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// 12 december 2015
package ui
import (
"unsafe"
)
// #include "ui.h"
// extern void doSpinboxOnChanged(uiSpinbox *, void *);
// static inline void realuiSpinboxOnChanged(uiSpinbox *b)
// {
// uiSpinboxOnChanged(b, doSpinboxOnChanged, NULL);
// }
import "C"
// no need to lock this; only the GUI thread can access it
var spinboxes = make(map[*C.uiSpinbox]*Spinbox)
// Spinbox is a Control that represents a space where the user can
// enter integers. The space also comes with buttons to add or
// subtract 1 from the integer.
type Spinbox struct {
c *C.uiControl
s *C.uiSpinbox
onChanged func(*Spinbox)
}
// NewSpinbox creates a new Spinbox. If min >= max, they are swapped.
func NewSpinbox(min int, max int) *Spinbox {
s := new(Spinbox)
s.s = C.uiNewSpinbox(C.intmax_t(min), C.intmax_t(max))
s.c = (*C.uiControl)(unsafe.Pointer(s.s))
C.realuiSpinboxOnChanged(s.s)
spinboxes[s.s] = s
return s
}
// Destroy destroys the Spinbox.
func (s *Spinbox) Destroy() {
delete(spinboxes, s.s)
C.uiControlDestroy(s.c)
}
// LibuiControl returns the libui uiControl pointer that backs
// the Window. This is only used by package ui itself and should
// not be called by programs.
func (s *Spinbox) LibuiControl() uintptr {
return uintptr(unsafe.Pointer(s.c))
}
// Handle returns the OS-level handle associated with this Spinbox.
// On Windows this is an HWND of a standard Windows API EDIT
// class (as provided by Common Controls version 6). Due to
// various limitations which affect the lifetime of the associated
// Common Controls version 6 UPDOWN_CLASS window that
// provides the buttons, there is no way to access it.
// On GTK+ this is a pointer to a GtkSpinButton.
// On OS X this is a pointer to a NSView that contains a NSTextField
// and a NSStepper as subviews.
func (s *Spinbox) Handle() uintptr {
return uintptr(C.uiControlHandle(s.c))
}
// Show shows the Spinbox.
func (s *Spinbox) Show() {
C.uiControlShow(s.c)
}
// Hide hides the Spinbox.
func (s *Spinbox) Hide() {
C.uiControlHide(s.c)
}
// Enable enables the Spinbox.
func (s *Spinbox) Enable() {
C.uiControlEnable(s.c)
}
// Disable disables the Spinbox.
func (s *Spinbox) Disable() {
C.uiControlDisable(s.c)
}
// Value returns the Spinbox's current value.
func (s *Spinbox) Value() int {
return int(C.uiSpinboxValue(s.s))
}
// SetText sets the Spinbox's current value to value.
func (s *Spinbox) SetValue(value int) {
C.uiSpinboxSetValue(s.s, C.intmax_t(value))
}
// OnChanged registers f to be run when the user changes the value
// of the Spinbox. Only one function can be registered at a time.
func (s *Spinbox) OnChanged(f func(*Spinbox)) {
s.onChanged = f
}
//export doSpinboxOnChanged
func doSpinboxOnChanged(ss *C.uiSpinbox, data unsafe.Pointer) {
s := spinboxes[ss]
if s.onChanged != nil {
s.onChanged(s)
}
}
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