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MyTreeListNode.cs
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MyTreeListNode.cs
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using System;
using System.Windows.Forms;
using System.Collections.Generic;
using DevExpress.XtraTreeList.Nodes;
using System.Drawing;
using DevExpress.XtraEditors.Controls;
namespace DevExpress.MyControl
{
public enum MyNodeAction {Nothing, Add, Remove};
public class MyTreeListNode : TreeListNode
{
private MyToolButtonCollection buttons;
private const int INTERVALbutton = 3;
private MyToolButton focusedButton;
private Size avatarSize;
private const int AVATARCaptionWidth = 46;
protected internal MyTreeListNode(int id, TreeListNodes owner)
: base(id, owner)
{
isPosted = false;
buttons = CreateButtonCollection();
UpdateButtons();
SelectImageIndex = 0;
avatarSize = new Size(20, 25);
avatarImageBounds = Rectangle.Empty;
avatarCaptionBounds = Rectangle.Empty;
}
private Rectangle avatarImageBounds;
public Rectangle AvatarImageBounds
{
get
{
return avatarImageBounds;
}
}
private Rectangle avatarCaptionBounds;
public Rectangle AvatarCaptionBounds
{
get
{
return avatarCaptionBounds;
}
}
private bool isPosted;
internal bool IsPosted
{
get
{
return isPosted;
}
set
{
if (isPosted == value) return;
isPosted = value;
UpdateButtons();
TreeList.LayoutChanged();
}
}
public MyToolButtonCollection Buttons
{
get
{
return buttons;
}
}
protected virtual MyToolButtonCollection CreateButtonCollection()
{
return new MyToolButtonCollection();
}
protected virtual void UpdateButtons()
{
focusedButton = null;
Buttons.Clear();
if (!IsPosted)
{
Buttons.Add(new MyToolButton(MyButtonType.Cancel));
Buttons.Add(new MyToolButton(MyButtonType.Commit));
}
else Buttons.Add(new MyToolButton(MyButtonType.Link));
}
public int Interval
{
get
{
return INTERVALbutton;
}
}
public virtual void HitTest(Point pt)
{
if (focusedButton != null)
{
if (focusedButton.ViewInfo.Bounds.Contains(pt)) return;
focusedButton.ViewInfo.UnderCursor = false;
InvalidateButton(focusedButton);
focusedButton = null;
}
MyToolButton btn;
for (int i = 0; i < Buttons.Count; i++)
{
btn = Buttons[i];
if (btn.ViewInfo.Bounds.Contains(pt))
{
btn.ViewInfo.UnderCursor = true;
focusedButton = btn;
InvalidateButton(focusedButton);
break;
}
}
}
protected virtual void InvalidateButton(MyToolButton btn)
{
TreeList.Invalidate(btn.ViewInfo.Bounds);
}
internal MyNodeAction MouseDownAction(MouseEventArgs e)
{
MyNodeAction res = MyNodeAction.Nothing;
if (e.Button != MouseButtons.Left || focusedButton == null) return res;
switch (focusedButton.ButtonType)
{
case MyButtonType.Link:
{
res = MyNodeAction.Add;
break;
}
case MyButtonType.Cancel:
{
res = MyNodeAction.Remove;
break;
}
case MyButtonType.Commit:
{
IsPosted = true;
res = MyNodeAction.Nothing;
break;
}
}
return res;
}
internal void CalcAvatarBounds(Rectangle rect)
{
avatarImageBounds = new Rectangle(new Point((rect.Width - avatarSize.Width) / 2 + rect.X, rect.Y + 2), avatarSize);
avatarCaptionBounds = new Rectangle(new Point((rect.Width - AVATARCaptionWidth) / 2 + rect.X, avatarImageBounds.Bottom + 2), new Size(AVATARCaptionWidth, rect.Bottom - avatarImageBounds.Bottom));
}
public string AvatarCaption
{
get
{
MyTreeList mtl = TreeList as MyTreeList;
if (mtl.AvatarCaptionFieldName == string.Empty) return string.Empty;
return GetValue(TreeList.Columns[mtl.AvatarCaptionFieldName].AbsoluteIndex) as string;
}
}
public Image AvatarImage
{
get
{
return GetImage();
}
}
protected virtual Image GetImage()
{
Image img = null;
MyTreeList mtl = TreeList as MyTreeList;
if (mtl.AvatarImageFieldName == string.Empty) return img;
try
{
DevExpress.XtraTreeList.Columns.TreeListColumn col = TreeList.Columns[mtl.AvatarImageFieldName];
byte[] buffer = (byte[])GetValue(TreeList.Columns.IndexOf(col));
img = ByteImageConverter.FromByteArray(buffer);
}
catch
{
img = null;
}
return img;
}
}
}