Visual Calendar : Visual C++

       The following program is a Calendar in Visual C++. This program has been created in Visual Studio Express 2013 IDE. You can navigate around this Calendar's pages using the buttons.

The screenshots below describe its functionality :

Source Code :

#include <windows.h>

#include <math.h>

#include <tchar.h>

#include "resource.h"

#define ID_TIMER 1

#define TWOPI (2 * 3.14159)

HINSTANCE hInst;

int Left = -700, Top = 700, Width = 210, Height = 210;

long int  _YYYY, _MM, _DD, _tempyy, _tempmm;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)

{

       static TCHAR szAppName[] = TEXT("Visual Calendar");

       HWND hwnd;

       MSG msg;

       WNDCLASS wndclass;

       wndclass.style = CS_HREDRAW | CS_VREDRAW;

       wndclass.lpfnWndProc = WndProc;

       wndclass.cbClsExtra = 0;

       wndclass.cbWndExtra = 0;

       wndclass.hInstance = hInstance;

       wndclass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_CALENDAR));

       wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);

       wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

       wndclass.lpszMenuName = NULL;

       wndclass.lpszClassName = szAppName;

       if (!RegisterClass(&wndclass))

       {

              MessageBox(NULL, TEXT("Window Registration Failed!"),

                     szAppName, MB_ICONERROR);

              return 0;

       }

       hwnd = CreateWindow(szAppName, TEXT("Visual Calendar"),

              WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,

              CW_USEDEFAULT, CW_USEDEFAULT,

              600, 600,

              NULL, NULL, hInstance, NULL);

       ShowWindow(hwnd, iCmdShow);

       UpdateWindow(hwnd);

       while (GetMessage(&msg, NULL, 0, 0))

       {

              TranslateMessage(&msg);

              DispatchMessage(&msg);

       }

       return msg.wParam;

}

/*-------------------------------------------------------------------------------------*/

int _NumberOfDays(int month, int year)

{

       int No_of_days = 0;

       switch (month)

       {

       case 1:

              No_of_days = 31;

              break;

       case 2:

              if (!((year % 4) || !(year % 100) && (year % 400)))

                     No_of_days = 29;

              else

                     No_of_days = 28;

              break;

       case 3:

              No_of_days = 31;

              break;

       case 4:

              No_of_days = 30;

              break;

       case 5:

              No_of_days = 31;

              break;

       case 6:

              No_of_days = 30;

              break;

       case 7:

              No_of_days = 31;

              break;

       case 8:

              No_of_days = 31;

              break;

       case 9:

              No_of_days = 30;

              break;

       case 10:

              No_of_days = 31;

              break;

       case 11:

              No_of_days = 30;

              break;

       case 12:

              No_of_days = 31;

              break;

       }

       return No_of_days;

}

int No_Of_Days()

{

       int d1, m1, y1;

       int d2, m2, y2;

       int D, M, Y;

       int Arr[12];

       int i, count;

       y1 =_YYYY;

       m1 = _MM;

       d1 = 01;

       y2 = 2015;

       m2 = 01;

       d2 = 01;

       if (y1 > y2 || (m1 > m2 && y1 == y2))

       {

              D = d1;

              M = m1;

              Y = y1;

              d1 = d2;

              m1 = m2;

              y1 = y2;

              d2 = D;

              m2 = M;

              y2 = Y;

       }

       count = 0;

       for (i = m1; i < (m2 + (y2 - y1) * 12); i++)

       {

              if (i > 12)

              {

                     i = 1;

                     y1 = y1 + 1;

              }

              Arr[0] = 31;

              if (!((y1 % 4) || !(y1 % 100) && (y1 % 400)))

              {

                     Arr[1] = 29;

              }

              else

              {

                     Arr[1] = 28;

              }

              Arr[2] = 31;

              Arr[3] = 30;

              Arr[4] = 31;

              Arr[5] = 30;

              Arr[6] = 31;

              Arr[7] = 31;

              Arr[8] = 30;

              Arr[9] = 31;

              Arr[10] = 30;

              Arr[11] = 31;

              count = count + (Arr[i - 1]);

       }

       count = count + d2 - d1;

       if (count < 0)

              count = count * -1;

  

       return count;

}

int Name_Of_Day()

{

       /* Assuming in 2015 on first january the day was thrusday. */

       /* Let S-1 M-2 T-3 W-4 T-5 F-6 S-7 */

        

       int _day = 5;

       int total_days = 0;

       total_days = No_Of_Days();

       if (_YYYY >= 2015)

       {

              for (int k = 1; k <= total_days; k++)

              {

                     _day++;

                     if (_day> 7)

                           _day = 1;

              }

       }

       else

       {

              for (int k = 1; k <= total_days; k++)

              {

                     _day--;

                     if (_day< 1)

                           _day = 7;

              }

       }

       return _day;

}

void WriteDays(HDC hdc, int left, int top)

