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     setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
 121     setSelectionBehavior(SelectItems);
 122     setSelectionMode(QAbstractItemView::ExtendedSelection);
 123     setDragDropMode(QAbstractItemView::DragDrop);
 124     setDropIndicatorShown(false);
 125     setFocusPolicy(Qt::NoFocus);
 126
 127     // apply the column mode settings to the widget
 128     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 129     Q_ASSERT(settings != 0);
 130
 131     m_viewOptions = QListView::viewOptions();
 132
 133     QFont font(settings->fontFamily(), settings->fontSize());
 134     font.setItalic(settings->italicFont());
 135     font.setBold(settings->boldFont());
 136     m_viewOptions.font = font;
 137
 138     const int iconSize = settings->iconSize();
 139     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 140
 141     KFileItemDelegate* delegate = new KFileItemDelegate(this);
 142     setItemDelegate(delegate);
 143
 144     activate();
 145
 146     connect(this, SIGNAL(entered(const QModelIndex&)),
 147             m_view->m_controller, SLOT(emitItemEntered(const QModelIndex&)));
 148     connect(this, SIGNAL(viewportEntered()),
 149             m_view->m_controller, SLOT(emitViewportEntered()));
 150 }
 151
 152 ColumnWidget::~ColumnWidget()
 153 {
 154 }
 155
 156 void ColumnWidget::setDecorationSize(const QSize& size)
 157 {
 158     m_viewOptions.decorationSize = size;
 159     doItemsLayout();
 160 }
 161
 162 void ColumnWidget::setActive(bool active)
 163 {
 164     if (m_active == active) {
 165         return;
 166     }
 167
 168     m_active = active;
 169
 170     if (active) {
 171         activate();
 172     } else {
 173         deactivate();
 174     }
 175 }
 176
 177 inline bool ColumnWidget::isActive() const
 178 {
 179     return m_active;
 180 }
 181
 182 inline void ColumnWidget::setChildUrl(const KUrl& url)
 183 {
 184     m_childUrl = url;
 185 }
 186
 187 inline const KUrl& ColumnWidget::childUrl() const
 188 {
 189     return m_childUrl;
 190 }
 191
 192 inline void ColumnWidget::setUrl(const KUrl& url)
 193 {
 194     m_url = url;
 195 }
 196
 197 const KUrl& ColumnWidget::url() const
 198 {
 199     return m_url;
 200 }
 201
 202 QStyleOptionViewItem ColumnWidget::viewOptions() const
 203 {
 204     return m_viewOptions;
 205 }
 206
 207 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 208 {
 209     if (event->mimeData()->hasUrls()) {
 210         event->acceptProposedAction();
 211     }
 212
 213     m_dragging = true;
 214 }
 215
 216 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 217 {
 218     QListView::dragLeaveEvent(event);
 219
 220     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 221     m_dragging = false;
 222     setDirtyRegion(m_dropRect);
 223 }
 224
 225 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 226 {
 227     QListView::dragMoveEvent(event);
 228
 229     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 230     const QModelIndex index = indexAt(event->pos());
 231     setDirtyRegion(m_dropRect);
 232     m_dropRect = visualRect(index);
 233     setDirtyRegion(m_dropRect);
 234 }
 235
 236 void ColumnWidget::dropEvent(QDropEvent* event)
 237 {
 238     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 239     if (!urls.isEmpty()) {
 240         event->acceptProposedAction();
 241         m_view->m_controller->indicateDroppedUrls(urls,
 242                                                   url(),
 243                                                   indexAt(event->pos()),
 244                                                   event->source());
 245     }
 246     QListView::dropEvent(event);
 247     m_dragging = false;
 248 }
 249
 250 void ColumnWidget::paintEvent(QPaintEvent* event)
 251 {
 252     if (!m_childUrl.isEmpty()) {
 253         // indicate the shown URL of the next column by highlighting the shown folder item
 254         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 255         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 256         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 257             const QRect itemRect = visualRect(proxyIndex);
 258             QPainter painter(viewport());
 259             painter.save();
 260
 261             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 262             color.setAlpha(32);
 263             painter.setPen(Qt::NoPen);
 264             painter.setBrush(color);
 265             painter.drawRect(itemRect);
 266
 267             painter.restore();
 268         }
 269     }
 270
 271     QListView::paintEvent(event);
 272
