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4<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
5<head>
6<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
7<meta name="generator" content="Docutils 0.4.1: http://docutils.sourceforge.net/" />
8<title>MochiKit.Style - painless Style manipulation API</title>
9
10<link rel="stylesheet" href="../../../include/css/documentation.css" type="text/css" />
11<script type="text/javascript" src="../../../packed/MochiKit/MochiKit.js"></script>
12<script type="text/javascript" src="../../js/toc.js"></script>
13</head>
14<body>
15<div class="document">
16<div class="section">
17<h1><a id="name" name="name">Name</a></h1>
18<p>MochiKit.Style - painless Style manipulation API</p>
19</div>
20<div class="section">
21<h1><a id="synopsis" name="synopsis">Synopsis</a></h1>
22<pre class="literal-block">
23var messagePos = getElementPosition('message');
24var messageSize = getElementDimensions('message');
25
26var notifyPos = new MochiKit.Style.Coordinates(
27 messagePos.x + messageSize.w + 10,
28 messagePos.y);
29
30setElementPosition('notify', notifyPos);
31</pre>
32</div>
33<div class="section">
34<h1><a id="description" name="description">Description</a></h1>
35<p>Refactored from <a class="mochiref reference" href="DOM.html">MochiKit.DOM</a>.</p>
36</div>
37<div class="section">
38<h1><a id="dependencies" name="dependencies">Dependencies</a></h1>
39<ul class="simple">
40<li><a class="mochiref reference" href="Base.html">MochiKit.Base</a></li>
41<li><a class="mochiref reference" href="DOM.html">MochiKit.DOM</a></li>
42</ul>
43</div>
44<div class="section">
45<h1><a id="overview" name="overview">Overview</a></h1>
46<p>Refactored from <a class="mochiref reference" href="DOM.html">MochiKit.DOM</a>.</p>
47<div class="section">
48<h2><a id="element-visibility" name="element-visibility">Element Visibility</a></h2>
49<p>The <a class="mochiref reference" href="#fn-hideelement">hideElement</a> and <a class="mochiref reference" href="#fn-showelement">showElement</a> functions are
50provided as a convenience, but only work for elements that are
51<tt class="docutils literal"><span class="pre">display:</span> <span class="pre">block</span></tt>. For a general solution to showing, hiding, and
52checking the explicit visibility of elements, we recommend using a
53solution that involves a little CSS. Here's an example:</p>
54<pre class="literal-block">
55&lt;style type=&quot;text/css&quot;&gt;
56 .invisible { display: none; }
57&lt;/style&gt;
58
59&lt;script type=&quot;text/javascript&quot;&gt;
60 function toggleVisible(elem) {
61 toggleElementClass(&quot;invisible&quot;, elem);
62 }
63
64 function makeVisible(elem) {
65 removeElementClass(elem, &quot;invisible&quot;);
66 }
67
68 function makeInvisible(elem) {
69 addElementClass(elem, &quot;invisible&quot;);
70 }
71
72 function isVisible(elem) {
73 // you may also want to check for
74 // getElement(elem).style.display == &quot;none&quot;
75 return !hasElementClass(elem, &quot;invisible&quot;);
76 };
77&lt;/script&gt;
78</pre>
79<p>MochiKit doesn't ship with such a solution, because there is no
80reliable and portable method for adding CSS rules on the fly with
81JavaScript.</p>
82</div>
83</div>
84<div class="section">
85<h1><a id="api-reference" name="api-reference">API Reference</a></h1>
86<div class="section">
87<h2><a id="functions" name="functions">Functions</a></h2>
88<p>
89<a name="fn-getstyle"></a>
90<a class="mochidef reference" href="#fn-getstyle">getStyle(element, cssSelector)</a>:</p>
91<blockquote>
92<p>Looks up a CSS property for the given element. The element can be
93specified as either a string with the element's ID or the element
94object itself.</p>
95<dl class="docutils">
96<dt><tt class="docutils literal"><span class="pre">cssSelector</span></tt>:</dt>
97<dd>The CSS selector, e.g. <tt class="docutils literal"><span class="pre">background-color</span></tt>.</dd>
98<dt><em>Availability</em>:</dt>
99<dd>Available in MochiKit 1.4+</dd>
100</dl>
101</blockquote>
102<p>
103<a name="fn-setstyle"></a>
104<a class="mochidef reference" href="#fn-setstyle">setStyle(element, styles)</a>:</p>
105<blockquote>
106<p>Set CSS properties on a the given element. The element can be
107specified as either a string with the element's ID or the element
108object itself.</p>
109<dl class="docutils">
110<dt><tt class="docutils literal"><span class="pre">styles</span></tt>:</dt>
111<dd>Dictionnary holding CSS properties to set, e.g.
