Merge branch 'master' into docking

# Conflicts:
#	backends/imgui_impl_win32.cpp
#	docs/CHANGELOG.txt

backends/imgui_impl_win32.cpp

@@ -36,6 +36,7 @@ typedef DWORD (WINAPI *PFN_XInputGetState)(DWORD, XINPUT_STATE*);
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2023-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2023-02-15: Inputs: Use WM_NCMOUSEMOVE / WM_NCMOUSELEAVE to track mouse position over non-client area (e.g. OS decorations) when app is not focused. (#6045, #6162)
 //  2023-02-02: Inputs: Flipping WM_MOUSEHWHEEL (horizontal mouse-wheel) value to match other backends and offer consistent horizontal scrolling direction. (#4019, #6096, #1463)
 //  2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
 //  2022-09-28: Inputs: Convert WM_CHAR values with MultiByteToWideChar() when window class was registered as MBCS (not Unicode).
@@ -91,7 +92,7 @@ struct ImGui_ImplWin32_Data
 {
     HWND                        hWnd;
     HWND                        MouseHwnd;
-    bool                        MouseTracked;
+    int                         MouseTrackedArea;   // 0: not tracked, 1: client are, 2: non-client area
     int                         MouseButtonsDown;
     INT64                       Time;
     INT64                       TicksPerSecond;
@@ -290,7 +291,8 @@ static void ImGui_ImplWin32_UpdateMouseData()
         }
 
         // (Optional) Fallback to provide mouse position when focused (WM_MOUSEMOVE already provides this when hovered or captured)
-        if (!io.WantSetMousePos && !bd->MouseTracked && has_mouse_screen_pos)
+        // This also fills a short gap when clicking non-client area: WM_NCMOUSELEAVE -> modal OS move -> gap -> WM_NCMOUSEMOVE
+        if (!io.WantSetMousePos && bd->MouseTrackedArea == 0 && has_mouse_screen_pos)
         {
             // Single viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
             // (This is the position you can get with ::GetCursorPos() + ::ScreenToClient() or WM_MOUSEMOVE.)
@@ -587,27 +589,42 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARA
     switch (msg)
     {
     case WM_MOUSEMOVE:
+    case WM_NCMOUSEMOVE:
     {
         // We need to call TrackMouseEvent in order to receive WM_MOUSELEAVE events
+        const int area = (msg == WM_MOUSEMOVE) ? 1 : 2;
         bd->MouseHwnd = hwnd;
-        if (!bd->MouseTracked)
+        if (bd->MouseTrackedArea != area)
         {
-            TRACKMOUSEEVENT tme = { sizeof(tme), TME_LEAVE, hwnd, 0 };
+            TRACKMOUSEEVENT tme_cancel = { sizeof(tme_cancel), TME_CANCEL, hwnd, 0 };
-            ::TrackMouseEvent(&tme);
+            TRACKMOUSEEVENT tme_track = { sizeof(tme_track), (DWORD)((area == 2) ? (TME_LEAVE | TME_NONCLIENT) : TME_LEAVE), hwnd, 0 };
-            bd->MouseTracked = true;
+            if (bd->MouseTrackedArea != 0)
+                ::TrackMouseEvent(&tme_cancel);
+            ::TrackMouseEvent(&tme_track);
+            bd->MouseTrackedArea = area;
         }
         POINT mouse_pos = { (LONG)GET_X_LPARAM(lParam), (LONG)GET_Y_LPARAM(lParam) };
-        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
+        bool want_absolute_pos = (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) != 0;
+        if (msg == WM_MOUSEMOVE && want_absolute_pos)    // WM_MOUSEMOVE are client-relative coordinates.
             ::ClientToScreen(hwnd, &mouse_pos);
+        if (msg == WM_NCMOUSEMOVE && !want_absolute_pos) // WM_NCMOUSEMOVE are absolute coordinates.
+            ::ScreenToClient(hwnd, &mouse_pos);
         io.AddMousePosEvent((float)mouse_pos.x, (float)mouse_pos.y);
         break;
     }
     case WM_MOUSELEAVE:
+    case WM_NCMOUSELEAVE:
+    {
+        const int area = (msg == WM_MOUSELEAVE) ? 1 : 2;
+        if (bd->MouseTrackedArea == area)
+        {
             if (bd->MouseHwnd == hwnd)
                 bd->MouseHwnd = nullptr;
-        bd->MouseTracked = false;
+            bd->MouseTrackedArea = 0;
             io.AddMousePosEvent(-FLT_MAX, -FLT_MAX);
+        }
         break;
+    }
     case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK:
     case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK:
     case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK:

docs/CHANGELOG.txt

@@ -98,6 +98,18 @@ Other changes:
   Note that Linux/Mac still have inconsistent support for multi-viewports. If you want to help see https://github.com/ocornut/imgui/issues/2117.
 
 
+-----------------------------------------------------------------------
+ VERSION 1.89.4 WIP (In Progress)
+-----------------------------------------------------------------------
+
+Breaking Changes:
+
+Other changes:
+
+- Backends: Win32: Use WM_NCMOUSEMOVE / WM_NCMOUSELEAVE to track mouse positions over
+  non-client area (e.g. OS decorations) when app is not focused. (#6045, #6162)
+
+
 -----------------------------------------------------------------------
  VERSION 1.89.3 (Released 2023-02-14)
 -----------------------------------------------------------------------
@@ -112,7 +124,7 @@ Breaking Changes:
   - imgui_impl_sdl.h   -> imgui_impl_sdl2.h
   - example_sdl_xxxx/  -> example_sdl2_xxxx/ (folders and projects)
 
-All changes:
+Other changes:
 
 - SeparatorText(): Added SeparatorText() widget. (#1643) [@phed, @ocornut]
   - Added to style: float  SeparatorTextBorderSize.

imgui.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (main code and documentation)
 
 // Help:

imgui.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (headers)
 
 // Help:
@@ -22,8 +22,8 @@
 
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM > 12345')
-#define IMGUI_VERSION               "1.89.3"
+#define IMGUI_VERSION               "1.89.4 WIP"
-#define IMGUI_VERSION_NUM           18930
+#define IMGUI_VERSION_NUM           18931
 #define IMGUI_HAS_TABLE
 #define IMGUI_HAS_VIEWPORT          // Viewport WIP branch
 #define IMGUI_HAS_DOCK              // Docking WIP branch

imgui_demo.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (demo code)
 
 // Help:

imgui_draw.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (drawing and font code)
 
 /*

imgui_internal.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (internal structures/api)
 
 // You may use this file to debug, understand or extend Dear ImGui features but we don't provide any guarantee of forward compatibility.

imgui_tables.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (tables and columns code)
 
 /*

imgui_widgets.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.89.3
+// dear imgui, v1.89.4 WIP
 // (widgets code)
 
 /*

misc/freetype/imgui_freetype.cpp

@@ -52,7 +52,7 @@
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wpragmas"                  // warning: unknown option after '#pragma GCC diagnostic' kind
 #pragma GCC diagnostic ignored "-Wunused-function"          // warning: 'xxxx' defined but not used
-#pragma GCC diagnostic ignored "-Wsubobject-linkage"        // warning: 'xxxx' has a field ‘xxxx’ whose type uses the anonymous namespace
+#pragma GCC diagnostic ignored "-Wsubobject-linkage"        // warning: 'xxxx' has a field 'xxxx' whose type uses the anonymous namespace
 #endif
 
 //-------------------------------------------------------------------------