Set _q_readonly property for online-help (cppcheck-opensource#2890)

c72578 · web-flow · commit 4a057c181373 · 2020-11-08T15:06:14.000+01:00
- Setting _q_readonly disables the timestamp check of the registered
  online-help.qch file
- This enables displaying of Contents and Index of the online help,
  even if the timestamp of online-help.qch is slightly different.
  Differences in the timestamp can result from packing online-help.qch
  in a cab file, when building the installer (1 or 2 seconds) or from
  installing the file under a different timezone under Linux etc.
- Remark: Qt 5.14 or newer is required to display Contents or Index,
  when the help files are readonly
diff --git a/gui/helpdialog.cpp b/gui/helpdialog.cpp
@@ -66,6 +66,8 @@ HelpDialog::HelpDialog(QWidget *parent) :
     }
 
     mHelpEngine = new QHelpEngine(helpFile);
+    // Disable the timestamp check of online-help.qhc by setting _q_readonly
+    mHelpEngine->setProperty("_q_readonly", QVariant::fromValue<bool>(true));
     mHelpEngine->setupData();
 
     mUi->contents->addWidget(mHelpEngine->contentWidget());

Original file line number	Diff line number	Diff line change
`@@ -66,6 +66,8 @@ HelpDialog::HelpDialog(QWidget *parent) :`
`66`	`66`	`}`
`67`	`67`
`68`	`68`	`mHelpEngine = new QHelpEngine(helpFile);`
	`69`	`+ // Disable the timestamp check of online-help.qhc by setting _q_readonly`
	`70`	`+ mHelpEngine->setProperty("_q_readonly", QVariant::fromValue<bool>(true));`
`69`	`71`	`mHelpEngine->setupData();`
`70`	`72`
`71`	`73`	`mUi->contents->addWidget(mHelpEngine->contentWidget());`