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// 12 december 2015
package ui
import (
"unsafe"
)
// #include <stdlib.h>
// #include "ui.h"
// #include "util.h"
// extern void doFontButtonOnChanged(uiFontButton *, void *);
// // see golang/go#19835
// typedef void (*fontButtonCallback)(uiFontButton *, void *);
// static inline uiFontDescriptor *pkguiNewFontDescriptor(void)
// {
// return (uiFontDescriptor *) pkguiAlloc(sizeof (uiFontDescriptor));
// }
// static inline void pkguiFreeFontDescriptor(uiFontDescriptor *fd)
// {
// free(fd);
// }
import "C"
// FontButton is a Control that represents a button that the user can
// click to select a font.
type FontButton struct {
ControlBase
b *C.uiFontButton
onChanged func(*FontButton)
}
// NewFontButton creates a new FontButton.
func NewFontButton() *FontButton {
b := new(FontButton)
b.b = C.uiNewFontButton()
C.uiFontButtonOnChanged(b.b, C.fontButtonCallback(C.doFontButtonOnChanged), nil)
b.ControlBase = NewControlBase(b, uintptr(unsafe.Pointer(b.b)))
return b
}
// Font returns the font currently selected in the FontButton.
func (b *FontButton) Font() *FontDescriptor {
cfd := C.pkguiNewFontDescriptor()
defer C.pkguiFreeFontDescriptor(cfd)
C.uiFontButtonFont(b.b, cfd)
defer C.uiFreeFontButtonFont(cfd)
fd := &FontDescriptor{}
fd.fromLibui(cfd)
return fd
}
// OnChanged registers f to be run when the user changes the
// currently selected font in the FontButton. Only one function can
// be registered at a time.
func (b *FontButton) OnChanged(f func(*FontButton)) {
b.onChanged = f
}
//export doFontButtonOnChanged
func doFontButtonOnChanged(bb *C.uiFontButton, data unsafe.Pointer) {
b := ControlFromLibui(uintptr(unsafe.Pointer(bb))).(*FontButton)
if b.onChanged != nil {
b.onChanged(b)
}
}
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