public TreeViewHitTestInfo HitTest(int x, int y)
{
System.Windows.Forms.NativeMethods.TV_HITTESTINFO lParam = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO {
pt_x = x,
pt_y = y
};
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, lParam);
TreeNode hitNode = (handle == IntPtr.Zero) ? null : this.NodeFromHandle(handle);
return new TreeViewHitTestInfo(hitNode, (TreeViewHitTestLocations) lParam.flags);
}
protected override void OnMouseHover(EventArgs e)
{
System.Windows.Forms.NativeMethods.TV_HITTESTINFO lParam = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO();
Point position = Cursor.Position;
position = base.PointToClientInternal(position);
lParam.pt_x = position.X;
lParam.pt_y = position.Y;
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, lParam);
if ((handle != IntPtr.Zero) && ((lParam.flags & 70) != 0))
{
TreeNode node = this.NodeFromHandle(handle);
if ((node != this.prevHoveredNode) && (node != null))
{
this.OnNodeMouseHover(new TreeNodeMouseHoverEventArgs(node));
this.prevHoveredNode = node;
}
}
if (!this.hoveredAlready)
{
base.OnMouseHover(e);
this.hoveredAlready = true;
}
base.ResetMouseEventArgs();
}
public TreeNode GetNodeAt(int x, int y)
{
System.Windows.Forms.NativeMethods.TV_HITTESTINFO lParam = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO {
pt_x = x,
pt_y = y
};
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, lParam);
if (!(handle == IntPtr.Zero))
{
return this.NodeFromHandle(handle);
}
return null;
}
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x4e:
{
System.Windows.Forms.NativeMethods.NMHDR lParam = (System.Windows.Forms.NativeMethods.NMHDR) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.NMHDR));
switch (lParam.code)
{
case -521:
if (!this.WmShowToolTip(ref m))
{
base.WndProc(ref m);
return;
}
m.Result = (IntPtr) 1;
return;
case -520:
case -530:
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(lParam, lParam.hwndFrom), 0x418, 0, SystemInformation.MaxWindowTrackSize.Width);
this.WmNeedText(ref m);
m.Result = (IntPtr) 1;
return;
}
base.WndProc(ref m);
return;
}
case 0x7b:
{
if (this.treeViewState[0x2000])
{
this.treeViewState[0x2000] = false;
base.WndProc(ref m);
return;
}
TreeNode selectedNode = this.SelectedNode;
if ((selectedNode == null) || ((selectedNode.ContextMenu == null) && (selectedNode.ContextMenuStrip == null)))
{
base.WndProc(ref m);
return;
}
Point pt = new Point(selectedNode.Bounds.X, selectedNode.Bounds.Y + (selectedNode.Bounds.Height / 2));
if (base.ClientRectangle.Contains(pt))
{
if (selectedNode.ContextMenu != null)
{
selectedNode.ContextMenu.Show(this, pt);
return;
}
if (selectedNode.ContextMenuStrip == null)
{
return;
}
bool isKeyboardActivated = ((int) ((long) m.LParam)) == -1;
selectedNode.ContextMenuStrip.ShowInternal(this, pt, isKeyboardActivated);
}
return;
}
case 0x83:
case 5:
case 70:
case 0x47:
if (this.treeViewState[0x8000])
{
this.DefWndProc(ref m);
return;
}
base.WndProc(ref m);
return;
case 7:
if (!this.treeViewState[0x4000])
{
base.WndProc(ref m);
return;
}
this.treeViewState[0x4000] = false;
base.WmImeSetFocus();
this.DefWndProc(ref m);
this.OnGotFocus(EventArgs.Empty);
return;
case 0x15:
base.SendMessage(0x1107, this.Indent, 0);
base.WndProc(ref m);
return;
case 0x201:
{
try
{
this.treeViewState[0x10000] = true;
this.FocusInternal();
}
finally
{
this.treeViewState[0x10000] = false;
}
this.treeViewState[0x1000] = false;
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO {
pt_x = System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam),
pt_y = System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam)
};
this.hNodeMouseDown = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo);
if ((tv_hittestinfo.flags & 0x40) != 0)
{
this.OnMouseDown(new MouseEventArgs(MouseButtons.Left, 1, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
if (!base.ValidationCancelled && this.CheckBoxes)
{
TreeNode node = this.NodeFromHandle(this.hNodeMouseDown);
if (!this.TreeViewBeforeCheck(node, TreeViewAction.ByMouse) && (node != null))
{
node.CheckedInternal = !node.CheckedInternal;
this.TreeViewAfterCheck(node, TreeViewAction.ByMouse);
}
}
m.Result = IntPtr.Zero;
}
else
{
this.WmMouseDown(ref m, MouseButtons.Left, 1);
}
this.downButton = MouseButtons.Left;
return;
}
case 0x202:
case 0x205:
{
