src/treeviewsidebarpage.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 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 "treeviewsidebarpage.h"
  21
  22 #include "dolphinmainwindow.h"
  23 #include "dolphinsortfilterproxymodel.h"
  24 #include "dolphinview.h"
  25 #include "sidebartreeview.h"
  26 #include "treeviewcontextmenu.h"
  27
  28 #include <kfileplacesmodel.h>
  29 #include <kdirlister.h>
  30 #include <kdirmodel.h>
  31 #include <kfileitem.h>
  32
  33 #include <QHeaderView>
  34 #include <QItemSelectionModel>
  35 #include <QTreeView>
  36 #include <QVBoxLayout>
  37 #include "dolphinsettings.h"
  38
  39 TreeViewSidebarPage::TreeViewSidebarPage(QWidget* parent) :
  40         SidebarPage(parent),
  41         m_dirLister(0),
  42         m_dirModel(0),
  43         m_proxyModel(0),
  44         m_treeView(0)
  45 {
  46     m_dirLister = new KDirLister();
  47     m_dirLister->setDirOnlyMode(true);
  48     m_dirLister->setAutoUpdate(true);
  49     m_dirLister->setMainWindow(this);
  50     m_dirLister->setDelayedMimeTypes(true);
  51     m_dirLister->setAutoErrorHandlingEnabled(false, this);
  52
  53     m_dirModel = new KDirModel();
  54     m_dirModel->setDirLister(m_dirLister);
  55     m_dirModel->setDropsAllowed(KDirModel::DropOnDirectory);
  56
  57     m_proxyModel = new DolphinSortFilterProxyModel(this);
  58     m_proxyModel->setSourceModel(m_dirModel);
  59
  60     m_treeView = new SidebarTreeView(this);
  61     m_treeView->setModel(m_proxyModel);
  62
  63     m_proxyModel->setSorting(DolphinView::SortByName);
  64     m_proxyModel->setSortOrder(Qt::AscendingOrder);
  65
  66     connect(m_treeView, SIGNAL(clicked(const QModelIndex&)),
  67             this, SLOT(updateActiveView(const QModelIndex&)));
  68     connect(m_treeView, SIGNAL(urlsDropped(const KUrl::List&, const QModelIndex&)),
  69             this, SLOT(dropUrls(const KUrl::List&, const QModelIndex&)));
  70
  71     QVBoxLayout* layout = new QVBoxLayout(this);
  72     layout->setMargin(0);
  73     layout->addWidget(m_treeView);
  74 }
  75
  76 TreeViewSidebarPage::~TreeViewSidebarPage()
  77 {
  78     delete m_dirLister;
  79     m_dirLister = 0;
  80 }
  81
  82 void TreeViewSidebarPage::setUrl(const KUrl& url)
  83 {
  84     if (!url.isValid() || (url == m_url)) {
  85         return;
  86     }
  87
  88     m_url = url;
  89
  90     // adjust the root of the tree to the base bookmark
  91     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
  92     KUrl baseUrl = placesModel->url(placesModel->closestItem(url));
  93     if (!baseUrl.isValid()) {
  94         // it's possible that no closest item is available and hence an
  95         // empty URL is returned
  96         baseUrl = url;
  97     }
  98
  99     if (m_dirLister->url() != baseUrl) {
 100         m_dirLister->stop();
 101         m_dirLister->openUrl(baseUrl);
 102     }
 103
 104     // select the folder which contains the given URL
 105     QItemSelectionModel* selModel = m_treeView->selectionModel();
 106     selModel->clearSelection();
 107
 108     const QModelIndex index = m_dirModel->indexForUrl(url);
 109     if (index.isValid()) {
 110         // the item with the given URL is already part of the model
 111         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(index);
 112         m_treeView->scrollTo(proxyIndex);
 113         selModel->setCurrentIndex(proxyIndex, QItemSelectionModel::Select);
 114     } else {
 115         // The item with the given URL is not loaded by the model yet. Iterate
 116         // backward to the base URL and trigger the loading of the items for
 117         // each hierarchy level.
 118         connect(m_dirLister, SIGNAL(completed()),
 119                 this, SLOT(expandSelectionParent()));
 120
 121         KUrl parentUrl = url.upUrl();
 122         while (!parentUrl.isParentOf(baseUrl)) {
 123             m_dirLister->openUrl(parentUrl, true, false);
 124             parentUrl = parentUrl.upUrl();
 125         }
 126     }
 127
 128 }
 129
 130 void TreeViewSidebarPage::showEvent(QShowEvent* event)
 131 {
 132     SidebarPage::showEvent(event);
 133 }
 134
 135 void TreeViewSidebarPage::contextMenuEvent(QContextMenuEvent* event)
 136 {
 137     SidebarPage::contextMenuEvent(event);
 138
 139     const QModelIndex index = m_treeView->indexAt(event->pos());
 140     if (!index.isValid()) {
 141         // only open a context menu above a directory item
 142         return;
 143     }
 144
 145     const QModelIndex dirModelIndex = m_proxyModel->mapToSource(index);
 146     KFileItem* item = m_dirModel->itemForIndex(dirModelIndex);
 147
 148     emit changeSelection(KFileItemList());
 149     TreeViewContextMenu contextMenu(this, item);
 150     contextMenu.open();
 151 }
 152
 153 void TreeViewSidebarPage::expandSelectionParent()
 154 {
 155     disconnect(m_dirLister, SIGNAL(completed()),
 156                this, SLOT(expandSelectionParent()));
 157
 158     // expand the parent folder of the selected item
 159     KUrl parentUrl = m_url.upUrl();
 160     if (!m_dirLister->url().isParentOf(parentUrl)) {
 161         return;
 162     }
 163
 164     QModelIndex index = m_dirModel->indexForUrl(parentUrl);
 165     if (index.isValid()) {
 166         QModelIndex proxyIndex = m_proxyModel->mapFromSource(index);
 167         m_treeView->setExpanded(proxyIndex, true);
 168
 169         // select the item and assure that the item is visible
 170         index = m_dirModel->indexForUrl(m_url);
 171         if (index.isValid()) {
 172             proxyIndex = m_proxyModel->mapFromSource(index);
 173             m_treeView->scrollTo(proxyIndex);
 174
 175             QItemSelectionModel* selModel = m_treeView->selectionModel();
 176             selModel->setCurrentIndex(proxyIndex, QItemSelectionModel::Select);
 177         }
 178     }
 179 }
 180
 181 void TreeViewSidebarPage::updateActiveView(const QModelIndex& index)
 182 {
 183     const QModelIndex dirIndex = m_proxyModel->mapToSource(index);
 184     const KFileItem* item = m_dirModel->itemForIndex(dirIndex);
 185     if (item != 0) {
 186         const KUrl& url = item->url();
 187         emit changeUrl(url);
 188     }
 189 }
 190
 191 void TreeViewSidebarPage::dropUrls(const KUrl::List& urls,
 192                                    const QModelIndex& index)
 193 {
 194     if (index.isValid()) {
 195         const QModelIndex dirIndex = m_proxyModel->mapToSource(index);
 196         KFileItem* item = m_dirModel->itemForIndex(dirIndex);
 197         Q_ASSERT(item != 0);
 198         if (item->isDir()) {
 199             emit urlsDropped(urls, item->url());
 200         }
 201     }
 202 }
 203
 204 #include "treeviewsidebarpage.moc"