VOID CALLBACK GUITimerProc( HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime )
{
gui_window *wnd;
gui_timer_event timer;
uMsg = uMsg; dwTime = dwTime;
wnd = GUIGetWindow( hwnd );
if( wnd == NULL ) {
GUITimer();
} else {
timer.id = idEvent;
GUIEVENTWND( wnd, GUI_TIMER_EVENT, &timer );
}
}
/**
* 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.
*/
DropdownWindow(Window *parent, const DropDownList *list, int selected, int button, bool instant_close, const Point &position, const Dimension &size, Colours wi_colour, bool scroll)
: Window(&_dropdown_desc)
{
assert(list->Length() > 0);
this->position = position;
this->CreateNestedTree();
this->vscroll = this->GetScrollbar(WID_DM_SCROLL);
uint items_width = size.width - (scroll ? NWidgetScrollbar::GetVerticalDimension().width : 0);
NWidgetCore *nwi = this->GetWidget<NWidgetCore>(WID_DM_ITEMS);
nwi->SetMinimalSize(items_width, size.height + 4);
nwi->colour = wi_colour;
nwi = this->GetWidget<NWidgetCore>(WID_DM_SCROLL);
nwi->colour = wi_colour;
this->GetWidget<NWidgetStacked>(WID_DM_SHOW_SCROLL)->SetDisplayedPlane(scroll ? 0 : SZSP_NONE);
this->FinishInitNested(0);
CLRBITS(this->flags, WF_WHITE_BORDER);
/* Total length of list */
int list_height = 0;
for (const DropDownListItem * const *it = list->Begin(); it != list->End(); ++it) {
const DropDownListItem *item = *it;
list_height += item->Height(items_width);
}
/* Capacity is the average number of items visible */
this->vscroll->SetCapacity(size.height * (uint16)list->Length() / list_height);
this->vscroll->SetCount((uint16)list->Length());
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;
this->scrolling_timer = GUITimer(MILLISECONDS_PER_TICK);
}
