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         column->setRootIndex(QModelIndex());
 496    }
 497
 498     // all columns are hidden, now reload the directory lister
 499     KDirLister* dirLister = m_dolphinModel->dirLister();
 500     connect(dirLister, SIGNAL(completed()),
 501             this, SLOT(expandToActiveUrl()));
 502     const KUrl rootUrl = m_columns[0]->url();
 503     dirLister->openUrl(rootUrl, false, true);
 504 }
 505
 506 void DolphinColumnView::showColumn(const KUrl& url)
 507 {
 508     const KUrl& rootUrl = m_columns[0]->url();
 509     if (!rootUrl.isParentOf(url)) {
 510         // the URL is no child URL of the column view, hence do nothing
 511         return;
 512     }
 513
 514     KDirLister* dirLister = m_dolphinModel->dirLister();
 515     const KUrl dirListerUrl = dirLister->url();
 516     if (dirListerUrl != rootUrl) {
 517         // It is possible that root URL of the directory lister is adjusted
 518         // after creating the column widget (e. g. when restoring the history
 519         // having a different root URL than the controller indicates).
 520         m_columns[0]->setUrl(dirListerUrl);
 521     }
 522
 523     int columnIndex = 0;
 524     foreach (ColumnWidget* column, m_columns) {
 525         if (column->url() == url) {
 526             // the column represents already the requested URL, hence activate it
 527             requestActivation(column);
 528             return;
 529         } else if (!column->url().isParentOf(url)) {
 530             // the column is no parent of the requested URL, hence
 531             // just delete all remaining columns
 532             if (columnIndex > 0) {
 533                 QList<ColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 534                 QList<ColumnWidget*>::iterator end = m_columns.end();
 535                 for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 536                     (*it)->deleteLater();
 537                 }
 538                 m_columns.erase(start, end);
 539                 break;
 540             }
 541         }
 542         ++columnIndex;
 543     }
 544
 545     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 546     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 547     // "c" will be created.
 548     const int lastIndex = m_columns.count() - 1;
 549     Q_ASSERT(lastIndex >= 0);
 550
 551     const KUrl& activeUrl = m_columns[lastIndex]->url();
 552     Q_ASSERT(activeUrl.isParentOf(url));
 553     Q_ASSERT(activeUrl != url);
 554
 555     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 556     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 557
 558     columnIndex = lastIndex;
 559     int slashIndex = path.count('/');
 560     bool hasSubPath = (slashIndex >= 0);
 561     while (hasSubPath) {
 562         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 563         if (subPath.isEmpty()) {
 564             hasSubPath = false;
 565         } else {
 566             path += subPath + '/';
 567             ++slashIndex;
 568
 569             const KUrl childUrl = KUrl(path);
 570             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(KUrl(path));
 571             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 572
 573             m_columns[columnIndex]->setChildUrl(childUrl);
 574             columnIndex++;
 575
 576             ColumnWidget* column = new ColumnWidget(viewport(), this, childUrl);
 577             column->setModel(model());
 578             column->setRootIndex(proxyIndex);
 579             column->setActive(false);
 580
 581             m_columns.append(column);
 582
 583             // Before invoking layoutColumns() the column must be shown. To prevent
 584             // a flickering the initial geometry is set to be invisible.
 585             column->setGeometry(QRect(-1, -1, 1, 1));
 586             column->show();
 587             layoutColumns();
 588         }
 589     }
 590
 591     // set the last column as active column without modifying the controller
 592     // and hence the history
 593     activeColumn()->setActive(false);
 594     m_index = columnIndex;
 595     activeColumn()->setActive(true);
 596
 597     expandToActiveUrl();
 598 }
 599
 600 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 601 {
 602     Q_UNUSED(index);
 603     return false;//activeColumn()->isIndexHidden(index);
 604 }
 605
 606 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 607 {
 608     // Parts of this code have been taken from QColumnView::moveCursor().
 609     // Copyright (C) 1992-2007 Trolltech ASA.
