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