Detecting gestures over WebView on Windows Phone

If you develop Windows Phone apps, you surely had to use the WebView component at least once. Any you must have realized, that it kind of sucks. One of the problems is that it swallows all the gestures and manipulation events. This means you cannot put it into a Pivot, you cannot detect swipe left or right events to navigate to next or previous article .. or can you?

In a recent project, I had to implement exactly the mentioned functionality, swiping between articles displayed in a WebView. I did some research and I could not find any solution. So I had to get creative and I find a way involving JavaScript.

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Highlighting letters in TextBlock in Windows Phone 8.1 and Windows 8.1

In my current project I had to implement an interesting feature for both Windows Phone 8.1 and Windows 8.1 project of the Universal app. The idea is simply. The users want to search for a movie. They enter a search term into a TextBox and a list of results is shown. The results should have the search term highlighted in them.

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Strange combination of HTTPS and Windows Phone 8.1 that can make your app and phone freeze

Last week I came upon a really bizarre problem that you may also find interesting. Lets start with a bit of context.

Tl;Dr: There seems to be a bug in Windows phone 8.1 that can make your app and the phone freezes when displaying images over HTTPS from some servers. Skip to the end of this article to see a video and get the source code.

The Windows Phone app

The app is a Windows Phone 8 shopping app for the biggest Czech online retailer. The main screen of the app contains quite a bit of data, usually about ten carousel with about 10 products and the list of main categories, so about 10 more images.

In worst case the main screen contains over 10 hundred images. It was quite a hassle to make it work well in the Windows Phone 8 SDK (no, rewriting a shopping about with about 70 screens to Windows Phone 8.1 is not feasible). But it work juts fine. Until last week.

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Problems getting paid from the Windows Store, again

I do not make much money on my Windows Phone apps (who does?), but when the payout time comes every couple of months, I expect the money to be delivered. Dealing with Microsoft, I should know better.

Failed payment

Last month I looked into the Dev Center and saw that my scheduled payment failed, telling me to contact the support. So I did. The result was one moth of exchanging email without a solution.

Dealing with support

The Microsoft employee told me that I am in a small group of people with this problem. I do not know if I have such a bad look always be in a problematic supposedly small group, or that the group are not that small. He told me that Microsoft will retry the payment. The payment was supposedly retried on June 24th and succeeded. So they say.

Great news, your June payout was returned due to an internal issue; however, the payout of 5264.17 CZK has been re-attempted and was successfully completed on June 24th. If you have not received the payout then please review this transaction with your bank. Please let me know if you have any further questions.

I never got the money. The employee asked me a few times if I got the money and then resigned, telling me that it is my problem and I should check with my bank. Of course I checked with my bank, they do not have the money. If they had, they would transfer it to my account.

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Implementing Google login in Universal Apps

In a recent project I had to implement Google login to an Universal App. I decided to use the native WebAuthenticationBroker control and the implementation was not as straightforward as I hoped. By implementing Google login I mean getting the authentication token that you can then use with your server API.

WebAuthenticationBroker is a good idea but it is implemented rather poorly. It works differently on Windows 8.1 and Windows Phone 8.1 due to the “AndContinue” pattern that Windows Phone 8.1 forces on you. You can solve this with some ifdefs and platform specific code, as always.

The real problem s that the MSDN sample states it works with Google login but it does not. The sample thinks it gets the authentication token but it does not, it just gets the success code that you have to exchange for the authentication token yourself.

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