internal void EnsureSelectionVisible(EnsureSelectionVisibleAction action)
{
if (_selectedNodes.Count == 0 || action == EnsureSelectionVisibleAction.None)
return;
Boolean ensureSelVisible = false;
if ((action & EnsureSelectionVisibleAction.SelectionChanged) == EnsureSelectionVisibleAction.SelectionChanged)
ensureSelVisible = true;
else if ((action & EnsureSelectionVisibleAction.HierarchyChanged) == EnsureSelectionVisibleAction.HierarchyChanged)
ensureSelVisible = true;
else if ((action & EnsureSelectionVisibleAction.LayerChanged) == EnsureSelectionVisibleAction.LayerChanged)
ensureSelVisible = true;
else if ((action & EnsureSelectionVisibleAction.MaterialChanged) == EnsureSelectionVisibleAction.MaterialChanged)
ensureSelVisible = true;
if (ensureSelVisible)
{
List<TreeNode> selectedTreeNodes = new List<TreeNode>(_selectedNodes.Count);
ExpandPolicy expPolicy = ExpandPolicy.Never;
if (ListMode == OutlinerListMode.Hierarchy)
{
if (AutoExpandHierarchy)
expPolicy = ExpandPolicy.Always;
else
expPolicy = ExpandSelectionPolicyHierarchy;
}
else if (ListMode == OutlinerListMode.Layer)
{
if (AutoExpandLayer)
expPolicy = ExpandPolicy.Always;
else
expPolicy = ExpandSelectionPolicyLayer;
}
else if (ListMode == OutlinerListMode.Material)
{
if (AutoExpandMaterial)
expPolicy = ExpandPolicy.Always;
else
expPolicy = ExpandSelectionPolicyMaterial;
}
_internalExpandCollapse = true;
Boolean shouldExpandSelection = true;
foreach (OutlinerNode n in _selectedNodes)
{
TreeNode tn;
if (_treeNodes.TryGetValue(n, out tn))
{
selectedTreeNodes.Add(tn);
if (expPolicy == ExpandPolicy.WhenNecessary && !hasCollapsedParents(tn))
shouldExpandSelection = false;
else if (expPolicy == ExpandPolicy.Always && hasCollapsedParents(tn))
{
TreeNode p = tn.Parent;
while (p != null)
{
p.Expand();
p = p.Parent;
}
}
}
}
if (expPolicy == ExpandPolicy.WhenNecessary && shouldExpandSelection && selectedTreeNodes.Count > 0)
{
TreeNode tn = selectedTreeNodes[0].Parent;
while (tn != null)
{
tn.Expand();
tn = tn.Parent;
}
}
_internalExpandCollapse = false;
List<Rectangle> treeNodeBounds = new List<Rectangle>(_selectedNodes.Count);
TreeNode highestNode = null;
Int32 highestNodeY = Int32.MaxValue;
foreach (TreeNode tn in selectedTreeNodes)
{
Rectangle bounds = tn.Bounds;
treeNodeBounds.Add(bounds);
if (bounds.Y < highestNodeY && !hasCollapsedParents(tn))
{
highestNode = tn;
highestNodeY = bounds.Y;
}
}
if (highestNode != null)
{
highestNode.EnsureVisible();
TreeNode lowestNode = null;
Int32 lowestNodeY = Int32.MinValue;
for (Int32 i = 0; i < selectedTreeNodes.Count; i++)
{
TreeNode tn = selectedTreeNodes[i];
if (tn != highestNode)
{
Rectangle bounds = treeNodeBounds[i];
if (((bounds.Y + bounds.Height) - highestNodeY) < ClientRectangle.Height && bounds.Y > lowestNodeY && !hasCollapsedParents(tn))
{
lowestNode = tn;
lowestNodeY = bounds.Y;
}
}
}
if (lowestNode != null)
{
lowestNode.EnsureVisible();
}
}
}
}
internal void BeginTimedEnsureSelectionVisible(EnsureSelectionVisibleAction action)
{
_ensureSelectionVisibleAction |= action;
if (!_ensureSelectionVisibleTimer.Enabled)
_ensureSelectionVisibleTimer.Start();
}
void _ensureSelectionVisibleTimer_Tick(object sender, EventArgs e)
{
_ensureSelectionVisibleTimer.Stop();
if (!_sortTimer.Enabled)
{
EnsureSelectionVisible(_ensureSelectionVisibleAction);
_ensureSelectionVisibleAction = EnsureSelectionVisibleAction.None;
}
else
_ensureSelectionVisibleWaitingForSort = true;
}
public TreeView()
{
InitializeComponent();
this.SetStyle(ControlStyles.UserPaint, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
AllowDrop = true;
Scene = new OutlinerScene();
Style = new TreeStyle(this);
Filter = new OutlinerFilter(this);
ListMode = OutlinerListMode.Hierarchy;
IconClickAction = IconClickAction.Hide;
ShowNodeHideButton = true;
InvertNodeHideButton = false;
ShowNodeFreezeButton = true;
ShowNodeBoxModeButton = false;
HighlighLastSelectedObject = false;
AutoExpandHierarchy = false;
AutoExpandLayer = false;
AutoExpandMaterial = false;
ExpandHierarchyKey = Keys.Control;
DragMouseButton = MouseButtons.Middle;
DoubleClickAction = DoubleClickAction.Rename;
_treeNodes = new Dictionary<OutlinerNode, TreeNode>();
_selectedNodes = new HashSet<OutlinerNode>();
_expandedNodeHandles = new HashSet<Int32>();
_treeDragDropHandler = new TreeDragDropHandler(this, Scene);
_updateTimer = new Timer();
_updateTimer.Interval = 40;
_updateTimer.Tick += new EventHandler(updateTimer_Tick);
_sortTimer = new Timer();
_sortTimer.Interval = 60;
_sortTimer.Tick += new EventHandler(sortTimer_Tick);
_updateWaitingForSort = false;
_ensureSelectionVisibleTimer = new Timer();
_ensureSelectionVisibleTimer.Interval = 50;
_ensureSelectionVisibleTimer.Tick += new EventHandler(_ensureSelectionVisibleTimer_Tick);
_ensureSelectionVisibleAction = EnsureSelectionVisibleAction.None;
_ensureSelectionVisibleWaitingForSort = false;
}