private bool SetFocusedItem(TreeNode node, bool bSelect, TreeNode oldNode, TreeViewAction action)
{
CMSTreeViewCancelEventArgs e = new CMSTreeViewCancelEventArgs(node, false, bSelect, action);
OnBeforeSelect(e);
if (e.Cancel)
{
return(false);
}
// temporary disable OnXXXSelect events
this.bEnableSelectEvents = false;
IntPtr hItem = SetFocusedItem(node);
if (bSelect)
{
AddSelectedItem(node);
}
else
{
RemoveSelectedItem(node);
}
SetSelectedState(node, bSelect);
// enable OnXXXSelect events
this.bEnableSelectEvents = true;
OnAfterSelect(new CMSTreeViewEventArgs(node, bSelect, action));
return(true);
}
// Constructor.
public TreeViewCancelEventArgs
(TreeNode node, bool cancel, TreeViewAction action)
: base(cancel)
{
this.node = node;
this.action = action;
}
public void Ctor_TreeNode_TreeViewAction(TreeNode node, TreeViewAction action)
{
var e = new TreeViewEventArgs(node, action);
Assert.Equal(node, e.Node);
Assert.Equal(action, e.Action);
}
public bool SelectNode(TreeNode node, bool select, TreeViewAction action)
{
if (node == null || IsNodeSelected(node) == select)
{
return(false);
}
TreeViewCancelEventArgs ce = new TreeViewCancelEventArgs(node, false, action);
SuspendBeforeSelect = true;
OnBeforeSelect(ce);
SuspendBeforeSelect = false;
if (ce.Cancel)
{
return(false);
}
if (select)
{
node.EnsureVisible();
SelectedNodes.Add(node);
}
else
{
SelectedNodes.Remove(node);
}
OnAfterSelect(new TreeViewEventArgs(node, action));
return(true);
}
/// <summary>
/// Toggles the tri state check.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
private void ToggleTriStateCheck(
TreeNode node,
TreeViewAction action)
{
if (node.StateImageIndex == TriStateUncheckedStateImageIndex)
{
SetTriStateToNode(
node,
action,
TriStateCheckedStateImageIndex,
true);
}
else if (node.StateImageIndex == TriStateIndeterminateStateImageIndex &&
indeterminateToChecked)
{
SetTriStateToNode(
node,
action,
TriStateCheckedStateImageIndex,
true);
}
else
{
SetTriStateToNode(
node,
action,
TriStateUncheckedStateImageIndex,
true);
}
}
private void ClearSelectedNodes(TreeViewAction action)
{
for (int i = SelectedNodes.Count - 1; i >= 0; i--)
{
SelectNode(SelectedNodes[i], false, action);
}
}
// Constructor.
public TreeViewCancelEventArgs
(TreeNode node, bool cancel, TreeViewAction action)
: base(cancel)
{
this.node = node;
this.action = action;
}
private void SelectTo(TreeNode node, TreeViewAction action)
{
if (LastSelectedNode == null)
{
SelectNode(node, true, action);
}
else if (LastSelectedNode == node)
{
SelectNode(node, false, action);
}
else
{
TreeNode nodeBegin = LastSelectedNode;
TreeNode tn = nodeBegin;
while ((tn != null) && (tn != node))
{
if (nodeBegin.Bounds.Y > node.Bounds.Y)
{
tn = tn.PrevVisibleNode;
}
else
{
tn = tn.NextVisibleNode;
}
if (tn != null)
{
SelectNode(tn, true, action);
}
}
}
}
public void Ctor_TreeNode_Bool_TreeViewAction(TreeNode node, bool cancel, TreeViewAction action)
{
var e = new TreeViewCancelEventArgs(node, cancel, action);
Assert.Equal(node, e.Node);
Assert.Equal(cancel, e.Cancel);
Assert.Equal(action, e.Action);
}
public static void TreeView_AfterSelect(TreeViewAction action, TreeNode node)
{
// 通过鼠标或者键盘触发事件，防止修改节点的Checked状态时候再次进入
if ((action == TreeViewAction.ByMouse || action == TreeViewAction.ByKeyboard) && node.Checked)
{
LogHelper.Log("select node " + node.Text + " tag " + node.Tag + " key " + OPCDAViewHelper.Key(node.FullPath.ToString()));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TreeViewTriStateEventArgs"/> class.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="stateImageIndex">Index of the state image.</param>
public TreeViewTriStateEventArgs(
TreeNode node,
TreeViewAction action,
int stateImageIndex)
:
base(node, action)
{
this.stateImageIndex = stateImageIndex;
}
private void UnselectNodesRecursively(MultiSelectTreeNode tn, TreeViewAction tva)
{
SelectNode(tn, false, tva);
foreach (MultiSelectTreeNode node in tn.Nodes)
{
UnselectNodesRecursively(node, tva);
}
}
public static void TreeView_AfterCheck(TreeViewAction action, TreeNode node)
{
if (action != TreeViewAction.Unknown)
{
LogHelper.Log("check node " + node.Text + " tag " + node.Tag + " Level " + node.Level.ToString());
SetChildNodeCheckedState(node, node.Checked);
SetParentNodeCheckedState(node, node.Checked);
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="cancel">if set to <c>true</c> [cancel].</param>
/// <param name="action">The action.</param>
/// <param name="currentStateImageIndex">Index of the current state image.</param>
/// <param name="newStateImageIndex">New index of the state image.</param>
public TreeViewCancelTriStateEventArgs(
TreeNode node,
bool cancel,
TreeViewAction action,
int currentStateImageIndex,
int newStateImageIndex)
:
base(node, cancel, action)
{
this.currentStateImageIndex = currentStateImageIndex;
this.newStateImageIndex = newStateImageIndex;
}
public void SelectNode(TreeNode[] nodes, TreeViewAction action, bool exclusive)
{
if (exclusive)
{
ClearSelectedNodes(action);
}
foreach (TreeNode node in nodes)
{
SelectNode(node, true, action);
}
}
/// <summary>
/// Applies a new check state to the given tree node.