 273     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 274     if (m_dragging) {
 275         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 276         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 277     }
 278 }
 279
 280 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 281 {
 282     if (!m_active) {
 283         m_view->requestActivation(this);
 284     }
 285
 286     QListView::mousePressEvent(event);
 287 }
 288
 289 void ColumnWidget::keyPressEvent(QKeyEvent* event)
 290 {
 291     QListView::keyPressEvent(event);
 292
 293     const QItemSelectionModel* selModel = selectionModel();
 294     const QModelIndex currentIndex = selModel->currentIndex();
 295     const bool triggerItem = currentIndex.isValid()
 296                              && (event->key() == Qt::Key_Return)
 297                              && (selModel->selectedIndexes().count() <= 1);
 298     if (triggerItem) {
 299         m_view->m_controller->triggerItem(currentIndex);
 300     }
 301 }
 302
 303 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 304 {
 305     if (!m_active) {
 306         m_view->requestActivation(this);
 307     }
 308
 309     QListView::contextMenuEvent(event);
 310
 311     const QModelIndex index = indexAt(event->pos());
 312     if (index.isValid() || m_active) {
 313         // Only open a context menu above an item or if the mouse is above
 314         // the active column.
 315         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 316         m_view->m_controller->triggerContextMenuRequest(pos);
 317     }
 318 }
 319
 320 void ColumnWidget::selectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
 321 {
 322     QListView::selectionChanged(selected, deselected);
 323
 324     QItemSelectionModel* selModel = m_view->selectionModel();
 325     selModel->select(selected, QItemSelectionModel::Select);
 326     selModel->select(deselected, QItemSelectionModel::Deselect);
 327 }
 328
 329 void ColumnWidget::activate()
 330 {
 331     if (m_view->hasFocus()) {
 332         setFocus(Qt::OtherFocusReason);
 333     }
 334     m_view->setFocusProxy(this);
 335
 336     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 337     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 338     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 339     if (KGlobalSettings::singleClick()) {
 340         connect(this, SIGNAL(clicked(const QModelIndex&)),
 341                 m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 342     } else {
 343         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 344                 m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 345     }
 346
 347     const QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 348     QPalette palette = viewport()->palette();
 349     palette.setColor(viewport()->backgroundRole(), bgColor);
 350     viewport()->setPalette(palette);
 351
 352     if (!m_childUrl.isEmpty()) {
 353         // assure that the current index is set on the index that represents
 354         // the child URL
 355         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 356         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 357         selectionModel()->setCurrentIndex(proxyIndex, QItemSelectionModel::Current);
 358     }
 359
 360     update();
 361 }
 362
 363 void ColumnWidget::deactivate()
 364 {
 365     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 366     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 367     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 368     if (KGlobalSettings::singleClick()) {
 369         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 370                    m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 371     } else {
 372         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 373                    m_view->m_controller, SLOT(triggerItem(const QModelIndex&)));
 374     }
 375
 376     const QPalette palette = m_view->viewport()->palette();
 377     viewport()->setPalette(palette);
 378
 379     selectionModel()->clear();
 380     update();
 381 }
 382
 383 // ---
 384
 385 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 386     QAbstractItemView(parent),
 387     m_controller(controller),
 388     m_restoreActiveColumnFocus(false),
 389     m_index(-1),
 390     m_contentX(0),
 391     m_columns(),
 392     m_animation(0),
 393     m_dolphinModel(0),
 394     m_proxyModel(0)
 395 {
 396     Q_ASSERT(controller != 0);
 397
 398     setAcceptDrops(true);
 399     setDragDropMode(QAbstractItemView::DragDrop);
 400     setDropIndicatorShown(false);
 401     setSelectionMode(ExtendedSelection);
 402
 403     connect(this, SIGNAL(entered(const QModelIndex&)),
