virtual protected void DoItemGUI(Rect rect, int row, TreeViewItem item, bool selected, bool focused, bool useBoldFont)
{
EditorGUIUtility.SetIconSize(new Vector2(k_IconWidth, k_IconWidth)); // If not set we see icons scaling down if text is being cropped
float indent = GetFoldoutIndent(item);
int itemControlID = TreeViewController.GetItemControlID(item);
bool isDropTarget = false;
if (m_TreeView.dragging != null)
{
isDropTarget = m_TreeView.dragging.GetDropTargetControlID() == itemControlID && m_TreeView.data.CanBeParent(item);
}
bool isRenamingThisItem = IsRenaming(item.id);
bool showFoldout = m_TreeView.data.IsExpandable(item);
// Adjust edit field if needed (on repaint since on layout rect.width is invalid when using GUILayout)
if (isRenamingThisItem && Event.current.type == EventType.Repaint)
{
GetRenameOverlay().editFieldRect = GetRenameRect(rect, row, item);
}
string label = item.displayName;
if (isRenamingThisItem)
{
selected = false;
label = "";
}
if (Event.current.type == EventType.Repaint)
{
// Draw background (can be overridden)
DrawItemBackground(rect, row, item, selected, focused);
// Draw selection
if (selected)
{
selectionStyle.Draw(rect, false, false, true, focused);
}
// Draw drop marker
if (isDropTarget)
{
Styles.lineStyle.Draw(GetDropTargetRect(rect), GUIContent.none, true, true, false, false);
}
// Show insertion marker below this item (rendered end of rows)
if (m_TreeView.dragging != null && m_TreeView.dragging.GetRowMarkerControlID() == itemControlID)
{
float yPos = (m_TreeView.dragging.drawRowMarkerAbove ? rect.y : rect.yMax) - insertionStyle.fixedHeight * 0.5f;
m_DraggingInsertionMarkerRect = new Rect(rect.x + indent + extraInsertionMarkerIndent + foldoutStyleWidth + lineStyle.margin.left, yPos, rect.width - indent, rect.height);
}
}
// Do additional ui controls (menu button, prefab arrow etc)
OnAdditionalGUI(rect, row, item, selected, focused);
// Do row content (icon, label, controls etc)
OnContentGUI(rect, row, item, label, selected, focused, useBoldFont, false);
// Do foldout
if (showFoldout)
{
DoFoldout(rect, item, row);
}
EditorGUIUtility.SetIconSize(Vector2.zero);
}
virtual public bool CanBeMultiSelected(TreeViewItem item)
{
return(true);
}
//----------------------------
// Renaming section
virtual public bool IsRenamingItemAllowed(TreeViewItem item)
{
return(true);
}
// This method is called from TreeView and handles:
// - Where the dragged items are dropped (above, below or upon)
// - Auto expansion of collapsed items when hovering over them
// - Setting up the render markers for drop location (horizontal lines)
// 'targetItem' is null when not hovering over any target Item, if so the rest of the arguments are invalid
public virtual bool DragElement(TreeViewItem targetItem, Rect targetItemRect, int row)
{
bool perform = Event.current.type == EventType.DragPerform;
// Are we dragging outside any items
if (targetItem == null)
{
// If so clear any drop markers
if (m_DropData != null)
{
m_DropData.ClearPerEventState();
}
// And let client decide what happens when dragging outside items
DragAndDrop.visualMode = DoDrag(null, null, perform, DropPosition.Below);
if (DragAndDrop.visualMode != DragAndDropVisualMode.None && perform)
{
FinalizeDragPerformed(true);
}
return(false);
}
DropPosition dropPosition;
if (!TryGetDropPosition(targetItem, targetItemRect, row, out dropPosition))
{
return(false);
}
TreeViewItem parentItem = null;
