public TreeNode GetNodeAt(TreeView treeView, Point point)
{
TVHITTESTINFO hti = new TVHITTESTINFO();
hti.pt = new POINT(point);
Win32Declarations.SendMessage(treeView.Handle, TreeViewMessage.TVM_HITTEST, 0, ref hti);
if ((hti.flags & TreeViewHitTestFlags.ONITEM) != 0)
{
return(TreeNode.FromHandle(treeView, hti.hItem));
}
if ((hti.flags & TreeViewHitTestFlags.ONITEMRIGHT) != 0)
{
using (Graphics g = treeView.CreateGraphics())
{
IntPtr hdc = g.GetHdc();
try
{
TreeNode node = TreeNode.FromHandle(treeView, hti.hItem);
int offset = CalculateOffset(node);
Rectangle content = CalculateContentRectangle(node, hdc, offset);
if (content.Contains(point))
{
return(node);
}
}
finally
{
g.ReleaseHdc(hdc);
}
}
}
return(null);
}
private void HandleClick(Point pt, Keys modifierKeys)
{
IShellItem item = null;
try {
TVHITTESTINFO structure = new TVHITTESTINFO {
pt = pt
};
IntPtr wParam = PInvoke.SendMessage(treeController.Handle, 0x1111, IntPtr.Zero, ref structure);
if (wParam != IntPtr.Zero)
{
if ((structure.flags & 0x10) == 0 && (structure.flags & 0x80) == 0)
{
treeControl.HitTest(pt, out item);
if (item != null)
{
IntPtr pidl;
if (PInvoke.SHGetIDListFromObject(item, out pidl) == 0)
{
using (IDLWrapper wrapper = new IDLWrapper(pidl)) {
TreeViewMiddleClicked(wrapper, modifierKeys);
}
}
}
}
}
}
finally {
if (item != null)
{
Marshal.ReleaseComObject(item);
}
}
}
protected void TreeControl_MouseUp(object sender, MouseEventArgs e)
{
try
{
// Show menu only if the right mouse button is clicked.
// Point where the mouse is clicked.
Point p = new Point(e.X, e.Y);
// Get the node that the user has clicked.
TreeNode node = GetNodeAt(p);
if (node != null)
{
TVHITTESTINFO ht = new TVHITTESTINFO();
ht.pt = e.Location;
SendMessage(this.Handle, TVM_HITTEST, IntPtr.Zero, ref ht);
// Select the node the user has clicked.
// The node appears selected until the menu is displayed on the screen.
m_OldSelectNode = SelectedNode;
SelectedNode = node;
if (e.Button == MouseButtons.Right)
{
IEnumerable <ToolStripItem> items = MakeContextMenu(node);
if (items != null)
{
treeContextMenu.Items.Clear();
foreach (var i in items)
{
treeContextMenu.Items.Add(i);
}
treeContextMenu.Show(this, p);
}
}
else
{
if (ht.flags == 16)//todo
{
//Clicked on a ExpandOrCollapse button
//- срабатывает не всегда
//todo итем всё равно выделяется
}
else
{
OnItemSelected();
}
}
}
}
catch (Exception ex)
{
Log.ShowError(ex);
}
}
TVHITTESTINFO HitTest(Point p)
{
TVHITTESTINFO htInfo = new TVHITTESTINFO();
htInfo.pt = p;
if (m_HitTestData == IntPtr.Zero)
{
m_HitTestData = Marshal.AllocHGlobal(Marshal.SizeOf(htInfo));
}
Marshal.StructureToPtr(htInfo, m_HitTestData, true); //Save to unmanaged memory
WindowsAPI.SendMessage(Handle, (int)TreeViewMessages.TVM_HITTEST, IntPtr.Zero, m_HitTestData);
htInfo = (TVHITTESTINFO)Marshal.PtrToStructure(m_HitTestData, htInfo.GetType()); //Load from unmanaged memory
return(htInfo);
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (myThreeStateCheckboxes)
{
bool doubleClick = false;
if (myLastMouseUpPoint.X != -1)
{
if (Math.Abs(e.X - myLastMouseUpPoint.X) <= SystemInformation.DoubleClickSize.Width &&
Math.Abs(e.Y - myLastMouseUpPoint.Y) <= SystemInformation.DoubleClickSize.Height)
