entry.go

// 12 december 2015

// TODO typing in entry in OS X crashes libui
// I've had similar issues with checkboxes on libui
// something's wrong with NSMapTable

package ui

import (
	"unsafe"
)

// #include "pkgui.h"
import "C"

// Entry is a Control that represents a space that the user can
// type a single line of text into.
type Entry struct {
	ControlBase
	e          *C.uiEntry
	onChanged  func(*Entry)
	onKeyEvent func(*Entry, *AreaKeyEvent) (handled bool)
}

func finishNewEntry(ee *C.uiEntry) *Entry {
	e := new(Entry)

	e.e = ee

	C.pkguiEntryOnChanged(e.e)
	C.pkguiEntryOnKeyEvent(e.e)

	e.ControlBase = NewControlBase(e, uintptr(unsafe.Pointer(e.e)))
	return e
}

// NewEntry creates a new Entry.
func NewEntry() *Entry {
	return finishNewEntry(C.uiNewEntry())
}

// NewPasswordEntry creates a new Entry whose contents are
// visibly obfuscated, suitable for passwords.
func NewPasswordEntry() *Entry {
	return finishNewEntry(C.uiNewPasswordEntry())
}

// NewSearchEntry creates a new Entry suitable for searching with.
// Changed events may, depending on the system, be delayed
// with a search Entry, to produce a smoother user experience.
func NewSearchEntry() *Entry {
	return finishNewEntry(C.uiNewSearchEntry())
}

// Text returns the Entry's text.
func (e *Entry) Text() string {
	ctext := C.uiEntryText(e.e)
	text := C.GoString(ctext)
	C.uiFreeText(ctext)
	return text
}

// SetText sets the Entry's text to text.
func (e *Entry) SetText(text string) {
	ctext := C.CString(text)
	C.uiEntrySetText(e.e, ctext)
	freestr(ctext)
}

func (e *Entry) SelectAllText() {
	C.uiEntrySelectAllText(e.e)
}

func (e *Entry) SelectText(start int, end int) {
	C.uiEntrySelectText(e.e, C.int(start), C.int(end))
}

// OnChanged registers f to be run when the user makes a change to
// the Entry. Only one function can be registered at a time.
func (e *Entry) OnChanged(f func(*Entry)) {
	e.onChanged = f
}

//export pkguiDoEntryOnChanged
func pkguiDoEntryOnChanged(ee *C.uiEntry, data unsafe.Pointer) {
	e := ControlFromLibui(uintptr(unsafe.Pointer(ee))).(*Entry)
	if e.onChanged != nil {
		e.onChanged(e)
	}
}

// OnKeyEvent registers f to be run when the user makes a change to
// the Entry. Only one function can be registered at a time.
func (e *Entry) OnKeyEvent(f func(*Entry, *AreaKeyEvent) (handled bool)) {
	e.onKeyEvent = f
}

//export pkguiDoEntryOnKeyEvent
func pkguiDoEntryOnKeyEvent(ee *C.uiEntry, uke *C.uiAreaKeyEvent) C.int {
	ke := &AreaKeyEvent{
		Key:       rune(uke.Key),
		ExtKey:    ExtKey(uke.ExtKey),
		Modifier:  Modifiers(uke.Modifier),
		Modifiers: Modifiers(uke.Modifiers),
		Up:        tobool(uke.Up),
	}
	e := ControlFromLibui(uintptr(unsafe.Pointer(ee))).(*Entry)
	if e.onKeyEvent != nil {
		return frombool(e.onKeyEvent(e, ke))
	}
	return frombool(false)
}

// ReadOnly returns whether the Entry can be changed.
func (e *Entry) ReadOnly() bool {
	return tobool(C.uiEntryReadOnly(e.e))
}

// SetReadOnly sets whether the Entry can be changed.
func (e *Entry) SetReadOnly(ro bool) {
	C.uiEntrySetReadOnly(e.e, frombool(ro))
}

func (e *Entry) UnsetFocus() {
	C.uiEntryUnsetFocus(e.e)
}

func (e *Entry) SetFont(name string, size int, weight TextWeight) {
	cname := C.CString(name)
	C.uiEntrySetFont(e.e, cname, C.int(size), C.int(weight), C.int(0))
	freestr(cname)
}

func (e *Entry) SetPasswordChar(ch string) {
	cch := C.CString(ch)
	C.uiEntryPasswordChar(e.e, *cch)
	freestr(cch)
}

func (e *Entry) CenterText(center bool) {
	i := 0
	if center {
		i = 1
	}
	C.uiEntryCenterText(e.e, C.int(i))
}

func (e *Entry) SetMaxLength(max int) {
	C.uiEntrySetMaxLength(e.e, C.int(max))
}

func (e *Entry) SetPrefSize(w, h int) {
	C.uiEntrySetPrefSize(e.e, C.int(w), C.int(h))
}