/// The UseTriStateCheckBoxes property must be set to TRUE.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="checkState">State of the check.</param>
private void DoSetNodeCheckState(
TreeNode node,
TreeViewAction action,
CheckState checkState)
{
// Use TreeViewAction.ByKeyboard here,
// to indicate that it was called from outside.
SetTriStateToNode(
node,
action,
ConvertCheckStateToImageIndex(checkState),
true);
}
/// <summary>
/// Applies the given state to the given node.
/// Raises events, too.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="stateImageIndex">Index of the state image.</param>
/// <param name="raiseEvents">if set to <c>true</c> [raise events].</param>
private void SetTriStateToNode(
TreeNode node,
TreeViewAction action,
int stateImageIndex,
bool raiseEvents)
{
bool canSet = true;
if (raiseEvents)
{
TreeViewCancelEventArgs args =
new TreeViewCancelEventArgs(node, false, action);
OnBeforeCheck(args);
TreeViewCancelTriStateEventArgs triArgs =
new TreeViewCancelTriStateEventArgs(
node,
args.Cancel,
action,
node.StateImageIndex,
stateImageIndex);
OnBeforeTriStateCheck(triArgs);
canSet = !triArgs.Cancel;
}
if (canSet)
{
// Actually set.
// THIS IS THE ONLY PLACE to set.
node.StateImageIndex = stateImageIndex;
if (raiseEvents)
{
TreeViewEventArgs args =
new TreeViewEventArgs(node, action);
OnAfterCheck(args);
TreeViewTriStateEventArgs triArgs =
new TreeViewTriStateEventArgs(
node,
action,
node.StateImageIndex);
OnAfterTriStateCheck(triArgs);
}
}
}
private void UnselectAllNodesNotBelongingToLevel(int level, TreeViewAction tva)
{
ArrayList list = new ArrayList();
foreach (MultiSelectTreeNode node in _selectedNodes)
{
if (GetNodeLevel(node) != level)
{
list.Add(node);
}
}
foreach (MultiSelectTreeNode node2 in list)
{
SelectNode(node2, false, tva);
}
}
protected virtual void OnCustomCheck(TreeNode node, TreeViewAction action)
{
var e = new TreeViewCancelEventArgs(node, false, action);
OnBeforeCheck(e);
if (e.Cancel)
{
return;
}
if (node is IStateTreeNode)
{
((IStateTreeNode)node).UpdateState(e);
}
OnAfterCheck(new TreeViewEventArgs(node, action));
}
/// <summary>Toggles the CheckState of the specified node on response of a click/keyboard event.</summary>
/// <param name="node">The node affected by the event.</param>
/// <param name="action">The action that caused the event.</param>
private void ToggleNodeCheckState(TreeNode node, TreeViewAction action)
{
// Compute the new check box state of the node
CheckState newState;
switch ((CheckState)node.StateImageIndex)
{
case CheckState.Unchecked: newState = CheckState.Checked; break;
case CheckState.Checked: newState = CheckState.Unchecked; break;
case CheckState.Indeterminate: newState = CheckState.Checked; break; // Standard behaviour
default: throw new InvalidOperationException("Invalid TreeNode.StateImageIndex - Check your code.");
}
// Update the checked state of the node
SetCheckStateImpl(node, newState, action);
}
private void ChangeNodeStateByUser(TreeNode node, TreeViewAction action)
{
if (this.BeforeNodeStateChangeByUser != null)
{
this.BeforeNodeStateChangeByUser(this, new TreeViewEventArgs(node, action));
}
switch (node.StateImageIndex)
{
case ItemState.Unchecked:
case ItemState.Mixed:
node.StateImageIndex = ItemState.Checked;
break;
case ItemState.Checked:
node.StateImageIndex = ItemState.Unchecked;
break;
}
UpdateChildren(node);
UpdateParent(node);
}
private void SetCheckStateImpl(TreeNode node, CheckState newState, TreeViewAction action)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (newState != CheckState.Checked && newState != CheckState.Unchecked)
{
throw new ArgumentOutOfRangeException("newState", "Only checked and unchecked states can be set.");
