implemented about box as temporary gui placeholder

modified CommandLine to start GUI if no command lines options specified
changed local CommandLine instance to member pointer variable
implemented MainWindow about() to display about box
temporarily redefined MainWindow::show() to display about box and quit

commandline.cpp

@@ -50,7 +50,13 @@ CommandLine::CommandLine(const QStringList &args)
 	QStringList options = Tester::options();
 	// append any other options here
 	options.prepend("-h|-?|-v");
-	m_usage = tr("usage: %1 %2").arg(m_programName).arg(options.join("|"));
+	m_usage = tr("usage: %1 [%2]").arg(m_programName).arg(options.join("|"));
+
+	if (args.count() == 1)
+	{
+		// no options, start GUI
+		return;
+	}
 
 	// parse command line arguments
 	if (isVersionOption(args))

mainwindow.cpp

@@ -23,6 +23,8 @@
 //	2012-11-28	initial version
 
 #include <QApplication>
+#include <QMessageBox>
+#include <QTimer>
 
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
@@ -32,12 +34,12 @@ MainWindow::MainWindow(QWidget *parent) :
 	QMainWindow(parent),
 	ui(new Ui::MainWindow)
 {
-	CommandLine commandLine(qApp->arguments());
-	if (commandLine.processed())
+	m_commandLine = new CommandLine(qApp->arguments());
+	if (m_commandLine->processed())
 	{
 		// don't start GUI and retrieve the return code
 		m_guiActive = false;
-		m_returnCode = commandLine.returnCode();
+		m_returnCode = m_commandLine->returnCode();
 		return;
 	}
 
@@ -47,9 +49,38 @@ MainWindow::MainWindow(QWidget *parent) :
 }
 
 
+void MainWindow::show(void)
+{
+	about();
+	QTimer::singleShot(0, qApp, SLOT(quit()));
+}
+
+
+void MainWindow::about(void)
+{
+	// build up about box string
+	QString aboutString(tr("<h2>Interactive BASIC Compiler Project</h2>"));
+
+	const char **gpl = m_commandLine->gplStatement();
+	// add version and copyright year to first string
+	aboutString.append(tr(gpl[0]).arg(tr("Version %1")
+		.arg(m_commandLine->version())).arg(m_commandLine->copyrightYear())
+		.append("<br>"));
+	for (int i = 1; gpl[i]; i++)
+	{
+		aboutString.append("<br>").append(tr(gpl[i]));
+	}
+	aboutString.append(tr("<p><i>Temporary GUI Placeholder</i>"));
+	aboutString.append(tr("<p>Command line %1").arg(m_commandLine->usage()));
+
+	QMessageBox::about(this, tr("About IBCP"), aboutString);
+}
+
+
 MainWindow::~MainWindow()
 {
 	delete ui;
+	delete m_commandLine;
 }
 
 

mainwindow.h

@@ -31,6 +31,8 @@ namespace Ui {
 class MainWindow;
 }
 
+class CommandLine;
+
 class MainWindow : public QMainWindow
 {
 	Q_OBJECT
@@ -47,10 +49,16 @@ class MainWindow : public QMainWindow
 		return m_returnCode;
 	}
 
+public slots:
+	void show(void);
+
 private:
+	void about(void);
+
 	Ui::MainWindow *ui;
 	bool m_guiActive;
 	int m_returnCode;
+	CommandLine *m_commandLine;
 };
 
 #endif // MAINWINDOW_H