apps/dolphin/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 #include <QTimeLine>
  35
  36 SelectionManager::SelectionManager(QAbstractItemView* parent) :
  37     QObject(parent),
  38     m_view(parent),
  39     m_toggle(0),
  40     m_connected(false)
  41 {
  42     connect(parent, SIGNAL(entered(const QModelIndex&)),
  43             this, SLOT(slotEntered(const QModelIndex&)));
  44     connect(parent, SIGNAL(viewportEntered()),
  45             this, SLOT(slotViewportEntered()));
  46     m_toggle = new SelectionToggle(m_view->viewport());
  47     m_toggle->setCheckable(true);
  48     m_toggle->hide();
  49     connect(m_toggle, SIGNAL(clicked(bool)),
  50             this, SLOT(setItemSelected(bool)));
  51 }
  52
  53 SelectionManager::~SelectionManager()
  54 {
  55 }
  56
  57 void SelectionManager::reset()
  58 {
  59     m_toggle->reset();
  60 }
  61
  62 void SelectionManager::slotEntered(const QModelIndex& index)
  63 {
  64     m_toggle->hide();
  65     if (index.isValid() && (index.column() == DolphinModel::Name)) {
  66         m_toggle->setUrl(urlForIndex(index));
  67
  68         if (!m_connected) {
  69             connect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  70                     this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  71             connect(m_view->selectionModel(),
  72                     SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
  73                     this,
  74                     SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
  75             m_connected = true;
  76         }
  77
  78         const QRect rect = m_view->visualRect(index);
  79
  80         const int gap = 2;
  81         const int x = rect.left() + gap;
  82         const int y = rect.top() + gap;
  83         m_toggle->move(QPoint(x, y));
  84
  85         QItemSelectionModel* selModel = m_view->selectionModel();
  86         m_toggle->setChecked(selModel->isSelected(index));
  87         m_toggle->show();
  88     } else {
  89         m_toggle->setUrl(KUrl());
  90         disconnect(m_view->model(), SIGNAL(rowsRemoved(const QModelIndex&, int, int)),
  91                    this, SLOT(slotRowsRemoved(const QModelIndex&, int, int)));
  92         disconnect(m_view->selectionModel(),
  93                    SIGNAL(selectionChanged(const QItemSelection&, const QItemSelection&)),
  94                    this,
  95                    SLOT(slotSelectionChanged(const QItemSelection&, const QItemSelection&)));
  96         m_connected = false;
  97     }
  98 }
  99
 100 void SelectionManager::slotViewportEntered()
 101 {
 102     m_toggle->hide();
 103 }
 104
 105 void SelectionManager::setItemSelected(bool selected)
 106 {
 107     emit selectionChanged();
 108
 109     if (!m_toggle->url().isEmpty()) {
 110         const QModelIndex index = indexForUrl(m_toggle->url());
 111         if (index.isValid()) {
 112             QItemSelectionModel* selModel = m_view->selectionModel();
 113             if (selected) {
 114                 selModel->select(index, QItemSelectionModel::Select);
 115             } else {
 116                 selModel->select(index, QItemSelectionModel::Deselect);
 117             }
 118             selModel->setCurrentIndex(index, QItemSelectionModel::Current);
 119         }
 120     }
 121 }
 122
 123 void SelectionManager::slotRowsRemoved(const QModelIndex& parent, int start, int end)
 124 {
 125     Q_UNUSED(parent);
 126     Q_UNUSED(start);
 127     Q_UNUSED(end);
 128     m_toggle->hide();
 129 }
 130
 131 void SelectionManager::slotSelectionChanged(const QItemSelection& selected,
 132                                             const QItemSelection& deselected)
 133 {
 134     // The selection has been changed outside the scope of the selection manager
 135     // (e. g. by the rubberband or the "Select All" action). Take care updating
 136     // the state of the toggle button.
 137     if (!m_toggle->url().isEmpty()) {
 138         const QModelIndex index = indexForUrl(m_toggle->url());
 139         if (index.isValid()) {
 140             if (selected.contains(index)) {
 141                 m_toggle->setChecked(true);
 142             }
 143
 144             if (deselected.contains(index)) {
 145                 m_toggle->setChecked(false);
 146             }
 147         }
 148     }
 149 }
 150
 151 KUrl SelectionManager::urlForIndex(const QModelIndex& index) const
 152 {
 153     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 154     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 155     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 156     return dirModel->itemForIndex(dirIndex).url();
 157 }
 158
 159 const QModelIndex SelectionManager::indexForUrl(const KUrl& url) const
 160 {
 161     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 162     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 163     const QModelIndex dirIndex = dirModel->indexForUrl(url);
 164     return proxyModel->mapFromSource(dirIndex);
 165 }
 166
 167 #include "selectionmanager.moc"