Debug Tools: Tweaked layout of ID Stack Tool and always display full path. (#4631)

docs/CHANGELOG.txt

@@ -110,6 +110,7 @@ Other changes:
   One case where it would manifest was calling Combo() with an out of range index. (#8450)
 - Debug Tools: Added io.ConfigDebugHighlightIdConflictsShowItemPicker (defaults to true)
   to allow disabled Item Picker suggestion in user facing builds. (#7961, #7669)
+- Debug Tools: Tweaked layout of ID Stack Tool and always display full path. (#4631)
 - Misc: Added ImGuiMouseCursor_Wait and ImGuiMouseCursor_Progress mouse cursors
   (busy/wait/hourglass shape, with or without an arrow cursor).
 - Demo: Reorganized "Widgets" section to be alphabetically ordered and split in more functions.

imgui.cpp

@@ -16924,42 +16924,44 @@ void ImGui::ShowIDStackToolWindow(bool* p_open)
 
     // Display hovered/active status
     ImGuiIDStackTool* tool = &g.DebugIDStackTool;
-    const ImGuiID hovered_id = g.HoveredIdPreviousFrame;
-    const ImGuiID active_id = g.ActiveId;
-#ifdef IMGUI_ENABLE_TEST_ENGINE
-    Text("HoveredId: 0x%08X (\"%s\"), ActiveId:  0x%08X (\"%s\")", hovered_id, hovered_id ? ImGuiTestEngine_FindItemDebugLabel(&g, hovered_id) : "", active_id, active_id ? ImGuiTestEngine_FindItemDebugLabel(&g, active_id) : "");
-#else
-    Text("HoveredId: 0x%08X, ActiveId:  0x%08X", hovered_id, active_id);
-#endif
+
+    // Build and display path
+    tool->ResultPathBuf.resize(0);
+    for (int stack_n = 0; stack_n < tool->Results.Size; stack_n++)
+    {
+        char level_desc[256];
+        StackToolFormatLevelInfo(tool, stack_n, false, level_desc, IM_ARRAYSIZE(level_desc));
+        tool->ResultPathBuf.append(stack_n == 0 ? "//" : "/");
+        for (int n = 0; level_desc[n]; n++)
+        {
+            if (level_desc[n] == '/')
+                tool->ResultPathBuf.append("\\");
+            tool->ResultPathBuf.append(level_desc + n, level_desc + n + 1);
+        }
+    }
+    Text("0x%08X", tool->QueryId);
     SameLine();
     MetricsHelpMarker("Hover an item with the mouse to display elements of the ID Stack leading to the item's final ID.\nEach level of the stack correspond to a PushID() call.\nAll levels of the stack are hashed together to make the final ID of a widget (ID displayed at the bottom level of the stack).\nRead FAQ entry about the ID stack for details.");
 
     // CTRL+C to copy path
     const float time_since_copy = (float)g.Time - tool->CopyToClipboardLastTime;
-    Checkbox("Ctrl+C: copy path to clipboard", &tool->CopyToClipboardOnCtrlC);
+    SameLine();
+    PushStyleVarY(ImGuiStyleVar_FramePadding, 0.0f); Checkbox("Ctrl+C: copy path", &tool->CopyToClipboardOnCtrlC); PopStyleVar();
     SameLine();
     TextColored((time_since_copy >= 0.0f && time_since_copy < 0.75f && ImFmod(time_since_copy, 0.25f) < 0.25f * 0.5f) ? ImVec4(1.f, 1.f, 0.3f, 1.f) : ImVec4(), "*COPIED*");
     if (tool->CopyToClipboardOnCtrlC && Shortcut(ImGuiMod_Ctrl | ImGuiKey_C, ImGuiInputFlags_RouteGlobal | ImGuiInputFlags_RouteOverFocused))
     {
         tool->CopyToClipboardLastTime = (float)g.Time;
-        char* p = g.TempBuffer.Data;
-        char* p_end = p + g.TempBuffer.Size;
-        for (int stack_n = 0; stack_n < tool->Results.Size && p + 3 < p_end; stack_n++)
-        {
-            *p++ = '/';
-            char level_desc[256];
-            StackToolFormatLevelInfo(tool, stack_n, false, level_desc, IM_ARRAYSIZE(level_desc));
-            for (int n = 0; level_desc[n] && p + 2 < p_end; n++)
-            {
-                if (level_desc[n] == '/')
-                    *p++ = '\\';
-                *p++ = level_desc[n];
-            }
-        }
-        *p = '\0';
-        SetClipboardText(g.TempBuffer.Data);
+        SetClipboardText(tool->ResultPathBuf.c_str());
     }
 
+    Text("- Path \"%s\"", tool->ResultPathBuf.c_str());
+#ifdef IMGUI_ENABLE_TEST_ENGINE
+    Text("- Label \"%s\"", tool->QueryId ? ImGuiTestEngine_FindItemDebugLabel(&g, tool->QueryId) : "");
+#endif
+
+    Separator();
+
     // Display decorated stack
     tool->LastActiveFrame = g.FrameCount;
     if (tool->Results.Size > 0 && BeginTable("##table", 3, ImGuiTableFlags_Borders))

imgui.h

@@ -2600,10 +2600,11 @@ struct ImGuiTextBuffer
     ImGuiTextBuffer()   { }
     inline char         operator[](int i) const { IM_ASSERT(Buf.Data != NULL); return Buf.Data[i]; }
     const char*         begin() const           { return Buf.Data ? &Buf.front() : EmptyString; }
-    const char*         end() const             { return Buf.Data ? &Buf.back() : EmptyString; }   // Buf is zero-terminated, so end() will point on the zero-terminator
+    const char*         end() const             { return Buf.Data ? &Buf.back() : EmptyString; } // Buf is zero-terminated, so end() will point on the zero-terminator
     int                 size() const            { return Buf.Size ? Buf.Size - 1 : 0; }
     bool                empty() const           { return Buf.Size <= 1; }
     void                clear()                 { Buf.clear(); }
+    void                resize(int size)        { IM_ASSERT(size == 0); if (Buf.Size > 0) Buf.Data[0] = 0; Buf.resize(0); } // Similar to resize(0) on ImVector: empty string but don't free buffer. Only resize(0) supported for now.
     void                reserve(int capacity)   { Buf.reserve(capacity); }
     const char*         c_str() const           { return Buf.Data ? Buf.Data : EmptyString; }
     IMGUI_API void      append(const char* str, const char* str_end = NULL);

imgui_internal.h

@@ -2030,6 +2030,7 @@ struct ImGuiIDStackTool
     ImVector<ImGuiStackLevelInfo> Results;
     bool                    CopyToClipboardOnCtrlC;
     float                   CopyToClipboardLastTime;
+    ImGuiTextBuffer         ResultPathBuf;
 
     ImGuiIDStackTool()      { memset(this, 0, sizeof(*this)); CopyToClipboardLastTime = -FLT_MAX; }
 };