Function NewNotifyIcon

notifyicon.go:90–133

NewNotifyIcon creates and returns a new NotifyIcon. The NotifyIcon is initially not visible.

(form Form)

//
// The NotifyIcon is initially not visible.
func NewNotifyIcon(form Form) (*NotifyIcon, error) {
	fb := form.AsFormBase()
	// Add our notify icon to the status area and make sure it is hidden.
	nid := win.NOTIFYICONDATA{
		HWnd:             fb.hWnd,
		UFlags:           win.NIF_MESSAGE | win.NIF_STATE,
		DwState:          win.NIS_HIDDEN,
		DwStateMask:      win.NIS_HIDDEN,
		UCallbackMessage: notifyIconMessageId,
	}
	nid.CbSize = uint32(unsafe.Sizeof(nid) - unsafe.Sizeof(win.HICON(0)))

	if !win.Shell_NotifyIcon(win.NIM_ADD, &nid) {
		return nil, newError("Shell_NotifyIcon")
	}

	// We want XP-compatible message behavior.
	nid.UVersion = win.NOTIFYICON_VERSION

	if !win.Shell_NotifyIcon(win.NIM_SETVERSION, &nid) {
		return nil, newError("Shell_NotifyIcon")
	}

	// Create and initialize the NotifyIcon already.
	menu, err := NewMenu()
	if err != nil {
		return nil, err
	}
	menu.window = form

	ni := &NotifyIcon{
		id:          nid.UID,
		hWnd:        fb.hWnd,
		contextMenu: menu,
	}

	menu.getDPI = ni.DPI

	// Set our *NotifyIcon as user data for the message window.
	win.SetWindowLongPtr(fb.hWnd, win.GWLP_USERDATA, uintptr(unsafe.Pointer(ni)))

	notifyIcons[ni] = true
	return ni, nil
}

func (ni *NotifyIcon) DPI() int {
	fakeWb := WindowBase{hWnd: win.FindWindow(syscall.StringToUTF16Ptr("Shell_TrayWnd"), syscall.StringToUTF16Ptr(""))}