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calendar.c
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calendar.c
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/* ------------- calendar.c ------------- */
#include "dflat.h"
#ifdef INCLUDE_PICTUREBOX
#define CALHEIGHT 17
#define CALWIDTH 33
static int DyMo[] = {31,28,31,30,31,30,31,31,30,31,30,31};
static struct tm ttm;
static int dys[42];
static WINDOW Cwnd;
static void FixDate(void)
{
/* ---- adjust Feb for leap year ---- */
DyMo[1] = (ttm.tm_year % 4) ? 28 : 29;
ttm.tm_mday = min(ttm.tm_mday, DyMo[ttm.tm_mon]);
}
/* ---- build calendar dates array ---- */
static void BuildDateArray(void)
{
int offset, dy = 0;
memset(dys, 0, sizeof dys);
FixDate();
/* ----- compute the weekday for the 1st ----- */
offset = ((ttm.tm_mday-1) - ttm.tm_wday) % 7;
if (offset < 0)
offset += 7;
if (offset)
offset = (offset - 7) * -1;
/* ----- build the dates into the array ---- */
for (dy = 1; dy <= DyMo[ttm.tm_mon]; dy++)
dys[offset++] = dy;
}
static void CreateWindowMsg(WINDOW wnd)
{
int x, y;
DrawBox(wnd, 1, 2, CALHEIGHT-4, CALWIDTH-4);
for (x = 5; x < CALWIDTH-4; x += 4)
DrawVector(wnd, x, 2, CALHEIGHT-4, FALSE);
for (y = 4; y < CALHEIGHT-3; y+=2)
DrawVector(wnd, 1, y, CALWIDTH-4, TRUE);
}
/* remove requirement for strftime() */
static char *months[] = {
"January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December"
};
static void DisplayDates(WINDOW wnd)
{
int week, day;
char dyln[10];
int offset;
char banner[CALWIDTH-1];
char banner1[30];
SetStandardColor(wnd);
PutWindowLine(wnd, "Sun Mon Tue Wed Thu Fri Sat", 2, 1);
memset(banner, ' ', CALWIDTH-2);
sprintf(banner1, "%s %d", months[ttm.tm_mon], ttm.tm_year+1900);
offset = (CALWIDTH-2 - strlen(banner1)) / 2;
strcpy(banner+offset, banner1);
strcat(banner, " ");
PutWindowLine(wnd, banner, 0, 0);
BuildDateArray();
for (week = 0; week < 6; week++) {
for (day = 0; day < 7; day++) {
int dy = dys[week*7+day];
if (dy == 0)
strcpy(dyln, " ");
else {
if (dy == ttm.tm_mday)
sprintf(dyln, "%c%c%c%2d %c",
CHANGECOLOR,
SelectForeground(wnd)+0x80,
SelectBackground(wnd)+0x80,
dy, RESETCOLOR);
else
sprintf(dyln, "%2d ", dy);
}
SetStandardColor(wnd);
PutWindowLine(wnd, dyln, 2 + day * 4, 3 + week*2);
}
}
}
static int KeyboardMsg(WINDOW wnd, PARAM p1)
{
switch ((int)p1) {
case BS:
case UP:
case PGUP:
if (ttm.tm_mon == 0) {
ttm.tm_mon = 12;
ttm.tm_year--;
}
ttm.tm_mon--;
FixDate();
mktime(&ttm);
DisplayDates(wnd);
return TRUE;
case FWD:
case DN:
case PGDN:
ttm.tm_mon++;
if (ttm.tm_mon == 12) {
ttm.tm_mon = 0;
ttm.tm_year++;
}
FixDate();
mktime(&ttm);
DisplayDates(wnd);
return TRUE;
default:
break;
}
return FALSE;
}
static int CalendarProc(WINDOW wnd,MESSAGE msg,
PARAM p1,PARAM p2)
{
switch (msg) {
case CREATE_WINDOW:
DefaultWndProc(wnd, msg, p1, p2);
CreateWindowMsg(wnd);
return TRUE;
case KEYBOARD:
if (KeyboardMsg(wnd, p1))
return TRUE;
break;
case PAINT:
DefaultWndProc(wnd, msg, p1, p2);
DisplayDates(wnd);
return TRUE;
case COMMAND:
if ((int)p1 == ID_HELP) {
DisplayHelp(wnd, "Calendar");
return TRUE;
}
break;
case CLOSE_WINDOW:
Cwnd = NULL;
break;
default:
break;
}
return DefaultWndProc(wnd, msg, p1, p2);
}
void Calendar(WINDOW pwnd)
{
if (Cwnd == NULL) {
time_t tim = time(NULL);
ttm = *localtime(&tim);
Cwnd = CreateWindow(PICTUREBOX,
"Calendar",
-1, -1, CALHEIGHT, CALWIDTH,
NULL, pwnd, CalendarProc,
SHADOW |
MINMAXBOX |
CONTROLBOX |
MOVEABLE |
HASBORDER
);
}
SendMessage(Cwnd, SETFOCUS, TRUE, 0);
}
#endif