From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/process-example.html | 148 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 doc/html/process-example.html (limited to 'doc/html/process-example.html') diff --git a/doc/html/process-example.html b/doc/html/process-example.html new file mode 100644 index 0000000..4c226f3 --- /dev/null +++ b/doc/html/process-example.html @@ -0,0 +1,148 @@ + + + + + +Starting processes with IO redirection + + + + + + + +

Starting processes with IO redirection

+ + +

This example shows you how to start other processes with Qt and how +IO redirection is done. The example tries to start the uic (a tool +that comes with the Qt Designer) on a certain ui file and displays the +output of the command. +

Implementation (process.cpp): +

/****************************************************************************
+** $Id: qt/process.cpp   3.3.8   edited Jan 11 14:37 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for Qt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qobject.h>
+#include <qprocess.h>
+#include <qvbox.h>
+#include <qtextview.h>
+#include <qpushbutton.h>
+#include <qapplication.h>
+#include <qmessagebox.h>
+
+#include <stdlib.h>
+
+class UicManager : public QVBox
+{
+    Q_OBJECT
+
+public:
+    UicManager();
+    ~UicManager() {}
+
+public slots:
+    void readFromStdout();
+    void scrollToTop();
+
+private:
+    QProcess *proc;
+    QTextView *output;
+    QPushButton *quitButton;
+};
+
+UicManager::UicManager()
+{
+    // Layout
+    output = new QTextView( this );
+    quitButton = new QPushButton( tr("Quit"), this );
+    connect( quitButton, SIGNAL(clicked()),
+            qApp, SLOT(quit()) );
+    resize( 500, 500 );
+
+    // QProcess related code
+    proc = new QProcess( this );
+
+    // Set up the command and arguments.
+    // On the command line you would do:
+    //   uic -tr i18n "small_dialog.ui"
+    proc->addArgument( "uic" );
+    proc->addArgument( "-tr" );
+    proc->addArgument( "i18n" );
+    proc->addArgument( "small_dialog.ui" );
+
+    connect( proc, SIGNAL(readyReadStdout()),
+            this, SLOT(readFromStdout()) );
+    connect( proc, SIGNAL(processExited()),
+            this, SLOT(scrollToTop()) );
+
+    if ( !proc->start() ) {
+        // error handling
+        QMessageBox::critical( 0,
+                tr("Fatal error"),
+                tr("Could not start the uic command."),
+                tr("Quit") );
+        exit( -1 );
+    }
+}
+
+void UicManager::readFromStdout()
+{
+    // Read and process the data.
+    // Bear in mind that the data might be output in chunks.
+    output->append( proc->readStdout() );
+}
+
+void UicManager::scrollToTop()
+{
+    output->setContentsPos( 0, 0 );
+}
+
+int main( int argc, char **argv )
+{
+    QApplication a( argc, argv );
+    UicManager manager;
+    a.setMainWidget( &manager );
+    manager.show();
+    return a.exec();
+}
+
+#include "process.moc"
+

+ +