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| <meta name="DC.Title" content="Versioning"/> |
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| <title>Versioning</title> |
| </head> |
| <body id="WS2db454920e96a9e51e63e3d11c0bf69084-7f28_verapache"><a name="WS2db454920e96a9e51e63e3d11c0bf69084-7f28_verapache"><!-- --></a> |
| |
| |
| <h1 class="topictitle1">Versioning</h1> |
| |
| <div> |
| <p>You might encounter some versioning issues when working |
| on Flex applications. When compiling, you |
| can choose the version of the SDK to use and you can target specific |
| versions of Adobe<sup>®</sup> Flash<sup>®</sup> Player. |
| You can replicate behavior of previous SDK versions. Also, you can |
| design applications that can load modules and other SWF files that |
| were compiled with different SDKs.</p> |
| |
| </div> |
| |
| <div class="nested1" id="WS2db454920e96a9e51e63e3d11c0bf61e50-7ffd_verapache"><a name="WS2db454920e96a9e51e63e3d11c0bf61e50-7ffd_verapache"><!-- --></a> |
| <h2 class="topictitle2">Overview of versioning</h2> |
| |
| |
| <div> |
| <p>When a new version of Flex is released, it usually includes |
| changes to the APIs and compiler. As a result, if you were working |
| on a project but then upgraded your version of the SDK, you might |
| have to refactor some part of your code to be compatible with the |
| new version. In addition, if the audience for your application is |
| restricted in which version of Flash Player it can use, you might |
| have to make certain concessions to ensure that your application |
| runs without errors.</p> |
| |
| <p> |
| <strong>Maintain older look and feel</strong> |
| </p> |
| |
| <p>The differences between some versions of Flex go beyond new features. |
| The layout schemes and the styles of many components might have |
| changed from one version to the next. If you want to use new Flex |
| features but have your application look and feel the same as an |
| older version of Flex, you can specify the version whose styles |
| you want to use with the <samp class="codeph">compatibility-version</samp> compiler |
| option. For more information, see <a href="flx_versioning_ve.html#WS2db454920e96a9e51e63e3d11c0bf69084-7ede_verapache">Backward |
| compatibility</a>.</p> |
| |
| <p> |
| <strong>Target specific Player versions</strong> |
| </p> |
| |
| <p>With current Flex tools, you can target your application toward |
| a specific version of Flash Player. To do this, you use the <samp class="codeph">target-player</samp> compiler |
| option. This is not the same as targeting an application to a specific <em>SWF version</em>. |
| For more information, see <a href="flx_versioning_ve.html#WS2db454920e96a9e51e63e3d11c0bf69084-7ee0_verapache">Targeting |
| Flash Player versions</a>. </p> |
| |
| <p> |
| <strong>Ensure sub-applications and applications work together</strong> |
| </p> |
| |
| <p>If you want to load a sub-application into a main application |
| that was compiled with a different version of the compiler, you |
| can use the <samp class="codeph">loadForCompatibility</samp> property of the |
| SWFLoader control. Setting this property ensures that each SWF file |
| contains its own definitions of the linked classes, removing reliance |
| on particular APIs that might have changed between versions. You |
| can only use this property when the main application and sub-application |
| were compiled with version 3.2 of the Flex framework or later. In addition, |
| the main application must be compiled with a more recent or the |
| same version of the compiler as the sub-applications. For more information, |
| see <a href="flx_loading_applications_la.html#WS2db454920e96a9e51e63e3d11c0bf69084-7f0c_verapache">Developing |
| multi-versioned applications</a>.</p> |
| |
| </div> |
| |
| </div> |
| |
| <div class="nested1" id="WS2db454920e96a9e51e63e3d11c0bf69084-7ede_verapache"><a name="WS2db454920e96a9e51e63e3d11c0bf69084-7ede_verapache"><!-- --></a> |
| <h2 class="topictitle2">Backward compatibility</h2> |
| |
| |
| <div> |
