Whenever i press the Back or previous button on the blackberry simulator everytime it asks whether to save cancel or discard? I don't want that to be shown at all .Please anybody help me to remove that.
ok you can do the following to remove it.
protected boolean onSavePrompt() {
return true;
}
You consume the event by returning true. Hence the prompt is not shown
Related
I'm working on a NativeScript-Angular app for both Android and iOS but have hit a problem with standard back button navigation. I have resolved the issue for Android, but cannot find a solution for iOS.
The event is causing a problem when going back to a particular page where routing data is expected, resulting in the exception:
"Error: Currently in page back navigation - component should be reattached instead of activated".
My Android solution catches the back button event and cancels it, then calls the router to do the navigation.
ngOnInit() {
if (app.android) {
app.android.on(app.AndroidApplication.activityBackPressedEvent,
(args: any) => this.backEvent(args));
}
}
backEvent(args) {
args.cancel = true;
this.backToRegister(false);
}
backToRegister(accepted: boolean){
this.router.navigate(['/register',
this.registerParametersEntered.password,
this.registerParametersEntered.confirmPassword,
this.registerParametersEntered.code,
this.registerParametersEntered.email,
accepted]);
}
I want to do something similar with iOS, such as: -
if (app.ios) {
this.page.on('navigatingFrom', (data) => {
// TODO cancel the back button event
this.backToRegister(false);
})
}
I can't find a way of doing this for iOS - my research is leading me to the conclusion it is not possible to cancel the iOS back button - for example, see here.
Any ideas or alternative suggestions greatly appreciated!
You can't override the back button for iOS. See this SO question. You basically need to create a custom button, you can mimic the appearance of the back button on iOS and add your own event handler. That's how you'd do it in a native iOS app, and how you do it in NativeScript since the native controls are used via NativeScript.
The actionbar in nativescript can have a custom layout inside or you can just use an action-item and position it on the left for iOS, while also hiding the button on Android if you desire.
Another solution would be, instead of catching the back button event just to throw it away/disable it - to just clear the history after you are switching a page where there no "back" to go to.
this.router.navigate(['level1'], {
clearHistory: true
}
In my OSX Electron app I have a tray icon that I would like to toggle between opening and closing the Electron app window. Similar to how clicking on the OSX Dropbox tray icon will open and close the Dropbox tray menu, no matter how fast you click the tray icon.
Here is the code I'm using:
tray.on('click', function(e){
if (mainWindow.isVisible()) {
mainWindow.hide()
} else {
mainWindow.show()
}
});
This works if you click slowly (wait a second between clicks) however if you click repeatedly, more than 1x in a second, the click fails and nothing happens. I couldn't find any type of delays in the docs. Any ideas on what's going on and how to make the click event work reliably?
The problem you're describing is easy to reproduce. The result you're getting is not a bug or a wrong implementation on your side but it's the expected result regarding the current way Electron is handling these click events on a tray element.
The class Tray exposes 3 events relative to click: click, double-click and right-click.
If you use the right-click event, you're not going to have this issue, you can click as fast as you want, you'll get your callback called every times.
The Electron code for macOS for example to handle this event is the following:
- (void)rightMouseUp:(NSEvent*)event {
trayIcon_->NotifyRightClicked(
[self getBoundsFromEvent:event],
ui::EventFlagsFromModifiers([event modifierFlags]));
}
For every right click, they're firing the right-click event and that's it.
Now if we take a look at how the left click are handled, the code is slightly different:
- (void)mouseUp:(NSEvent*)event {
// ...
// Truncated to only show the relevant part...
// ...
// Single click event.
if (event.clickCount == 1)
trayIcon_->NotifyClicked(
[self getBoundsFromEvent:event],
ui::EventFlagsFromModifiers([event modifierFlags]));
// Double click event.
if (event.clickCount == 2)
trayIcon_->NotifyDoubleClicked(
[self getBoundsFromEvent:event],
ui::EventFlagsFromModifiers([event modifierFlags]));
[self setNeedsDisplay:YES];
}
When the tray icon get clicked multiple times, the event.clickCount doesn't always return 1. Instead, it returns a value that counts the clicked times.
So when you're click the tray icon very fast, event.clickCount will have a value greater than 2 and they're only emitting an event when the value is 1 or 2 and if it's not the case, they don't have any fallback, they simply don't emit any event. That's the result you're seeing in your tests when clicking fast enough.
So without modifying the Electron implementation yourself, submitting an issue or a pull request, you can't at the moment avoid this behaviour.
Electron 3.0 introduced an API that prevents waiting for double-click.
// Ignore double click events for the tray icon
tray.setIgnoreDoubleClickEvents(true)
"Sets the option to ignore double click events. Ignoring these events allows you to detect every individual click of the tray icon. This value is set to false by default."
Related Docs | Release Notes for Electron 3.0
I am using Flash Pro cs6, AS3, Air3.8.. And I am using textfield for input. I am trying to make it so when the user presses "Done" it shifts to the next field. I am finding conflicting information about this on all the forums, including this one. I did search but never found a fix..
