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Native Window and Editor

Discussion in 'Windows' started by codingstyle, Oct 11, 2017.

  1. codingstyle

    codingstyle

    Joined:
    Jan 2, 2017
    Posts:
    3
    Hello,

    I am working on a Unity native plugin using Win32 APIs to render a webview component on a texture.

    To achieve that, I am creating a separate native window with its own handle. My window class is registered with style CS_HREDRAW | CS_VREDRAW, window is then created with style WS_CAPTION.

    With a standalone build of my project, things work fine. But in Unity Editor, the native window doesn't seem to update, repaint, or process any message until I start moving it manually.

    Is there any tip regarding usage of native windows with Unity standalone app/editor I'm missing?

    Regards,
    Chris
     
    codingstyle, Oct 11, 2017
    #1
    ChernovAnton likes this.

  2. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

    Joined:
    Jul 25, 2013
    Posts:
    10,675
    Is it your window that does not repaint or one of the editor windows? What thread do you create your window on, and are you pumping window messages?
     
    Tautvydas-Zilys, Oct 13, 2017
    #2

  3. codingstyle

    codingstyle

    Joined:
    Jan 2, 2017
    Posts:
    3
    Problem affects my custom window. Editor and standalone windows work normally.

    Window is created during a kUnityGfxDeviceEventInitialize event, but the documentation isn't explicit whether it is executed in the same thread as editor window or not.

    To pump window messages, I use a method called every frame through a GL.IssuePluginEvent() - therefore, on the render thread.
     
    codingstyle, Oct 16, 2017
    #3

  4. Tautvydas-Zilys

    Tautvydas-Zilys

    Unity Technologies

    Joined:
    Jul 25, 2013
    Posts:
    10,675
    That doesn't sound like a good idea: the game loop isn't running when the editor is not in play mode, and I suspect it will make your window stuck since window messages won't be pumped.

    You should instead create a dedicated thread (using native CreateThread or C# System.Threading.Thread), create your window on that thread and pump the messages in a loop until you need to close your window.
     
    Tautvydas-Zilys, Oct 16, 2017
    #4
    codingstyle likes this.