Javascript

Titanium

Creating [object] in a different context than the calling function.

On 19 August 2016 by admin

Creating [object] in a different context than the calling function. This warning occured when a JS callback function is passed to Objective-C as KrollCallback and then executed on non-JS thread. Problem with this warning is, if the JS callback create Ti.Network.HTTPClient instance, then that instance is null. To fix, get krollContext instance of current module/proxy […] Read More

Titanium

Titanium app hex color value with alpha channel

On 7 November 2014 by admin

Color values are represented in hexadecimal value: #000000 0 – red, 0 – green, 0 – blue color = black #ffffff 255 – red, 255 – green, 255 – blue color = white ‘ff’ in hexadecimal is 255 in decimal, (2 ^ 8) – 1 = 255. In CSS, to represent color with alpha channel, […] Read More

Notes

JS parseBool()

On 6 November 2014 by admin

This function cast any variable into type ‘boolean’ […] Read More

Titanium

Lazyloading JS modules in Titanium app

On 1 November 2014 by admin

In NodeJS project, usually modules are loaded at the beginning of the file: When this NodeJS application being run, it loads all of the dependencies & start executing the program. In large application, there will be delay before the application can start operating, because of the dependencies loading. For desktop or server application, this won’t […] Read More

Titanium

Webview evalJS return null in Android 4.2.2

On 3 October 2013 by admin

I have a webview that points to external URL In test.html I have a global variable On webview onload event, evalJS(‘myvar’) return null, and inside log message got “Timeout waiting to evaluate JS”. After a few days try & error, test and compare, finally I found the culprit is within tiapp.xml file. My tiapp.xml has […] Read More

Titanium

Indirect code execution flow

On 12 September 2013 by admin

Intro: we have an Android app, with typical main and detail window structure. Let’s see this situation: when user tap a button on main window and then open a detail window, later when user closes the detail window, it needs to update the main window UI. Here, we have two method of how to update […] Read More

Titanium

Titanium app components interaction using events and callbacks

On 14 August 2013 by admin

Events Events are used to broadcast an action happened to zero or many receipients. Example, in a list of items, when user click on ‘Load more’ button at the bottom of the list, at least 2 actions need to be executed simultaneously – show the loading indicator and start fetching more data from web service. […] Read More

Titanium

Object oriented Javascript with CommonJS in Titanium app

On 7 August 2013 by admin

Class definition Use normal javascript function as class definition. Follow certain class / function naming convention to make sure you are not confused between a class or a function. For example, class name use Pascal case (ClassName), while function name use camel case (isFunctionName). Public / private methods By utilising the scope of function or […] Read More