Renderer Backend for Tk

[nico-robert]

Hello,
I couldn’t find any discussion about that.
I would like to know if you think it would be possible to integrate Dear Imgui in Tk window ?
If yes, would this file imgui_impl_win32.cpp be a good starting point ?

Regards
Nicolas

[rokups]

What you are looking for is how to mix Tk and graphics views (OpenGL/DirectX). There is this example showing how to display OpenGL scene in a Tk application. You could use imgui_impl_opengl3.cpp+imgui_impl_win32.cpp to set up OpenGL scene and display it in a Tk window as shown in linked tutorial.

[nico-robert]

@rokups I will look at this. Thanks

[nico-robert]

I got there...
Now the problem I have, is that the mouse and keyboard are disabled (no problem with imgui_impl_opengl3.cpp + imgui_impl_glfw.cpp) but the focus works (it’s strange...)
I think Tk window takes control.
Do you have any idea what’s going on ?

[rokups]

Look what happens with events, whether they are correctly passed to Dear ImGui. Debug ImGui_ImplWin32_WndProcHandler in imgui_impl_win32.cpp.

[nico-robert]

If I understand , and if I follow this example main.cpp (from examples/example_win32_directx9)
ImGui_ImplWin32_WndProcHandler is a callback ? (I'm using cimgui bindings and noobs in c++ ) but I see that WndProc is declared in a WNDCLASSEX struct to be included to ::CreateWindow.
In my case my window is not created with Windows API .
Do you think it can work the same way ?

[sergeyn]

You use ImGui_ImplWin32_WndProcHandler as an example which demonstrates what to do with ImGui based on occurrence of a particular win32 UI event

[ocornut]

You should be able to obtain the HWND from TK, get the current WndProc handler, hook yours instead and call the original.

[ocornut]

Or reimplement its content.

[edilanejaderlan-cyber]

Hello I'm i developer i like ImGui bundle and ImGui

[nico-robert]

Ok , thanks all for the advice ,here my values :

What I can see , Once my frame is moved, I have my values that don’t change :
msg: 0xF (15) wParam: 0 lParam: 0

[nico-robert]

I think I found... I had no callback return with DefWindowProc. It seems to work.
Thanks all

[nico-robert]

I have another problem, with the keyboard activation, mouse works weel , but the keyboard is not actived , I have read this : How can I enable keyboard or gamepad controls ?
As always no problem with imgui_impl_opengl3.cpp + imgui_impl_glfw.cpp but with my Tk window , yes.
It’s always related to WndProc handler ? In some examples I can have some enumerations used WM_KEYDOWN, WM_KEYUP WM_SYSKEYDOWN... In my case I never see these values.

[nico-robert]

SetFocus solved my problem