New dialog in WiX, clicking Back skips the dialog

Question

I'm newbie in WiX and trying to customize dialog queue by adding the new one. The new dialog's name is ServerChoice and the flow is:

SetupTypeDlg <-> Full or Typical <-> ServerChoice <-> VerifyReadyDlg

or

SetupTypeDlg <-> Custom <-> CustomizeDlg <-> ServerChoice <-> VerifyReadyDlg

The only problem is in the first case at VerifyReadyDlg. 'Back' takes me to SetupTypeDlg and skips ServerChoice although in the second flow it works as required.

Source:

<UI>
        <DialogRef Id="ServerChoice" />
        <Publish Dialog="SetupTypeDlg" Control="TypicalButton" Event="NewDialog" Value="ServerChoice">1</Publish>
        <Publish Dialog="SetupTypeDlg" Control="CompleteButton" Event="NewDialog" Value="ServerChoice">1</Publish>
        <Publish Dialog="CustomizeDlg" Control="Next" Event="NewDialog" Value="ServerChoice">1</Publish>
        <Publish Dialog="ServerChoice" Control="Next" Event="NewDialog" Value="VerifyReadyDlg">1</Publish>
        <Publish Dialog="VerifyReadyDlg" Control="Back" Event="NewDialog" Value="ServerChoice">1</Publish>
        <Publish Dialog="ServerChoice" Control="Back" Event="NewDialog" Value="CustomizeDlg" Order="1">WixUI_InstallMode = "InstallCustom"</Publish>
        <Publish Dialog="ServerChoice" Control="Back" Event="NewDialog" Value="SetupTypeDlg" Order="2">WixUI_InstallMode = "InstallTypical" OR WixUI_InstallMode = "InstallComplete"</Publish>
        <Publish Dialog="ServerChoice" Control="Back" Event="NewDialog" Value="CustomizeDlg" Order="3">WixUI_InstallMode = "Change"</Publish>
        <Publish Dialog="ServerChoice" Control="Back" Event="NewDialog" Value="MaintenanceTypeDlg" Order="4">WixUI_InstallMode = "Repair" OR WixUI_InstallMode = "Remove"</Publish>
    </UI>

Some help for a newbie? :)

Answer 1

What type of UI are you referencing (Mondo?). This information is not present in your piece of code. I think daddyman's comment is right, you probably have multiple events for that Back button, since Mondo itself hooks its own 'handlers' on this button-click event.

I have created a custom UI dialog flow recently and my approach was not referencing WiXUI_Mondo at all. Instead of it, I created my own new UI based on Mondo source code (you have to check WiX sources). At the end I have this code (irrelevant code parts have been removed) and it works fine.

<Fragment>  
    <!-- this is based on the WixUI_Mondo dialog set -->
    <UI Id="WixUI_MyNewUI">
        <TextStyle Id="WixUI_Font_Normal" FaceName="Tahoma" Size="8" />
        <TextStyle Id="WixUI_Font_Bigger" FaceName="Tahoma" Size="12" />
        <TextStyle Id="WixUI_Font_Title" FaceName="Tahoma" Size="9" Bold="yes" />

        <Property Id="DefaultUIFont" Value="WixUI_Font_Normal" />
        <Property Id="WixUI_Mode" Value="Mondo" />

        <DialogRef Id="ErrorDlg" />
        <DialogRef Id="FatalError" />
        <DialogRef Id="FilesInUse" />
        <DialogRef Id="MsiRMFilesInUse" />
        <DialogRef Id="PrepareDlg" />
        <DialogRef Id="ProgressDlg" />
        <DialogRef Id="ResumeDlg" />
        <DialogRef Id="UserExit" />

        <Publish Dialog="WelcomeDlg" Control="Next" Event="NewDialog" Value="CustomizeDlg">1</Publish>
        <!-- we do not use the SetupTypeDlg which allows user to choose either Typical, Complete or Custom installation; this ensures InstallCustom schema is run -->
        <Publish Dialog="WelcomeDlg" Control="Next" Property="WixUI_InstallMode" Value="InstallCustom" Order="2">1</Publish>

        <Publish Dialog="CustomizeDlg" Control="Back" Event="NewDialog" Value="WelcomeDlg" Order="2">WixUI_InstallMode = "InstallCustom"</Publish>
        <Publish Dialog="CustomizeDlg" Control="Next" Event="NewDialog" Value="MyDlg1">1</Publish>

        <Publish Dialog="MyDlg1" Control="Next" Event="NewDialog" Value="VerifyReadyDlg" Order="1">MY_CONDITION_PROPERTY = 0</Publish>
        <Publish Dialog="MyDlg1" Control="Next" Event="NewDialog" Value="MyDlg2" Order="2">MY_CONDITION_PROPERTY = 1</Publish>

        <Publish Dialog="MyDlg2" Control="Next" Event="NewDialog" Value="VerifyReadyDlg" Order="1" />
        <Publish Dialog="MyDlg2" Control="Back" Event="NewDialog" Value="MyDlg1">1</Publish>


        <Publish Dialog="VerifyReadyDlg" Control="Back" Event="NewDialog" Value="MyDlg1" Order="1">WixUI_InstallMode = "InstallCustom" and MY_CONDITION_PROPERTY = 0</Publish>
        <Publish Dialog="VerifyReadyDlg" Control="Back" Event="NewDialog" Value="MyDlg2" Order="2">WixUI_InstallMode = "InstallCustom" and MY_CONDITION_PROPERTY = 1</Publish>      
    </UI>

    <UIRef Id="WixUI_Common" />
    <UIRef Id="WixUI_ErrorProgressText" />
</Fragment>

Answer 2

I think from your fragment that you are trying to do it in a just UI section and I don't believe that is possible. Take a look here http://neilsleightholm.blogspot.com/2008/08/customised-uis-for-wix.html I think it should help.