LET'S GET THIS FINAL REWRITE EVER STARTED

1 files changed, 69 insertions, 0 deletions

diff --git a/prev/spinbox_unix.go b/prev/spinbox_unix.go
new file mode 100644
index 0000000..ca84b28
--- /dev/null
+++ b/prev/spinbox_unix.go
@@ -0,0 +1,69 @@
+// +build !windows,!darwin
+
+// 28 october 2014
+
+package ui
+
+import (
+	"unsafe"
+)
+
+// #include "gtk_unix.h"
+// extern void spinboxChanged(GtkSpinButton *, gpointer);
+import "C"
+
+// TODO preferred width may be too wide
+
+type spinbox struct {
+	*controlSingleWidget
+	spinbutton	*C.GtkSpinButton
+	changed		*event
+}
+
+func newSpinbox(min int, max int) Spinbox {
+	// gtk_spin_button_new_with_range() initially sets its value to the minimum value
+	widget := C.gtk_spin_button_new_with_range(C.gdouble(min), C.gdouble(max), 1)
+	s := &spinbox{
+		controlSingleWidget:	newControlSingleWidget(widget),
+		spinbutton:			(*C.GtkSpinButton)(unsafe.Pointer(widget)),
+		changed:				newEvent(),
+	}
+	C.gtk_spin_button_set_digits(s.spinbutton, 0)				// integers
+	C.gtk_spin_button_set_numeric(s.spinbutton, C.TRUE)		// digits only
+	// this isn't specifically documented as the signal to connect to until 3.14
+	// it has existed as far back as 3.4, though, if not earlier
+	// there's also ::change-value which is for keyboard changing
+	g_signal_connect(
+		C.gpointer(unsafe.Pointer(s.spinbutton)),
+		"value-changed",
+		C.GCallback(C.spinboxChanged),
+		C.gpointer(unsafe.Pointer(s)))
+	return s
+}
+
+func (s *spinbox) Value() int {
+	return int(C.gtk_spin_button_get_value(s.spinbutton))
+}
+
+func (s *spinbox) SetValue(value int) {
+	var min, max C.gdouble
+
+	C.gtk_spin_button_get_range(s.spinbutton, &min, &max)
+	if value < int(min) {
+		value = int(min)
+	}
+	if value > int(max) {
+		value = int(max)
+	}
+	C.gtk_spin_button_set_value(s.spinbutton, C.gdouble(value))
+}
+
+func (s *spinbox) OnChanged(e func()) {
+	s.changed.set(e)
+}
+
+//export spinboxChanged
+func spinboxChanged(swid *C.GtkSpinButton, data C.gpointer) {
+	s := (*spinbox)(unsafe.Pointer(data))
+	s.changed.fire()
+}