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 <memory.h>
  28 #include <stdio.h>
  29 #include <winnt.h>
  30 #include <shellapi.h>
  31
  32 #include "wine/unicode.h"
  33 #include "taskmgr.h"
  34 #include "perfdata.h"
  35
  36 static HICON TrayIcon_GetProcessorUsageIcon(void)
  37 {
  38     HICON        hTrayIcon = NULL;
  39     HDC            hScreenDC = NULL;
  40     HDC            hDC = NULL;
  41     HBITMAP        hBitmap = NULL;
  42     HBITMAP        hOldBitmap;
  43     HBITMAP        hBitmapMask = NULL;
  44     ICONINFO    iconInfo;
  45     ULONG        ProcessorUsage;
  46     int            nLinesToDraw;
  47     HBRUSH        hBitmapBrush = NULL;
  48     RECT        rc;
  49
  50     /*
  51      * Get a handle to the screen DC
  52      */
  53     hScreenDC = GetDC(NULL);
  54     if (!hScreenDC)
  55         goto done;
  56
  57     /*
  58      * Create our own DC from it
  59      */
  60     hDC = CreateCompatibleDC(hScreenDC);
  61     if (!hDC)
  62         goto done;
  63
  64     /*
  65      * Load the bitmaps
  66      */
  67     hBitmap = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_TRAYICON));
  68     hBitmapMask = LoadBitmap(hInst, MAKEINTRESOURCE(IDB_TRAYMASK));
  69     if (!hBitmap || !hBitmapMask)
  70         goto done;
  71
  72     hBitmapBrush = CreateSolidBrush(RGB(0, 255, 0));
  73     if (!hBitmapBrush)
  74         goto done;
  75
  76     /*
  77      * Select the bitmap into our device context
  78      * so we can draw on it.
  79      */
  80     hOldBitmap = SelectObject(hDC, hBitmap);
  81
  82     /*
  83      * Get the cpu usage
  84      */
  85     ProcessorUsage = PerfDataGetProcessorUsage();
  86
  87     /*
  88      * Calculate how many lines to draw
  89      * since we have 11 rows of space
  90      * to draw the cpu usage instead of
  91      * just having 10.
  92      */
  93     nLinesToDraw = (ProcessorUsage + (ProcessorUsage / 10)) / 11;
  94     rc.left = 3;
  95     rc.top = 12 - nLinesToDraw;
  96     rc.right = 13;
  97     rc.bottom = 13;
  98
  99     /*
 100      * Now draw the cpu usage
 101      */
 102     if (nLinesToDraw)
 103         FillRect(hDC, &rc, hBitmapBrush);
 104
 105     /*
 106      * Now that we are done drawing put the
 107      * old bitmap back.
 108      */
 109     SelectObject(hDC, hOldBitmap);
 110
 111     iconInfo.fIcon = TRUE;
 112     iconInfo.xHotspot = 0;
 113     iconInfo.yHotspot = 0;
 114     iconInfo.hbmMask = hBitmapMask;
 115     iconInfo.hbmColor = hBitmap;
 116
 117     hTrayIcon = CreateIconIndirect(&iconInfo);
 118
 119 done:
 120     /*
 121      * Cleanup
 122      */
 123     if (hScreenDC)
 124         ReleaseDC(NULL, hScreenDC);
 125     if (hDC)
 126         DeleteDC(hDC);
 127     if (hBitmapBrush)
 128         DeleteObject(hBitmapBrush);
 129     if (hBitmap)
 130         DeleteObject(hBitmap);
 131     if (hBitmapMask)
 132         DeleteObject(hBitmapMask);
 133
 134     /*
 135      * Return the newly created tray icon (if successful)
 136      */
 137     return hTrayIcon;
 138 }
 139
 140 BOOL TrayIcon_ShellAddTrayIcon(void)
 141 {
 142     NOTIFYICONDATAW    nid;
 143     HICON            hIcon = NULL;
 144     BOOL            bRetVal;
 145     WCHAR           wszCPU_Usage[255];
 146
 147     LoadStringW(hInst, IDS_STATUS_BAR_CPU_USAGE, wszCPU_Usage, sizeof(wszCPU_Usage)/sizeof(WCHAR));
 148
 149     memset(&nid, 0, sizeof(NOTIFYICONDATAW));
 150
 151     hIcon = TrayIcon_GetProcessorUsageIcon();
 152
 153     nid.cbSize = sizeof(NOTIFYICONDATAW);
 154     nid.hWnd = hMainWnd;
 155     nid.uID = 0;
 156     nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
 157     nid.uCallbackMessage = WM_ONTRAYICON;
 158     nid.hIcon = hIcon;
 159     wsprintfW(nid.szTip, wszCPU_Usage, PerfDataGetProcessorUsage());
 160
 161     bRetVal = Shell_NotifyIconW(NIM_ADD, &nid);
 162
 163     if (hIcon)
 164         DestroyIcon(hIcon);
 165
 166     return bRetVal;
 167 }
 168
 169 BOOL TrayIcon_ShellRemoveTrayIcon(void)
 170 {
 171     NOTIFYICONDATAW    nid;
 172     BOOL            bRetVal;
 173
 174     memset(&nid, 0, sizeof(NOTIFYICONDATAW));
 175
 176     nid.cbSize = sizeof(NOTIFYICONDATAW);
 177     nid.hWnd = hMainWnd;
 178     nid.uID = 0;
 179     nid.uFlags = 0;
 180     nid.uCallbackMessage = WM_ONTRAYICON;
 181
 182     bRetVal = Shell_NotifyIconW(NIM_DELETE, &nid);
 183
 184     return bRetVal;
 185 }
 186
 187 BOOL TrayIcon_ShellUpdateTrayIcon(void)
 188 {
 189     NOTIFYICONDATAW    nid;
 190     HICON            hIcon = NULL;
 191     BOOL            bRetVal;
 192     WCHAR           wszCPU_Usage[255];
 193
 194     LoadStringW(hInst, IDS_STATUS_BAR_CPU_USAGE, wszCPU_Usage, sizeof(wszCPU_Usage)/sizeof(WCHAR));
 195
 196     memset(&nid, 0, sizeof(NOTIFYICONDATAW));
 197
 198     hIcon = TrayIcon_GetProcessorUsageIcon();
 199
 200     nid.cbSize = sizeof(NOTIFYICONDATAW);
 201     nid.hWnd = hMainWnd;
 202     nid.uID = 0;
 203     nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
 204     nid.uCallbackMessage = WM_ONTRAYICON;
 205     nid.hIcon = hIcon;
 206     wsprintfW(nid.szTip, wszCPU_Usage, PerfDataGetProcessorUsage());
 207
 208     bRetVal = Shell_NotifyIconW(NIM_MODIFY, &nid);
 209
 210     if (hIcon)
 211         DestroyIcon(hIcon);
 212
 213     return bRetVal;
 214 }