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 "dolphincolumnwidget.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphindirlister.h"
  26 #include "dolphinmodel.h"
  27 #include "dolphinsortfilterproxymodel.h"
  28 #include "dolphinsettings.h"
  29
  30 #include "dolphin_columnmodesettings.h"
  31
  32 #include <kcolorutils.h>
  33 #include <kcolorscheme.h>
  34 #include <kdirlister.h>
  35
  36 #include <QAbstractProxyModel>
  37 #include <QApplication>
  38 #include <QPoint>
  39 #include <QScrollBar>
  40 #include <QTimer>
  41 #include <QTimeLine>
  42
  43 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
  44     QAbstractItemView(parent),
  45     m_controller(controller),
  46     m_active(false),
  47     m_index(-1),
  48     m_contentX(0),
  49     m_columns(),
  50     m_animation(0)
  51 {
  52     Q_ASSERT(controller != 0);
  53
  54     setAcceptDrops(true);
  55     setDragDropMode(QAbstractItemView::DragDrop);
  56     setDropIndicatorShown(false);
  57     setSelectionMode(ExtendedSelection);
  58
  59     connect(this, SIGNAL(entered(const QModelIndex&)),
  60             controller, SLOT(emitItemEntered(const QModelIndex&)));
  61     connect(this, SIGNAL(viewportEntered()),
  62             controller, SLOT(emitViewportEntered()));
  63     connect(controller, SIGNAL(zoomIn()),
  64             this, SLOT(zoomIn()));
  65     connect(controller, SIGNAL(zoomOut()),
  66             this, SLOT(zoomOut()));
  67     connect(controller, SIGNAL(showHiddenFilesChanged(bool)),
  68             this, SLOT(slotShowHiddenFilesChanged(bool)));
  69     connect(controller, SIGNAL(showPreviewChanged(bool)),
  70             this, SLOT(slotShowPreviewChanged(bool)));
  71     connect(controller, SIGNAL(activationChanged(bool)),
  72             this, SLOT(updateColumnsBackground(bool)));
  73
  74     connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
  75             this, SLOT(moveContentHorizontally(int)));
  76
  77     m_animation = new QTimeLine(500, this);
  78     connect(m_animation, SIGNAL(frameChanged(int)), horizontalScrollBar(), SLOT(setValue(int)));
  79
  80     DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, m_controller->url());
  81     m_columns.append(column);
  82     setActiveColumnIndex(0);
  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     foreach (DolphinColumnWidget* column, m_columns) {
 145         column->setNameFilter(nameFilter);
 146     }
 147 }
 148
 149 QString DolphinColumnView::nameFilter() const
 150 {
 151     return activeColumn()->nameFilter();
 152 }
 153
 154 KUrl DolphinColumnView::rootUrl() const
 155 {
 156     return m_columns[0]->url();
 157 }
 158
 159 void DolphinColumnView::showColumn(const KUrl& url)
 160 {
 161     if (!rootUrl().isParentOf(url)) {
 162         setRootUrl(url);
 163         return;
 164     }
 165
 166     int columnIndex = 0;
 167     foreach (DolphinColumnWidget* column, m_columns) {
 168         if (column->url() == url) {
 169             // the column represents already the requested URL, hence activate it
 170             requestActivation(column);
 171             return;
 172         } else if (!column->url().isParentOf(url)) {
 173             // the column is no parent of the requested URL, hence
 174             // just delete all remaining columns
 175             if (columnIndex > 0) {
 176                 QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 177                 QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 178                 for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 179                     (*it)->deleteLater();
 180                 }
 181                 m_columns.erase(start, end);
 182
 183                 const int maxIndex = m_columns.count() - 1;
 184                 Q_ASSERT(maxIndex >= 0);
 185                 if (m_index > maxIndex) {
 186                     m_index = maxIndex;
 187                 }
 188                 break;
 189             }
 190         }
 191         ++columnIndex;
 192     }
 193
 194     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 195     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 196     // "c" will be created.