 404             controller, SLOT(emitItemEntered(const QModelIndex&)));
 405     connect(this, SIGNAL(viewportEntered()),
 406             controller, SLOT(emitViewportEntered()));
 407     connect(controller, SIGNAL(zoomIn()),
 408             this, SLOT(zoomIn()));
 409     connect(controller, SIGNAL(zoomOut()),
 410             this, SLOT(zoomOut()));
 411     connect(controller, SIGNAL(urlChanged(const KUrl&)),
 412             this, SLOT(showColumn(const KUrl&)));
 413
 414     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
 415             this, SLOT(moveContentHorizontally(int)));
 416
 417     ColumnWidget* column = new ColumnWidget(viewport(), this, m_controller->url());
 418     m_columns.append(column);
 419     setActiveColumnIndex(0);
 420
 421     updateDecorationSize();
 422
 423     m_animation = new QTimeLine(500, this);
 424     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
 425
 426     // dim the background of the viewport
 427     QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 428     const QColor fgColor = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 429     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 430
 431     QPalette palette = viewport()->palette();
 432     palette.setColor(viewport()->backgroundRole(), bgColor);
 433     viewport()->setPalette(palette);
 434 }
 435
 436 DolphinColumnView::~DolphinColumnView()
 437 {
 438 }
 439
 440 QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
 441 {
 442     foreach (ColumnWidget* column, m_columns) {
 443         const QPoint topLeft = column->frameGeometry().topLeft();
 444         const QPoint adjustedPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
 445         const QModelIndex index = column->indexAt(adjustedPoint);
 446         if (index.isValid()) {
 447             return index;
 448         }
 449     }
 450
 451     return QModelIndex();
 452 }
 453
 454 void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 455 {
 456     activeColumn()->scrollTo(index, hint);
 457 }
 458
 459 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 460 {
 461     return activeColumn()->visualRect(index);
 462 }
 463
 464 void DolphinColumnView::setModel(QAbstractItemModel* model)
 465 {
 466     if (m_dolphinModel != 0) {
 467         m_dolphinModel->disconnect(this);
 468     }
 469
 470     m_proxyModel = static_cast<QAbstractProxyModel*>(model);
 471     m_dolphinModel = static_cast<DolphinModel*>(m_proxyModel->sourceModel());
 472     connect(m_dolphinModel, SIGNAL(expand(const QModelIndex&)),
 473             this, SLOT(triggerReloadColumns(const QModelIndex&)));
 474
 475     activeColumn()->setModel(model);
 476     QAbstractItemView::setModel(model);
 477 }
 478
 479 void DolphinColumnView::reload()
 480 {
 481     // Due to the reloading of the model all columns will be reset to show
 482     // the same content as the first column. As this is not wanted, all columns
 483     // except of the first column are temporary hidden until the root index can
 484     // be updated again.
 485     m_restoreActiveColumnFocus = false;
 486     QList<ColumnWidget*>::iterator start = m_columns.begin() + 1;
 487     QList<ColumnWidget*>::iterator end = m_columns.end();
 488     for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 489         ColumnWidget* column = (*it);
 490         if (column->isActive() && column->hasFocus()) {
 491             // because of hiding the column, it will lose the focus
 492             // -> remember that the focus should be restored after reloading
 493             m_restoreActiveColumnFocus = true;
 494         }
 495         column->hide();
 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 clear all columns
 511         // and reset the root column
 512         QList<ColumnWidget*>::iterator start = m_columns.begin() + 1;
 513         QList<ColumnWidget*>::iterator end = m_columns.end();
 514         for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 515             (*it)->deleteLater();
 516         }
 517         m_columns.erase(start, end);
 518         m_index = 0;
 519         m_columns[0]->setActive(true);
 520         m_columns[0]->setUrl(url);
 521         assureVisibleActiveColumn();
 522         return;
 523     }
 524
 525     KDirLister* dirLister = m_dolphinModel->dirLister();
 526     const KUrl dirListerUrl = dirLister->url();
 527     if (dirListerUrl != rootUrl) {
 528         // It is possible that root URL of the directory lister is adjusted
 529         // after creating the column widget (e. g. when restoring the history
 530         // having a different root URL than the controller indicates).
