func NewComboBox(parent Container) (*ComboBox, error) {
cb, err := newComboBoxWithStyle(parent, win.CBS_DROPDOWN)
if err != nil {
return nil, err
}
editHwnd := win.GetWindow(cb.hWnd, win.GW_CHILD)
win.SetWindowLongPtr(editHwnd, win.GWLP_USERDATA, uintptr(unsafe.Pointer(cb)))
cb.editOrigWndProcPtr = win.SetWindowLongPtr(editHwnd, win.GWLP_WNDPROC, comboBoxEditWndProcPtr)
return cb, nil
}
// NewNotifyIcon creates and returns a new NotifyIcon.
//
// The NotifyIcon is initially not visible.
func NewNotifyIcon() (*NotifyIcon, error) {
// Create the message-only window for the NotifyIcon.
hWnd := win.CreateWindowEx(
0,
syscall.StringToUTF16Ptr(notifyIconWindowClass),
nil,
0,
0,
0,
0,
0,
win.HWND_MESSAGE,
0,
0,
nil)
if hWnd == 0 {
return nil, lastError("CreateWindowEx")
}
// Add our notify icon to the status area and make sure it is hidden.
nid := win.NOTIFYICONDATA{
HWnd: hWnd,
UFlags: win.NIF_MESSAGE | win.NIF_STATE,
DwState: win.NIS_HIDDEN,
DwStateMask: win.NIS_HIDDEN,
UCallbackMessage: notifyIconMessageId,
}
nid.CbSize = uint32(unsafe.Sizeof(nid))
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
}
ni := &NotifyIcon{
id: nid.UID,
hWnd: hWnd,
contextMenu: menu,
}
// Set our *NotifyIcon as user data for the message window.
win.SetWindowLongPtr(hWnd, win.GWLP_USERDATA, uintptr(unsafe.Pointer(ni)))
return ni, nil
}
// InitWindow initializes a window.
//
// Widgets should be initialized using InitWidget instead.
func InitWindow(window, parent Window, className string, style, exStyle uint32) error {
wb := window.AsWindowBase()
wb.window = window
wb.enabled = true
wb.visible = true
wb.name2Property = make(map[string]Property)
var hwndParent win.HWND
if parent != nil {
hwndParent = parent.Handle()
if widget, ok := window.(Widget); ok {
if container, ok := parent.(Container); ok {
widget.AsWidgetBase().parent = container
}
}
}
wb.hWnd = win.CreateWindowEx(
exStyle,
syscall.StringToUTF16Ptr(className),
nil,
style|win.WS_CLIPSIBLINGS,
win.CW_USEDEFAULT,
win.CW_USEDEFAULT,
win.CW_USEDEFAULT,
win.CW_USEDEFAULT,
hwndParent,
0,
0,
nil)
if wb.hWnd == 0 {
return lastError("CreateWindowEx")
}
succeeded := false
defer func() {
if !succeeded {
wb.Dispose()
}
}()
hwnd2WindowBase[wb.hWnd] = wb
if !registeredWindowClasses[className] {
// We subclass all windows of system classes.
wb.origWndProcPtr = win.SetWindowLongPtr(wb.hWnd, win.GWLP_WNDPROC, defaultWndProcPtr)
if wb.origWndProcPtr == 0 {
return lastError("SetWindowLongPtr")
}
}
setWindowFont(wb.hWnd, defaultFont)
if form, ok := window.(Form); ok {
if fb := form.AsFormBase(); fb != nil {
if err := fb.init(form); err != nil {
return err
}
}
}
if widget, ok := window.(Widget); ok {
if wb := widget.AsWidgetBase(); wb != nil {
if err := wb.init(widget); err != nil {
return err
}
}
}
wb.enabledProperty = NewBoolProperty(
func() bool {
return wb.window.Enabled()
},
func(b bool) error {
wb.window.SetEnabled(b)
return nil
},
wb.enabledChangedPublisher.Event())
wb.visibleProperty = NewBoolProperty(
func() bool {
return window.Visible()
},
func(b bool) error {
wb.window.SetVisible(b)
return nil
},
wb.visibleChangedPublisher.Event())
wb.MustRegisterProperty("Enabled", wb.enabledProperty)
wb.MustRegisterProperty("Visible", wb.visibleProperty)
succeeded = true
return nil
}