//---------------------------------------------------------------------
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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//THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY
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//KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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//IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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//PARTICULAR PURPOSE.
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//---------------------------------------------------------------------
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using System;
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using System.Windows.Forms;
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using System.Drawing;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.ComponentModel;
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using System.ComponentModel.Design;
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using System.ComponentModel.Design.Serialization;
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using System.Drawing.Design;
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using System.Text;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls
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{
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[
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ToolboxItem(false),
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DesignTimeVisible(false)
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]
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public class TreeGridNode : DataGridViewRow//, IComponent
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{
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internal TreeGridView _grid;
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internal TreeGridNode _parent;
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internal TreeGridNodeCollection _owner;
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internal bool IsExpanded;
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internal bool IsRoot;
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internal bool _isSited;
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internal bool _isFirstSibling;
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internal bool _isLastSibling;
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internal Image _image;
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internal int _imageIndex;
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private Random rndSeed = new Random();
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public int UniqueValue = -1;
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TreeGridCell _treeCell;
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TreeGridNodeCollection childrenNodes;
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private int _index;
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private int _level;
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private bool childCellsCreated = false;
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// needed for IComponent
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private ISite site = null;
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private EventHandler disposed = null;
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internal TreeGridNode(TreeGridView owner)
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: this()
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{
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this._grid = owner;
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this.IsExpanded = true;
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}
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public TreeGridNode()
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{
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_index = -1;
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_level = -1;
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IsExpanded = false;
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UniqueValue = this.rndSeed.Next();
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_isSited = false;
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_isFirstSibling = false;
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_isLastSibling = false;
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_imageIndex = -1;
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}
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public override object Clone()
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{
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TreeGridNode r = (TreeGridNode)base.Clone();
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r.UniqueValue = -1;
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r._level = this._level;
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r._grid = this._grid;
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r._parent = this.Parent;
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r._imageIndex = this._imageIndex;
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if (r._imageIndex == -1)
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r.Image = this.Image;
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r.IsExpanded = this.IsExpanded;
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//r.treeCell = new TreeGridCell();
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return r;
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}
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internal protected virtual void UnSited()
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{
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// This row is being removed from being displayed on the grid.
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TreeGridCell cell;
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foreach (DataGridViewCell DGVcell in this.Cells)
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{
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cell = DGVcell as TreeGridCell;
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if (cell != null)
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{
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cell.UnSited();
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}
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}
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this._isSited = false;
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}
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internal protected virtual void Sited()
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{
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// This row is being added to the grid.
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this._isSited = true;
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this.childCellsCreated = true;
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Debug.Assert(this._grid != null);
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TreeGridCell cell;
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foreach (DataGridViewCell DGVcell in this.Cells)
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{
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cell = DGVcell as TreeGridCell;
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if (cell != null)
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{
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cell.Sited();// Level = this.Level;
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}
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}
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}
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// Represents the index of this row in the Grid
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[System.ComponentModel.Description("Represents the index of this row in the Grid. Advanced usage."),
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System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced),
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int RowIndex{
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get{
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return base.Index;
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}
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}
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// Represents the index of this row based upon its position in the collection.
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[Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new int Index
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{
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get
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{
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if (_index == -1)
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{
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// get the index from the collection if unknown
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_index = this._owner.IndexOf(this);
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}
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return _index;
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}
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internal set
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{
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_index = value;
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}
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}
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[Browsable(false),
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EditorBrowsable( EditorBrowsableState.Never),
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DesignerSerializationVisibility( DesignerSerializationVisibility.Hidden)]
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public ImageList ImageList
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{
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get
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{
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if (this._grid != null)
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return this._grid.ImageList;
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else
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return null;
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}
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}
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private bool ShouldSerializeImageIndex()
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{
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return (this._imageIndex != -1 && this._image == null);
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}
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[Category("Appearance"),
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Description("..."), DefaultValue(-1),
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TypeConverter(typeof(ImageIndexConverter)),
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Editor("System.Windows.Forms.Design.ImageIndexEditor", typeof(UITypeEditor))]
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public int ImageIndex
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{
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get { return _imageIndex; }
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set
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{
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_imageIndex = value;
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if (_imageIndex != -1)
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{
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// when a imageIndex is provided we do not store the image.
