libui/zOLD_unix/slider.c

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