I have two pages Main.xaml which includes only a button and another page timer.xaml which includes a timer. After pressing the button in the main page I want to go to the another page and start timer. I am using following code:
enter code here
**Main Page:**
private void Start_Click(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new Uri("/timer.xaml", UriKind.Relative));
}
**timer Page:**
public Page1()
{
InitializeComponent();
dispatcherTimer.Interval = new TimeSpan(0, 0, 1, 0, 0);
dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
dispatcherTimer.Start();
counter=0;
count.Text = counter.ToString();
}
private void dispatcherTimer_Tick(object sender, EventArgs e)
{
counter++;
count.Text = counter.ToString();
}
I can not see time in the timer page however, after pressing the button it will navigate to the timer page correctly but I can not see updates in my timer page. I am debugging my code and it seems that DistpacherTimer() works correctly but my timer page does not update. Do you know how can I fix this problem?
Finally, I could find the problem. the code that you can see above was not whole code that I have written. Actually, in my real code I was sending a list <> from main page to timer page. Passing data from one page to another page is a little tricky. My main problem was that I did not send the data from main page to timer page in correct way, so that caused problem. Thus, there was nothing wrong with my DispatcherTimer() class or Event handler.
In other words, the code above works well if you do not pass data (e.g. list, array and so on) from a page to another page in a wrong way.
Related
I'm currently developing an Universal Application, but here is a problem. I have a Frame with the TextBox for User Phone Number.
So, I want to change the height of my LayoutRoot (GRID) so it can fits in the free space.
I'm using InputPane.GetForCurrentView().Showing and InputPane.GetForCurrentView().Hiding for that purposes.
Here is my code.
public UserRegistrationAuthorization_PhoneNumber()
{
this.InitializeComponent();
LayoutRootInitialHeight = LayoutRoot.ActualHeight;
InputPane.GetForCurrentView().Showing += UserRegistrationAuthorization_PhoneNumber_Showing;
InputPane.GetForCurrentView().Hiding += UserRegistrationAuthorization_PhoneNumber_Hiding;
}
private void UserRegistrationAuthorization_PhoneNumber_Showing(InputPane sender, InputPaneVisibilityEventArgs args)
{
LayoutRoot.Height = LayoutRoot.ActualHeight - args.OccludedRect.Height;
LayoutRoot.VerticalAlignment = VerticalAlignment.Top;
args.EnsuredFocusedElementInView = true;
}
private void UserRegistrationAuthorization_PhoneNumber_Hiding(InputPane sender, InputPaneVisibilityEventArgs args)
{
// TODO: Get rid of that shit
LayoutRoot.Height = LayoutRootInitialHeight;
args.EnsuredFocusedElementInView = false;
}
When I click outside the TextBox keyboard hides and leaves after that a black hole on the screen. 2
But, the most interesting is that when I press that physical Back Button on my Lumia, keyboard hides normally and my LayoutRoot gets the Frame's initial height.
Is it a bug or I'm doing something wrong?
It happens because by the time you saving your LayoutRootInitialHeight in the constructor, LayoutRoot actually isn't loaded and it's ActualHeight == 0. Then you setting LayoutRoot.Height to 0, so it becomes not visible. So you should probably save your LayoutRootInitialHeight in LayoutRoot's Loaded event handler.
I would also suggest you not to change LayoutRoot's height at all. It causes your whole visual tree to be rendered from scratch and it's bad practise in general. Instead, modify RenderTransform of all necessary elements so they get moved to appropriate positions. RenderTransform is the right way to handle movements and animations on the screen, and you can achieve some nice visual effects with Next button moving up same as keyboard.
