src/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 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 "dolphincolumnview.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "dolphincontroller.h"
  24 #include "dolphinsettings.h"
  25
  26 #include "dolphin_columnmodesettings.h"
  27
  28 #include <kcolorutils.h>
  29 #include <kcolorscheme.h>
  30 #include <kdirlister.h>
  31
  32 #include <QAbstractProxyModel>
  33 #include <QApplication>
  34 #include <QPoint>
  35 #include <QScrollBar>
  36 #include <QTimeLine>
  37
  38 /**
  39  * Represents one column inside the DolphinColumnView and has been
  40  * extended to respect view options and hovering information.
  41  */
  42 class ColumnWidget : public QListView
  43 {
  44 public:
  45     ColumnWidget(QWidget* parent,
  46                  DolphinColumnView* columnView,
  47                  const KUrl& url);
  48     virtual ~ColumnWidget();
  49
  50     /** Sets the size of the icons. */
  51     void setDecorationSize(const QSize& size);
  52
  53     /**
  54      * An active column is defined as column, which shows the same URL
  55      * as indicated by the URL navigator. The active column is usually
  56      * drawn in a lighter color. All operations are applied to this column.
  57      */
  58     void setActive(bool active);
  59     bool isActive() const;
  60
  61     /**
  62      * Sets the directory URL of the child column that is shown next to
  63      * this column. This property is only used for a visual indication
  64      * of the shown directory, it does not trigger a loading of the model.
  65      */
  66     void setChildUrl(const KUrl& url);
  67     const KUrl& childUrl() const;
  68
  69     /** Sets the directory URL that is shown inside the column widget. */
  70     void setUrl(const KUrl& url);
  71
  72     /** Returns the directory URL that is shown inside the column widget. */
  73     inline const KUrl& url() const;
  74
  75 protected:
  76     virtual QStyleOptionViewItem viewOptions() const;
  77     virtual void dragEnterEvent(QDragEnterEvent* event);
  78     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  79     virtual void dragMoveEvent(QDragMoveEvent* event);
  80     virtual void dropEvent(QDropEvent* event);
  81     virtual void paintEvent(QPaintEvent* event);
  82     virtual void mousePressEvent(QMouseEvent* event);
  83     virtual void keyPressEvent(QKeyEvent* event);
  84     virtual void contextMenuEvent(QContextMenuEvent* event);
  85     virtual void selectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
  86
  87 private:
  88     /** Used by ColumnWidget::setActive(). */
  89     void activate();
  90
  91     /** Used by ColumnWidget::setActive(). */
  92     void deactivate();
  93
  94 private:
  95     bool m_active;
  96     DolphinColumnView* m_view;
  97     KUrl m_url;      // URL of the directory that is shown
  98     KUrl m_childUrl; // URL of the next column that is shown
  99     QStyleOptionViewItem m_viewOptions;
 100
 101     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 102     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 103 };
 104
 105 ColumnWidget::ColumnWidget(QWidget* parent,
 106                            DolphinColumnView* columnView,
 107                            const KUrl& url) :
 108     QListView(parent),
 109     m_active(true),
 110     m_view(columnView),
 111     m_url(url),
 112     m_childUrl(),
 113     m_dragging(false),
 114     m_dropRect()
 115 {
 116     setMouseTracking(true);
 117     viewport()->setAttribute(Qt::WA_Hover);
 118     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 119     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 120     setSelectionBehavior(SelectItems);
 121     setSelectionMode(QAbstractItemView::ExtendedSelection);
 122     setDragDropMode(QAbstractItemView::DragDrop);
 123     setDropIndicatorShown(false);
 124     setFocusPolicy(Qt::NoFocus);
 125
 126     // apply the column mode settings to the widget
 127     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 128     Q_ASSERT(settings != 0);
 129
 130     m_viewOptions = QListView::viewOptions();
 131
 132     QFont font(settings->fontFamily(), settings->fontSize());
 133     font.setItalic(settings->italicFont());
 134     font.setBold(settings->boldFont());
 135     m_viewOptions.font = font;
 136
 137     const int iconSize = settings->iconSize();
 138     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 139
 140     KFileItemDelegate* delegate = new KFileItemDelegate(this);
 141     setItemDelegate(delegate);
 142
 143     activate();
 144
 145     connect(this, SIGNAL(entered(const QModelIndex&)),
 146             m_view->m_controller, SLOT(emitItemEntered(const QModelIndex&)));
 147     connect(this, SIGNAL(viewportEntered()),
