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     inline 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     inline void setChildUrl(const KUrl& url);
  67     inline const KUrl& childUrl() const;
  68
  69     /**
  70      * Returns the directory URL that is shown inside the column widget.
  71      */
  72     inline const KUrl& url() const;
  73
  74 protected:
  75     virtual QStyleOptionViewItem viewOptions() const;
  76     virtual void dragEnterEvent(QDragEnterEvent* event);
  77     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  78     virtual void dragMoveEvent(QDragMoveEvent* event);
  79     virtual void dropEvent(QDropEvent* event);
  80     virtual void paintEvent(QPaintEvent* event);
  81     virtual void mousePressEvent(QMouseEvent* event);
  82     virtual void keyPressEvent(QKeyEvent* event);
  83     virtual void contextMenuEvent(QContextMenuEvent* event);
  84     virtual void selectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
  85
  86 private:
  87     /** Used by ColumnWidget::setActive(). */
  88     void activate();
  89
  90     /** Used by ColumnWidget::setActive(). */
  91     void deactivate();
  92
  93 private:
  94     bool m_active;
  95     DolphinColumnView* m_view;
  96     KUrl m_url;      // URL of the directory that is shown
  97     KUrl m_childUrl; // URL of the next column that is shown
  98     QStyleOptionViewItem m_viewOptions;
  99
 100     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 101     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
 102 };
 103
 104 ColumnWidget::ColumnWidget(QWidget* parent,
 105                            DolphinColumnView* columnView,
 106                            const KUrl& url) :
 107     QListView(parent),
 108     m_active(true),
 109     m_view(columnView),
 110     m_url(url),
 111     m_childUrl(),
 112     m_dragging(false),
 113     m_dropRect()
 114 {
 115     setMouseTracking(true);
 116     viewport()->setAttribute(Qt::WA_Hover);
 117     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 118     setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 119     setSelectionBehavior(SelectItems);
 120     setSelectionMode(QAbstractItemView::ExtendedSelection);
 121     setDragDropMode(QAbstractItemView::DragDrop);
 122     setDropIndicatorShown(false);
 123     setFocusPolicy(Qt::NoFocus);
 124
 125     // apply the column mode settings to the widget
 126     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 127     Q_ASSERT(settings != 0);
 128
 129     m_viewOptions = QListView::viewOptions();
 130
 131     QFont font(settings->fontFamily(), settings->fontSize());
 132     font.setItalic(settings->italicFont());
 133     font.setBold(settings->boldFont());
 134     m_viewOptions.font = font;
 135
 136     const int iconSize = settings->iconSize();
 137     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 138
 139     KFileItemDelegate* delegate = new KFileItemDelegate(this);
 140     setItemDelegate(delegate);
 141
 142     activate();
 143
 144     connect(this, SIGNAL(entered(const QModelIndex&)),
 145             m_view->m_controller, SLOT(emitItemEntered(const QModelIndex&)));
 146     connect(this, SIGNAL(viewportEntered()),
 147             m_view->m_controller, SLOT(emitViewportEntered()));
 148 }
 149
 150 ColumnWidget::~ColumnWidget()
 151 {
 152 }
 153
 154 void ColumnWidget::setDecorationSize(const QSize& size)
 155 {
 156     m_viewOptions.decorationSize = size;
 157     doItemsLayout();
 158 }
 159
 160 void ColumnWidget::setActive(bool active)
 161 {
 162     if (m_active == active) {
 163         return;
 164     }
 165
 166     m_active = active;
 167
 168     if (active) {
 169         activate();
 170     } else {
 171         deactivate();
 172     }
 173 }
 174
 175 inline bool ColumnWidget::isActive() const
 176 {
 177     return m_active;
 178 }
 179
 180 inline void ColumnWidget::setChildUrl(const KUrl& url)
 181 {
 182     m_childUrl = url;
 183 }
 184
 185 inline const KUrl& ColumnWidget::childUrl() const
 186 {
 187     return m_childUrl;
 188 }
 189
 190 const KUrl& ColumnWidget::url() const
 191 {
 192     return m_url;
 193 }
 194
 195 QStyleOptionViewItem ColumnWidget::viewOptions() const
 196 {
 197     return m_viewOptions;
 198 }
 199
 200 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 201 {
 202     if (event->mimeData()->hasUrls()) {
 203         event->acceptProposedAction();
 204     }
 205
 206     m_dragging = true;
 207 }
 208
 209 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 210 {
 211     QListView::dragLeaveEvent(event);
 212
 213     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 214     m_dragging = false;
 215     setDirtyRegion(m_dropRect);
 216 }
 217
 218 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 219 {
 220     QListView::dragMoveEvent(event);
 221
 222     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 223     const QModelIndex index = indexAt(event->pos());
 224     setDirtyRegion(m_dropRect);
 225     m_dropRect = visualRect(index);
 226     setDirtyRegion(m_dropRect);
