Bible/text browser programming

[charlesfra...@gmail.com]

I want to write a Bible browser app for mobiles. I have experience programming in perl and python. The unique thing about a Bible browser is the size of the text being displayed. One solution id to only load one book at a time, but this would prevent smooth scrolling between books. How do people normally handle the problem?

[Kahunapule Michael Johnson]

On 05/03/2018 07:36 AM, charlesfra...@gmail.com wrote:

I want to write a Bible browser app for mobiles. I have experience programming in perl and python. The unique thing about a Bible browser is the size of the text being displayed. One solution id to only load one book at a time, but this would prevent smooth scrolling between books. How do people normally handle the problem?

One solution is to just load one chapter at a time, but preload the next and previous chapter as well, in the background, so that by the time someone scrolls to the bottom of the current chapter, the next one is already loaded. If you have room to load a whole book at a time, then this isn't a problem, really...

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Aloha,
Michael Johnson
PO BOX 881143 • PUKALANI HI 96788-1143 • USA
mljohnson.org • Phone: +1 808-333-6921 • Skype: kahunapule

[Aaron Laws]

On Thu, May 3, 2018 at 1:36 PM, <charlesfra...@gmail.com> wrote:

...but this would prevent smooth scrolling between books....

I don't think anyone would mind having to touch a button to get to the next book. Thanks!

[John Dyer]

Charles,

Biblewebapp.com does something like what Michael describes where it loads the requested chapter and then also preloads the previous and next chapters. The main problem I ran into is that I originally allowed it to do the preload while the user was scrolling, but this often resulted in a  jumpy experience. So now it waits until scrolling has stopped to do preloading and pruning unneeded chapters. 

The code is open source so feel free to reuse anything you find. 

JD

On Thu, May 3, 2018 at 12:36 PM <charlesfra...@gmail.com> wrote:

I want to write a Bible browser app for mobiles. I have experience programming in perl and python. The unique thing about a Bible browser is the size of the text being displayed. One solution id to only load one book at a time, but this would prevent smooth scrolling between books. How do people normally handle the problem?

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John Dyer - http://j.hn/

[Ben Dwyer]

The way I do it on javascripture.org is to load the chapter before and after, outside the window. Then when the user scrolls close to the edge of the window, we load in the next/previous chapter. The hard thing is, when loading in the previous chapter, the scroll position jumps, so maintaining that is where the magic happens.