| <p>To specify the version of the Flex compiler and framework |
| that the output should be compatible with, use the <samp class="codeph">compatibility-version</samp> compiler |
| option. Possible values for this compiler option are defined as |
| constants in the <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/core/FlexVersion.html" target="_blank">FlexVersion</a> class. This option |
| affects some behavior such as the theme, layout rules, padding and |
| gaps, skins, and other style settings. In addition, it affects the rules |
| for parsing properties files.</p> |
| |
| <p>If you do not explicitly set the value of the <samp class="codeph">compatibility-version</samp> option, the |
| compiler defaults to the current SDK’s version. </p> |
| |
| <p>For the command-line compilers, you can either pass the <samp class="codeph">compatibility-version</samp> compiler |
| option on the command line or set the value in the configuration |
| file. The following example sets the compatibility version to 4.0 |
| in the flex-config.xml file:</p> |
| |
| <pre class="codeblock"> <compiler> |
| <mxml> |
| <compatibility-version>4.0</compatibility-version> |
| <mxml> |
| <compiler></pre> |
| |
| <p>When you set the <samp class="codeph">compatibility-version</samp> option, |
| you must be sure that the configuration files that you use are compatible |
| with the version you select. </p> |
| |
| <p>You can programmatically access the version of the application |
| that you are running by using the <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/core/FlexVersion.html" target="_blank">FlexVersion</a> class. |
| To get the current compatibility version in your application, use |
| the <samp class="codeph">compatibilityVersionString</samp> property of that class. |
| This lets you conditionalize the logic in your application based |
| on the compatibility version.</p> |
| |
| </div> |
| |
| <div class="nested2" id="WS2db454920e96a9e51e63e3d11c0bf61e50-7ffa_verapache"><a name="WS2db454920e96a9e51e63e3d11c0bf61e50-7ffa_verapache"><!-- --></a> |
| <h3 class="topictitle3">Using themes with compatibility-version</h3> |
| |
| |
| <div> |
| <p>When you set the compatibility version, you should also |
| be sure to use the appropriate theme file that matches that version. |
| Themes are located in the frameworks/themes directory. For Flex |
| 4.x, you do not have to specify a theme file. The default Spark |
| theme file is designed for Flex 4.x compatibility. However, if you want |
| the Flex 3 look and feel, you must specify the Halo theme or another |
| theme that is compatible with the Flex 3 SDK. </p> |
| |
| <div class="p">The following command-line example uses the Halo theme and sets <samp class="codeph">compatibility-version</samp> to |
| 3.0.0:<pre class="codeblock">mxmlc -compatibility-version=3.0.0 -theme=..\frameworks\themes\Halo\halo.swc MyApp.mxml</pre> |
| |
| </div> |
| |
| <p>For more information on using themes, see <a href="flx_styles_st.html#WS2db454920e96a9e51e63e3d11c0bf69084-7f85_verapache">About |
| themes</a>. </p> |
| |
| <p>The default style sheets for several versions of Flex are available |
| in the framework.swc file. This SWC file contains the current default |
| style sheet (defaults.css) and the Flex 3 default style sheet (defaults-3.0.0.css). |
| The compiler uses the style sheet that is appropriate for the compatibility |
| version you set. For example, if you set the <samp class="codeph">compatibility-version</samp> option |
| to 3.0, then the compiler uses the Flex 3 default style sheet.</p> |
| |
| </div> |
| |
| </div> |
| |
| <div class="nested2" id="WSda78ed3a750d6b8f-e7e343d123edb6080e-8000_verapache"><a name="WSda78ed3a750d6b8f-e7e343d123edb6080e-8000_verapache"><!-- --></a> |
| <h3 class="topictitle3">Differences between SDK 3 and SDK |
| 4.x</h3> |
| |
| |
| <div> |
| <p>The differences between SDK 3 and SDK 4.x that result from |
| setting the <samp class="codeph">compatibility-version</samp> option include |
| fonts, skins, and styles. </p> |
| |
| <p>If you set <samp class="codeph">compatibility-version</samp> to 3.0.0, differences |
