when click on app bar button ..clear the text in textbox in windows phone 7 is not working.
private void ApplicationBarIconButton_Click(object sender, EventArgs e)
{
txtMessage.Text = string.Empty;
UpdateLayout();
}
Please suggest any solutions
This seems to be (as you thought) an issue with the Korean IME itself. Try setting focus to it first:
private void ApplicationBarIconButton_Click(object sender, EventArgs e) {
// Set focus to the page ensuring all TextBox controls are properly commited
// and that the IME session has been correctly closed.
this.Focus();
MessageTextBox.Text = "";
}
Shamelessly copy-pasted, read here for a closer look at the problem.
Related
I work on a Xamarin.Forms app (UWP!). It has a Master-Details architecture. The Master page has a ListView, and each item in it opens a corresponding Detail page. The first Detail page has only a WebView that plays a YouTube video upon loading. The second Detail view has just a placeholder label for now.
Where I switch from first Detail page to the second, the sound of the video from the first Detail page is still heard. And when I switch back to the first Detail page, the video loads again, and now I hear two voices. How can I stop the video upon switching to the second Detail page and resume when going back? If this is not possible, how can I just stop the video upon leaving its Detail page?
I guess I could do something in an overridden OnDisappearing() method of the detail page:
protected override void OnDisappearing()
{
MyWebView.NavigateToString(""); // This does not work, as NavigateToString() is not part of WebView.
base.OnDisappearing();
}
What can I use to stop playing video in WebView?
Could you please tell what I can use to stop playing video in WebView?
For your requirement, you could approach with injecting Eval java script.
private void Button_Clicked(object sender, EventArgs e)
{
string pausefunctionString = #"
var videos = document.querySelectorAll('video');
[].forEach.call(videos, function(video) { video.pause(); });
";
MyWebView.Eval(pausefunctionString);
}
Update
I have re-checked your issue, when you navigate to another page, the WebView has not be released correctly. If you want to stop the WebView video play, you could make it navigate to blank page via custom WebViewRenderer.
[assembly: ExportRenderer(typeof(WebView), typeof(CustomWebViewRender))]
namespace App4.UWP
{
class CustomWebViewRender : WebViewRenderer
{
private Windows.UI.Xaml.Controls.WebView _WebView;
protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
{
base.OnElementChanged(e);
if (Control != null)
{
var source = Element.Source as UrlWebViewSource;
_WebView = new Windows.UI.Xaml.Controls.WebView();
SetNativeControl(_WebView);
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == WebView.SourceProperty.PropertyName)
{
var source = Element.Source as UrlWebViewSource;
if (source.Url == string.Empty)
{
_WebView.NavigateToString(string.Empty);
}
}
}
}
}
Usage
protected override void OnAppearing()
{
base.OnAppearing();
MyWebView.Source = "https://www.youtube.com";
}
protected override void OnDisappearing()
{
MyWebView.Source = string.Empty;
base.OnDisappearing();
}
Xaml
<WebView HeightRequest="500" WidthRequest="500" x:Name="MyWebView"/>
We have an image with a gesture recognizer, which calls the CrossShare.Current.Share method. On Android this works fine but on iOS it does not. No error is thrown and there doesn't seem to be any issues, but the share sheet does not appear and from the user's point of view nothing happens when you click the button.
Have I missed some permissions or something somewhere?
This is my method;
async void On_Share(object sender, EventArgs e)
{
if (CrossConnectivity.Current.IsConnected)
{
var message = "Check out this";
var title = "Share this";
await CrossShare.Current.Share(new ShareMessage { Text = message, Title = title}, new ShareOptions { ExcludedUIActivityTypes = new[] { ShareUIActivityType.PostToFacebook } });
}
else
{
NoInternetLabel.IsVisible = true;
}
}
It doesn't throw any errors and I can step through the method fine - it definitely hits the Share line. This problem is only showing on iOS, Android has no issues.
EDIT: Seems to be working fine (we've tried doing it natively as well - without plugin) but now I'm getting Warning: Attempt to present on whose view is not in the window hierarchy!
