103 lines
2.2 KiB
Go
103 lines
2.2 KiB
Go
// 12 july 2014
|
|
|
|
package ui
|
|
|
|
import (
|
|
"fmt"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
// global messages unique to everything
|
|
const (
|
|
msgRequest = c_WM_APP + 1 + iota // + 1 just to be safe
|
|
)
|
|
|
|
var msgwin uintptr
|
|
|
|
func uiinit() error {
|
|
if err := initWindows(); err != nil {
|
|
return fmt.Errorf("error initializing package ui on Windows: %v", err)
|
|
}
|
|
if err := makemsgwin(); err != nil {
|
|
return fmt.Errorf("error creating message-only window: %v", err)
|
|
}
|
|
if err := makeWindowWindowClass(); err != nil {
|
|
return fmt.Errorf("error creating Window window class: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func uimsgloop() {
|
|
var msg s_MSG
|
|
|
|
for {
|
|
res, err := f_GetMessageW(&msg, hNULL, 0, 0)
|
|
if res < 0 {
|
|
panic(fmt.Errorf("error calling GetMessage(): %v", err))
|
|
}
|
|
if res == 0 { // WM_QUIT
|
|
break
|
|
}
|
|
// TODO IsDialogMessage()
|
|
f_TranslateMessage(&msg)
|
|
f_DispatchMessageW(&msg)
|
|
}
|
|
}
|
|
|
|
func uistop() {
|
|
f_PostQuitMessage(0)
|
|
}
|
|
|
|
func issue(req *Request) {
|
|
res, err := f_PostMessageW(
|
|
msgwin,
|
|
msgRequest,
|
|
0,
|
|
t_LPARAM(uintptr(unsafe.Pointer(req))))
|
|
if res == 0 {
|
|
panic(fmt.Errorf("error issuing request: %v", err))
|
|
}
|
|
}
|
|
|
|
const msgwinclass = "gouimsgwin"
|
|
|
|
func makemsgwin() error {
|
|
var wc s_WNDCLASSW
|
|
|
|
wc.lpfnWndProc = syscall.NewCallback(msgwinproc)
|
|
wc.hInstance = hInstance
|
|
wc.hIcon = hDefaultIcon
|
|
wc.hCursor = hArrowCursor
|
|
wc.hbrBackground = c_COLOR_BTNFACE + 1
|
|
wc.lpszClassName = syscall.StringToUTF16Ptr(msgwinclass)
|
|
res, err := f_RegisterClassW(&wc)
|
|
if res == 0 {
|
|
return fmt.Errorf("error registering message-only window class: %v", err)
|
|
}
|
|
msgwin, err = f_CreateWindowExW(
|
|
0,
|
|
wc.lpszClassName,
|
|
syscall.StringToUTF16Ptr("package ui message-only window"),
|
|
0,
|
|
c_CW_USEDEFAULT, c_CW_USEDEFAULT,
|
|
c_CW_USEDEFAULT, c_CW_USEDEFAULT,
|
|
c_HWND_MESSAGE, hNULL, hInstance, nil)
|
|
if msgwin == hNULL {
|
|
return fmt.Errorf("error creating message-only window: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func msgwinproc(hwnd uintptr, uMsg t_UINT, wParam t_WPARAM, lParam t_LPARAM) t_LRESULT {
|
|
switch uMsg {
|
|
case msgRequest:
|
|
req := (*Request)(unsafe.Pointer(uintptr(lParam)))
|
|
perform(req)
|
|
return 0
|
|
default:
|
|
return f_DefWindowProcW(hwnd, uMsg, wParam, lParam)
|
|
}
|
|
panic(fmt.Errorf("message-only window procedure does not return a value for message %d (bug in msgwinproc())", uMsg))
|
|
}
|