Mutli Screen with Linux, Panel get stuck

[kingofknights]

Version/Branch of Dear ImGui:

Version Latest commit, Branch: docking

Back-ends:

imgui_impl_opengl3.cpp + imgui_impl_glfw.cpp

Compiler, OS:

Linux Ubutnu 22.04 + GCC 11.4.0

Full config/build information:

Dear ImGui 1.92.0 WIP (19191)
--------------------------------
sizeof(size_t): 8, sizeof(ImDrawIdx): 2, sizeof(ImDrawVert): 20
define: __cplusplus=202002
define: __linux__
define: __GNUC__=11
define: IMGUI_HAS_VIEWPORT
define: IMGUI_HAS_DOCK
--------------------------------
io.BackendPlatformName: imgui_impl_glfw
io.BackendRendererName: imgui_impl_opengl3
io.ConfigFlags: 0x00000481
 NavEnableKeyboard
 DockingEnable
 ViewportsEnable
io.ConfigViewportsNoDecoration
io.ConfigNavCaptureKeyboard
io.ConfigInputTextCursorBlink
io.ConfigWindowsResizeFromEdges
io.ConfigMemoryCompactTimer = 60.0
io.BackendFlags: 0x00001C0E
 HasMouseCursors
 HasSetMousePos
 PlatformHasViewports
 HasMouseHoveredViewport
 RendererHasVtxOffset
 RendererHasViewports
--------------------------------
io.Fonts: 1 fonts, Flags: 0x00000000, TexSize: 1024,1024
io.DisplaySize: 3840.00,2123.00
io.DisplayFramebufferScale: 1.00,1.00
--------------------------------
style.WindowPadding: 8.00,8.00
style.WindowBorderSize: 0.00
style.FramePadding: 4.00,3.00
style.FrameRounding: 2.00
style.FrameBorderSize: 1.00
style.ItemSpacing: 8.00,4.00
style.ItemInnerSpacing: 4.00,4.00

Details:

My Issue/Question:

This is my ImGui Project
Arthur

Previously i was working with window, using opengl3 and sdl3 single display screen, every things works fine.
Now i have shifted to opengl3 and glfw3 in linux environment with dual monitor.
Even though application is running on single screen and not panel is shifted to other one.
when i pop out any panel, it seem to become stuck a location.

Screenshots/Video:

You can download working Binary from here

https://github.com/kingofknights/Arthur/releases/download/Demo/Query.zip
Demo

Minimal, Complete and Verifiable Example code:

https://github.com/kingofknights/Arthur.git

[kingofknights]

// imo.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;  // Enable Multi-Viewport / Platform Windows
// imo.ConfigViewportsNoAutoMerge   = true;
// imo.ConfigViewportsNoTaskBarIcon = true;

if this is issue, please add the OS preprocessor,
if Yes, Them i am happy to OS Preprocessor in your examples codes

[ocornut]

Please provide

• a video
• information on your X11/Wayland setup and Window Manager
• a screenshot of the list of Monitors as available in Metrics/Debugger->Viewports.

// imo.ConfigViewportsNoAutoMerge = true;
// imo.ConfigViewportsNoTaskBarIcon = true;
If this is issue, please add the OS preprocessor,

I don't understand what you are talking about, please be more explicit.

[kingofknights]

This issue is related to linux environment. when i have set

// imo.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;  // Enable Multi-Viewport / Platform Windows
// imo.ConfigViewportsNoAutoMerge   = true;
// imo.ConfigViewportsNoTaskBarIcon = true;

with docking branch.

any dock-able panel when moved outside of main application window.
the application start lagging or get struck event. but same runs okay in windows environment.

Currently to solved the problem, I have replaced my backed from
OpenGL and GLUT to OpenGL and SDL3

I have made lot of changes in project around this. so its rather difficult to reproduce this issue.

[ocornut]

This issue is related to linux environment. when i have set

I don't know what that means. You are quoting COMMENTED CODE. Does that means you disabled or enabled those values? It's ambiguous.

Currently to solved the problem, I have replaced my backed from
OpenGL and GLUT to OpenGL and SDL3

Your issue template state that you are using GLFW, and you now you say you were using GLUT and now are using SDL3. Those are three wholly different things.

I cannot deal with this until you make an effort to make non-ambiguous statements and provide the information outline by Contributing Guidelines.