TreeViewItem dropRelativeToItem = targetItem;
bool didChangeTargetToAncector = false;
DropPosition originalDropPosition = dropPosition;
switch (dropPosition)
{
case DropPosition.Upon:
// Parent change: Client must decide what happens when dropping upon: e.g: insert last or first in child list
parentItem = dropRelativeToItem;
break;
case DropPosition.Below:
case DropPosition.Above:
// Sibling change
if (getIndentLevelForMouseCursor != null)
{
int cursorDepth = getIndentLevelForMouseCursor();
HandleSiblingInsertionAtAvailableDepthsAndChangeTargetIfNeeded(ref dropRelativeToItem, row, ref dropPosition, cursorDepth, out didChangeTargetToAncector);
}
else
{
if (dropPosition == DropPosition.Below && m_TreeView.data.IsExpanded(dropRelativeToItem) && dropRelativeToItem.hasChildren)
{
// When hovering between an expanded parent and its first child then make sure we change state to match that
dropPosition = DropPosition.Above;
dropRelativeToItem = dropRelativeToItem.children[0];
}
}
parentItem = dropRelativeToItem.parent;
break;
default:
Debug.LogError("Unhandled enum. Report a bug.");
break;
}
if (perform)
{
DragAndDropVisualMode mode = DragAndDropVisualMode.None;
// Try Drop upon target item
if (dropPosition == DropPosition.Upon)
{
mode = DoDrag(dropRelativeToItem, dropRelativeToItem, true, dropPosition);
}
// Drop between items
if (mode == DragAndDropVisualMode.None && parentItem != null)
{
mode = DoDrag(parentItem, dropRelativeToItem, true, dropPosition);
}
// Finalize drop
if (mode != DragAndDropVisualMode.None)
{
FinalizeDragPerformed(false);
}
else
{
DragCleanup(true);
m_TreeView.NotifyListenersThatDragEnded(null, false);
}
}
else // DragUpdate
{
if (m_DropData == null)
{
m_DropData = new DropData();
}
m_DropData.ClearPerEventState();
// Try drop on top of items
if (dropPosition == DropPosition.Upon)
{
int itemControlID = TreeViewController.GetItemControlID(dropRelativeToItem);
HandleAutoExpansion(itemControlID, dropRelativeToItem, targetItemRect);
var mode = DoDrag(dropRelativeToItem, dropRelativeToItem, false, dropPosition);
if (mode != DragAndDropVisualMode.None)
{
m_DropData.dropTargetControlID = itemControlID;
DragAndDrop.visualMode = mode;
}
}
// Drop between items
else if (dropRelativeToItem != null && parentItem != null)
{
var mode = DoDrag(parentItem, dropRelativeToItem, false, dropPosition);
if (mode != DragAndDropVisualMode.None)
{
drawRowMarkerAbove = dropPosition == DropPosition.Above;
m_DropData.rowMarkerControlID = TreeViewController.GetItemControlID(dropRelativeToItem);
m_DropData.insertionMarkerYPosition = originalDropPosition == DropPosition.Above ? targetItemRect.y : targetItemRect.yMax;
m_DropData.insertRelativeToSibling = dropRelativeToItem;
if (didChangeTargetToAncector)
{
m_DropData.ancestorControlID = TreeViewController.GetItemControlID(dropRelativeToItem);
}
DragAndDrop.visualMode = mode;
}
}
}
Event.current.Use();
return(true);
}
virtual public void SetExpanded(TreeViewItem item, bool expand)
{
SetExpanded(item.id, expand);
}
protected float GetDropBetweenHalfHeight(TreeViewItem item, Rect itemRect)
{
return(m_TreeView.data.CanBeParent(item) ? m_TreeView.gui.halfDropBetweenHeight : itemRect.height * 0.5f);
}
internal void HandleSiblingInsertionAtAvailableDepthsAndChangeTargetIfNeeded(ref TreeViewItem targetItem, int targetItemRow, ref DropPosition dropPosition, int cursorDepth, out bool didChangeTargetToAncestor)
{
