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 <QApplication>
  31 #include <QModelIndex>
  32 #include <QPainter>
  33 #include <QPaintEvent>
  34 #include <QRect>
  35 #include <QTimeLine>
  36
  37 SelectionManager::SelectionManager(QAbstractItemView* parent) :
  38     QObject(parent),
  39     m_view(parent),
  40     m_toggle(0),
  41     m_connected(false)
  42 {
  43     connect(parent, SIGNAL(entered(const QModelIndex&)),
  44             this, SLOT(slotEntered(const QModelIndex&)));
  45     connect(parent, SIGNAL(viewportEntered()),
  46             this, SLOT(slotViewportEntered()));
  47     m_toggle = new SelectionToggle(m_view->viewport());
  48     m_toggle->setCheckable(true);
  49     m_toggle->hide();
  50     connect(m_toggle, SIGNAL(clicked(bool)),
  51             this, SLOT(setItemSelected(bool)));
  52 }
  53
  54 SelectionManager::~SelectionManager()
  55 {
  56 }
  57
  58 void SelectionManager::reset()
  59 {
  60     m_toggle->reset();
  61 }
  62
  63 void SelectionManager::slotEntered(const QModelIndex& index)
  64 {
  65     m_toggle->hide();
  66     const bool showToggle = index.isValid() &&
  67                             (index.column() == DolphinModel::Name) &&
  68                             (QApplication::mouseButtons() == Qt::NoButton);
  69     if (showToggle) {
  70         m_toggle->setUrl(urlForIndex(index));
  71
  72         if (!m_connected) {
  73             connect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  74                     this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  75             connect(m_view->selectionModel(),
  76                     SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
  77                     this,
  78                     SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
  79             m_connected = true;
  80         }
  81
  82         const QRect rect = m_view->visualRect(index);
  83         m_toggle->move(QPoint(rect.left(), rect.top()));
  84
  85         // increase the size of the toggle for large items
  86         const int height = m_view->iconSize().height();
  87         if (height >= KIconLoader::SizeEnormous) {
  88             m_toggle->resize(KIconLoader::SizeMedium, KIconLoader::SizeMedium);
  89         } else if (height >= KIconLoader::SizeLarge) {
  90             m_toggle->resize(KIconLoader::SizeSmallMedium, KIconLoader::SizeSmallMedium);
  91         } else {
  92             m_toggle->resize(KIconLoader::SizeSmall, KIconLoader::SizeSmall);
  93         }
  94
  95         QItemSelectionModel* selModel = m_view->selectionModel();
  96         m_toggle->setChecked(selModel->isSelected(index));
  97         m_toggle->show();
  98     } else {
  99         m_toggle->setUrl(KUrl());
 100         disconnect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
 101                    this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
 102         disconnect(m_view->selectionModel(),
 103                    SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
 104                    this,
 105                    SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
 106         m_connected = false;
 107     }
 108 }
 109
 110 void SelectionManager::slotViewportEntered()
 111 {
 112     m_toggle->hide();
 113 }
 114
 115 void SelectionManager::setItemSelected(bool selected)
 116 {
 117     emit selectionChanged();
 118
 119     if (!m_toggle->url().isEmpty()) {
 120         const QModelIndex index = indexForUrl(m_toggle->url());
 121         if (index.isValid()) {
 122             QItemSelectionModel* selModel = m_view->selectionModel();
 123             if (selected) {
 124                 selModel->select(index, QItemSelectionModel::Select);
 125             } else {
 126                 selModel->select(index, QItemSelectionModel::Deselect);
 127             }
 128             selModel->setCurrentIndex(index, QItemSelectionModel::Current);
 129         }
 130     }
 131 }
 132
 133 void SelectionManager::slotRowsRemoved(const QModelIndex& parent, int start, int end)
 134 {
 135     Q_UNUSED(parent);
 136     Q_UNUSED(start);
 137     Q_UNUSED(end);
 138     m_toggle->hide();
 139 }
 140
 141 void SelectionManager::slotSelectionChanged(const QItemSelection& selected,
 142                                             const QItemSelection& deselected)
 143 {
 144     // The selection has been changed outside the scope of the selection manager
 145     // (e. g. by the rubberband or the "Select All" action). Take care updating
 146     // the state of the toggle button.
 147     if (!m_toggle->url().isEmpty()) {
 148         const QModelIndex index = indexForUrl(m_toggle->url());
 149         if (index.isValid()) {
 150             if (selected.contains(index)) {
 151                 m_toggle->setChecked(true);
 152             }
 153
 154             if (deselected.contains(index)) {
 155                 m_toggle->setChecked(false);
 156             }
 157         }
 158     }
 159 }
 160
 161 KUrl SelectionManager::urlForIndex(const QModelIndex& index) const
 162 {
 163     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 164     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 165     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 166     return dirModel->itemForIndex(dirIndex).url();
 167 }
 168
 169 const QModelIndex SelectionManager::indexForUrl(const KUrl& url) const
 170 {
 171     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 172     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 173     const QModelIndex dirIndex = dirModel->indexForUrl(url);
 174     return proxyModel->mapFromSource(dirIndex);
 175 }
 176
 177 #include "selectionmanager.moc"