 531         m_columns[0]->setUrl(dirListerUrl);
 532     }
 533
 534     int columnIndex = 0;
 535     foreach (ColumnWidget* column, m_columns) {
 536         if (column->url() == url) {
 537             // the column represents already the requested URL, hence activate it
 538             requestActivation(column);
 539             return;
 540         } else if (!column->url().isParentOf(url)) {
 541             // the column is no parent of the requested URL, hence
 542             // just delete all remaining columns
 543             if (columnIndex > 0) {
 544                 QList<ColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 545                 QList<ColumnWidget*>::iterator end = m_columns.end();
 546                 for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 547                     (*it)->deleteLater();
 548                 }
 549                 m_columns.erase(start, end);
 550
 551                 const int maxIndex = m_columns.count() - 1;
 552                 Q_ASSERT(maxIndex >= 0);
 553                 if (m_index > maxIndex) {
 554                     m_index = maxIndex;
 555                 }
 556                 break;
 557             }
 558         }
 559         ++columnIndex;
 560     }
 561
 562     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 563     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 564     // "c" will be created.
 565     const int lastIndex = m_columns.count() - 1;
 566     Q_ASSERT(lastIndex >= 0);
 567
 568     const KUrl& activeUrl = m_columns[lastIndex]->url();
 569     Q_ASSERT(activeUrl.isParentOf(url));
 570     Q_ASSERT(activeUrl != url);
 571
 572     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 573     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 574
 575     columnIndex = lastIndex;
 576     int slashIndex = path.count('/');
 577     bool hasSubPath = (slashIndex >= 0);
 578     while (hasSubPath) {
 579         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 580         if (subPath.isEmpty()) {
 581             hasSubPath = false;
 582         } else {
 583             path += subPath + '/';
 584             ++slashIndex;
 585
 586             const KUrl childUrl = KUrl(path);
 587             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(KUrl(path));
 588             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 589
 590             m_columns[columnIndex]->setChildUrl(childUrl);
 591             columnIndex++;
 592
 593             ColumnWidget* column = new ColumnWidget(viewport(), this, childUrl);
 594             column->setVerticalScrollMode(ColumnWidget::ScrollPerPixel);
 595             column->setHorizontalScrollMode(ColumnWidget::ScrollPerPixel);
 596             column->setModel(model());
 597             column->setRootIndex(proxyIndex);
 598             column->setActive(false);
 599
 600             m_columns.append(column);
 601
 602             // Before invoking layoutColumns() the column must be set visible temporary.
 603             // To prevent a flickering the initial geometry is set to a hidden position.
 604             column->setGeometry(QRect(-1, -1, 1, 1));
 605             column->show();
 606             layoutColumns();
 607             updateScrollBar();
 608
 609             // the layout is finished, now let the column be invisible until it
 610             // gets a valid root index due to expandToActiveUrl()
 611             column->hide();
 612         }
 613     }
 614
 615     // set the last column as active column without modifying the controller
 616     // and hence the history
 617     activeColumn()->setActive(false);
 618     m_index = columnIndex;
 619     activeColumn()->setActive(true);
 620
 621     expandToActiveUrl();
 622 }
 623
 624 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 625 {
 626     Q_UNUSED(index);
 627     return false;//activeColumn()->isIndexHidden(index);
 628 }
 629
 630 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 631 {
 632     // Parts of this code have been taken from QColumnView::moveCursor().
 633     // Copyright (C) 1992-2007 Trolltech ASA.
