apps/dolphin/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 "dolphincolumnwidget.h"
  23 #include "dolphincontroller.h"
  24 #include "dolphinsettings.h"
  25
  26 #include "dolphin_columnmodesettings.h"
  27
  28 #include <QPoint>
  29 #include <QScrollBar>
  30 #include <QTimeLine>
  31
  32 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
  33     QAbstractItemView(parent),
  34     m_controller(controller),
  35     m_active(false),
  36     m_index(-1),
  37     m_contentX(0),
  38     m_columns(),
  39     m_emptyViewport(0),
  40     m_animation(0),
  41     m_nameFilter()
  42 {
  43     Q_ASSERT(controller != 0);
  44
  45     setAcceptDrops(true);
  46     setDragDropMode(QAbstractItemView::DragDrop);
  47     setDropIndicatorShown(false);
  48     setSelectionMode(ExtendedSelection);
  49     setFocusPolicy(Qt::NoFocus);
  50     setFrameShape(QFrame::NoFrame);
  51
  52     connect(this, SIGNAL(viewportEntered()),
  53             controller, SLOT(emitViewportEntered()));
  54     connect(controller, SIGNAL(zoomIn()),
  55             this, SLOT(zoomIn()));
  56     connect(controller, SIGNAL(zoomOut()),
  57             this, SLOT(zoomOut()));
  58     connect(controller, SIGNAL(activationChanged(bool)),
  59             this, SLOT(updateColumnsBackground(bool)));
  60
  61     const DolphinView* view = controller->dolphinView();
  62     connect(view, SIGNAL(sortingChanged(DolphinView::Sorting)),
  63             this, SLOT(slotSortingChanged(DolphinView::Sorting)));
  64     connect(view, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  65             this, SLOT(slotSortOrderChanged(Qt::SortOrder)));
  66     connect(view, SIGNAL(showHiddenFilesChanged()),
  67             this, SLOT(slotShowHiddenFilesChanged()));
  68     connect(view, SIGNAL(showPreviewChanged()),
  69             this, SLOT(slotShowPreviewChanged()));
  70
  71     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
  72             this, SLOT(moveContentHorizontally(int)));
  73
  74     m_animation = new QTimeLine(500, this);
  75     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
  76
  77     DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, m_controller->url());
  78     m_columns.append(column);
  79     setActiveColumnIndex(0);
  80
  81     m_emptyViewport = new QFrame(viewport());
  82     m_emptyViewport->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
  83
  84     updateDecorationSize();
  85     updateColumnsBackground(true);
  86 }
  87
  88 DolphinColumnView::~DolphinColumnView()
  89 {
  90 }
  91
  92 QModelIndex DolphinColumnView::indexAt(const QPoint& point) const
  93 {
  94     foreach (DolphinColumnWidget* column, m_columns) {
  95         const QPoint topLeft = column->frameGeometry().topLeft();
  96         const QPoint adjustedPoint(point.x() - topLeft.x(), point.y() - topLeft.y());
  97         const QModelIndex index = column->indexAt(adjustedPoint);
  98         if (index.isValid()) {
  99             return index;
 100         }
 101     }
 102
 103     return QModelIndex();
 104 }
 105
 106 void DolphinColumnView::scrollTo(const QModelIndex& index, ScrollHint hint)
 107 {
 108     activeColumn()->scrollTo(index, hint);
 109 }
 110
 111 QRect DolphinColumnView::visualRect(const QModelIndex& index) const
 112 {
 113     return activeColumn()->visualRect(index);
 114 }
 115
 116 void DolphinColumnView::invertSelection()
 117 {
 118     QItemSelectionModel* selectionModel = activeColumn()->selectionModel();
 119     const QAbstractItemModel* itemModel = selectionModel->model();
 120
 121     const QModelIndex topLeft = itemModel->index(0, 0);
 122     const QModelIndex bottomRight = itemModel->index(itemModel->rowCount() - 1,
 123                                                      itemModel->columnCount() - 1);
 124
 125     const QItemSelection selection(topLeft, bottomRight);
 126     selectionModel->select(selection, QItemSelectionModel::Toggle);
 127 }
 128
 129 void DolphinColumnView::reload()
 130 {
 131     foreach (DolphinColumnWidget* column, m_columns) {
 132         column->reload();
 133     }
 134 }
 135
 136 void DolphinColumnView::setRootUrl(const KUrl& url)
 137 {
 138     removeAllColumns();
 139     m_columns[0]->setUrl(url);
 140 }
 141
 142 void DolphinColumnView::setNameFilter(const QString& nameFilter)
 143 {
