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     connect(m_view->selectionModel(), SIGNAL(selectionChanged()),
  51             this, SLOT(slotSelectionChanged()));
  52 }
  53
  54 SelectionManager::~SelectionManager()
  55 {
  56 }
  57
  58 void SelectionManager::slotEntered(const QModelIndex& index)
  59 {
  60     m_button->hide();
  61     if (index.isValid() && (index.column() == DolphinModel::Name)) {
  62         m_item = itemForIndex(index);
  63
  64         const QRect rect = m_view->visualRect(index);
  65         const int gap = 2;
  66         const int x = rect.right() - m_button->width() - gap;
  67         int y = rect.top();
  68         if (rect.height() <= m_button->height() * 2) {
  69             // center the button vertically
  70             y += (rect.height() - m_button->height()) / 2;
  71         } else {
  72             y += gap;
  73         }
  74
  75         m_button->move(QPoint(x, y));
  76
  77         QItemSelectionModel* selModel = m_view->selectionModel();
  78         m_button->setChecked(selModel->isSelected(index));
  79         m_button->show();
  80     } else {
  81         m_item = KFileItem();
  82     }
  83 }
  84
  85 void SelectionManager::slotViewportEntered()
  86 {
  87     m_button->hide();
  88     m_item = KFileItem();
  89 }
  90
  91 void SelectionManager::slotSelectionChanged()
  92 {
  93     const QModelIndex index = indexForItem(m_item);
  94     if (index.isValid()) {
  95         QItemSelectionModel* selModel = m_view->selectionModel();
  96         m_button->setChecked(selModel->isSelected(index));
  97     }
  98 }
  99
 100 void SelectionManager::setItemSelected(bool selected)
 101 {
 102     emit selectionChanged();
 103     Q_ASSERT(!m_item.isNull());
 104
 105     const QModelIndex index = indexForItem(m_item);
 106     if (index.isValid()) {
 107         QItemSelectionModel* selModel = m_view->selectionModel();
 108         if (selected) {
 109             selModel->select(index, QItemSelectionModel::Select);
 110         } else {
 111             selModel->select(index, QItemSelectionModel::Deselect);
 112         }
 113     }
 114 }
 115
 116 KFileItem SelectionManager::itemForIndex(const QModelIndex& index) const
 117 {
 118     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 119     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 120     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 121     return dirModel->itemForIndex(dirIndex);
 122 }
 123
 124 const QModelIndex SelectionManager::indexForItem(const KFileItem& item) const
 125 {
 126     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(m_view->model());
 127     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 128     const QModelIndex dirIndex = dirModel->indexForItem(item);
 129     return proxyModel->mapFromSource(dirIndex);
 130 }
 131
 132 #include "selectionmanager.moc"