Nav: Fixed gamepad/keyboard moving of window affecting contents size incorrectly, sometimes leading to scrollbars appearing during the movement. + minor fix with the mostly dead Ctrl+wheel scaling.

docs/CHANGELOG.txt

@@ -53,6 +53,8 @@ Other Changes:
   options. (#2587, broken in 1.69 by #2384).
 - CollapsingHeader: Better clipping when a close button is enabled and it overlaps the label. (#600)
 - Scrollbar: Very minor bounding box adjustment to cope with various border size.
+- Nav: Fixed gamepad/keyboard moving of window affecting contents size incorrectly, sometimes leading
+  to scrollbars appearing during the movement.
 - Style: Added style.WindowMenuButtonPosition (left/right, defaults to ImGuiDir_Left) to move the
   collapsing/docking button to the other side of the title bar.
 - Style: Made window close button cross slightly smaller.

imgui.cpp

@@ -3330,7 +3330,7 @@ void ImGui::UpdateMouseWheel()
 
     // Zoom / Scale window
     // FIXME-OBSOLETE: This is an old feature, it still works but pretty much nobody is using it and may be best redesigned.
-    if (g.IO.MouseWheel != 0.0f && g.IO.KeyCtrl && g.IO.FontAllowUserScaling)
+    if (g.IO.MouseWheel != 0.0f && g.IO.KeyCtrl && g.IO.FontAllowUserScaling && !window->Collapsed)
     {
         const float new_font_scale = ImClamp(window->FontWindowScale + g.IO.MouseWheel * 0.10f, 0.50f, 2.50f);
         const float scale = new_font_scale / window->FontWindowScale;
@@ -3338,7 +3338,7 @@ void ImGui::UpdateMouseWheel()
         if (!(window->Flags & ImGuiWindowFlags_ChildWindow))
         {
             const ImVec2 offset = window->Size * (1.0f - scale) * (g.IO.MousePos - window->Pos) / window->Size;
-            window->Pos = ImFloor(window->Pos + offset);
+            SetWindowPos(window, window->Pos + offset, 0);
             window->Size = ImFloor(window->Size * scale);
             window->SizeFull = ImFloor(window->SizeFull * scale);
         }
@@ -8398,7 +8398,7 @@ static void ImGui::NavUpdateWindowing()
         {
             const float NAV_MOVE_SPEED = 800.0f;
             const float move_speed = ImFloor(NAV_MOVE_SPEED * g.IO.DeltaTime * ImMin(g.IO.DisplayFramebufferScale.x, g.IO.DisplayFramebufferScale.y)); // FIXME: Doesn't code variable framerate very well
-            g.NavWindowingTarget->RootWindow->Pos += move_delta * move_speed;
+            SetWindowPos(g.NavWindowingTarget->RootWindow, g.NavWindowingTarget->RootWindow->Pos + move_delta * move_speed, ImGuiCond_Always);
             g.NavDisableMouseHover = true;
             MarkIniSettingsDirty(g.NavWindowingTarget);
         }

imgui_internal.h

@@ -1450,9 +1450,9 @@ namespace ImGui
     IMGUI_API float         GetWindowScrollMaxX(ImGuiWindow* window);
     IMGUI_API float         GetWindowScrollMaxY(ImGuiWindow* window);
     IMGUI_API ImRect        GetWindowAllowedExtentRect(ImGuiWindow* window);
-    IMGUI_API void          SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond);
-    IMGUI_API void          SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond);
-    IMGUI_API void          SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond);
+    IMGUI_API void          SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond = 0);
+    IMGUI_API void          SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond = 0);
+    IMGUI_API void          SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond = 0);
 
     IMGUI_API void          SetCurrentFont(ImFont* font);
     inline ImFont*          GetDefaultFont() { ImGuiContext& g = *GImGui; return g.IO.FontDefault ? g.IO.FontDefault : g.IO.Fonts->Fonts[0]; }