112<tt class="docutils literal"><span class="pre">{'background-color':</span> <span class="pre">'red',</span> <span class="pre">'opacity':</span> <span class="pre">0.5}</span></tt>.</dd>
113<dt><em>Availability</em>:</dt>
114<dd>Available in MochiKit 1.4+</dd>
115</dl>
116</blockquote>
117<p>
118<a name="fn-setopacity"></a>
119<a class="mochidef reference" href="#fn-setopacity">setOpacity(element, opacity)</a>:</p>
120<blockquote>
121<p>Sets <tt class="docutils literal"><span class="pre">opacity</span></tt> for <tt class="docutils literal"><span class="pre">element</span></tt>. Valid <tt class="docutils literal"><span class="pre">opacity</span></tt> values range
122from 0 (invisible) to 1 (opaque). <tt class="docutils literal"><span class="pre">element</span></tt> is looked up with
123<a class="mochiref reference" href="#fn-getelement">getElement</a>, so string identifiers are also acceptable.</p>
124<dl class="docutils">
125<dt><em>Availability</em>:</dt>
126<dd>Available in MochiKit 1.4+</dd>
127</dl>
128</blockquote>
129<p>
130<a name="fn-getelementdimensions"></a>
131<a class="mochidef reference" href="#fn-getelementdimensions">getElementDimensions(element)</a>:</p>
132<blockquote>
133<p>Return the absolute pixel width and height (including padding and border,
134but not margins) of <tt class="docutils literal"><span class="pre">element</span></tt> as an object with <tt class="docutils literal"><span class="pre">w</span></tt> and <tt class="docutils literal"><span class="pre">h</span></tt>
135properties, or <tt class="docutils literal"><span class="pre">undefined</span></tt> if <tt class="docutils literal"><span class="pre">element</span></tt> is not in the document.
136<tt class="docutils literal"><span class="pre">element</span></tt> may be specified as a string to be looked up with
137<a class="mochiref reference" href="#fn-getelement">getElement</a>, a DOM element, or trivially as an object with
138<tt class="docutils literal"><span class="pre">w</span></tt> and/or <tt class="docutils literal"><span class="pre">h</span></tt> properties.</p>
139<dl class="docutils">
140<dt><em>Availability</em>:</dt>
141<dd>Available in MochiKit 1.4+</dd>
142</dl>
143</blockquote>
144<p>
145<a name="fn-setelementdimensions"></a>
146<a class="mochidef reference" href="#fn-setelementdimensions">setElementDimensions(element, dimensions[, units='px'])</a>:</p>
147<blockquote>
148<p>Sets the dimensions of <tt class="docutils literal"><span class="pre">element</span></tt> in the document from an object
149with <tt class="docutils literal"><span class="pre">w</span></tt> and <tt class="docutils literal"><span class="pre">h</span></tt> properties.</p>
150<p>Warning: IE in quirks-mode seems to behave strange when you set
151the height off an element containing text to 0. You can workaround this
152by setting the value of visibly/display.</p>
153<dl class="docutils">
154<dt><tt class="docutils literal"><span class="pre">element</span></tt>:</dt>
155<dd>A reference to the DOM element to update (if a string is
156given, <a class="mochiref reference" href="#fn-getelement">getElement(node)</a> will be used to locate the
157node)</dd>
158<dt><tt class="docutils literal"><span class="pre">dimensions</span></tt>:</dt>
159<dd>An object with <tt class="docutils literal"><span class="pre">w</span></tt> and <tt class="docutils literal"><span class="pre">h</span></tt> properties. You can also specify only
160one property.</dd>
161<dt><tt class="docutils literal"><span class="pre">units</span></tt>:</dt>
162<dd>Optionally set the units to use, default is <tt class="docutils literal"><span class="pre">px</span></tt></dd>
163<dt><em>Availability</em>:</dt>
164<dd>Available in MochiKit 1.4+</dd>
165</dl>
166</blockquote>
167<p>
168<a name="fn-getelementposition"></a>
169<a class="mochidef reference" href="#fn-getelementposition">getElementPosition(element[, relativeTo={x: 0, y: 0}])</a>:</p>
170<blockquote>
171<p>Return the absolute pixel position of <tt class="docutils literal"><span class="pre">element</span></tt> in the document
172as an object with <tt class="docutils literal"><span class="pre">x</span></tt> and <tt class="docutils literal"><span class="pre">y</span></tt> properties, or <tt class="docutils literal"><span class="pre">undefined</span></tt> if
173<tt class="docutils literal"><span class="pre">element</span></tt> is not in the document. <tt class="docutils literal"><span class="pre">element</span></tt> may be specified