 144     if (nameFilter != m_nameFilter) {
 145         m_nameFilter = nameFilter;
 146         foreach (DolphinColumnWidget* column, m_columns) {
 147             column->setNameFilter(nameFilter);
 148         }
 149     }
 150 }
 151
 152 QString DolphinColumnView::nameFilter() const
 153 {
 154     return m_nameFilter;
 155 }
 156
 157 KUrl DolphinColumnView::rootUrl() const
 158 {
 159     return m_columns[0]->url();
 160 }
 161
 162 void DolphinColumnView::showColumn(const KUrl& url)
 163 {
 164     if (!rootUrl().isParentOf(url)) {
 165         setRootUrl(url);
 166         return;
 167     }
 168
 169     int columnIndex = 0;
 170     foreach (DolphinColumnWidget* column, m_columns) {
 171         if (column->url() == url) {
 172             // the column represents already the requested URL, hence activate it
 173             requestActivation(column);
 174             layoutColumns();
 175             return;
 176         } else if (!column->url().isParentOf(url)) {
 177             // the column is no parent of the requested URL, hence
 178             // just delete all remaining columns
 179             if (columnIndex > 0) {
 180                 QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 181                 QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 182                 for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 183                     (*it)->deleteLater();
 184                 }
 185                 m_columns.erase(start, end);
 186
 187                 const int maxIndex = m_columns.count() - 1;
 188                 Q_ASSERT(maxIndex >= 0);
 189                 if (m_index > maxIndex) {
 190                     m_index = maxIndex;
 191                 }
 192                 break;
 193             }
 194         }
 195         ++columnIndex;
 196     }
 197
 198     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 199     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 200     // "c" will be created.
 201     const int lastIndex = m_columns.count() - 1;
 202     Q_ASSERT(lastIndex >= 0);
 203
 204     const KUrl& activeUrl = m_columns[lastIndex]->url();
 205     Q_ASSERT(activeUrl.isParentOf(url));
 206     Q_ASSERT(activeUrl != url);
 207
 208     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 209     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 210
 211     columnIndex = lastIndex;
 212     int slashIndex = path.count('/');
 213     bool hasSubPath = (slashIndex >= 0);
 214     while (hasSubPath) {
 215         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 216         if (subPath.isEmpty()) {
 217             hasSubPath = false;
 218         } else {
 219             path += subPath + '/';
 220             ++slashIndex;
 221
 222             const KUrl childUrl = KUrl(path);
 223             m_columns[columnIndex]->setChildUrl(childUrl);
 224             columnIndex++;
 225
 226             DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
 227             const QString filter = nameFilter();
 228             if (!filter.isEmpty()) {
 229                 column->setNameFilter(filter);
 230             }
 231             column->setActive(false);
 232
 233             m_columns.append(column);
 234
 235             // Before invoking layoutColumns() the column must be set visible temporary.
 236             // To prevent a flickering the initial geometry is set to a hidden position.
 237             column->setGeometry(QRect(-1, -1, 1, 1));
 238             column->show();
 239             layoutColumns();
 240             updateScrollBar();
 241         }
 242     }
 243
 244     // set the last column as active column without modifying the controller
 245     // and hence the history
 246     activeColumn()->setActive(false);
 247     m_index = columnIndex;
 248     activeColumn()->setActive(true);
 249     assureVisibleActiveColumn();
 250 }
 251
 252 void DolphinColumnView::selectAll()
 253 {
 254     activeColumn()->selectAll();
 255 }
 256
 257 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 258 {
 259     Q_UNUSED(index);
 260     return false;//activeColumn()->isIndexHidden(index);
 261 }
 262
 263 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 264 {
 265     // Parts of this code have been taken from QColumnView::moveCursor().
 266     // Copyright (C) 1992-2007 Trolltech ASA.
