2012-05-21 20:32:26 +00:00
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<html>
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<head>
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<title>mxGraph - Known Issues</title>
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2012-09-28 07:03:08 +00:00
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<link rel="stylesheet" href="css/manual-styles.css">
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<link rel="stylesheet" href="css/manual-colors.css">
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2012-05-21 20:32:26 +00:00
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<script type="text/javascript" src="js/toc.js"></script>
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</head>
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<body onload="maketoc(document.getElementById('toc'), false);">
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<h1>mxGraph Known Issues</h1>
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<h2>Table Of Contents</h2>
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<div id="toc"></div>
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<br/>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Doctypes"></a>Doctypes</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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VML in IE should only be used in quirks mode. You can use any DOCTYPE in the page
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and force IE into quirks mode by using the following first two lines in HTML:
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</p>
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<pre>
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<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=5" ><![endif]-->
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<!DOCTYPE html>
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</pre>
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<p>
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This will use the specified DOCTYPE in all browsers but IE.
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</p>
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<p>
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In IE8 and IE9, which support the X-UA-Compatible directive, this will force quirks mode.
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In IE 6 and 7, which do no support the X-UA-Compatible directive, the DOCTYPE will be ignored
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because it is preceeded by non-space characters (in this case a comment which is interpreted
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only by IE 8 and IE 9).
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</p>
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<p>
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The conditional comment is required for all other browsers to pick up the DOCTYPE correctly.
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</p>
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<p>
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To use IE7 standards mode in IE 7, 8 and 9, replace IE=5 with IE=7 in the content attribute.
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</p>
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<p>
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See <a href="http://msdn.microsoft.com/en-us/library/cc288325(VS.85).aspx">this</a>
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and <a href="http://stackoverflow.com/questions/941100/can-html-comments-appear-before-the-doctype-declaration">this</a>
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for details.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="IE8"></a>Support for IE8 standards mode</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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Experimental support for IE8 standards mode is available. The use of quirks mode or
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IE7 standards mode is recommended for performance reasons.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="IE9"></a>Support for SVG in Microsoft Internet Explorer 9</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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Please use the following meta tag to enable SVG in IE9:
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</p>
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<pre>
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<meta http-equiv='X-UA-Compatible' content='IE=5,IE=9'/>
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</pre>
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<p>
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Note that <code>IE=5</code> is required for IE versions prior to 9 to render VML. To use
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IE7 standards mode <code>IE=5</code> can be replaced with <code>IE=7</code>.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Focus"></a>Focus</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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2013-04-04 11:51:15 +00:00
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Firefox and Webkit do not allow to programmatically focus DIVs by default. Since
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2012-05-21 20:32:26 +00:00
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this affects handling of key events, here is a workaround to allow the
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focus to be transferred to a DIV that acts as a graph container even if
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a shape is clicked (click on the background works normally). The workaround
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2013-04-04 11:51:15 +00:00
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is based on the fact that programmatically setting the focus on a DIV
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is possible if the tabindex attribute of the DIV is set as described
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2012-05-21 20:32:26 +00:00
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<a href="http://www.barryvan.com.au/2009/01/onfocus-and-onblur-for-divs-in-fx/">here</a>.
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</p>
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<pre>
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2013-04-04 11:51:15 +00:00
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if (mxClient.IS_NS)
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2012-05-21 20:32:26 +00:00
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{
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mxEvent.addListener(graph.container, 'mousedown', function()
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{
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2012-09-28 07:03:08 +00:00
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if (!graph.isEditing())
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{
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graph.container.setAttribute('tabindex', '-1');
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graph.container.focus();
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2012-05-21 20:32:26 +00:00
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}
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});
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}
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</pre>
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<p>
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2013-04-04 11:51:15 +00:00
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Note that the DIV will have a focus border as a side-effect which can be disabled
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using outline:none CSS property. Also note that the focus is transferred normally
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if the DIV receives a double click, the above solution is just for single-clicks.
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2012-05-21 20:32:26 +00:00
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="TransparentHtmlLabels"></a>Opacity style in HTML labels</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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There is a problem in Webkit (Chrome, Safari) where HTML labels with
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2013-07-19 09:51:30 +00:00
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opacities other than 1 inside foreignObjects are not rendered at the
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correct location. As a workaround, try using the textOpacity style for
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the cell instead as follows:
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<pre>
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graph.setHtmlLabels(true);
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graph.insertVertex(parent, null, '<span style="background:yellow;">Hello</span>', 20, 20, 80, 30, 'textOpacity=50');
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</pre>
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For different CSS opacities inside the label, try using
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<code>mxClient.NO_FO = true</code> before rendering the graph.