 634
 635     Q_UNUSED(modifiers);
 636     if (model() == 0) {
 637         return QModelIndex();
 638     }
 639
 640     const QModelIndex current = currentIndex();
 641     if (isRightToLeft()) {
 642         if (cursorAction == MoveLeft) {
 643             cursorAction = MoveRight;
 644         } else if (cursorAction == MoveRight) {
 645             cursorAction = MoveLeft;
 646         }
 647     }
 648
 649     switch (cursorAction) {
 650     case MoveLeft:
 651         if (m_index > 0) {
 652             setActiveColumnIndex(m_index - 1);
 653         }
 654         break;
 655
 656     case MoveRight:
 657         if (m_index < m_columns.count() - 1) {
 658             setActiveColumnIndex(m_index + 1);
 659         }
 660         break;
 661
 662     default:
 663         break;
 664     }
 665
 666     return QModelIndex();
 667 }
 668
 669 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 670 {
 671     Q_UNUSED(rect);
 672     Q_UNUSED(flags);
 673     //activeColumn()->setSelection(rect, flags);
 674 }
 675
 676 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 677 {
 678     Q_UNUSED(selection);
 679     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 680 }
 681
 682 int DolphinColumnView::horizontalOffset() const
 683 {
 684     return -m_contentX;
 685 }
 686
 687 int DolphinColumnView::verticalOffset() const
 688 {
 689     return 0;
 690 }
 691
 692 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 693 {
 694     m_controller->triggerActivation();
 695     QAbstractItemView::mousePressEvent(event);
 696 }
 697
 698 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 699 {
 700     QAbstractItemView::resizeEvent(event);
 701     layoutColumns();
 702     updateScrollBar();
 703 }
 704
 705 void DolphinColumnView::zoomIn()
 706 {
 707     if (isZoomInPossible()) {
 708         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 709         // TODO: get rid of K3Icon sizes
 710         switch (settings->iconSize()) {
 711         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 712         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 713         default: Q_ASSERT(false); break;
 714         }
 715         updateDecorationSize();
 716     }
 717 }
 718
 719 void DolphinColumnView::zoomOut()
 720 {
 721     if (isZoomOutPossible()) {
 722         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 723         // TODO: get rid of K3Icon sizes
 724         switch (settings->iconSize()) {
 725         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 726         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 727         default: Q_ASSERT(false); break;
 728         }
 729         updateDecorationSize();
 730     }
 731 }
 732
 733 void DolphinColumnView::moveContentHorizontally(int x)
 734 {
 735     m_contentX = -x;
 736     layoutColumns();
 737 }
 738
 739 void DolphinColumnView::updateDecorationSize()
 740 {
 741     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 742     const int iconSize = settings->iconSize();
 743
 744     foreach (QObject* object, viewport()->children()) {
 745         if (object->inherits("QListView")) {
 746             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 747             widget->setDecorationSize(QSize(iconSize, iconSize));
 748         }
 749     }
 750
 751     m_controller->setZoomInPossible(isZoomInPossible());
 752     m_controller->setZoomOutPossible(isZoomOutPossible());
 753
 754     doItemsLayout();
 755 }
 756
 757 void DolphinColumnView::expandToActiveUrl()
 758 {
 759     const int lastIndex = m_columns.count() - 1;
 760     Q_ASSERT(lastIndex >= 0);
 761     const KUrl& activeUrl = m_columns[lastIndex]->url();
 762     const KUrl rootUrl = m_dolphinModel->dirLister()->url();
 763     const bool expand = rootUrl.isParentOf(activeUrl)
 764                         && !rootUrl.equals(activeUrl, KUrl::CompareWithoutTrailingSlash);
 765     if (expand) {
 766         m_dolphinModel->expandToUrl(activeUrl);
 767         reloadColumns();
 768     }
 769 }
 770
 771 void DolphinColumnView::triggerReloadColumns(const QModelIndex& index)
 772 {
 773     Q_UNUSED(index);
