/**
* 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);
}