Merge branch 'master' into viewport

# Conflicts:
#	imgui.cpp
#	imgui_internal.h

imgui.cpp

@@ -1006,6 +1006,7 @@ static ImGuiWindow*     NavRestoreLastChildNavWindow(ImGuiWindow* window);
 static void             UpdateMouseInputs();
 static void             UpdateMouseWheel();
 static void             UpdateManualResize(ImGuiWindow* window, const ImVec2& size_auto_fit, int* border_held, int resize_grip_count, ImU32 resize_grip_col[4]);
+static void             EndFrameDrawDimmedBackgrounds();
 
 // Viewports
 const ImGuiID           IMGUI_VIEWPORT_DEFAULT_ID = 0x11111111; // Using an arbitrary constant instead of e.g. ImHash("ViewportDefault", 0); so it's easier to spot in the debugger. The exact value doesn't matter.
@@ -3022,7 +3023,7 @@ void ImGui::StartMouseMovingWindow(ImGuiWindow* window)
 
 // Handle mouse moving window
 // Note: moving window with the navigation keys (Square + d-pad / CTRL+TAB + Arrows) are processed in NavUpdateWindowing()
-void ImGui::UpdateMouseMovingWindow()
+void ImGui::UpdateMouseMovingWindowNewFrame()
 {
     ImGuiContext& g = *GImGui;
     if (g.MovingWindow != NULL)
@@ -3074,6 +3075,56 @@ void ImGui::UpdateMouseMovingWindow()
     }
 }
 
+// Initiate moving window, handle left-click and right-click focus
+void ImGui::UpdateMouseMovingWindowEndFrame()
+{
+    // Initiate moving window
+    ImGuiContext& g = *GImGui;
+    if (g.ActiveId != 0 || g.HoveredId != 0)
+        return;
+
+    // Unless we just made a window/popup appear
+    if (g.NavWindow && g.NavWindow->Appearing)
+        return;
+
+    // Click to focus window and start moving (after we're done with all our widgets)
+    if (g.IO.MouseClicked[0])
+    {
+        if (g.HoveredRootWindow != NULL)
+        {
+            StartMouseMovingWindow(g.HoveredWindow);
+            if (g.IO.ConfigWindowsMoveFromTitleBarOnly && !(g.HoveredRootWindow->Flags & ImGuiWindowFlags_NoTitleBar))
+                if (!g.HoveredRootWindow->TitleBarRect().Contains(g.IO.MouseClickedPos[0]))
+                    g.MovingWindow = NULL;
+        }
+        else if (g.NavWindow != NULL && GetFrontMostPopupModal() == NULL)
+        {
+            FocusWindow(NULL);  // Clicking on void disable focus
+        }
+    }
+
+    // With right mouse button we close popups without changing focus
+    // (The left mouse button path calls FocusWindow which will lead NewFrame->ClosePopupsOverWindow to trigger)
+    if (g.IO.MouseClicked[1])
+    {
+        // Find the top-most window between HoveredWindow and the front most Modal Window.
+        // This is where we can trim the popup stack.
+        ImGuiWindow* modal = GetFrontMostPopupModal();
+        bool hovered_window_above_modal = false;
+        if (modal == NULL)
+            hovered_window_above_modal = true;
+        for (int i = g.Windows.Size - 1; i >= 0 && hovered_window_above_modal == false; i--)
+        {
+            ImGuiWindow* window = g.Windows[i];
+            if (window == modal)
+                break;
+            if (window == g.HoveredWindow)
+                hovered_window_above_modal = true;
+        }
+        ClosePopupsOverWindow(hovered_window_above_modal ? g.HoveredWindow : modal);
+    }
+}
+
 static void TranslateWindow(ImGuiWindow* window, const ImVec2& delta)
 {
     window->Pos += delta;
@@ -3432,7 +3483,8 @@ void ImGui::NewFrame()
     UpdateHoveredWindowAndCaptureFlags();
 
     // Handle user moving window with mouse (at the beginning of the frame to avoid input lag or sheering)
-    UpdateMouseMovingWindow();
+    UpdateMouseMovingWindowNewFrame();
+    UpdateHoveredWindowAndCaptureFlags();
 
     // Background darkening/whitening
     if (GetFrontMostPopupModal() != NULL || (g.NavWindowingTarget != NULL && g.NavWindowingHighlightAlpha > 0.0f))
@@ -3484,6 +3536,7 @@ void ImGui::NewFrame()
     // This fallback is particularly important as it avoid ImGui:: calls from crashing.
     SetNextWindowSize(ImVec2(400,400), ImGuiCond_FirstUseEver);
     Begin("Debug##Default");
+    g.FrameScopePushedImplicitWindow = true;
 