{
TimeSpan ts = DateTime.Now - myLastMouseUpTime;
if (ts.TotalMilliseconds <= SystemInformation.DoubleClickTime)
{
doubleClick = true;
}
}
}
myLastMouseUpPoint = new Point(e.X, e.Y);
myLastMouseUpTime = DateTime.Now;
if (doubleClick)
{
return;
}
TVHITTESTINFO hti = new TVHITTESTINFO();
hti.pt = new POINT(e.X, e.Y);
Win32Declarations.SendMessage(Handle, TreeViewMessage.TVM_HITTEST, 0, ref hti);
if ((hti.flags & TreeViewHitTestFlags.ONITEMSTATEICON) != 0)
{
TreeNode node = TreeNode.FromHandle(this, hti.hItem);
NodeCheckState state = GetNodeCheckState(node);
if (state == NodeCheckState.Checked || state == NodeCheckState.Grayed)
{
state = NodeCheckState.Unchecked;
}
else
{
state = NodeCheckState.Checked;
}
ChangeNodeCheckState(node, state);
}
}
}
private TriStateTreeNode GetTreeNodeHitAtCheckBoxByClientPosition(int iXClientPos, int iYClientPos)
{
//Get the hit info
TVHITTESTINFO tvHitTestInfo = new TVHITTESTINFO();
tvHitTestInfo.pt.x = iXClientPos;
tvHitTestInfo.pt.y = iYClientPos;
IntPtr ptrTreeNode = SendMessage(this.Handle, TVM_HITTEST, 0, ref tvHitTestInfo);
//Check if it has clicked on an item
if (ptrTreeNode != null)
{
//Check if it has clicked on the state image of the item
if ((tvHitTestInfo.flags & TVHT_ONITEMSTATEICON) != 0)
{
return((TriStateTreeNode)TriStateTreeNode.FromHandle(this, ptrTreeNode));
}
}
return(null);
}
/// <summary>
/// Get treenode by client position
/// </summary>
/// <param name="x">x position in client</param>
/// <param name="y">y position in client</param>
/// <returns></returns>
private TreeNode GetTreeNodeHitAtCheckBoxByClientPosition(int x, int y)
{
TreeNode treeNode = null;
UInt32 iTreeNodeHandle;
TVHITTESTINFO tTVHITTESTINFO = new TVHITTESTINFO();
// Get the hit info
tTVHITTESTINFO.pt.x = x;
tTVHITTESTINFO.pt.y = y;
iTreeNodeHandle = SendMessage(this.Handle, TVM_HITTEST, 0, ref tTVHITTESTINFO);
// Check if it has clicked on an item
if (iTreeNodeHandle != 0)
{
// Check if it has clicked on the state image of the item
if ((tTVHITTESTINFO.flags & TVHT_ONITEMSTATEICON) != 0)
{
treeNode = TreeNode.FromHandle(this, new IntPtr(iTreeNodeHandle));
}
}
return(treeNode);
}
private void HandleClick(Point pt)
{
IShellItem item = null;
IntPtr ptr = IntPtr.Zero;
try {
TVHITTESTINFO structure = new TVHITTESTINFO {
pt = pt
};
ptr = Marshal.AllocHGlobal(Marshal.SizeOf(structure));
Marshal.StructureToPtr(structure, ptr, false);
IntPtr wParam = PInvoke.SendMessage(treeController.Handle, 0x1111, IntPtr.Zero, ptr);
if (wParam != IntPtr.Zero)
{
structure = (TVHITTESTINFO)Marshal.PtrToStructure(ptr, typeof(TVHITTESTINFO));
if ((structure.flags & 0x10) == 0 && (structure.flags & 0x80) == 0)
{
treeControl.HitTest(pt, out item);
if (item != null)
{
TreeViewMiddleClicked(item);
}
}
}
}
finally {
if (item != null)
{
Marshal.ReleaseComObject(item);
}
if (ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr);
}
}
}
public extern static int SendMessage(IntPtr hwnd, uint msg, uint wParam, ref TVHITTESTINFO lParam);
private static extern UInt32 SendMessage(IntPtr hWnd, UInt32 msg,
UInt32 wParam, ref TVHITTESTINFO lParam);
/// <summary>
/// 現在のマウス選択位置のアイテムを取得。
/// </summary>