 197     const int lastIndex = m_columns.count() - 1;
 198     Q_ASSERT(lastIndex >= 0);
 199
 200     const KUrl& activeUrl = m_columns[lastIndex]->url();
 201     Q_ASSERT(activeUrl.isParentOf(url));
 202     Q_ASSERT(activeUrl != url);
 203
 204     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 205     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 206
 207     columnIndex = lastIndex;
 208     int slashIndex = path.count('/');
 209     bool hasSubPath = (slashIndex >= 0);
 210     while (hasSubPath) {
 211         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 212         if (subPath.isEmpty()) {
 213             hasSubPath = false;
 214         } else {
 215             path += subPath + '/';
 216             ++slashIndex;
 217
 218             const KUrl childUrl = KUrl(path);
 219             m_columns[columnIndex]->setChildUrl(childUrl);
 220             columnIndex++;
 221
 222             DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
 223             const QString filter = nameFilter();
 224             if (!filter.isEmpty()) {
 225                 column->setNameFilter(filter);
 226             }
 227             column->setActive(false);
 228
 229             m_columns.append(column);
 230
 231             // Before invoking layoutColumns() the column must be set visible temporary.
 232             // To prevent a flickering the initial geometry is set to a hidden position.
 233             column->setGeometry(QRect(-1, -1, 1, 1));
 234             column->show();
 235             layoutColumns();
 236             updateScrollBar();
 237         }
 238     }
 239
 240     // set the last column as active column without modifying the controller
 241     // and hence the history
 242     activeColumn()->setActive(false);
 243     m_index = columnIndex;
 244     activeColumn()->setActive(true);
 245     assureVisibleActiveColumn();
 246 }
 247
 248 void DolphinColumnView::selectAll()
 249 {
 250     activeColumn()->selectAll();
 251 }
 252
 253 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 254 {
 255     Q_UNUSED(index);
 256     return false;//activeColumn()->isIndexHidden(index);
 257 }
 258
 259 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 260 {
 261     // Parts of this code have been taken from QColumnView::moveCursor().
 262     // Copyright (C) 1992-2007 Trolltech ASA.
 263
 264     Q_UNUSED(modifiers);
 265     if (model() == 0) {
 266         return QModelIndex();
 267     }
 268
 269     const QModelIndex current = currentIndex();
 270     if (isRightToLeft()) {
 271         if (cursorAction == MoveLeft) {
 272             cursorAction = MoveRight;
 273         } else if (cursorAction == MoveRight) {
 274             cursorAction = MoveLeft;
 275         }
 276     }
 277
 278     switch (cursorAction) {
 279     case MoveLeft:
 280         if (m_index > 0) {
 281             setActiveColumnIndex(m_index - 1);
 282             m_controller->triggerUrlChangeRequest(activeColumn()->url());
 283         }
 284         break;
 285
 286     case MoveRight:
 287         if (m_index < m_columns.count() - 1) {
 288             setActiveColumnIndex(m_index + 1);
 289             m_controller->triggerUrlChangeRequest(m_columns[m_index]->url());
 290         }
 291         break;
 292
 293     default:
 294         break;
 295     }
 296
 297     return QModelIndex();
 298 }
 299
 300 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 301 {
 302     Q_UNUSED(rect);
 303     Q_UNUSED(flags);
 304     //activeColumn()->setSelection(rect, flags);
 305 }
 306
 307 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 308 {
 309     Q_UNUSED(selection);
 310     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 311 }
 312
 313 int DolphinColumnView::horizontalOffset() const
 314 {
 315     return -m_contentX;
 316 }
 317
 318 int DolphinColumnView::verticalOffset() const
 319 {
 320     return 0;
 321 }
 322
 323 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 324 {
 325     m_controller->requestActivation();
 326     QAbstractItemView::mousePressEvent(event);
 327 }
 328
 329 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 330 {
 331     QAbstractItemView::resizeEvent(event);
 332     layoutColumns();