| include:</p> |
| |
| <div class="p"> |
| <ul> |
| <li> |
| <p>The value of <samp class="codeph">embedAsCFF</samp> defaults |
| to <samp class="codeph">false</samp>. This means that non-CFF fonts are embedded, |
| rather than CFF fonts. For more information, see <a href="flx_fonts_ft.html#WS0FA8AEDB-C69F-4f19-ADA5-AA5757217624_verapache">Embedding fonts |
| with MX components</a>.</p> |
| |
| </li> |
| |
| <li> |
| <p>The Halo theme should be used to define the look and feel |
| of your application. This includes styles and skins.</p> |
| |
| </li> |
| |
| <li> |
| <p>Bi-directional binding will not work.</p> |
| |
| </li> |
| |
| </ul> |
| |
| </div> |
| |
| <p>For a list of differences when using the <samp class="codeph">compatibility-version</samp> compiler option, |
| see <a href="http://opensource.adobe.com/wiki/display/flexsdk/Flex+4+Backwards+Compatability" target="_blank">Flex 4: Backward Compatibility</a>.</p> |
| |
| </div> |
| |
| </div> |
| |
| </div> |
| |
| <div class="nested1" id="WS2db454920e96a9e51e63e3d11c0bf69084-7ee0_verapache"><a name="WS2db454920e96a9e51e63e3d11c0bf69084-7ee0_verapache"><!-- --></a> |
| <h2 class="topictitle2">Targeting Flash Player versions</h2> |
| |
| |
| <div> |
| <p>Use the <samp class="codeph">target-player</samp> compiler option |
| to specify the version of Flash Player that you want to target with |
| the application. Features requiring a later version of Flash Player |
| are not compiled into the application.</p> |
| |
| <p>One reason for setting the target Player version is if you are |
| unsure of Player usage penetration rates and want to choose a Player |
| version that is lower than the most recent one. Another reason is |
| if your users are locked in to a particular Player version, such |
| as when they are on an intranet and cannot upgrade.</p> |
| |
| <p>The <samp class="codeph">target-player</samp> option has the following syntax:</p> |
| |
| <pre class="codeblock"> -target-player=<em>major_version</em>.<em>minor_version</em>.<em>revision</em></pre> |
| |
| <p>The <em>major_version</em> is required while <em>minor_version</em> and <em>revision</em> are |
| optional. If you do not specify the <em>minor_version</em> or <em>revision</em>, |
| the compiler uses zero. </p> |
| |
| <p>For Flex 4.0, the only supported value of the <samp class="codeph">target-player</samp> option |
| is 10.0.0. For Flex 4.1, the default value is 10.1.0. For Flex 4.5, |
| the default value is 10.2.0. For Flex 4.6, the default value is |
| 11.1.</p> |
| |
| <p>The minimum value for Flex 4.6 is 11.1. The minimum value for |
| Flex 4.5 is 10.2.0. For Flex 4.0 and 4.1, the minimum value is 10.0.0 |
| (although Flex 4.1 included Player 10.1). </p> |
| |
| <p>If you do not explicitly set the value of this option, the compiler |
| uses the default from the flex-config.xml file.</p> |
| |
| <p> |
| <strong>SWF version (advanced)</strong> |
| </p> |
| |
| <p>The <samp class="codeph">swf-version</samp> compiler option specifies the |
| SWF file format version of the output SWF file. Features requiring |
| a later version of the SWF file format are not compiled into the |
| application. This is different from the Player version in that it refers |
| to the SWF specification versioning scheme. </p> |
| |
| <div class="p">For example, to compile an application to version 10 of the SWF |
| specification, use the following:<pre class="codeblock">-swf-version=10</pre> |
| |
| </div> |
| |
| <p>This is an advanced option that you should only use if you have |
| an understanding of the SWF specification that you are targeting. |
| For information about the SWF specifications, visit the <a href="http://www.adobe.com/devnet/swf.html" target="_blank">SWF |
| Technology Center</a>.</p> |
| |
| </div> |
| |
| <p>Adobe and Adobe Flash Player are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries and are used by permission from Adobe. No other license to the Adobe trademarks are granted.</p> |
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