}
// Set the check state and update the children and parent
PropagateNodeCheckStateDown(node, newState);
PropagateNodeCheckStateUp(node);
// Trigger the AfterCheckState event on the affected node
if (AfterCheckState != null)
{
AfterCheckState(this, new TreeViewEventArgs(node, action));
}
}
private bool SelectNode(MultiSelectTreeNode node, bool select, TreeViewAction tva)
{
bool selected = false;
if (node == null)
{
return(false);
}
if (select)
{
if (!IsNodeSelected(node))
{
MultiSelectTreeViewCancelEventArgs e = new MultiSelectTreeViewCancelEventArgs(node, false, tva);
OnBeforeSelect(e);
if (e.Cancel)
{
return(false);
}
_selectedNodes.Add(node);
selected = true;
_selectionChanged = true;
OnAfterSelect(new TreeViewEventArgs(node, tva));
}
_mostRecentSelectedNode = node;
return(selected);
}
if (IsNodeSelected(node))
{
OnBeforeDeselect(new TreeViewEventArgs(node));
_selectedNodes.Remove(node);
_selectionChanged = true;
OnAfterDeselect(new TreeViewEventArgs(node));
}
return(selected);
}
private void tvClientesServicios_BeforeCheck(object sender, TreeViewCancelEventArgs e)
{
action = e.Action;
}
// Constructor.
public TreeViewEventArgs(TreeNode node, TreeViewAction action)
{
this.node = node;
this.action = action;
}
// 选中或取消选中 Dpu 时执行的操作
private void treDpuCatalog_AfterCheck(object sender, TreeViewEventArgs e)
{
// 改变子节点的选中状态
if ((e.Action == TreeViewAction.ByMouse || actionTemp == TreeViewAction.ByMouse) && e.Node.Nodes.Count > 0)
{
foreach (TreeNode node in e.Node.Nodes)
{
actionTemp = TreeViewAction.ByMouse;
node.Checked = e.Node.Checked;
}
}
actionTemp = TreeViewAction.Unknown;
// 改变父节点的选中状态
if (e.Node.Parent != null)
{
if (!e.Node.Checked)
{
bool hasChecked = false;
foreach (TreeNode node in e.Node.Parent.Nodes)
{
if (node.Checked)
{
hasChecked = true;
break;
}
}
e.Node.Parent.Checked = hasChecked;
}
else
{
e.Node.Parent.Checked = true;
}
}
if ((e.Node.Tag as NodeTag).type == NodeType.Controller)
{
if (e.Node.Checked)
{
// 加载选中 Dpu 下的文档列表
BllManager bll = new BllManager(manager);
IList <Prj_Document> documents = bll.manager.DocumentCRUD.GetPrj_Documents_By_Prj_Controller_ID((e.Node.Tag as NodeTag).id);
foreach (Prj_Document doc in documents)
{
ListViewItem item = new ListViewItem(
new string[] {
doc.DocumentName.Substring(0, doc.DocumentName.IndexOf('-')).PadLeft(3, '0') + "-"
+ doc.DocumentName.Substring(doc.DocumentName.IndexOf('-') + 1).PadLeft(3, '0'),
doc.DocumentCaption
});
item.Tag = doc;
item.ToolTipText = doc.DocumentCaption;
this.lstPages.Items.Add(item);
}
}
else
{
// 移除对应 Dpu 的文档列表
IList <int> mastLeavedId = new List <int>();
for (int i = 0; i < this.lstPages.Items.Count;)
{
if (((Prj_Document)this.lstPages.Items[i].Tag).Prj_Controller_ID == (((NodeTag)e.Node.Tag).id))
{
this.lstPages.Items.Remove(this.lstPages.Items[i]);
}
else
{
i++;
}
}
}
}
}
/// <summary>
/// Unselects nodes outside the specified range.
/// </summary>
/// <param name="startNode">Start node.</param>
/// <param name="endNode">End node.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectNodesOutsideRange(TreeNode startNode, TreeNode endNode, TreeViewAction tva)
{
// Calculate start node and end node
TreeNode firstNode = null;
TreeNode lastNode = null;
if (startNode.Bounds.Y < endNode.Bounds.Y)
{
firstNode = startNode;
lastNode = endNode;
}
else
{
firstNode = endNode;
lastNode = startNode;
}
// Unselect each node outside range
TreeNode tnTemp = firstNode;
while (tnTemp != null)
{
tnTemp = tnTemp.PrevVisibleNode;
if (tnTemp != null)
{
SelectNode(tnTemp, false, tva);
}
}
tnTemp = lastNode;
while (tnTemp != null)
{
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
SelectNode(tnTemp, false, tva);
}
}
}
/// <summary>
/// (Un)selects the specified node.
