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 "dolphinsettings.h"
  26 #include "sidebartreeview.h"
  27 #include "treeviewcontextmenu.h"
  28
  29 #include <kfileplacesmodel.h>
  30 #include <kdirlister.h>
  31 #include <kdirmodel.h>
  32 #include <kfileitem.h>
  33
  34 #include <QtGui/QHeaderView>
  35 #include <QtGui/QItemSelection>
  36 #include <QtGui/QTreeView>
  37 #include <QtGui/QBoxLayout>
  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 }
  47
  48 TreeViewSidebarPage::~TreeViewSidebarPage()
  49 {
  50     delete m_dirLister;
  51     m_dirLister = 0;
  52 }
  53
  54 void TreeViewSidebarPage::setUrl(const KUrl& url)
  55 {
  56     if (!url.isValid() || (url == SidebarPage::url())) {
  57         return;
  58     }
  59
  60     SidebarPage::setUrl(url);
  61     if (m_dirLister != 0) {
  62         loadTree(url);
  63     }
  64 }
  65
  66 void TreeViewSidebarPage::showEvent(QShowEvent* event)
  67 {
  68     if (event->spontaneous()) {
  69         SidebarPage::showEvent(event);
  70         return;
  71     }
  72
  73     if (m_dirLister == 0) {
  74         // Postpone the creating of the dir lister to the first show event.
  75         // This assures that no performance and memory overhead is given when the TreeView is not
  76         // used at all (see TreeViewSidebarPage::setUrl()).
  77         m_dirLister = new KDirLister();
  78         m_dirLister->setDirOnlyMode(true);
  79         m_dirLister->setAutoUpdate(true);
  80         m_dirLister->setMainWindow(this);
  81         m_dirLister->setDelayedMimeTypes(true);
  82         m_dirLister->setAutoErrorHandlingEnabled(false, this);
  83
  84         Q_ASSERT(m_dirModel == 0);
  85         m_dirModel = new KDirModel();
  86         m_dirModel->setDirLister(m_dirLister);
  87         m_dirModel->setDropsAllowed(KDirModel::DropOnDirectory);
  88
  89         Q_ASSERT(m_proxyModel == 0);
  90         m_proxyModel = new DolphinSortFilterProxyModel(this);
  91         m_proxyModel->setSourceModel(m_dirModel);
  92
  93         Q_ASSERT(m_treeView == 0);
  94         m_treeView = new SidebarTreeView(this);
  95         m_treeView->setModel(m_proxyModel);
  96         m_proxyModel->setSorting(DolphinView::SortByName);
  97         m_proxyModel->setSortOrder(Qt::AscendingOrder);
  98
  99         connect(m_treeView, SIGNAL(clicked(const QModelIndex&)),
 100                 this, SLOT(updateActiveView(const QModelIndex&)));
 101         connect(m_treeView, SIGNAL(urlsDropped(const KUrl::List&, const QModelIndex&)),
 102                 this, SLOT(dropUrls(const KUrl::List&, const QModelIndex&)));
 103
 104         QVBoxLayout* layout = new QVBoxLayout(this);
 105         layout->setMargin(0);
 106         layout->addWidget(m_treeView);
 107     }
 108
 109     loadTree(url());
 110     SidebarPage::showEvent(event);
 111 }
 112
 113 void TreeViewSidebarPage::contextMenuEvent(QContextMenuEvent* event)
 114 {
 115     SidebarPage::contextMenuEvent(event);
 116
 117     const QModelIndex index = m_treeView->indexAt(event->pos());
 118     if (!index.isValid()) {
 119         // only open a context menu above a directory item
 120         return;
 121     }
 122
 123     const QModelIndex dirModelIndex = m_proxyModel->mapToSource(index);
 124     KFileItem* item = m_dirModel->itemForIndex(dirModelIndex);
 125
 126     emit changeSelection(KFileItemList());
 127     TreeViewContextMenu contextMenu(this, item);
 128     contextMenu.open();
 129 }
 130
 131 void TreeViewSidebarPage::expandSelectionParent()
 132 {
 133     disconnect(m_dirLister, SIGNAL(completed()),
 134                this, SLOT(expandSelectionParent()));
 135
 136     // expand the parent folder of the selected item
 137     KUrl parentUrl = url().upUrl();
 138     if (!m_dirLister->url().isParentOf(parentUrl)) {
 139         return;
 140     }
 141
