// 11 june 2015 #include "uipriv_unix.h" struct uiSlider { uiUnixControl c; GtkWidget *widget; GtkRange *range; GtkScale *scale; void (*onChanged)(uiSlider *, void *); void *onChangedData; gulong onChangedSignal; }; uiUnixControlAllDefaults(uiSlider) static void onChanged(GtkRange *range, gpointer data) { uiSlider *s = uiSlider(data); (*(s->onChanged))(s, s->onChangedData); } static void defaultOnChanged(uiSlider *s, void *data) { // do nothing } intmax_t uiSliderValue(uiSlider *s) { return (intmax_t) gtk_range_get_value(s->range); } void uiSliderSetValue(uiSlider *s, intmax_t value) { // we need to inhibit sending of ::value-changed because this WILL send a ::value-changed otherwise g_signal_handler_block(s->range, s->onChangedSignal); gtk_range_set_value(s->range, value); g_signal_handler_unblock(s->range, s->onChangedSignal); } void uiSliderOnChanged(uiSlider *s, void (*f)(uiSlider *, void *), void *data) { s->onChanged = f; s->onChangedData = data; } uiSlider *uiNewSlider(intmax_t min, intmax_t max) { uiSlider *s; intmax_t temp; if (min >= max) { temp = min; min = max; max = temp; } uiUnixNewControl(uiSlider, s); s->widget = gtk_scale_new_with_range(GTK_ORIENTATION_HORIZONTAL, min, max, 1); s->range = GTK_RANGE(s->widget); s->scale = GTK_SCALE(s->widget); // ensure integers, just to be safe gtk_scale_set_digits(s->scale, 0); s->onChangedSignal = g_signal_connect(s->scale, "value-changed", G_CALLBACK(onChanged), s); uiSliderOnChanged(s, defaultOnChanged, NULL); return s; }