/// </summary>
/// <param name="tn">Node to (un)select.</param>
/// <param name="select">True to select node, false to unselect node.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
/// <returns>True if node was selected, false if not.</returns>
private bool SelectNode(TreeNode tn, bool select, TreeViewAction tva)
{
bool blnSelected = false;
if (tn == null)
return false;
if (select)
{
// Only try to select node if it was not already selected
if (!IsNodeSelected(tn))
{
// Check if node selection is cancelled
TreeViewCancelEventArgs tvcea = new TreeViewCancelEventArgs(tn, false, tva);
base.OnBeforeSelect(tvcea);
if (tvcea.Cancel)
{
// This node selection was cancelled!
return false;
}
PreserveNodeColors(tn);
tn.BackColor = SelectionBackColor; // GKM moved from above
tn.ForeColor = BackColor; // GKM moved from above
htblSelectedNodes.Add(tn.GetHashCode(), tn);
blnSelected = true;
blnSelectionChanged = true;
base.OnAfterSelect(new TreeViewEventArgs(tn, tva));
}
tnMostRecentSelectedNode = tn;
}
else
{
// Only unselect node if it was selected
if (IsNodeSelected(tn))
{
OnBeforeDeselect(tn);
Color[] originalColors = (Color[])this.htblSelectedNodesOrigColors[tn.GetHashCode()];
if (originalColors != null)
{
htblSelectedNodes.Remove(tn.GetHashCode());
blnSelectionChanged = true;
htblSelectedNodesOrigColors.Remove(tn.GetHashCode());
// GKM - Restore original node colors
tn.BackColor = originalColors[0]; // GKM - was BackColor;
tn.ForeColor = originalColors[1]; // GKM - was ForeColor;
}
OnAfterDeselect(tn);
}
}
return blnSelected;
}
/// <summary>
/// Unselects all selected nodes that don't belong directly or indirectly to the specified parent.
/// </summary>
/// <param name="parent">Parent node.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectAllNodesNotBelongingToParent(TreeNode parent, TreeViewAction tva)
{
// First, build list of nodes that need to be unselected
ArrayList arrNodesToDeselect = new ArrayList();
foreach (TreeNode selectedTreeNode in htblSelectedNodes.Values)
{
if (!IsChildOf(selectedTreeNode, parent))
{
arrNodesToDeselect.Add(selectedTreeNode);
}
}
// Do the actual unselect
foreach (TreeNode tnToDeselect in arrNodesToDeselect)
{
SelectNode(tnToDeselect, false, tva);
}
}
/// <summary>
/// Unselects all selected nodes.
/// </summary>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectAllNodes(TreeViewAction tva)
{
UnselectAllNodesExceptNode(null, tva);
}
private static void ModifyFolderExpandedState(TreeNode Node, TreeViewAction Action)
{
ConfigItems.NodeDescription nodeDescr = (ConfigItems.NodeDescription)Node.Tag;
switch (nodeDescr.TreeNodeType)
{
case NodeType.Folder:
ConfigItems.TDSQueriesTree.FoldersRow folder = (ConfigItems.TDSQueriesTree.FoldersRow)nodeDescr.NodeData;
folder.Expanded = (Action == TreeViewAction.Expand ? true : false);
break;
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="cancel">if set to <c>true</c> [cancel].</param>
/// <param name="action">The action.</param>
/// <param name="currentStateImageIndex">Index of the current state image.</param>
/// <param name="newStateImageIndex">New index of the state image.</param>
public TreeViewCancelTriStateEventArgs(
TreeNode node,
bool cancel,
TreeViewAction action,
int currentStateImageIndex,
int newStateImageIndex )
:
base( node, cancel, action )
{
this.currentStateImageIndex = currentStateImageIndex;
this.newStateImageIndex = newStateImageIndex;
}
/// <summary>
/// Applies the given state to the given node.
/// Raises events, too.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="stateImageIndex">Index of the state image.</param>
/// <param name="raiseEvents">if set to <c>true</c> [raise events].</param>
private void SetTriStateToNode(
TreeNode node,
TreeViewAction action,
int stateImageIndex,
bool raiseEvents )
{
bool canSet = true;
if ( raiseEvents )
{
TreeViewCancelEventArgs args =
new TreeViewCancelEventArgs( node, false, action );
OnBeforeCheck( args );
TreeViewCancelTriStateEventArgs triArgs =
new TreeViewCancelTriStateEventArgs(
node,
args.Cancel,
action,
node.StateImageIndex,
stateImageIndex );
OnBeforeTriStateCheck( triArgs );
canSet = !triArgs.Cancel;
}
if ( canSet )
{
// Actually set.