if (dropPosition != DropPosition.Above && dropPosition != DropPosition.Below)
{
throw new ArgumentException("Invalid argument: " + dropPosition);
}
didChangeTargetToAncestor = false;
TreeViewItem prevItem, nextItem;
GetPreviousAndNextItemsIgnoringDraggedItems(targetItemRow, dropPosition, out prevItem, out nextItem);
if (prevItem == null)
{
return; // Above first row so keep targetItem
}
bool hoveringBetweenExpandedParentAndFirstChild = prevItem.hasChildren && m_TreeView.data.IsExpanded(prevItem.id);
int minDepth = nextItem != null ? nextItem.depth : 0;
int maxDepth = prevItem.depth + (hoveringBetweenExpandedParentAndFirstChild ? 1 : 0);
// Change targetItem and dropPosition
targetItem = prevItem;
dropPosition = DropPosition.Below;
if (maxDepth <= minDepth)
{
if (hoveringBetweenExpandedParentAndFirstChild)
{
targetItem = prevItem.children[0];
dropPosition = DropPosition.Above;
}
return; // The nextItem is a descendant of previous item so keep targetItem
}
if (cursorDepth >= maxDepth)
{
if (hoveringBetweenExpandedParentAndFirstChild)
{
targetItem = prevItem.children[0];
dropPosition = DropPosition.Above;
}
return; // No need to change targetItem if same or higher depth
}
// Search through parents for a new target that matches the cursor
var target = targetItem;
while (target.depth > minDepth)
{
if (target.depth == cursorDepth)
{
break;
}
target = target.parent;
}
didChangeTargetToAncestor = target != targetItem;
// Change to new targetItem
targetItem = target;
}
private void SelectionByKey(TreeViewItem itemSelected)
{
List <int> newSelection = this.GetNewSelection(itemSelected, false, true);
this.NewSelectionFromUserInteraction(newSelection, itemSelected.id);
}
public void SelectionClick(TreeViewItem itemClicked, bool keepMultiSelection)
{
List <int> newSelection = this.GetNewSelection(itemClicked, keepMultiSelection, false);
this.NewSelectionFromUserInteraction(newSelection, (itemClicked == null) ? 0 : itemClicked.id);
}
// Setup child and parent references based on the depth of the tree view items in 'visibleItems'
internal static void SetChildParentReferences(IList <TreeViewItem> visibleItems, TreeViewItem root)
{
for (int i = 0; i < visibleItems.Count; i++)
{
visibleItems[i].parent = null;
}
// Set child and parent references using depth info
int rootChildCount = 0;
for (int i = 0; i < visibleItems.Count; i++)
{
SetChildParentReferences(i, visibleItems);
if (visibleItems[i].parent == null)
{
rootChildCount++;
}
}
// Ensure items without a parent gets 'root' as parent
if (rootChildCount > 0)
{
var rootChildren = new List <TreeViewItem>(rootChildCount);
for (int i = 0; i < visibleItems.Count; i++)
{
if (visibleItems[i].parent == null)
{
rootChildren.Add(visibleItems[i]);
visibleItems[i].parent = root;
}
}
root.children = rootChildren;
}
else
{
root.children = new List <TreeViewItem>();
}
}
private void KeyboardGUI()
{
if (this.m_KeyboardControlID == GUIUtility.keyboardControl && GUI.enabled)
{
if (this.keyboardInputCallback != null)
{
this.keyboardInputCallback();
}
if (Event.current.type == EventType.KeyDown)
{
KeyCode keyCode = Event.current.keyCode;
switch (keyCode)
{
case KeyCode.KeypadEnter:
goto IL_1EE;
case KeyCode.KeypadEquals:
case KeyCode.Insert:
case KeyCode.F1:
IL_92:
if (keyCode != KeyCode.Return)
{
if (Event.current.keyCode <= KeyCode.A || Event.current.keyCode < KeyCode.Z)
{
}
goto IL_269;
}
goto IL_1EE;
case KeyCode.UpArrow:
Event.current.Use();
this.OffsetSelection(-1);
