src/selectionmanager.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Peter Penz <peter.penz@gmx.at>                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "selectionmanager.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "selectiontoggle.h"
  24 #include <kdirmodel.h>
  25 #include <kiconeffect.h>
  26
  27 #include <QAbstractButton>
  28 #include <QAbstractItemView>
  29 #include <QAbstractProxyModel>
  30 #include <QModelIndex>
  31 #include <QPainter>
  32 #include <QPaintEvent>
  33 #include <QRect>
  34
  35 SelectionManager::SelectionManager(QAbstractItemView* parent) :
  36     QObject(parent),
  37     m_view(parent),
  38     m_button(0),
  39     m_item()
  40 {
  41     connect(parent, SIGNAL(entered(const QModelIndex&)),
  42             this, SLOT(slotEntered(const QModelIndex&)));
  43     connect(parent, SIGNAL(viewportEntered()),
  44             this, SLOT(slotViewportEntered()));
  45     m_button = new SelectionToggle(m_view->viewport());
  46     m_button->setCheckable(true);
  47     m_button->hide();
  48     connect(m_button, SIGNAL(clicked(bool)),
  49             this, SLOT(setItemSelected(bool)));
  50 }
  51
  52 SelectionManager::~SelectionManager()
  53 {
  54 }
  55
  56 void SelectionManager::reset()
  57 {
  58     m_button->hide();
  59     m_item = KFileItem();
  60 }
  61
  62 void SelectionManager::slotEntered(const QModelIndex& index)
  63 {
  64     m_button->hide();
  65     if (index.isValid() && (index.column() == DolphinModel::Name)) {
  66         m_item = itemForIndex(index);
  67
  68         connect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  69                 this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  70
  71         const QRect rect = m_view->visualRect(index);
  72         const int gap = 2;
  73         const int x = rect.right() - m_button->width() - gap;
  74         int y = rect.top();
  75         if (rect.height() <= m_button->height() * 2) {
  76             // center the button vertically
  77             y += (rect.height() - m_button->height()) / 2;
  78         } else {
  79             y += gap;
  80         }
  81
  82         m_button->move(QPoint(x, y));
  83
  84         QItemSelectionModel* selModel = m_view->selectionModel();
  85         m_button->setChecked(selModel->isSelected(index));
  86         m_button->show();
  87     } else {
  88         m_item = KFileItem();
  89         disconnect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  90                    this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  91     }
  92 }
  93
  94 void SelectionManager::slotViewportEntered()
  95 {
  96     m_button->hide();
  97 }
  98
  99 void SelectionManager::setItemSelected(bool selected)
 100 {
 101     emit selectionChanged();
 102     Q_ASSERT(!m_item.isNull());
 103
 104     const QModelIndex index = indexForItem(m_item);
 105     if (index.isValid()) {
 106         QItemSelectionModel* selModel = m_view->selectionModel();
 107         if (selected) {
 108             selModel->select(index, QItemSelectionModel::Select);
 109         } else {
 110             selModel->select(index, QItemSelectionModel::Deselect);
 111         }
 112     }
 113 }
 114
 115 void SelectionManager::slotRowsRemoved(const QModelIndex& parent, int start, int end)
 116 {
 117     Q_UNUSED(parent);
 118     Q_UNUSED(start);
 119     Q_UNUSED(end);
 120     m_button->hide();
 121 }
 122
 123 KFileItem SelectionManager::itemForIndex(const QModelIndex& index) const
 124 {
 125     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 126     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 127     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 128     return dirModel->itemForIndex(dirIndex);
 129 }
 130
 131 const QModelIndex SelectionManager::indexForItem(const KFileItem& item) const
 132 {
 133     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 134     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 135     const QModelIndex dirIndex = dirModel->indexForItem(item);
 136     return proxyModel->mapFromSource(dirIndex);
 137 }
 138
 139 #include "selectionmanager.moc"