// THIS IS THE ONLY PLACE to set.
node.StateImageIndex = stateImageIndex;
if ( raiseEvents )
{
TreeViewEventArgs args =
new TreeViewEventArgs( node, action );
OnAfterCheck( args );
TreeViewTriStateEventArgs triArgs =
new TreeViewTriStateEventArgs(
node,
action,
node.StateImageIndex );
OnAfterTriStateCheck( triArgs );
}
}
}
internal bool TreeViewBeforeCheck(TreeNode node, TreeViewAction actionTaken)
{
TreeViewCancelEventArgs e = new TreeViewCancelEventArgs(node, false, actionTaken);
this.OnBeforeCheck(e);
return e.Cancel;
}
public TreeViewEventArgs(TreeNode node, TreeViewAction action)
{
Action = action;
Node = node;
}
/// <summary>
/// Selects nodes within the specified range.
/// </summary>
/// <param name="startNode">Start node.</param>
/// <param name="endNode">End Node.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void SelectNodesInsideRange(TreeNode startNode, TreeNode endNode, TreeViewAction tva)
{
// Calculate start node and end node
TreeNode firstNode = null;
TreeNode lastNode = null;
SortNodes(ref startNode, ref endNode);
firstNode = startNode;
lastNode = endNode;
//This was a terrible idea, whoever came up with it...
// Bounds are not updated always and it's not fixable as it's part of .NET framework.
// Much better is to rely on a real index in a tree model
/*
if (startNode.Bounds.Y < endNode.Bounds.Y)
{
firstNode = startNode;
lastNode = endNode;
}
else
{
firstNode = endNode;
lastNode = startNode;
}
*/
// Select each node in range
SelectNode(firstNode, true, tva);
TreeNode tnTemp = firstNode;
while (tnTemp != lastNode)
{
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
SelectNode(tnTemp, true, tva);
}
}
SelectNode(lastNode, true, tva);
}
public VirtualTreeViewEventArgs(VirtualTreeNode node, TreeViewAction action)
: this(node)
{
_action = action;
}
protected override void OnKeyDown (KeyEventArgs e)
{
OpenTreeNodeEnumerator ne;
switch (e.KeyData & Keys.KeyCode) {
case Keys.Add:
if (selected_node != null && selected_node.IsExpanded)
selected_node.Expand ();
break;
case Keys.Subtract:
if (selected_node != null && selected_node.IsExpanded)
selected_node.Collapse ();
break;
case Keys.Left:
if (selected_node != null) {
if (selected_node.IsExpanded && selected_node.Nodes.Count > 0)
selected_node.Collapse ();
else {
TreeNode parent = selected_node.Parent;
if (parent != null) {
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = parent;
}
}
}
break;
case Keys.Right:
if (selected_node != null) {
if (!selected_node.IsExpanded)
selected_node.Expand ();
else {
TreeNode child = selected_node.FirstNode;
if (child != null)
SelectedNode = child;
}
}
break;
case Keys.Up:
if (selected_node != null) {
ne = new OpenTreeNodeEnumerator (selected_node);
if (ne.MovePrevious () && ne.MovePrevious ()) {
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
}
break;
case Keys.Down:
if (selected_node != null) {
ne = new OpenTreeNodeEnumerator (selected_node);
if (ne.MoveNext () && ne.MoveNext ()) {
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
}
break;
case Keys.Home:
if (root_node.Nodes.Count > 0) {
ne = new OpenTreeNodeEnumerator (root_node.Nodes [0]);
if (ne.MoveNext ()) {
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
}
break;
case Keys.End:
if (root_node.Nodes.Count > 0) {
ne = new OpenTreeNodeEnumerator (root_node.Nodes [0]);
while (ne.MoveNext ())
{ }
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
break;
case Keys.PageDown:
if (selected_node != null) {
ne = new OpenTreeNodeEnumerator (selected_node);
int move = VisibleCount;
for (int i = 0; i < move && ne.MoveNext (); i++) {
}
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
break;
case Keys.PageUp:
if (selected_node != null) {
ne = new OpenTreeNodeEnumerator (selected_node);
int move = VisibleCount;
for (int i = 0; i < move && ne.MovePrevious (); i++)
{ }
selection_action = TreeViewAction.ByKeyboard;
SelectedNode = ne.CurrentNode;
}
break;
case Keys.Multiply:
if (selected_node != null)
selected_node.ExpandAll ();
break;
}
base.OnKeyDown (e);
if (!e.Handled && checkboxes &&
selected_node != null &&
(e.KeyData & Keys.KeyCode) == Keys.Space) {
selected_node.check_reason = TreeViewAction.ByKeyboard;
selected_node.Checked = !selected_node.Checked;
e.Handled = true;
}
}
/// <summary>
/// Processes a node range.