 #ifdef IMGUI_ENABLE_TEST_ENGINE
     ImGuiTestEngineHook_PostNewFrame();
@@ -3720,6 +3773,29 @@ void ImGui::PopClipRect()
     window->ClipRect = window->DrawList->_ClipRectStack.back();
 }
 
+// Draw modal whitening background on _other_ viewports than the one the modal is one
+static void ImGui::EndFrameDrawDimmedBackgrounds()
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* modal_window = GetFrontMostPopupModal();
+    const bool dim_bg_for_modal = (modal_window != NULL);
+    const bool dim_bg_for_window_list = (g.NavWindowingTargetAnim != NULL);
+    if (dim_bg_for_modal || dim_bg_for_window_list)
+        for (int viewport_n = 0; viewport_n < g.Viewports.Size; viewport_n++)
+        {
+            ImGuiViewportP* viewport = g.Viewports[viewport_n];
+            if (modal_window && viewport == modal_window->Viewport)
+                continue;
+            if (g.NavWindowingList && viewport == g.NavWindowingList->Viewport)
+                continue;
+            if (g.NavWindowingTargetAnim && viewport == g.NavWindowingTargetAnim->Viewport)
+                continue;
+            ImDrawList* draw_list = GetOverlayDrawList(viewport);
+            const ImU32 dim_bg_col = GetColorU32(dim_bg_for_modal ? ImGuiCol_ModalWindowDimBg : ImGuiCol_NavWindowingDimBg, g.DimBgRatio);
+            draw_list->AddRectFilled(viewport->Pos, viewport->Pos + viewport->Size, dim_bg_col);
+        }
+}
+
 // This is normally called by Render(). You may want to call it directly if you want to avoid calling Render() but the gain will be very minimal.
 void ImGui::EndFrame()
 {
@@ -3729,9 +3805,6 @@ void ImGui::EndFrame()
         return;
     IM_ASSERT(g.FrameScopeActive && "Forgot to call ImGui::NewFrame()?");
 
-    g.FrameScopeActive = false;
-    g.FrameCountEnded = g.FrameCount;
-
     // Notify OS when our Input Method Editor cursor has moved (e.g. CJK inputs using Microsoft IME)
     if (g.PlatformIO.Platform_SetImeInputPos && ImLengthSqr(g.PlatformImePos - g.PlatformImeLastPos) > 0.0001f && g.PlatformImePosViewport && g.PlatformImePosViewport->PlatformWindowCreated)
     {
@@ -3757,30 +3830,15 @@ void ImGui::EndFrame()
     }
 
     // Hide implicit/fallback "Debug" window if it hasn't been used
+    g.FrameScopePushedImplicitWindow = false;
     if (g.CurrentWindow && !g.CurrentWindow->WriteAccessed)
         g.CurrentWindow->Active = false;
     End();
 
     // Draw modal whitening background on _other_ viewports than the one the modal is one
-    ImGuiWindow* modal_window = GetFrontMostPopupModal();
-    const bool dim_bg_for_modal = (modal_window != NULL);
-    const bool dim_bg_for_window_list = (g.NavWindowingTargetAnim != NULL);
-    if (dim_bg_for_modal || dim_bg_for_window_list)
-        for (int viewport_n = 0; viewport_n < g.Viewports.Size; viewport_n++)
-        {
-            ImGuiViewportP* viewport = g.Viewports[viewport_n];
-            if (modal_window && viewport == modal_window->Viewport)
-                continue;
-            if (g.NavWindowingList && viewport == g.NavWindowingList->Viewport)
-                continue;
-            if (g.NavWindowingTargetAnim && viewport == g.NavWindowingTargetAnim->Viewport)
-                continue;
-            ImDrawList* draw_list = GetOverlayDrawList(viewport);
-            const ImU32 dim_bg_col = GetColorU32(dim_bg_for_modal ? ImGuiCol_ModalWindowDimBg : ImGuiCol_NavWindowingDimBg, g.DimBgRatio);
-            draw_list->AddRectFilled(viewport->Pos, viewport->Pos + viewport->Size, dim_bg_col);
-        }
+    EndFrameDrawDimmedBackgrounds();
 
-    // Show CTRL+TAB list
+    // Show CTRL+TAB list window
     if (g.NavWindowingTarget)
         NavUpdateWindowingList();
 
@@ -3803,49 +3861,12 @@ void ImGui::EndFrame()
         g.DragDropWithinSourceOrTarget = false;
     }
 