 227 }
 228
 229 void ColumnWidget::dropEvent(QDropEvent* event)
 230 {
 231     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 232     if (!urls.isEmpty()) {
 233         event->acceptProposedAction();
 234         m_view->m_controller->indicateDroppedUrls(urls,
 235                                                   url(),
 236                                                   indexAt(event->pos()),
 237                                                   event->source());
 238     }
 239     QListView::dropEvent(event);
 240     m_dragging = false;
 241 }
 242
 243 void ColumnWidget::paintEvent(QPaintEvent* event)
 244 {
 245     if (!m_childUrl.isEmpty()) {
 246         // indicate the shown URL of the next column by highlighting the shown folder item
 247         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 248         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 249         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 250             const QRect itemRect = visualRect(proxyIndex);
 251             QPainter painter(viewport());
 252             painter.save();
 253
 254             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 255             color.setAlpha(32);
 256             painter.setPen(Qt::NoPen);
 257             painter.setBrush(color);
 258             painter.drawRect(itemRect);
 259
 260             painter.restore();
 261         }
 262     }
 263
 264     QListView::paintEvent(event);
 265
 266     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 267     if (m_dragging) {
 268         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 269         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 270     }
 271 }
 272
 273 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 274 {
 275     if (!m_active) {
 276         m_view->requestActivation(this);
 277     }
 278
 279     QListView::mousePressEvent(event);
 280 }
 281
 282 void ColumnWidget::keyPressEvent(QKeyEvent* event)
 283 {
 284     QListView::keyPressEvent(event);
 285
 286     const QItemSelectionModel* selModel = selectionModel();
 287     const QModelIndex currentIndex = selModel->currentIndex();
 288     const bool triggerItem = currentIndex.isValid()
 289                              && (event->key() == Qt::Key_Return)
 290                              && (selModel->selectedIndexes().count() <= 1);
 291     if (triggerItem) {
 292         m_view->triggerItem(currentIndex);
 293     }
 294 }
 295
 296 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 297 {
 298     if (!m_active) {
 299         m_view->requestActivation(this);
 300     }
 301
 302     QListView::contextMenuEvent(event);
 303
 304     const QModelIndex index = indexAt(event->pos());
 305     if (index.isValid() || m_active) {
 306         // Only open a context menu above an item or if the mouse is above
 307         // the active column.
 308         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 309         m_view->m_controller->triggerContextMenuRequest(pos);
 310     }
 311 }
 312
 313 void ColumnWidget::selectionChanged(const QItemSelection& selected, const QItemSelection& deselected)
 314 {
 315     QListView::selectionChanged(selected, deselected);
 316
 317     QItemSelectionModel* selModel = m_view->selectionModel();
 318     selModel->select(selected, QItemSelectionModel::Select);
 319     selModel->select(deselected, QItemSelectionModel::Deselect);
 320 }
 321
 322 void ColumnWidget::activate()
 323 {
 324     if (m_view->hasFocus()) {
 325         setFocus(Qt::OtherFocusReason);
 326     }
 327     m_view->setFocusProxy(this);
 328
 329     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 330     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 331     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 332     if (KGlobalSettings::singleClick()) {
 333         connect(this, SIGNAL(clicked(const QModelIndex&)),
 334                 m_view, SLOT(triggerItem(const QModelIndex&)));
 335     } else {
 336         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 337                 m_view, SLOT(triggerItem(const QModelIndex&)));
 338     }
 339
 340     const QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 341     QPalette palette = viewport()->palette();
 342     palette.setColor(viewport()->backgroundRole(), bgColor);
 343     viewport()->setPalette(palette);
 344
 345     if (!m_childUrl.isEmpty()) {
 346         // assure that the current index is set on the index that represents
 347         // the child URL
 348         const QModelIndex dirIndex = m_view->m_dolphinModel->indexForUrl(m_childUrl);
 349         const QModelIndex proxyIndex = m_view->m_proxyModel->mapFromSource(dirIndex);
 350         selectionModel()->setCurrentIndex(proxyIndex, QItemSelectionModel::Current);
 351     }
 352
 353     update();
 354 }
 355
 356 void ColumnWidget::deactivate()
 357 {
 358     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
 359     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
 360     // necessary connecting the signal 'singleClick()' or 'doubleClick'.