Roughly your code can look like this:
<Button Content="Next" VerticalAlignment="Bottom" HorizontalAlignment="Stretch" HorizontalContentAlignment="Center">
<Button.RenderTransform>
<CompositeTransform x:Name="NextButtonTransform" TranslateY="0"/>
</Button.RenderTransform>
</Button>
...
private void UserRegistrationAuthorization_PhoneNumber_Showing(InputPane sender, InputPaneVisibilityEventArgs args)
{
NextButtonTransform.TranslateY = -300;
EnsuredFocusedElementInView = true;
}
private void UserRegistrationAuthorization_PhoneNumber_Hiding(InputPane sender, InputPaneVisibilityEventArgs args)
{
NextButtonTransform.TranslateY = 0;
args.EnsuredFocusedElementInView = false;
}
And more complicated way is to run some storyboard which makes your Next button move up and down in same speed with keyboard, always appearing on top of it. Although, since InputPane.GetForCurrentView().Showing gets fired after keyboard already shown fully, you should hook up all animations to TextBox.GotFocus and TextBox.LostFocus events. On mobile, keyboard is always shown when text box has focus, so it will work nicely.
Windows phone 8.1 new to world. Basic function is back button click. Is that function not working properly is this windows phone 8.1. Is that behavior or i'm made mistake.
Below code using in Homepage but this code calling from all other class too while clicking back. I need to access below method only on Home page .
Please check below code and refer me good solution.
Please look my code:
public HomePage()
{
this.InitializeComponent();
Windows.Phone.UI.Input.HardwareButtons.BackPressed += HardwareButtons_BackPressed;
}
void HardwareButtons_BackPressed(object sender, BackPressedEventArgs e)
{
}
Thanks
It is working properly. The BackPressed event is working app-wide. Two options that come to my mind:
write eventhandler that would recognize the Page in which you currently invoke it - simple example can look like this:
private void HardwareButtons_BackPressed(object sender, Windows.Phone.UI.Input.BackPressedEventArgs e)
{
Frame frame = Window.Current.Content as Frame;
if (frame == null) return;
if (frame.Content is HomePage)
{
e.Handled = true;
Debug.WriteLine("I'm in HomePage");
}
else if (frame.CanGoBack)
{
frame.GoBack();
e.Handled = true;
}
}
second option - subscribe to Windows.Phone.UI.Input.HardwareButtons.BackPressed when you enter the Page and unsubscribe when you leave the Page. Note that in this way there are some pitfalls - you have to handle properly OnNavigatedTo, OnNavigatedFrom, Suspending and Resuming (more about Lifecycle here). Note also that the subscription should be done before others - for example NavigationHelper.
Some remarks - the above code should work, but it also depends on other circumstances:
if there is something other subscribed to BackPressed before (in App.xaml.cs) - remember that usually events are fired in order they were subscribed
check if you are using NavigationHelper - it also subscribes to BackPressed
remember not to subscribe multiple times
remember to allow the User to leave your HomePage
I am developing a Login screen in which the user needs to introduce their data and then submit them.
Considerations which I had: I have thought about using a Page, but eventually I rejected the idea because if I put Login page before the MainPage, then if I go back from MainPage, then it would go to Login page, which is not what I want. And if Login page were after MainPage, then if I execute for instance the app for first time, without being logged in, if I press back, then it would go to MainPage which I don't want as well.
The problem: I decided finally to use a Popup. At the moment looks perfect, but when I want to use a textbox, the Keyboard overlaps that textbox, and what I want is to move the Popup upwards just like a normal page. I don't know if is that possible, otherwise I am willing to hear some alternatives.
Thank you in advance.
In WMAppManifest.xml remove the property of Navigation Page and in you App.xaml.cs you have something like:
private void Application_Launching(object sender, LaunchingEventArgs e)
{
LoadDefautPage();
}
void LoadDefautPage()
{
if (StartForFirstTime)//tombstone local variable
{
if (!IsLoggedIn)//flag save it in IsolatedStorageSettings
{
RootFrame.Navigate(new Uri("/LoginPage.xaml", UriKind.Relative));
}
else
{
RootFrame.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
}
StartForFirstTime = false;
}
}
finally remove Back Entry in MainPage:
protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
{
while (this.NavigationService.CanGoBack)
{
this.NavigationService.RemoveBackEntry();
}
}
It's just an idea, let me know how it goes (:
I am currently doing an application using Swing and i am stuck at a certain point. In my function, i have to link videos from a JList. The problem is i am not sure how to link the videos from the JList. I am using an OpenBrowser class to link the video to the internet. I did consider using JButton but i would have to hardcode it and that would be ugly. Is there any other alternatives to do this? I am in desperate need and would be eternally grateful to whoever that can help me.
