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Problem with Cancel button

7 posts

blue_harvester#

Problem with Cancel button

On the first page of my installer I ask the user to select the installation directory of another piece of dependent software. The installer then checks if a certain file within this directory exists. If it exists the installation will continue. If it doesn't exist an MB_OK message box will be displayed and the user can then re-enter the installation directory.

Here is the code:


Function MainScreen1



    try_again:

        !insertmacro MUI_INSTALLOPTIONS_DISPLAY "Main_Screen_1.ini"



        !insertmacro MUI_INSTALLOPTIONS_READ $var_FL_INSTALL_DIR "Main_Screen_1.ini" "Field 4" "State"



        IfFileExists $var_FL_INSTALL_DIR\config\policy finish not_installed



    not_installed:

        MessageBox MB_OK|MB_ICONSTOP  "The software is not installed in the specified directory." IDOK try_again

    

    finish:



FunctionEnd
However, if the user hits Cancel when the incorrect directory is currently selected the "Are you sure you want to quit setup?" message box appears, which is all well and good, but when Yes is clicked the "The software is not installed in the specified directory." message box gets displayed!!

How do I get round this? Is there a best practice way of doing this sort of thing?
Red Wine#
you need to set up a validation custom function, you can't use the same IO function as show and leave.
your code is an infinite loop, don't you see it?

you may want to refer to included IO examples.
blue_harvester#
Originally posted by Red Wine
you need to set up a validation custom function, you can't use the same IO function as show and leave.
your code is an infinite loop, don't you see it?

you may want to refer to included IO examples.
Yeah I see the infinite loop it's just I wanted to know if there was a way around it. I'll have a look at the included IO examples like you suggest.
Red Wine#
page custom MainScreen1_show MainScreen1_leave
Function MainScreen1_show

 

        !insertmacro MUI_INSTALLOPTIONS_DISPLAY "Main_Screen_1.ini"



FunctionEnd
Function MainScreen1_leave



        !insertmacro MUI_INSTALLOPTIONS_READ $var_FL_INSTALL_DIR "Main_Screen_1.ini" "Field 4" "State"



        IfFileExists $var_FL_INSTALL_DIR\config\policy finish not_installed



    not_installed:

        MessageBox MB_OK|MB_ICONSTOP  "The software is not installed in the specified directory." IDOK 0

    Abort

    finish:



FunctionEnd
Afrow UK#
It might be a good idea to check `$var_FL_INSTALL_DIR\config\policy\*.*`. This will perform a directory check rather than a file check (policy could be a file and therefore the directory path would be invalid).

-Stu