70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
// +build !windows,!darwin
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// 28 october 2014
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package ui
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import (
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"unsafe"
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)
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// #include "gtk_unix.h"
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// extern void spinboxChanged(GtkSpinButton *, gpointer);
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import "C"
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// TODO preferred width may be too wide
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type spinbox struct {
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*controlSingleWidget
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spinbutton *C.GtkSpinButton
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changed *event
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}
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func newSpinbox(min int, max int) Spinbox {
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// gtk_spin_button_new_with_range() initially sets its value to the minimum value
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widget := C.gtk_spin_button_new_with_range(C.gdouble(min), C.gdouble(max), 1)
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s := &spinbox{
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controlSingleWidget: newControlSingleWidget(widget),
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spinbutton: (*C.GtkSpinButton)(unsafe.Pointer(widget)),
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changed: newEvent(),
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}
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C.gtk_spin_button_set_digits(s.spinbutton, 0) // integers
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C.gtk_spin_button_set_numeric(s.spinbutton, C.TRUE) // digits only
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// this isn't specifically documented as the signal to connect to until 3.14
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// it has existed as far back as 3.4, though, if not earlier
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// there's also ::change-value which is for keyboard changing
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g_signal_connect(
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C.gpointer(unsafe.Pointer(s.spinbutton)),
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"value-changed",
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C.GCallback(C.spinboxChanged),
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C.gpointer(unsafe.Pointer(s)))
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return s
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}
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func (s *spinbox) Value() int {
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return int(C.gtk_spin_button_get_value(s.spinbutton))
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}
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func (s *spinbox) SetValue(value int) {
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var min, max C.gdouble
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C.gtk_spin_button_get_range(s.spinbutton, &min, &max)
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if value < int(min) {
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value = int(min)
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}
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if value > int(max) {
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value = int(max)
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}
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C.gtk_spin_button_set_value(s.spinbutton, C.gdouble(value))
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}
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func (s *spinbox) OnChanged(e func()) {
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s.changed.set(e)
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}
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//export spinboxChanged
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func spinboxChanged(swid *C.GtkSpinButton, data C.gpointer) {
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s := (*spinbox)(unsafe.Pointer(data))
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s.changed.fire()
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}
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