I have a container control that is handling PointerPressed and PointerMoved events.
The container contains a set of buttons.
At the point of handling the event, how can I determine which button actually received it?
mainPage.AddHandler(PointerPressedEvent, new PointerEventHandler(pointerPressedHandler), true);
private void pointerPressedHandler(object sender, PointerRoutedEventArgs e)
{
var p = e.GetCurrentPoint(null); // maybe can be done using position info?
var s = e.OriginalSource as Border; // OriginalSource is a Border, not the Button, and I don't seem to be able to get to the Button from the Border
// todo - determine which button was clicked
}
This works:
private void pointerPressedHandler(object sender, PointerRoutedEventArgs e)
{
var p = e.GetCurrentPoint(null);
var elements = VisualTreeHelper.FindElementsInHostCoordinates(p.Position, mainPage, false);
Button foundButton;
foreach (var item in elements)
{
foundButton = item as Button;
if (foundButton != null)
{
System.Diagnostics.Debug.WriteLine("found button: " + foundButton.Name);
}
}
}
Related
I am working on a Windows 8 metro app and having multiple SettingsFlyout items which get added by below mentioned code
SettingsCommand cmd1 = new SettingsCommand("sample", "Color Settings", (x) =>
{
// create a new instance of the flyout
SettingsFlyout settings = new SettingsFlyout();
// set the desired width. If you leave this out, you will get Narrow (346px)
// optionally change header and content background colors away from defaults (recommended)
// if using Callisto's AppManifestHelper you can grab the element from some member var you held it in
// settings.HeaderBrush = new SolidColorBrush(App.VisualElements.BackgroundColor);
settings.HeaderBrush = new SolidColorBrush(Colors.Black);
settings.HeaderText = string.Format("Color Settings", App.VisualElements.DisplayName);
settings.Background = new SolidColorBrush(_background);
settings.Margin = new Thickness(0);
// provide some logo (preferrably the smallogo the app uses)
BitmapImage bmp = new BitmapImage(App.VisualElements.SmallLogoUri);
settings.SmallLogoImageSource = bmp;
// set the content for the flyout
settings.Content = new ColorSettings();
settings.HorizontalAlignment = Windows.UI.Xaml.HorizontalAlignment.Stretch;
// open it
settings.IsOpen = true;
// this is only for the test app and not needed
// you would not use this code in your real app
// ObjectTracker.Track(settings);
});
Currently using (SettingsPane.Show()) i can be able to show the added flyout items list but I want to programmatically open any setting Flyout item instead of opening a flyout list.
Create a new class
public class SettingsFlyout
{
private const int _width = 346;
private Popup _popup;
/// <summary>
/// Show the Flyout with the UserControl as content
/// </summary>
/// <param name="control"></param>
public void ShowFlyout(UserControl control)
{
_popup = new Popup();
_popup.Closed += OnPopupClosed;
Window.Current.Activated += OnWindowActivated;
_popup.IsLightDismissEnabled = true;
_popup.Width = _width;
_popup.Height = Window.Current.Bounds.Height;
control.Width = _width;
control.Height = Window.Current.Bounds.Height;
_popup.Child = control;
_popup.SetValue(Canvas.LeftProperty, Window.Current.Bounds.Width - _width);
_popup.SetValue(Canvas.TopProperty, 0);
_popup.IsOpen = true;
}
private void OnWindowActivated(object sender, Windows.UI.Core.WindowActivatedEventArgs e)
{
if (e.WindowActivationState == Windows.UI.Core.CoreWindowActivationState.Deactivated)
{
_popup.IsOpen = false;
}
}
void OnPopupClosed(object sender, object e)
{
Window.Current.Activated -= OnWindowActivated;
}
}
In a XAML page take a button and then write the button click event.
private void Button_Click_1(object sender, RoutedEventArgs e)
{
SettingsFlyout flyout = new SettingsFlyout();
flyout.ShowFlyout(new FlyoutContentUserControl());
}
Please note one thing FlyoutContentUserControl is the user control which you would like to show.
Credits goes to Q42.WinRT
The code you posted registers a SettingsCommands to the system settings pane. When your command is invoked from the system settings pane, you new up a SettingsFlyout instance and set IsOpen=True on it.
You just need to refactor this code to a separate method (e.g. ShowColorSettingsFlyout()), and also call that method from your Button.Click event handler. You can create a new Callisto SettingsFlyout and set IsOpen=True on it anywhere.