 774     // the reloading of the columns may not be done in the context of this slot
 775     QMetaObject::invokeMethod(this, "reloadColumns", Qt::QueuedConnection);
 776 }
 777
 778 void DolphinColumnView::reloadColumns()
 779 {
 780     const int end = m_columns.count() - 2; // next to last column
 781     for (int i = 0; i <= end; ++i) {
 782         ColumnWidget* nextColumn = m_columns[i + 1];
 783
 784         KDirLister* dirLister = m_dolphinModel->dirLister();
 785         dirLister->updateDirectory(nextColumn->url());
 786
 787         const QModelIndex rootIndex = nextColumn->rootIndex();
 788         if (rootIndex.isValid()) {
 789             nextColumn->show();
 790         } else {
 791             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_columns[i]->childUrl());
 792             const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 793             if (proxyIndex.isValid()) {
 794                 nextColumn->setRootIndex(proxyIndex);
 795                 nextColumn->show();
 796                 if (nextColumn->isActive() && m_restoreActiveColumnFocus) {
 797                     nextColumn->setFocus();
 798                     m_restoreActiveColumnFocus = false;
 799                 }
 800             }
 801         }
 802     }
 803     assureVisibleActiveColumn();
 804 }
 805
 806 bool DolphinColumnView::isZoomInPossible() const
 807 {
 808     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 809     return settings->iconSize() < K3Icon::SizeLarge;
 810 }
 811
 812 bool DolphinColumnView::isZoomOutPossible() const
 813 {
 814     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 815     return settings->iconSize() > K3Icon::SizeSmall;
 816 }
 817
 818 void DolphinColumnView::setActiveColumnIndex(int index)
 819 {
 820     if (m_index == index) {
 821         return;
 822     }
 823
 824     const bool hasActiveColumn = (m_index >= 0);
 825     if (hasActiveColumn) {
 826         m_columns[m_index]->setActive(false);
 827     }
 828
 829     m_index = index;
 830     m_columns[m_index]->setActive(true);
 831
 832     m_controller->setUrl(m_columns[m_index]->url());
 833 }
 834
 835 void DolphinColumnView::layoutColumns()
 836 {
 837     int x = m_contentX;
 838     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 839     const int columnWidth = settings->columnWidth();
 840     foreach (ColumnWidget* column, m_columns) {
 841         column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 842         x += columnWidth;
 843     }
 844 }
 845
 846 void DolphinColumnView::updateScrollBar()
 847 {
 848     int contentWidth = 0;
 849     foreach (ColumnWidget* column, m_columns) {
 850         contentWidth += column->width();
 851     }
 852
 853     horizontalScrollBar()->setPageStep(contentWidth);
 854     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 855 }
 856
 857 void DolphinColumnView::assureVisibleActiveColumn()
 858 {
 859     const int viewportWidth = viewport()->width();
 860     const int x = activeColumn()->x();
 861     const int width = activeColumn()->width();
 862     if (x + width > viewportWidth) {
 863         int newContentX = m_contentX - x - width + viewportWidth;
 864         if (newContentX > 0) {
 865             newContentX = 0;
 866         }
 867         m_animation->setFrameRange(-m_contentX, -newContentX);
 868         m_animation->start();
 869     } else if (x < 0) {
 870         const int newContentX = m_contentX - x;
 871         m_animation->setFrameRange(-m_contentX, -newContentX);
 872         m_animation->start();
 873     }
 874 }
 875
 876 void DolphinColumnView::requestActivation(ColumnWidget* column)
 877 {
 878     if (column->isActive()) {
 879         assureVisibleActiveColumn();
 880     } else {
 881         int index = 0;
 882         foreach (ColumnWidget* currColumn, m_columns) {
 883             if (currColumn == column) {
 884                 setActiveColumnIndex(index);
 885                 assureVisibleActiveColumn();
 886                 return;
 887             }
 888             ++index;
 889         }
 890     }
 891 }
 892
 893 #include "dolphincolumnview.moc"