internal void ActivateInGroupLimits(HwndAdorner adorner)
{
if( !m_owned ) return;
var current = m_ownerSource.Handle;
// getting the hwnd above the owner (in win32, the prev hwnd is the one visually above)
var prev = Win32.GetWindow(current, Win32.GW_HWNDPREV);
// searching up for the first non-sibling hwnd
while (IsSibling(prev))
{
current = prev;
prev = Win32.GetWindow(current, Win32.GW_HWNDPREV);
}
if (prev == IntPtr.Zero)
// the owner or one of the siblings is the Top-most window
{
// setting the Top-most under the activated adorner
Win32.SetWindowPos(current, adorner.Handle, 0, 0, 0, 0, SET_ONLY_ZORDER);
}
else
{
// setting the activated adorner under the first non-sibling hwnd
Win32.SetWindowPos(adorner.Handle, prev, 0, 0, 0, 0, SET_ONLY_ZORDER);
}
}
internal void ActivateInGroupLimits(HwndAdorner adorner)
{
if (!m_owned)
{
return;
}
var current = m_ownerSource.Handle;
// getting the hwnd above the owner (in win32, the prev hwnd is the one visually above)
var prev = Win32.GetWindow(current, Win32.GW_HWNDPREV);
// searching up for the first non-sibling hwnd
while (IsSibling(prev))
{
current = prev;
prev = Win32.GetWindow(current, Win32.GW_HWNDPREV);
}
if (prev == IntPtr.Zero)
// the owner or one of the siblings is the Top-most window
{
// setting the Top-most under the activated adorner
Win32.SetWindowPos(current, adorner.Handle, 0, 0, 0, 0, SET_ONLY_ZORDER);
}
else
{
// setting the activated adorner under the first non-sibling hwnd
Win32.SetWindowPos(adorner.Handle, prev, 0, 0, 0, 0, SET_ONLY_ZORDER);
}
}
internal bool AddAdorner(HwndAdorner adorner)
{
if (!Activated)
{
Activate();
}
lock (m_adornersInGroup)
{
if (!m_adornersInGroup.Contains(adorner))
{
m_adornersInGroup.Add(adorner);
}
}
if (m_owned)
{
SetOwnership(adorner);
ActivateInGroupLimits(adorner);
adorner.InvalidateAppearance();
var root = (UIElement)m_ownerSource.RootVisual;
adorner.UpdateOwnerPosition(GetRectFromRoot(root));
}
return(true);
}
private static void OnAdornmentAttached(DependencyObject d, DependencyPropertyChangedEventArgs args)
{
var element = d as FrameworkElement;
if(element == null) return;
UIElement adornment = (UIElement) args.NewValue;
var adorner = GetHwndAdorner(element);
if (adornment != null)
{
if (adorner == null)
{
SetHwndAdorner(element, adorner = new HwndAdorner(element));
}
adorner.Adornment = adornment;
}
else
{
if (adorner != null)
{
adorner.Dispose();
SetHwndAdorner(element, null);
}
}
}
public HwndAdornerElement()
{
m_hwndAdorner = new HwndAdorner(this);
// This helps dependency property inheritance and resource search cross the visual tree boundary
// (between the tree containing this object and the one containing the adorner root)
AddLogicalChild(m_hwndAdorner.Root);
}
public HwndAdornerElement()
{
m_hwndAdorner = new HwndAdorner(this);
// This helps dependency property inheritance and resource search cross the visual tree boundary
// (between the tree containing this object and the one containing the adorner root)
AddLogicalChild(m_hwndAdorner.Root);
}
internal bool RemoveAdorner(HwndAdorner adorner)
{
var res = m_adornersInGroup.Remove(adorner);
if (m_owned)
{
RemoveOwnership(adorner);
adorner.InvalidateAppearance();
}
if (!HasAdorners)
{
Deactivate();
}
return(res);
}
internal bool AddAdorner(HwndAdorner adorner)
{
if (!Activated)
{
Activate();
}
if (!m_adornersInGroup.Contains(adorner))
{
m_adornersInGroup.Add(adorner);
}
if (m_owned)
{
SetOwnership(adorner);
ActivateInGroupLimits(adorner);
adorner.InvalidateAppearance();
var root = (UIElement) m_ownerSource.RootVisual;
adorner.UpdateOwnerPosition(GetRectFromRoot(root));
}
return true;
}
public HwndHostPresenter()
{
m_hwndAdorner = new HwndAdorner(this);
AddLogicalChild(m_hwndAdorner.Root);
}
private static void RemoveOwnership(HwndAdorner adorner)
{
Win32.SetWindowLong(adorner.Handle, Win32.GWL_HWNDPARENT, IntPtr.Zero);
}
private void SetOwnership(HwndAdorner adorner)
{
Win32.SetWindowLong(adorner.Handle, Win32.GWL_HWNDPARENT, m_ownerSource.Handle);
}
private void SetOwnership(HwndAdorner adorner)
{
Win32.SetWindowLong(adorner.Handle, Win32.GWL_HWNDPARENT, m_ownerSource.Handle);
}
private static void RemoveOwnership(HwndAdorner adorner)
{
Win32.SetWindowLong(adorner.Handle, Win32.GWL_HWNDPARENT, IntPtr.Zero);
}
internal bool RemoveAdorner(HwndAdorner adorner)
{
var res = m_adornersInGroup.Remove(adorner);
if (m_owned)
{
RemoveOwnership(adorner);
adorner.InvalidateAppearance();
}
if (!HasAdorners)
{
Deactivate();
}
return res;
}
private static void SetHwndAdorner(DependencyObject element, HwndAdorner value)
{
element.SetValue(HwndAdornerProperty, value);
}