174as a string to be looked up with <a class="mochiref reference" href="#fn-getelement">getElement</a>, a DOM
175element, or trivially as an object with <tt class="docutils literal"><span class="pre">x</span></tt> and/or <tt class="docutils literal"><span class="pre">y</span></tt>
176properties.</p>
177<p>If <tt class="docutils literal"><span class="pre">relativeTo</span></tt> is given, then its coordinates are subtracted
178from the absolute position of <tt class="docutils literal"><span class="pre">element</span></tt>, e.g.:</p>
179<pre class="literal-block">
180var elemPos = getElementPosition(elem);
181var anotherElemPos = getElementPosition(anotherElem);
182var relPos = getElementPosition(elem, anotherElem);
183assert( relPos.x == (elemPos.x - anotherElemPos.x) );
184assert( relPos.y == (elemPos.y - anotherElemPos.y) );
185</pre>
186<p><tt class="docutils literal"><span class="pre">relativeTo</span></tt> may be specified as a string to be looked up with
187<a class="mochiref reference" href="#fn-getelement">getElement</a>, a DOM element, or trivially as an object
188with <tt class="docutils literal"><span class="pre">x</span></tt> and/or <tt class="docutils literal"><span class="pre">y</span></tt> properties.</p>
189<dl class="docutils">
190<dt><em>Availability</em>:</dt>
191<dd>Available in MochiKit 1.4+</dd>
192</dl>
193</blockquote>
194<p>
195<a name="fn-setelementposition"></a>
196<a class="mochidef reference" href="#fn-setelementposition">setElementPosition(element, position[, units='px'])</a>:</p>
197<blockquote>
198<p>Sets the absolute position of <tt class="docutils literal"><span class="pre">element</span></tt> in the document from an
199object with <tt class="docutils literal"><span class="pre">x</span></tt> and <tt class="docutils literal"><span class="pre">y</span></tt> properties.</p>
200<dl class="docutils">
201<dt><tt class="docutils literal"><span class="pre">element</span></tt>:</dt>
202<dd>A reference to the DOM element to update (if a string is
203given, <a class="mochiref reference" href="#fn-getelement">getElement(node)</a> will be used to locate the
204node)</dd>
205<dt><tt class="docutils literal"><span class="pre">position</span></tt>:</dt>
206<dd>An object with <tt class="docutils literal"><span class="pre">x</span></tt> and <tt class="docutils literal"><span class="pre">y</span></tt> properties. You can also specify only
207one property.</dd>
208<dt><tt class="docutils literal"><span class="pre">units</span></tt>:</dt>
209<dd>Optionally set the units to use, default is <tt class="docutils literal"><span class="pre">px</span></tt></dd>
210<dt><em>Availability</em>:</dt>
211<dd>Available in MochiKit 1.4+</dd>
212</dl>
213</blockquote>
214<p>
215<a name="fn-setdisplayforelement"></a>
216<a class="mochidef reference" href="#fn-setdisplayforelement">setDisplayForElement(display, element[, ...])</a>:</p>
217<blockquote>
218<p>Change the <tt class="docutils literal"><span class="pre">style.display</span></tt> for the given element(s). Usually
219used as the partial forms:</p>
220<ul class="simple">
221<li><a class="mochiref reference" href="#fn-showelement">showElement(element, ...)</a></li>
222<li><a class="mochiref reference" href="#fn-hideelement">hideElement(element, ...)</a></li>
223</ul>
224<p>Elements are looked up with <a class="mochiref reference" href="#fn-getelement">getElement</a>, so string
225identifiers are acceptable.</p>
226<p>For information about the caveats of using a <tt class="docutils literal"><span class="pre">style.display</span></tt>
227based show/hide mechanism, and a CSS based alternative, see
228<a class="reference" href="#element-visibility">Element Visibility</a>.</p>
229<dl class="docutils">
230<dt><em>Availability</em>:</dt>
231<dd>Available in MochiKit 1.4+</dd>
232</dl>
233</blockquote>
234<p>
235<a name="fn-showelement"></a>
236<a class="mochidef reference" href="#fn-showelement">showElement(element, ...)</a>:</p>
237<blockquote>
238<p>Partial form of <a class="mochiref reference" href="#fn-setdisplayforelement">setDisplayForElement</a>, specifically:</p>
239<pre class="literal-block">
240partial(setDisplayForElement, &quot;block&quot;)
241</pre>
242<p>For information about the caveats of using a <tt class="docutils literal"><span class="pre">style.display</span></tt>
243based show/hide mechanism, and a CSS based alternative, see
244<a class="reference" href="#element-visibility">Element Visibility</a>.</p>