 148             m_view->m_controller, SLOT(emitViewportEntered()));
 149 }
 150
 151 ColumnWidget::~ColumnWidget()
 152 {
 153 }
 154
 155 void ColumnWidget::setDecorationSize(const QSize& size)
 156 {
 157     m_viewOptions.decorationSize = size;
 158     doItemsLayout();
 159 }
 160
 161 void ColumnWidget::setActive(bool active)
 162 {
 163     if (m_active == active) {
 164         return;
 165     }
 166
 167     m_active = active;
 168
 169     if (active) {
 170         activate();
 171     } else {
 172         deactivate();
 173     }
 174 }
 175
 176 inline bool ColumnWidget::isActive() const
 177 {
 178     return m_active;
 179 }
 180
 181 inline void ColumnWidget::setChildUrl(const KUrl& url)
 182 {
 183     m_childUrl = url;
 184 }
 185
 186 inline const KUrl& ColumnWidget::childUrl() const
 187 {
 188     return m_childUrl;
 189 }
 190
 191 inline void ColumnWidget::setUrl(const KUrl& url)
 192 {
 193     m_url = url;
 194 }
 195
 196 const KUrl& ColumnWidget::url() const
 197 {
 198     return m_url;
 199 }
 200
 201 QStyleOptionViewItem ColumnWidget::viewOptions() const
 202 {
 203     return m_viewOptions;
 204 }
 205
 206 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 207 {
 208     if (event->mimeData()->hasUrls()) {
 209         event->acceptProposedAction();
 210     }
 211
 212     m_dragging = true;
 213 }
 214
 215 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 216 {
 217     QListView::dragLeaveEvent(event);
 218
 219     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 220     m_dragging = false;
 221     setDirtyRegion(m_dropRect);
 222 }
 223
 224 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 225 {
 226     QListView::dragMoveEvent(event);
 227
 228     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 229     const QModelIndex index = indexAt(event->pos());
 230     setDirtyRegion(m_dropRect);
 231     m_dropRect = visualRect(index);
 232     setDirtyRegion(m_dropRect);
 233 }
 234
 235 void ColumnWidget::dropEvent(QDropEvent* event)
 236 {
 237     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 238     if (!urls.isEmpty()) {
 239         event->acceptProposedAction();
 240         m_view->m_controller->indicateDroppedUrls(urls,
 241                                                   url(),
 242                                                   indexAt(event->pos()),
 243                                                   event->source());
 244     }
 245     QListView::dropEvent(event);
 246     m_dragging = false;
 247 }
 248
 249 void ColumnWidget::paintEvent(QPaintEvent* event)
 250 {
 251     if (!m_childUrl.isEmpty()) {
 252         // indicate the shown URL of the next column by highlighting the shown folder item
 253         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 254         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 255         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 256             const QRect itemRect = visualRect(proxyIndex);
 257             QPainter painter(viewport());
 258             painter.save();
 259
 260             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 261             color.setAlpha(32);
 262             painter.setPen(Qt::NoPen);
 263             painter.setBrush(color);
 264             painter.drawRect(itemRect);
 265
 266             painter.restore();
 267         }
 268     }
 269
 270     QListView::paintEvent(event);
 271
 272     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 273     if (m_dragging) {
 274         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 275         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 276     }
 277 }
 278
 279 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 280 {
 281     if (!m_active) {
 282         m_view->requestActivation(this);
 283     }
 284
 285     QListView::mousePressEvent(event);
 286 }
 287
 288 void ColumnWidget::keyPressEvent(QKeyEvent* event)
 289 {
 290     QListView::keyPressEvent(event);
 291
 292     const QItemSelectionModel* selModel = selectionModel();
 293     const QModelIndex currentIndex = selModel->currentIndex();
 294     const bool triggerItem = currentIndex.isValid()
 295                              && (event->key() == Qt::Key_Return)
 296                              && (selModel->selectedIndexes().count() <= 1);
 297     if (triggerItem) {
 298         m_view->m_controller->triggerItem(currentIndex);
 299     }
 300 }
 301
 302 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 303 {
 304     if (!m_active) {
 305         m_view->requestActivation(this);
 306     }
 307
 308     QListView::contextMenuEvent(event);
 309
 310     const QModelIndex index = indexAt(event->pos());
 311     if (index.isValid() || m_active) {
 312         // Only open a context menu above an item or if the mouse is above
 313         // the active column.
