Can't get ParentWindowHandle

Development Programming & Scripting C++
1

Problem: need to use OpenDirectoryDialog function.

I tried this: FDesktopPlatformModule::Get()->OpenDirectoryDialog()

But, can’t get ParentWindowHandle.

Tried to use this:


    TSharedPtr<SWindow> ParentWindow = FSlateApplication::Get().FindWidgetWindow(AsShared());
    const void* ParentWindowHandle = (ParentWindow.IsValid() && ParentWindow->GetNativeWindow().IsValid())
        ? ParentWindow->GetNativeWindow()->GetOSWindowHandle()
        : nullptr;

from https://answers.unrealengine.com/questions/395516/opening-a-file-dialog-from-a-plugin.html?sort=oldest thread. But get error “‘AsShared’: identifier not found”.

Also tried this:


const void* ParentWindowHandle = GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle();

but still no luck.

2

AsShared isn’t free function and require object context: instance of class derived from TSharedFromThis<T>. (all classes derived from SWidget)

Are You trying pass a nullptr to OpenDirectoryDialog?

1 Like
3

In case someone is going to have problems with this, solution described here: Unresolved External Symbols - Pipeline & Plugins - Unreal Engine Forums

But basically you need to add “SlateCore” module to your *.Build.cs to to be able to use this:


...GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle()

… as


const void* ParentWindowHandle

within this function:


 
 FDesktopPlatformModule::Get()->OpenDirectoryDialog(GEngine->GameViewport->GetWindow()->GetNativeWindow()->GetOSWindowHandle(), dialogTitle, defPath, folderPath);

P.S. There’s probably more elegant way of doing this. But this worked for me.