Method SetImage

button.go:81–113

(image Image)

}

func (b *Button) SetImage(image Image) error {
	var typ, handle uintptr
	switch img := image.(type) {
	case nil:

	case *Bitmap:
		typ = win.IMAGE_BITMAP
		handle = uintptr(img.hBmp)

	case *Icon:
		typ = win.IMAGE_ICON
		handle = uintptr(img.handleForDPI(b.DPI()))

	default:
		bmp, err := iconCache.Bitmap(image, b.DPI())
		if err != nil {
			return err
		}

		typ = win.IMAGE_BITMAP
		handle = uintptr(bmp.hBmp)
	}

	b.SendMessage(win.BM_SETIMAGE, typ, handle)

	b.image = image

	b.RequestLayout()

	b.imageChangedPublisher.Publish()

	return nil
}

func (b *Button) ImageChanged() *Event {
	return b.imageChangedPublisher.Event()