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2012-05-21 20:32:26 +00:00
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Chrome5LocalFiles"></a>Local XHR in Chrome</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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2012-09-28 07:03:08 +00:00
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Chrome does not load files from the local filesystem via XHR by default.
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This affects the loading of resources if examples are viewed via the file://
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2012-05-21 20:32:26 +00:00
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protocol. To enable the loading of such files you should use the new flag
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2012-09-28 07:03:08 +00:00
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<code>--allow-file-access-from-files</code>.
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2012-05-21 20:32:26 +00:00
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</p>
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<p>
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See security section for 5.0.335.0 release
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<a href="http://googlechromereleases.blogspot.com/">here</a>.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="ClippedLabels"></a>Clipped labels</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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For clipped labels (overflow:hidden or mxGraph.isLabelClipped returns true)
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it is possible that event handling remains as if the label was unclipped.
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There are several browsers and versions that show this behaviour.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="LocalFiles"></a>Scrollable labels in Webkit</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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For labels that contain HTML markup with scrollbars in Webkit (Safari and
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Chrome) you should disable the use of foreignObject to make sure the HTML
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is not embedded in the SVG node hierarchy. This is because Webkit has a bug
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where mouse events are ignored in any scrollbars in a foreignObject. To
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disable foreignObjects, the following code can be used:
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</p>
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<pre>mxClient.NO_FO = mxClient.NO_FO || mxClient.IS_SF || mxClient.IS_GC;</pre>
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<p>
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<a href="http://code.google.com/p/chromium/issues/detail?id=35545">Bug Report</a>
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="LocalFiles"></a>Local Files</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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For enabling the functionality in mxUtils.save and mxUtils.open for reading
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and writing local files, the security settings for the page need to be
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changed to enabled or prompt for <i>Initialize and script ActiveX controls
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not marked as save for scripting</i> in IE 7.
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</p>
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<p>
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To enable local file access in Firefox, the page must be loaded using the
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file:// protocol.
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<a href="http://www.mozilla.org/projects/security/components/signed-scripts.html">This</a>
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article also states the the access works for signed scripts, however, this
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has not been tested.
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</p>
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<p>
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For mxUtils.saveAs in Firefox, the same restrictions apply. However, the
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function may be used in IE7 without any client-side settings.
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</p>
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<p>
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2012-09-28 07:03:08 +00:00
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For local file access in Firefox, you may have to go to about:config and
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2012-05-21 20:32:26 +00:00
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change security.fileuri.strict_origin_policy to false. (If some language
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2012-09-28 07:03:08 +00:00
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properties are missing in Firefox, this is most likely the cause for the
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2012-05-21 20:32:26 +00:00
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problem.) This is only required for local file access and not for
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production software deployed on a webserver.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Rotation"></a>Rotation</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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Support for rotation is limited to the shape display. Text labels, handles,
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selection bounds and perimeter points are currently not rotated. Support
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for rotation is limited to SVG/VML dialects in the client, as well as the
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mxGraphics2DCanvas in Java and the mxGdiCanvas in C#. PHP does not
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currently support rotation in GD.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="EventOrder"></a>Order of Events in IE</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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When adding listeners for DOM events using mxEvent in IE, which in turn
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uses attachEvent, then the order in which listeners are invoked for a
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specific event is not as listeners have been added. This is a known bug.
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There is no workaround for this problem.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Printing"></a>Printing</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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Printing does not work in Firefox 1.5 (bug 314707). However, it works in
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Firefox 2.0 and later. In Internet Explorer 6 on Windows XP (no
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service pack) and Internet Explorer 7 on Windows Server 2003 SP1
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enterprise, SP2 beta build 2825 enterprise and SP2 beta build 2805
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data center there is a
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<a href="http://www.eggheadcafe.com/software/aspnet/29075807/vml-content-created-by-sc.aspx">known issue</a>
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with printing VML content created by script.
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</p>
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<p>
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In Firefox and Internet Explorer, all content that is wider than one page
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is cropped when printed. Please use mxPrintPreview for printing across
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multiple pages.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Statusbar"></a>Statusbar</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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The status bar is used to display information while the DOM is being
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updated. Therefore, it is not possible to display this information in the
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DOM (as it is being updated). Unfortunately, Firefox and IE do not allow
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scripts to change the status bar. (IE 6 allows it.)
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</p>
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<p>
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To enable updates of the status bar in IE 7, you can change the security
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setting of the respective zone in Internet Options, Security, Custom Level,
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Scripting, Allow status bar updates via script.
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</p>
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<p>
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To enable updates of the status bar in Firefox, you can set the
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configuration setting via about:config, dom.disable_window_status_change to
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false.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="AccessDenied"></a>Access Denied in IE</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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The latest version of IE does no longer allow to read files from the local
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filesystem. This means that all files must be loaded from a webserver, or
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the native XMLHTTP support must be disabled.