/// </summary>
/// <param name="startNode">Start node of range.</param>
/// <param name="endNode">End node of range.</param>
/// <param name="e">MouseEventArgs.</param>
/// <param name="keys">Keys.</param>
/// <param name="tva">TreeViewAction.</param>
/// <param name="allowStartEdit">True if node can go to edit mode, false if not.</param>
private void ProcessNodeRange(TreeNode startNode, TreeNode endNode, MouseEventArgs e, Keys keys, TreeViewAction tva, bool allowStartEdit)
{
blnSelectionChanged = false; // prepare for OnSelectionsChanged
if (e.Button == MouseButtons.Left)
{
blnWasDoubleClick = (intMouseClicks == 2);
TreeNode tnTemp = null;
int intNodeLevelStart;
if (((keys & Keys.Control) == 0) && ((keys & Keys.Shift) == 0))
{
// CTRL and SHIFT not held down
tnSelectionMirrorPoint = endNode;
int intNumberOfSelectedNodes = SelectedNodes.Count;
// If it was a double click, select node and suspend further processing
if (blnWasDoubleClick)
{
base.OnMouseDown(e);
return;
}
if (!IsPlusMinusClicked(endNode, e))
{
bool blnNodeWasSelected = false;
if (IsNodeSelected(endNode))
blnNodeWasSelected = true;
UnselectAllNodesExceptNode(endNode, tva);
SelectNode(endNode, true, tva);
if ((blnNodeWasSelected) && (LabelEdit) && (allowStartEdit) && (!blnWasDoubleClick) && (intNumberOfSelectedNodes <= 1))
{
// Node should be put in edit mode
tnNodeToStartEditOn = endNode;
System.Threading.Thread t = new System.Threading.Thread(new System.Threading.ThreadStart(StartEdit));
t.Start();
}
}
}
else if (((keys & Keys.Control) != 0) && ((keys & Keys.Shift) == 0))
{
// CTRL held down
tnSelectionMirrorPoint = null;
if (!IsNodeSelected(endNode))
{
switch (selectionMode)
{
case TreeViewSelectionMode.SingleSelect:
UnselectAllNodesExceptNode(endNode, tva);
break;
case TreeViewSelectionMode.MultiSelectSameRootBranch:
TreeNode tnAbsoluteParent2 = GetRootParent(endNode);
UnselectAllNodesNotBelongingToParent(tnAbsoluteParent2, tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevel:
UnselectAllNodesNotBelongingToLevel(GetNodeLevel(endNode), tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevelAndRootBranch:
TreeNode tnAbsoluteParent = GetRootParent(endNode);
UnselectAllNodesNotBelongingToParent(tnAbsoluteParent, tva);
UnselectAllNodesNotBelongingToLevel(GetNodeLevel(endNode), tva);
break;
case TreeViewSelectionMode.MultiSelectSameParent:
TreeNode tnParent = endNode.Parent;
UnselectAllNodesNotBelongingDirectlyToParent(tnParent, tva);
break;
}
SelectNode(endNode, true, tva);
}
else
{
SelectNode(endNode, false, tva);
}
}
else if (((keys & Keys.Control) == 0) && ((keys & Keys.Shift) != 0))
{
// SHIFT pressed
if (tnSelectionMirrorPoint == null)
{
tnSelectionMirrorPoint = startNode;
}
switch (selectionMode)
{
case TreeViewSelectionMode.SingleSelect:
UnselectAllNodesExceptNode(endNode, tva);
SelectNode(endNode, true, tva);
break;
case TreeViewSelectionMode.MultiSelectSameRootBranch:
TreeNode tnAbsoluteParentStartNode = GetRootParent(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
TreeNode tnAbsoluteParent = GetRootParent(tnTemp);
if (tnAbsoluteParent == tnAbsoluteParentStartNode)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStartNode, tva);
UnselectNodesOutsideRange(tnSelectionMirrorPoint, endNode, tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevel:
intNodeLevelStart = GetNodeLevel(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
int intNodeLevel = GetNodeLevel(tnTemp);
if (intNodeLevel == intNodeLevelStart)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToLevel(intNodeLevelStart, tva);
UnselectNodesOutsideRange(tnSelectionMirrorPoint, endNode, tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevelAndRootBranch:
TreeNode tnAbsoluteParentStart = GetRootParent(startNode);
intNodeLevelStart = GetNodeLevel(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
int intNodeLevel = GetNodeLevel(tnTemp);
TreeNode tnAbsoluteParent = GetRootParent(tnTemp);
if ((intNodeLevel == intNodeLevelStart) && (tnAbsoluteParent == tnAbsoluteParentStart))
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStart, tva);
UnselectAllNodesNotBelongingToLevel(intNodeLevelStart, tva);
UnselectNodesOutsideRange(tnSelectionMirrorPoint, endNode, tva);
break;
case TreeViewSelectionMode.MultiSelect:
SelectNodesInsideRange(tnSelectionMirrorPoint, endNode, tva);
UnselectNodesOutsideRange(tnSelectionMirrorPoint, endNode, tva);
break;
case TreeViewSelectionMode.MultiSelectSameParent:
TreeNode tnParentStartNode = startNode.Parent;
