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// 22 may 2015
#include "uipriv_windows.hpp"
struct uiDateTimePicker {
uiWindowsControl c;
HWND hwnd;
};
// utility functions
#define GLI(what, buf, n) GetLocaleInfoEx(LOCALE_NAME_USER_DEFAULT, what, buf, n)
// The real date/time picker does a manual replacement of "yy" with "yyyy" for DTS_SHORTDATECENTURYFORMAT.
// Because we're also duplicating its functionality (see below), we have to do it too.
static WCHAR *expandYear(WCHAR *dts, int n)
{
WCHAR *out;
WCHAR *p, *q;
int ny = 0;
// allocate more than we need to be safe
out = (WCHAR *) uiAlloc((n * 3) * sizeof (WCHAR), "WCHAR[]");
q = out;
for (p = dts; *p != L'\0'; p++) {
// first, if the current character is a y, increment the number of consecutive ys
// otherwise, stop counting, and if there were only two, add two more to make four
if (*p != L'y') {
if (ny == 2) {
*q++ = L'y';
*q++ = L'y';
}
ny = 0;
} else
ny++;
// next, handle quoted blocks
// we do this AFTER the above so yy'abc' becomes yyyy'abc' and not yy'abc'yy
// this handles the case of 'a''b' elegantly as well
if (*p == L'\'') {
// copy the opening quote
*q++ = *p;
// copy the contents
for (;;) {
p++;
if (*p == L'\'')
break;
if (*p == L'\0')
implbug("unterminated quote in system-provided locale date string in expandYear()");
*q++ = *p;
}
// and fall through to copy the closing quote
}
// copy the current character
*q++ = *p;
}
// handle trailing yy
if (ny == 2) {
*q++ = L'y';
*q++ = L'y';
}
*q++ = L'\0';
return out;
}
// Windows has no combined date/time prebuilt constant; we have to build the format string ourselves
// TODO use a default format if one fails
static void setDateTimeFormat(HWND hwnd)
{
WCHAR *unexpandedDate, *date;
WCHAR *time;
WCHAR *datetime;
int ndate, ntime;
ndate = GLI(LOCALE_SSHORTDATE, NULL, 0);
if (ndate == 0)
logLastError(L"error getting date string length");
date = (WCHAR *) uiAlloc(ndate * sizeof (WCHAR), "WCHAR[]");
if (GLI(LOCALE_SSHORTDATE, date, ndate) == 0)
logLastError(L"error geting date string");
unexpandedDate = date; // so we can free it
date = expandYear(unexpandedDate, ndate);
uiFree(unexpandedDate);
ntime = GLI(LOCALE_STIMEFORMAT, NULL, 0);
if (ndate == 0)
logLastError(L"error getting time string length");
time = (WCHAR *) uiAlloc(ntime * sizeof (WCHAR), "WCHAR[]");
if (GLI(LOCALE_STIMEFORMAT, time, ntime) == 0)
logLastError(L"error geting time string");
datetime = strf(L"%s %s", date, time);
if (SendMessageW(hwnd, DTM_SETFORMAT, 0, (LPARAM) datetime) == 0)
logLastError(L"error applying format string to date/time picker");
uiFree(datetime);
uiFree(time);
uiFree(date);
}
// control implementation
static void uiDateTimePickerDestroy(uiControl *c)
{
uiDateTimePicker *d = uiDateTimePicker(c);
uiWindowsUnregisterReceiveWM_WININICHANGE(d->hwnd);
uiWindowsEnsureDestroyWindow(d->hwnd);
uiFreeControl(uiControl(d));
}
uiWindowsControlAllDefaultsExceptDestroy(uiDateTimePicker)
// 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
// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
#define entryHeight 14
static void uiDateTimePickerMinimumSize(uiWindowsControl *c, int *width, int *height)
{
uiDateTimePicker *d = uiDateTimePicker(c);
SIZE s;
uiWindowsSizing sizing;
int y;
s.cx = 0;
s.cy = 0;
SendMessageW(d->hwnd, DTM_GETIDEALSIZE, 0, (LPARAM) (&s));
*width = s.cx;
y = entryHeight;
uiWindowsGetSizing(d->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &y);
*height = y;
}
static uiDateTimePicker *finishNewDateTimePicker(DWORD style)
{
uiDateTimePicker *d;
uiWindowsNewControl(uiDateTimePicker, d);
d->hwnd = uiWindowsEnsureCreateControlHWND(WS_EX_CLIENTEDGE,
DATETIMEPICK_CLASSW, L"",
style | WS_TABSTOP,
hInstance, NULL,
TRUE);
// automatically update date/time format when user changes locale settings
// for the standard styles, this is in the date-time picker itself
// for our date/time mode, we do it in a subclass assigned in uiNewDateTimePicker()
uiWindowsRegisterReceiveWM_WININICHANGE(d->hwnd);
return d;
}
static LRESULT CALLBACK datetimepickerSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
switch (uMsg) {
case WM_WININICHANGE:
// we can optimize this by only doing it when the real date/time picker does it
// unfortunately, I don't know when that is :/
// hopefully this won't hurt
setDateTimeFormat(hwnd);
return 0;
case WM_NCDESTROY:
if (RemoveWindowSubclass(hwnd, datetimepickerSubProc, uIdSubclass) == FALSE)
logLastError(L"error removing date-time picker locale change handling subclass");
break;
}
return DefSubclassProc(hwnd, uMsg, wParam, lParam);
}
uiDateTimePicker *uiNewDateTimePicker(void)
{
uiDateTimePicker *d;
d = finishNewDateTimePicker(0);
setDateTimeFormat(d->hwnd);
if (SetWindowSubclass(d->hwnd, datetimepickerSubProc, 0, (DWORD_PTR) d) == FALSE)
logLastError(L"error subclassing date-time-picker to assist in locale change handling");
// TODO set a suitable default in this case
return d;
}
uiDateTimePicker *uiNewDatePicker(void)
{
return finishNewDateTimePicker(DTS_SHORTDATECENTURYFORMAT);
}
uiDateTimePicker *uiNewTimePicker(void)
{
return finishNewDateTimePicker(DTS_TIMEFORMAT);
}
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