ServerInfoModel.h

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/*
* This file is part of ArmarX.
*
* ArmarX is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* ArmarX 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, see <http://www.gnu.org/licenses/>.
*
* @package    ArmarX::
* @author     Manfred Kroehnert ( manfred.kroehnert at kit dot edu)
* @date       2013
* @copyright  http://www.gnu.org/licenses/gpl-2.0.txt
*             GNU General Public License
*/
 
#pragma once
 
#include <QAbstractTableModel>
#include <QBrush>
 
#include <IceGrid/Admin.h>
 
class ServerInfoModel : public QAbstractTableModel
{
    Q_OBJECT
public:
    ServerInfoModel()
    {
    }
 
    ServerInfoModel(IceGrid::ServerDynamicInfoSeq serverInfo)
    {
        setData(serverInfo);
    }
 
    enum COLUMN_INDEX
    {
        eServerInfo_Enabled = 0,
        eServerInfo_Id,
        eServerInfo_Status,
        eServerInfo_Pid,
    };
 
    int
    rowCount(const QModelIndex& parent = QModelIndex()) const override
    {
        return serverInfo.size();
    }
 
    int
    columnCount(const QModelIndex& parent = QModelIndex()) const override
    {
        return 4;
    }
 
    QVariant
    data(const QModelIndex& index, int role = Qt::DisplayRole) const override
    {
        if (!index.isValid())
        {
            return QVariant();
        }
 
        if (index.row() >= (int)serverInfo.size())
        {
            return QVariant();
        }
 
        if (role == Qt::DisplayRole)
        {
            switch (index.column())
            {
                case eServerInfo_Id:
                    return QString::fromStdString(serverInfo.at(index.row()).id);
                    break;
 
                case eServerInfo_Status:
                {
                    switch (serverInfo.at(index.row()).state)
                    {
                        case IceGrid::Inactive:
                            return QString("Inactive");
                            break;
 
                        case IceGrid::Activating:
                            return QString("Activating");
                            break;
 
                        case IceGrid::ActivationTimedOut:
                            return QString("ActivationTimedOut");
                            break;
 
                        case IceGrid::Active:
                            return QString("Active");
                            break;
 
                        case IceGrid::Deactivating:
                            return QString("Deactivating");
                            break;
 
                        case IceGrid::Destroying:
                            return QString("Destroying");
                            break;
 
                        case IceGrid::Destroyed:
                            return QString("Destroyed");
                            break;
                    }
                    // Unknown / future ServerState: do not fall through into the PID
                    // column (issue #64.12a).
                    return QVariant();
                }
 
                case eServerInfo_Pid:
                    return QString::number(serverInfo.at(index.row()).pid);
                    break;
 
                default:
                    return QVariant();
            }
        }
        else if (role == Qt::CheckStateRole)
        {
            if (index.column() == eServerInfo_Enabled)
            {
                return (serverInfo.at(index.row()).enabled) ? Qt::Checked : Qt::Unchecked;
            }
        }
        else if (role == Qt::BackgroundRole)
        {
            return (serverInfo.at(index.row()).enabled) ? QBrush(Qt::green) : QBrush(Qt::lightGray);
        }
        // No Qt::EditRole: the Enabled column is edited via Qt::CheckStateRole. The old
        // code returned a bool here (a confusion with flags()) - issue #64.12e.
 
        return QVariant();
    }
 
    QVariant
    headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override
    {
        if (role != Qt::DisplayRole)
        {
            return QVariant();
        }
 
        if (orientation == Qt::Horizontal)
        {
            switch (section)
            {
                case eServerInfo_Enabled:
                    return QString("Enabled");
                    break;
 
                case eServerInfo_Id:
                    return QString("ID");
                    break;
 
                case eServerInfo_Status:
                    return QString("Status");
                    break;
 
                case eServerInfo_Pid:
                    return QString("PID");
                    break;
 
                default:
                    return QString("");
                    break;
            }
        }
 
        return QVariant();
    }
 
    Qt::ItemFlags
    flags(const QModelIndex& index) const override
    {
        return (index.column() == eServerInfo_Enabled)
                   ? Qt::ItemFlags(Qt::ItemIsEnabled | Qt::ItemIsUserCheckable)
                   : Qt::ItemFlags(Qt::ItemIsEnabled);
    }
 
    bool
    setData(const QModelIndex& index, const QVariant& value, int role) override
    {
        if ((role != Qt::CheckStateRole) || (index.column() != eServerInfo_Enabled))
        {
            return false;
        }
        if (index.row() < 0 || index.row() >= (int)serverInfo.size())
        {
            // Stale index: .at() would throw std::out_of_range into the Qt event loop
            // (issue #64.12d).
            return false;
        }
 
        serverInfo.at(index.row()).enabled = ((Qt::CheckState)value.toInt() == Qt::Checked);
        emit dataChanged(index, index);
        emit serverInfoChanged(serverInfo.at(index.row()));
        return true;
    }
 
    bool
    setData(IceGrid::ServerDynamicInfoSeq newInfo)
    {
        // Runs on the GUI thread (via IceGridViewer::selectGridNode). No mutex needed,
        // and holding one across endResetModel() risked a re-entrant self-deadlock
        // (issue #64.12b/#64.12c). endResetModel() already notifies the views, so the
        // out-of-range dataChanged() that used to follow it is gone too (#64.13b).
        beginResetModel();
        serverInfo = newInfo;
        endResetModel();
        return true;
    }
 
signals:
    void serverInfoChanged(IceGrid::ServerDynamicInfo serverInfo);
 
protected:
    IceGrid::ServerDynamicInfoSeq serverInfo;
};