mirror of
https://github.com/xcp-ng/xenadmin.git
synced 2024-12-04 09:01:06 +01:00
1192 lines
46 KiB
C#
1192 lines
46 KiB
C#
/* Copyright (c) Cloud Software Group, Inc.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Windows.Forms;
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using System.Drawing;
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using System.Collections;
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using System.ComponentModel;
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using System.Threading;
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using XenCenterLib;
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using System.Runtime.InteropServices;
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namespace XenAdmin.Controls
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{
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public enum TreeViewSelectionMode
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{
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SingleSelect,
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MultiSelect,
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MultiSelectSameRootBranch,
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MultiSelectSameLevel,
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MultiSelectSameLevelAndRootBranch,
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MultiSelectSameParent
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}
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public interface IMultiSelectTreeNodeCollectionOwner
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{
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/// <summary>
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/// Gets a complete collection of nodes owned.
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/// </summary>
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TreeNodeCollection Nodes { get;}
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}
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public partial class MultiSelectTreeView : TreeView, IMultiSelectTreeNodeCollectionOwner
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{
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private bool _nodeProcessedOnMouseDown;
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private bool _selectionChanged;
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private bool _wasDoubleClick;
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private readonly InternalSelectedNodeCollection _internalSelectedNodes = new InternalSelectedNodeCollection();
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private readonly MultiSelectTreeSelectedNodeCollection _selectedNodes;
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private int intMouseClicks;
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private TreeViewSelectionMode _selectionMode;
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private MultiSelectTreeNode _keysStartNode;
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private MultiSelectTreeNode _mostRecentSelectedNode;
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private MultiSelectTreeNode _nodeToStartEditOn;
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private MultiSelectTreeNode _selectionMirrorPoint;
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private MultiSelectTreeNodeCollection _nodes;
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public Point LastMouseDownEventPosition { get; private set; }
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public event TreeViewEventHandler AfterDeselect;
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public event TreeViewEventHandler BeforeDeselect;
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public event EventHandler SelectionsChanged;
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public new event EventHandler<MultiSelectTreeViewCancelEventArgs> BeforeSelect;
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public new event EventHandler<MultiSelectTreeViewItemDragEventArgs> ItemDrag;
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public MultiSelectTreeView()
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{
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_selectedNodes = new MultiSelectTreeSelectedNodeCollection(this);
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_nodes = new MultiSelectTreeNodeCollection(this);
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}
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public new MultiSelectTreeNodeCollection Nodes
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{
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get
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{
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return _nodes;
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}
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}
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private MultiSelectTreeNode GetLastVisibleNode()
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{
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MultiSelectTreeNode nextVisibleNode = Nodes[0];
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while (nextVisibleNode.NextVisibleNode != null)
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{
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nextVisibleNode = nextVisibleNode.NextVisibleNode;
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}
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return nextVisibleNode;
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}
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private MultiSelectTreeNode GetNextTreeNode(MultiSelectTreeNode start, bool down, int intNumber)
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{
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int num = 0;
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MultiSelectTreeNode nextVisibleNode = start;
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while (num < intNumber)
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{
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if (down)
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{
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if (nextVisibleNode.NextVisibleNode == null)
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{
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return nextVisibleNode;
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}
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nextVisibleNode = nextVisibleNode.NextVisibleNode;
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}
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else
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{
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if (nextVisibleNode.PrevVisibleNode == null)
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{
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return nextVisibleNode;
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}
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nextVisibleNode = nextVisibleNode.PrevVisibleNode;
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}
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num++;
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}
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return nextVisibleNode;
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}
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public int GetNodeLevel(MultiSelectTreeNode node)
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{
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int num = 0;
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while ((node = node.Parent) != null)
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{
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num++;
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}
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return num;
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}
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private int GetNumberOfVisibleNodes()
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{
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int num = 0;
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for (MultiSelectTreeNode node = Nodes[0]; node != null; node = node.NextVisibleNode)
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{
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if (node.IsVisible)
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{
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num++;
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}
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}
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return num;
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}
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public MultiSelectTreeNode GetRootParent(MultiSelectTreeNode child)
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{
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MultiSelectTreeNode parent = child;
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while (parent.Parent != null)
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{
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parent = parent.Parent;
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}
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return parent;
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}
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private bool IsChildOf(MultiSelectTreeNode child, MultiSelectTreeNode parent)
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{
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for (MultiSelectTreeNode node = child; node != null; node = node.Parent)
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{
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if (node == parent)
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{
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return true;
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}
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}
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return false;
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}
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private bool IsClickOnNode(MultiSelectTreeNode node, MouseEventArgs e)
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{
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return node != null && e.X < node.Bounds.X + node.Bounds.Width;
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}
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private bool IsNodeSelected(MultiSelectTreeNode node)
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{
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return node != null && _internalSelectedNodes.Contains(node);
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}
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private bool IsPlusMinusClicked(MultiSelectTreeNode node, MouseEventArgs e)
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{
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return e.X < (20 + (GetNodeLevel(node) * 20)) - HScrollPos;
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}
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/// <summary>
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/// Occurs after a node is collapsed.
