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Changed handling of WS_TABSTOP in uiTab so that it is only applied if there are tabs. This gets rid of the need for our complex HasTabStops() handling.

This commit is contained in:
Pietro Gagliardi 2015-06-01 21:46:39 -04:00
parent d90eeb84f7
commit 54d727bf42
1 changed files with 25 additions and 2 deletions
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27
redo/windows/tab.c
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@ -38,6 +38,24 @@ static void showHidePage(struct tab *t, LRESULT which, int hide)
}
}
// see below for issues
static void updateWS_TABSTOP(HWND hwnd)
{
LRESULT n;
DWORD le;
SetLastError(0);
n = SendMessageW(hwnd, TCM_GETITEMCOUNT, 0, 0);
le = GetLastError();
SetLastError(le); // just to be safe
if (n != 0)
setStyle(hwnd, getStyle(hwnd) | WS_TABSTOP);
else if (le == 0) // truly no tabs
setStyle(hwnd, getStyle(hwnd) & ~WS_TABSTOP);
else
logLastError("error getting number of tabs in updateWS_TABSTOP()");
}
// control implementation
static BOOL onWM_NOTIFY(uiControl *c, HWND hwnd, NMHDR *nm, LRESULT *lResult)
@ -164,6 +182,8 @@ static void tabInsertAt(uiTab *tt, const char *name, uintmax_t n, uiControl *chi
showHidePage(t, hide, 1);
showHidePage(t, show, 0);
}
updateWS_TABSTOP(t->hwnd);
}
static void tabDelete(uiTab *tt, uintmax_t n)
@ -184,6 +204,8 @@ static void tabDelete(uiTab *tt, uintmax_t n)
tabPagePreserveChild(page);
uiControlSetParent(page, NULL);
uiControlDestroy(page);
updateWS_TABSTOP(t->hwnd);
}
static uintmax_t tabNumPages(uiTab *tt)
@ -220,7 +242,8 @@ uiTab *uiNewTab(void)
t->hwnd = uiWindowsUtilCreateControlHWND(0, // don't set WS_EX_CONTROLPARENT yet; we do that dynamically in the message loop (see main_windows.c)
WC_TABCONTROLW, L"",
TCS_TOOLTIPS | WS_TABSTOP, // start with this; we will alternate between this and WS_EX_CONTROLPARENT as needed (see main.c and msgHasTabStops above and the toggling functions below)
// don't give WS_TABSTOP here; we only apply WS_TABSTOP if there are tabs
TCS_TOOLTIPS,
hInstance, NULL,
TRUE);
@ -258,5 +281,5 @@ void tabEnterTabNavigation(HWND hwnd)
void tabLeaveTabNavigation(HWND hwnd)
{
setExStyle(hwnd, getExStyle(hwnd) & ~WS_EX_CONTROLPARENT);
setStyle(hwnd, getStyle(hwnd) | WS_TABSTOP);
updateWS_TABSTOP(hwnd);
}