Currently I am working on windows phone 8.
When a textbox get focus in popup window it hide under the keyboard. I've tried subtracting the keyboard height from the VerticalOffset of popup window. But still the textbox is hiding under the keyboard because of the suggestion bar of the keyboard. Is there any way to get the height of keyboard's suggestion bar?
Thanks!!!
Not in a Windows Phone 8 Silverlight app
If you upgrade to a Windows Phone 8.1 Silverlight app (or Runtime, but that's a bigger update) then you can use the InputPane class and examine its OccludedRect property in the Showing event.
This will fire whenever the keyboard changes what it covers, so you'll get the event once when the keyboard first opens and then again when the suggestion bar slides up.
protected override void OnNavigatedTo(NavigationEventArgs e)
{
Windows.UI.ViewManagement.InputPane.GetForCurrentView().Showing += MainPage_Showing;
Windows.UI.ViewManagement.InputPane.GetForCurrentView().Hiding += MainPage_Hiding;
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
Windows.UI.ViewManagement.InputPane.GetForCurrentView().Showing -= MainPage_Showing;
Windows.UI.ViewManagement.InputPane.GetForCurrentView().Hiding -= MainPage_Hiding;
}
void MainPage_Hiding(Windows.UI.ViewManagement.InputPane sender, Windows.UI.ViewManagement.InputPaneVisibilityEventArgs args)
{
Debug.WriteLine("Hiding and occluding {0}", sender.OccludedRect.Height);
}
void MainPage_Showing(Windows.UI.ViewManagement.InputPane sender, Windows.UI.ViewManagement.InputPaneVisibilityEventArgs args)
{
Debug.WriteLine("Showing and occluding {0}", sender.OccludedRect.Height);
}
Depending on your layout this may not be necessary on WP8.1. I tested a WP8 app on the WP8.1 emulator and the TextBoxes in my Popup slid out of the way of the suggestion bar as well as out of the way of the keyboard. If your layout is complex enough that doesn't work (e.g. if you need to move things below the focused TextBox as well) then you can handle Showing to move things yourself and then set InputPaneVisibilityEventArgs.EnsuredFocusedElementInView to let the InputPane not to also move things itself.
Related
I have UWP app that implements the below code to wire up the system back button. My understanding is that this event is provided to capture hardware back buttons on Windows Phones, the back button in the title bar on Windows 10 and the back button on the task bar in Windows 10 tablet mode.
The hardware and title bar back buttons are working in my app, but when in tablet mode, pressing the back button on the task bar moves my app to the background and navigates to the Start Menu regardless of where I am in the app backstack. The BackRequested event IS firing in this case and my app is navigating back one page.
protected override async void OnLaunched(LaunchActivatedEventArgs args)
{
Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested +=
App_BackRequested;
}
private void App_BackRequested(object sender, BackRequestedEventArgs e)
{
NavService.GoBack();
}
Any thoughts on why the tablet mode back button would behave this way? I'm seeing this behavior across many Windows 10 PCs, Surfaces, etc.
The default behavior of the Tablet mode back button is indeed to navigate out of the app. To prevent this you have to make sure that when you can navigate back in the app, you also mark the back navigation as handled.
private void App_BackRequested(object sender, BackRequestedEventArgs e)
{
if ( NavService.CanGoBack() )
{
NavService.GoBack();
e.Handled = true;
}
}
You will have to add a CanGoBack() method that will check the app Frame's CanGoBack property.
What I want:
Set my WPF to inactive all the time, even when I press buttons, whatever I do with that WPF app as I'm interacting with it, I don't want any other app to lose it's focus/activation, for example, how does a software keyboard work? if the keyboard is to input text correctly, the active window (google for example) has to remain active while the software keyboard is being used, otherwise the keyboard would not be able to input keystrokes since google lost focus/activation when the keyboard is touched.
What I want to do:
private void button_Click(object sender, RoutedEventArgs e)
{
InputSimulator.SimulateTextEntry("1");
}
My WPF needs to send that keystroke text into the active window of 'google' for example, but when I press the button the focus/activation from google is lost and it is now in my WPF app, due to this I could not send the keystroke, just imagine the surface pro 3 software keyboard, when you press it's buttons it does not take away the current applications focus/activation, I want to do something similar, how do I do it?
Not sure if it possible because you just focus a window on click.
You could unfocus the mainwindow all the time when it got focused.
public partial class App : Application
{
public App()
{
Activated += (s,e) =>
{
App.Current.MainWindow.SetValue(MyApp.MainWindow.IsFocusedProperty, false);
};
}
}
I am developing a windows phone 8 app. I want to control the back button of the phone for doing specific task. I want that when user press the back button in specific page it will not navigate to the previous page but to the page which I want. Is their any way to control the hardware back button present in phone?