 610
 611     Q_UNUSED(modifiers);
 612     if (model() == 0) {
 613         return QModelIndex();
 614     }
 615
 616     const QModelIndex current = currentIndex();
 617     if (isRightToLeft()) {
 618         if (cursorAction == MoveLeft) {
 619             cursorAction = MoveRight;
 620         } else if (cursorAction == MoveRight) {
 621             cursorAction = MoveLeft;
 622         }
 623     }
 624
 625     switch (cursorAction) {
 626     case MoveLeft:
 627         if (m_index > 0) {
 628             setActiveColumnIndex(m_index - 1);
 629         }
 630         break;
 631
 632     case MoveRight:
 633         if (m_index < m_columns.count() - 1) {
 634             setActiveColumnIndex(m_index + 1);
 635         }
 636         break;
 637
 638     default:
 639         break;
 640     }
 641
 642     return QModelIndex();
 643 }
 644
 645 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 646 {
 647     Q_UNUSED(rect);
 648     Q_UNUSED(flags);
 649     //activeColumn()->setSelection(rect, flags);
 650 }
 651
 652 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 653 {
 654     Q_UNUSED(selection);
 655     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 656 }
 657
 658 int DolphinColumnView::horizontalOffset() const
 659 {
 660     return -m_contentX;
 661 }
 662
 663 int DolphinColumnView::verticalOffset() const
 664 {
 665     return 0;
 666 }
 667
 668 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 669 {
 670     m_controller->triggerActivation();
 671     QAbstractItemView::mousePressEvent(event);
 672 }
 673
 674 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 675 {
 676     QAbstractItemView::resizeEvent(event);
 677     layoutColumns();
 678     updateScrollBar();
 679 }
 680
 681 void DolphinColumnView::zoomIn()
 682 {
 683     if (isZoomInPossible()) {
 684         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 685         // TODO: get rid of K3Icon sizes
 686         switch (settings->iconSize()) {
 687         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 688         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 689         default: Q_ASSERT(false); break;
 690         }
 691         updateDecorationSize();
 692     }
 693 }
 694
 695 void DolphinColumnView::zoomOut()
 696 {
 697     if (isZoomOutPossible()) {
 698         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 699         // TODO: get rid of K3Icon sizes
 700         switch (settings->iconSize()) {
 701         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 702         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 703         default: Q_ASSERT(false); break;
 704         }
 705         updateDecorationSize();
 706     }
 707 }
 708
 709 void DolphinColumnView::moveContentHorizontally(int x)
 710 {
 711     m_contentX = -x;
 712     layoutColumns();
 713 }
 714
 715 void DolphinColumnView::updateDecorationSize()
 716 {
 717     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 718     const int iconSize = settings->iconSize();
 719
 720     foreach (QObject* object, viewport()->children()) {
 721         if (object->inherits("QListView")) {
 722             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 723             widget->setDecorationSize(QSize(iconSize, iconSize));
 724         }
 725     }
 726
 727     m_controller->setZoomInPossible(isZoomInPossible());
 728     m_controller->setZoomOutPossible(isZoomOutPossible());
 729
 730     doItemsLayout();
 731 }
 732
 733 void DolphinColumnView::expandToActiveUrl()
 734 {
 735     const int lastIndex = m_columns.count() - 1;
 736     Q_ASSERT(lastIndex >= 0);
 737     const KUrl& activeUrl = m_columns[lastIndex]->url();
 738     const KUrl rootUrl = m_dolphinModel->dirLister()->url();
 739     if (rootUrl.isParentOf(activeUrl) && (rootUrl != activeUrl)) {
 740         m_dolphinModel->expandToUrl(activeUrl);
 741         reloadColumns();
 742     }
 743 }
 744
 745 void DolphinColumnView::triggerReloadColumns(const QModelIndex& index)
 746 {
 747     Q_UNUSED(index);
 748     // the reloading of the columns may not be done in the context of this slot