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo2 = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO {
pt_x = System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam),
pt_y = System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam)
};
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo2);
if (handle != IntPtr.Zero)
{
if (!base.ValidationCancelled && (!this.treeViewState[0x800] & !this.treeViewState[0x1000]))
{
if (handle == this.hNodeMouseDown)
{
this.OnNodeMouseClick(new TreeNodeMouseClickEventArgs(this.NodeFromHandle(handle), this.downButton, 1, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam)));
}
this.OnClick(new MouseEventArgs(this.downButton, 1, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
this.OnMouseClick(new MouseEventArgs(this.downButton, 1, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
}
if (this.treeViewState[0x800])
{
this.treeViewState[0x800] = false;
if (!base.ValidationCancelled)
{
this.OnNodeMouseDoubleClick(new TreeNodeMouseClickEventArgs(this.NodeFromHandle(handle), this.downButton, 2, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam)));
this.OnDoubleClick(new MouseEventArgs(this.downButton, 2, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
this.OnMouseDoubleClick(new MouseEventArgs(this.downButton, 2, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
}
}
}
if (!this.treeViewState[0x1000])
{
this.OnMouseUp(new MouseEventArgs(this.downButton, 1, System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam), System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam), 0));
}
this.treeViewState[0x800] = false;
this.treeViewState[0x1000] = false;
base.CaptureInternal = false;
this.hNodeMouseDown = IntPtr.Zero;
return;
}
case 0x203:
this.WmMouseDown(ref m, MouseButtons.Left, 2);
this.treeViewState[0x800] = true;
this.treeViewState[0x1000] = false;
base.CaptureInternal = true;
return;
case 0x204:
{
this.treeViewState[0x1000] = false;
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo3 = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO {
pt_x = System.Windows.Forms.NativeMethods.Util.SignedLOWORD(m.LParam),
pt_y = System.Windows.Forms.NativeMethods.Util.SignedHIWORD(m.LParam)
};
this.hNodeMouseDown = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo3);
this.WmMouseDown(ref m, MouseButtons.Right, 1);
this.downButton = MouseButtons.Right;
return;
}
case 0x206:
this.WmMouseDown(ref m, MouseButtons.Right, 2);
this.treeViewState[0x800] = true;
this.treeViewState[0x1000] = false;
base.CaptureInternal = true;
return;
case 0x207:
this.treeViewState[0x1000] = false;
this.WmMouseDown(ref m, MouseButtons.Middle, 1);
this.downButton = MouseButtons.Middle;
return;
case 0x209:
this.treeViewState[0x1000] = false;
this.WmMouseDown(ref m, MouseButtons.Middle, 2);
return;
case 0x2a3:
this.prevHoveredNode = null;
base.WndProc(ref m);
return;
case 0x114:
base.WndProc(ref m);
if (this.DrawMode == TreeViewDrawMode.OwnerDrawAll)
{
base.Invalidate();
}
return;
case 0x113f:
case 0x110d:
base.WndProc(ref m);
if (this.CheckBoxes)
{
System.Windows.Forms.NativeMethods.TV_ITEM tv_item = (System.Windows.Forms.NativeMethods.TV_ITEM) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.TV_ITEM));
if (!(tv_item.hItem != IntPtr.Zero))
{
return;
}
System.Windows.Forms.NativeMethods.TV_ITEM tv_item2 = new System.Windows.Forms.NativeMethods.TV_ITEM {
mask = 0x18,
hItem = tv_item.hItem,
stateMask = 0xf000
};
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(null, base.Handle), System.Windows.Forms.NativeMethods.TVM_GETITEM, 0, ref tv_item2);
this.NodeFromHandle(tv_item.hItem).CheckedStateInternal = (tv_item2.state >> 12) > 1;
}
return;
case 0x204e:
this.WmNotify(ref m);
return;
case 0x317:
this.WmPrint(ref m);
return;
}
base.WndProc(ref m);
}
private unsafe bool WmShowToolTip(ref Message m)
{
System.Windows.Forms.NativeMethods.NMHDR* lParam = (System.Windows.Forms.NativeMethods.NMHDR*) m.LParam;
IntPtr hwndFrom = lParam->hwndFrom;
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO();
Point position = Cursor.Position;
position = base.PointToClientInternal(position);
tv_hittestinfo.pt_x = position.X;
tv_hittestinfo.pt_y = position.Y;
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo);
if ((handle != IntPtr.Zero) && ((tv_hittestinfo.flags & 70) != 0))
{
TreeNode node = this.NodeFromHandle(handle);
if ((node != null) && !this.ShowNodeToolTips)
