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

50 lines
1.2 KiB
C++

#if defined(Hiro_VerticalScrollBar)
namespace hiro {
static auto VerticalScrollBar_change(GtkRange* gtkRange, pVerticalScrollBar* p) -> void {
auto position = (unsigned)gtk_range_get_value(gtkRange);
if(p->state().position == position) return;
p->state().position = position;
if(!p->locked()) p->self().doChange();
}
auto pVerticalScrollBar::construct() -> void {
#if HIRO_GTK==2
gtkWidget = gtk_vscrollbar_new(nullptr);
#elif HIRO_GTK==3
gtkWidget = gtk_scrollbar_new(GTK_ORIENTATION_VERTICAL, nullptr);
#endif
setLength(state().length);
setPosition(state().position);
g_signal_connect(G_OBJECT(gtkWidget), "value-changed", G_CALLBACK(VerticalScrollBar_change), (gpointer)this);
pWidget::construct();
}
auto pVerticalScrollBar::destruct() -> void {
gtk_widget_destroy(gtkWidget);
}
auto pVerticalScrollBar::minimumSize() const -> Size {
return {20, 0};
}
auto pVerticalScrollBar::setLength(unsigned length) -> void {
lock();
length += length == 0;
gtk_range_set_range(GTK_RANGE(gtkWidget), 0, max(1u, length - 1));
gtk_range_set_increments(GTK_RANGE(gtkWidget), 1, length >> 3);
unlock();
}
auto pVerticalScrollBar::setPosition(unsigned position) -> void {
gtk_range_set_value(GTK_RANGE(gtkWidget), position);
}
}
#endif