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/// </summary>
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/// <param name="e"></param>
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protected override void OnAfterCollapse(TreeViewEventArgs e)
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{
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_selectionChanged = false;
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// All child nodes should be deselected
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bool childSelected = false;
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foreach (MultiSelectTreeNode node in e.Node.Nodes)
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{
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if (IsNodeSelected(node))
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{
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childSelected = true;
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}
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UnselectNodesRecursively(node, TreeViewAction.Collapse);
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}
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if (childSelected)
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{
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SelectNode((MultiSelectTreeNode)e.Node, true, TreeViewAction.Collapse);
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}
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OnSelectionsChanged();
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base.OnAfterCollapse(e);
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}
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protected virtual void OnAfterDeselect(TreeViewEventArgs e)
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{
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TreeViewEventHandler handler = AfterDeselect;
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if (handler != null)
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{
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handler(this, e);
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}
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}
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protected virtual void OnBeforeDeselect(TreeViewEventArgs e)
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{
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TreeViewEventHandler handler = BeforeDeselect;
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if (handler != null)
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{
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handler(this, e);
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}
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}
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protected override void OnBeforeLabelEdit(NodeLabelEditEventArgs e)
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{
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_selectionChanged = false;
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SelectNode((MultiSelectTreeNode)e.Node, true, TreeViewAction.ByMouse);
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UnselectAllNodesExceptNode((MultiSelectTreeNode)e.Node, TreeViewAction.ByMouse);
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OnSelectionsChanged();
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}
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protected sealed override void OnBeforeSelect(TreeViewCancelEventArgs e)
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{
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e.Cancel = true;
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}
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protected virtual void OnBeforeSelect(MultiSelectTreeViewCancelEventArgs e)
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{
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EventHandler<MultiSelectTreeViewCancelEventArgs> handler = BeforeSelect;
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if (handler != null)
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{
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handler(this, e);
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}
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}
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protected sealed override void OnItemDrag(ItemDragEventArgs e)
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{
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OnItemDrag(new MultiSelectTreeViewItemDragEventArgs(MouseButtons.Left, SelectedNodes));
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}
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protected virtual void OnItemDrag(MultiSelectTreeViewItemDragEventArgs e)
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{
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EventHandler<MultiSelectTreeViewItemDragEventArgs> handler = ItemDrag;
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if (handler != null)
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{
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handler(this, e);
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}
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}
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protected override void OnKeyDown(KeyEventArgs e)
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{
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Keys none = Keys.None;
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switch (e.Modifiers)
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{
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case Keys.Shift:
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case Keys.Control:
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case (Keys.Control | Keys.Shift):
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none = Keys.Shift;
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if (_keysStartNode == null)
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{
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_keysStartNode = _mostRecentSelectedNode;
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}
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break;
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default:
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_keysStartNode = null;
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break;
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}
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int intNumber = 0;
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MultiSelectTreeNode endNode = null;
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switch (e.KeyCode)
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{
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case Keys.Prior:
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intNumber = GetNumberOfVisibleNodes();
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endNode = GetNextTreeNode(_mostRecentSelectedNode, false, intNumber);
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break;
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case Keys.Next:
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intNumber = GetNumberOfVisibleNodes();
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endNode = GetNextTreeNode(_mostRecentSelectedNode, true, intNumber);
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break;
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case Keys.End:
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endNode = GetLastVisibleNode();
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break;
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case Keys.Home:
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endNode = Nodes[0];
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break;
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case Keys.Left:
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if (_mostRecentSelectedNode != null)
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{
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if (_mostRecentSelectedNode.IsExpanded)
