The mouse coordinates are shifted when you drag the window to the right or lower-right corner of the screen

[houchr]

Version/Branch of Dear ImGui:

Version: v1.89.x
Branch: docking

Back-end/Renderer/Compiler/OS

Back-ends: imgui_impl_sdl3.cpp + imgui_impl_opengl3.cpp or imgui_impl_sdl2.cpp + imgui_impl_opengl3.cpp or imgui_impl_glfw.cpp + imgui_impl_opengl3.cpp
Compiler: gcc
Operating System: debian/ubuntu 22.04 and kylin desktop v10 sp1

My Issue/Question:

The mouse coordinates are shifted(offset) when you drag the window to the right edge or bottom-right corner of the screen。as the figure shows，the blue arrow is the actual position of the mouse, and the orange arrow is the mouse position it responds to, with a big deviation. When I try to move the window, as long as it moves successfully, the mouse no longer shifts(offset).

The shifted(offset) mouse causes incorrect operation, this problem also occurs when using the imgui demo。

Screenshots/Video

Standalone, minimal, complete and verifiable example:

// Here's some code anyone can copy and paste to reproduce your issue
this problem also occurs when using the imgui demo。
please use imgui demo, open a window, and drag it to right edge or bottom-right coner of screen。

[houchr]

By the way, the window shouldn't be too small.

The windows platform （win10 win11） does not have this problem.

[ocornut]

Same question same answer as #6904
Disable multi-viewports on Linux or Wayland for now.