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Only show controls for WebGL settings when WebGL is used

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This commit is contained in:
Andreas Hocevar
2014-04-22 16:29:53 +02:00
parent 16d7999deb
commit 32dda342aa
2 changed files with 15 additions and 14 deletions
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11
examples/bind-input.html
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@@ -35,6 +35,7 @@
<p id="shortdesc">Demonstrates two-way binding of HTML input elements to OpenLayers objects.</p>
<div id="docs">
<p>See the <a href="bind-input.js" target="_blank">bind-input.js source</a> to see how this is done.</p>
<p id="has-webgl" style="display: none">With the <a href="?renderer=webgl">WebGL renderer</a>, <strong>hue</strong>, <strong>saturation</strong>, <strong>contrast</strong> and <strong>brightness</strong> can also be controlled.</p>
<div id="no-webgl" class="alert alert-warning" style="display: none">
<h4>Warning!</h4>
A browser that supports <a href="http://get.webgl.org/">WebGL</a> is required to change the
@@ -53,14 +54,16 @@
</label>
<label>opacity</label>
<input id="opacity" type="range" min="0" max="1" step="0.01"/>
</fieldset>
<fieldset id="webgl" style="display: none">
<label>hue</label>
<input id="hue" class="webgl" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/>
<input id="hue" type="range" min="-3.141592653589793" max="3.141592653589793" step="0.01"/>
<label>saturation</label>
<input id="saturation" class="webgl" type="range" min="0" max="5" step="0.01"/>
<input id="saturation" type="range" min="0" max="5" step="0.01"/>
<label>contrast</label>
<input id="contrast" class="webgl" type="range" min="0" max="2" step="0.01"/>
<input id="contrast" type="range" min="0" max="2" step="0.01"/>
<label>brightness</label>
<input id="brightness" class="webgl" type="range" min="-1" max="1" step="0.01"/>
<input id="brightness" type="range" min="-1" max="1" step="0.01"/>
</fieldset>
</form>
</div>

18
examples/bind-input.js
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@@ -6,21 +6,19 @@ goog.require('ol.layer.Tile');
goog.require('ol.source.OSM');
if (!ol.BrowserFeature.HAS_WEBGL) {
var inputs = document.getElementsByClassName('webgl');
for (var i = 0, len = inputs.length; i < len; i++) {
inputs[i].disabled = true;
}
var info = document.getElementById('no-webgl');
/**
* display warning message
*/
info.style.display = '';
function checkWebGL(evt) {
document.getElementById('no-webgl').style.display =
ol.BrowserFeature.HAS_WEBGL ? 'none' : '';
document.getElementById('has-webgl').style.display =
ol.BrowserFeature.HAS_WEBGL && !evt.glContext ? '' : 'none';
document.getElementById('webgl').style.display =
evt.glContext ? '' : 'none';
}
var layer = new ol.layer.Tile({
source: new ol.source.OSM()
});
layer.once('precompose', checkWebGL);
var view = new ol.View2D({
center: [0, 0],