-    // Initiate moving window
-    if (g.ActiveId == 0 && g.HoveredId == 0)
-    {
-        if (!g.NavWindow || !g.NavWindow->Appearing) // Unless we just made a window/popup appear
-        {
-            // Click to focus window and start moving (after we're done with all our widgets)
-            if (g.IO.MouseClicked[0])
-            {
-                if (g.HoveredRootWindow != NULL)
-                {
-                    StartMouseMovingWindow(g.HoveredWindow);
-                    if (g.IO.ConfigWindowsMoveFromTitleBarOnly && !(g.HoveredRootWindow->Flags & ImGuiWindowFlags_NoTitleBar))
-                        if (!g.HoveredRootWindow->TitleBarRect().Contains(g.IO.MouseClickedPos[0]))
-                            g.MovingWindow = NULL;
-                }
-                else if (g.NavWindow != NULL && GetFrontMostPopupModal() == NULL)
-                {
-                    FocusWindow(NULL);  // Clicking on void disable focus
-                }
-            }
+    // End frame
+    g.FrameScopeActive = false;
+    g.FrameCountEnded = g.FrameCount;
 
-            // With right mouse button we close popups without changing focus
-            // (The left mouse button path calls FocusWindow which will lead NewFrame->ClosePopupsOverWindow to trigger)
-            if (g.IO.MouseClicked[1])
-            {
-                // Find the top-most window between HoveredWindow and the front most Modal Window.
-                // This is where we can trim the popup stack.
-                ImGuiWindow* modal = GetFrontMostPopupModal();
-                bool hovered_window_above_modal = false;
-                if (modal == NULL)
-                    hovered_window_above_modal = true;
-                for (int i = g.Windows.Size - 1; i >= 0 && hovered_window_above_modal == false; i--)
-                {
-                    ImGuiWindow* window = g.Windows[i];
-                    if (window == modal)
-                        break;
-                    if (window == g.HoveredWindow)
-                        hovered_window_above_modal = true;
-                }
-                ClosePopupsOverWindow(hovered_window_above_modal ? g.HoveredWindow : modal);
-            }
-        }
-    }
+    // Initiate moving window + handle left-click and right-click focus
+    UpdateMouseMovingWindowEndFrame();
 
     // Update user-facing viewport list (g.Viewports -> g.PlatformIO.Viewports after filtering out some)
     UpdateViewportsEndFrame();
@@ -5608,11 +5629,12 @@ void ImGui::End()
 {
     ImGuiContext& g = *GImGui;
 
-    if (g.CurrentWindowStack.Size <= 1 && g.FrameScopeActive)
+    if (g.CurrentWindowStack.Size <= 1 && g.FrameScopePushedImplicitWindow)
     {
         IM_ASSERT(g.CurrentWindowStack.Size > 1 && "Calling End() too many times!");
         return; // FIXME-ERRORHANDLING
     }
+    IM_ASSERT(g.CurrentWindowStack.Size > 0);
 
     ImGuiWindow* window = g.CurrentWindow;
 

imgui_internal.h

@@ -751,7 +751,8 @@ struct ImGuiTabBarSortItem
 struct ImGuiContext
 {
     bool                    Initialized;
-    bool                    FrameScopeActive;                   // Set by NewFrame(), cleared by EndFrame()/Render()
+    bool                    FrameScopeActive;                   // Set by NewFrame(), cleared by EndFrame()
+    bool                    FrameScopePushedImplicitWindow;     // Set by NewFrame(), cleared by EndFrame()
     bool                    FontAtlasOwnedByContext;            // Io.Fonts-> is owned by the ImGuiContext and will be destructed along with it.
     ImGuiIO                 IO;
     ImGuiPlatformIO         PlatformIO;
@@ -926,7 +927,7 @@ struct ImGuiContext
     ImGuiContext(ImFontAtlas* shared_font_atlas)
     {
         Initialized = false;
-        FrameScopeActive = false;
+        FrameScopeActive = FrameScopePushedImplicitWindow = false;
         ConfigFlagsForFrame = ImGuiConfigFlags_None;
         Font = NULL;
         FontSize = FontBaseSize = 0.0f;
@@ -1331,7 +1332,8 @@ namespace ImGui
     // NewFrame
     IMGUI_API void          UpdateHoveredWindowAndCaptureFlags();
     IMGUI_API void          StartMouseMovingWindow(ImGuiWindow* window);
-    IMGUI_API void          UpdateMouseMovingWindow();
+    IMGUI_API void          UpdateMouseMovingWindowNewFrame();
+    IMGUI_API void          UpdateMouseMovingWindowEndFrame();
 
     // Viewports
     IMGUI_API void                  ScaleWindowsInViewport(ImGuiViewportP* viewport, float scale);