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_mostRecentSelectedNode.Collapse();
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else
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endNode = _mostRecentSelectedNode.Parent;
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}
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break;
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case Keys.Up:
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if (_mostRecentSelectedNode != null)
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endNode = _mostRecentSelectedNode.PrevVisibleNode;
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break;
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case Keys.Right:
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if (_mostRecentSelectedNode != null)
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{
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if (_mostRecentSelectedNode.IsExpanded)
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{
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endNode = _mostRecentSelectedNode.NextVisibleNode;
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if (endNode != null && !endNode.Parent.Equals(_mostRecentSelectedNode))
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endNode = null;
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}
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else
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_mostRecentSelectedNode.Expand();
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}
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break;
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case Keys.Down:
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if (_mostRecentSelectedNode != null)
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endNode = _mostRecentSelectedNode.NextVisibleNode;
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break;
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default:
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base.OnKeyDown(e);
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return;
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}
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if (endNode != null)
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{
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ProcessNodeRange(_keysStartNode, endNode, new MouseEventArgs(MouseButtons.Left, 1, Cursor.Position.X, Cursor.Position.Y, 0), none, TreeViewAction.ByKeyboard, false);
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_mostRecentSelectedNode = endNode;
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}
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if (_mostRecentSelectedNode != null)
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{
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MultiSelectTreeNode tnMostRecentSelectedNode = null;
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switch (e.KeyCode)
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{
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case Keys.Prior:
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tnMostRecentSelectedNode = GetNextTreeNode(_mostRecentSelectedNode, false, intNumber - 2);
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break;
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case Keys.Next:
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tnMostRecentSelectedNode = GetNextTreeNode(_mostRecentSelectedNode, true, intNumber - 2);
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break;
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case Keys.End:
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case Keys.Home:
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tnMostRecentSelectedNode = _mostRecentSelectedNode;
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break;
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case Keys.Up:
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tnMostRecentSelectedNode = GetNextTreeNode(_mostRecentSelectedNode, false, 5);
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break;
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case Keys.Down:
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tnMostRecentSelectedNode = GetNextTreeNode(_mostRecentSelectedNode, true, 5);
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break;
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}
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if (tnMostRecentSelectedNode != null)
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{
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if ((e.KeyData & Keys.Control) != 0 || (e.KeyData & Keys.Shift) != 0)
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{
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SuspendLayout();
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int prevScrollPos = HScrollPos;
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tnMostRecentSelectedNode.EnsureVisible();
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HScrollPos = prevScrollPos;
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ResumeLayout();
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}
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else
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{
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tnMostRecentSelectedNode.EnsureVisible();
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}
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}
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}
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base.OnKeyDown(e);
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}
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protected override void OnMouseDown(MouseEventArgs e)
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{
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LastMouseDownEventPosition = new Point(e.X, e.Y);
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_keysStartNode = null;
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intMouseClicks = e.Clicks;
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MultiSelectTreeNode nodeAt = (MultiSelectTreeNode)base.GetNodeAt(e.X, e.Y);
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if (nodeAt != null)
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{
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if (!IsPlusMinusClicked(nodeAt, e) && (nodeAt != null) && IsClickOnNode(nodeAt, e) && !IsNodeSelected(nodeAt))
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{
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_nodeProcessedOnMouseDown = true;
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ProcessNodeRange(_mostRecentSelectedNode, nodeAt, e, Control.ModifierKeys, TreeViewAction.ByMouse, true);
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}
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base.OnMouseDown(e);
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}
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}
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protected override void OnMouseUp(MouseEventArgs e)
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{
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if (!_nodeProcessedOnMouseDown)
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{
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MultiSelectTreeNode nodeAt = (MultiSelectTreeNode)base.GetNodeAt(e.X, e.Y);
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if (IsClickOnNode(nodeAt, e))
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{
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ProcessNodeRange(_mostRecentSelectedNode, nodeAt, e, Control.ModifierKeys, TreeViewAction.ByMouse, true);
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}
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}
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_nodeProcessedOnMouseDown = false;
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base.OnMouseUp(e);
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}
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/// <summary>
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/// Fires a SelectionsChanged event if the selection has changed.