I am definitely receiving the events, and I tried adding a line that identifies the keycode, which has confirmed it is receiving keycode 13. I actually made it put the keycode into the field I want the focus to shift to successfully.. It just refuses to put focus on that field..
The code I am using is stated in the docs that it will not work in iOS.. BUT it DOES work further along on the same page of script, as well as on two other ones... I have:
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyhandler);
function keyhandler(event:KeyboardEvent){
if(event.charCode == 13)
{
stage.removeEventListener(KeyboardEvent.KEY_DOWN,keyhandler);
stage.focus = null;
stage.focus = nextTextField;
}
}
I tried that while adding the listener to the text field first, then changed it to the stage, neither work.. I tried "requestsSoftKeyboard" and several other ways I have seen posted that supposedly work in iOS, but they didn't work.. There are other functions that use the same stage.focus to null, followed by stage.focus to MyTextField and they work, but they are initiated by pressing a button on the stage, NOT a button on the soft keyboard. The code there that works is just a standard if statement:
if (TextField == "")
{
stage.focus=null;
stage.focus=TextField;
}else if (NextTextField == "")
{
stage.focus = null;
stage.focus = NextTextField;
}else if (TextFieldAfterThat == "")
{
stage.focus = null;
stage.focus = TextFieldAfterThat;
}
That continues through all fields and always goes to the right one with the soft keyboard open, cursor blinking, and ready to type.. every time. I know the listeners are received from the soft keyboard "Done" because a function to capitalize the words works, and when I added code to confirm the keycode it worked. I also have found access to that value using "charcode" AND "keycode".. I do not know what the difference is, but both returned 13 and neither worked for me..
There is another place I use the same code to make a TextField active and set the focus after the user presses a radio button, and those all work every time.
I am not sure what the difference is coming from pressing "Done" vs. pressing an object on the stage, but it refuses to set the focus with the done button.
Anyone have any ideas or made this work before?
I had success assingning focus to a StageText in iOS like this:
stageText.assignFocus();
StageText offers many advantages over TextField because it shows a native text input. The only disadvantage I know is that you can't use custom fonts.
Here's the documentation, and a tutorial.
I haven't experimented with the "Done" key, but I did what you are trying to achieve with "Enter" key and it worked. Also take note that in iOS the "Done" key is meant to hide the keyboard, so that could be why you are having these problems..
With component FPTextField you can listen to the event click DONE. In this video, compared StageText and FPTextField: http://www.youtube.com/watch?v=BKYaoLtEmCU
Use ane library FPNativeUI: http://flashpress.ru/blog/ane/native-ui/?lang=en
I'm using Delphitwain (delphitwain.sourceforge.net) to add scan functionality to my app. Everything was fine, when i click scan button on my app it will show scan mode with scanner's Properties such as Page Size, Scanning Side (canon dr-3010c) and there is a Scan button and Cancel button. If i click cancel of course all the properties back to it's value before.
How can I show this Scanner's Properties only to change properties without Scan, since i can do scan without showing properties
Twain.LoadLibrary;
Twain.LoadSourceManager;
Twain.Source[CurrentSource].Loaded := TRUE;
Twain.Source[CurrentSource].TransferMode := TTwainTransferMode(0);
Twain.Source[CurrentSource].EnableSource(True, True);
while Twain.Source[CurrentSource].Enabled do Application.ProcessMessages;
Twain.UnloadLibrary;
Twain.Source[CurrentSource].EnableSource(True, True);
The first True for ShowUI and the second True for Modal
I know it can be achieved 'cos i've seen another application that can show scanner's properties without scan, only OK and Cancel button, i've searched google all over but no luck, or maybe it just the limitation of the delphitwain component? Thanks, any suggestion appreciated
It has a boolean property in TTwainSource class named ShowUI. Using that property, you can control whether native UI of the scanner should be shown or not.
But take note that some scanners show their UI forcefully whether you set ShowUI to True or False.
In my Delphi application I have a custom Yes, No, Cancel dialogue, which will be called from the main form to confirm saving the changes made to the current file edited. This would normally be achieved by messageDlg() but I wanted this dialogue to have customised looks, so I am trying to achieve this functionality by
case myDialogue.showModal of
mrYes: <<save changes>>;
mrNo: <<quit application without saving changes>>
mrCancel: <<set the closeAction to caNone and do nothing>>
end;
The problem is that, by default, the form reacts to pressing the Escape key by returning mrNo TModalResult. And you can see how BAAAD this is, since your intuition tells you that Esc-aping the modal dialogue will CANCEL the intended Quit Application process, but in fact what happens is you issue a Don't save any changes command and application quits.
I have not noticed this behaviour until I lost an hour's work in this fashion. No FormKeyPressed event handler or anything responding to key presses was put into the myModalDialogue code. It just so works that pressing the Esc in forms shown using showModal will return mrNo. How can I override this default behaviour?
You need to make sure that the Cancel property of the "No" button is False, and that the Cancel property of the "Cancel" button is True.
Set the Cancel and Default properties of the buttons in your dialog.