func (app *DemoApp) RunMessageLoop() {
msg := w32.MSG{}
for w32.GetMessage(&msg, 0, 0, 0) > 0 {
w32.TranslateMessage(&msg)
w32.DispatchMessage(&msg)
}
}
// Creates a low-level keyboard hook using the SetWindowsHookEx function:
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms644990(v=vs.85).aspx
//
// Each intercepted key, which was included in the 'forwardedKeys' configuration
// variable (see NewKeyboardCapture), will be pushed to the 'KeyPressed' channel field.
// Returns an error in case the initialization of the hook failed.
// Calls to this function will block until KeyboardCapture.Stop() was called or the
// WM_QUIT message was sent to the current process.
func (t *KeyboardCapture) SyncReceive() error {
isValidKey := func(key w32.DWORD) bool {
for _, e := range t.forwardedKeys {
if e == int(key) {
return true
}
}
return false
}
t.KeyPressed = make(chan int)
t.keyboardHook = w32.SetWindowsHookEx(w32.WH_KEYBOARD_LL,
(w32.HOOKPROC)(func(code int, wparam w32.WPARAM, lparam w32.LPARAM) w32.LRESULT {
if code >= 0 && wparam == w32.WM_KEYDOWN {
kbdstruct := (*w32.KBDLLHOOKSTRUCT)(unsafe.Pointer(lparam))
if isValidKey(kbdstruct.VkCode) {
select {
case t.KeyPressed <- int(kbdstruct.VkCode):
default:
}
}
}
return w32.CallNextHookEx(t.keyboardHook, code, wparam, lparam)
}), 0, 0)
if t.keyboardHook == 0 {
return syscall.GetLastError()
}
var msg w32.MSG
for w32.GetMessage(&msg, 0, 0, 0) != 0 {
}
w32.UnhookWindowsHookEx(t.keyboardHook)
t.keyboardHook = 0
return nil
}
func (this *Window) HandleWndMessages() {
var m w32.MSG
for w32.GetMessage(&m, this.hwnd, 0, 0) != 0 {
w32.TranslateMessage(&m)
w32.DispatchMessage(&m)
}
}
func RunMainLoop() int {
var m w32.MSG
for w32.GetMessage(&m, 0, 0, 0) != 0 {
if !PreTranslateMessage(&m) {
w32.TranslateMessage(&m)
w32.DispatchMessage(&m)
}
}
w32.GdiplusShutdown()
return int(m.WParam)
}
func run() {
msg := &w32.MSG{}
for {
switch val := w32.GetMessage(msg, 0, 0, 0); val {
case -1:
log.Printf("w32: error: %v\n", getLastError())
os.Exit(1)
case 0:
return
default:
w32.TranslateMessage(msg)
w32.DispatchMessage(msg)
}
}
}
// Adds the notification icon and starts handling the mouse
// interaction with the icon.
// Calls to this function will block until the Stop() function
// will be called from another goroutine/thread.
// Returns an error, if adding the notify icons fails.
func (t *_NotifyIcon) Start() (err error) {
log.Println("Creating notification icon")
tooltipUtf16, _ := syscall.UTF16FromString(t.tooltip)
t.nid.CbSize = w32.DWORD(unsafe.Sizeof(&t.nid))
t.nid.HWnd = t.hwnd
t.nid.UFlags = _NIF_MESSAGE | _NIF_ICON | _NIF_TIP
t.nid.UID = niUID
t.nid.UCallbackMessage = niCallbackMessage
copy(t.nid.SzTip[:], tooltipUtf16)
err = shellNotifyIcon(_NIM_ADD, &t.nid)
if err != nil {
return
}
var msg w32.MSG
for w32.GetMessage(&msg, t.hwnd, uint32(0), uint32(0)) != 0 {
w32.TranslateMessage(&msg)
w32.DispatchMessage(&msg)
}
return nil
}