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this._image = null;
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}
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if (this._isSited)
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{
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// when the image changes the cell's style must be updated
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this._treeCell.UpdateStyle();
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if (this.Displayed)
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this._grid.InvalidateRow(this.RowIndex);
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}
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}
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}
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private bool ShouldSerializeImage()
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{
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return (this._imageIndex == -1 && this._image != null);
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}
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public Image Image
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{
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get {
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if (_image == null && _imageIndex != -1)
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{
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if (this.ImageList != null && this._imageIndex < this.ImageList.Images.Count)
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{
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// get image from image index
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return this.ImageList.Images[this._imageIndex];
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}
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else
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return null;
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}
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else
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{
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// image from image property
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return this._image;
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};
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}
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set
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{
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_image = value;
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if (_image != null)
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{
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// when a image is provided we do not store the imageIndex.
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this._imageIndex = -1;
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}
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if (this._isSited)
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{
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// when the image changes the cell's style must be updated
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this._treeCell.UpdateStyle();
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if (this.Displayed)
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this._grid.InvalidateRow(this.RowIndex);
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}
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}
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}
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protected override DataGridViewCellCollection CreateCellsInstance()
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{
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DataGridViewCellCollection cells = base.CreateCellsInstance();
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cells.CollectionChanged += cells_CollectionChanged;
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return cells;
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}
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void cells_CollectionChanged(object sender, System.ComponentModel.CollectionChangeEventArgs e)
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{
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// Exit if there already is a tree cell for this row
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if (_treeCell != null) return;
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if (e.Action == System.ComponentModel.CollectionChangeAction.Add || e.Action == System.ComponentModel.CollectionChangeAction.Refresh)
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{
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TreeGridCell treeCell = null;
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if (e.Element == null)
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{
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foreach (DataGridViewCell cell in base.Cells)
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{
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if (cell.GetType().IsAssignableFrom(typeof(TreeGridCell)))
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{
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treeCell = (TreeGridCell)cell;
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break;
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}
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}
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}
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else
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{
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treeCell = e.Element as TreeGridCell;
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}
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if (treeCell != null)
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_treeCell = treeCell;
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}
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}
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[Category("Data"),
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Description("The collection of root nodes in the treelist."),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
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Editor(typeof(CollectionEditor), typeof(UITypeEditor))]
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public TreeGridNodeCollection Nodes
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{
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get
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{
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if (childrenNodes == null)
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{
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childrenNodes = new TreeGridNodeCollection(this);
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}
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return childrenNodes;
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}
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set { ;}
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}
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// Create a new Cell property because by default a row is not in the grid and won't
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// have any cells. We have to fabricate the cell collection ourself.
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[Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new DataGridViewCellCollection Cells
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{
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get
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{
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if (!childCellsCreated && this.DataGridView == null)
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{
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if (this._grid == null) return null;
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this.CreateCells(this._grid);
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childCellsCreated = true;
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}
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return base.Cells;
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}
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}
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[Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int Level
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{
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get {
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if (this._level == -1)
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{
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// calculate level
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int walk = 0;
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TreeGridNode walkRow = this.Parent;
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while (walkRow != null)
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{
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walk++;
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walkRow = walkRow.Parent;
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}
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this._level = walk;
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}
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return this._level; }
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}
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[Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public TreeGridNode Parent
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{
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get
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{
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return this._parent;
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}
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}
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[Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public virtual bool HasChildren
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{
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get
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{
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return (this.childrenNodes != null && this.Nodes.Count != 0);
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}
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}
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[Browsable(false)]
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public bool IsSited
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{
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get
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{
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return this._isSited;
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}
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}
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[Browsable(false)]
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public bool IsFirstSibling
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{
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get
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{
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return (this.Index == 0);
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}
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}
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[Browsable(false)]
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public bool IsLastSibling
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{
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get
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{
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TreeGridNode parent = this.Parent;
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if (parent != null && parent.HasChildren)
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{
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return (this.Index == parent.Nodes.Count - 1);
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}
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else
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return true;
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}
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}
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public virtual bool Collapse()
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{
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return this._grid.CollapseNode(this);
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}
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public virtual bool Expand()
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{
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if (this._grid != null)
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return this._grid.ExpandNode(this);
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else
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{
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this.IsExpanded = true;
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return true;
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}
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}
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internal protected virtual bool InsertChildNode(int index, TreeGridNode node)
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{
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node._parent = this;
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node._grid = this._grid;
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// ensure that all children of this node has their grid set
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if (this._grid != null)
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UpdateChildNodes(node);
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//TODO: do we need to use index parameter?