/// <returns>現在のマウス選択位置のアイテム。</returns>
private IntPtr GetCurrentMousePosItem()
{
TVHITTESTINFO info = new TVHITTESTINFO();
info.pt.X = Control.MousePosition.X;
info.pt.Y = Control.MousePosition.Y;
NativeMethods.ScreenToClient(WindowHandle, ref info.pt);
return NativeMethods.SendMessage(WindowHandle, NativeTree.TVM_HITTEST, IntPtr.Zero, ref info);
}
public static extern IntPtr SendMessage(IntPtr hwnd, int msg, int wparam, ref TVHITTESTINFO lparam);
private TriStateTreeNode GetTreeNodeHitAtCheckBoxByClientPosition(int iXClientPos, int iYClientPos)
{
//Get the hit info
TVHITTESTINFO tvHitTestInfo = new TVHITTESTINFO();
tvHitTestInfo.pt.x = iXClientPos;
tvHitTestInfo.pt.y = iYClientPos;
IntPtr ptrTreeNode = SendMessage(this.Handle, TVM_HITTEST, 0, ref tvHitTestInfo);
//Check if it has clicked on an item
if (ptrTreeNode != null)
{
//Check if it has clicked on the state image of the item
if ((tvHitTestInfo.flags & TVHT_ONITEMSTATEICON) != 0)
return (TriStateTreeNode)TriStateTreeNode.FromHandle(this, ptrTreeNode);
}
return null;
}
private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, ref TVHITTESTINFO lParam);
public static extern int SendMessage(
IntPtr hwnd, uint msg, uint wParam, ref TVHITTESTINFO lParam);
protected override void WndProc(ref Message message)
{
bool oldLabelEdit = LabelEdit;
switch (message.Msg)
{
case (int)Msg.WM_LBUTTONDOWN:
POINT p = new POINT((int)message.LParam);
TVHITTESTINFO ht = HitTest(p);
if (ht.hItem != IntPtr.Zero && !m_SelectedItems.Contains((int)ht.hItem))
{
LabelEdit = false;
SelectTreeItem(ht.hItem);
}
break;
// Reflected Messages come from the treeview control itself
case (int)ReflectedMessages.OCM_NOTIFY:
NMHDR nm2 = (NMHDR)message.GetLParam(typeof(NMHDR));
switch (nm2.code)
{
case (int)NotificationMessages.NM_CUSTOMDRAW:
base.WndProc(ref message);
NotifyTreeCustomDraw(ref message);
return;
case (int)TreeViewNotification.TVN_DeleteItem:
NMTREEVIEW tv = (NMTREEVIEW)message.GetLParam(typeof(NMTREEVIEW));
if (m_SelectedItems.Contains((int)tv.itemOld.hItem))
{
m_SelectedItems.Remove((int)tv.itemOld.hItem);
m_selectionChanged = true;
OnSelectionChanged();
}
break;
case (int)TreeViewNotification.TVN_SelectionChanged:
NMTREEVIEW tv1 = (NMTREEVIEW)message.GetLParam(typeof(NMTREEVIEW));
int hItem = (int)tv1.itemNew.hItem;
if ((WindowsAPI.GetKeyState((int)VirtualKeys.VK_SHIFT) | 1) != 1)
{
if (!m_SelectedItems.Contains(hItem))
{
m_SelectedItems.Add(hItem);
}
else
{
m_SelectedItems.Remove(hItem);
}
}
else if ((WindowsAPI.GetKeyState((int)VirtualKeys.VK_CONTROL) | 1) != 1)
{
if (!m_SelectedItems.Contains(hItem))
{
m_SelectedItems.Add(hItem);
}
else
{
m_SelectedItems.Remove(hItem);
}
}
else
{
bool bFullInvalidate = m_SelectedItems.Count > 1;
m_SelectedItems.Clear();
m_SelectedItems.Add(hItem);
if (bFullInvalidate)
{
Invalidate();
}
}
m_selectionChanged = true;
OnSelectionChanged();
break;
default:
break;
}
break;
default:
break;
}
base.WndProc(ref message);
LabelEdit = oldLabelEdit;
}
public static extern IntPtr SendMessage(IntPtr hwnd, int msg, int wparam, ref TVHITTESTINFO lparam);
internal static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, ref TVHITTESTINFO lParam);
