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Diffstat (limited to 'doc/scripting.qdoc')
| -rw-r--r-- | doc/scripting.qdoc | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/doc/scripting.qdoc b/doc/scripting.qdoc index bb547a0d6..1dde6576a 100644 --- a/doc/scripting.qdoc +++ b/doc/scripting.qdoc @@ -94,7 +94,7 @@ \li Reference to the \l QInstaller of the component \row \li component - \li Reference to the \l Component of the component + \li Reference to the \l{https://doc.qt.io/qtinstallerframework/qinstaller-component.html}{Component}. of the component \endtable \section1 Message Boxes @@ -375,4 +375,28 @@ \li ApplicationsDirX64 \li \c {C:\Program Files} \endtable + + \section1 Using postLoad in Component Script + By default, component scripts are evaluated before the install tree view + is shown. This can have performance cost if there is a huge amount of + components with component scripts. The \c postLoad attribute introduces a way + to evaluate the component script right before installation starts, only for + the components that are selected for installation or update: + \code + <Script postLoad="true">my_install_script.qs</Script> + \endcode + Whether \c postLoad can be set to \c true must be considered case by case, + depending on the contents of the script. For example, if the script contents + affect the install tree view, like setting \c <Default> to \c true, setting + new dependencies, or adding new wizard pages, \c postLoad must not be used or + it must be set to \c false. If the script contains only methods + that are run during the installation, \c postLoad can be set to \c true. For + example, all overridden \c operation functions are run during installation. + For more information, see \l {Adding Operations to Components}. If you are not + sure when to use \c postLoad, then don't use it. The performance cost is + huge only when there are thousands of scripts to be evaluated. + + Both \c <Script postLoad="true"> and \c <Script> tags can be used at the same time. + This means that one component can have one script that is evaluated when the installation + starts and another script that is evaluated before the install tree view is shown. */ |