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|
// 12 july 2014
package ui
import (
"fmt"
"syscall"
"unsafe"
)
type window struct {
hwnd uintptr
shownbefore bool
closing *event
}
const windowclassname = "gouiwindow"
var windowclassptr = syscall.StringToUTF16Ptr(windowclassname)
func makeWindowWindowClass() error {
var wc s_WNDCLASSW
wc.lpfnWndProc = syscall.NewCallback(windowWndProc)
wc.hInstance = hInstance
wc.hIcon = hDefaultIcon
wc.hCursor = hArrowCursor
wc.hbrBackground = c_COLOR_BTNFACE + 1
wc.lpszClassName = windowclassptr
res, err := f_RegisterClassW(&wc)
if res == 0 {
return fmt.Errorf("error registering Window window class: %v", err)
}
return nil
}
func newWindow(title string, width int, height int) *Request {
c := make(chan interface{})
return &Request{
op: func() {
w := &window{
// hwnd set in WM_CREATE handler
closing: newEvent(),
}
hwnd, err := f_CreateWindowExW(
0,
windowclassptr,
syscall.StringToUTF16Ptr(title),
c_WS_OVERLAPPEDWINDOW,
c_CW_USEDEFAULT, c_CW_USEDEFAULT,
uintptr(width), uintptr(height),
hNULL, hNULL, hInstance, unsafe.Pointer(w))
if hwnd == hNULL {
panic(fmt.Errorf("Window creation failed: %v", err))
} else if hwnd != w.hwnd {
panic(fmt.Errorf("inconsistency: hwnd returned by CreateWindowEx() (%p) and hwnd stored in window (%p) differ", hwnd, w.hwnd))
}
c <- w
},
resp: c,
}
}
func (w *window) SetControl(control Control) *Request {
c := make(chan interface{})
return &Request{
op: func() {
// TODO unparent
// TODO reparent
c <- struct{}{}
},
resp: c,
}
}
func (w *window) Title() *Request {
c := make(chan interface{})
return &Request{
op: func() {
c <- getWindowText(w.hwnd)
},
resp: c,
}
}
func (w *window) SetTitle(title string) *Request {
c := make(chan interface{})
return &Request{
op: func() {
setWindowText(w.hwnd, title, []t_LRESULT{c_FALSE})
c <- struct{}{}
},
resp: c,
}
}
func (w *window) Show() *Request {
c := make(chan interface{})
return &Request{
op: func() {
if !w.shownbefore {
// TODO get rid of need for cast
f_ShowWindow(w.hwnd, uintptr(nCmdShow))
updateWindow(w.hwnd, "Window.Show()")
w.shownbefore = true
} else {
f_ShowWindow(w.hwnd, c_SW_SHOW)
}
c <- struct{}{}
},
resp: c,
}
}
func (w *window) Hide() *Request {
c := make(chan interface{})
return &Request{
op: func() {
f_ShowWindow(w.hwnd, c_SW_HIDE)
c <- struct{}{}
},
resp: c,
}
}
func (w *window) Close() *Request {
c := make(chan interface{})
return &Request{
op: func() {
// TODO
c <- struct{}{}
},
resp: c,
}
}
func (w *window) OnClosing(e func(Doer) bool) *Request {
c := make(chan interface{})
return &Request{
op: func() {
w.closing.setbool(e)
c <- struct{}{}
},
resp: c,
}
}
func windowWndProc(hwnd uintptr, msg t_UINT, wParam t_WPARAM, lParam t_LPARAM) t_LRESULT {
w := (*window)(unsafe.Pointer(f_GetWindowLongPtrW(hwnd, c_GWLP_USERDATA)))
if w == nil {
// the lpParam is available during WM_NCCREATE and WM_CREATE
if msg == c_WM_NCCREATE {
storelpParam(hwnd, lParam)
w := (*window)(unsafe.Pointer(f_GetWindowLongPtrW(hwnd, c_GWLP_USERDATA)))
w.hwnd = hwnd
}
// act as if we're not ready yet, even during WM_NCCREATE (nothing important to the switch statement below happens here anyway)
return f_DefWindowProcW(hwnd, msg, wParam, lParam)
}
switch msg {
default:
return f_DefWindowProcW(hwnd, msg, wParam, lParam)
}
panic(fmt.Errorf("Window message %d does not return a value (bug in windowWndProc())", msg))
}
// TODO
func newButton(string)*Request{return nil}
|
