Viewports, Backend: SDL: Fix missing ImGuiBackendFlags_HasSetMousePos flag in docking branch (ok in master), GLFW: Fix application of WantSetMousePos. (#1542, #787)

Shows how little this feature is used with nav (was designed for small devices and frankly may be dropped) - but the backend support itself we will make use of for other features.

backends/imgui_impl_sdl.cpp

@@ -168,6 +168,7 @@ static bool ImGui_ImplSDL2_Init(SDL_Window* window, void* sdl_gl_context)
     // Setup backend capabilities flags
     ImGuiIO& io = ImGui::GetIO();
     io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;       // We can honor GetMouseCursor() values (optional)
+    io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;        // We can honor io.WantSetMousePos requests (optional, rarely used)
 #if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
     io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports;  // We can create multi-viewports on the Platform side (optional)
 #endif

backends/imgui_impl_win32.cpp

@@ -218,7 +218,7 @@ static void ImGui_ImplWin32_UpdateMousePos()
     if (io.WantSetMousePos)
     {
         POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y };
-        if ((io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) != 0 || ::ClientToScreen(g_hWnd, &pos))
+        if ((io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) == 0)
             ::ClientToScreen(g_hWnd, &pos);
         ::SetCursorPos(pos.x, pos.y);
     }

imgui.cpp

@@ -9530,6 +9530,7 @@ static inline void ImGui::NavUpdateAnyRequestFlag()
 // This needs to be called before we submit any widget (aka in or before Begin)
 void ImGui::NavInitWindow(ImGuiWindow* window, bool force_reinit)
 {
+    // FIXME: ChildWindow test here is wrong for docking
     ImGuiContext& g = *GImGui;
     IM_ASSERT(window == g.NavWindow);
     bool init_for_nav = false;
@@ -11206,7 +11207,6 @@ static void WindowSettingsHandler_WriteAll(ImGuiContext* ctx, ImGuiSettingsHandl
         buf->appendf("Collapsed=%d\n", settings->Collapsed);
         if (settings->DockId != 0)
         {
-            // Write DockId as 4 digits if possible. Automatic DockId are small numbers, but full explicit DockSpace() are full ImGuiID range.
             if (settings->DockOrder == -1)
                 buf->appendf("DockId=0x%08X\n", settings->DockId);
             else

imgui_internal.h

@@ -188,9 +188,9 @@ namespace ImStb
 
 // Debug Logging for selected systems. Remove the '((void)0) //' to enable.
 //#define IMGUI_DEBUG_LOG_POPUP         IMGUI_DEBUG_LOG // Enable log
+//#define IMGUI_DEBUG_LOG_NAV           IMGUI_DEBUG_LOG // Enable log
 //#define IMGUI_DEBUG_LOG_VIEWPORT      IMGUI_DEBUG_LOG // Enable log
 //#define IMGUI_DEBUG_LOG_DOCKING       IMGUI_DEBUG_LOG // Enable log
-//#define IMGUI_DEBUG_LOG_NAV           IMGUI_DEBUG_LOG // Enable log
 #define IMGUI_DEBUG_LOG_POPUP(...)      ((void)0)       // Disable log
 #define IMGUI_DEBUG_LOG_NAV(...)        ((void)0)       // Disable log
 #define IMGUI_DEBUG_LOG_VIEWPORT(...)   ((void)0)       // Disable log