245<dl class="docutils">
246<dt><em>Availability</em>:</dt>
247<dd>Available in MochiKit 1.4+</dd>
248</dl>
249</blockquote>
250<p>
251<a name="fn-hideelement"></a>
252<a class="mochidef reference" href="#fn-hideelement">hideElement(element, ...)</a>:</p>
253<blockquote>
254<p>Partial form of <a class="mochiref reference" href="#fn-setdisplayforelement">setDisplayForElement</a>, specifically:</p>
255<pre class="literal-block">
256partial(setDisplayForElement, &quot;none&quot;)
257</pre>
258<p>For information about the caveats of using a <tt class="docutils literal"><span class="pre">style.display</span></tt>
259based show/hide mechanism, and a CSS based alternative, see
260<a class="reference" href="#element-visibility">Element Visibility</a>.</p>
261<dl class="docutils">
262<dt><em>Availability</em>:</dt>
263<dd>Available in MochiKit 1.4+</dd>
264</dl>
265</blockquote>
266<p>
267<a name="fn-getviewportdimensions"></a>
268<a class="mochidef reference" href="#fn-getviewportdimensions">getViewportDimensions()</a>:</p>
269<blockquote>
270<p>Return the pixel width and height of the viewport as an object
271with <tt class="docutils literal"><span class="pre">w</span></tt> and <tt class="docutils literal"><span class="pre">h</span></tt> properties.</p>
272<dl class="docutils">
273<dt><em>Availability</em>:</dt>
274<dd>Available in MochiKit 1.4+</dd>
275</dl>
276</blockquote>
277<p>
278<a name="fn-getviewportposition"></a>
279<a class="mochidef reference" href="#fn-getviewportposition">getViewportPosition()</a>:</p>
280<blockquote>
281<p>Return the pixel position of the viewport inside the window, as a
282<a class="mochiref reference" href="#fn-coordinates">Coordinates</a> object.</p>
283<dl class="docutils">
284<dt><em>Availability</em>:</dt>
285<dd>Available in MochiKit 1.4+</dd>
286</dl>
287</blockquote>
288</div>
289<div class="section">
290<h2><a id="objects" name="objects">Objects</a></h2>
291<p>
292<a name="fn-coordinates"></a>
293<a class="mochidef reference" href="#fn-coordinates">Coordinates(x, y)</a>:</p>
294<blockquote>
295<p>Constructs an object with <tt class="docutils literal"><span class="pre">x</span></tt> and <tt class="docutils literal"><span class="pre">y</span></tt> properties. <tt class="docutils literal"><span class="pre">obj.toString()</span></tt>
296returns something like <tt class="docutils literal"><span class="pre">{x:</span> <span class="pre">0,</span> <span class="pre">y:</span> <span class="pre">42}</span></tt> for debugging.</p>
297<dl class="docutils">
298<dt><em>Availability</em>:</dt>
299<dd>Available in MochiKit 1.4+</dd>
300</dl>
301</blockquote>
302<p>
303<a name="fn-dimensions"></a>
304<a class="mochidef reference" href="#fn-dimensions">Dimensions(w, h)</a>:</p>
305<blockquote>
306<p>Constructs an object with <tt class="docutils literal"><span class="pre">w</span></tt> and <tt class="docutils literal"><span class="pre">h</span></tt> properties. <tt class="docutils literal"><span class="pre">obj.toString()</span></tt>
307returns something like <tt class="docutils literal"><span class="pre">{w:</span> <span class="pre">0,</span> <span class="pre">h:</span> <span class="pre">42}</span></tt> for debugging.</p>
308<dl class="docutils">
309<dt><em>Availability</em>:</dt>
310<dd>Available in MochiKit 1.4+</dd>
311</dl>
312</blockquote>
313</div>
314</div>
315<div class="section">
316<h1><a id="authors" name="authors">Authors</a></h1>
317<ul class="simple">
318<li>Bob Ippolito &lt;<a class="reference" href="mailto:bob&#64;redivi.com">bob&#64;redivi.com</a>&gt;</li>
319<li>Beau Hartshorne &lt;<a class="reference" href="mailto:beau&#64;hartshornesoftware.com">beau&#64;hartshornesoftware.com</a>&gt;</li>
320</ul>
321</div>
322<div class="section">
323<h1><a id="copyright" name="copyright">Copyright</a></h1>
324<p>Copyright 2005-2006 Bob Ippolito &lt;<a class="reference" href="mailto:bob&#64;redivi.com">bob&#64;redivi.com</a>&gt;, and Beau Hartshorne
325&lt;<a class="reference" href="mailto:beau&#64;hartshornesoftware.com">beau&#64;hartshornesoftware.com</a>&gt;. This program is dual-licensed free
326software; you can redistribute it and/or modify it under the terms of
327the <a class="reference" href="http://www.opensource.org/licenses/mit-license.php">MIT License</a> or the <a class="reference" href="http://www.opensource.org/licenses/afl-2.1.php">Academic Free License v2.1</a>.</p>
328</div>
329</div>
330
331</body>
332</html>