{

       HFONT hfont;

       LOGFONT f = { 0 };

       HGDIOBJ holdfont;

       static HBRUSH hBrush;

       int No_of_days;

       int _left = left, _top = top;

       int _col = 0;

       int _i;

       hBrush = CreateSolidBrush(RGB(0,255,255));

      

       f.lfHeight = 110; /* font height */

       hfont = CreateFontIndirect(&f);

       holdfont = SelectObject(hdc, hfont);

       SetTextColor(hdc, RGB(0, 0, 0));

       SetBkMode(hdc, TRANSPARENT);

       No_of_days = _NumberOfDays((int)_MM, (int)_YYYY);

       left = left + (Name_Of_Day() - 1) * 200;

       for (int i = 0; i< No_of_days; i++)

       {

              if (left >= _left + 7*200)

              {

                     left = _left;

                     top -= 200;

              }

              /*****************************/

              if (_YYYY == _tempyy && _MM == _tempmm && _DD == i + 1)

              {

                     SelectObject(hdc, hBrush);

                     Ellipse(hdc, left-25, top+20, left+125, top-125);

                     _col = 1;

              }

              /*****************************/

              if (_col == 1)

              {

                     SetTextColor(hdc, RGB(255, 255, 255));

                     _col = 0;

              }

              else if (left == _left)

                     SetTextColor(hdc, RGB(255, 0, 0));

              else

                     SetTextColor(hdc, RGB(0, 0, 0));

              _i = i + 1;

              wchar_t buffer[13];

              _itow_s(_i, buffer, 10);

              TextOut(hdc, left, top, buffer, 2);

              left += 200;

       }

}

void Draw(HDC hdc)

{

       HFONT hfont;

       LOGFONT f = { 0 };

       HGDIOBJ holdfont;

       int left = Left, top = Top;

      

       int _left = -400;

       f.lfHeight = 110; /* font height */

       hfont = CreateFontIndirect(&f);

       holdfont = SelectObject(hdc, hfont);

       SetTextColor(hdc, RGB(255, 0, 0));

       SetBkMode(hdc, TRANSPARENT);

       /******************************************/

             

              TextOut(hdc, left+10, top+8, _T("S"), 2);

              left += 200;

              SetTextColor(hdc, RGB(0, 0, 0));

              SetBkMode(hdc, TRANSPARENT);

              TextOut(hdc, left + 10, top + 8, _T("M"), 2);

              left += 200;

              TextOut(hdc, left + 10, top + 8, _T("T"), 2);

              left += 200;

              TextOut(hdc, left + 10, top + 8, _T("W"), 2);

              left += 200;

              TextOut(hdc, left + 10, top + 8, _T("T"), 2);

              left += 200;

              TextOut(hdc, left + 10, top + 8, _T("F"), 2);

              left += 200;

              TextOut(hdc, left + 10, top + 8, _T("S"), 2);

              left += 200;

             

      

       /*******************************************/

              SetTextColor(hdc, RGB(0, 128, 255));

              SetBkMode(hdc, TRANSPARENT);

              switch (_MM)

              {

              case 1:

                     TextOut(hdc, _left, top + 200, _T("January"), 7);

                     break;

              case 2:

                     TextOut(hdc, _left, top + 200, _T("February"), 8);

                     break;

              case 3:

                     TextOut(hdc, _left, top + 200, _T("March"), 5);

                     break;

              case 4:

                     TextOut(hdc, _left, top + 200, _T("April"), 5);

                     break;

              case 5:

                     TextOut(hdc, _left, top + 200, _T("May"), 3);

                     break;

              case 6:

                     TextOut(hdc, _left, top + 200, _T("June"), 4);

                     break;

              case 7:

                     TextOut(hdc, _left, top + 200, _T("July"), 4);

                     break;

              case 8:

                     TextOut(hdc, _left, top + 200, _T("August"), 6);

                     break;

              case 9:

                     TextOut(hdc, _left, top + 200, _T("September"), 9);

                     break;

              case 10:

                     TextOut(hdc, _left, top + 200, _T("October"), 7);

                     break;

              case 11:

                     TextOut(hdc, _left, top + 200, _T("November"), 8);

                     break;

              case 12:

                     TextOut(hdc, _left, top + 200, _T("December"), 8);

                     break;

              }

              wchar_t buffer[13];

              _itow_s(_YYYY, buffer, 10);

              TextOut(hdc, _left+500, top+200, buffer, 4);

}

void Init()

{

      

       static SYSTEMTIME st;

       GetLocalTime(&st);

       _YYYY = st.wYear;

       _MM =  st.wMonth;

       _DD = st.wDay;

       _tempyy = _YYYY;

       _tempmm = _MM;

}

void ClearScreen(HDC hdc)

{

       SelectObject(hdc, GetStockObject(WHITE_PEN));

       Rectangle(hdc, -1000, 1000, 1000, -600);

             

