@pdang/geoext

v2.1.0

Published

3 years ago

A JavaScript Toolkit for Rich Web Mapping Applications based on OpenLayers and ExtJS.

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pdang2812

GIS mapping ExtJS OpenLayers

GeoExt 2

JavaScript Toolkit for Rich Web Mapping Applications.

What is GeoExt?

GeoExt is Open Source and enables building desktop-like GIS applications through the web. It is a JavaScript framework that combines the GIS functionality of OpenLayers with the user interface savvy of the ExtJS library provided by Sencha.

Version 2 of GeoExt is the successor to the GeoExt 1.x-series.

GeoExt 2.1.x is built atop OpenLayers 2.13.1 and ExtJS 5.1.0 and provides full backward compatibility to ExtJS 4.2.1. So GeoExt 2.1 is usable either with ExtJS 5.1 or Ext 4.2.1.

GeoExt 2.0.x is based on OpenLayers 2.13.1 and ExtJS 4.2.1 and is maintained in the v2.0.x-maintenance Branch.

More information on GeoExt 2

Have a look at the official homepage: http://geoext.github.io/geoext2/

You will find examples, API documentation (with and without inherited functionality from ExtJS), links to mailinglists and more over there.

What you see on http://geoext.github.io/geoext2/ are the contents of the gh-pages-branch. If you encounter anything that should be fixed, please issue a pull request against that branch and we will merge it as soon as possible.

Ok, I want to use GeoExt now...

Hey that's a good decision, and it is very easy to get started on a page that already includes ExtJS and OpenLayers:

<!DOCTYPE html>
<html>
    <head>
        <title>Trying out GeoExt2 w/ ExtJS 5.1.0</title>
        <!-- Load the ExtJS stylesheet -->
        <link rel="stylesheet" type="text/css"
          href="http://cdn.sencha.com/ext/gpl/5.1.0/build/packages/ext-theme-neptune/build/resources/ext-theme-neptune-all-debug.css">
        <!-- Load ExtJS from their CDN, local versions work also -->
        <script type="text/javascript"
          src="http://cdn.sencha.com/ext/gpl/5.1.0/build/ext-all-debug.js"></script>
        <!-- Load OpenLayers, custom builds may even be better -->
        <script src="http://openlayers.org/api/2.13.1/OpenLayers.js"></script>
    </head>
    <body></body>
</html>

Or if you are stuck to ExtJS 4.2.x you can use the following code:

<!DOCTYPE html>
<html>
    <head>
        <title>Trying out GeoExt2 w/ ExtJS 4.2.1</title>
        <!-- Load the ExtJS stylesheet -->
        <link rel="stylesheet" type="text/css"
          href="http://cdn.sencha.com/ext/gpl/4.2.1/resources/css/ext-all.css">
        <!-- Load ExtJS from their CDN, local versions work also -->
        <script type="text/javascript"
          src="http://cdn.sencha.com/ext/gpl/4.2.1/ext-debug.js"></script>
        <!-- Load OpenLayers, custom builds may even be better -->
        <script src="http://openlayers.org/api/2.13.1/OpenLayers.js"></script>
    </head>
    <body></body>
</html>

Next, we simply add a <script>-tag in which we tell ExtJS about GeoExt (and also where to find the ExtJS source files):

<script type="text/javascript">
Ext.Loader.setConfig({
    enabled: true,
    disableCaching: false,
    paths: {
        GeoExt: "path/to/src/GeoExt",
        Ext: "http://cdn.sencha.com/ext/gpl/5.1.0/src"
    }
});
</script>

Or reference the ExtJS 4.2.1 sources if you have to use them:

<script type="text/javascript">
Ext.Loader.setConfig({
    enabled: true,
    disableCaching: false,
    paths: {
        GeoExt: "path/to/src/GeoExt",
        Ext: "http://cdn.sencha.com/ext/gpl/4.2.1/src"
    }
});
</script>

That's it. Now you can e.g. create a very basic mappanel and let it reign over the whole browser window:

var mappanel = Ext.create('GeoExt.panel.Map', {
    title: 'A sample Map',
    map: {
        // ...
        // optional, can be either
        //   - a valid OpenLayers.Map configuration or
        //   - an instance of OpenLayers.Map
    },
    center: '12.31,51.48',
    zoom: 6
});

Ext.create('Ext.container.Viewport', {
    layout: 'fit',
    items: [
        mappanel // our variable from above
    ]
});

More information to get started can be grabbed on the main website.

Want to contribute? Yes, please!

We definitely want you to help us making GeoExt. We will happily accept pull requests of any kind; be it documentation improvement, code refactoring or new functionality.

Please sign the contributor agreement and email it to the GeoExt Project Steering Committee (psc [at] geoext.org) prior to submitting your changes. Thanks.

To generate the jsduck documentation

Install jsduck: https://github.com/senchalabs/jsduck
Run jsduck --config jsduck.json in the root of the repository
Optional: If you want the documentation for ExtJS to be linked, edit jsduck.json to point to the proper source location (URLs will not work)
Optional: To refresh screenshots in the example page run ~$ . tools/screenshots.sh http://geoext.github.io/geoext2/examples/
Open the generated file /path/to/your/geoext/docs/index.html in your favorite browser
Enjoy!

To run the test suite

Serve the contents of a GeoExt 2 clone on a webserver, e.g.:
user@machine:/src/geoext2 $ python -m SimpleHTTPServer 2222
Open the main test suite HTML file in a browser:
http://localhost:2222/tests/run-tests.html
Click the button "run all"

Headless tests with casperjs

You can also run the above tests headlessly through casperjs.

# Install dependencies via npm in the GeoExt 2 clone dir (only first time)
npm install

# Run the suite in the root of the repository
npm test

These tests are also run though travis.

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