Qt: first attempt at a QMenuView

modules/gui/qt4/Modules.am

@@ -70,6 +70,7 @@ nodist_SOURCES_qt4 = \
 		util/timetooltip.moc.cpp \
 		util/customwidgets.moc.cpp \
 		util/searchlineedit.moc.cpp \
+		util/qmenuview.moc.cpp \
 		util/qvlcapp.moc.cpp \
 		util/pictureflow.moc.cpp \
 		util/buttons/RoundButton.moc.cpp \
@@ -309,6 +310,7 @@ SOURCES_qt4 = 	qt4.cpp \
 		util/customwidgets.cpp \
 		util/searchlineedit.cpp \
 		util/registry.cpp \
+		util/qmenuview.cpp \
 		util/qt_dirs.cpp \
 		util/pictureflow.cpp \
 		util/buttons/BrowseButton.cpp \
@@ -389,6 +391,7 @@ noinst_HEADERS = \
 	util/searchlineedit.hpp \
 	util/qvlcframe.hpp \
 	util/qvlcapp.hpp \
+	util/qmenuview.hpp \
 	util/qt_dirs.hpp \
 	util/registry.hpp \
 	util/pictureflow.hpp \

modules/gui/qt4/util/qmenuview.cpp

+/*****************************************************************************
+ * QMenuView
+ ****************************************************************************
+ * Copyright © 2011 VLC authors and VideoLAN
+ * $Id$
+ *
+ * Authors: Jean-Baptiste Kempf <jb@videolan.org>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#include "qt4.hpp"
+#include "util/qmenuview.hpp"
+
+#include "components/playlist/vlc_model.hpp" /* data( IsCurrentRole ) */
+
+#include <QFont>
+#include <QVariant>
+#include <assert.h>
+
+
+/***
+ * This is a simple view, like a QListView, but displayed as a QMenu
+ * So far, this is quite limited.
+ *
+ * This is now linked to VLC's models. It should be splittable in the future.
+ *
+ * TODO: - limit the number of the menu, as a Q_PROPERTY
+ *       - limit the width of the entries
+ *       - deal with a root item
+ ***/
+
+Q_DECLARE_METATYPE(QModelIndex); // So we can store it in a QVariant
+
+QMenuView::QMenuView( QWidget * parent )
+          : QMenu( parent )
+{
+    m_model = NULL;
+
+    /* Rebuild the Menu just before showing it */
+    CONNECT( this, aboutToShow(), this, rebuild() );
+
+    /* */
+    CONNECT( this, triggered(QAction*), this, activate(QAction*) );
+}
+
+/* */
+void QMenuView::rebuild()
+{
+    if( !m_model )
+        return;
+
+    /* Clear all Items */
+    clear();
+
+    /* Rebuild from root */
+    build( QModelIndex() );
+}
+
+/* */
+void QMenuView::build( const QModelIndex &parent )
+{
+    for( int i = 0; i < m_model->rowCount( parent ); i++ )
+    {
+        QModelIndex idx = m_model->index(i, 0, parent);
+        if( m_model->hasChildren( idx ) )
+        {
+            build( idx );
+        }
+        else
+        {
+            addAction( createActionFromIndex( idx ) );
+        }
+    }
+}
+
+/* Create individual actions */
+QAction* QMenuView::createActionFromIndex( QModelIndex index )
+{
+    QIcon icon = qvariant_cast<QIcon>( index.data( Qt::DecorationRole ) );
+    QAction * action = new QAction( icon, index.data().toString(), this );
+
+    /* Display in bold the active element */
+    if( index.data( VLCModel::IsCurrentRole ).toBool() )
+    {
+        QFont font; font.setBold ( true );
+        action->setFont( font );
+    }
+
+    /* Some items could be hypothetically disabled */
+    action->setEnabled( index.flags().testFlag( Qt::ItemIsEnabled ) );
+
+    /* */
+    QVariant variant; variant.setValue( index );
+    action->setData( variant );
+
+    return action;
+}
+
+/* QMenu action trigger */
+void QMenuView::activate( QAction* action )
+{
+    assert( m_model );
+
+    QVariant variant = action->data();
+    if( variant.canConvert<QModelIndex>() )
+    {
+        emit activated( variant.value<QModelIndex>());
+    }
+}
+

modules/gui/qt4/util/qmenuview.hpp

+/*****************************************************************************
+ * QMenuView
+ ****************************************************************************
+ * Copyright © 2011 VLC authors and VideoLAN
+ * $Id$
+ *
+ * Authors: Jean-Baptiste Kempf <jb@videolan.org>
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef _QMENU_VIEW_H_
+#define _QMENU_VIEW_H_
+
+#include <QMenu>
+#include <QAbstractItemModel>
+
+class QMenuView : public QMenu
+{
+    Q_OBJECT;
+
+public:
+    QMenuView( QWidget * parent = 0 );
+    virtual ~QMenuView(){}
+
+    /* Model */
+    void setModel( QAbstractItemModel * model ) { m_model = model; }
+    QAbstractItemModel * model() const { return m_model; }
+
+private:
+    QAbstractItemModel *m_model;
+
+    QAction *createActionFromIndex( QModelIndex index );
+
+    void build( const QModelIndex &parent );
+
+private slots:
+    void rebuild();
+    void activate(QAction*);
+
+signals:
+    void activated( const QModelIndex & index );
+};
+
+#endif