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
TreeNode tnParent = tnTemp.Parent;
if (tnParent == tnParentStartNode)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingDirectlyToParent(tnParentStartNode, tva);
UnselectNodesOutsideRange(tnSelectionMirrorPoint, endNode, tva);
break;
}
}
else if (((keys & Keys.Control) != 0) && ((keys & Keys.Shift) != 0))
{
// SHIFT AND CTRL pressed
switch (selectionMode)
{
case TreeViewSelectionMode.SingleSelect:
UnselectAllNodesExceptNode(endNode, tva);
SelectNode(endNode, true, tva);
break;
case TreeViewSelectionMode.MultiSelectSameRootBranch:
TreeNode tnAbsoluteParentStartNode = GetRootParent(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
TreeNode tnAbsoluteParent = GetRootParent(tnTemp);
if (tnAbsoluteParent == tnAbsoluteParentStartNode)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStartNode, tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevel:
intNodeLevelStart = GetNodeLevel(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
int intNodeLevel = GetNodeLevel(tnTemp);
if (intNodeLevel == intNodeLevelStart)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToLevel(intNodeLevelStart, tva);
break;
case TreeViewSelectionMode.MultiSelectSameLevelAndRootBranch:
TreeNode tnAbsoluteParentStart = GetRootParent(startNode);
intNodeLevelStart = GetNodeLevel(startNode);
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
int intNodeLevel = GetNodeLevel(tnTemp);
TreeNode tnAbsoluteParent = GetRootParent(tnTemp);
if ((intNodeLevel == intNodeLevelStart) && (tnAbsoluteParent == tnAbsoluteParentStart))
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStart, tva);
UnselectAllNodesNotBelongingToLevel(intNodeLevelStart, tva);
break;
case TreeViewSelectionMode.MultiSelect:
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
SelectNode(tnTemp, true, tva);
}
}
break;
case TreeViewSelectionMode.MultiSelectSameParent:
TreeNode tnParentStartNode = startNode.Parent;
tnTemp = startNode;
// Check each visible node from startNode to endNode and select it if needed
while ((tnTemp != null) && (tnTemp != endNode))
{
if (startNode.Bounds.Y > endNode.Bounds.Y)
tnTemp = tnTemp.PrevVisibleNode;
else
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
TreeNode tnParent = tnTemp.Parent;
if (tnParent == tnParentStartNode)
{
SelectNode(tnTemp, true, tva);
}
}
}
UnselectAllNodesNotBelongingDirectlyToParent(tnParentStartNode, tva);
break;
}
}
}
else if (e.Button == MouseButtons.Right)
{
// if right mouse button clicked, clear selection and select right-clicked node
if (!IsNodeSelected(endNode))
{
UnselectAllNodes(tva);
SelectNode(endNode, true, tva);
}
}
OnSelectionsChanged();
}
/// <summary>
/// Toggles the tri state check.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
private void ToggleTriStateCheck(
TreeNode node,
TreeViewAction action )
{
if ( node.StateImageIndex == TriStateUncheckedStateImageIndex )
{
SetTriStateToNode(
node,
action,
TriStateCheckedStateImageIndex,
true );
}
else if ( node.StateImageIndex == TriStateIndeterminateStateImageIndex &&
indeterminateToChecked )
{
SetTriStateToNode(
node,
action,
TriStateCheckedStateImageIndex,
true );
}
else
{
SetTriStateToNode(
node,
action,
TriStateUncheckedStateImageIndex,
true );
}
}
/// <summary>
/// Unselects all selected nodes that don't belong to the specified level.
/// </summary>
/// <param name="level">Node level.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectAllNodesNotBelongingToLevel(int level, TreeViewAction tva)
{
// First, build list of nodes that need to be unselected
ArrayList arrNodesToDeselect = new ArrayList();
foreach (TreeNode selectedTreeNode in htblSelectedNodes.Values)
{
if (GetNodeLevel(selectedTreeNode) != level)
{
arrNodesToDeselect.Add(selectedTreeNode);
}
}
// Do the actual unselect
foreach (TreeNode tnToDeselect in arrNodesToDeselect)
{
SelectNode(tnToDeselect, false, tva);
}
}
/// <summary>
/// Applies a new check state to the given tree node.
/// The UseTriStateCheckBoxes property must be set to TRUE.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="checkState">State of the check.</param>
private void DoSetNodeCheckState(
TreeNode node,
TreeViewAction action,
CheckState checkState )
{
// Use TreeViewAction.ByKeyboard here,
// to indicate that it was called from outside.
SetTriStateToNode(
node,
action,
ConvertCheckStateToImageIndex( checkState ),
true );
}
/// <summary>
/// Unselects all selected nodes, except for the specified node which should not be touched.