 267
 268     Q_UNUSED(modifiers);
 269     if (model() == 0) {
 270         return QModelIndex();
 271     }
 272
 273     const QModelIndex current = currentIndex();
 274     if (isRightToLeft()) {
 275         if (cursorAction == MoveLeft) {
 276             cursorAction = MoveRight;
 277         } else if (cursorAction == MoveRight) {
 278             cursorAction = MoveLeft;
 279         }
 280     }
 281
 282     switch (cursorAction) {
 283     case MoveLeft:
 284         if (m_index > 0) {
 285             setActiveColumnIndex(m_index - 1);
 286             m_controller->triggerUrlChangeRequest(activeColumn()->url());
 287         }
 288         break;
 289
 290     case MoveRight:
 291         if (m_index < m_columns.count() - 1) {
 292             setActiveColumnIndex(m_index + 1);
 293             m_controller->triggerUrlChangeRequest(m_columns[m_index]->url());
 294         }
 295         break;
 296
 297     default:
 298         break;
 299     }
 300
 301     return QModelIndex();
 302 }
 303
 304 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 305 {
 306     Q_UNUSED(rect);
 307     Q_UNUSED(flags);
 308     //activeColumn()->setSelection(rect, flags);
 309 }
 310
 311 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 312 {
 313     Q_UNUSED(selection);
 314     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 315 }
 316
 317 int DolphinColumnView::horizontalOffset() const
 318 {
 319     return -m_contentX;
 320 }
 321
 322 int DolphinColumnView::verticalOffset() const
 323 {
 324     return 0;
 325 }
 326
 327 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 328 {
 329     m_controller->requestActivation();
 330     QAbstractItemView::mousePressEvent(event);
 331 }
 332
 333 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 334 {
 335     QAbstractItemView::resizeEvent(event);
 336     layoutColumns();
 337     updateScrollBar();
 338     assureVisibleActiveColumn();
 339 }
 340
 341 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 342 {
 343     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 344     if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
 345         event->ignore();
 346         return;
 347     }
 348     QAbstractItemView::wheelEvent(event);
 349 }
 350
 351 void DolphinColumnView::zoomIn()
 352 {
 353     if (isZoomInPossible()) {
 354         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 355         switch (settings->iconSize()) {
 356         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 357         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 358         default: Q_ASSERT(false); break;
 359         }
 360         updateDecorationSize();
 361     }
 362 }
 363
 364 void DolphinColumnView::zoomOut()
 365 {
 366     if (isZoomOutPossible()) {
 367         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 368         switch (settings->iconSize()) {
 369         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 370         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 371         default: Q_ASSERT(false); break;
 372         }
 373         updateDecorationSize();
 374     }
 375 }
 376
 377 void DolphinColumnView::moveContentHorizontally(int x)
 378 {
 379     m_contentX = isRightToLeft() ? +x : -x;
 380     layoutColumns();
 381 }
 382
 383 void DolphinColumnView::updateDecorationSize()
 384 {
 385     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 386     const int iconSize = settings->iconSize();
 387     const QSize size(iconSize, iconSize);
 388     setIconSize(size);
 389
 390     foreach (QObject* object, viewport()->children()) {
 391         if (object->inherits("QListView")) {
 392             DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
 393             widget->setDecorationSize(size);
 394         }
 395     }
 396
 397     m_controller->setZoomInPossible(isZoomInPossible());
 398     m_controller->setZoomOutPossible(isZoomOutPossible());
 399
 400     doItemsLayout();
 401 }
 402
 403 void DolphinColumnView::updateColumnsBackground(bool active)
 404 {
 405     if (active == m_active) {
 406         return;
 407     }
 408
 409     m_active = active;
 410
 411     // dim the background of the viewport
 412     const QPalette::ColorRole role = viewport()->backgroundRole();
 413     QColor background = viewport()->palette().color(role);
 414     background.setAlpha(0);  // make background transparent
 415
 416     QPalette palette = viewport()->palette();
 417     palette.setColor(role, background);
 418     viewport()->setPalette(palette);
 419
 420     foreach (DolphinColumnWidget* column, m_columns) {
 421         column->updateBackground();
 422     }
 423 }
 424
 425 void DolphinColumnView::slotSortingChanged(DolphinView::Sorting sorting)
 426 {
 427     foreach (DolphinColumnWidget* column, m_columns) {
 428         column->setSorting(sorting);
 429     }
 430 }
 431
 432 void DolphinColumnView::slotSortOrderChanged(Qt::SortOrder order)
 433 {
 434     foreach (DolphinColumnWidget* column, m_columns) {
 435         column->setSortOrder(order);
