diff options
| -rw-r--r-- | experiments/winclientsize.go | 47 | ||||
| -rw-r--r-- | windows_windows.go | 1 |
2 files changed, 48 insertions, 0 deletions
diff --git a/experiments/winclientsize.go b/experiments/winclientsize.go new file mode 100644 index 0000000..fccccb9 --- /dev/null +++ b/experiments/winclientsize.go @@ -0,0 +1,47 @@ +func (s *sysData) setWindowSize(width int, height int) error { + var rect _RECT + + ret := make(chan uiret) + defer close(ret) + // we need the size to cover only the client rect + // unfortunately, Windows only provides general client->window rect conversion functions (AdjustWindowRect()/AdjustWindowRectEx()), not any that can pull from an existing window + // so as long as we don't change the window styles during execution we're good + // now we tell it to adjust (0,0)..(width,height); this will give us the approrpiate rect to get the proper width/height from + // then we call SetWindowPos() to set the size without moving the window + // see also: http://blogs.msdn.com/b/oldnewthing/archive/2003/09/11/54885.aspx + // TODO do the WM_NCCALCSIZE stuff on that post when adding menus + rect.Right = int32(width) + rect.Bottom = int32(height) + uitask <- &uimsg{ + call: _adjustWindowRectEx, + p: []uintptr{ + uintptr(unsafe.Pointer(&rect)), + uintptr(classTypes[c_window].style), + uintptr(_FALSE), // TODO change this when adding menus + uintptr(classTypes[c_window].xstyle), + }, + ret: ret, + } + r := <-ret + if r.ret == 0 { // failure + panic(fmt.Errorf("error computing window rect from client rect for resize: %v", r.err)) + } + uitask <- &uimsg{ + call: _setWindowPos, + p: []uintptr{ + uintptr(s.hwnd), + uintptr(_NULL), // not changing the Z-order + uintptr(0), + uintptr(0), + uintptr(rect.Right - rect.Left), + uintptr(rect.Bottom - rect.Top), + uintptr(_SWP_NOMOVE | _SWP_NOZORDER), + }, + ret: ret, + } + r = <-ret + if r.ret == 0 { // failure + return fmt.Errorf("error actually resizing window: %v", r.err) + } + return nil +} diff --git a/windows_windows.go b/windows_windows.go index f626382..aa3d5c2 100644 --- a/windows_windows.go +++ b/windows_windows.go @@ -166,6 +166,7 @@ const ( ) var ( + _adjustWindowRectEx = user32.NewProc("AdjustWindowRectEx") _createWindowEx = user32.NewProc("CreateWindowExW") _getClientRect = user32.NewProc("GetClientRect") _moveWindow = user32.NewProc("MoveWindow") |