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/// </summary>
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protected virtual void OnSelectionsChanged()
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{
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if (_selectionChanged)
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{
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EventHandler handler = SelectionsChanged;
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if (handler != null)
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{
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handler(this, EventArgs.Empty);
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}
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}
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}
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/// <summary>
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/// Forces the SelectionsChanged event to fire.
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/// </summary>
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public void ForceSelectionsChanged()
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{
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EventHandler handler = SelectionsChanged;
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if (handler != null)
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{
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handler(this, EventArgs.Empty);
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}
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}
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/// <summary>
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/// Processes a node range.
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/// </summary>
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/// <param name="startNode">Start node of range.</param>
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/// <param name="endNode">End node of range.</param>
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/// <param name="e">MouseEventArgs.</param>
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/// <param name="keys">Keys.</param>
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/// <param name="tva">TreeViewAction.</param>
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/// <param name="allowStartEdit">True if node can go to edit mode, false if not.</param>
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private void ProcessNodeRange(MultiSelectTreeNode startNode, MultiSelectTreeNode endNode, MouseEventArgs e, Keys keys, TreeViewAction tva, bool allowStartEdit)
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{
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_selectionChanged = false; // prepare for OnSelectionsChanged
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if (e.Button == MouseButtons.Left)
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{
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_wasDoubleClick = (intMouseClicks == 2);
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MultiSelectTreeNode tnTemp = null;
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int intNodeLevelStart;
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if (((keys & Keys.Control) == 0) && ((keys & Keys.Shift) == 0))
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{
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// CTRL and SHIFT not held down
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_selectionMirrorPoint = endNode;
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int intNumberOfSelectedNodes = SelectedNodes.Count;
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// If it was a double click, select node and suspend further processing
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if (_wasDoubleClick)
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{
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base.OnMouseDown(e);
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return;
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}
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if (!IsPlusMinusClicked(endNode, e))
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{
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bool blnNodeWasSelected = false;
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if (IsNodeSelected(endNode))
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blnNodeWasSelected = true;