}

void SetIsotropic(HDC hdc, int cxClient, int cyClient)

{

       SetMapMode(hdc, MM_ISOTROPIC);

       SetWindowExtEx(hdc, 1000, 1000, NULL);

       SetViewportExtEx(hdc, cxClient / 2, -cyClient / 2, NULL);

       SetViewportOrgEx(hdc, cxClient / 2, cyClient / 2, NULL);

}

/*-------------------------------------------------------------------------------------*/

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

{

       static int cxClient, cyClient;

       HDC hdc;

       PAINTSTRUCT ps;

       static HWND hBtnMonPlus = NULL, hBtnMonMinus = NULL, hBtnYrPlus = NULL, hBtnYrMinus = NULL, hBtnToday = NULL;

       switch (message)

       {

       case WM_SIZE:

              cxClient = LOWORD(lParam);

              cyClient = HIWORD(lParam);

              return 0;

       case WM_COMMAND:

              hdc = GetDC(hwnd);

              switch (LOWORD(wParam))

              {

              case IDC_BTNMONPLUS:

                     // Month++

                    

                     if (_YYYY < 2070)

                           _MM++;

                     if (_MM>12 && _YYYY < 2070)

                     {

                           _MM = 1;

                           _YYYY++;

                     }

                    

                     break;

              case IDC_BTNMONMINUS:

                     // Month--

                     if (_YYYY>1500)

                           _MM--;

                     if (_MM < 1 && _YYYY > 1500)

                     {

                           _MM = 12;

                           _YYYY--;

                     }

                    

                     break;

              case IDC_BTNYRPLUS:

                     // Year++

                     if (_YYYY < 2070)

                           _YYYY++;

                     break;

              case IDC_BTNYRMINUS:

                     // Year--

                     if (_YYYY > 1500)

                           _YYYY--;

                     break;

              case IDC_BTNTODAY:

                     // Today

                     Init();

                     break;

              }

              ReleaseDC(hwnd, hdc);

              return 0;

       case WM_CREATE:

              hdc = GetDC(hwnd);

              //SetIsotropic(hdc, cxClient, cyClient);

              SetTimer(hwnd, ID_TIMER, 1000, NULL);

              // Month++

              hBtnMonPlus = CreateWindow(TEXT("BUTTON"), TEXT("Month++"),

                     WS_CHILD | WS_VISIBLE |

                     BS_PUSHBUTTON,

                     480, 500, 90, 40,

                     hwnd,

                     (HMENU)IDC_BTNMONPLUS,

                     hInst, NULL);

              // Month--

              hBtnMonPlus = CreateWindow(TEXT("BUTTON"), TEXT("Month- -"),

                     WS_CHILD | WS_VISIBLE |

                     BS_PUSHBUTTON,

                     370, 500, 90, 40,

                     hwnd,

                     (HMENU)IDC_BTNMONMINUS,

                     hInst, NULL);

              // Year++

              hBtnMonPlus = CreateWindow(TEXT("BUTTON"), TEXT("Year++"),

                     WS_CHILD | WS_VISIBLE |

                     BS_PUSHBUTTON,

                     250, 500, 100, 40,

                     hwnd,

                     (HMENU)IDC_BTNYRPLUS,

                     hInst, NULL);

              // Year--

              hBtnMonPlus = CreateWindow(TEXT("BUTTON"), TEXT("Year- -"),

                     WS_CHILD | WS_VISIBLE |

                     BS_PUSHBUTTON,

                     130, 500, 100, 40,

                     hwnd,

                     (HMENU)IDC_BTNYRMINUS,

                     hInst, NULL);

              // Today

              hBtnToday = CreateWindow(TEXT("BUTTON"), TEXT("Today"),

                     WS_CHILD | WS_VISIBLE |

                     BS_PUSHBUTTON,

                     10, 500, 100, 40,

                     hwnd,

                     (HMENU)IDC_BTNTODAY,

                     hInst, NULL);

              ReleaseDC(hwnd, hdc);

              return 0;

       case WM_TIMER:

              hdc = GetDC(hwnd);

              SetIsotropic(hdc, cxClient, cyClient);

              ClearScreen(hdc);

              Draw(hdc);

              WriteDays(hdc, Left, Top - 200);

              ReleaseDC(hwnd, hdc);

              return 0;

       case WM_PAINT:

              hdc = BeginPaint(hwnd, &ps);

              SetIsotropic(hdc, cxClient, cyClient);

             

              Init();

              Draw(hdc);

              WriteDays(hdc, Left, Top-200);

              EndPaint(hwnd, &ps);

              return 0;

       case WM_DESTROY:

              KillTimer(hwnd, ID_TIMER);

              PostQuitMessage(0);

              return 0;

       }

       return DefWindowProc(hwnd, message, wParam, lParam);

}

Downloads :

Click here to view and download the source code of Visual Calendar (1.86 MB).

Click here to download VisualCalendar.exe only (304 KB).