Updated ImGui.

3rdparty/dear-imgui/imgui.cpp

@@ -379,6 +379,9 @@ CODE
  - 2018/08/01 (1.63) - renamed io.OptCursorBlink to io.ConfigCursorBlink [-> io.ConfigInputTextCursorBlink in 1.65], io.OptMacOSXBehaviors to ConfigMacOSXBehaviors for consistency.
  - 2018/07/22 (1.63) - changed ImGui::GetTime() return value from float to double to avoid accumulating floating point imprecisions over time.
  - 2018/07/08 (1.63) - style: renamed ImGuiCol_ModalWindowDarkening to ImGuiCol_ModalWindowDimBg for consistency with other features. Kept redirection enum (will obsolete).
+ - 2018/06/08 (1.62) - examples: the imgui_impl_xxx files have been split to separate platform (Win32, Glfw, SDL2, etc.) from renderer (DX11, OpenGL, Vulkan,  etc.).
+                       old binding will still work as is, however prefer using the separated bindings as they will be updated to be multi-viewport conformant.
+                       when adopting new bindings follow the main.cpp code of your preferred examples/ folder to know which functions to call.
  - 2018/06/06 (1.62) - renamed GetGlyphRangesChinese() to GetGlyphRangesChineseFull() to distinguish other variants and discourage using the full set.
  - 2018/06/06 (1.62) - TreeNodeEx()/TreeNodeBehavior(): the ImGuiTreeNodeFlags_CollapsingHeader helper now include the ImGuiTreeNodeFlags_NoTreePushOnOpen flag. See Changelog for details. 
  - 2018/05/03 (1.61) - DragInt(): the default compile-time format string has been changed from "%.0f" to "%d", as we are not using integers internally any more.
@@ -2534,6 +2537,7 @@ void ImGui::SetActiveID(ImGuiID id, ImGuiWindow* window)
     }
 }
 
+// FIXME-NAV: The existence of SetNavID/SetNavIDWithRectRel/SetFocusID is incredibly messy and confusing and needs some explanation or refactoring.
 void ImGui::SetFocusID(ImGuiID id, ImGuiWindow* window)
 {
     ImGuiContext& g = *GImGui;
@@ -4914,6 +4918,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
         // Position child window
         if (flags & ImGuiWindowFlags_ChildWindow)
         {
+            IM_ASSERT(parent_window->Active);
             window->BeginOrderWithinParent = (short)parent_window->DC.ChildWindows.Size;
             parent_window->DC.ChildWindows.push_back(window);
             if (!(flags & ImGuiWindowFlags_Popup) && !window_pos_set_by_api && !window_is_child_tooltip)
@@ -5381,7 +5386,7 @@ void ImGui::FocusWindow(ImGuiWindow* window)
         g.NavId = window ? window->NavLastIds[0] : 0; // Restore NavId
         g.NavIdIsAlive = false;
         g.NavLayer = ImGuiNavLayer_Main;
-        //printf("[%05d] FocusWindow(\"%s\")\n", g.FrameCount, window ? window->Name : NULL);
+        //IMGUI_DEBUG_LOG("FocusWindow(\"%s\")\n", g.FrameCount, window ? window->Name : NULL);
     }
 
     // Passing NULL allow to disable keyboard focus
@@ -6558,7 +6563,7 @@ void ImGui::OpenPopupEx(ImGuiID id)
     popup_ref.OpenPopupPos = NavCalcPreferredRefPos();
     popup_ref.OpenMousePos = IsMousePosValid(&g.IO.MousePos) ? g.IO.MousePos : popup_ref.OpenPopupPos;
 