Safa :)
If you don't want to open a browser with the video using a selection listener, you can consider the idea of launching it with a double click on a JList entry.
sample code
String[] items = {"i1", "i2", "i3", "i4"};
JList list = new JList(items);
list.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
JList list = (JList)evt.getSource();
if (evt.getClickCount() == 2) { //check if it is a Double-click
int index = list.locationToIndex(evt.getPoint());
// do whatever you want with the entry at that index
}
}
});
Desktp classes to browse some site (sample code):
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI("http://www.google.com");
desktop.browse(uri);
}
The desktop.browse() call will open your favourite browser with the given URL.
I have a client-server application and i am using swing in the client side. My swing client has one main window (jframe) and lots of panels, toolbars and menubar in it.
I want to remove all client action/mouse events (or simply grab and do nothing) while client is waiting response from server by means of glasssPane.
Here is the code i wrote:
private final static MouseAdapter mouseAdapter = new MouseAdapter()
{
public void mouseClicked(MouseEvent e)
{
System.out.println("MouseClicked..!");
}
};
private static Cursor WAIT_CURSOR = Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR);
private static Cursor DEFAULT_CURSOR = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
and
public static void startWaitCursor(JComponent comp)
{
MainWindow root = ((MainWindow) comp.getTopLevelAncestor());
root.getGlassPane().setCursor(WAIT_CURSOR);
root.getGlassPane().addMouseListener(mouseAdapter);
root.getGlassPane().setVisible(true);
}
public static void stopWaitCursor(JComponent comp)
{
MainWindow root = ((MainWindow) comp.getTopLevelAncestor());
root.getGlassPane().setCursor(DEFAULT_CURSOR);
root.getGlassPane().setVisible(false);
}
but i am not able to manage the grab mouse events. Changing cursors at the glassPane is working fine but either i am not able to add mouseAdapter or am not able to make glasssPane become to the top level component.
Any idea?
Thanks.
I realized that my code is working but my problem is threading related. My code was something like:
startWaitCursor();
work(); // server request that takes time
stopWaitCursor();
and changed it to:
startWaitCursor();
SwingUtilities.invokeLater(new Runnable() {
poblic void run() {
try
{
work(); // server request
}
finally
{
stopWaitCursor();
}
by doing this modification i could see the settings i made in the startWaitCursor() method while client is waiting response from the server.
But stil there is a small problem. In startWaitCursor() method i desabled key, mouse and focus events for the glass pane but events are still captured by main frame even glassPane is displayed.
addMouseListener(new MouseAdapter() {});
addMouseMotionListener(new MouseMotionAdapter() {});
addKeyListener(this);
setFocusTraversalKeysEnabled(false);
After server response reached to client and stopWaitCursor() method is invoked the events handled in the main frame.
If i disable the main frame of my application while client is waiting than cursor is not being changed to wait_cursor, if i am not disable the main frame then cursor is being changed but the events are queued.
cheers...
After digging swing threads issues couple of days, i finally found the real answer: SwingWorker
Now my final code is something like,
startWaitCursor();
SwingWorker worker = new SwingWorker() {
public Object doInBackground()
{
doWork(); // time consuming server request
return null;
}
public void done()
{
stopWaitCursor();
}
};
worker.execute();
In startWaitCursor() method i set the glasspane visible (with alpha valued background), display a message to warn the user time consuming job is doing, set the cursor to wait_cursor (hourglass) and consume all the key, mouse events. That is it.
And by using SwingWorker my client is actually responsive (it is working as if no server request is made) but since i display the glasspane and consume all key and mouse events it feels like irresponsive.
What a relief.. SwingWorker rocks...
cheers..