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UnselectAllNodesExceptNode(endNode, tva);
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SelectNode(endNode, true, tva);
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if ((blnNodeWasSelected) && (LabelEdit) && (allowStartEdit) && (!_wasDoubleClick) && (intNumberOfSelectedNodes <= 1))
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{
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// Node should be put in edit mode
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_nodeToStartEditOn = endNode;
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System.Threading.ThreadPool.QueueUserWorkItem(StartEdit);
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}
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}
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}
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else if (((keys & Keys.Control) != 0) && ((keys & Keys.Shift) == 0))
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{
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// CTRL held down
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_selectionMirrorPoint = null;
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if (!IsNodeSelected(endNode))
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{
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switch (_selectionMode)
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{
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case TreeViewSelectionMode.SingleSelect:
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UnselectAllNodesExceptNode(endNode, tva);
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break;
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case TreeViewSelectionMode.MultiSelectSameRootBranch:
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MultiSelectTreeNode tnAbsoluteParent2 = GetRootParent(endNode);
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UnselectAllNodesNotBelongingToParent(tnAbsoluteParent2, tva);
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break;
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case TreeViewSelectionMode.MultiSelectSameLevel:
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UnselectAllNodesNotBelongingToLevel(GetNodeLevel(endNode), tva);
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break;
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case TreeViewSelectionMode.MultiSelectSameLevelAndRootBranch:
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MultiSelectTreeNode tnAbsoluteParent = GetRootParent(endNode);
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UnselectAllNodesNotBelongingToParent(tnAbsoluteParent, tva);
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UnselectAllNodesNotBelongingToLevel(GetNodeLevel(endNode), tva);
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break;
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case TreeViewSelectionMode.MultiSelectSameParent:
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MultiSelectTreeNode tnParent = endNode.Parent;
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UnselectAllNodesNotBelongingDirectlyToParent(tnParent, tva);
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break;
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}
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SelectNode(endNode, true, tva);
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}
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else
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{
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SelectNode(endNode, false, tva);
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}
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}
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else if (((keys & Keys.Control) == 0) && ((keys & Keys.Shift) != 0))
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{
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// SHIFT pressed
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if (_selectionMirrorPoint == null)
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{
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_selectionMirrorPoint = startNode;
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}
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switch (_selectionMode)
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{
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case TreeViewSelectionMode.SingleSelect:
|
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UnselectAllNodesExceptNode(endNode, tva);