-    //printf("[%05d] OpenPopupEx(0x%08X)\n", g.FrameCount, id);
+    //IMGUI_DEBUG_LOG("OpenPopupEx(0x%08X)\n", g.FrameCount, id);
     if (g.OpenPopupStack.Size < current_stack_size + 1)
     {
         g.OpenPopupStack.push_back(popup_ref);
@@ -7348,7 +7353,7 @@ static void ImGui::NavUpdate()
     ImGuiContext& g = *GImGui;
     g.IO.WantSetMousePos = false;
 #if 0
-    if (g.NavScoringCount > 0) printf("[%05d] NavScoringCount %d for '%s' layer %d (Init:%d, Move:%d)\n", g.FrameCount, g.NavScoringCount, g.NavWindow ? g.NavWindow->Name : "NULL", g.NavLayer, g.NavInitRequest || g.NavInitResultId != 0, g.NavMoveRequest);
+    if (g.NavScoringCount > 0) IMGUI_DEBUG_LOG("NavScoringCount %d for '%s' layer %d (Init:%d, Move:%d)\n", g.FrameCount, g.NavScoringCount, g.NavWindow ? g.NavWindow->Name : "NULL", g.NavLayer, g.NavInitRequest || g.NavInitResultId != 0, g.NavMoveRequest);
 #endif
 
     // Set input source as Gamepad when buttons are pressed before we map Keyboard (some features differs when used with Gamepad vs Keyboard)

3rdparty/dear-imgui/imgui.h

@@ -1283,7 +1283,7 @@ struct ImGuiIO
     bool        KeySuper;                       // Keyboard modifier pressed: Cmd/Super/Windows
     bool        KeysDown[512];                  // Keyboard keys that are pressed (ideally left in the "native" order your engine has access to keyboard keys, so you can use your own defines/enums for keys).
     ImWchar     InputCharacters[16+1];          // List of characters input (translated by user from keypress+keyboard state). Fill using AddInputCharacter() helper.
-    float       NavInputs[ImGuiNavInput_COUNT]; // Gamepad inputs (keyboard keys will be auto-mapped and be written here by ImGui::NewFrame, all values will be cleared back to zero in ImGui::EndFrame)
+    float       NavInputs[ImGuiNavInput_COUNT]; // Gamepad inputs. Cleared back to zero by EndFrame(). Keyboard keys will be auto-mapped and be written here by NewFrame().
 
     // Functions
     IMGUI_API void  AddInputCharacter(ImWchar c);                       // Add new character into InputCharacters[]

3rdparty/dear-imgui/imgui_internal.h

@@ -101,6 +101,7 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit ImGui context pointe
 #else
 #define IM_NEWLINE      "\n"
 #endif
+#define IMGUI_DEBUG_LOG(_FMT,...)       printf("[%05d] " _FMT, GImGui->FrameCount, __VA_ARGS__)
 #define IM_STATIC_ASSERT(_COND)         typedef char static_assertion_##__line__[(_COND)?1:-1]
 #define IM_F32_TO_INT8_UNBOUND(_VAL)    ((int)((_VAL) * 255.0f + ((_VAL)>=0 ? 0.5f : -0.5f)))   // Unsaturated, for display purpose
 #define IM_F32_TO_INT8_SAT(_VAL)        ((int)(ImSaturate(_VAL) * 255.0f + 0.5f))               // Saturated, always output 0..255

3rdparty/dear-imgui/imgui_widgets.cpp

@@ -488,7 +488,7 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
             // Set active id so it can be queried by user via IsItemActive(), equivalent of holding the mouse button.
             g.NavActivateId = id; // This is so SetActiveId assign a Nav source
             SetActiveID(id, window);
-            if (!(flags & ImGuiButtonFlags_NoNavFocus))
+            if ((nav_activated_by_code || nav_activated_by_inputs) && !(flags & ImGuiButtonFlags_NoNavFocus))
                 SetFocusID(id, window);
             g.ActiveIdAllowNavDirFlags = (1 << ImGuiDir_Left) | (1 << ImGuiDir_Right) | (1 << ImGuiDir_Up) | (1 << ImGuiDir_Down);
         }
@@ -5862,7 +5862,7 @@ bool    ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG
     g.CurrentTabBar.push_back(tab_bar);
     if (tab_bar->CurrFrameVisible == g.FrameCount)
     {
-        //printf("[%05d] BeginTabBarEx already called this frame\n", g.FrameCount);
+        //IMGUI_DEBUG_LOG("BeginTabBarEx already called this frame\n", g.FrameCount);
         IM_ASSERT(0);
         return true;
     }