bsnes/hiro/windows/widget/vertical-scroll-bar.cpp

43 lines
1014 B
C++

#if defined(Hiro_VerticalScrollBar)
namespace hiro {
auto pVerticalScrollBar::construct() -> void {
hwnd = CreateWindow(
L"SCROLLBAR", L"", WS_CHILD | SBS_VERT,
0, 0, 0, 0, _parentHandle(), nullptr, GetModuleHandle(0), 0
);
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)&reference);
pWidget::_setState();
setLength(state().length);
setPosition(state().position);
}
auto pVerticalScrollBar::destruct() -> void {
DestroyWindow(hwnd);
}
auto pVerticalScrollBar::minimumSize() const -> Size {
return {18, 0};
}
auto pVerticalScrollBar::setLength(unsigned length) -> void {
length += (length == 0);
SetScrollRange(hwnd, SB_CTL, 0, length - 1, TRUE);
}
auto pVerticalScrollBar::setPosition(unsigned position) -> void {
SetScrollPos(hwnd, SB_CTL, position, TRUE);
}
auto pVerticalScrollBar::onChange(WPARAM wparam) -> void {
unsigned position = ScrollEvent(hwnd, wparam);
if(position == state().position) return;
state().position = position;
self().doChange();
}
}
#endif