 142     QModelIndex index = m_dirModel->indexForUrl(parentUrl);
 143     if (index.isValid()) {
 144         QModelIndex proxyIndex = m_proxyModel->mapFromSource(index);
 145         m_treeView->setExpanded(proxyIndex, true);
 146
 147         // select the item and assure that the item is visible
 148         index = m_dirModel->indexForUrl(url());
 149         if (index.isValid()) {
 150             proxyIndex = m_proxyModel->mapFromSource(index);
 151             m_treeView->scrollTo(proxyIndex);
 152
 153             QItemSelectionModel* selModel = m_treeView->selectionModel();
 154             selModel->setCurrentIndex(proxyIndex, QItemSelectionModel::Select);
 155         }
 156     }
 157 }
 158
 159 void TreeViewSidebarPage::updateActiveView(const QModelIndex& index)
 160 {
 161     const QModelIndex dirIndex = m_proxyModel->mapToSource(index);
 162     const KFileItem* item = m_dirModel->itemForIndex(dirIndex);
 163     if (item != 0) {
 164         const KUrl& url = item->url();
 165         emit changeUrl(url);
 166     }
 167 }
 168
 169 void TreeViewSidebarPage::dropUrls(const KUrl::List& urls,
 170                                    const QModelIndex& index)
 171 {
 172     if (index.isValid()) {
 173         const QModelIndex dirIndex = m_proxyModel->mapToSource(index);
 174         KFileItem* item = m_dirModel->itemForIndex(dirIndex);
 175         Q_ASSERT(item != 0);
 176         if (item->isDir()) {
 177             emit urlsDropped(urls, item->url());
 178         }
 179     }
 180 }
 181
 182 void TreeViewSidebarPage::loadTree(const KUrl& url)
 183 {
 184     Q_ASSERT(m_dirLister != 0);
 185
 186     // adjust the root of the tree to the base bookmark
 187     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 188     KUrl baseUrl = placesModel->url(placesModel->closestItem(url));
 189     if (!baseUrl.isValid()) {
 190         // it's possible that no closest item is available and hence an
 191         // empty URL is returned
 192         baseUrl = url;
 193     }
 194
 195     if (m_dirLister->url() != baseUrl) {
 196         m_dirLister->stop();
 197         m_dirLister->openUrl(baseUrl);
 198     }
 199
 200     // select the folder which contains the given URL
 201     QItemSelectionModel* selModel = m_treeView->selectionModel();
 202     selModel->clearSelection();
 203
 204     const QModelIndex index = m_dirModel->indexForUrl(url);
 205     if (index.isValid()) {
 206         // the item with the given URL is already part of the model
 207         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(index);
 208         m_treeView->scrollTo(proxyIndex);
 209         selModel->setCurrentIndex(proxyIndex, QItemSelectionModel::Select);
 210     } else {
 211         // The item with the given URL is not loaded by the model yet. Iterate
 212         // backward to the base URL and trigger the loading of the items for
 213         // each hierarchy level.
 214         connect(m_dirLister, SIGNAL(completed()),
 215                 this, SLOT(expandSelectionParent()));
 216
 217         // Implementation note: It is important to remove the trailing slash from
 218         // the parent URL, as the directories from the dir lister (KDirLister::directories())
 219         // don't have a trailing slash and hence KUrl::List::contains() would fail...
 220         KUrl parentUrl = url.upUrl();
 221         parentUrl.adjustPath(KUrl::RemoveTrailingSlash);
 222         while (!parentUrl.isParentOf(baseUrl)) {
 223             if (m_dirLister->directories().contains(parentUrl)) {
 224                 m_dirLister->updateDirectory(parentUrl);
 225             } else {
 226                 m_dirLister->openUrl(parentUrl, true, false);
 227             }
 228             parentUrl = parentUrl.upUrl();
 229             parentUrl.adjustPath(KUrl::RemoveTrailingSlash);
 230         }
 231     }
 232 }
 233
 234 #include "treeviewsidebarpage.moc"