Debug, Internals: Added DebugDrawCursorPos(), DebugDrawLineExtents() helpers.

imgui.cpp

@@ -14689,6 +14689,38 @@ void ImGui::ShowDebugLogWindow(bool* p_open)
 // [SECTION] OTHER DEBUG TOOLS (ITEM PICKER, STACK TOOL)
 //-----------------------------------------------------------------------------
 
+// Draw a small cross at current CursorPos in current window's DrawList
+void ImGui::DebugDrawCursorPos(ImU32 col)
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
+    ImVec2 pos = window->DC.CursorPos;
+    window->DrawList->AddLine(ImVec2(pos.x, pos.y - 3.0f), ImVec2(pos.x, pos.y + 4.0f), col, 1.0f);
+    window->DrawList->AddLine(ImVec2(pos.x - 3.0f, pos.y), ImVec2(pos.x + 4.0f, pos.y), col, 1.0f);
+}
+
+// Draw a 10px wide rectangle around CurposPos.x using Line Y1/Y2 in current window's DrawList
+void ImGui::DebugDrawLineExtents(ImU32 col)
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
+    float curr_x = window->DC.CursorPos.x;
+    float line_y1 = (window->DC.IsSameLine ? window->DC.CursorPosPrevLine.y : window->DC.CursorPos.y);
+    float line_y2 = line_y1 + (window->DC.IsSameLine ? window->DC.PrevLineSize.y : window->DC.CurrLineSize.y);
+    window->DrawList->AddLine(ImVec2(curr_x - 5.0f, line_y1), ImVec2(curr_x + 5.0f, line_y1), col, 1.0f);
+    window->DrawList->AddLine(ImVec2(curr_x - 0.5f, line_y1), ImVec2(curr_x - 0.5f, line_y2), col, 1.0f);
+    window->DrawList->AddLine(ImVec2(curr_x - 5.0f, line_y2), ImVec2(curr_x + 5.0f, line_y2), col, 1.0f);
+}
+
+// Draw last item rect in ForegroundDrawList (so it is always visible)
+void ImGui::DebugDrawItemRect(ImU32 col)
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
+    GetForegroundDrawList(window)->AddRect(g.LastItemData.Rect.Min, g.LastItemData.Rect.Max, col);
+}
+
+// [DEBUG] Locate item position/rectangle given an ID.
 static const ImU32 DEBUG_LOCATE_ITEM_COLOR = IM_COL32(0, 255, 0, 255);  // Green
 
 void ImGui::DebugLocateItem(ImGuiID target_id)

imgui_internal.h

@@ -3247,10 +3247,12 @@ namespace ImGui
     IMGUI_API void          ErrorCheckEndFrameRecover(ImGuiErrorLogCallback log_callback, void* user_data = NULL);
     IMGUI_API void          ErrorCheckEndWindowRecover(ImGuiErrorLogCallback log_callback, void* user_data = NULL);
     IMGUI_API void          ErrorCheckUsingSetCursorPosToExtendParentBoundaries();
+    IMGUI_API void          DebugDrawCursorPos(ImU32 col = IM_COL32(255, 0, 0, 255));
+    IMGUI_API void          DebugDrawLineExtents(ImU32 col = IM_COL32(255, 0, 0, 255));
+    IMGUI_API void          DebugDrawItemRect(ImU32 col = IM_COL32(255, 0, 0, 255));
     IMGUI_API void          DebugLocateItem(ImGuiID target_id);                     // Call sparingly: only 1 at the same time!
     IMGUI_API void          DebugLocateItemOnHover(ImGuiID target_id);              // Only call on reaction to a mouse Hover: because only 1 at the same time!
     IMGUI_API void          DebugLocateItemResolveWithLastItem();
-    inline void             DebugDrawItemRect(ImU32 col = IM_COL32(255,0,0,255))    { ImGuiContext& g = *GImGui; ImGuiWindow* window = g.CurrentWindow; GetForegroundDrawList(window)->AddRect(g.LastItemData.Rect.Min, g.LastItemData.Rect.Max, col); }
     inline void             DebugStartItemPicker()                                  { ImGuiContext& g = *GImGui; g.DebugItemPickerActive = true; }
     IMGUI_API void          ShowFontAtlas(ImFontAtlas* atlas);
     IMGUI_API void          DebugHookIdInfo(ImGuiID id, ImGuiDataType data_type, const void* data_id, const void* data_id_end);