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[提问]获取共享打印机的状态 [复制链接]

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离线殷bing
新手上路
 
只看楼主 倒序阅读 楼主  发表于: 2013-10-10
— 本帖被 XChinux 从 Qt 作品展 移动到本区(2013-10-11) —
关键词： 共享
rt，使用API接口的话，也是获取的本地的打印机状态，而且用QPrinter的printstate获取的也是本地的打印机状态，那么怎样获取共享打印机的状态呢？
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离线殷bing
新手上路
只看该作者 1楼 发表于: 2013-10-10
Q
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  1. QPrinterInfo Info( q_printer );
  3.     QString printerName = Info.printerName();
  5.     //打印机句柄
  6.     HANDLE hPrinter;
  8.     LPSTR szPrinterName;
  10.     //作业信息
  11.     JOB_INFO_2 *pJobs;
  13.     //作业
  14.     int cJobs;
  16.     //打印机状态
  17.     DWORD dwPrinterStatus;
  19.     szPrinterName = (char*)printerName.toLocal8Bit().data();
  21.     OpenPrinterA( szPrinterName, &hPrinter, NULL);
  23.     //获取打印作业的状态
  24.     GetJobs( hPrinter, &pJobs, &cJobs, &dwPrinterStatus );
  26.     //判断打印机是否正常运行，如果为false，则输出为PDF文档
  27.     if( 0 != dwPrinterStatus )
  28.     {
  29.         QWidget w;
  31.         int i_button = QMessageBox::information( &w, "warning", " can not connect printer, whether save to PDF?",
  32.                                           QMessageBox::Yes | QMessageBox::No );
  34.         if( QMessageBox::Yes == i_button )
  35.         {
  36.             PrintToPDF( &q_printer );
  37.         }
  38.     }
  40.     //运行正常，则直接打印
  41.     else
  42.     {
  43.         if( dialog.exec() )
  44.         {
  45.             QPainter q_painter( &q_printer );
  47.             render( &q_painter);
  48.         }
  49.     }
  50. }
  52. /// 获取打印作业的状态
  53. BOOL CScene::GetJobs(HANDLE hPrinter, JOB_INFO_2 **ppJobInfo, int *pcJobs, DWORD *pStatus)
  54. {
  55. DWORD       cByteNeeded, nReturned, cByteUsed;
  57. JOB_INFO_2          *pJobStorage = NULL;
  59. PRINTER_INFO_2       *pPrinterInfo = NULL;
  61. if ( !GetPrinter(hPrinter, 2, NULL, 0, &cByteNeeded ) )
  62. {
  63.   DWORD dwErrorCode = ::GetLastError();
  65.   if ( dwErrorCode != ERROR_INSUFFICIENT_BUFFER )
  66.       return FALSE;
  67. }
  69. pPrinterInfo = (PRINTER_INFO_2 *)malloc(cByteNeeded);
  71. if (!(pPrinterInfo))
  72.     return FALSE;
  75. if (!GetPrinter(hPrinter, 2, (LPBYTE)pPrinterInfo, cByteNeeded, &cByteUsed))
  76. {
  77.       free(pPrinterInfo);
  79.       pPrinterInfo = NULL;
  81.       return FALSE;
  82. }
  85. if (!EnumJobs(hPrinter, 0, pPrinterInfo->cJobs, 2, NULL, 0, (LPDWORD)&cByteNeeded,
  86.   (LPDWORD)&nReturned))
  87. {
  88.       if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
  89.       {
  90.            free(pPrinterInfo);
  91.            pPrinterInfo = NULL;
  92.            return FALSE;
  93.       }
  94. }
  96. pJobStorage = (JOB_INFO_2 *)malloc(cByteNeeded);
  98. if (!pJobStorage)
  99. {
  100.       free(pPrinterInfo);
  102.       pPrinterInfo = NULL;
  104.       return FALSE;
  105. }
  107. ZeroMemory(pJobStorage, cByteNeeded);
  110. if (!EnumJobs(hPrinter, 0, pPrinterInfo->cJobs, 2, (LPBYTE)pJobStorage, cByteNeeded,
  111.   (LPDWORD)&cByteUsed, (LPDWORD)&nReturned))
  112. {
  113.       free(pPrinterInfo);
  115.       free(pJobStorage);
  117.       pJobStorage = NULL;
  119.       pPrinterInfo = NULL;
  121.       return FALSE;
  122. }
  124. *pcJobs = nReturned;
  126. *pStatus = pPrinterInfo->Status;
  128. *ppJobInfo = pJobStorage;
  130. free(pPrinterInfo);
  132. return TRUE;
  134. }
  136. //打印成PDF文档
  137. void CScene::PrintToPDF( QPrinter *printer)
  138. {
  139.     //打印为PDF文档输出
  140.     printer->setOutputFormat( QPrinter::PdfFormat );
  142.     QWidget w;
  144.     QString path = QFileDialog::getSaveFileName( &w, "save as", "", "*.pdf");
  146.     if( path.isEmpty() )
  147.     {
  148.         return ;
  149.     }
  151.     QFileInfo fileinfo( path );
  153.     printer->setOutputFileName( fileinfo.fileName() );
  155.     QPainter q_painter( printer );
  157.     render( &q_painter );
  158. }
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