 314         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 315         m_view->m_controller->triggerContextMenuRequest(pos);
 316     }
 317 }
 318
 319 void ColumnWidget::selectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
 320 {
 321     QListView::selectionChanged(selected, deselected);
 322
 323     QItemSelectionModel* selModel = m_view->selectionModel();
 324     selModel->select(selected, QItemSelectionModel::Select);
 325     selModel->select(deselected, QItemSelectionModel::Deselect);
 326 }
 327
 328 void ColumnWidget::activate()
 329 {
 330     if (m_view->hasFocus()) {
 331         setFocus(Qt::OtherFocusReason);
 332     }
 333     m_view->setFocusProxy(this);
 334
 335     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 336     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 337     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 338     if (KGlobalSettings::singleClick()) {
 339         connect(this, SIGNAL(clicked(const QModelIndex&)),
 340                 m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 341     } else {
 342         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 343                 m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 344     }
 345
 346     const QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 347     QPalette palette = viewport()->palette();
 348     palette.setColor(viewport()->backgroundRole(), bgColor);
 349     viewport()->setPalette(palette);
 350
 351     if (!m_childUrl.isEmpty()) {
 352         // assure that the current index is set on the index that represents
 353         // the child URL
 354         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 355         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 356         selectionModel()->setCurrentIndex(proxyIndex, QItemSelectionModel::Current);
 357     }
 358
 359     update();
 360 }
 361
 362 void ColumnWidget::deactivate()
 363 {
 364     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 365     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 366     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 367     if (KGlobalSettings::singleClick()) {
 368         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 369                    m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 370     } else {
 371         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 372                    m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 373     }
 374
 375     const QPalette palette = m_view->viewport()->palette();
 376     viewport()->setPalette(palette);
 377
 378     selectionModel()->clear();
 379     update();
 380 }
 381
 382 // ---
 383
 384 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 385     QAbstractItemView(parent),
 386     m_controller(controller),
 387     m_restoreActiveColumnFocus(false),
 388     m_index(-1),
 389     m_contentX(0),
 390     m_columns(),
 391     m_animation(0),
 392     m_dolphinModel(0),
 393     m_proxyModel(0)
 394 {
 395     Q_ASSERT(controller != 0);
 396
 397     setAcceptDrops(true);
 398     setDragDropMode(QAbstractItemView::DragDrop);
 399     setDropIndicatorShown(false);
 400     setSelectionMode(ExtendedSelection);
 401
 402     connect(this, SIGNAL(entered(const QModelIndex&)),
 403             controller, SLOT(emitItemEntered(const QModelIndex&)));
 404     connect(this, SIGNAL(viewportEntered()),
 405             controller, SLOT(emitViewportEntered()));
 406     connect(controller, SIGNAL(zoomIn()),
 407             this, SLOT(zoomIn()));
 408     connect(controller, SIGNAL(zoomOut()),
 409             this, SLOT(zoomOut()));
 410     connect(controller, SIGNAL(urlChanged(const KUrl&)),
 411             this, SLOT(showColumn(const KUrl&)));
 412
 413     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
 414             this, SLOT(moveContentHorizontally(int)));
 415
 416     ColumnWidget* column = new ColumnWidget(viewport(), this, m_controller->url());
