protected override void OnAppearing()
{
base.OnAppearing();
// Hide cancel button on iOS since it has its own.
if (Device.RuntimePlatform == Device.iOS)
{
SearchSearchBar.WidthRequest = Width;
}
if (Device.RuntimePlatform == Device.UWP)
{
SearchSearchBar.HeightRequest = 35;
SearchSearchBar.WidthRequest = Width;
}
if (_viewModel.SearchResults.Count == 0)
{
// Focus the search bar so keyboard pops up.
SearchSearchBar.Focus();
}
// To workaround problem with initial progress color.
SearchResultListView.BeginRefresh();
SearchResultListView.EndRefresh();
}
private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (this.Visibility != Visibility.Visible)
{
e.Handled = true;
return;
}
if (Keyboard.Modifiers == ModifierKeys.Alt)
{
e.Handled = true;
return;
}
switch (e.Key)
{
case Key.LeftAlt:
case Key.RightAlt:
{
e.Handled = true;
break;
}
case Key.Tab: /*open the search filter list if it's closed, otherwise cycle through the options*/
{
if (SearchFilterList.Visibility == Visibility.Collapsed)
{
SearchFilterList.Visibility = Visibility.Visible;
}
else
{
if (SearchFilterList.SelectedIndex == SearchFilterList.Items.Count - 1)
{
SearchFilterList.SelectedIndex = 0;
}
else
{
SearchFilterList.SelectedIndex++;
}
}
e.Handled = true;
break;
}
case Key.Escape:
{
SearchBox.Text = "";
SearchFilterList.Visibility = Visibility.Collapsed;
break;
}
case Key.Up:
{
if (SearchResultListView.Items.Count > 0)
{
if (SearchResultListView.SelectedIndex > 0)
{
SearchResultListView.SelectedIndex = SearchResultListView.SelectedIndex - 1;
}
SearchResultListView.ScrollIntoView(SearchResultListView.SelectedItem);
}
e.Handled = true;
break;
}
case Key.Down:
{
if (SearchResultListView.Items.Count > 0)
{
if (SearchResultListView.SelectedIndex < SearchResultListView.Items.Count - 1)
{
SearchResultListView.SelectedIndex = SearchResultListView.SelectedIndex + 1;
}
SearchResultListView.ScrollIntoView(SearchResultListView.SelectedItem);
}
e.Handled = true;
break;
}
default:
{
SearchFilterList.Visibility = Visibility.Collapsed;
break;
}
}
if (SearchBox.IsFocused == false)
{
SearchBox.Focus();
}
}