/// </summary>
/// <param name="nodeKeepSelected">Node not to touch.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectAllNodesExceptNode(TreeNode nodeKeepSelected, TreeViewAction tva)
{
// First, build list of nodes that need to be unselected
ArrayList arrNodesToDeselect = new ArrayList();
foreach (TreeNode selectedTreeNode in htblSelectedNodes.Values)
{
if (nodeKeepSelected == null)
{
arrNodesToDeselect.Add(selectedTreeNode);
}
else if ((nodeKeepSelected != null) && (selectedTreeNode != nodeKeepSelected))
{
arrNodesToDeselect.Add(selectedTreeNode);
}
}
// Do the actual unselect
foreach (TreeNode tnToDeselect in arrNodesToDeselect)
{
SelectNode(tnToDeselect, false, tva);
}
}
public EasyTreeViewEventArgs(object node, TreeViewAction action)
{
this.node = node;
this.action = action;
}
/// <summary>
/// Selects nodes within the specified range.
/// </summary>
/// <param name="startNode">Start node.</param>
/// <param name="endNode">End Node.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void SelectNodesInsideRange(TreeNode startNode, TreeNode endNode, TreeViewAction tva)
{
// Calculate start node and end node
TreeNode firstNode = null;
TreeNode lastNode = null;
if (startNode.Bounds.Y < endNode.Bounds.Y)
{
firstNode = startNode;
lastNode = endNode;
}
else
{
firstNode = endNode;
lastNode = startNode;
}
// Select each node in range
SelectNode(firstNode, true, tva);
TreeNode tnTemp = firstNode;
while (tnTemp != lastNode)
{
tnTemp = tnTemp.NextVisibleNode;
if (tnTemp != null)
{
SelectNode(tnTemp, true, tva);
}
}
SelectNode(lastNode, true, tva);
}
/// <include file='doc\TreeView.uex' path='docs/doc[@for="TreeView.TreeViewBeforeAfterCheck"]/*' />
/// <devdoc>
/// Defined so that a tree node can use it
///
/// </devdoc>
/// <internalonly/>
internal bool TreeViewBeforeCheck(TreeNode node, TreeViewAction actionTaken) {
TreeViewCancelEventArgs tvce = new TreeViewCancelEventArgs(node, false, actionTaken);
OnBeforeCheck(tvce);
return (tvce.Cancel);
}
/// <summary>
/// Recursively unselect node.
/// </summary>
/// <param name="tn">Node to recursively unselect.</param>
/// <param name="tva">Specifies the action that caused the selection change.</param>
private void UnselectNodesRecursively(TreeNode tn, TreeViewAction tva)
{
SelectNode(tn, false, tva);
foreach (TreeNode child in tn.Nodes)
{
UnselectNodesRecursively(child, tva);
}
}
internal void TreeViewAfterCheck(TreeNode node, TreeViewAction actionTaken) {
OnAfterCheck(new TreeViewEventArgs(node, actionTaken));
}
public TreeViewSelectedNodeChangedArgs(TreeNode beforeNode, TreeNode afterNode, TreeViewAction action)
{
BeforeNode = beforeNode;
AfterNode = afterNode;
Action = action;
}
public TreeViewEventArgs(TreeNode node, TreeViewAction action)
{
}
public TreeViewEventArgs(TreeNode node)
{
this.node = node;
this.action = TreeViewAction.Unknown;
}
private void tsResults_AfterExpand(object sender, TreeViewEventArgs e)
{
TreeViewAction action = e.Action;
}
/// <summary>
/// Initializes a new instance of the <see cref="TreeViewTriStateEventArgs"/> class.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="action">The action.</param>
/// <param name="stateImageIndex">Index of the state image.</param>
public TreeViewTriStateEventArgs(
TreeNode node,
TreeViewAction action,
int stateImageIndex )
:
base( node, action )
{
this.stateImageIndex = stateImageIndex;
}
public TreeViewEventArgs(TreeNode?node, TreeViewAction action)
{
Node = node;
Action = action;
}
public VirtualTreeViewCancelEventArgs(VirtualTreeNode node, bool cancel, TreeViewAction action)
: base(cancel)
{
_node = node;
_action = action;
}
public MultiSelectTreeViewCancelEventArgs(MultiSelectTreeNode node, bool cancel, TreeViewAction action)
: base(cancel)
{
_node = node;
_action = action;
}
public TreeViewEventArgs(TreeNode node, TreeViewAction action)
{
this.node = node;
this.action = action;
}
private void ChangeNodeStateByUser(TreeNode node, TreeViewAction action)
{
if (this.BeforeNodeStateChangeByUser != null)
{
this.BeforeNodeStateChangeByUser(this, new TreeViewEventArgs(node, action));
}
switch (node.StateImageIndex)
{
case ItemState.Unchecked:
case ItemState.Mixed:
node.StateImageIndex = ItemState.Checked;
break;
case ItemState.Checked:
node.StateImageIndex = ItemState.Unchecked;
break;
}
UpdateChildren(node);
UpdateParent(node);
}
public TreeViewEventArgs(TreeNode node, TreeViewAction action) : this(node)
{
this.action = action;
}
public TreeViewEventArgs(TreeNode node, TreeViewAction action)
{
Action = action;
Node = node;
}