 361     if (KGlobalSettings::singleClick()) {
 362         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 363                    m_view, SLOT(triggerItem(const QModelIndex&)));
 364     } else {
 365         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 366                    m_view, SLOT(triggerItem(const QModelIndex&)));
 367     }
 368
 369     QColor bgColor = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 370     const QColor fgColor = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 371     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 372
 373     QPalette palette = viewport()->palette();
 374     palette.setColor(viewport()->backgroundRole(), bgColor);
 375     viewport()->setPalette(palette);
 376
 377     selectionModel()->clear();
 378
 379     update();
 380 }
 381
 382 // ---
 383
 384 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 385     QAbstractItemView(parent),
 386     m_controller(controller),
 387     m_index(-1),
 388     m_contentX(0),
 389     m_columns(),
 390     m_animation(0),
 391     m_dolphinModel(0),
 392     m_proxyModel(0)
 393 {
 394     Q_ASSERT(controller != 0);
 395
 396     setAcceptDrops(true);
 397     setDragDropMode(QAbstractItemView::DragDrop);
 398     setDropIndicatorShown(false);
 399     setSelectionMode(ExtendedSelection);
 400
 401     connect(this, SIGNAL(entered(const QModelIndex&)),
 402             controller, SLOT(emitItemEntered(const QModelIndex&)));
 403     connect(this, SIGNAL(viewportEntered()),
 404             controller, SLOT(emitViewportEntered()));
 405     connect(controller, SIGNAL(zoomIn()),
 406             this, SLOT(zoomIn()));
 407     connect(controller, SIGNAL(zoomOut()),
 408             this, SLOT(zoomOut()));
 409     connect(controller, SIGNAL(urlChanged(const KUrl&)),
 410             this, SLOT(showColumn(const KUrl&)));
 411
 412     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
 413             this, SLOT(moveContentHorizontally(int)));
 414
 415     ColumnWidget* column = new ColumnWidget(viewport(), this, m_controller->url());
 416     m_columns.append(column);
 417     setActiveColumnIndex(0);
 418
 419     updateDecorationSize();
 420
 421     m_animation = new QTimeLine(500, this);
 422     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
 423 }
 424
 425 DolphinColumnView::~DolphinColumnView()
 426 {
 427 }
 428
 429 QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
 430 {
 431     foreach (ColumnWidget* column, m_columns) {
 432         const QPoint topLeft = column->frameGeometry().topLeft();
 433         const QPoint adjustedPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
 434         const QModelIndex index = column->indexAt(adjustedPoint);
 435         if (index.isValid()) {
 436             return index;
 437         }
 438     }
 439
 440     return QModelIndex();
 441 }
 442
 443 void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 444 {
 445     activeColumn()->scrollTo(index, hint);
 446 }
 447
 448 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 449 {
 450     return activeColumn()->visualRect(index);
 451 }
 452
 453 void DolphinColumnView::setModel(QAbstractItemModel* model)
 454 {
 455     m_proxyModel = static_cast<const QAbstractProxyModel*>(model);
 456     m_dolphinModel = static_cast<const DolphinModel*>(m_proxyModel->sourceModel());
 457
 458     activeColumn()->setModel(model);
 459     QAbstractItemView::setModel(model);
 460 }
 461
 462 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 463 {
 464     Q_UNUSED(index);
 465     return false;//activeColumn()->isIndexHidden(index);
 466 }
 467
 468 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 469 {
 470     // Parts of this code have been taken from QColumnView::moveCursor().
 471     // Copyright (C) 1992-2007 Trolltech ASA.
