Merge branch 'master' into docking

# Conflicts:
#	docs/CHANGELOG.txt

docs/CHANGELOG.txt

@@ -115,6 +115,10 @@ Other changes:
   (#6341) [@lukaasm]
 - Nav: Fixed navigation within tables/columns where item boundaries goes beyond columns limits,
   unclipped bounding boxes would interfere with other columns. (#2221) [@zzzyap, @ocornut]
+- Nav: Fixed CTRL+Tab into a root window with only childs with _NavFlattened flags
+  erroneously initializing default nav layer to menu layer.
+- Menus: Fixed an issue when opening a menu hierarchy in a given menu-bar would allow
+  opening another via simple hovering. (#3496, #4797)
 - Debug Tools: Debug Log: Fixed not parsing 0xXXXXXXXX values for geo-locating on mouse
   hover hover when the identifier is at the end of the line. (#5855)
 - Backends: Clear bits sets io.BackendFlags on backend Shutdown(). (#6334, #6335] [@GereonV]
@@ -125,6 +129,7 @@ Other changes:
   by context (Desktop 3.0, 3.1, or 3.2+ with compat bit). (#6333) [@GereonV]
 - Examples: Added native Win32+OpenGL3 example. We don't recommend using this setup but we
   provide it for completeness. (#3218, #5170, #6086, #2772, #2600, #2359, #2022, #1553) [@learn-more]
+- Examples: Vulkan: Use integrated GPU if nothing else is available. (#6359) [@kimidaisuki22]
 
 Docking+Viewports Branch:
 

examples/example_glfw_vulkan/main.cpp

@@ -99,6 +99,10 @@ static VkPhysicalDevice SetupVulkan_SelectPhysicalDevice()
         if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
             return device;
     }
+
+    // Use first GPU (Integrated) is a Discrete one is not available.
+    if (gpu_count > 0)
+        return gpus[0];
     return VK_NULL_HANDLE;
 }
 

examples/example_glut_opengl2/main.cpp

@@ -108,6 +108,7 @@ void MainLoopStep()
     ImGui_ImplOpenGL2_NewFrame();
     ImGui_ImplGLUT_NewFrame();
     ImGui::NewFrame();
+    ImGuiIO& io = ImGui::GetIO();
 
     // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
     if (show_demo_window)
@@ -148,7 +149,6 @@ void MainLoopStep()
 
     // Rendering
     ImGui::Render();
-    ImGuiIO& io = ImGui::GetIO();
     glViewport(0, 0, (GLsizei)io.DisplaySize.x, (GLsizei)io.DisplaySize.y);
     glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
     glClear(GL_COLOR_BUFFER_BIT);

examples/example_sdl2_vulkan/main.cpp

@@ -87,6 +87,10 @@ static VkPhysicalDevice SetupVulkan_SelectPhysicalDevice()
         if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
             return device;
     }
+
+    // Use first GPU (Integrated) is a Discrete one is not available.
+    if (gpu_count > 0)
+        return gpus[0];
     return VK_NULL_HANDLE;
 }
 

imgui.cpp

@@ -5642,6 +5642,10 @@ void ImGui::EndChild()
         {
             // Not navigable into
             ItemAdd(bb, 0);
+
+            // But when flattened we directly reach items, adjust active layer mask accordingly
+            if (window->Flags & ImGuiWindowFlags_NavFlattened)
+                parent_window->DC.NavLayersActiveMaskNext |= window->DC.NavLayersActiveMaskNext;
         }
         if (g.HoveredWindow == window)
             g.LastItemData.StatusFlags |= ImGuiItemStatusFlags_HoveredWindow;
@@ -7456,7 +7460,7 @@ void ImGui::FocusWindow(ImGuiWindow* window, ImGuiFocusRequestFlags flags)
     ImGuiContext& g = *GImGui;
 
     // Modal check?
-    if (flags & ImGuiFocusRequestFlags_UnlessBelowModal)
+    if ((flags & ImGuiFocusRequestFlags_UnlessBelowModal) && (g.NavWindow != window)) // Early out in common case.
         if (ImGuiWindow* blocking_modal = FindBlockingModal(window))
         {
             IMGUI_DEBUG_LOG_FOCUS("[focus] FocusWindow(\"%s\", UnlessBelowModal): prevented by \"%s\".\n", window ? window->Name : "<NULL>", blocking_modal->Name);
@@ -11330,20 +11334,6 @@ static float inline NavScoreItemDistInterval(float cand_min, float cand_max, flo
     return 0.0f;
 }
 
