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// 22 may 2015
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#include "uipriv_windows.hpp"
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struct uiDateTimePicker {
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uiWindowsControl c;
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HWND hwnd;
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void (*onChanged)(uiDateTimePicker *, void *);
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void *onChangedData;
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};
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// utility functions
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#define GLI(what, buf, n) GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT, what, buf, n)
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// The real date/time picker does a manual replacement of "yy" with "yyyy" for DTS_SHORTDATECENTURYFORMAT.
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// Because we're also duplicating its functionality (see below), we have to do it too.
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static WCHAR *expandYear(WCHAR *dts, int n)
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{
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WCHAR *out;
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WCHAR *p, *q;
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int ny = 0;
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// allocate more than we need to be safe
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out = (WCHAR *) uiprivAlloc((n * 3) * sizeof (WCHAR), "WCHAR[]");
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q = out;
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for (p = dts; *p != L'\0'; p++) {
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// first, if the current character is a y, increment the number of consecutive ys
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// otherwise, stop counting, and if there were only two, add two more to make four
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if (*p != L'y') {
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if (ny == 2) {
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*q++ = L'y';
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*q++ = L'y';
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}
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ny = 0;
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} else
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ny++;
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// next, handle quoted blocks
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// we do this AFTER the above so yy'abc' becomes yyyy'abc' and not yy'abc'yy
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// this handles the case of 'a''b' elegantly as well
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if (*p == L'\'') {
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// copy the opening quote
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*q++ = *p;
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// copy the contents
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for (;;) {
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p++;
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if (*p == L'\'')
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break;
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if (*p == L'\0')
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uiprivImplBug("unterminated quote in system-provided locale date string in expandYear()");
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*q++ = *p;
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}
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// and fall through to copy the closing quote
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}
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// copy the current character
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*q++ = *p;
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}
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// handle trailing yy
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if (ny == 2) {
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*q++ = L'y';
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*q++ = L'y';
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}
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*q++ = L'\0';
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return out;
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}
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// Windows has no combined date/time prebuilt constant; we have to build the format string ourselves
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// TODO use a default format if one fails
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static void setDateTimeFormat(HWND hwnd)
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{
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WCHAR *unexpandedDate, *date;
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WCHAR *time;
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WCHAR *datetime;
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int ndate, ntime;
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ndate = GLI(LOCALE_SSHORTDATE, NULL, 0);
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if (ndate == 0)
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logLastError(L"error getting date string length");
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date = (WCHAR *) uiprivAlloc(ndate * sizeof (WCHAR), "WCHAR[]");
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if (GLI(LOCALE_SSHORTDATE, date, ndate) == 0)
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logLastError(L"error geting date string");
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unexpandedDate = date; // so we can free it
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date = expandYear(unexpandedDate, ndate);
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uiprivFree(unexpandedDate);
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ntime = GLI(LOCALE_STIMEFORMAT, NULL, 0);
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if (ndate == 0)
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logLastError(L"error getting time string length");
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time = (WCHAR *) uiprivAlloc(ntime * sizeof (WCHAR), "WCHAR[]");
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if (GLI(LOCALE_STIMEFORMAT, time, ntime) == 0)
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logLastError(L"error geting time string");
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datetime = strf(L"%s %s", date, time);
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if (SendMessageW(hwnd, DTM_SETFORMAT, 0, (LPARAM) datetime) == 0)
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logLastError(L"error applying format string to date/time picker");
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uiprivFree(datetime);
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uiprivFree(time);
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uiprivFree(date);
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}
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// control implementation
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static void uiDateTimePickerDestroy(uiControl *c)
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{
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uiDateTimePicker *d = uiDateTimePicker(c);
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uiWindowsUnregisterReceiveWM_WININICHANGE(d->hwnd);
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uiWindowsUnregisterWM_NOTIFYHandler(d->hwnd);
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uiWindowsEnsureDestroyWindow(d->hwnd);
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uiFreeControl(uiControl(d));
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}
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uiWindowsControlAllDefaultsExceptDestroy(uiDateTimePicker)
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// the height returned from DTM_GETIDEALSIZE is unreliable; see http://stackoverflow.com/questions/30626549/what-is-the-proper-use-of-dtm-getidealsize-treating-the-returned-size-as-pixels
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// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
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#define entryHeight 14
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static void uiDateTimePickerMinimumSize(uiWindowsControl *c, int *width, int *height)
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{
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uiDateTimePicker *d = uiDateTimePicker(c);
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SIZE s;
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uiWindowsSizing sizing;
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int y;
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s.cx = 0;
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s.cy = 0;
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SendMessageW(d->hwnd, DTM_GETIDEALSIZE, 0, (LPARAM) (&s));
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*width = s.cx;
