Add new class VersionedSaveDialog

A file save dialog (inherits FileDialog) that provides buttons to
increment or decrement a version which is appended to the file name.
(e.g. "MyProject-01.mmpz")

include/FileDialog.h

@@ -35,6 +35,8 @@ public:
 	explicit FileDialog( QWidget *parent = 0, const QString &caption = QString(),
 						const QString &directory = QString(),
 						const QString &filter = QString() );
+
+	void clearSelection();
 };
 
 #endif // FILEDIALOG_HPP

include/VersionedSaveDialog.h

@@ -0,0 +1,53 @@
+/*
+ * VersionedSaveDialog.h - declaration of class VersionedSaveDialog, a file save
+ * dialog that provides buttons to increment or decrement a version which is
+ * appended to the file name. (e.g. "MyProject-01.mmpz")
+ *
+ * Copyright (c) 2014 Lukas W <lukaswhl/at/gmail.com>
+ *
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#ifndef VERSIONEDSAVEDIALOG_H
+#define VERSIONEDSAVEDIALOG_H
+
+#include "FileDialog.h"
+
+class QLineEdit;
+
+
+class VersionedSaveDialog : public FileDialog
+{
+	Q_OBJECT
+public:
+	explicit VersionedSaveDialog( QWidget *parent = 0,
+								  const QString &caption = QString(),
+								  const QString &directory = QString(),
+								  const QString &filter = QString() );
+
+	// Returns true if file name was changed, returns false if it wasn't
+	static bool changeFileNameVersion( QString &fileName, bool increment );
+
+public slots:
+	void incrementVersion();
+	void decrementVersion();
+};
+
+#endif // VERSIONEDSAVEDIALOG_H

src/gui/MainWindow.cpp

@@ -62,6 +62,7 @@
 #include "AutomationEditor.h"
 #include "templates.h"
 #include "FileDialog.h"
+#include "VersionedSaveDialog.h"
 
 
 
@@ -748,11 +749,9 @@ bool MainWindow::saveProject( void )
 
 bool MainWindow::saveProjectAs( void )
 {
-	FileDialog sfd( this, tr( "Save project" ), "",
+	VersionedSaveDialog sfd( this, tr( "Save project" ), "",
 			tr( "MultiMedia Project (*.mmp *.mmpz);;"
 				"MultiMedia Project Template (*.mpt)" ) );
-	sfd.setAcceptMode( QFileDialog::AcceptSave );
-	sfd.setFileMode( QFileDialog::AnyFile );
 	QString f = engine::getSong()->projectFileName();
 	if( f != "" )
 	{

src/gui/dialogs/FileDialog.cpp

@@ -26,6 +26,7 @@
 #include <QtCore/QList>
 #include <QtCore/QUrl>
 #include <QtGui/QDesktopServices>
+#include <QtGui/QListView>
 
 #include "FileDialog.h"
 
@@ -53,5 +54,12 @@ FileDialog::FileDialog( QWidget *parent, const QString &caption,
 	setSidebarUrls(urls);
 }
 
+void FileDialog::clearSelection()
+{
+	static QListView *view = findChild<QListView*>();
+	Q_ASSERT( view );
+	view->clearSelection();
+}
+
 
 #include "moc_FileDialog.cxx"

src/gui/dialogs/VersionedSaveDialog.cpp

@@ -0,0 +1,139 @@
+/*
+ * VersionedSaveDialog.cpp - implementation of class VersionedSaveDialog
+ *
+ * Copyright (c) 2014 Lukas W <lukaswhl/at/gmail.com>
+ *
+ * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#include <QtGui/QLayout>
+#include <QtGui/QPushButton>
+#include <QtGui/QFontMetrics>
+#include <QtGui/QLineEdit>
+
+#include "VersionedSaveDialog.h"
+
+
+
+
+VersionedSaveDialog::VersionedSaveDialog( QWidget *parent,
+										  const QString &caption,
+										  const QString &directory,
+										  const QString &filter ) :
+	FileDialog(parent, caption, directory, filter)
+{
+	setAcceptMode( QFileDialog::AcceptSave );
+	setFileMode( QFileDialog::AnyFile );
+
+	// Create + and - buttons
+	QPushButton *plusButton( new QPushButton( "+", this) );
+	plusButton->setToolTip( tr( "Increment version number" ) );
+	QPushButton *minusButton( new QPushButton( "-", this ) );
+	minusButton->setToolTip( tr( "Decrement version number" ) );
+	plusButton->setFixedWidth( plusButton->fontMetrics().width( "+" ) + 30 );
+	minusButton->setFixedWidth( minusButton->fontMetrics().width( "+" ) + 30 );
+
+	// Add buttons to grid layout. For doing this, remove the lineEdit and
+	// replace it with a HBox containing lineEdit and the buttons.
+	QGridLayout *layout = dynamic_cast<QGridLayout*>( this->layout() );
+	QWidget *lineEdit = findChild<QLineEdit*>();
+	layout->removeWidget( lineEdit );
+
+	QHBoxLayout* hLayout( new QHBoxLayout() );
+	hLayout->addWidget( lineEdit );
+	hLayout->addWidget( plusButton );
+	hLayout->addWidget( minusButton );
+	layout->addLayout( hLayout, 2, 1 );
+
+	// Connect + and - buttons
+	connect( plusButton, SIGNAL( clicked() ), this, SLOT( incrementVersion() ));
+	connect( minusButton, SIGNAL( clicked() ), this, SLOT( decrementVersion() ));
+}
+
+
+
+
+bool VersionedSaveDialog::changeFileNameVersion(QString &fileName, bool increment )
+{
+	static QRegExp regexp( "-\\d+(\\.\\w+)?$" );
+
+	int idx = regexp.indexIn( fileName );
+	// For file names without extension (no ".mmpz")
+	int insertIndex = fileName.lastIndexOf( '.' );
+	if ( insertIndex < idx+1 )
+		insertIndex = fileName.size();
+
+	if ( idx == -1 )
+	{
+		// Can't decrement if there is no version number
+		if ( increment == false )
+			return false;
+		else
+			fileName.insert( insertIndex, "-01" );
+	}
+	else
+	{
+		// Find current version number
+		QString number = fileName.mid( idx+1, insertIndex - idx - 1 );
+		bool ok;
+		ushort version = number.toUShort( &ok );
+		Q_ASSERT( ok );
+
+		// Can't decrement 0
+		if ( !increment and version == 0 )
+			return false;
+		// Replace version number
+		version = increment ? version + 1 : version - 1;
+		QString newnumber = QString( "%1" ).arg( version, 2, 10, QChar( '0' ) );
+
+		fileName.replace( idx+1, number.length(), newnumber );
+	}
+	return true;
+}
+
+
+
+
+void VersionedSaveDialog::incrementVersion()
+{
+	const QStringList& selected = selectedFiles();
+	if ( selected.size() != 1 )
+		return;
+	QString file = selected[0];
+	changeFileNameVersion( file, true );
+	clearSelection();
+	selectFile( file );
+}
+
+
+
+
+void VersionedSaveDialog::decrementVersion()
+{
+	const QStringList& selected = selectedFiles();
+	if ( selected.size() != 1 )
+		return;
+	QString file = selected[0];
+	changeFileNameVersion( file, false );
+	clearSelection();
+	selectFile( file );
+}
+
+#include "moc_VersionedSaveDialog.cxx"