010 Editor – Fix not showing help file
... Or how to re-register a help file for Qt Assistant
010 Editor is my favorite multiplatform HEX Editor, but the current Version (7.0.2 by the time of writing) seems to have a problem with the help system on my machine (Kubuntu running xfce). Fortunately, 010 Editor is using the Qt Assistant help system for displaying his help, so I was able to fix the problem by myself.
Analyzing the problem
First, I checked the command line 010 Editor is issuing to show the help system. To do this, first show the process ID of the running assistant. We will need it for the next step.
> ps -A | grep assistant
Afterwards, I checked the command line used to display Qt Assistant:
> cd /proc/[id]/ > cat cmdline
Which is in my case:
/home/mib/Tools/010Editor7/assistant -collectionFile /home/mib/Tools/010Editor7/010Editor.qhc -enableRemoteControl
As said before 010 Editor is written in Qt and Qt Assistant stores his help configuration in an SQLite database:
> cd home/mib/Tools/010Editor7
> file 010Editor.qhc 010Editor.qhc: SQLite 3.x database
Re-register the help file for Qt assistant
If you check the assistant tool, you will find some helpful commands to register a new help file:
> ./assistant -help
Usage: assistant [Options] -collectionFile file Uses the specified collection file instead of the default one -showUrl url Shows the document with the url. -enableRemoteControl Enables Assistant to be remotely controlled. -show widget Shows the specified dockwidget which can be contents, index, bookmarks or search. -activate widget Activates the specified dockwidget which can be contents, index, bookmarks or search. -hide widget Hides the specified dockwidget which can be contents, index bookmarks or search. -register helpFile Registers the specified help file (.qch) in the given collection file. -unregister helpFile Unregisters the specified help file (.qch) from the give collection file. -setCurrentFilter filter Set the filter as the active filter. -remove-search-index Removes the full text search index. -rebuild-search-index Re-builds the full text search index (potentially slow). -quiet Does not display any error or status message. -help Displays this help.
But to register an already registered file we have to delete the old information from the Database. To do this, I use DB Browser for SQLite.
-> DB Browser for SQLite -> 010Editor -> Browse Data -> NameSpace Table ->Delete the Namespace Record
/home/mib/Tools/010Editor7/assistant -collectionFile /home/mib/Tools/010Editor7/010Editor.qhc -register /home/mib/Tools/010Editor7/010Editor.qch
That's it :-)