Registry Object

This forum is currently in read-only mode.
From the Asset Store
This is a single chapter from the "Construct Starter Kit Collection". It is the Student Workbook for its Workshop.
  • I'm trying to set a wallpaper image using the Registry object, but first I want to save the location of the user's current wallpaper so it can be set back after the game is closed.

    So I do...

    Start of layout ->

    Open Key (Root = HKEY_CURRENT_USER, Value = '\Control Panel\desktop')

    Set global variable to Registry.ReadValue('Registry.OpenKey')

    That syntax probably isn't exact but I'm sure you'll see what I mean when you try it. My problem so far is that whenever I try to put in that value for the key to open, I get a message saying that the private variable or registry key '\Control Panel\desktop' doesn't exist and it asks if I want to set it, which brings up window to create a private variable if you say yes.

    I've tried it as

    \Control Panel\desktop\wallpaper



    ..pretty much every permeation I can think of those.

    Do registry keys have a format extension I should be using?

    Is the registry object broken (in the .84 build?)

    Is there something wrong with how I'm typing the key?

  • This works:

    + System: Start of layout

    -> Registry: Open key "Control Panel\Desktop" under root HKEY_CURRENT_USER

    -> Text: Set text to Registry.ReadString("WallPaper")

    Strings in Construct use double quotes. Single quotes are only for variable names.

  • Try Construct 3

    Develop games in your browser. Powerful, performant & highly capable.

    Try Now Construct 3 users don't see these ads
  • Thanks, I knew that about the strings/variables.. I was just being stupid and thinking it was supposed to be a variable. That works perfectly, though I still need to use python to update the desktop to the new background. For those interested, here it is...

    //You need to use the ctypes module, already in python after 2.5

    + System: Start of layout
    -> System: Run Script ("import ctypes")[/code:3i234jv2]
    //Code from ROJO, thank you very much!
    [code:3i234jv2]-> Registry: Open key "Control Panel\Desktop\" under root HKEY_CURRENT_USER
    -> System: Set global variable 'OldWallPaper' to Registry.ReadString("Wallpaper")[/code:3i234jv2]
    //Insert your path. It can be something other than BMP, 
    //I've read otherwise while researching but it worked for me.
    [code:3i234jv2]-> Registry: Write string "C:\Users\UserName\Documents\Backgrounds\BG_Name.bmp" to item "WallPaper"[/code:3i234jv2]
    //Set the parameters to be called when updating the desktop
    [code:3i234jv2]-> System: Run Script ("SPI_SETDESKWALLPAPER = 20")
    -> System: Run Script ("SPIF_SENDWININICHANGE = 20")
    -> System: Run Script ("SPIF_UPDATEINIFILE = 0")[/code:3i234jv2]
    //The actual call to update the desktop.
    //Notice that I break the quotes up around the global variable and use the & to add more. 
    //You either need to do that you get an error because its looking for a file path there.
    [code:3i234jv2]-> System: Run Script ("ctypes.windll.user32.SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, " & global('NewWallPaper') & " , SPIF_UPDATEINIFILE or SPIF_SENDWININICHANGE)")
    //All of the above was done under Start of Layout. 
    //When the program closes, reset the path and update desktop again. 
    [code:3i234jv2]+ System: End of application
    -> Registry: Write string global('OldWallPaper') to item "WallPaper"
    -> System: Run Script ("ctypes.windll.user32.SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, " & global('NewWallPaper') & " , SPIF_UPDATEINIFILE or SPIF_SENDWININICHANGE)")[/code:3i234jv2]
    This doesn't alter settings for how the background is shown, I'll add that later today and repost.
Jump to:
Active Users
There are 1 visitors browsing this topic (0 users and 1 guests)