Method OptionsPanelClick

src/settings_gui.cpp:1218–1361

	}

	void OptionsPanelClick(Point pt)
	{
		int32_t btn = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_GO_OPTIONSPANEL, WidgetDimensions::scaled.framerect.top);
		if (btn == INT32_MAX || btn < this->warn_lines) return;
		btn -= this->warn_lines;

		uint cur_row = 0;
		BaseSettingEntry *clicked_entry = GetSettingsTree().FindEntry(btn, &cur_row);

		if (clicked_entry == nullptr) return;  // Clicked below the last setting of the page

		const NWidgetBase *wid = this->GetWidget<NWidgetBase>(WID_GO_OPTIONSPANEL);
		int x = (_current_text_dir == TD_RTL ? this->width - 1 - pt.x : pt.x) - WidgetDimensions::scaled.frametext.left - (clicked_entry->level + 1) * WidgetDimensions::scaled.hsep_indent - wid->pos_x; // Shift x coordinate
		if (x < 0) return;  // Clicked left of the entry

		SettingsPage *clicked_page = dynamic_cast<SettingsPage*>(clicked_entry);
		if (clicked_page != nullptr) {
			this->SetDisplayedHelpText(nullptr);
			clicked_page->folded = !clicked_page->folded; // Flip 'folded'-ness of the sub-page

			this->manually_changed_folding = true;

			this->InvalidateData();
			return;
		}

		SettingEntry *pe = dynamic_cast<SettingEntry*>(clicked_entry);
		assert(pe != nullptr);
		const IntSettingDesc *sd = pe->setting;

		/* return if action is only active in network, or only settable by server */
		if (!sd->IsEditable()) {
			this->SetDisplayedHelpText(pe);
			return;
		}

		auto [min_val, max_val] = sd->GetRange();
		int32_t value = sd->Read(ResolveObject(settings_ptr, sd));

		/* clicked on the icon on the left side. Either scroller, bool on/off or dropdown */
		if (x < SETTING_BUTTON_WIDTH && sd->flags.Test(SettingFlag::GuiDropdown)) {
			this->SetDisplayedHelpText(pe);

			if (this->valuedropdown_entry == pe) {
				/* unclick the dropdown */
				this->CloseChildWindows(WC_DROPDOWN_MENU);
				this->closing_dropdown = false;
				this->valuedropdown_entry->SetButtons({});
				this->valuedropdown_entry = nullptr;
			} else {
				if (this->valuedropdown_entry != nullptr) this->valuedropdown_entry->SetButtons({});
				this->closing_dropdown = false;

				int rel_y = (pt.y - wid->pos_y - WidgetDimensions::scaled.framerect.top) % wid->resize_y;

				Rect wi_rect;
				wi_rect.left = pt.x - (_current_text_dir == TD_RTL ? SETTING_BUTTON_WIDTH - 1 - x : x);
				wi_rect.right = wi_rect.left + SETTING_BUTTON_WIDTH - 1;