/// <summary>
/// Initializes a new instance of the <see cref="ShellTreeView"/> class.
/// </summary>
public ShellTreeView()
{
m_TreeView = new TreeViewBase();
m_TreeView.Dock = DockStyle.Fill;
m_TreeView.BackColor = Color.White;
m_TreeView.HideSelection = false;
m_TreeView.HotTracking = true;
m_TreeView.Parent = this;
m_TreeView.ShowRootLines = false;
m_TreeView.AfterSelect += new TreeViewEventHandler(m_TreeView_AfterSelect);
m_TreeView.BeforeExpand += new TreeViewCancelEventHandler(m_TreeView_BeforeExpand);
m_TreeView.ItemDrag += new ItemDragEventHandler(m_TreeView_ItemDrag);
m_TreeView.MouseDown += new MouseEventHandler(m_TreeView_MouseDown);
m_TreeView.MouseUp += new MouseEventHandler(m_TreeView_MouseUp);
m_TreeView.BorderStyle = BorderStyle.None;
m_ScrollTimer.Interval = 250;
m_ScrollTimer.Tick += new EventHandler(m_ScrollTimer_Tick);
Size = new System.Drawing.Size(120, 100);
SystemImageList.UseSystemImageList(m_TreeView);
m_ShellListener.DriveAdded += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.DriveRemoved += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.FolderCreated += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.FolderDeleted += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.FolderRenamed += new ShellItemChangeEventHandler(m_ShellListener_ItemRenamed);
m_ShellListener.FolderUpdated += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.ItemCreated += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.ItemDeleted += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.ItemRenamed += new ShellItemChangeEventHandler(m_ShellListener_ItemRenamed);
m_ShellListener.ItemUpdated += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
m_ShellListener.SharingChanged += new ShellItemEventHandler(m_ShellListener_ItemUpdated);
// Setting AllowDrop to true then false makes sure OleInitialize()
// is called for the thread: it must be called before we can use
// RegisterDragDrop. There is probably a neater way of doing this.
m_TreeView.AllowDrop = true;
m_TreeView.AllowDrop = false;
this.DoubleBuffered = true;
SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
CreateItems();
}
void m_Combo_DrawItem(object sender, DrawItemEventArgs e)
{
int iconWidth = SystemInformation.SmallIconSize.Width;
int indent = ((e.State & DrawItemState.ComboBoxEdit) == 0) ? (iconWidth / 2) : 0;
if (e.Index != -1)
{
string display;
ComboItem item = (ComboItem)m_Combo.Items[e.Index];
Color textColor = SystemColors.WindowText;
Rectangle textRect;
int textOffset;
SizeF size;
if ((e.State & DrawItemState.ComboBoxEdit) != 0)
{
// Don't draw the folder location in the edit box when
// the control is Editable as the edit control will
// take care of that.
display = m_Editable ? string.Empty : GetEditString();
}
else
{
display = item.Folder.DisplayName;
}
size = TextRenderer.MeasureText(display, m_Combo.Font);
textRect = new Rectangle(e.Bounds.Left + iconWidth + (item.Indent * indent) + 3, e.Bounds.Y, (int)size.Width, e.Bounds.Height);
textOffset = (int)((e.Bounds.Height - size.Height) / 2);
// If the text is being drawin in the main combo box edit area,
// draw the text 1 pixel higher - this is how it looks in Windows.
if ((e.State & DrawItemState.ComboBoxEdit) != 0)
{
textOffset -= 1;
}
if ((e.State & DrawItemState.Selected) != 0)
{
e.Graphics.FillRectangle(SystemBrushes.Highlight, textRect);
textColor = SystemColors.HighlightText;
}
else
{
e.DrawBackground();
}
if ((e.State & DrawItemState.Focus) != 0)
{
ControlPaint.DrawFocusRectangle(e.Graphics, textRect);
}
SystemImageList.DrawSmallImage(
e.Graphics,
new Point(e.Bounds.Left + (item.Indent * indent), e.Bounds.Top),
item.Folder.GetSystemImageListIndex(ShellIconType.SmallIcon,
ShellIconFlags.OverlayIndex),
(e.State & DrawItemState.Selected) != 0
);
TextRenderer.DrawText(e.Graphics, display, m_Combo.Font, new Point(textRect.Left, textRect.Top + textOffset), textColor);
}
}