 417     m_columns.append(column);
 418     setActiveColumnIndex(0);
 419
 420     updateDecorationSize();
 421
 422     m_animation = new QTimeLine(500, this);
 423     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
 424
 425     // dim the background of the viewport
 426     QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 427     const QColor fgColor = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 428     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 429
 430     QPalette palette = viewport()->palette();
 431     palette.setColor(viewport()->backgroundRole(), bgColor);
 432     viewport()->setPalette(palette);
 433 }
 434
 435 DolphinColumnView::~DolphinColumnView()
 436 {
 437 }
 438
 439 QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
 440 {
 441     foreach (ColumnWidget* column, m_columns) {
 442         const QPoint topLeft = column->frameGeometry().topLeft();
 443         const QPoint adjustedPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
 444         const QModelIndex index = column->indexAt(adjustedPoint);
 445         if (index.isValid()) {
 446             return index;
 447         }
 448     }
 449
 450     return QModelIndex();
 451 }
 452
 453 void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 454 {
 455     activeColumn()->scrollTo(index, hint);
 456 }
 457
 458 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 459 {
 460     return activeColumn()->visualRect(index);
 461 }
 462
 463 void DolphinColumnView::setModel(QAbstractItemModel* model)
 464 {
 465     if (m_dolphinModel != 0) {
 466         m_dolphinModel->disconnect(this);
 467     }
 468
 469     m_proxyModel = static_cast<QAbstractProxyModel*>(model);
 470     m_dolphinModel = static_cast<DolphinModel*>(m_proxyModel->sourceModel());
 471     connect(m_dolphinModel, SIGNAL(expand(const QModelIndex&)),
 472             this, SLOT(triggerReloadColumns(const QModelIndex&)));
 473
 474     activeColumn()->setModel(model);
 475     QAbstractItemView::setModel(model);
 476 }
 477
 478 void DolphinColumnView::reload()
 479 {
 480     // Due to the reloading of the model all columns will be reset to show
 481     // the same content as the first column. As this is not wanted, all columns
 482     // except of the first column are temporary hidden until the root index can
 483     // be updated again.
 484     m_restoreActiveColumnFocus = false;
 485     QList<ColumnWidget*>::iterator start = m_columns.begin() + 1;
 486     QList<ColumnWidget*>::iterator end = m_columns.end();
 487     for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 488         ColumnWidget* column = (*it);
 489         if (column->isActive() && column->hasFocus()) {
 490             // because of hiding the column, it will lose the focus
 491             // -> remember that the focus should be restored after reloading
 492             m_restoreActiveColumnFocus = true;
 493         }
 494         column->hide();
 495    }
 496
 497     // all columns are hidden, now reload the directory lister
 498     KDirLister* dirLister = m_dolphinModel->dirLister();
 499     connect(dirLister, SIGNAL(completed()),
 500             this, SLOT(expandToActiveUrl()));
 501     const KUrl rootUrl = m_columns[0]->url();
 502     dirLister->openUrl(rootUrl, false, true);
 503 }
 504
 505 void DolphinColumnView::showColumn(const KUrl& url)
 506 {
 507     const KUrl& rootUrl = m_columns[0]->url();
 508     if (!rootUrl.isParentOf(url)) {
 509         // the URL is no child URL of the column view, hence do nothing
 510         return;
 511     }
 512
 513     KDirLister* dirLister = m_dolphinModel->dirLister();
 514     const KUrl dirListerUrl = dirLister->url();
 515     if (dirListerUrl != rootUrl) {
 516         // It is possible that root URL of the directory lister is adjusted
 517         // after creating the column widget (e. g. when restoring the history
 518         // having a different root URL than the controller indicates).