goto IL_269;
case KeyCode.DownArrow:
Event.current.Use();
this.OffsetSelection(1);
goto IL_269;
case KeyCode.RightArrow:
this.ChangeFolding(this.state.selectedIDs.ToArray(), true);
Event.current.Use();
goto IL_269;
case KeyCode.LeftArrow:
this.ChangeFolding(this.state.selectedIDs.ToArray(), false);
Event.current.Use();
goto IL_269;
case KeyCode.Home:
Event.current.Use();
this.OffsetSelection(-1000000);
goto IL_269;
case KeyCode.End:
Event.current.Use();
this.OffsetSelection(1000000);
goto IL_269;
case KeyCode.PageUp:
{
Event.current.Use();
TreeViewItem treeViewItem = this.data.FindItem(this.state.lastClickedID);
if (treeViewItem != null)
{
int numRowsOnPageUpDown = this.gui.GetNumRowsOnPageUpDown(treeViewItem, true, this.m_TotalRect.height);
this.OffsetSelection(-numRowsOnPageUpDown);
}
goto IL_269;
}
case KeyCode.PageDown:
{
Event.current.Use();
TreeViewItem treeViewItem2 = this.data.FindItem(this.state.lastClickedID);
if (treeViewItem2 != null)
{
int numRowsOnPageUpDown2 = this.gui.GetNumRowsOnPageUpDown(treeViewItem2, true, this.m_TotalRect.height);
this.OffsetSelection(numRowsOnPageUpDown2);
}
goto IL_269;
}
case KeyCode.F2:
if (Application.platform != RuntimePlatform.OSXEditor && this.BeginNameEditing(0f))
{
Event.current.Use();
}
goto IL_269;
}
goto IL_92;
IL_1EE:
if (Application.platform == RuntimePlatform.OSXEditor && this.BeginNameEditing(0f))
{
Event.current.Use();
}
IL_269 :;
}
}
}
virtual public float GetContentIndent(TreeViewItem item)
{
return(GetFoldoutIndent(item) + foldoutStyleWidth + lineStyle.margin.left);
}
virtual public bool BeginRename(TreeViewItem item, float delay)
{
return(GetRenameOverlay().BeginRename(item.displayName, item.id, delay));
}
protected virtual void OnAdditionalGUI(Rect rect, int row, TreeViewItem item, bool selected, bool focused)
{
}
// This method is called from TreeView when a drag is started // Client should setup the drag data public abstract void StartDrag(TreeViewItem draggedItem, List <int> draggedItemIDs);
internal static int GetItemControlID(TreeViewItem item)
{
return(((item == null) ? 0 : item.id) + 10000000);
}
// This method is called from within DragElement when it has determined what is the parent item of the current targetItem
// (This depends on if dropPosition is above, below or upon)
// Implemented by client code to decide what should happen when the drag is e.g performed (e.g change the backend state of the tree view)
// Notes on arguments:
// When hovering outside any items: target and parent is null, dropPos is invalid
// If parentItem and targetItem is the same then insert as first child of parent, dropPos is invalid
// If parentItem and targetItem is different then use dropPos to insert dragged items relative to targetItem
// parentItem can be null when root is visible and hovering above or below the root
// if targetItem is null then parent can be null if root is visible
// if targetitem is null then parent might be valid if root is hidden
public abstract DragAndDropVisualMode DoDrag(TreeViewItem parentItem, TreeViewItem targetItem, bool perform, DropPosition dropPosition);
public void HandleUnusedMouseEventsForItem(Rect rect, TreeViewItem item, int row)
{
int itemControlID = TreeViewController.GetItemControlID(item);
Event current = Event.current;
EventType typeForControl = current.GetTypeForControl(itemControlID);
switch (typeForControl)
{
case EventType.MouseDown:
