modules/rosapps/applications/screensavers/circles/circles.c

   1 /*
   2  *  Copyright 2008 Marc Piulachs (marc.piulachs@codexchange.net)
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  17  */
  18
  19 #include <windows.h>
  20 #include <scrnsave.h>
  21 #include <tchar.h>
  22 #include "resource.h"
  23
  24 #define RANDOM_COLOR (rand () % 256)
  25
  26 #define APPNAME              _T("Circles")
  27 #define APP_TIMER            1
  28 #define APP_TIMER_INTERVAL   100
  29 #define MAX_CIRCLES          50
  30
  31 int circlesCount;
  32 int width, x, y;
  33
  34 LRESULT WINAPI ScreenSaverProc (HWND hwnd, UINT iMsg, WPARAM wparam, LPARAM lparam)
  35 {
  36     HDC hdc;
  37     RECT rect;
  38     HBRUSH hbrush, hbrushOld;
  39
  40     switch (iMsg)
  41     {
  42         case WM_CREATE:
  43             SetTimer (hwnd, APP_TIMER, APP_TIMER_INTERVAL, NULL);
  44             break;
  45
  46         case WM_DESTROY:
  47             KillTimer (hwnd, APP_TIMER);
  48             PostQuitMessage (0);
  49             return 0;
  50
  51         case WM_TIMER:
  52             hdc = GetDC (hwnd);
  53             GetClientRect (hwnd, &rect);
  54             hbrush = CreateSolidBrush (RGB (RANDOM_COLOR, RANDOM_COLOR, RANDOM_COLOR));
  55             hbrushOld = SelectObject (hdc, hbrush);
  56
  57             x = rand () % rect.right;
  58             y = rand () % rect.bottom;
  59
  60             /* the circle will be 10% of total screen */
  61             width = rect.right / 10;
  62             if (rect.bottom / 10 < width)
  63                 width = rect.bottom / 10;
  64
  65             /* Draw circle on screen */
  66             Ellipse (
  67                 hdc,
  68                 x,
  69                 y,
  70                 x + width,
  71                 y + width);
  72
  73             //Track the number of painted circles on scren
  74             circlesCount++;
  75             if (circlesCount == MAX_CIRCLES)
  76             {
  77                 InvalidateRect (hwnd, NULL, TRUE);
  78                 circlesCount = 0;
  79             }
  80
  81             SelectObject (hdc, hbrushOld);
  82             DeleteObject (hbrush);
  83             ReleaseDC (hwnd, hdc);
  84
  85             return 0;
  86     }
  87
  88     return DefScreenSaverProc (hwnd, iMsg, wparam, lparam);
  89 }
  90
  91
  92 BOOL WINAPI ScreenSaverConfigureDialog(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
  93 {
  94     return FALSE;
  95 }
  96
  97 // This function is only called one time before opening the configuration dialog.
  98 // Use it to show a message that no configuration is necesssary and return FALSE to indicate that no configuration dialog shall be opened.
  99 BOOL WINAPI RegisterDialogClasses(HANDLE hInst)
 100 {
 101     TCHAR szMessage[256];
 102     TCHAR szTitle[25];
 103
 104     LoadString(hInst, IDS_TEXT, szMessage, sizeof(szMessage) / sizeof(TCHAR));
 105     LoadString(hInst, IDS_DESCRIPTION, szTitle, sizeof(szTitle) / sizeof(TCHAR));
 106
 107     MessageBox(NULL, szMessage, szTitle, MB_OK | MB_ICONEXCLAMATION);
 108
 109     return FALSE;
 110 }