-static void inline NavClampRectToVisibleAreaForMoveDir(ImGuiDir move_dir, ImRect& r, const ImRect& clip_rect)
-{
-    if (move_dir == ImGuiDir_Left || move_dir == ImGuiDir_Right)
-    {
-        r.Min.y = ImClamp(r.Min.y, clip_rect.Min.y, clip_rect.Max.y);
-        r.Max.y = ImClamp(r.Max.y, clip_rect.Min.y, clip_rect.Max.y);
-    }
-    else // FIXME: PageUp/PageDown are leaving move_dir == None
-    {
-        r.Min.x = ImClamp(r.Min.x, clip_rect.Min.x, clip_rect.Max.x);
-        r.Max.x = ImClamp(r.Max.x, clip_rect.Min.x, clip_rect.Max.x);
-    }
-}
-
 // Scoring function for gamepad/keyboard directional navigation. Based on https://gist.github.com/rygorous/6981057
 static bool ImGui::NavScoreItem(ImGuiNavItemData* result)
 {
@@ -11366,10 +11356,6 @@ static bool ImGui::NavScoreItem(ImGuiNavItemData* result)
         cand.ClipWithFull(window->ClipRect); // This allows the scored item to not overlap other candidates in the parent window
     }
 
-    // We perform scoring on items bounding box clipped by the current clipping rectangle on the other axis (clipping on our movement axis would give us equal scores for all clipped items)
-    // For example, this ensures that items in one column are not reached when moving vertically from items in another column.
-    NavClampRectToVisibleAreaForMoveDir(g.NavMoveClipDir, cand, window->ClipRect);
-
     // Compute distance between boxes
     // FIXME-NAV: Introducing biases for vertical navigation, needs to be removed.
     float dbx = NavScoreItemDistInterval(cand.Min.x, cand.Max.x, curr.Min.x, curr.Max.x);
@@ -11697,10 +11683,11 @@ void ImGui::NavMoveRequestForward(ImGuiDir move_dir, ImGuiDir clip_dir, ImGuiNav
 void ImGui::NavMoveRequestTryWrapping(ImGuiWindow* window, ImGuiNavMoveFlags wrap_flags)
 {
     ImGuiContext& g = *GImGui;
-    IM_ASSERT(wrap_flags != 0); // Call with _WrapX, _WrapY, _LoopX, _LoopY
+    IM_ASSERT((wrap_flags & ImGuiNavMoveFlags_WrapMask_ ) != 0 && (wrap_flags & ~ImGuiNavMoveFlags_WrapMask_) == 0); // Call with _WrapX, _WrapY, _LoopX, _LoopY
+
     // In theory we should test for NavMoveRequestButNoResultYet() but there's no point doing it, NavEndFrame() will do the same test
     if (g.NavWindow == window && g.NavMoveScoringItems && g.NavLayer == ImGuiNavLayer_Main)
-        g.NavMoveFlags |= wrap_flags;
+        g.NavMoveFlags = (g.NavMoveFlags & ~ImGuiNavMoveFlags_WrapMask_) | wrap_flags;
 }
 
 // FIXME: This could be replaced by updating a frame number in each window when (window == NavWindow) and (NavLayer == 0).
@@ -12398,8 +12385,7 @@ static void ImGui::NavEndFrame()
     // Perform wrap-around in menus
     // FIXME-NAV: Wrap may need to apply a weight bias on the other axis. e.g. 4x4 grid with 2 last items missing on last item won't handle LoopY/WrapY correctly.
     // FIXME-NAV: Wrap (not Loop) support could be handled by the scoring function and then WrapX would function without an extra frame.
-    const ImGuiNavMoveFlags wanted_flags = ImGuiNavMoveFlags_WrapX | ImGuiNavMoveFlags_LoopX | ImGuiNavMoveFlags_WrapY | ImGuiNavMoveFlags_LoopY;
-    if (g.NavWindow && NavMoveRequestButNoResultYet() && (g.NavMoveFlags & wanted_flags) && (g.NavMoveFlags & ImGuiNavMoveFlags_Forwarded) == 0)
+    if (g.NavWindow && NavMoveRequestButNoResultYet() && (g.NavMoveFlags & ImGuiNavMoveFlags_WrapMask_) && (g.NavMoveFlags & ImGuiNavMoveFlags_Forwarded) == 0)
         NavUpdateCreateWrappingRequest();
 }
 
@@ -12508,7 +12494,7 @@ static void ImGui::NavUpdateWindowing()
     bool apply_toggle_layer = false;
 
