private unsafe bool GetCalendarGridInfoText(MCGIP dwPart, int calendarIndex, int row, int column, out string text)
{
const int nameLength = 128;
Span <char> name = stackalloc char[nameLength + 2];
bool result;
fixed(char *pName = name)
{
var gridInfo = new MCGRIDINFO
{
cbSize = (uint)sizeof(MCGRIDINFO),
dwFlags = MCGIF.NAME,
dwPart = dwPart,
iCalendar = calendarIndex,
iCol = column,
iRow = row,
pszName = pName,
cchName = (uint)name.Length - 1
};
result = User32.SendMessageW(_owner, (User32.WM)MCM.GETCALENDARGRIDINFO, IntPtr.Zero, ref gridInfo) != IntPtr.Zero;
}
text = name.SliceAtFirstNull().ToString();
return(result);
}
private unsafe bool GetCalendarGridInfo(
MCGIF dwFlags,
MCGIP dwPart,
int calendarIndex,
int row,
int column,
out RECT rectangle,
out Kernel32.SYSTEMTIME endDate,
out Kernel32.SYSTEMTIME startDate)
{
Debug.Assert(
(dwFlags & ~(MCGIF.DATE | MCGIF.RECT)) == 0,
"GetCalendarGridInfo() should be used only to obtain Date and Rect,"
+ "dwFlags has flag bits other that MCGIF_DATE and MCGIF_RECT");
var gridInfo = new MCGRIDINFO
{
cbSize = (uint)sizeof(MCGRIDINFO),
dwFlags = dwFlags,
dwPart = dwPart,
iCalendar = calendarIndex,
iCol = column,
iRow = row
};
try
{
bool result = GetCalendarGridInfo(ref gridInfo);
rectangle = gridInfo.rc;
endDate = gridInfo.stEnd;
startDate = gridInfo.stStart;
return(result);
}
catch
{
rectangle = new RECT();
endDate = new Kernel32.SYSTEMTIME();
startDate = new Kernel32.SYSTEMTIME();
return(false);
}
}
public bool GetCalendarPartRectangle(int calendarIndex, MCGIP dwPart, int row, int column, out RECT calendarPartRectangle)
{
bool success = GetCalendarGridInfo(
MCGIF.RECT,
dwPart,
calendarIndex,
row,
column,
out calendarPartRectangle,
out Kernel32.SYSTEMTIME endDate, out Kernel32.SYSTEMTIME startDate);
if (success)
{
success = User32.MapWindowPoints(new HandleRef(this, Owner.Handle), new HandleRef(null, IntPtr.Zero), ref calendarPartRectangle, 2) != 0;
}
if (!success)
{
calendarPartRectangle = new RECT();
}
return(success);
}
