Sessions: introduce SessionView

This will replace the simple session list in
SessionManager UI.

Change-Id: Idec2fa2e4629b9986a5d274d6da5129e779e2100
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/projectexplorer/sessionview.cpp

@@ -0,0 +1,134 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "sessionview.h"
+
+#include "session.h"
+
+#include <QItemSelection>
+#include <QStyledItemDelegate>
+#include <QHeaderView>
+
+namespace ProjectExplorer {
+namespace Internal {
+
+// custom item delegate class
+class RemoveItemFocusDelegate : public QStyledItemDelegate
+{
+public:
+    RemoveItemFocusDelegate(QObject *parent = nullptr) : QStyledItemDelegate(parent) {
+    }
+
+protected:
+    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;
+};
+
+void RemoveItemFocusDelegate::paint(QPainter* painter, const QStyleOptionViewItem & option, const QModelIndex &index) const
+{
+    QStyleOptionViewItem opt = option;
+    opt.state &= ~QStyle::State_HasFocus;
+    QStyledItemDelegate::paint(painter, opt, index);
+}
+
+SessionView::SessionView(QWidget *parent)
+    : QTreeView(parent)
+{
+    setItemDelegate(new RemoveItemFocusDelegate(this));
+    setSelectionBehavior(QAbstractItemView::SelectRows);
+    setSelectionMode(QAbstractItemView::SingleSelection);
+    setWordWrap(false);
+    setRootIsDecorated(false);
+
+    setModel(&m_sessionModel);
+
+    QItemSelection firstRow(m_sessionModel.index(0,0), m_sessionModel.index(0, 0));
+    selectionModel()->select(firstRow,
+        QItemSelectionModel::QItemSelectionModel::SelectCurrent);
+
+    connect(this, &QTreeView::activated, [this](const QModelIndex &index){
+        emit activated(m_sessionModel.sessionAt(index.row()));
+    });
+    connect(selectionModel(), &QItemSelectionModel::currentRowChanged, [this]
+            (const QModelIndex &index) {
+        emit selected(m_sessionModel.sessionAt(index.row()));
+    });
+    connect(&m_sessionModel, &SessionModel::sessionSwitched,
+        this, &SessionView::sessionSwitched);
+
+    connect(&m_sessionModel, &SessionModel::modelReset,
+        this, &SessionView::selectActiveSession);
+ }
+
+void SessionView::createNewSession()
+{
+    m_sessionModel.newSession();
+}
+
+void SessionView::deleteCurrentSession()
+{
+    m_sessionModel.deleteSession(currentSession());
+}
+
+void SessionView::cloneCurrentSession()
+{
+    m_sessionModel.cloneSession(currentSession());
+}
+
+void SessionView::renameCurrentSession()
+{
+    m_sessionModel.renameSession(currentSession());
+}
+
+void SessionView::switchToCurrentSession()
+{
+    m_sessionModel.switchToSession(currentSession());
+}
+
+QString SessionView::currentSession()
+{
+    return m_sessionModel.sessionAt(selectionModel()->currentIndex().row());
+}
+
+SessionModel *SessionView::sessionModel()
+{
+    return &m_sessionModel;
+}
+
+void SessionView::selectActiveSession()
+{
+    int row = m_sessionModel.indexOfSession(SessionManager::activeSession());
+    selectionModel()->setCurrentIndex(model()->index(row, 0),
+        QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
+}
+
+void SessionView::showEvent(QShowEvent *event)
+{
+    QTreeView::showEvent(event);
+    selectActiveSession();
+    setFocus();
+}
+
+} // namespace Internal
+} // namespace ProjectExplorer