programs/taskmgr/trayicon.c

   1 /*
   2  *  ReactOS Task Manager
   3  *
   4  *  trayicon.c
   5  *
   6  *  Copyright (C) 1999 - 2001  Brian Palmer  <brianp@reactos.org>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #define WIN32_LEAN_AND_MEAN    /* Exclude rarely-used stuff from Windows headers */
  24 #include <windows.h>
  25 #include <commctrl.h>
  26 #include <stdlib.h>
  27 #include <malloc.h>
  28 #include <memory.h>
  29 #include <tchar.h>
  30 #include <stdio.h>
  31 #include <winnt.h>
  32
  33 #include "taskmgr.h"
  34 #include "perfdata.h"
  35 #include "shellapi.h"
  36
  37 HICON TrayIcon_GetProcessorUsageIcon(void)
  38 {
  39     HICON        hTrayIcon = NULL;
  40     HDC            hScreenDC = NULL;
  41     HDC            hDC = NULL;
  42     HBITMAP        hBitmap = NULL;
  43     HBITMAP        hOldBitmap;
  44     HBITMAP        hBitmapMask = NULL;
  45     ICONINFO    iconInfo;
  46     ULONG        ProcessorUsage;
  47     int            nLinesToDraw;
  48     HBRUSH        hBitmapBrush = NULL;
  49     RECT        rc;
  50
  51     /*
  52      * Get a handle to the screen DC
  53      */
  54     hScreenDC = GetDC(NULL);
  55     if (!hScreenDC)
  56         goto done;
  57
  58     /*
  59      * Create our own DC from it
  60      */
  61     hDC = CreateCompatibleDC(hScreenDC);
  62     if (!hDC)
  63         goto done;
  64
  65     /*
  66      * Load the bitmaps
  67      */
  68     hBitmap = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_TRAYICON));
  69     hBitmapMask = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_TRAYMASK));
  70     if (!hBitmap || !hBitmapMask)
  71         goto done;
  72
  73     hBitmapBrush = CreateSolidBrush(RGB(0, 255, 0));
  74     if (!hBitmapBrush)
  75         goto done;
  76
  77     /*
  78      * Select the bitmap into our device context
  79      * so we can draw on it.
  80      */
  81     hOldBitmap = (HBITMAP) SelectObject(hDC, hBitmap);
  82
  83     /*
  84      * Get the cpu usage
  85      */
  86     ProcessorUsage = PerfDataGetProcessorUsage();
  87
  88     /*
  89      * Calculate how many lines to draw
  90      * since we have 11 rows of space
  91      * to draw the cpu usage instead of
  92      * just having 10.
  93      */
  94     nLinesToDraw = (ProcessorUsage + (ProcessorUsage / 10)) / 11;
  95     rc.left = 3;
  96     rc.top = 12 - nLinesToDraw;
  97     rc.right = 13;
  98     rc.bottom = 13;
  99
 100     /*
 101      * Now draw the cpu usage
 102      */
 103     if (nLinesToDraw)
 104         FillRect(hDC, &rc, hBitmapBrush);
 105
 106     /*
 107      * Now that we are done drawing put the
 108      * old bitmap back.
 109      */
 110     SelectObject(hDC, hOldBitmap);
 111
 112     iconInfo.fIcon = TRUE;
 113     iconInfo.xHotspot = 0;
 114     iconInfo.yHotspot = 0;
 115     iconInfo.hbmMask = hBitmapMask;
 116     iconInfo.hbmColor = hBitmap;
 117
 118     hTrayIcon = CreateIconIndirect(&iconInfo);
 119
 120 done:
 121     /*
 122      * Cleanup
 123      */
 124     if (hScreenDC)
 125         ReleaseDC(NULL, hScreenDC);
 126     if (hDC)
 127         DeleteDC(hDC);
 128     if (hBitmapBrush)
 129         DeleteObject(hBitmapBrush);
 130     if (hBitmap)
 131         DeleteObject(hBitmap);
 132     if (hBitmapMask)
 133         DeleteObject(hBitmapMask);
 134
 135     /*
 136      * Return the newly created tray icon (if successful)
 137      */
 138     return hTrayIcon;
 139 }
 140
 141 BOOL TrayIcon_ShellAddTrayIcon(void)
 142 {
 143     NOTIFYICONDATA    nid;
 144     HICON            hIcon = NULL;
 145     BOOL            bRetVal;
 146
 147     memset(&nid, 0, sizeof(NOTIFYICONDATA));
 148
 149     hIcon = TrayIcon_GetProcessorUsageIcon();
 150
 151     nid.cbSize = sizeof(NOTIFYICONDATA);
 152     nid.hWnd = hMainWnd;
 153     nid.uID = 0;
 154     nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
 155     nid.uCallbackMessage = WM_ONTRAYICON;
 156     nid.hIcon = hIcon;
 157     wsprintf(nid.szTip, _T("CPU Usage: %d%%"), PerfDataGetProcessorUsage());
 158
 159     bRetVal = Shell_NotifyIcon(NIM_ADD, &nid);
 160
 161     if (hIcon)
 162         DestroyIcon(hIcon);
 163
 164     return bRetVal;
 165 }
 166
 167 BOOL TrayIcon_ShellRemoveTrayIcon(void)
 168 {
 169     NOTIFYICONDATA    nid;
 170     BOOL            bRetVal;
 171
 172     memset(&nid, 0, sizeof(NOTIFYICONDATA));
 173
 174     nid.cbSize = sizeof(NOTIFYICONDATA);
 175     nid.hWnd = hMainWnd;
 176     nid.uID = 0;
 177     nid.uFlags = 0;
 178     nid.uCallbackMessage = WM_ONTRAYICON;
 179
 180     bRetVal = Shell_NotifyIcon(NIM_DELETE, &nid);
 181
 182     return bRetVal;
 183 }
 184
 185 BOOL TrayIcon_ShellUpdateTrayIcon(void)
 186 {
 187     NOTIFYICONDATA    nid;
 188     HICON            hIcon = NULL;
 189     BOOL            bRetVal;
 190
 191     memset(&nid, 0, sizeof(NOTIFYICONDATA));
 192
 193     hIcon = TrayIcon_GetProcessorUsageIcon();
 194
 195     nid.cbSize = sizeof(NOTIFYICONDATA);
 196     nid.hWnd = hMainWnd;
 197     nid.uID = 0;
 198     nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
 199     nid.uCallbackMessage = WM_ONTRAYICON;
 200     nid.hIcon = hIcon;
 201     wsprintf(nid.szTip, _T("CPU Usage: %d%%"), PerfDataGetProcessorUsage());
 202
 203     bRetVal = Shell_NotifyIcon(NIM_MODIFY, &nid);
 204
 205     if (hIcon)
 206         DestroyIcon(hIcon);
 207
 208     return bRetVal;
 209 }