if (rect.Contains(Event.current.mousePosition))
{
if (Event.current.button == 0)
{
GUIUtility.keyboardControl = this.m_KeyboardControlID;
this.Repaint();
if (Event.current.clickCount == 2)
{
if (this.itemDoubleClickedCallback != null)
{
this.itemDoubleClickedCallback(item.id);
}
}
else
{
List <int> newSelection = this.GetNewSelection(item, true, false);
bool flag = this.dragging != null && newSelection.Count != 0 && this.dragging.CanStartDrag(item, newSelection, Event.current.mousePosition);
if (flag)
{
this.m_DragSelection = newSelection;
DragAndDropDelay dragAndDropDelay = (DragAndDropDelay)GUIUtility.GetStateObject(typeof(DragAndDropDelay), itemControlID);
dragAndDropDelay.mouseDownPosition = Event.current.mousePosition;
}
else
{
this.m_DragSelection.Clear();
if (this.m_AllowRenameOnMouseUp)
{
this.m_AllowRenameOnMouseUp = (this.state.selectedIDs.Count == 1 && this.state.selectedIDs[0] == item.id);
}
this.SelectionClick(item, false);
if (this.itemSingleClickedCallback != null)
{
this.itemSingleClickedCallback(item.id);
}
}
GUIUtility.hotControl = itemControlID;
}
current.Use();
}
else if (Event.current.button == 1)
{
bool keepMultiSelection = true;
this.SelectionClick(item, keepMultiSelection);
}
}
return;
case EventType.MouseUp:
if (GUIUtility.hotControl == itemControlID)
{
bool flag2 = this.m_DragSelection.Count > 0;
GUIUtility.hotControl = 0;
this.m_DragSelection.Clear();
current.Use();
if (rect.Contains(current.mousePosition))
{
Rect renameRect = this.gui.GetRenameRect(rect, row, item);
List <int> selectedIDs = this.state.selectedIDs;
if (this.m_AllowRenameOnMouseUp && selectedIDs != null && selectedIDs.Count == 1 && selectedIDs[0] == item.id && renameRect.Contains(current.mousePosition) && !EditorGUIUtility.HasHolddownKeyModifiers(current))
{
this.BeginNameEditing(0.5f);
}
else if (flag2)
{
this.SelectionClick(item, false);
if (this.itemSingleClickedCallback != null)
{
this.itemSingleClickedCallback(item.id);
}
}
}
}
return;
case EventType.MouseMove:
IL_2C:
if (typeForControl == EventType.DragUpdated || typeForControl == EventType.DragPerform)
{
if (this.dragging != null && this.dragging.DragElement(item, rect, row))
{
GUIUtility.hotControl = 0;
}
return;
}
if (typeForControl != EventType.ContextClick)
{
return;
}
if (rect.Contains(current.mousePosition))
{
if (this.contextClickItemCallback != null)
{
this.contextClickItemCallback(item.id);
}
}
return;
case EventType.MouseDrag:
if (GUIUtility.hotControl == itemControlID && this.dragging != null && this.m_DragSelection.Count > 0)
{
DragAndDropDelay dragAndDropDelay2 = (DragAndDropDelay)GUIUtility.GetStateObject(typeof(DragAndDropDelay), itemControlID);
if (dragAndDropDelay2.CanStartDrag() && this.dragging.CanStartDrag(item, this.m_DragSelection, dragAndDropDelay2.mouseDownPosition))
{
this.dragging.StartDrag(item, this.m_DragSelection);
GUIUtility.hotControl = 0;
}
current.Use();
}
return;
}
goto IL_2C;
}
void GetPreviousAndNextItemsIgnoringDraggedItems(int targetRow, DropPosition dropPosition, out TreeViewItem previousItem, out TreeViewItem nextItem)
{
if (dropPosition != DropPosition.Above && dropPosition != DropPosition.Below)
{
throw new ArgumentException("Invalid argument: " + dropPosition);
}
previousItem = nextItem = null;
int curPrevRow = (dropPosition == DropPosition.Above) ? targetRow - 1 : targetRow;
int curNextRow = (dropPosition == DropPosition.Above) ? targetRow : targetRow + 1;
while (curPrevRow > 0)
{