 472
 473     Q_UNUSED(modifiers);
 474     if (model() == 0) {
 475         return QModelIndex();
 476     }
 477
 478     const QModelIndex current = currentIndex();
 479     if (isRightToLeft()) {
 480         if (cursorAction == MoveLeft) {
 481             cursorAction = MoveRight;
 482         } else if (cursorAction == MoveRight) {
 483             cursorAction = MoveLeft;
 484         }
 485     }
 486
 487     switch (cursorAction) {
 488     case MoveLeft:
 489         if (m_index > 0) {
 490             setActiveColumnIndex(m_index - 1);
 491         }
 492         break;
 493
 494     case MoveRight:
 495         if (m_index < m_columns.count() - 1) {
 496             setActiveColumnIndex(m_index + 1);
 497         }
 498         break;
 499
 500     default:
 501         break;
 502     }
 503
 504     return QModelIndex();
 505 }
 506
 507 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 508 {
 509     Q_UNUSED(rect);
 510     Q_UNUSED(flags);
 511     //activeColumn()->setSelection(rect, flags);
 512 }
 513
 514 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 515 {
 516     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 517 }
 518
 519 int DolphinColumnView::horizontalOffset() const
 520 {
 521     return -m_contentX;
 522 }
 523
 524 int DolphinColumnView::verticalOffset() const
 525 {
 526     return 0;
 527 }
 528
 529 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 530 {
 531     m_controller->triggerActivation();
 532     QAbstractItemView::mousePressEvent(event);
 533 }
 534
 535 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 536 {
 537     QAbstractItemView::resizeEvent(event);
 538     layoutColumns();
 539     updateScrollBar();
 540 }
 541
 542 void DolphinColumnView::zoomIn()
 543 {
 544     if (isZoomInPossible()) {
 545         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 546         // TODO: get rid of K3Icon sizes
 547         switch (settings->iconSize()) {
 548         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 549         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 550         default: Q_ASSERT(false); break;
 551         }
 552         updateDecorationSize();
 553     }
 554 }
 555
 556 void DolphinColumnView::zoomOut()
 557 {
 558     if (isZoomOutPossible()) {
 559         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 560         // TODO: get rid of K3Icon sizes
 561         switch (settings->iconSize()) {
 562         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 563         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 564         default: Q_ASSERT(false); break;
 565         }
 566         updateDecorationSize();
 567     }
 568 }
 569
 570 void DolphinColumnView::triggerItem(const QModelIndex& index)
 571 {
 572     m_controller->triggerItem(index);
 573
 574     const Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
 575     if ((modifiers & Qt::ControlModifier) || (modifiers & Qt::ShiftModifier)) {
 576         return;
 577     }
 578
 579     const KFileItem item = m_dolphinModel->itemForIndex(m_proxyModel->mapToSource(index));
 580     if ((item.url() != activeColumn()->url()) && item.isDir()) {
 581         deleteInactiveChildColumns();
 582
 583         const KUrl& childUrl = m_controller->url();
 584         activeColumn()->setChildUrl(childUrl);
 585
 586         ColumnWidget* column = new ColumnWidget(viewport(), this, childUrl);
 587         column->setModel(model());
 588         column->setRootIndex(index);
 589
 590         m_columns.append(column);
 591
 592         setActiveColumnIndex(m_index + 1);
 593
 594         // Before invoking layoutColumns() the column must be shown. To prevent
 595         // a flickering the initial geometry is set to be invisible.