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SelectNode(endNode, true, tva);
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break;
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case TreeViewSelectionMode.MultiSelectSameRootBranch:
|
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MultiSelectTreeNode 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)
|
|
{
|
|
MultiSelectTreeNode tnAbsoluteParent = GetRootParent(tnTemp);
|
|
if (tnAbsoluteParent == tnAbsoluteParentStartNode)
|
|
{
|
|
SelectNode(tnTemp, true, tva);
|
|
}
|
|
}
|
|
}
|
|
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStartNode, tva);
|
|
UnselectNodesOutsideRange(_selectionMirrorPoint, 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(_selectionMirrorPoint, endNode, tva);
|
|
break;
|
|
|
|
case TreeViewSelectionMode.MultiSelectSameLevelAndRootBranch:
|
|
MultiSelectTreeNode 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);
|
|
MultiSelectTreeNode tnAbsoluteParent = GetRootParent(tnTemp);
|
|
if ((intNodeLevel == intNodeLevelStart) && (tnAbsoluteParent == tnAbsoluteParentStart))
|
|
{
|
|
SelectNode(tnTemp, true, tva);
|
|
}
|
|
}
|
|
}
|
|
UnselectAllNodesNotBelongingToParent(tnAbsoluteParentStart, tva);
|
|
UnselectAllNodesNotBelongingToLevel(intNodeLevelStart, tva);
|
|
UnselectNodesOutsideRange(_selectionMirrorPoint, endNode, tva);
|
|
break;
|
|
|
|
case TreeViewSelectionMode.MultiSelect:
|
|
SelectNodesInsideRange(_selectionMirrorPoint, endNode, tva);
|
|
UnselectNodesOutsideRange(_selectionMirrorPoint, endNode, tva);
|
|
break;
|
|
|
|
case TreeViewSelectionMode.MultiSelectSameParent:
|
|
MultiSelectTreeNode 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)
|
|
{
|
|
MultiSelectTreeNode tnParent = tnTemp.Parent;
|
|
if (tnParent == tnParentStartNode)
|
|
{
|
|
SelectNode(tnTemp, true, tva);
|
|
}
|
|
}
|
|
}
|
|
UnselectAllNodesNotBelongingDirectlyToParent(tnParentStartNode, tva);
|
|
UnselectNodesOutsideRange(_selectionMirrorPoint, 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:
|
|
MultiSelectTreeNode 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)
|
|
{
|
|
MultiSelectTreeNode 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:
|
|
MultiSelectTreeNode 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);
|
|
MultiSelectTreeNode 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:
|
|
MultiSelectTreeNode 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)
|
|
{
|
|
MultiSelectTreeNode 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();
|
|
}
|
|
|
|
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;
|
|
}
|
|
_internalSelectedNodes.Add(node);
|
|
selected = true;
|
|
_selectionChanged = true;
|
|
OnAfterSelect(new TreeViewEventArgs(node, tva));
|
|
}
|
|
_mostRecentSelectedNode = node;
|
|
return selected;
|
|
}
|
|
if (IsNodeSelected(node))
|
|
{
|
|
OnBeforeDeselect(new TreeViewEventArgs(node));
|
|
_internalSelectedNodes.Remove(node);
|
|
_selectionChanged = true;
|
|
|
|
OnAfterDeselect(new TreeViewEventArgs(node));
|
|
}
|
|
return selected;
|
|
}
|
|
|
|
private void SelectNodesInsideRange(MultiSelectTreeNode startNode, MultiSelectTreeNode endNode, TreeViewAction tva)
|
|
{
|
|
if (startNode != null && endNode != null)
|
|
{
|
|
MultiSelectTreeNode firstNode = null;
|
|
MultiSelectTreeNode lastNode = null;
|
|
if (startNode.Bounds.Y < endNode.Bounds.Y)
|
|
{
|
|
firstNode = startNode;
|
|
lastNode = endNode;
|
|
}
|
|
else
|
|
{
|
|
firstNode = endNode;
|
|
lastNode = startNode;
|
|
}
|
|
SelectNode(firstNode, true, tva);
|
|
MultiSelectTreeNode nextVisibleNode = firstNode;
|
|
while (nextVisibleNode != lastNode && nextVisibleNode != null)
|
|
{
|
|
nextVisibleNode = nextVisibleNode.NextVisibleNode;
|
|
if (nextVisibleNode != null)
|
|
{
|
|
SelectNode(nextVisibleNode, true, tva);
|
|
}
|
|
}
|
|
SelectNode(lastNode, true, tva);
|
|
}
|
|
}
|
|
|
|
private void StartEdit(object state)
|
|
{
|
|
Thread.Sleep(200);
|
|
if (!_wasDoubleClick)
|
|
{
|
|
base.SelectedNode = _nodeToStartEditOn;
|
|
_nodeToStartEditOn.BeginEdit();
|
|
}
|
|
else
|
|
{
|
|
_wasDoubleClick = false;
|
|
}
|
|
}
|
|
|
|
private void UnselectAllNodes(TreeViewAction tva)
|
|
{
|
|
UnselectAllNodesExceptNode(null, tva);
|
|
}
|
|
|
|
private void UnselectAllNodesExceptNode(MultiSelectTreeNode nodeKeepSelected, TreeViewAction tva)
|
|
{
|
|
List<MultiSelectTreeNode> list = new List<MultiSelectTreeNode>();
|
|
|
|
foreach (MultiSelectTreeNode node in _internalSelectedNodes)
|
|
{
|
|
if (nodeKeepSelected == null)
|
|
{
|
|
list.Add(node);