In App.xaml.cs add the following to register your SettingsFlyout e.g. CustomSetting ...
protected override void OnWindowCreated(WindowCreatedEventArgs args)
{
SettingsPane.GetForCurrentView().CommandsRequested += OnCommandsRequested;
}
private void OnCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
{
args.Request.ApplicationCommands.Add(new SettingsCommand(
"Custom Setting", "Custom Setting", (handler) => ShowCustomSettingFlyout()));
}
public void ShowCustomSettingFlyout()
{
CustomSetting CustomSettingFlyout = new CustomSetting();
CustomSettingFlyout.Show();
}
Then anywhere in your code you want to programmatically open the CustomSetting flyout, call ShowCustomSettingFlyout, e.g. in the event handler for a button click...
void Button_Click_1(object sender, RoutedEventArgs e)
{
ShowCustomSettingFlyout()
}
Adapted from: Quickstart: Add app settings (XAML).
How do I enter snap state using the Windows 8 emulator? I received a notice from the Windows 8 store that my software crashes in snap mode only. Does anyone know why switching modes would cause my software to crash? Here is my code behind:
namespace MenuFinderWin8.Pages
{
public sealed partial class RestaurantHomePage : MenuFinderWin8.Common.LayoutAwarePage
{
MenuFinderAppServiceClient serviceClient;
RestaurantRepository repository;
Geolocator _geolocator = null;
ObservableCollection<RestaurantLocation> items;
public RestaurantHomePage()
{
this.InitializeComponent();
if (!Network.IsNetwork())
{
return;
}
repository = new RestaurantRepository();
serviceClient = new MenuFinderAppServiceClient();
_geolocator = new Geolocator();
items = new ObservableCollection<RestaurantLocation>();
BindData();
}
void btnAbout_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
SupportUserControl userControl = new SupportUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 200;
f.Height = 200;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnSearch_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
RestaurantSearchUserControl userControl = new RestaurantSearchUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 600;
f.Height = 400;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnViewFavorites_Click(object sender, RoutedEventArgs e)
{
App.DataMode = Mode.SavedRestaurant;
if (repository.GetGroupedRestaurantsFromDatabase().Count() == 0)
{
MessageDialog messageDialog = new MessageDialog("You have no saved restaurants.", "No Restaurants");
messageDialog.ShowAsync();
}
else
{
this.Frame.Navigate(typeof(RestaurantSearchDetails));
}
}
private async void BindData()
{
try
{
items = await serviceClient.GetSpecialRestaurantsAsync();
List<RestaurantLocation> myFavs = repository.GetRestaurantLocations();
foreach (var a in myFavs)
{
items.Add(a);
}
this.DefaultViewModel["Items"] = items;
}
catch (Exception)
{
MessageDialog messsageDialog = new MessageDialog("The MenuFinder service is unavailable at this time or you have lost your internet connection. If your internet is OK, please check back later.", "Unavailable");
messsageDialog.ShowAsync();
btnAbout.IsEnabled = false;
btnSearch.IsEnabled = false;
btnViewFavorites.IsEnabled = false;
}
myBar.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
{
// TODO: Assign a bindable collection of items to this.DefaultViewModel["Items"]
}
private void itemGridView_ItemClick_1(object sender, ItemClickEventArgs e)
{
App.CurrentRestaurantLocation = e.ClickedItem as RestaurantLocation;
if (App.CurrentRestaurantLocation != null)
{
Order order = repository.AddOrder(DateTime.Now, string.Empty, App.CurrentRestaurantLocation.ID);
App.CurrentOrder = order;
App.DataMode = Mode.Menu;
this.Frame.Navigate(typeof(RootViewPage));
}
}
}
}
In response to "How do I enter snap state using the Windows 8 emulator?" - I find the easiest way to snap in the simulator is to use the keyboard shortcut, which is Windows key + . (period).
The error might be in your XAML, more than in the code behind. If you used a template but deleted or modified the name in one of the elements, the KeyFrame refering to that element is failing getting the element, so an exception is thrown.
Search in your XAML for something like
<VisualState x:Name="Snapped">
<Storyboard>...
And delete the ObjectAnimationUsingKeyFrames tags which Storyboard.TargetName property is equal to a non-existant element.
Refering on how to enter Snapped Mode on the emulator, is the same as in PC, just grab the App from the top and slide it to a side while holding the click.
Using a GridView, I bind to several items in an observable collection. When I enter snapped mode, my GridView fails to load any data and none of the items are clickable. See attached screenshot. My app is on the left and it says featured and favorites. Here is my code:
public sealed partial class RestaurantHomePage : MenuFinderWin8.Common.LayoutAwarePage
{
MenuFinderAppServiceClient serviceClient;
RestaurantRepository repository;
Geolocator _geolocator = null;
ObservableCollection<RestaurantLocation> items;
public RestaurantHomePage()
{
this.InitializeComponent();
if (!Network.IsNetwork())
{
return;
}
repository = new RestaurantRepository();
serviceClient = new MenuFinderAppServiceClient();
_geolocator = new Geolocator();
items = new ObservableCollection<RestaurantLocation>();
//BindData();
}
void btnAbout_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
SupportUserControl userControl = new SupportUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 200;
f.Height = 200;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnSearch_Click(object sender, RoutedEventArgs e)
{
Flyout f = new Flyout();
LayoutRoot.Children.Add(f.HostPopup); // add this to some existing control in your view like the root visual
// remove the parenting during the Closed event on the Flyout
f.Closed += (s, a) =>
{
LayoutRoot.Children.Remove(f.HostPopup);
};
// Flyout is a ContentControl so set your content within it.
