protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
if (args.KeyCode != Keycode.Back)
{
args.Handled = false;
return;
}
args.Handled = true;
Config?.OnAction(new LoginResult(false, null, null));
Dismiss();
}
protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
if (args.KeyCode != Keycode.Back)
{
return;
}
args.Handled = true;
this.Config?.OnAction?.Invoke();
this.Dismiss();
}
protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
if (args.KeyCode != Android.Views.Keycode.Back)
{
return;
}
args.Handled = true;
this.Dismiss();
}
protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
if (args.KeyCode == Android.Views.Keycode.Back)
{
args.Handled = true;
this.Config?.Action?.Invoke(false);
this.Dismiss();
}
}
/// <summary>
/// Observes for HwndSource changes on the given UIElement, and adds and removes an HwndSource hook when the HwndSource changes.</summary>
private void HookChildHwndSource(UIElement child)
{
// The delegate reference is stored on the UIElement, and the lifetime
// of the child is equal to the lifetime of this UIElementDialogPage,
// so we are not leaking memory by not calling RemoveSourceChangedHandler.
PresentationSource.AddSourceChangedHandler(child, OnSourceChanged);
void OnSourceChanged(object sender, SourceChangedEventArgs e)
{
if (e.OldSource is HwndSource old_source)
{
old_source.RemoveHook(SourceHook);
}
if (e.NewSource is HwndSource new_source)
{
new_source.AddHook(SourceHook);
}
}
IntPtr SourceHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
// Handle WM_GETDLGCODE in order to allow for arrow and tab navigation inside the dialog page.
// By returning this code, Windows will pass arrow and tab keys to our HWND instead of handling
// them for its own default tab and directional navigation.
switch (msg)
{
case Win32.WM_GETDLGCODE:
{
int dlg_code = Win32.DLGC_WANTARROWS | Win32.DLGC_WANTTAB | Win32.DLGC_WANTCHARS;
// Ask the currently-focused element if it wants to handle all keys or not. The DialogKeyPendingEvent
// is a routed event starting with the focused control. If any control in the route handles
// this message, then we'll add DLGC_WANTALLKEYS to request that this pending message
// be delivered to our content instead of the default dialog procedure.
if (Keyboard.FocusedElement is IInputElement current_element)
{
var args = new DialogKeyEventArgs(DialogKeyPendingEvent, KeyInterop.KeyFromVirtualKey(wParam.ToInt32()));
current_element.RaiseEvent(args);
if (args.Handled)
{
dlg_code |= Win32.DLGC_WANTALLKEYS;
}
}
handled = true;
return(new IntPtr(dlg_code));
}
}
return(IntPtr.Zero);
}
}
protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
if (args.KeyCode != Keycode.Back)
{
return;
}
args.Handled = true;
if (this.Config.IsCancellable)
{
this.Config?.OnAction?.Invoke(new TimePromptResult(false, TimeSpan.MinValue));
this.Dismiss();
}
}
protected override void Dialog_KeyPress(object sender, DialogKeyEventArgs e)
{
if (e.KeyCode == Keycode.Back)
{
if (e.Event.Action == KeyEventActions.Up)
{
if (ValidateExit(true))
{
e.Handled = true;
}
else
{
e.Handled = false;
}
}
}
else
{
e.Handled = false;
}
}
protected override void OnKeyPress(object sender, DialogKeyEventArgs args)
{
base.OnKeyPress(sender, args);
args.Handled = false;
switch (args.KeyCode)
{
case Keycode.Back:
args.Handled = true;
if (this.Config.IsCancellable)
{
this.SetAction(false);
}
break;
case Keycode.Enter:
args.Handled = true;
this.SetAction(true);
break;
}
}
protected virtual void OnKeyPress(object sender, DialogKeyEventArgs args)
{
}
protected virtual void Dialog_KeyPress(object sender, DialogKeyEventArgs e)
{
}
