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+ fix: center system's MessageBox() hook

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This commit is contained in:
Rainer Kottenhoff 2019-11-21 23:49:49 +01:00
parent 59895bfbde
commit ffff6b5390
1 changed files with 46 additions and 14 deletions
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60
src/Dialogs.c
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@ -68,28 +68,61 @@ static HHOOK s_hhkMsgBox = NULL;
static LRESULT CALLBACK CenterInParentHook(INT nCode, WPARAM wParam, LPARAM lParam)
{
// notification that a window is about to be activated
if (nCode == HCBT_ACTIVATE) {
// set window handles
HWND const hChildWnd = (HWND)wParam; // window handle is wParam
HWND const hParentWnd = GetParent(hChildWnd);
if (nCode == HCBT_CREATEWND)
{
// get window handles
LPCREATESTRUCT const pCreateStructure = ((LPCBT_CREATEWND)lParam)->lpcs;
HWND const hThisWnd = (HWND)wParam;
HWND const hParentWnd = pCreateStructure->hwndParent; // GetParent(hThisWnd);
RECT rParent, rChild, rDesktop;
if ((hParentWnd && hChildWnd) &&
if ((hParentWnd && hThisWnd) &&
(GetWindowRect(GetDesktopWindow(), &rDesktop) == TRUE) &&
(GetWindowRect(hParentWnd, &rParent) == TRUE) &&
(GetWindowRect(hChildWnd, &rChild) == TRUE))
(GetWindowRect(hThisWnd, &rChild) == TRUE))
{
// calculate message box dimensions
LONG const nWidth = (LONG)pCreateStructure->cx;
LONG const nHeight = (LONG)pCreateStructure->cy;
// calculate parent window center point
POINT pCenter, pStart;
pCenter.x = rParent.left + ((rParent.right - rParent.left) / 2);
pCenter.y = rParent.top + ((rParent.bottom - rParent.top) / 2);
// calculate message box starting point
pStart.x = (pCenter.x - (nWidth / 2));
pStart.y = (pCenter.y - (nHeight / 2));
// adjust if message box is off desktop
if (pStart.x < 0) pStart.x = 0;
if (pStart.y < 0) pStart.y = 0;
if (pStart.x + nWidth > rDesktop.right) {
pStart.x = rDesktop.right - nWidth;
}
if (pStart.y + nHeight > rDesktop.bottom) {
pStart.y = rDesktop.bottom - nHeight;
}
// set new coordinates
pCreateStructure->x = pStart.x;
pCreateStructure->y = pStart.y;
// we are done
if (s_hhkMsgBox) {
UnhookWindowsHookEx(s_hhkMsgBox);
s_hhkMsgBox = NULL;
}
CenterDlgInParent(hChildWnd, hParentWnd);
PostMessage(hChildWnd, WM_SETFOCUS, 0, 0);
PostMessage(hChildWnd, WM_PAINT, 0, 0);
// set Notepad3 dialog icon
if (Globals.hDlgIcon) { SendMessage(hThisWnd, WM_SETICON, ICON_SMALL, (LPARAM)Globals.hDlgIcon); }
}
else if (s_hhkMsgBox) {
// continue with any possible chained hooks
return CallNextHookEx(s_hhkMsgBox, nCode, wParam, lParam);
}
}
// continue with any possible chained hooks
return s_hhkMsgBox ? CallNextHookEx(s_hhkMsgBox, nCode, wParam, lParam) : 0;
return (LRESULT)0;
}
// -----------------------------------------------------------------------------
@ -3666,8 +3699,7 @@ void CenterDlgInParent(HWND hDlg, HWND hDlgParent /* = NULL */)
else
y = rcParent.top + 60;
SetWindowPos(hDlg, NULL, clampi(x, xMin, xMax), clampi(y, yMin, yMax), 0, 0, SWP_NOZORDER | SWP_NOSIZE);
SetWindowPos(hDlg, NULL, clampi(x, xMin, xMax), clampi(y, yMin, yMax), 0, 0, SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOSIZE);
}
//~SnapToDefaultButton(hDlg);
}