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</p>
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<p>
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To allow loading files from the local filesystem in IE, you must disable
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native XMLHTTP support in Internet Options, Advanced, Security. Keep in
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mind that loading the client from the local filesystem should only be
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used for development. In production, the page containing the client and
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all files should be loaded from a webserver via HTTP.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="FontRendering"></a>Font Rendering</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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In Firefox (including 2.0), the fonts are sometimes cropped at the end of a
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line (some pixels missing). On the Mac, the text sometimes completely
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disappears. The problem seems to be fixed in Firefox 3.0 for Windows. A
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possible workaround is to change the width of the window by at least 1
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pixel.
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</p>
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<p>
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<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=368879">Bug Report</a>
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</p>
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2017-04-12 12:48:34 +00:00
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<h3><a id="LabelBoundingBox"></a>Label Bounding Box</h3>
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2012-05-21 20:32:26 +00:00
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<p>
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In Firefox, the SVG-function getBBox for vertex- and edgelabels is one step
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behind zoom. This means, the bounding box for overlapping labels and the
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label background and border might appear smaller or larger than the text
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after zooming. The display can be updated by panning the graph at least 1
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pixel.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="Linefeeds"></a>Linefeeds</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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Linefeeds are converted into &#xa; at encoding time. However, in shared
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diagram sessions the linefeeds (\n) are kept. When sending such XML back to
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the client all linefeeds must be replaced with &#xa;. If you need a
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different encoding you can change the mxEditor.prototype.linefeed and
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mxSession.prototype.linefeed variables. In general, the encoding of
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linefeeds is specified when a DOM node is serialized using the
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mxUtils.getXml(node, linefeed) method. The optional linefeed argument is
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the string to be used for encoding linefeeds and defaults to &#xa;.
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</p>
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2017-04-12 12:48:34 +00:00
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<h2><a id="RunSlowly"></a>Scripts Run Slowly Error in IE</h2>
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2012-05-21 20:32:26 +00:00
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<p>
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This error (<i>A script on this page is causing internet explorer to run
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slowly</i>) in IE (all supported versions including IE 7) is triggered by
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the script engine executing more than 5 million operations (see
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<a href="http://support.microsoft.com/kb/175500">http://support.microsoft.com/kb/175500</a>).
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A workaround for this problem is using the threads provided with
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<a href="http://gears.google.com/" target="_blank">Google Gears</a>
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or using worker threads in HTML 5.
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</p>
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<p>
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Another workaround is to set the
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<code>HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Styles</code>
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DWORD value of <code>MaxScriptStatements</code> to hex <code>7fffffff</code>
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and reboot. Warning: According to the Knowledge Base article, "serious
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problems might occur if you modify the registry".
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</p>
|
2017-04-12 12:48:34 +00:00
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|
<h2><a id="BodyBorder"></a>Body, HTML Borders</h2>
|
2012-05-21 20:32:26 +00:00
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|
|
<p>
|
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|
|
|
When using a style definition for the body or HTML element that makes the
|
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|
|
|
border invisible, such as none or 0px for the border-width, then there is a
|
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|
|
|
strange behaviour in IE after dragging cells into the graph. Another click
|
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|
|
|
is required to stop the respective tool from being inserted again into the
|
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|
|
|
graph. Currently, the only known workaround is not to use the style
|
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|
|
|
definition for invisible borders. Invisible borders for body and HTML
|
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|
|
|
elements are the default setting and the bug does not occur if the border
|
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|
|
|
is set to something visible, such as 1px solid black.