{
Rectangle bounds = node.Bounds;
bounds.Location = base.PointToScreen(bounds.Location);
System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, hwndFrom), 0x41f, 1, ref bounds);
System.Windows.Forms.SafeNativeMethods.SetWindowPos(new HandleRef(this, hwndFrom), System.Windows.Forms.NativeMethods.HWND_TOPMOST, bounds.Left, bounds.Top, 0, 0, 0x15);
return true;
}
}
return false;
}
private unsafe void WmNotify(ref Message m)
{
System.Windows.Forms.NativeMethods.NMHDR* lParam = (System.Windows.Forms.NativeMethods.NMHDR*) m.LParam;
if (lParam->code == -12)
{
this.CustomDraw(ref m);
}
else
{
System.Windows.Forms.NativeMethods.NMTREEVIEW* nmtv = (System.Windows.Forms.NativeMethods.NMTREEVIEW*) m.LParam;
switch (nmtv->nmhdr.code)
{
case -5:
case -2:
{
MouseButtons left = MouseButtons.Left;
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO();
Point position = Cursor.Position;
position = base.PointToClientInternal(position);
tv_hittestinfo.pt_x = position.X;
tv_hittestinfo.pt_y = position.Y;
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo);
if ((nmtv->nmhdr.code != -2) || ((tv_hittestinfo.flags & 70) != 0))
{
left = (nmtv->nmhdr.code == -2) ? MouseButtons.Left : MouseButtons.Right;
}
if ((((nmtv->nmhdr.code != -2) || ((tv_hittestinfo.flags & 70) != 0)) || this.FullRowSelect) && ((handle != IntPtr.Zero) && !base.ValidationCancelled))
{
this.OnNodeMouseClick(new TreeNodeMouseClickEventArgs(this.NodeFromHandle(handle), left, 1, position.X, position.Y));
this.OnClick(new MouseEventArgs(left, 1, position.X, position.Y, 0));
this.OnMouseClick(new MouseEventArgs(left, 1, position.X, position.Y, 0));
}
if (nmtv->nmhdr.code == -5)
{
TreeNode treeNode = this.NodeFromHandle(handle);
if ((treeNode != null) && ((treeNode.ContextMenu != null) || (treeNode.ContextMenuStrip != null)))
{
this.ShowContextMenu(treeNode);
}
else
{
this.treeViewState[0x2000] = true;
base.SendMessage(0x7b, base.Handle, System.Windows.Forms.SafeNativeMethods.GetMessagePos());
}
m.Result = (IntPtr) 1;
}
if (!this.treeViewState[0x1000] && ((nmtv->nmhdr.code != -2) || ((tv_hittestinfo.flags & 70) != 0)))
{
this.OnMouseUp(new MouseEventArgs(left, 1, position.X, position.Y, 0));
this.treeViewState[0x1000] = true;
}
break;
}
case -460:
case -411:
m.Result = this.TvnEndLabelEdit((System.Windows.Forms.NativeMethods.NMTVDISPINFO) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.NMTVDISPINFO)));
return;
case -459:
case -410:
m.Result = this.TvnBeginLabelEdit((System.Windows.Forms.NativeMethods.NMTVDISPINFO) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.NMTVDISPINFO)));
return;
case -458:
case -453:
case -452:
case -409:
case -404:
case -403:
break;
case -457:
case -408:
this.TvnBeginDrag(MouseButtons.Right, nmtv);
return;
case -456:
case -407:
this.TvnBeginDrag(MouseButtons.Left, nmtv);
return;
case -455:
case -406:
this.TvnExpanded(nmtv);
return;
case -454:
case -405:
m.Result = this.TvnExpanding(nmtv);
return;
case -451:
case -402:
this.TvnSelected(nmtv);
return;
case -450:
case -401:
m.Result = this.TvnSelecting(nmtv);
return;
default:
return;
}
}
}
private void WmNeedText(ref Message m)
{
System.Windows.Forms.NativeMethods.TOOLTIPTEXT lParam = (System.Windows.Forms.NativeMethods.TOOLTIPTEXT) m.GetLParam(typeof(System.Windows.Forms.NativeMethods.TOOLTIPTEXT));
string controlToolTipText = this.controlToolTipText;
System.Windows.Forms.NativeMethods.TV_HITTESTINFO tv_hittestinfo = new System.Windows.Forms.NativeMethods.TV_HITTESTINFO();
Point position = Cursor.Position;
position = base.PointToClientInternal(position);
tv_hittestinfo.pt_x = position.X;
tv_hittestinfo.pt_y = position.Y;
IntPtr handle = System.Windows.Forms.UnsafeNativeMethods.SendMessage(new HandleRef(this, base.Handle), 0x1111, 0, tv_hittestinfo);
if ((handle != IntPtr.Zero) && ((tv_hittestinfo.flags & 70) != 0))
{
TreeNode node = this.NodeFromHandle(handle);
if ((this.ShowNodeToolTips && (node != null)) && !string.IsNullOrEmpty(node.ToolTipText))
{
controlToolTipText = node.ToolTipText;
}
else if ((node != null) && (node.Bounds.Right > base.Bounds.Right))
{
controlToolTipText = node.Text;
}
else
{
controlToolTipText = null;
}
}
lParam.lpszText = controlToolTipText;
lParam.hinst = IntPtr.Zero;
if (this.RightToLeft == RightToLeft.Yes)
{
lParam.uFlags |= 4;
}
Marshal.StructureToPtr(lParam, m.LParam, false);
}
