Combo() adding frame padding inside the combo box.

imgui.cpp

@@ -1277,7 +1277,7 @@ public:
     float       CalcFontSize() const                    { return GImGui->FontBaseSize * FontWindowScale; }
     float       TitleBarHeight() const                  { return (Flags & ImGuiWindowFlags_NoTitleBar) ? 0 : CalcFontSize() + GImGui->Style.FramePadding.y * 2.0f; }
     ImRect      TitleBarRect() const                    { return ImRect(Pos, Pos + ImVec2(SizeFull.x, TitleBarHeight())); }
-    ImVec2      WindowPadding() const                   { return ((Flags & ImGuiWindowFlags_ChildWindow) && !(Flags & ImGuiWindowFlags_ShowBorders)) ? ImVec2(0,0) : GImGui->Style.WindowPadding; }
+    ImVec2      WindowPadding() const                   { return ((Flags & ImGuiWindowFlags_ChildWindow) && !(Flags & ImGuiWindowFlags_ShowBorders) && !(Flags & ImGuiWindowFlags_ComboBox)) ? ImVec2(0,0) : GImGui->Style.WindowPadding; }
     ImU32       Color(ImGuiCol idx, float a=1.f) const  { ImVec4 c = GImGui->Style.Colors[idx]; c.w *= GImGui->Style.Alpha * a; return ImGui::ColorConvertFloat4ToU32(c); }
     ImU32       Color(const ImVec4& col) const          { ImVec4 c = col; c.w *= GImGui->Style.Alpha; return ImGui::ColorConvertFloat4ToU32(c); }
 };
@@ -6708,11 +6708,12 @@ bool ImGui::Combo(const char* label, int* current_item, bool (*items_getter)(voi
 
         const ImVec2 backup_pos = ImGui::GetCursorPos();
         const float popup_off_x = 0.0f;//style.ItemInnerSpacing.x;
-        const float popup_height = (label_size.y + style.ItemSpacing.y) * ImMin(items_count, height_in_items) + style.WindowPadding.y;
+        const float popup_height = (label_size.y + style.ItemSpacing.y) * ImMin(items_count, height_in_items) + (style.FramePadding.y * 3);
         const ImRect popup_rect(ImVec2(frame_bb.Min.x+popup_off_x, frame_bb.Max.y), ImVec2(frame_bb.Max.x+popup_off_x, frame_bb.Max.y + popup_height));
         ImGui::SetCursorPos(popup_rect.Min - window->Pos);
 
         const ImGuiWindowFlags flags = ImGuiWindowFlags_ComboBox | ((window->Flags & ImGuiWindowFlags_ShowBorders) ? ImGuiWindowFlags_ShowBorders : 0);
+        ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, style.FramePadding);
         ImGui::BeginChild("#ComboBox", popup_rect.GetSize(), false, flags);
         ImGui::Spacing();
 
@@ -6740,6 +6741,7 @@ bool ImGui::Combo(const char* label, int* current_item, bool (*items_getter)(voi
             ImGui::PopID();
         }
         ImGui::EndChild();
+        ImGui::PopStyleVar();
         ImGui::SetCursorPos(backup_pos);
         
         if (!combo_item_active && g.ActiveId != 0)