overlay: card override input should be disabled when overridden with cmd line (#599)

src/spice2x/overlay/windows/config.cpp

@@ -3804,6 +3804,7 @@ namespace overlay::windows {
                     this->keypads_card_override_valid[player] ? ImVec4(1.f, 1.f, 1.f, 1.f) :
                     ImVec4(1.f, 0.f, 0.f, 1.f));
                 ImGui::SetNextItemWidth(TEXT_INPUT_WIDTH);
+                ImGui::BeginDisabled(option.disabled);
                 ImGui::InputTextWithHint("##OverrideCard", "E004010000000000",
                         buffer, sizeof(buffer) - 1,
                         ImGuiInputTextFlags_CharsUppercase |
@@ -3824,6 +3825,9 @@ namespace overlay::windows {
                     this->keypads_card_override_valid[player] = false;
                 }
 
+                ImGui::EndDisabled();
+
+                if (!option.disabled) {
                     // generate button
                     ImGui::SameLine();
                     if (ImGui::Button("Generate")) {
@@ -3831,6 +3835,7 @@ namespace overlay::windows {
                         card_changed = true;
                     }
 
+                    // clear button
                     if (option.is_active()) {
                         ImGui::SameLine();
                         if (ImGui::Button("Clear")) {
@@ -3838,6 +3843,13 @@ namespace overlay::windows {
                             card_changed = true;
                         }
                     }
+                } else {
+                    if (ImGui::IsItemHovered(ImGui::TOOLTIP_FLAGS)) {
+                        ImGui::HelpTooltip(
+                            "This option cannot be edited because it was overriden by command-line options.\n"
+                            "Run spicecfg.exe to configure the options and then run spice(64).exe directly.");
+                    }
+                }
 
                 // bad card number warning
                 if (!this->keypads_card_override_valid[player] && buffer_len > 0) {