|
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|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="HtmlLabels"></a>HTML Labels</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
HTML labels are supported in SVG browsers via the mxGraph.htmlLabels
|
|
|
|
|
switch. mxGraph.isHtmlLabel(mxCell) may be overridden to return individual
|
|
|
|
|
values for cells. The following are known limitations for HTML labels:
|
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|
|
|
</p>
|
|
|
|
|
<ul>
|
|
|
|
|
<li>Oversize labels consume events on transparent regions. This limitation
|
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|
|
|
exists in all browsers.</li>
|
|
|
|
|
<li>Zoom does only work for text content. This limitation exists in all non-IE
|
|
|
|
|
browsers, eg. Firefox.</li>
|
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|
|
|
<li>Drag and drop (eg. connections) starting at inner img has same cell in
|
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|
|
|
dispatch loop.</li>
|
|
|
|
|
<li>Vertical/rotated HTML labels are not supported in Opera.</li>
|
|
|
|
|
<li>In SVG-based browsers, the labels appear on top of all SVG in a separate
|
|
|
|
|
layer.</li>
|
|
|
|
|
</ul>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="SvgContainer"></a>SVG Container</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
In Firefox, the size of the SVG element is updated to be the size of the
|
|
|
|
|
graph whenever the graph changes. However, since there is no resize event
|
|
|
|
|
fired by the parent container of the SVG element, the SVG element may have
|
|
|
|
|
to be manually resized if the parent element is larger than the graph. The
|
|
|
|
|
effect of this is that if the container of the SVG element is made larger
|
|
|
|
|
without updating the SVG element's size, then the SVG element (and hence
|
|
|
|
|
the drawing area) will appear smaller than the container of the graph.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="Opera"></a>Opera</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
Support for Opera 9 is currently experimental. There are several known
|
|
|
|
|
issues, such as no context menu, cropping in SVG canvas, ignored
|
|
|
|
|
beforeunload handler and drag and drop from toolbar not working. For
|
|
|
|
|
displaying the context menu in Opera (and on Mac), hold down the shift key
|
|
|
|
|
while clicking the (left) mouse button.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="Safari"></a>Safari</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
For the context menu to appear in Safari on the Mac, hold down the shift
|
|
|
|
|
key while clicking the (left) mouse button. Safari does not provide the
|
|
|
|
|
beforeunload event. Also, vertical labels are not working in Safari on the
|
|
|
|
|
Mac.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="Webkit"></a>Webkit (Safari and Google Chrome)</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
For some container positions there are artifacts in Safari and Google
|
|
|
|
|
Chrome when repainting dynamic SVG elements (eg. highlights and previews).
|
|
|
|
|
This is due to a bug in the Webkit repaint code. Also, the value for text
|
|
|
|
|
opacity is currently ignored in Webkit.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="PHPStroke"></a>PHP and strokewidths</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
The strokewidth is currently ignored in some GD implementations, as the
|
|
|
|
|
imagesetthickness function is not working properly.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="XDomXHR"></a>Cross-domain AJAX</h2>
|
2012-05-21 20:32:26 +00:00
|
|
|
<p>
|
|
|
|
|
Cross-domain AJAX requests are generally not allowed, so make sure all
|
|
|
|
|
requests are kept within the same domain of the page that contains the
|
|
|
|
|
client. By default, XHR is used for loading the JS files (development
|
|
|
|
|
only), the properties files (i18n) and the XML files (config). In
|
|
|
|
|
production, there is only a single JS file which is not loaded using XHR,
|
|
|
|
|
however, the files for i18n and configuration are still loaded using XHR
|
|
|
|
|
and should therefore be placed in the same domain.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
|
|
|
|
For example, if the translations are missing in the UI you should make sure
|
|
|
|
|
the respective properties files are stored in the same domain as the page
|
|
|
|
|
that contains the client. In this specific case, if you are using IIS, you
|
|
|
|
|
should also check if the MIME type for properties files has been registered
|
|
|
|
|
correctly. If no MIME type has been registered for the .properties
|
|
|
|
|
extension then please do so in the IIS console under IIS, MIME types.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
|
|
|
|
Note that the evaluation distribution uses a hosted version of mxClient. If
|
|
|
|
|
you are experiencing cross-domain security problems using the evaluation
|
|
|
|
|
version then you should upgrade to the commercial version as it includes
|
|
|
|
|
all required files.
|
|
|
|
|
</p>
|
|
|
|
|
<p>
|
|
|
|
|
There is a known issue where Firefox does not load properties files from
|
|
|
|
|
the local filesystem (file:// protocol) if the mxClient.js files is loaded
|
|
|
|
|
from a different domain (evaluation). This problem goes away when using
|
|
|
|
|
HTTP.
|
|
|
|
|
</p>
|
2017-04-12 12:48:34 +00:00
|
|
|
<h2><a id="AndroidStockBrowser"></a>Android stock browser virtual keyboard</h2>
|
2013-06-28 19:07:06 +00:00
|
|
|
<p>
|
|
|
|
|
In Chrome 18 Mobile a bug prevents the keyboard from appearing after a double
|
|
|
|
|
tap event. Another tap on the selected text can be used as a workaround. The
|
|
|
|
|
underlying problem is that the touchend event cannot be used as a context to
|
|
|
|
|
focus a text control on this browser, and click events are not consistently
|
|
|
|
|
handles.
|
|
|
|
|
</p>
|
2012-05-21 20:32:26 +00:00
|
|
|
<hr size="1">
|
2017-04-12 12:48:34 +00:00
|
|
|
© 2006-2017 by JGraph Ltd.
|
2012-05-21 20:32:26 +00:00
|
|
|
</body>
|
|
|
|
|
</html>
|