 519         m_columns[0]->setUrl(dirListerUrl);
 520     }
 521
 522     int columnIndex = 0;
 523     foreach (ColumnWidget* column, m_columns) {
 524         if (column->url() == url) {
 525             // the column represents already the requested URL, hence activate it
 526             requestActivation(column);
 527             return;
 528         } else if (!column->url().isParentOf(url)) {
 529             // the column is no parent of the requested URL, hence
 530             // just delete all remaining columns
 531             if (columnIndex > 0) {
 532                 QList<ColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 533                 QList<ColumnWidget*>::iterator end = m_columns.end();
 534                 for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 535                     (*it)->deleteLater();
 536                 }
 537                 m_columns.erase(start, end);
 538
 539                 const int maxIndex = m_columns.count() - 1;
 540                 Q_ASSERT(maxIndex >= 0);
 541                 if (m_index > maxIndex) {
 542                     m_index = maxIndex;
 543                 }
 544                 break;
 545             }
 546         }
 547         ++columnIndex;
 548     }
 549
 550     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 551     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 552     // "c" will be created.
 553     const int lastIndex = m_columns.count() - 1;
 554     Q_ASSERT(lastIndex >= 0);
 555
 556     const KUrl& activeUrl = m_columns[lastIndex]->url();
 557     Q_ASSERT(activeUrl.isParentOf(url));
 558     Q_ASSERT(activeUrl != url);
 559
 560     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 561     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 562
 563     columnIndex = lastIndex;
 564     int slashIndex = path.count('/');
 565     bool hasSubPath = (slashIndex >= 0);
 566     while (hasSubPath) {
 567         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 568         if (subPath.isEmpty()) {
 569             hasSubPath = false;
 570         } else {
 571             path += subPath + '/';
 572             ++slashIndex;
 573
 574             const KUrl childUrl = KUrl(path);
 575             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(KUrl(path));
 576             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 577
 578             m_columns[columnIndex]->setChildUrl(childUrl);
 579             columnIndex++;
 580
 581             ColumnWidget* column = new ColumnWidget(viewport(), this, childUrl);
 582             column->setModel(model());
 583             column->setRootIndex(proxyIndex);
 584             column->setActive(false);
 585
 586             m_columns.append(column);
 587
 588             // Before invoking layoutColumns() the column must be set visible temporary.
 589             // To prevent a flickering the initial geometry is set to a hidden position.
 590             column->setGeometry(QRect(-1, -1, 1, 1));
 591             column->show();
 592             layoutColumns();
 593             updateScrollBar();
 594
 595             // the layout is finished, now let the column be invisible until it
 596             // gets a valid root index due to expandToActiveUrl()
 597             column->hide();
 598         }
 599     }
 600
 601     // set the last column as active column without modifying the controller
 602     // and hence the history
 603     activeColumn()->setActive(false);
 604     m_index = columnIndex;
 605     activeColumn()->setActive(true);
 606
 607     expandToActiveUrl();
 608 }
 609
 610 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 611 {
 612     Q_UNUSED(index);
 613     return false;//activeColumn()->isIndexHidden(index);
 614 }
 615
 616 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 617 {
 618     // Parts of this code have been taken from QColumnView::moveCursor().
 619     // Copyright (C) 1992-2007 Trolltech ASA.