 436     }
 437 }
 438
 439 void DolphinColumnView::slotShowHiddenFilesChanged()
 440 {
 441     const bool show = m_controller->dolphinView()->showHiddenFiles();
 442     foreach (DolphinColumnWidget* column, m_columns) {
 443         column->setShowHiddenFiles(show);
 444     }
 445 }
 446
 447 void DolphinColumnView::slotShowPreviewChanged()
 448 {
 449     const bool show = m_controller->dolphinView()->showPreview();
 450     foreach (DolphinColumnWidget* column, m_columns) {
 451         column->setShowPreview(show);
 452     }
 453 }
 454
 455 bool DolphinColumnView::isZoomInPossible() const
 456 {
 457     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 458     return settings->iconSize() < KIconLoader::SizeLarge;
 459 }
 460
 461 bool DolphinColumnView::isZoomOutPossible() const
 462 {
 463     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 464     return settings->iconSize() > KIconLoader::SizeSmall;
 465 }
 466
 467 void DolphinColumnView::setActiveColumnIndex(int index)
 468 {
 469     if (m_index == index) {
 470         return;
 471     }
 472
 473     const bool hasActiveColumn = (m_index >= 0);
 474     if (hasActiveColumn) {
 475         m_columns[m_index]->setActive(false);
 476     }
 477
 478     m_index = index;
 479     m_columns[m_index]->setActive(true);
 480
 481     assureVisibleActiveColumn();
 482 }
 483
 484 void DolphinColumnView::layoutColumns()
 485 {
 486     const int gap = 4;
 487
 488     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 489     const int columnWidth = settings->columnWidth();
 490
 491     QRect emptyViewportRect;
 492     if (isRightToLeft()) {
 493         int x = viewport()->width() - columnWidth + m_contentX;
 494         foreach (DolphinColumnWidget* column, m_columns) {
 495             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 496             x -= columnWidth;
 497         }
 498         emptyViewportRect = QRect(0, 0, x + columnWidth - gap, viewport()->height());
 499     } else {
 500         int x = m_contentX;
 501         foreach (DolphinColumnWidget* column, m_columns) {
 502             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 503             x += columnWidth;
 504         }
 505         emptyViewportRect = QRect(x, 0, viewport()->width() - x - gap, viewport()->height());
 506     }
 507
 508     if (emptyViewportRect.isValid()) {
 509         m_emptyViewport->show();
 510         m_emptyViewport->setGeometry(emptyViewportRect);
 511     } else {
 512         m_emptyViewport->hide();
 513     }
 514 }
 515
 516 void DolphinColumnView::updateScrollBar()
 517 {
 518     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 519     const int contentWidth = m_columns.count() * settings->columnWidth();
 520
 521     horizontalScrollBar()->setPageStep(contentWidth);
 522     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 523 }
 524
 525 void DolphinColumnView::assureVisibleActiveColumn()
 526 {
 527     const int viewportWidth = viewport()->width();
 528     const int x = activeColumn()->x();
 529
 530     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 531     const int width = settings->columnWidth();
 532
 533     if (x + width > viewportWidth) {
 534         const int newContentX = m_contentX - x - width + viewportWidth;
 535         if (isRightToLeft()) {
 536             m_animation->setFrameRange(m_contentX, newContentX);
 537         } else {
 538             m_animation->setFrameRange(-m_contentX, -newContentX);
 539         }
 540         if (m_animation->state() != QTimeLine::Running) {
 541            m_animation->start();
 542         }
 543     } else if (x < 0) {
 544         const int newContentX = m_contentX - x;
 545         if (isRightToLeft()) {
 546             m_animation->setFrameRange(m_contentX, newContentX);
 547         } else {
 548             m_animation->setFrameRange(-m_contentX, -newContentX);
 549         }
 550         if (m_animation->state() != QTimeLine::Running) {
 551            m_animation->start();
 552         }
 553     }
 554 }
 555
 556 void DolphinColumnView::requestActivation(DolphinColumnWidget* column)
 557 {
 558     m_controller->setItemView(column);
 559     if (column->isActive()) {
 560         assureVisibleActiveColumn();
 561     } else {
 562         int index = 0;
 563         foreach (DolphinColumnWidget* currColumn, m_columns) {
 564             if (currColumn == column) {
 565                 setActiveColumnIndex(index);
 566                 return;
 567             }
 568             ++index;
 569         }
 570     }
 571 }
 572
 573 void DolphinColumnView::removeAllColumns()
 574 {
 575     QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
 576     QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 577     for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 578         (*it)->deleteLater();
 579     }
 580     m_columns.erase(start, end);
 581     m_index = 0;
 582     m_columns[0]->setActive(true);
 583     assureVisibleActiveColumn();
 584 }
 585
 586 #include "dolphincolumnview.moc"