I recently received a support ticket that some of our web app's functionality is crashing safari on the iPad. This functionality had no problems prior to the latest iOS 7.0.6 update. We have a few GWT ValueListBoxes that change the DOM when their values are changed. Prior to making the changes, we present the user with a Window.confirm() message to inform them of the effects the changes will have and ask whether or not they would still like to proceed. Since the update, the confirm choices do nothing and Safari crashes. This is only happening on the iPad. The functionality works fine on the desktop browsers (IE, Chrome, Firefox, Safari and the Chrome mobile emulator), but crashes safari on the iPad. Is anyone else having this issue?
Here's a screenshot of the crash:
And here's a sample of the code:
this._view.isPrimaryFoodGen().addValueChangeHandler(new ValueChangeHandler<Boolean>()
{
#Override
public void onValueChange(final ValueChangeEvent<Boolean> event)
{
#SuppressWarnings("unchecked")
ValueListBoxWithOldValue<Boolean> vlb = (ValueListBoxWithOldValue<Boolean>)event.getSource();
if (confirmQuestionChange() ){
changeGroupAndQuestions(CONSTANTS.PRIMARY_FOOD, event.getValue());
}
else {
vlb.setValue(vlb.getOldValue());
}
}
});
public boolean confirmQuestionChange()
{
if (!this._view.isImageCriteriaQuestionsVisible())
{ //questions aren't currently visible
return true;
}
boolean confirmed = Window.confirm("Changing this response will delete image data already collected. Do you wish to proceed?");
return confirmed;
}
Any help on a solution for preventing the crash on the iPad would be greatly appreciated. I have tried focusing on another element prior to calling Window.confirm() in hopes that the overlay and the ValueListBox choices would be removed to stop any JS conflicts, but it hasn't worked.
Am I at the mercy of Apple until the next update fixes this?
Or is there a viable solution?
OK, so it turns out that since I couldn't find a fix to continue using Window.confirm(), I had to implement a solution by changing the onValueChange() and confirmQuestionChange() methods to use a manually created DialogBox instead of Window.confirm(). It isn't the optimal solution, but Safari does not crash on the iPad anymore and users can get their work done. Here are the code changes:
this._view.isPrimaryFoodGen().addValueChangeHandler(new ValueChangeHandler<Boolean>()
{
#Override
public void onValueChange(final ValueChangeEvent<Boolean> event)
{
confirmQuestionChange(CONSTANTS.PRIMARY_FOOD, event);
}
});
public void confirmQuestionChange(final String question, ValueChangeEvent<Boolean> event)
{
final ValueListBoxWithOldValue<Boolean> vlb = (ValueListBoxWithOldValue<Boolean>)event.getSource();
if (!this._view.isImageCriteriaQuestionsVisible()) //questions aren't currently visible, can change them no problem
{
changeGroupAndQuestions(question, vlb.getValue());
}
else{
//the following fix was put in place for issues with Safari on the iPad OPS-76
final DialogBox dialogBox = new DialogBox();
dialogBox.setHTML("<center>Changing this response will delete<br />image data already collected.<br />Do you wish to proceed?</center>");
dialogBox.setAnimationEnabled(true);
Button yesButton = new Button("YES");
Button noButton = new Button("NO");
HorizontalPanel dialogHPanel = new HorizontalPanel();
dialogHPanel.setWidth("100%");
dialogHPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
dialogHPanel.add(noButton);
dialogHPanel.add(yesButton);
noButton.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
vlb.setValue(vlb.getOldValue());
dialogBox.hide();
}
});
yesButton.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
changeGroupAndQuestions(question, vlb.getValue());
dialogBox.hide();
}
});
// Set the contents of the Widget
dialogBox.setWidget(dialogHPanel);
dialogBox.setPopupPosition(180, 425);
dialogBox.show();
}
}
Here's a screenshot:
As you can see, the ValueListBox options close before the DialogBox appears and the screen no longer locks.
I use DrawerLayout widget in Monodroid, ported from this tutorial http://developer.android.com/training/implementing-navigation/nav-drawer.html.