 620
 621     Q_UNUSED(modifiers);
 622     if (model() == 0) {
 623         return QModelIndex();
 624     }
 625
 626     const QModelIndex current = currentIndex();
 627     if (isRightToLeft()) {
 628         if (cursorAction == MoveLeft) {
 629             cursorAction = MoveRight;
 630         } else if (cursorAction == MoveRight) {
 631             cursorAction = MoveLeft;
 632         }
 633     }
 634
 635     switch (cursorAction) {
 636     case MoveLeft:
 637         if (m_index > 0) {
 638             setActiveColumnIndex(m_index - 1);
 639         }
 640         break;
 641
 642     case MoveRight:
 643         if (m_index < m_columns.count() - 1) {
 644             setActiveColumnIndex(m_index + 1);
 645         }
 646         break;
 647
 648     default:
 649         break;
 650     }
 651
 652     return QModelIndex();
 653 }
 654
 655 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 656 {
 657     Q_UNUSED(rect);
 658     Q_UNUSED(flags);
 659     //activeColumn()->setSelection(rect, flags);
 660 }
 661
 662 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 663 {
 664     Q_UNUSED(selection);
 665     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 666 }
 667
 668 int DolphinColumnView::horizontalOffset() const
 669 {
 670     return -m_contentX;
 671 }
 672
 673 int DolphinColumnView::verticalOffset() const
 674 {
 675     return 0;
 676 }
 677
 678 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 679 {
 680     m_controller->triggerActivation();
 681     QAbstractItemView::mousePressEvent(event);
 682 }
 683
 684 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 685 {
 686     QAbstractItemView::resizeEvent(event);
 687     layoutColumns();
 688     updateScrollBar();
 689 }
 690
 691 void DolphinColumnView::zoomIn()
 692 {
 693     if (isZoomInPossible()) {
 694         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 695         // TODO: get rid of K3Icon sizes
 696         switch (settings->iconSize()) {
 697         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 698         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 699         default: Q_ASSERT(false); break;
 700         }
 701         updateDecorationSize();
 702     }
 703 }
 704
 705 void DolphinColumnView::zoomOut()
 706 {
 707     if (isZoomOutPossible()) {
 708         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 709         // TODO: get rid of K3Icon sizes
 710         switch (settings->iconSize()) {
 711         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 712         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 713         default: Q_ASSERT(false); break;
 714         }
 715         updateDecorationSize();
 716     }
 717 }
 718
 719 void DolphinColumnView::moveContentHorizontally(int x)
 720 {
 721     m_contentX = -x;
 722     layoutColumns();
 723 }
 724
 725 void DolphinColumnView::updateDecorationSize()
 726 {
 727     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 728     const int iconSize = settings->iconSize();
 729
 730     foreach (QObject* object, viewport()->children()) {
 731         if (object->inherits("QListView")) {
 732             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 733             widget->setDecorationSize(QSize(iconSize, iconSize));
 734         }
 735     }
 736
 737     m_controller->setZoomInPossible(isZoomInPossible());
 738     m_controller->setZoomOutPossible(isZoomOutPossible());
 739
 740     doItemsLayout();
 741 }
 742
 743 void DolphinColumnView::expandToActiveUrl()
 744 {
 745     const int lastIndex = m_columns.count() - 1;
 746     Q_ASSERT(lastIndex >= 0);
 747     const KUrl& activeUrl = m_columns[lastIndex]->url();
 748     const KUrl rootUrl = m_dolphinModel->dirLister()->url();
 749     if (rootUrl.isParentOf(activeUrl) && (rootUrl != activeUrl)) {
 750         m_dolphinModel->expandToUrl(activeUrl);
 751         reloadColumns();
 752     }
 753 }
 754
 755 void DolphinColumnView::triggerReloadColumns(const QModelIndex& index)
 756 {
 757     Q_UNUSED(index);
 758     // the reloading of the columns may not be done in the context of this slot
 759     QMetaObject::invokeMethod(this, "reloadColumns", Qt::QueuedConnection);
