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Added the code for the subclassing. And it smashes the stack. Wonderful...

This commit is contained in:
Pietro Gagliardi 2014-07-17 18:36:44 -04:00
parent 51a3c0e379
commit 257fd8f07c
2 changed files with 21 additions and 8 deletions
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4
redo/comctl32_windows.go
View File

@ -102,8 +102,8 @@ func f_RemoveWindowSubclass(hwnd uintptr, subproc uintptr, id t_UINT_PTR) (uintp
return r1, err
}
func f_DefSubclassProc(hwnd uintptr, uMsg t_UINT, wParam t_WPARAM, lParam t_LPARAM, id t_UINT_PTR, data t_DWORD_PTR) t_LRESULT {
r1, _, _ := fv_DefSubclassProc.Call(hwnd, uintptr(uMsg), uintptr(wParam), uintptr(lParam), uintptr(id), uintptr(data))
func f_DefSubclassProc(hwnd uintptr, uMsg t_UINT, wParam t_WPARAM, lParam t_LPARAM) t_LRESULT {
r1, _, _ := fv_DefSubclassProc.Call(hwnd, uintptr(uMsg), uintptr(wParam), uintptr(lParam))
return t_LRESULT(r1)
}

25
redo/controls_windows.go
View File

@ -100,10 +100,15 @@ func newButton(text string) *Request {
c_BS_PUSHBUTTON | c_WS_TABSTOP,
0)
setWindowText(w.hwnd, text, []t_LRESULT{c_FALSE})
c <- &button{
b := &button{
widgetbase: w,
clicked: newEvent(),
}
res, err := f_SetWindowSubclass(w.hwnd, buttonsubprocptr, 0, t_DWORD_PTR(uintptr(unsafe.Pointer(b))))
if res == c_FALSE {
panic(fmt.Errorf("error subclassing Button to give it its own event handler: %v", err))
}
c <- b
},
resp: c,
}
@ -128,7 +133,12 @@ func (b *button) SetText(text string) *Request {
return b.settext(text)
}
var buttonsubprocptr = syscall.NewCallback(buttonSubProc)
var buttonsubprocptr uintptr
// to avoid recursive initialization loop
func init() {
buttonsubprocptr = syscall.NewCallback(buttonSubProc)
}
func buttonSubProc(hwnd uintptr, uMsg t_UINT, wParam t_WPARAM, lParam t_LPARAM, id t_UINT_PTR, data t_DWORD_PTR) t_LRESULT {
b := (*button)(unsafe.Pointer(uintptr(data)))
@ -139,12 +149,15 @@ func buttonSubProc(hwnd uintptr, uMsg t_UINT, wParam t_WPARAM, lParam t_LPARAM,
println("button clicked")
return 0
}
// TODO return
return f_DefSubclassProc(hwnd, uMsg, wParam, lParam)
case c_WM_NCDESTROY:
// TODO remove
// TODO return
res, err := f_RemoveWindowSubclass(b.hwnd, buttonsubprocptr, id)
if res == c_FALSE {
panic(fmt.Errorf("error removing Button subclass (which was for its own event handler): %v", err))
}
return f_DefSubclassProc(hwnd, uMsg, wParam, lParam)
default:
// TODO return
return f_DefSubclassProc(hwnd, uMsg, wParam, lParam)
}
panic(fmt.Errorf("Button message %d does not return a value (bug in buttonSubProc())", uMsg))
}