|
|
}
|
|
else if ((nodeKeepSelected != null) && (node != nodeKeepSelected))
|
|
{
|
|
list.Add(node);
|
|
}
|
|
}
|
|
foreach (MultiSelectTreeNode node2 in list)
|
|
{
|
|
SelectNode(node2, false, tva);
|
|
}
|
|
}
|
|
|
|
private void UnselectAllNodesNotBelongingDirectlyToParent(MultiSelectTreeNode parent, TreeViewAction tva)
|
|
{
|
|
ArrayList list = new ArrayList();
|
|
foreach (MultiSelectTreeNode node in _internalSelectedNodes)
|
|
{
|
|
if (node.Parent != parent)
|
|
{
|
|
list.Add(node);
|
|
}
|
|
}
|
|
foreach (MultiSelectTreeNode node2 in list)
|
|
{
|
|
SelectNode(node2, false, tva);
|
|
}
|
|
}
|
|
|
|
private void UnselectAllNodesNotBelongingToLevel(int level, TreeViewAction tva)
|
|
{
|
|
ArrayList list = new ArrayList();
|
|
foreach (MultiSelectTreeNode node in _internalSelectedNodes)
|
|
{
|
|
if (GetNodeLevel(node) != level)
|
|
{
|
|
list.Add(node);
|
|
}
|
|
}
|
|
foreach (MultiSelectTreeNode node2 in list)
|
|
{
|
|
SelectNode(node2, false, tva);
|
|
}
|
|
}
|
|
|
|
private void UnselectAllNodesNotBelongingToParent(MultiSelectTreeNode parent, TreeViewAction tva)
|
|
{
|
|
ArrayList list = new ArrayList();
|
|
foreach (MultiSelectTreeNode node in _internalSelectedNodes)
|
|
{
|
|
if (!IsChildOf(node, parent))
|
|
{
|
|
list.Add(node);
|
|
}
|
|
}
|
|
foreach (MultiSelectTreeNode node2 in list)
|
|
{
|
|
SelectNode(node2, false, tva);
|
|
}
|
|
}
|
|
|
|
private void UnselectNodesOutsideRange(MultiSelectTreeNode startNode, MultiSelectTreeNode endNode, TreeViewAction tva)
|
|
{
|
|
if (startNode != null && endNode != null)
|
|
{
|
|
MultiSelectTreeNode node = null;
|
|
MultiSelectTreeNode node2 = null;
|
|
if (startNode.Bounds.Y < endNode.Bounds.Y)
|
|
{
|
|
node = startNode;
|
|
node2 = endNode;
|
|
}
|
|
else
|
|
{
|
|
node = endNode;
|
|
node2 = startNode;
|
|
}
|
|
MultiSelectTreeNode tn = node;
|
|
while (tn != null)
|
|
{
|
|
tn = tn.PrevVisibleNode;
|
|
if (tn != null)
|
|
{
|
|
SelectNode(tn, false, tva);
|
|
}
|
|
}
|
|
tn = node2;
|
|
while (tn != null)
|
|
{
|
|
tn = tn.NextVisibleNode;
|
|
if (tn != null)
|
|
{
|
|
SelectNode(tn, false, tva);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private void UnselectNodesRecursively(MultiSelectTreeNode tn, TreeViewAction tva)
|
|
{
|
|
SelectNode(tn, false, tva);
|
|
|
|
foreach (MultiSelectTreeNode node in tn.Nodes)
|
|
{
|
|
UnselectNodesRecursively(node, tva);
|
|
}
|
|
}
|
|
|
|
public new MultiSelectTreeNode SelectedNode
|
|
{
|
|
get
|
|
{
|
|
if (SelectedNodes.Count > 0)
|
|
{
|
|
return SelectedNodes[0];
|
|
}
|
|
return null;
|
|
}
|
|
set
|
|
{
|
|
if (value == null)
|
|
{
|
|
if (SelectedNode != null)
|
|
{
|
|
SelectedNodes.Clear();
|
|
}
|
|
}
|
|
else if (SelectedNodes.Count == 1)
|
|
{
|
|
if (SelectedNode != value)
|
|
{
|
|
SelectedNodes.SetContents(new MultiSelectTreeNode[] { value });
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SelectedNodes.SetContents(new MultiSelectTreeNode[] { value });
|
|
}
|
|
}
|
|
}
|
|
|
|
public MultiSelectTreeSelectedNodeCollection SelectedNodes => _selectedNodes;
|
|
|
|
[DefaultValue(TreeViewSelectionMode.SingleSelect)]
|
|
public TreeViewSelectionMode SelectionMode
|
|
{
|
|
get
|
|
{
|
|
return _selectionMode;
|
|
}
|
|
set
|
|
{
|
|
_selectionMode = value;
|
|
}
|
|
}
|
|
|
|
protected override void OnEnabledChanged(EventArgs e)
|
|
{
|
|
base.OnEnabledChanged(e);
|
|
SetEnabled(Nodes, Enabled);
|
|
}
|
|
|
|
private void SetEnabled(MultiSelectTreeNodeCollection nodes, bool enabled)
|
|
{
|
|
foreach (MultiSelectTreeNode node in nodes)
|
|
{
|
|
((IMultiSelectTreeNode)node).SetEnabled(enabled);
|
|
SetEnabled(node.Nodes, enabled);
|
|
}
|
|
}
|
|
|
|
private int ScrollInfo(Win32.ScrollBarConstants fnBar)
|
|
{
|
|
Win32.ScrollInfo si = new Win32.ScrollInfo();
|
|
si.cbSize = (uint)Marshal.SizeOf(si);
|
|
si.fMask = (int)Win32.ScrollInfoMask.SIF_POS;
|
|
if (!Win32.GetScrollInfo(Handle, (int)fnBar, ref si))
|
|
return 0;
|
|
|
|
return si.nPos;
|
|
}
|
|
|
|
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
|
|
public int HScrollPos
|
|
{
|
|
get
|
|
{
|
|
return ScrollInfo(Win32.ScrollBarConstants.SB_HORZ);
|
|
}
|
|
set
|
|
{
|
|
Win32.SendMessage(Handle, Win32.WM_HSCROLL, (IntPtr)(((int)Win32.ScrollBarCommands.SB_THUMBPOSITION) | (value << 16)), (IntPtr)0);
|
|
}
|
|
}
|
|
|
|
[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
|
|
public int VScrollPos
|
|
{
|
|
get
|
|
{
|
|
return ScrollInfo(Win32.ScrollBarConstants.SB_VERT);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Iterates through every node of this <see cref="MultiSelectTreeView"/>.
