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