 749     QMetaObject::invokeMethod(this, "reloadColumns", Qt::QueuedConnection);
 750 }
 751
 752 void DolphinColumnView::reloadColumns()
 753 {
 754     const int end = m_columns.count() - 2; // next to last column
 755     for (int i = 0; i <= end; ++i) {
 756         ColumnWidget* nextColumn = m_columns[i + 1];
 757         const QModelIndex rootIndex = nextColumn->rootIndex();
 758         if (!rootIndex.isValid()) {
 759             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_columns[i]->childUrl());
 760             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 761             if (proxyIndex.isValid()) {
 762                 nextColumn->setRootIndex(proxyIndex);
 763                 nextColumn->show();
 764                 if (nextColumn->isActive() && m_restoreActiveColumnFocus) {
 765                     nextColumn->setFocus();
 766                     m_restoreActiveColumnFocus = false;
 767                 }
 768             }
 769         }
 770     }
 771 }
 772
 773 bool DolphinColumnView::isZoomInPossible() const
 774 {
 775     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 776     return settings->iconSize() < K3Icon::SizeLarge;
 777 }
 778
 779 bool DolphinColumnView::isZoomOutPossible() const
 780 {
 781     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 782     return settings->iconSize() > K3Icon::SizeSmall;
 783 }
 784
 785 void DolphinColumnView::setActiveColumnIndex(int index)
 786 {
 787     if (m_index == index) {
 788         return;
 789     }
 790
 791     const bool hasActiveColumn = (m_index >= 0);
 792     if (hasActiveColumn) {
 793         m_columns[m_index]->setActive(false);
 794     }
 795
 796     m_index = index;
 797     m_columns[m_index]->setActive(true);
 798
 799     m_controller->setUrl(m_columns[m_index]->url());
 800 }
 801
 802 void DolphinColumnView::layoutColumns()
 803 {
 804     int x = m_contentX;
 805     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 806     const int columnWidth = settings->columnWidth();
 807     foreach (ColumnWidget* column, m_columns) {
 808         column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 809         x += columnWidth;
 810     }
 811 }
 812
 813 void DolphinColumnView::updateScrollBar()
 814 {
 815     int contentWidth = 0;
 816     foreach (ColumnWidget* column, m_columns) {
 817         contentWidth += column->width();
 818     }
 819
 820     horizontalScrollBar()->setPageStep(contentWidth);
 821     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 822 }
 823
 824 void DolphinColumnView::assureVisibleActiveColumn()
 825 {
 826     const int viewportWidth = viewport()->width();
 827     const int x = activeColumn()->x();
 828     const int width = activeColumn()->width();
 829     if (x + width > viewportWidth) {
 830         int newContentX = m_contentX - x - width + viewportWidth;
 831         if (newContentX > 0) {
 832             newContentX = 0;
 833         }
 834         m_animation->setFrameRange(-m_contentX, -newContentX);
 835         m_animation->start();
 836     } else if (x < 0) {
 837         const int newContentX = m_contentX - x;
 838         m_animation->setFrameRange(-m_contentX, -newContentX);
 839         m_animation->start();
 840     }
 841 }
 842
 843 void DolphinColumnView::requestActivation(ColumnWidget* column)
 844 {
 845     if (column->isActive()) {
 846         assureVisibleActiveColumn();
 847     } else {
 848         int index = 0;
 849         foreach (ColumnWidget* currColumn, m_columns) {
 850             if (currColumn == column) {
 851                 setActiveColumnIndex(index);
 852                 assureVisibleActiveColumn();
 853                 return;
 854             }
 855             ++index;
 856         }
 857     }
 858 }
 859
 860 void DolphinColumnView::deleteInactiveChildColumns()
 861 {
 862     QList<ColumnWidget*>::iterator start = m_columns.begin() + m_index + 1;
 863     QList<ColumnWidget*>::iterator end = m_columns.end();
 864     for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 865         (*it)->deleteLater();
 866     }
 867     m_columns.erase(start, end);
 868 }
 869
 870 #include "dolphincolumnview.moc"