The drawer works fine, however the DrawerOpened and DrawerClosed event handler is never invoked when the drawer is either opened or closed. I use the built-in listener from the widget. The drawer layout is placed in fragment.
Any idea? Help is greatly appreciated.
this.DrawerLayout.DrawerClosed += delegate(object sender, Android.Support.V4.Widget.DrawerLayout.DrawerClosedEventArgs e)
{
this.Activity.ActionBar.SetTitle(Resource.String.ApplicationName);
this.Activity.InvalidateOptionsMenu();
};
this.DrawerLayout.DrawerOpened += delegate(object sender, Android.Support.V4.Widget.DrawerLayout.DrawerOpenedEventArgs e)
{
this.Activity.ActionBar.SetTitle(this.Title);
this.Activity.InvalidateOptionsMenu();
};
this.DrawerLayout.SetDrawerListener(this.DrawerToggle);
I have just come across this problem myself. I believe this event is fired if you set the drawer listener before setting the delegates for the Drawer Opened and Closed events.
So just change your code to this:
this.DrawerLayout.SetDrawerListener(this.DrawerToggle);
this.DrawerLayout.DrawerClosed += delegate(object sender, Android.Support.V4.Widget.DrawerLayout.DrawerClosedEventArgs e)
{
this.Activity.ActionBar.SetTitle(Resource.String.ApplicationName);
this.Activity.InvalidateOptionsMenu();
};
this.DrawerLayout.DrawerOpened += delegate(object sender, Android.Support.V4.Widget.DrawerLayout.DrawerOpenedEventArgs e)
{
this.Activity.ActionBar.SetTitle(this.Title);
this.Activity.InvalidateOptionsMenu();
};
This seemed to work for me.
I'm getting some strange behaviour in the start-up of a Windows app and wondered if anyone could throw any light on what is happening and how to get around it.
The problem is with the start-up of the app - it should show a splash screen then a login form. The code for this is:
[STAThread]
static void Main()
{
Application.ThreadException += Application_ThreadException;
MainForm mainForm = null;
Thread splashThread = new Thread(ShowSplash);
try
{
// set up app
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
// Splash screen
Splash splash = new Splash();
splashThread.Start(splash);
// enable logging
log4net.Config.XmlConfigurator.Configure();
// Create main form
mainForm = new MainForm();
// kill splash
HideForm(splash);
splashThread.Abort();
}
catch (Exception e)
{
splashThread.Abort();
MessageBox.Show(e.Message, "An exception occurred: ", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(0);
}
// start
Login login = new Login();
login.Show();
if (!mainForm.IsDisposed)
{
Application.Run(mainForm);
}
}
static void ShowSplash(object splash)
{
if (!(splash is Splash))
throw new ArgumentException("Splash screen is of wrong type.");
Splash splashForm = (Splash) splash;
splashForm.ShowDialog();
}
// Thread safe hide form
private delegate void HideFormCallback(Form form);
private static void HideForm(Form form)
{
if (form == null || form.IsDisposed)
return;
if (form.InvokeRequired)
{
HideFormCallback d = HideForm;
form.Invoke(d, new object[] { form });
}
else
{
form.Hide();
}
}
So, we're starting up a new thread with the splash screen, setting up the rest of the app in the meantime, then killing the splash screen just before showing the login form.
The problem I'm having is that the login form doesn't have focus when the app starts. The splash screen pops up and goes away as expected. The login form pops up in front of any open windows but doesn't have focus - the folder containing the executable (that I double-clicked to launch) still has focus even when it's behind the login form.
If I comment out all the lines to do with the splash screen, the login form has focus when it appears.
My guess would be that the focus reverts back to the executable folder when the splash screen is hidden but I don't know why the login form doesn't get focus when it launches.
Calling .Focus() on the login form returns null so doesn't work.
Neither form have TopMost or such set on them.
If anyone has any suggestions for what's going on, it would be much appreciated.
This is what I've ended up doing as a somewhat hacky fix:
void LoginView_Shown(object sender, EventArgs e)
{
SetForegroundWindow(Handle);
this.BringToFront();
Activate();
}
[DllImport("user32")]
public static extern int SetForegroundWindow(IntPtr hwnd);