// Calendar.cpp : implementation file

#include "stdafx.h"
#include "Calendar.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

BEGIN_MESSAGE_MAP(CCalendar, CButton)
  //{{AFX_MSG_MAP(CCalendar)
  ON_WM_LBUTTONDOWN()
  //}}AFX_MSG_MAP
END_MESSAGE_MAP()

const BYTE CCalendar::GapWidth     =4;
const BYTE CCalendar::GapHeight    =4;
const BYTE CCalendar::ButtonsAcross=7;
const BYTE CCalendar::ButtonsDown  =6;
const BYTE CCalendar::MaxButtons   =ButtonsAcross*ButtonsDown;

void CCalendar::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) {
  CDC& dc=*CDC::FromHandle(lpDrawItemStruct->hDC);
  CRect Rect(lpDrawItemStruct->rcItem);
  dc.DrawEdge(&Rect, EDGE_SUNKEN, BF_RECT);
  TitleHeight=2*dc.GetTextExtent("_^~g").cy;
  CRect TitleRect(Rect);
  Rect.top+=TitleHeight+GapHeight; //Rect is now the Button space
  TitleRect.bottom=Rect.top;
  TitleRect.top+=GapHeight;
  if(!Rects) {
    Rects=new CRect[MaxButtons];
    ButtonWidth =(Rect.Width ()-(ButtonsAcross+1)*GapWidth )/ButtonsAcross;
    ButtonHeight=(Rect.Height()-(ButtonsDown  +1)*GapHeight)/ButtonsDown;
    for(BYTE i=0; i<MaxButtons; ++i) Rects[i].SetRect((i % ButtonsAcross)*(GapWidth +ButtonWidth )+GapWidth            , Rect.top+((i/ButtonsAcross) % ButtonsDown)*(GapHeight+ButtonHeight)+GapHeight,
                                                      (i % ButtonsAcross)*(GapWidth +ButtonWidth )+GapWidth+ButtonWidth, Rect.top+((i/ButtonsAcross) % ButtonsDown)*(GapHeight+ButtonHeight)+GapHeight+ButtonHeight);
    CRect Wnd;
    GetWindowRect(&Wnd);
    GetParent()->ScreenToClient(&Wnd);
    Wnd.right =Rect.left+Wnd.left+ButtonsAcross*(ButtonWidth +GapWidth )+GapWidth ;
    Wnd.bottom=Rect.top +Wnd.top +ButtonsDown  *(ButtonHeight+GapHeight)+GapHeight;
    MoveWindow(&Wnd);
    return; //The MoveWindow will force a Redraw so we don't need to go on.
  }
  const CString Days[]={"Mon","Tue","Wed","Thu","Fri","Sat","Sun"};
  for(BYTE i=0; i<7; ++i) {
    CRect Rect(Rects[i]);
    Rect.top   =TitleRect.top;
    Rect.bottom=TitleRect.bottom;
    dc.DrawText(Days[i], &Rect, DT_CENTER | DT_NOCLIP | DT_NOPREFIX | DT_VCENTER | DT_SINGLELINE);
    dc.DrawEdge(&Rect, EDGE_ETCHED, BF_RECT);
  }
  CString S;
  for(i=0; i<Buttons; ++i) { //Draw the Day buttons:
    DayProps& Today=Settings[i];
    if(Today.BgColor!=GetSysColor(COLOR_BTNFACE)) {
      dc.SetBkColor(Today.BgColor);
      dc.FillSolidRect(&Rects[i+FirstDay], Today.BgColor);
    }
    S.Format("%u\r\n", i+1);
    dc.SetTextColor(Today.TextColor);
    dc.DrawText(S+Today.Text, &Rects[i+FirstDay], DT_CENTER | DT_NOPREFIX | DT_TOP | DT_WORDBREAK);
    dc.SetBkColor  (GetSysColor(COLOR_BTNFACE));
    dc.SetTextColor(GetSysColor(COLOR_BTNTEXT));
    dc.DrawEdge(&Rects[i+FirstDay], (i==Day-1 ? EDGE_SUNKEN : EDGE_RAISED), BF_RECT);
} }

void CCalendar::OnLButtonDown(UINT nFlags, CPoint point) {
  BYTE Button=ButtonFromPoint(point);
  if((nFlags==MK_LBUTTON) && (Button!=0xFF) && Button!=Day-1) {
    OnChanging();
    Day=Button+1; //Day is 1 Based.
    OnChanged();
  }
  CButton::OnLButtonDown(nFlags, point);
}

BYTE CCalendar::ButtonFromPoint(CPoint point) {
  if((point.y-=TitleHeight)<0) return 0xFF;
  if((point.x % (GapWidth +ButtonWidth )<GapWidth ) //Fail if a gap was clicked.
  || (point.y % (GapHeight+ButtonHeight)<GapHeight)) return 0xFF;
  BYTE Button=ButtonsAcross*(point.y / (GapHeight+ButtonHeight))+(point.x / (GapWidth+ButtonWidth))-FirstDay;
  return Button<Buttons ? Button : 0xFF;
}