/** * Create a dropdown menu. * @param parent Parent window. * @param list Dropdown item list. * @param selected Index of the selected item in the list. * @param button Widget of the parent window doing the dropdown. * @param instant_close Close the window when the mouse button is raised. * @param position Topleft position of the dropdown menu window. * @param size Size of the dropdown menu window. * @param wi_colour Colour of the parent widget. * @param scroll Dropdown menu has a scrollbar. * @param widget Widgets of the dropdown menu window. */ DropdownWindow(Window *parent, DropDownList *list, int selected, int button, bool instant_close, const Point &position, const Dimension &size, Colours wi_colour, bool scroll) : Window() { this->position = position; this->CreateNestedTree(&_dropdown_desc); this->vscroll = this->GetScrollbar(DDM_SCROLL); uint items_width = size.width - (scroll ? WD_VSCROLLBAR_WIDTH : 0); NWidgetCore *nwi = this->GetWidget<NWidgetCore>(DDM_ITEMS); nwi->SetMinimalSize(items_width, size.height + 4); nwi->colour = wi_colour; nwi = this->GetWidget<NWidgetCore>(DDM_SCROLL); nwi->colour = wi_colour; this->GetWidget<NWidgetStacked>(DDM_SHOW_SCROLL)->SetDisplayedPlane(scroll ? 0 : SZSP_NONE); this->FinishInitNested(&_dropdown_desc, 0); this->flags4 &= ~WF_WHITE_BORDER_MASK; /* Total length of list */ int list_height = 0; for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) { DropDownListItem *item = *it; list_height += item->Height(items_width); } /* Capacity is the average number of items visible */ this->vscroll->SetCapacity(size.height * (uint16)list->size() / list_height); this->vscroll->SetCount((uint16)list->size()); this->parent_wnd_class = parent->window_class; this->parent_wnd_num = parent->window_number; this->parent_button = button; this->list = list; this->selected_index = selected; this->click_delay = 0; this->drag_mode = true; this->instant_close = instant_close; }
/** * Show a dropdown menu window near a widget of the parent window. * The result code of the items is their index in the #strings list. * @param w Parent window that wants the dropdown menu. * @param strings Menu list, end with #INVALID_STRING_ID * @param selected Index of initial selected item. * @param button Button widget number of the parent window #w that wants the dropdown menu. * @param disabled_mask Bitmask for diabled items (items with their bit set are not copied to the dropdown list). * @param hidden_mask Bitmask for hidden items (items with their bit set are displayed, but not selectable in the dropdown list). * @param width Width of the dropdown menu. If \c 0, use the width of parent widget #button. */ void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int button, uint32 disabled_mask, uint32 hidden_mask, uint width) { DropDownList *list = new DropDownList(); for (uint i = 0; strings[i] != INVALID_STRING_ID; i++) { if (!HasBit(hidden_mask, i)) { list->push_back(new DropDownListStringItem(strings[i], i, HasBit(disabled_mask, i))); } } /* No entries in the list? */ if (list->size() == 0) { DeleteDropDownList(list); return; } ShowDropDownList(w, list, selected, button, width); }