 596         column->setGeometry(QRect(-1, -1, 1, 1));
 597         column->show();
 598
 599         layoutColumns();
 600         updateScrollBar();
 601         assureVisibleActiveColumn();
 602     }
 603 }
 604
 605 void DolphinColumnView::moveContentHorizontally(int x)
 606 {
 607     m_contentX = -x;
 608     layoutColumns();
 609 }
 610
 611 void DolphinColumnView::showColumn(const KUrl& url)
 612 {
 613     if (!m_columns[0]->url().isParentOf(url)) {
 614         // the URL is no child URL of the column view, hence do nothing
 615         return;
 616     }
 617
 618     int columnIndex = 0;
 619     foreach (ColumnWidget* column, m_columns) {
 620         if (column->url() == url) {
 621             // the column represents already the requested URL, hence activate it
 622             requestActivation(column);
 623             return;
 624         } else if (!column->url().isParentOf(url)) {
 625             // the column is no parent of the requested URL, hence it must
 626             // be deleted and a new column must be loaded
 627             if (columnIndex > 0) {
 628                 setActiveColumnIndex(columnIndex - 1);
 629                 deleteInactiveChildColumns();
 630             }
 631
 632             const QModelIndex dirIndex = m_dolphinModel->indexForUrl(url);
 633             if (dirIndex.isValid()) {
 634                 triggerItem(m_proxyModel->mapFromSource(dirIndex));
 635             }
 636             return;
 637         }
 638         ++columnIndex;
 639     }
 640
 641     // no existing column has been replaced and a new column must be created
 642     const QModelIndex dirIndex = m_dolphinModel->indexForUrl(url);
 643     if (dirIndex.isValid()) {
 644         triggerItem(m_proxyModel->mapFromSource(dirIndex));
 645     }
 646 }
 647
 648 void DolphinColumnView::updateDecorationSize()
 649 {
 650     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 651     const int iconSize = settings->iconSize();
 652
 653     foreach (QObject* object, viewport()->children()) {
 654         if (object->inherits("QListView")) {
 655             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 656             widget->setDecorationSize(QSize(iconSize, iconSize));
 657         }
 658     }
 659
 660     m_controller->setZoomInPossible(isZoomInPossible());
 661     m_controller->setZoomOutPossible(isZoomOutPossible());
 662
 663     doItemsLayout();
 664 }
 665
 666 bool DolphinColumnView::isZoomInPossible() const
 667 {
 668     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 669     return settings->iconSize() < K3Icon::SizeLarge;
 670 }
 671
 672 bool DolphinColumnView::isZoomOutPossible() const
 673 {
 674     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 675     return settings->iconSize() > K3Icon::SizeSmall;
 676 }
 677
 678 void DolphinColumnView::setActiveColumnIndex(int index)
 679 {
 680     if (m_index == index) {
 681         return;
 682     }
 683
 684     const bool hasActiveColumn = (m_index >= 0);
 685     if (hasActiveColumn) {
 686         m_columns[m_index]->setActive(false);
 687     }
 688
 689     m_index = index;
 690     m_columns[m_index]->setActive(true);
 691
 692     m_controller->setUrl(m_columns[m_index]->url());
 693 }
 694
 695 void DolphinColumnView::layoutColumns()
 696 {
 697     int x = m_contentX;
 698     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 699     const int columnWidth = settings->columnWidth();
 700     foreach (ColumnWidget* column, m_columns) {
 701         column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 702         x += columnWidth;
 703     }
 704 }
 705
 706 void DolphinColumnView::updateScrollBar()
 707 {
 708     int contentWidth = 0;
 709     foreach (ColumnWidget* column, m_columns) {
 710         contentWidth += column->width();
 711     }
 712
 713     horizontalScrollBar()->setPageStep(contentWidth);
 714     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 715 }
 716
 717 void DolphinColumnView::assureVisibleActiveColumn()
 718 {
 719     const int viewportWidth = viewport()->width();
 720     const int x = activeColumn()->x();
 721     const int width = activeColumn()->width();
 722     if (x + width > viewportWidth) {
 723         int newContentX = m_contentX - x - width + viewportWidth;
 724         if (newContentX > 0) {
 725             newContentX = 0;
 726         }
 727         m_animation->setFrameRange(-m_contentX, -newContentX);
 728         m_animation->start();
 729     } else if (x < 0) {
 730         const int newContentX = m_contentX - x;
 731         m_animation->setFrameRange(-m_contentX, -newContentX);
 732         m_animation->start();
 733     }
 734 }
 735
 736 void DolphinColumnView::requestActivation(ColumnWidget* column)
 737 {
 738     if (column->isActive()) {
 739         assureVisibleActiveColumn();
 740     } else {
 741         int index = 0;
 742         foreach (ColumnWidget* currColumn, m_columns) {
 743             if (currColumn == column) {
 744                 setActiveColumnIndex(index);
 745                 assureVisibleActiveColumn();
 746                 return;
 747             }
 748             ++index;
 749         }
 750     }
 751 }
 752
 753 void DolphinColumnView::deleteInactiveChildColumns()
 754 {
 755     QList<ColumnWidget*>::iterator start = m_columns.begin() + m_index + 1;
 756     QList<ColumnWidget*>::iterator end = m_columns.end();
 757     for (QList<ColumnWidget*>::iterator it = start; it != end; ++it) {
 758         (*it)->deleteLater();
 759     }
 760     m_columns.erase(start, end);
 761 }
 762
 763 #include "dolphincolumnview.moc"