From f35734c9250ec920a05b0328b5d157c3342027c6 Mon Sep 17 00:00:00 2001
From: omar <omarcornut@gmail.com>
Date: Mon, 5 Feb 2018 17:02:30 +0100
Subject: [PATCH] Nav: Debugging code. (#787)

---
 imgui.cpp        | 6 ++++++
 imgui_internal.h | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/imgui.cpp b/imgui.cpp
index 93547e96..58c879d6 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -2147,6 +2147,7 @@ static bool NavScoreItem(ImGuiNavMoveResult* result, ImRect cand)
         return false;
 
     const ImRect& curr = g.NavScoringRectScreen; // Current modified source rect (NB: we've applied Max.x = Min.x in NavUpdate() to inhibit the effect of having varied item width)
+    g.NavScoringCount++;
 
     // We perform scoring on items bounding box clipped by their parent window on the other axis (clipping on our movement axis would give us equal scores for all clipped items)
     if (g.NavMoveDir == ImGuiDir_Left || g.NavMoveDir == ImGuiDir_Right)
@@ -2923,6 +2924,10 @@ static void ImGui::NavUpdate()
     ImGuiContext& g = *GImGui;
     g.IO.WantMoveMouse = 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);
+#endif
+
     // Process navigation init request (select first/default focus)
     if (g.NavInitResultId != 0 && (!g.NavDisableHighlight || g.NavInitResultExplicit))
     {
@@ -3153,6 +3158,7 @@ static void ImGui::NavUpdate()
     g.NavScoringRectScreen.Max.x = g.NavScoringRectScreen.Min.x;
     IM_ASSERT(!g.NavScoringRectScreen.IsInverted()); // Ensure if we have a finite, non-inverted bounding box here will allows us to remove extraneous fabsf() calls in NavScoreItem().
     //g.OverlayDrawList.AddRect(g.NavScoringRectScreen.Min, g.NavScoringRectScreen.Max, IM_COL32(255,200,0,255)); // [DEBUG]
+    g.NavScoringCount = 0;
 #if IMGUI_DEBUG_NAV_RECTS
     if (g.NavWindow) { for (int layer = 0; layer < 2; layer++) g.OverlayDrawList.AddRect(g.NavWindow->Pos + g.NavWindow->NavRectRel[layer].Min, g.NavWindow->Pos + g.NavWindow->NavRectRel[layer].Max, IM_COL32(255,200,0,255)); } // [DEBUG] 
     if (g.NavWindow) { ImU32 col = (g.NavWindow->HiddenFrames <= 0) ? IM_COL32(255,0,255,255) : IM_COL32(255,0,0,255); ImVec2 p = NavCalcPreferredMousePos(); char buf[32]; ImFormatString(buf, 32, "%d", g.NavLayer); g.OverlayDrawList.AddCircleFilled(p, 3.0f, col); g.OverlayDrawList.AddText(NULL, 13.0f, p + ImVec2(8,-4), col, buf); }
diff --git a/imgui_internal.h b/imgui_internal.h
index 4cf1d7c6..027726e7 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -615,6 +615,7 @@ struct ImGuiContext
     ImGuiID                 NavNextActivateId;                  // Set by ActivateItem(), queued until next frame
     ImGuiID                 NavJustMovedToId;                   // Just navigated to this id (result of a successfully MoveRequest)
     ImRect                  NavScoringRectScreen;               // Rectangle used for scoring, in screen space. Based of window->DC.NavRefRectRel[], modified for directional navigation scoring.
+    int                     NavScoringCount;                    // Metrics for debugging
     ImGuiWindow*            NavWindowingTarget;                 // When selecting a window (holding Menu+FocusPrev/Next, or equivalent of CTRL-TAB) this window is temporarily displayed front-most. 
     float                   NavWindowingHighlightTimer;
     float                   NavWindowingHighlightAlpha;
@@ -732,6 +733,7 @@ struct ImGuiContext
         NavId = NavActivateId = NavActivateDownId = NavInputId = 0;
         NavJustTabbedId = NavJustMovedToId = NavNextActivateId = 0;
         NavScoringRectScreen = ImRect();
+        NavScoringCount = 0;
         NavWindowingTarget = NULL;
         NavWindowingHighlightTimer = NavWindowingHighlightAlpha = 0.0f;
         NavWindowingToggleLayer = false;