serverlistview.cpp

//------------------------------------------------------------------------------
// serverlistview.cpp
//------------------------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301  USA
//
//------------------------------------------------------------------------------
// Copyright (C) 2009 "Zalewa" <zalewapl@gmail.com>
//------------------------------------------------------------------------------

#include "gui/widgets/serverlistview.h"

#include "configuration/doomseekerconfig.h"
#include "gui/models/serverlistcolumn.h"
#include "refresher/refresher.h"
#include <QDebug>
#include <QHeaderView>
#include <QItemDelegate>
#include <QMouseEvent>
#include <QPainter>
#include <QSortFilterProxyModel>
#include <QTextDocument>

class CustomItemDelegate : public QItemDelegate
{
public:
        void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
        {
                // First we're going to check for our new right aligned image
                // option.
                bool rightAligned = false;
                QStyleOptionViewItem opt = option;

                QVariant userRole = index.data(Qt::UserRole);
                if (userRole.isValid() && userRole.type() == QVariant::Int && userRole.toInt() == USERROLE_RIGHTALIGNDECORATION)
                {
                        opt.decorationAlignment = Qt::AlignRight | Qt::AlignVCenter;
                        rightAligned = true;
                }

                // Hide the focus rectangle in picture cells.
                if (ServerListColumns::isPictureColumn(index.column()))
                        opt.state &= ~QStyle::State_HasFocus;

                // Now we draw the table as usual.
                QItemDelegate::paint(painter, opt, index);

                // If the row is selected and we are using the right aligned feature
                // we must now redraw the decoration.  The rectangle that was used
                // in the previous function will cause the image to clip.
                //
                // The only other way I can think of for fixing that problem would
                // be to completely rewrite this class, which I really don't want
                // to do.
                if (rightAligned && (opt.state & QStyle::State_Selected))
                {
                        QVariant decorationRole = index.data(Qt::DecorationRole);
                        if (decorationRole.isValid())
                        {
                                painter->save();
                                painter->setClipRect(opt.rect);

                                QPixmap pixmap = decoration(opt, decorationRole);
                                drawDecoration(painter, opt, opt.rect, pixmap);

                                painter->restore();
                        }
                }
        }

protected:
        void drawDecoration(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect, const QPixmap &pixmap) const override
        {
                if (pixmap.isNull() || !rect.isValid())
                        return;

                if (option.decorationAlignment == (Qt::AlignRight | Qt::AlignVCenter)) // Special handling.
                {
                        QPoint p = QStyle::alignedRect(option.direction, option.decorationAlignment, pixmap.size(), option.rect).topLeft();
                        painter->drawPixmap(p, pixmap);
                }
                else
                        QItemDelegate::drawDecoration(painter, option, rect, pixmap);
        }
};


ServerListView::ServerListView(QWidget *parent) : QTableView(parent)
{
        // Prevent the fat rows problem.
        verticalHeader()->setDefaultSectionSize(fontMetrics().height() + 6);
        verticalHeader()->setSectionResizeMode(QHeaderView::Fixed);
        setShowGrid(gConfig.doomseeker.bDrawGridInServerTable);

        setItemDelegate(new CustomItemDelegate());
}

void ServerListView::mouseReleaseEvent(QMouseEvent *event)
{
        QModelIndex index = indexAt(event->pos());
        switch (event->button())
        {
        case Qt::MidButton:
                if (index.isValid())
                        emit middleMouseClicked(index, event->pos());
                break;

        case Qt::RightButton:
                if (index.isValid())
                        emit rightMouseClicked(index, event->pos());
                break;

        default:
                QTableView::mouseReleaseEvent(event);
                break;
        }
}

void ServerListView::mouseDoubleClickEvent(QMouseEvent *event)
{
        if (event->button() != Qt::LeftButton)
                QTableView::mouseDoubleClickEvent(event);
        else
        {
                QModelIndex index = indexAt(event->pos());
                if (index.isValid())
                        emit leftMouseDoubleClicked(index, event->pos());
        }
}

void ServerListView::setupTableProperties()
{
        setIconSize(QSize(26, 15));
        // Some flags that can't be set from the Designer.
        horizontalHeader()->setSortIndicatorShown(true);
        horizontalHeader()->setHighlightSections(false);

        setMouseTracking(true);

        setupTableColumnWidths();
}

void ServerListView::setupTableColumnWidths()
{
        const ServerListColumn *columns = ServerListColumns::columns;

        // Initialize the defaults.
        for (int colIdx = 0; colIdx < ServerListColumnId::NUM_SERVERLIST_COLUMNS; ++colIdx)
                setColumnWidth(colIdx, columns[colIdx].width);

        // Reload state from config, potentially overriding the defaults.
        QString &headerState = gConfig.doomseeker.serverListColumnState;
        if (!headerState.isEmpty())
                horizontalHeader()->restoreState(QByteArray::fromBase64(headerState.toUtf8()));

        // Enforce certain settings on columns, regardless of the state loaded from the config.
        int smallestWidth = horizontalHeader()->minimumSectionSize();
        for (int colIdx = 0; colIdx < ServerListColumnId::NUM_SERVERLIST_COLUMNS; ++colIdx)
        {
                if (!columns[colIdx].bResizable && columns[colIdx].width < smallestWidth)
                {
                        smallestWidth = columns[colIdx].width;
                        horizontalHeader()->setMinimumSectionSize(smallestWidth);
                }
                QHeaderView::ResizeMode resizeMode = columns[colIdx].bResizable ?
                        QHeaderView::Interactive : QHeaderView::ResizeToContents;
                horizontalHeader()->setSectionResizeMode(colIdx, resizeMode);
        }

        // General settings.
        horizontalHeader()->setSectionsMovable(true);
}