|
|
/// </summary>
|
|
public IEnumerable<MultiSelectTreeNode> AllNodes
|
|
{
|
|
get
|
|
{
|
|
foreach (MultiSelectTreeNode node in Nodes)
|
|
{
|
|
yield return node;
|
|
|
|
foreach (MultiSelectTreeNode n in node.Descendants)
|
|
{
|
|
yield return n;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
protected override void OnHandleCreated(EventArgs e)
|
|
{
|
|
base.OnHandleCreated(e);
|
|
|
|
foreach (MultiSelectTreeNode node in AllNodes)
|
|
{
|
|
UpdateCheckboxVisibility(node);
|
|
}
|
|
}
|
|
|
|
public void UpdateCheckboxVisibility(MultiSelectTreeNode treeNode)
|
|
{
|
|
if (CheckBoxes && treeNode.Handle != IntPtr.Zero && Handle != IntPtr.Zero)
|
|
{
|
|
NativeMethods.TVITEM tvItem = new NativeMethods.TVITEM();
|
|
tvItem.hItem = treeNode.Handle;
|
|
tvItem.mask = NativeMethods.TVIF_STATE;
|
|
tvItem.stateMask = NativeMethods.TVIS_STATEIMAGEMASK;
|
|
tvItem.state = 0;
|
|
|
|
if (treeNode.ShowCheckBox && treeNode.Checked)
|
|
{
|
|
tvItem.state = 2 << 12;
|
|
}
|
|
else if (treeNode.ShowCheckBox)
|
|
{
|
|
tvItem.state = 1 << 12;
|
|
}
|
|
|
|
IntPtr lparam = Marshal.AllocHGlobal(Marshal.SizeOf(tvItem));
|
|
Marshal.StructureToPtr(tvItem, lparam, false);
|
|
Win32.SendMessage(Handle, NativeMethods.TVM_SETITEM, IntPtr.Zero, lparam);
|
|
}
|
|
}
|
|
|
|
#region NativeMethods class
|
|
|
|
private class NativeMethods
|
|
{
|
|
public const int TVIF_STATE = 0x8;
|
|
public const int TVIS_STATEIMAGEMASK = 0xF000;
|
|
public const int TV_FIRST = 0x1100;
|
|
public const int TVM_SETITEM = TV_FIRST + 63;
|
|
|
|
public struct TVITEM
|
|
{
|
|
#pragma warning disable 0649, 414, 169
|
|
public int mask;
|
|
public IntPtr hItem;
|
|
public int state;
|
|
public int stateMask;
|
|
[MarshalAs(UnmanagedType.LPTStr)]
|
|
public String lpszText;
|
|
public int cchTextMax;
|
|
public int iImage;
|
|
public int iSelectedImage;
|
|
public int cChildren;
|
|
public IntPtr lParam;
|
|
#pragma warning restore 0649, 414, 169
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|