var curPreviousItem = m_TreeView.data.GetItem(curPrevRow);
if (!m_TreeView.IsDraggingItem(curPreviousItem))
{
previousItem = curPreviousItem;
break;
}
curPrevRow--;
}
while (curNextRow < m_TreeView.data.rowCount)
{
var curNextItem = m_TreeView.data.GetItem(curNextRow);
if (!m_TreeView.IsDraggingItem(curNextItem))
{
nextItem = curNextItem;
break;
}
curNextRow++;
}
}
public bool IsItemDragSelectedOrSelected(TreeViewItem item)
{
return((this.m_DragSelection.Count <= 0) ? this.state.selectedIDs.Contains(item.id) : this.m_DragSelection.Contains(item.id));
}
protected bool TryGetDropPosition(TreeViewItem item, Rect itemRect, int row, out DropPosition dropPosition)
{
Vector2 currentMousePos = Event.current.mousePosition;
if (itemRect.Contains(currentMousePos))
{
float dropBetweenHalfHeight = GetDropBetweenHalfHeight(item, itemRect);
if (currentMousePos.y >= itemRect.yMax - dropBetweenHalfHeight)
{
dropPosition = DropPosition.Below;
}
else if (currentMousePos.y <= itemRect.yMin + dropBetweenHalfHeight)
{
dropPosition = DropPosition.Above;
}
else
{
dropPosition = DropPosition.Upon;
}
return(true);
}
else
{
// Check overlap with next item (if any)
float nextOverlap = m_TreeView.gui.halfDropBetweenHeight;
int nextRow = row + 1;
if (nextRow < m_TreeView.data.rowCount)
{
Rect nextRect = m_TreeView.gui.GetRowRect(nextRow, itemRect.width);
bool nextCanBeParent = m_TreeView.data.CanBeParent(m_TreeView.data.GetItem(nextRow));
if (nextCanBeParent)
{
nextOverlap = m_TreeView.gui.halfDropBetweenHeight;
}
else
{
nextOverlap = nextRect.height * 0.5f;
}
}
Rect nextOverlapRect = itemRect;
nextOverlapRect.y = itemRect.yMax;
nextOverlapRect.height = nextOverlap;
if (nextOverlapRect.Contains(currentMousePos))
{
dropPosition = DropPosition.Below;
return(true);
}
// Check overlap above first item
if (row == 0)
{
Rect overlapUpwards = itemRect;
overlapUpwards.yMin -= m_TreeView.gui.halfDropBetweenHeight;
overlapUpwards.height = m_TreeView.gui.halfDropBetweenHeight;
if (overlapUpwards.Contains(currentMousePos))
{
dropPosition = DropPosition.Above;
return(true);
}
}
}
dropPosition = DropPosition.Below;
return(false);
}
public virtual bool DragElement(TreeViewItem targetItem, Rect targetItemRect, bool firstItem)
{
bool flag = Event.current.type == EventType.DragPerform;
bool result;
if (targetItem == null)
{
if (this.m_DropData != null)
{
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
}
DragAndDrop.visualMode = this.DoDrag(null, null, flag, TreeViewDragging.DropPosition.Below);
if (DragAndDrop.visualMode != DragAndDropVisualMode.None && flag)
{
this.FinalizeDragPerformed(true);
}
result = false;
}
else
{
Vector2 mousePosition = Event.current.mousePosition;
bool flag2 = this.m_TreeView.data.CanBeParent(targetItem);
Rect rect = targetItemRect;
float num = (!flag2) ? (targetItemRect.height * 0.5f) : this.m_TreeView.gui.halfDropBetweenHeight;
if (firstItem)
{
rect.yMin -= num;
}
rect.yMax += num;
if (!rect.Contains(mousePosition))
{
result = false;
}
else
{
TreeViewDragging.DropPosition dropPosition;
if (mousePosition.y >= targetItemRect.yMax - num)
{
dropPosition = TreeViewDragging.DropPosition.Below;
}
else if (firstItem && mousePosition.y <= targetItemRect.yMin + num)
{
dropPosition = TreeViewDragging.DropPosition.Above;
}
else
{
dropPosition = ((!flag2) ? TreeViewDragging.DropPosition.Above : TreeViewDragging.DropPosition.Upon);
}
TreeViewItem treeViewItem = null;
switch (dropPosition)