RestaurantSearchUserControl userControl = new RestaurantSearchUserControl();
userControl.UserControlFrame = this.Frame;
f.Content = userControl;
f.BorderBrush = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 223, 58, 51));
f.Width = 600;
f.Height = 400;
f.Placement = PlacementMode.Top;
f.PlacementTarget = sender as Button; // this is an UI element (usually the sender)
f.IsOpen = true;
}
void btnViewFavorites_Click(object sender, RoutedEventArgs e)
{
App.DataMode = Mode.SavedRestaurant;
if (repository.GetGroupedRestaurantsFromDatabase().Count() == 0)
{
MessageDialog messageDialog = new MessageDialog("You have no saved restaurants.", "No Restaurants");
messageDialog.ShowAsync();
}
else
{
this.Frame.Navigate(typeof(RestaurantSearchDetails));
}
}
private async void BindData()
{
try
{
items = await serviceClient.GetSpecialRestaurantsAsync();
List<RestaurantLocation> myFavs = repository.GetRestaurantLocations();
foreach (var a in myFavs)
{
items.Add(a);
}
this.DefaultViewModel["Items"] = items;
}
catch (Exception)
{
MessageDialog messsageDialog = new MessageDialog("The MenuFinder service is unavailable at this time or you have lost your internet connection. If your internet is OK, please check back later.", "Unavailable");
messsageDialog.ShowAsync();
btnAbout.IsEnabled = false;
btnSearch.IsEnabled = false;
btnViewFavorites.IsEnabled = false;
}
myBar.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
{
BindData();
// TODO: Assign a bindable collection of items to this.DefaultViewModel["Items"]
}
private void itemGridView_ItemClick_1(object sender, ItemClickEventArgs e)
{
App.CurrentRestaurantLocation = e.ClickedItem as RestaurantLocation;
if (App.CurrentRestaurantLocation != null)
{
Order order = repository.AddOrder(DateTime.Now, string.Empty, App.CurrentRestaurantLocation.ID);
App.CurrentOrder = order;
App.DataMode = Mode.Menu;
this.Frame.Navigate(typeof(RootViewPage));
}
}
}
When you switch to snapped view, your gridView hides, and a ListView shows up. You can see this by checking the Visual State Manager that handles going from one to another in your XAML.
So, Solution is: adapting the ItemTemplate from your ListView as you did with your GridView by Binding to the proper attributes; you may also want to change the Foreground color of your Font. Also, you want to include the IsItemClickEnabled and ItemClick (or SelectionMode and SelectionChanged) on your ListView.
bool isChecked = false;
private void Agency3_Checked(object sender, RoutedEventArgs e)
{
isChecked = (bool)(((RadioButton)sender).IsChecked);
}
private void Agency3_Click(object sender, RoutedEventArgs e)
{
RadioButton currentButton = (RadioButton)sender;
if ((bool)currentButton.IsChecked && !isChecked)
{
currentButton.IsChecked = false;
}
else
{
currentButton.IsChecked = true;
isChecked = false;
}
}
This code helps deselect the radio button when it is clicked at the time when it was already selected.
I got this from a post on StackOverflow but it was closed.
Are both functions Agency3_Click() and Agency3_Checked() not called when a radio button is clicked?
What order are they called in which makes this behavior of deselecting a radio button possible?
I have a list of items defined in a ListView. When user click or tap any item, I want to show a PopupMenu just above the selected Item. How should I position the PopupMenu?
varmenu =newPopupMenu();
menu.Commands.Add(
newUICommand("Remove", (x) =>
{...
// Create the message dialog and set its content
}, 1));
var chosenCommand =awaitmenu.ShowForSelectionAsync(GetElementRect((FrameworkElement)sender));
Rect GetElementRect(FrameworkElement element)
{
GeneralTransform buttonTransform = element.TransformToVisual(null);
Pointpoint = buttonTransform.TransformPoint(newPoint());
returnnewRect(point,newSize(element.ActualWidth, element.ActualHeight));
}
This is the code I've been using to open up a popup menu above a button in an app bar.
private async void OnOpenMenu(object sender, RoutedEventArgs e)
{
var button = (Button)sender;
var transform = button.TransformToVisual(this);
var point = transform.TransformPoint(new Point(0, 0));
var menu = new PopupMenu();
menu.Commands.Add(new UICommand("Menu Item 1"));
menu.Commands.Add(new UICommand("Menu Item 2"));
await menu.ShowAsync(point);
}