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if ((this._isSited || this.IsRoot) && this.IsExpanded)
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this._grid.SiteNode(node);
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return true;
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}
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internal protected virtual bool InsertChildNodes(int index, params TreeGridNode[] nodes)
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{
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foreach (TreeGridNode node in nodes)
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{
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this.InsertChildNode(index, node);
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}
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return true;
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}
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internal protected virtual bool AddChildNode(TreeGridNode node)
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{
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node._parent = this;
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node._grid = this._grid;
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// ensure that all children of this node has their grid set
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if (this._grid != null)
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UpdateChildNodes(node);
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if ((this._isSited || this.IsRoot) && this.IsExpanded && !node._isSited)
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this._grid.SiteNode(node);
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return true;
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}
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internal protected virtual bool AddChildNodes(params TreeGridNode[] nodes)
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{
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//TODO: Convert the final call into an SiteNodes??
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foreach (TreeGridNode node in nodes)
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{
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this.AddChildNode(node);
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}
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return true;
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}
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internal protected virtual bool RemoveChildNode(TreeGridNode node)
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{
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if ((this.IsRoot || this._isSited) && this.IsExpanded )
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{
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//We only unsite out child node if we are sited and expanded.
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this._grid.UnSiteNode(node);
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}
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node._grid = null;
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node._parent = null;
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return true;
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}
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internal protected virtual bool ClearNodes()
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{
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if (this.HasChildren)
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{
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for (int i = this.Nodes.Count - 1; i >= 0; i--)
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{
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this.Nodes.RemoveAt(i);
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}
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}
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return true;
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}
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[
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Browsable(false),
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EditorBrowsable(EditorBrowsableState.Advanced)
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]
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public event EventHandler Disposed
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{
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add
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{
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this.disposed += value;
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}
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remove
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{
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this.disposed -= value;
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}
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}
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[
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Browsable(false),
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DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
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]
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public ISite Site
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{
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get
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{
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return this.site;
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}
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set
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{
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this.site = value;
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}
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}
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private void UpdateChildNodes(TreeGridNode node)
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{
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if (node.HasChildren)
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{
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foreach (TreeGridNode childNode in node.Nodes)
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{
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childNode._grid = node._grid;
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this.UpdateChildNodes(childNode);
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}
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}
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}
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public override string ToString()
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{
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StringBuilder sb = new StringBuilder(36);
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sb.Append("TreeGridNode { Index=");
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sb.Append(this.RowIndex.ToString(System.Globalization.CultureInfo.CurrentCulture));
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sb.Append(" }");
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return sb.ToString();
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}
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//protected override void Dispose(bool disposing) {
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// if (disposing)
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// {
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// lock(this)
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// {
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// if (this.site != null && this.site.Container != null)
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// {
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// this.site.Container.Remove(this);
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// }
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// if (this.disposed != null)
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// {
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// this.disposed(this, EventArgs.Empty);
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// }
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// }
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// }
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// base.Dispose(disposing);
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//}
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}
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}
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