// Creates a hidden window, required for capturing the mouse interaction with the
// notify icon. Windows will call the WndProc of this window, whenever something happens
// on the notify icon (e.g. mouse click).
func (t *_NotifyIcon) createCallbackWindow() (err error) {
className := "KeyFwdWindowClass"
err = registerWindowClass(className, t.iconCallback)
if err != nil {
return
}
classNamePtr, _ := syscall.UTF16PtrFromString(className)
t.hwnd = w32.CreateWindowEx(
uint(w32.WS_EX_LEFT|w32.WS_EX_LTRREADING|w32.WS_EX_WINDOWEDGE),
classNamePtr,
nil,
uint(w32.WS_OVERLAPPED|w32.WS_MINIMIZEBOX|w32.WS_SYSMENU|w32.WS_CLIPSIBLINGS|w32.WS_CAPTION),
w32.CW_USEDEFAULT,
w32.CW_USEDEFAULT,
10,
10,
w32.HWND_DESKTOP,
w32.HMENU(0),
w32.GetModuleHandle(""),
unsafe.Pointer(uintptr(0)),
)
if t.hwnd == 0 {
return syscall.GetLastError()
}
return nil
}
// NewWindow creates a new window and assigns it to a widget.
func newWindow(w sparta.Widget) {
var win *window
rect := w.Property(sparta.Geometry).(image.Rectangle)
if p := w.Property(sparta.Parent); p != nil {
pW := p.(sparta.Widget)
pWin := pW.Window().(*window)
win = &window{
w: w,
back: pWin.back,
fore: pWin.fore,
pos: rect.Min,
}
count := len(pW.Property(sparta.Childs).([]sparta.Widget))
pW.SetProperty(sparta.Childs, w)
win.id = w32.CreateWindowEx(0, stringToUTF16(childClass), nil,
uint(w32.WS_CHILDWINDOW|w32.WS_VISIBLE),
rect.Min.X, rect.Min.Y, rect.Dx(), rect.Dy(),
pWin.id, w32.HMENU(count),
w32.HINSTANCE(w32.GetWindowLong(pWin.id, w32.GWL_HINSTANCE)), nil)
if win.id == 0 {
log.Printf("w32: error: %v\n", getLastError())
os.Exit(1)
}
} else {
win = &window{
w: w,
back: bkGround,
fore: frGround,
}
win.id = w32.CreateWindowEx(uint(w32.WS_EX_CLIENTEDGE),
stringToUTF16(baseClass), stringToUTF16(""),
uint(w32.WS_OVERLAPPEDWINDOW),
150, 150, rect.Dx()+extraX, rect.Dy()+extraY,
0, 0, instance, nil)
if win.id == 0 {
log.Printf("w32: error: %v\n", getLastError())
os.Exit(1)
}
}
widgetTable[win.id] = w
w.SetWindow(win)
w32.ShowWindow(win.id, w32.SW_SHOWDEFAULT)
if !w32.UpdateWindow(win.id) {
log.Printf("w32: error: %v\n", getLastError())
os.Exit(1)
}
}