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y = entryHeight;
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uiWindowsGetSizing(d->hwnd, &sizing);
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uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &y);
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*height = y;
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}
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static BOOL onWM_NOTIFY(uiControl *c, HWND hwnd, NMHDR *nmhdr, LRESULT *lResult)
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{
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uiDateTimePicker *d = uiDateTimePicker(c);
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if (nmhdr->code != DTN_DATETIMECHANGE)
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return FALSE;
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(*(d->onChanged))(d, d->onChangedData);
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*lResult = 0;
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return TRUE;
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}
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static void fromSystemTime(SYSTEMTIME *systime, struct tm *time)
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{
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ZeroMemory(time, sizeof (struct tm));
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time->tm_sec = systime->wSecond;
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time->tm_min = systime->wMinute;
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time->tm_hour = systime->wHour;
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time->tm_mday = systime->wDay;
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time->tm_mon = systime->wMonth - 1;
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time->tm_year = systime->wYear - 1900;
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time->tm_wday = systime->wDayOfWeek;
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time->tm_isdst = -1;
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}
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static void toSystemTime(const struct tm *time, SYSTEMTIME *systime)
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{
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ZeroMemory(systime, sizeof (SYSTEMTIME));
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systime->wYear = time->tm_year + 1900;
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systime->wMonth = time->tm_mon + 1;
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systime->wDayOfWeek = time->tm_wday;
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systime->wDay = time->tm_mday;
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systime->wHour = time->tm_hour;
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systime->wMinute = time->tm_min;
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systime->wSecond = time->tm_sec;
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}
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static void defaultOnChanged(uiDateTimePicker *d, void *data)
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{
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// do nothing
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}
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void uiDateTimePickerTime(uiDateTimePicker *d, struct tm *time)
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{
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SYSTEMTIME systime;
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if (SendMessageW(d->hwnd, DTM_GETSYSTEMTIME, 0, (LPARAM) (&systime)) != GDT_VALID)
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logLastError(L"error getting date and time");
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fromSystemTime(&systime, time);
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}
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void uiDateTimePickerSetTime(uiDateTimePicker *d, const struct tm *time)
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{
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SYSTEMTIME systime;
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toSystemTime(time, &systime);
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if (SendMessageW(d->hwnd, DTM_SETSYSTEMTIME, GDT_VALID, (LPARAM) (&systime)) == 0)
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logLastError(L"error setting date and time");
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}
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void uiDateTimePickerOnChanged(uiDateTimePicker *d, void (*f)(uiDateTimePicker *, void *), void *data)
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{
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d->onChanged = f;
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d->onChangedData = data;
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}
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static uiDateTimePicker *finishNewDateTimePicker(DWORD style)
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{
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uiDateTimePicker *d;
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uiWindowsNewControl(uiDateTimePicker, d);
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d->hwnd = uiWindowsEnsureCreateControlHWND(WS_EX_CLIENTEDGE,
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DATETIMEPICK_CLASSW, L"",
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style | WS_TABSTOP,
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hInstance, NULL,
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TRUE);
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// automatically update date/time format when user changes locale settings
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// for the standard styles, this is in the date-time picker itself
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// for our date/time mode, we do it in a subclass assigned in uiNewDateTimePicker()
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uiWindowsRegisterReceiveWM_WININICHANGE(d->hwnd);
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uiWindowsRegisterWM_NOTIFYHandler(d->hwnd, onWM_NOTIFY, uiControl(d));
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uiDateTimePickerOnChanged(d, defaultOnChanged, NULL);
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return d;
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}
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static LRESULT CALLBACK datetimepickerSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
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{
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switch (uMsg) {
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case WM_WININICHANGE:
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// we can optimize this by only doing it when the real date/time picker does it
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// unfortunately, I don't know when that is :/
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// hopefully this won't hurt
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setDateTimeFormat(hwnd);
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return 0;
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case WM_NCDESTROY:
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if (RemoveWindowSubclass(hwnd, datetimepickerSubProc, uIdSubclass) == FALSE)
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logLastError(L"error removing date-time picker locale change handling subclass");
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break;
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}
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return DefSubclassProc(hwnd, uMsg, wParam, lParam);
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}
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uiDateTimePicker *uiNewDateTimePicker(void)
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{
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uiDateTimePicker *d;
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d = finishNewDateTimePicker(0);
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setDateTimeFormat(d->hwnd);
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if (SetWindowSubclass(d->hwnd, datetimepickerSubProc, 0, (DWORD_PTR) d) == FALSE)
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logLastError(L"error subclassing date-time-picker to assist in locale change handling");
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// TODO set a suitable default in this case
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return d;
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}
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uiDateTimePicker *uiNewDatePicker(void)
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{
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return finishNewDateTimePicker(DTS_SHORTDATECENTURYFORMAT);
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}
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uiDateTimePicker *uiNewTimePicker(void)
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{
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return finishNewDateTimePicker(DTS_TIMEFORMAT);
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}
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