23 Nov 2012 5:16 PM #1
Unanswered: Button show/hide doesn't work until screen tap
I have developed my app for iOS and it works fine, but am now having to deal with various strange issues on Android.
I have a button in my navigation bar that I hide and show. The strange thing is, if I show the button eg. with this.getDictionaryEntryButton().show() it doesn't appear until I tap the screen. Same thing happens when I hide the button. It doesn't hide until I tap the screen.
I've also noticed the same problem in my list view. If I add a new item to the list, it doesn't appear until I tap the screen.
I'm using a Samsung Galaxy Tab 2 7.0"
Is there some sort of refresh or something I can use to force these components to appear?
26 Nov 2012 6:10 AM #2
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- Mar 2007
- Gainesville, FL
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Sounds like the browser isn't repainting when it needs to. I can see this happening if the button is hidden when you try to show it but not when you try to hide it while it's already shown.Mitchell Simoens @LikelyMitch
Sencha Inc, Senior Software Engineer
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26 Nov 2012 6:01 PM #3
You're right about that - I have a carousel and I hide or show my 'edit' button in the naviagation bar depending on whether the card in the carousel currently being shown is editable or not. If I go straight to an editable card (from a list view), the button shows correctly without having to tap. And if I swipe to say the previous card that is not editable, the button is hidden correctly without having to tap. But if I then go back to the editable card, the button doesn't display until I tap the screen.
Is there any way to force the browser (the problem only occurs on Android so Chrome browser) to repaint correctly?
27 Nov 2012 3:29 PM #4
Strange, I've noticed that if I do a quick short swipe on the carousel (so that my finger doesn't go all the way to the edge of the screen) then the button shows/hides correctly!
29 Nov 2012 3:47 PM #5
The solution is to forget Sencha's references all together and use plain old Javacript (this is the latest in a series of ongoing issues I've had with Sencha References and Controls not working properly).
So this is the code I was using to show the button which didn't work (dictionaryEntryButton is a Ref to the button in the navigation bar with id = dictionaryEntryButton)
var dict_button = document.getElementById('dictionaryEntryButton'); dict_button.style.visibility = 'visible';