{
case TreeViewDragging.DropPosition.Upon:
treeViewItem = targetItem;
break;
case TreeViewDragging.DropPosition.Below:
if (this.m_TreeView.data.IsExpanded(targetItem) && targetItem.hasChildren)
{
treeViewItem = targetItem;
targetItem = targetItem.children[0];
dropPosition = TreeViewDragging.DropPosition.Above;
}
else
{
treeViewItem = targetItem.parent;
}
break;
case TreeViewDragging.DropPosition.Above:
treeViewItem = targetItem.parent;
break;
}
DragAndDropVisualMode dragAndDropVisualMode = DragAndDropVisualMode.None;
if (flag)
{
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode == DragAndDropVisualMode.None && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, true, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.FinalizeDragPerformed(false);
}
else
{
this.DragCleanup(true);
this.m_TreeView.NotifyListenersThatDragEnded(null, false);
}
}
else
{
if (this.m_DropData == null)
{
this.m_DropData = new TreeViewDragging.DropData();
}
this.m_DropData.dropTargetControlID = 0;
this.m_DropData.rowMarkerControlID = 0;
int itemControlID = TreeViewController.GetItemControlID(targetItem);
this.HandleAutoExpansion(itemControlID, targetItem, targetItemRect, num, mousePosition);
if (dropPosition == TreeViewDragging.DropPosition.Upon)
{
dragAndDropVisualMode = this.DoDrag(targetItem, targetItem, false, dropPosition);
}
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.m_DropData.dropTargetControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
else if (targetItem != null && treeViewItem != null)
{
dragAndDropVisualMode = this.DoDrag(treeViewItem, targetItem, false, dropPosition);
if (dragAndDropVisualMode != DragAndDropVisualMode.None)
{
this.drawRowMarkerAbove = (dropPosition == TreeViewDragging.DropPosition.Above);
this.m_DropData.rowMarkerControlID = itemControlID;
DragAndDrop.visualMode = dragAndDropVisualMode;
}
}
}
Event.current.Use();
result = true;
}
}
return(result);
}
public virtual bool CanStartDrag(TreeViewItem targetItem, List <int> draggedItemIDs, Vector2 mouseDownPosition)
{
return(true);
}
internal static void SetChildParentReferences(IList <TreeViewItem> visibleItems, TreeViewItem root)
{
for (int i = 0; i < visibleItems.Count; i++)
{
visibleItems[i].parent = null;
}
int num = 0;
for (int j = 0; j < visibleItems.Count; j++)
{
TreeViewUtility.SetChildParentReferences(j, visibleItems);
if (visibleItems[j].parent == null)
{
num++;
}
}
if (num > 0)
{
List <TreeViewItem> list = new List <TreeViewItem>(num);
for (int k = 0; k < visibleItems.Count; k++)
{
if (visibleItems[k].parent == null)
{
list.Add(visibleItems[k]);
visibleItems[k].parent = root;
}
}
root.children = list;
}
else
{
root.children = new List <TreeViewItem>();
}
}
virtual public bool IsExpanded(TreeViewItem item)
{
return(IsExpanded(item.id));
}
internal static TreeViewItem FindItem(int id, TreeViewItem searchFromThisItem)
{
return(TreeViewUtility.FindItemRecursive(id, searchFromThisItem));
}
virtual public bool CanBeParent(TreeViewItem item)
{
return(true);
}
internal static void SetParentAndChildrenForItems(IList <TreeViewItem> rows, TreeViewItem root)
{
TreeViewUtility.SetChildParentReferences(rows, root);
}
public virtual void ReloadData()
{
m_FakeItem = null;
FetchData();
}
protected virtual void DrawItemBackground(Rect rect, int row, TreeViewItem item, bool selected, bool focused)
{
// override for custom rendering of background behind selection and drop effect rendering
}
