewItem treeViewItem)
{
if (null == treeViewItem)
{
Debug.Assert(false, "ScrollToMakeVisible: should not be passed null ExplorerTreeViewItem");
return;
}
// select item and scroll so that it is visible
treeViewItem.IsSelected = true;
if (ScrollViewer != null)
{
var y = GetY(treeViewItem);
var viewPortHeight = ScrollViewer.ViewportHeight;
if (Math.Abs(ScrollViewer.VerticalOffset + viewPortHeight / 2 - y) > viewPortHeight / 2)
{
// bring to view and center vertically
ScrollViewer.ScrollToVerticalOffset(y - viewPortHeight / 2);
}
var partHeader = ExplorerUtility.GetTreeViewItemPartHeader(treeViewItem);
if (partHeader != null)
{
// bring to view horizontally and maximize visible width
var x = partHeader.TranslatePoint(new Point(0, 0), ExplorerTreeRoot).X;
var width = partHeader.DesiredSize.Width;
var viewPortWidth = ScrollViewer.ViewportWidth;
var horizontalOffset = ScrollViewer.HorizontalOffset;
if ((horizontalOffset > x) ||
((x + width) > (horizontalOffset + viewPortWidth)))
{
ScrollViewer.ScrollToHorizontalOffset(x);
}
}
}
}
private static ExplorerFrame GetExplorerFrame(FrameworkElement element)
{
return(ExplorerUtility.FindVisualAncestorOfType <ExplorerFrame>(element));
}
