private void OnNodeExpanding(TreeViewNode sender, object args)
{
var treeViewExpandingEventArgs = new TreeViewExpandingEventArgs(sender);
if (ListControl != null)
{
if (ContainerFromNode(sender) is TreeViewItem expandingTvi)
{
if (!expandingTvi.IsExpanded)
{
expandingTvi.IsExpanded = true;
}
//Update TemplateSettings properties
var templateSettings = expandingTvi.TreeViewItemTemplateSettings;
templateSettings.ExpandedGlyphVisibility = Visibility.Visible;
templateSettings.CollapsedGlyphVisibility = Visibility.Collapsed;
}
Expanding?.Invoke(this, treeViewExpandingEventArgs);
}
}
protected void RaiseExpandingEvent(Expander container)
{
Expanding?.Invoke(this, new ExpanderExpandingEventArgs()); // Uno Doc: We won't use null for args like WinUI
}
/// <summary>
/// Common native callback for Task Dialogs.
/// Will route events to the user event handler.
/// </summary>
/// <param name="refData">TODO: Currently unused, would need complex marshaling of data.</param>
internal IntPtr CommonCallbackProc(IntPtr hWnd, uint uEvent, UIntPtr wParam, IntPtr lParam, IntPtr refData)
{
_hwnd = hWnd;
//Handle event
switch ((NativeMethods.TaskDialogNotification)uEvent)
{
case NativeMethods.TaskDialogNotification.TDN_CREATED:
//Dispatch buffered messages
DispatchMessageQueue();
Created?.Invoke(this, EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotification.TDN_NAVIGATED:
//Dispatch buffered messages (copied in from the new task dialog we are navigating to)
DispatchMessageQueue();
Navigating?.Invoke(this, EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotification.TDN_BUTTON_CLICKED:
var evtButtonClick = ButtonClick;
if (evtButtonClick != null)
{
ClickEventArgs args = new ClickEventArgs((int)wParam);
evtButtonClick(this, args);
//Return value given by user to prevent closing (false will close)
return((IntPtr)((args.PreventClosing) ? 1 : 0));
}
break;
case NativeMethods.TaskDialogNotification.TDN_HYPERLINK_CLICKED:
HyperlinkClick?.Invoke(this, new HyperlinkEventArgs(Marshal.PtrToStringUni(lParam)));
break;
case NativeMethods.TaskDialogNotification.TDN_TIMER:
var evtTick = Tick;
if (evtTick != null)
{
var args = new TimerEventArgs((long)wParam);
evtTick(this, args);
//Return value given by user to reset timer ticks
return((IntPtr)((args.ResetCount) ? 1 : 0));
}
break;
case NativeMethods.TaskDialogNotification.TDN_DESTROYED:
//Set dialog as not "showing" and drop handle to window
_hwnd = IntPtr.Zero;
Destroyed?.Invoke(this, EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotification.TDN_RADIO_BUTTON_CLICKED:
RadioButtonClick?.Invoke(this, new ClickEventArgs((int)wParam));
break;
case NativeMethods.TaskDialogNotification.TDN_DIALOG_CONSTRUCTED:
Constructed?.Invoke(this, EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotification.TDN_VERIFICATION_CLICKED:
VerificationClick?.Invoke(this, new CheckEventArgs((uint)wParam == 1));
break;
case NativeMethods.TaskDialogNotification.TDN_HELP:
Help?.Invoke(this, EventArgs.Empty);
break;
case NativeMethods.TaskDialogNotification.TDN_EXPANDO_BUTTON_CLICKED:
Expanding?.Invoke(this, new ExpandEventArgs((uint)wParam != 0));
break;
}
return(IntPtr.Zero);
}