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#if defined(Hiro_ComboButton)
namespace hiro {
auto pComboButton::construct() -> void {
hwnd = CreateWindow(
L"COMBOBOX", L"",
WS_CHILD | WS_TABSTOP | CBS_DROPDOWNLIST | CBS_HASSTRINGS,
0, 0, 0, 0,
_parentHandle(), nullptr, GetModuleHandle(0), 0
);
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)&reference);
pWidget::_setState();
for(auto& item : state().items) append(item);
}
auto pComboButton::destruct() -> void {
DestroyWindow(hwnd);
}
auto pComboButton::append(sComboButtonItem item) -> void {
lock();
SendMessage(hwnd, CB_ADDSTRING, 0, (LPARAM)(wchar_t*)utf16_t(item->state.text));
if(item->state.selected) SendMessage(hwnd, CB_SETCURSEL, item->offset(), 0);
if(SendMessage(hwnd, CB_GETCURSEL, 0, 0) == CB_ERR) item->setSelected();
unlock();
}
auto pComboButton::minimumSize() const -> Size {
signed width = 0;
for(auto& item : state().items) {
width = max(width, pFont::size(hfont, item->state.text).width());
}
return {width + 24, pFont::size(hfont, " ").height() + 10};
}
auto pComboButton::remove(sComboButtonItem item) -> void {
lock();
SendMessage(hwnd, CB_DELETESTRING, item->offset(), 0);
if(item->state.selected) SendMessage(hwnd, CB_SETCURSEL, 0, 0);
unlock();
}
auto pComboButton::reset() -> void {
SendMessage(hwnd, CB_RESETCONTENT, 0, 0);
}
auto pComboButton::setGeometry(Geometry geometry) -> void {
//height = minimum drop-down list height; use CB_SETITEMHEIGHT to control actual widget height
pWidget::setGeometry({geometry.x(), geometry.y(), geometry.width(), 1});
RECT rc;
GetWindowRect(hwnd, &rc);
unsigned adjustedHeight = geometry.height() - ((rc.bottom - rc.top) - SendMessage(hwnd, CB_GETITEMHEIGHT, (WPARAM)-1, 0));
SendMessage(hwnd, CB_SETITEMHEIGHT, (WPARAM)-1, adjustedHeight);
}
auto pComboButton::onChange() -> void {
signed offset = SendMessage(hwnd, CB_GETCURSEL, 0, 0);
if(offset == CB_ERR) return;
for(auto& item : state().items) item->state.selected = false;
if(auto item = self().item(offset)) item->setSelected();
self().doChange();
}
}
#endif
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