     ImGuiWindow* modal_window = GetTopMostPopupModal();
-    bool allow_windowing = (modal_window == NULL); // FIXME: This prevent CTRL+TAB from being usable with windows over a popup
+    bool allow_windowing = (modal_window == NULL); // FIXME: This prevent CTRL+TAB from being usable with windows that are inside the Begin-stack of that modal.
     if (!allow_windowing)
         g.NavWindowingTarget = NULL;
 
@@ -13422,6 +13408,7 @@ void ImGui::LoadIniSettingsFromDisk(const char* ini_filename)
 }
 
 // Zero-tolerance, no error reporting, cheap .ini parsing
+// Set ini_size==0 to let us use strlen(ini_data). Do not call this function with a 0 if your buffer is actually empty!
 void ImGui::LoadIniSettingsFromMemory(const char* ini_data, size_t ini_size)
 {
     ImGuiContext& g = *GImGui;

imgui.h

@@ -23,7 +23,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM > 12345')
 #define IMGUI_VERSION               "1.89.6 WIP"
-#define IMGUI_VERSION_NUM           18953
+#define IMGUI_VERSION_NUM           18954
 #define IMGUI_HAS_TABLE
 #define IMGUI_HAS_VIEWPORT          // Viewport WIP branch
 #define IMGUI_HAS_DOCK              // Docking WIP branch

imgui_internal.h

@@ -1494,6 +1494,7 @@ enum ImGuiNavMoveFlags_
     ImGuiNavMoveFlags_LoopY                 = 1 << 1,
     ImGuiNavMoveFlags_WrapX                 = 1 << 2,   // On failed request, request from opposite side one line down (when NavDir==right) or one line up (when NavDir==left)
     ImGuiNavMoveFlags_WrapY                 = 1 << 3,   // This is not super useful but provided for completeness
+    ImGuiNavMoveFlags_WrapMask_             = ImGuiNavMoveFlags_LoopX | ImGuiNavMoveFlags_LoopY | ImGuiNavMoveFlags_WrapX | ImGuiNavMoveFlags_WrapY,
     ImGuiNavMoveFlags_AllowCurrentNavId     = 1 << 4,   // Allow scoring and considering the current NavId as a move target candidate. This is used when the move source is offset (e.g. pressing PageDown actually needs to send a Up move request, if we are pressing PageDown from the bottom-most item we need to stay in place)
     ImGuiNavMoveFlags_AlsoScoreVisibleSet   = 1 << 5,   // Store alternate result in NavMoveResultLocalVisible that only comprise elements that are already fully visible (used by PageUp/PageDown)
     ImGuiNavMoveFlags_ScrollToEdgeY         = 1 << 6,   // Force scrolling to min/max (used by Home/End) // FIXME-NAV: Aim to remove or reword, probably unnecessary

imgui_widgets.cpp

@@ -7109,7 +7109,7 @@ static bool IsRootOfOpenMenuSet()
 
     // Initially we used 'upper_popup->OpenParentId == window->IDStack.back()' to differentiate multiple menu sets from each others
     // (e.g. inside menu bar vs loose menu items) based on parent ID.
-    // This would however prevent the use of e.g. PuhsID() user code submitting menus.
+    // This would however prevent the use of e.g. PushID() user code submitting menus.
     // Previously this worked between popup and a first child menu because the first child menu always had the _ChildWindow flag,
     // making hovering on parent popup possible while first child menu was focused - but this was generally a bug with other side effects.
     // Instead we don't treat Popup specifically (in order to consistently support menu features in them), maybe the first child menu of a Popup
@@ -7119,7 +7119,9 @@ static bool IsRootOfOpenMenuSet()
     // open on hover, but that should be a lesser problem, because if such menus are close in proximity in window content then it won't feel weird and if they are far apart
     // it likely won't be a problem anyone runs into.
     const ImGuiPopupData* upper_popup = &g.OpenPopupStack[g.BeginPopupStack.Size];
-    return (window->DC.NavLayerCurrent == upper_popup->ParentNavLayer && upper_popup->Window && (upper_popup->Window->Flags & ImGuiWindowFlags_ChildMenu));
+    if (window->DC.NavLayerCurrent != upper_popup->ParentNavLayer)
+        return false;
+    return upper_popup->Window && (upper_popup->Window->Flags & ImGuiWindowFlags_ChildMenu) && ImGui::IsWindowChildOf(upper_popup->Window, window, true);
 }
 
 bool ImGui::BeginMenuEx(const char* label, const char* icon, bool enabled)