CrushBug
14th January 2010 23:28 UTC

nsDialogs and control Z-order
  Greetings. I am trying to add an "Installation Help" link on the MUI 2 Welcome page.

The first problem I had was the Link not showing up as blue and underlined. I fixed that and got the link appearing and functioning with the following code:

PageFunction_WelcomeShow

>;modify the MUI2 Welcome page to include an installation help link


   ;create the installation help link

   ${NSD_CreateLink} 120u 183u 135u 14u "$(Page_Welcome_Link)"

   ; pop the label HWND off of the stack

    Pop $Link_InstallHelp

   ;welcome page fonts/colors are different from other pages, so force the help link to Blue and the current MUI background color

    SetCtlColors $Link_InstallHelp "0x000080" "${MUI_BGCOLOR}"

   ;font should be Blue now, but it wont be underlined, so we need to fix it.

   CreateFont $Link_InstallHelp_font "$(^Font)" "$(^FontSize)" /UNDERLINE

    SendMessage $Link_InstallHelp${WM_SETFONT} $Link_InstallHelp_font 0


    GetFunctionAddress $R0 PageFunction_Welcome_LinkClick

    nsDialogs::OnClick $Link_InstallHelp $R0


FunctionEnd;PageFunction_WelcomeShow 

>

The only problem I have is that it seems that the MUI Welcome label control extends down and slightly overlaps the link control that I have created.

In other programming languages, I can use a .SendToFront command on a control to fix this, but after much searching and source code dumpster-diving, I haven't been able to figure it out in NSIS and MUI and nsDialogs.

How does one send a control to the front on the MUI2 Welcome page via nsDialogs or with SendMessage? Is there some other solution I can use?

MSG
15th January 2010 09:00 UTC

Re: nsDialogs and control Z-order
 

How does one send a control to the front on the MUI2 Welcome page via nsDialogs or with SendMessage? Is there some other solution I can use?

You can call any API command by calling the appropriate DLL function through the system plugin. But it is generally a bad idea to mess with window order, you're much better off calling the getwindowrect and setwindowpos functions to decrease the label size.

CrushBug
15th January 2010 17:16 UTC

Thanks for the reply. I will see what I can pull off with that.

I still wish there was a SendToFront thing I could pull off, because I know it would solve the problem.

Anders
15th January 2010 18:14 UTC

user32::SetWindowPos

CrushBug
15th January 2010 20:02 UTC

I have tried this, but I can still see that the top of my Link text is being cut off

PageFunction_WelcomeShow

>;modify the MUI2 Welcome page to include an installation help link


   ;create the installation help link

   ${NSD_CreateLink} 120u 183u 135u 14u "$(Page_Welcome_Link)"

   ; pop the label HWND off of the stack

    Pop $Link_InstallHelp

   ;welcome page fonts/colors are different from other pages, so force the help link to Blue and the current MUI background color

    SetCtlColors $Link_InstallHelp "0x000080" "${MUI_BGCOLOR}"

   ;font should be Blue now, but it wont be underlined, so we need to fix it.

   CreateFont $Link_InstallHelp_font "$(^Font)" "$(^FontSize)" /UNDERLINE

    SendMessage $Link_InstallHelp${WM_SETFONT} $Link_InstallHelp_font 0


   ;HACK! - try to set the Link control to the top

>!define SWP_NOSIZE 0x0001

>!define SWP_NOMOVE 0x0002

>!define HWND_TOPMOST -1

    System::Call "User32::SetWindowPos(i, i, i, i, i, i, i) b ($Link_InstallHelp, ${HWND_TOPMOST}, 0, 0, 0, 0, ${SWP_NOSIZE}|${SWP_NOMOVE})"


    GetFunctionAddress $R0 PageFunction_Welcome_LinkClick

    nsDialogs::OnClick $Link_InstallHelp $R0


FunctionEnd;PageFunction_WelcomeShow 

>

I have also tried replacing ${SWP_NOSIZE}|${SWP_NOMOVE} with 3 and it still shows as cut off.

I must still be missing something. I will try again later this afternoon.

Anders
16th January 2010 18:37 UTC

you can't use topmost on a child window, try just hwnd_top

CrushBug
17th January 2010 22:11 UTC

Thank you so much Anders; that was it. Here is the final working code. Maybe, once the project is shipped I will write this up for the wiki

PageFunction_WelcomeShow

>;modify the MUI2 Welcome page to include an installation help link


   ;create the installation help link

   ${NSD_CreateLink} 120u 182u 135u 14u "$(Page_Welcome_Link)"

   ; pop the label HWND off of the stack

    Pop $Link_InstallHelp

   ;welcome page fonts/colors are different from other pages, so force the help link to Blue and the current MUI background color

    SetCtlColors $Link_InstallHelp "0x000080" "${MUI_BGCOLOR}"

   ;font should be Blue now, but it wont be underlined, so we need to fix it.

   CreateFont $Link_InstallHelp_font "$(^Font)" "$(^FontSize)" /UNDERLINE

    SendMessage $Link_InstallHelp${WM_SETFONT} $Link_InstallHelp_font 0


   ;move these defines to someplace better in your code

>!define SWP_NOSIZE 0x0001

>!define SWP_NOMOVE 0x0002

>!define HWND_TOP 0x0000

   ;set the Link control on top of the Welcome label text

    System::Call "User32::SetWindowPos(i, i, i, i, i, i, i) b ($Link_InstallHelp, ${HWND_TOP}, 0, 0, 0, 0, ${SWP_NOSIZE}|${SWP_NOMOVE})"


    GetFunctionAddress $R0 PageFunction_Welcome_LinkClick

    nsDialogs::OnClick $Link_InstallHelp $R0


FunctionEnd;PageFunction_WelcomeShow 

>