In Silverlight apps (WP7, WP8, WP8.1) you do this:
protected override void OnBackKeyPress(CancelEventArgs e)
{
// put any code you like here
MessageBox.Show("You pressed the Back button");
e.Cancel = true;
}
That will work in all Windows Phone versions if you're using Silverlight.
If you're using WinRT for Windows Phone 8.1, it is a bit different:
Open NavigationHelper.cs and make this modification:
private void HardwareButtons_BackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)
{
if (this.GoBackCommand.CanExecute(null) && !e.Handled)
{
e.Handled = true;
this.GoBackCommand.Execute(null);
}
}
Now in your app page (the page that will be open when the back button is pressed), add the following namespace:
using Windows.Phone.UI.Input;
Add this handler to the constructor method of your page:
HardwareButtons.BackPressed += OnBackPressed;
Then add this method:
private async void OnBackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)
{
e.Handled = true;
// add your own code here to run when Back is pressed
}
Note: in both cases, the 'e.Handled = true' line tells the OS that the back button press has been handled, and therefore the OS will not action the default behaviour. If you remove that line your own code will run, and the OS will also do its own backwards navigation.
Be mindful of Rowland's comment about overriding the Back button - if you're not navigating intuitively you will confuse the user and risk your game being rejected (if you just need to control a pause screen or menu it will be fine, but if you implement something gimmicky like using the Back button as a game control you'll be in trouble).
My blog has the same answer with a bit more detail if you need it:
http://grogansoft.com/blog/?p=572
Whilst it possible to cancel the navigation event, and permissable in a game to present a pause screen or similar, generally it is not allowed to use the back button for anything other than backward navigation in an app; Per requirement 5.2.4 of the Technical certification requirements for Windows Phone
To maintain a consistent user experience, the Back button must only be used for backwards navigation in the app.
If you are creating a XAML app where it is permissible to cancel a "back" operation, such as per 5.2.4.4 of the Technical certification requirements for Windows Phone
:
For games, when the Back button is pressed during gameplay, the game can choose to present a pause context menu or dialog, or it can navigate the user to the prior menu screen.
Then you can implement this by overriding the OnNavigatingFrom method on your page, and set the Cancel property of the NavigatingCancelEventArgs, so something like this example from Frame, page, and navigation features for Windows Phone 8:
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
base.OnNavigatingFrom(e);
// If the navigation can be cancelled, ask the user if they want to cancel
if (e.IsCancelable)
{
MessageBoxResult result = MessageBox.Show("Do you want to stay here?", "Confirm Navigation from Page", MessageBoxButton.OKCancel);
if (result == MessageBoxResult.OK)
{
// User wants to stay here
e.Cancel = true;
return;
}
}
}
Of course, you may choose to implement the prompt differently, but that should illustrate how it is possible.
I have two ScrollViewer's in my layout of windows phone app. I'm trying to synchronize both. i'm using VisualTreeHelper.GetChild to find HorizontalScrollBar and then setting ValueChanged event.
It happens that this event is not called whenever scrollviewer is scrolling, so the other scrollviewer scrolling is not smooth.
I had tried many solutions found in internet but it seems nothing is working for me.
Is there any event that i can subscribe in order to achieve this effect?
NOTE: the content of the first ScrollViewer is much longer than the second one.
Try listening to "mouseMove" event on the scrollviewer that you need to base your adjustment on.
this.MyScrollViewer.MouseMove += MyScrollViewer_MouseMove;
Handle the event in a method like this:
public void MyScrollViewer_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
// Write your manipulation here
}
I'm trying to replicate the behaviour that you can see on the new bing apps on Windows Phone 8. It shows the title of the app on top of the screen, when you tap that area the title slides offscreen and the status-icons slide-in.
I managed to get my titlebar up there and can slide the text off on a tap event.
Problem is I only get the tap event if SystemTray.IsVisible is set to false.
If I set the visibility to true inside my tap event it doesnt force the icons to show so it needs another tap to show the icons.
Does anyone know if I can catch the SystemTray Tap Event or if I can force the icons to show or maybe simulate a touch input?
It's way easier than you think. Just subscribe to the Loaded event of your page, and put a progress indicator in the system tray, displaying the text you want:
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
var progressIndicator = new ProgressIndicator { Text = "Your title", IsVisible = true };
SystemTray.SetProgressIndicator(this, progressIndicator);
}
Note that you can also change the colors by using SystemTray.BackgroundColor and SystemTray.ForegroundColor