 760 }
 761
 762 void DolphinColumnView::reloadColumns()
 763 {
 764     const int end = m_columns.count() - 2; // next to last column
 765     for (int i = 0; i <= end; ++i) {
 766         ColumnWidget* nextColumn = m_columns[i + 1];
 767         const QModelIndex rootIndex = nextColumn->rootIndex();
 768         if (rootIndex.isValid()) {
 769             nextColumn->show();
 770         } else {
 771             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_columns[i]->childUrl());
 772             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 773             if (proxyIndex.isValid()) {
 774                 nextColumn->setRootIndex(proxyIndex);
 775                 nextColumn->show();
 776                 if (nextColumn->isActive() && m_restoreActiveColumnFocus) {
 777                     nextColumn->setFocus();
 778                     m_restoreActiveColumnFocus = false;
 779                 }
 780             }
 781         }
 782     }
 783     assureVisibleActiveColumn();
 784 }
 785
 786 bool DolphinColumnView::isZoomInPossible() const
 787 {
 788     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 789     return settings->iconSize() < K3Icon::SizeLarge;
 790 }
 791
 792 bool DolphinColumnView::isZoomOutPossible() const
 793 {
 794     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 795     return settings->iconSize() > K3Icon::SizeSmall;
 796 }
 797
 798 void DolphinColumnView::setActiveColumnIndex(int index)
 799 {
 800     if (m_index == index) {
 801         return;
 802     }
 803
 804     const bool hasActiveColumn = (m_index >= 0);
 805     if (hasActiveColumn) {
 806         m_columns[m_index]->setActive(false);
 807     }
 808
 809     m_index = index;
 810     m_columns[m_index]->setActive(true);
 811
 812     m_controller->setUrl(m_columns[m_index]->url());
 813 }
 814
 815 void DolphinColumnView::layoutColumns()
 816 {
 817     int x = m_contentX;
 818     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 819     const int columnWidth = settings->columnWidth();
 820     foreach (ColumnWidget* column, m_columns) {
 821         column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 822         x += columnWidth;
 823     }
 824 }
 825
 826 void DolphinColumnView::updateScrollBar()
 827 {
 828     int contentWidth = 0;
 829     foreach (ColumnWidget* column, m_columns) {
 830         contentWidth += column->width();
 831     }
 832
 833     horizontalScrollBar()->setPageStep(contentWidth);
 834     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 835 }
 836
 837 void DolphinColumnView::assureVisibleActiveColumn()
 838 {
 839     const int viewportWidth = viewport()->width();
 840     const int x = activeColumn()->x();
 841     const int width = activeColumn()->width();
 842     if (x + width > viewportWidth) {
 843         int newContentX = m_contentX - x - width + viewportWidth;
 844         if (newContentX > 0) {
 845             newContentX = 0;
 846         }
 847         m_animation->setFrameRange(-m_contentX, -newContentX);
 848         m_animation->start();
 849     } else if (x < 0) {
 850         const int newContentX = m_contentX - x;
 851         m_animation->setFrameRange(-m_contentX, -newContentX);
 852         m_animation->start();
 853     }
 854 }
 855
 856 void DolphinColumnView::requestActivation(ColumnWidget* column)
 857 {
 858     if (column->isActive()) {
 859         assureVisibleActiveColumn();
 860     } else {
 861         int index = 0;
 862         foreach (ColumnWidget* currColumn, m_columns) {
 863             if (currColumn == column) {
 864                 setActiveColumnIndex(index);
 865                 assureVisibleActiveColumn();
 866                 return;
 867             }
 868             ++index;
 869         }
 870     }
 871 }
 872
 873 void DolphinColumnView::deleteInactiveChildColumns()
 874 {
 875     QList<ColumnWidget*>::iterator start = m_columns.begin() + m_index + 1;
 876     QList<ColumnWidget*>::iterator end = m_columns.end();
 877     for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 878         (*it)->deleteLater();
 879     }
 880     m_columns.erase(start, end);
 881 }
 882
 883 #include "dolphincolumnview.moc"