 333     updateScrollBar();
 334 }
 335
 336 void DolphinColumnView::zoomIn()
 337 {
 338     if (isZoomInPossible()) {
 339         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 340         switch (settings->iconSize()) {
 341         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 342         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 343         default: Q_ASSERT(false); break;
 344         }
 345         updateDecorationSize();
 346     }
 347 }
 348
 349 void DolphinColumnView::zoomOut()
 350 {
 351     if (isZoomOutPossible()) {
 352         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 353         switch (settings->iconSize()) {
 354         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 355         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 356         default: Q_ASSERT(false); break;
 357         }
 358         updateDecorationSize();
 359     }
 360 }
 361
 362 void DolphinColumnView::moveContentHorizontally(int x)
 363 {
 364     m_contentX = isRightToLeft() ? +x : -x;
 365     layoutColumns();
 366 }
 367
 368 void DolphinColumnView::updateDecorationSize()
 369 {
 370     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 371     const int iconSize = settings->iconSize();
 372
 373     foreach (QObject* object, viewport()->children()) {
 374         if (object->inherits("QListView")) {
 375             DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
 376             widget->setDecorationSize(QSize(iconSize, iconSize));
 377         }
 378     }
 379
 380     m_controller->setZoomInPossible(isZoomInPossible());
 381     m_controller->setZoomOutPossible(isZoomOutPossible());
 382
 383     doItemsLayout();
 384 }
 385
 386 void DolphinColumnView::updateColumnsBackground(bool active)
 387 {
 388     if (active == m_active) {
 389         return;
 390     }
 391
 392     m_active = active;
 393
 394     // dim the background of the viewport
 395     QColor color = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 396     color.setAlpha(150);
 397
 398     QPalette palette;
 399     palette.setColor(viewport()->backgroundRole(), color);
 400     viewport()->setPalette(palette);
 401
 402     foreach (DolphinColumnWidget* column, m_columns) {
 403         column->updateBackground();
 404     }
 405 }
 406
 407 void DolphinColumnView::slotShowHiddenFilesChanged(bool show)
 408 {
 409     foreach (DolphinColumnWidget* column, m_columns) {
 410         column->setShowHiddenFiles(show);
 411     }
 412 }
 413
 414 void DolphinColumnView::slotShowPreviewChanged(bool show)
 415 {
 416     foreach (DolphinColumnWidget* column, m_columns) {
 417         column->setShowPreview(show);
 418     }
 419 }
 420
 421 bool DolphinColumnView::isZoomInPossible() const
 422 {
 423     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 424     return settings->iconSize() < KIconLoader::SizeLarge;
 425 }
 426
 427 bool DolphinColumnView::isZoomOutPossible() const
 428 {
 429     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 430     return settings->iconSize() > KIconLoader::SizeSmall;
 431 }
 432
 433 void DolphinColumnView::setActiveColumnIndex(int index)
 434 {
 435     if (m_index == index) {
 436         return;
 437     }
 438
 439     const bool hasActiveColumn = (m_index >= 0);
 440     if (hasActiveColumn) {
 441         m_columns[m_index]->setActive(false);
 442     }
 443
 444     m_index = index;
 445     m_columns[m_index]->setActive(true);
 446
 447     assureVisibleActiveColumn();
 448 }
 449
 450 void DolphinColumnView::layoutColumns()
 451 {
 452     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 453     const int columnWidth = settings->columnWidth();
 454     if (isRightToLeft()) {
 455         int x = viewport()->width() - columnWidth + m_contentX;
 456         foreach (DolphinColumnWidget* column, m_columns) {
 457             column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 458             x -= columnWidth;
 459         }
 460     } else {
 461         int x = m_contentX;
 462         foreach (DolphinColumnWidget* column, m_columns) {
 463             column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 464             x += columnWidth;
 465         }
 466     }
 467 }
 468
 469 void DolphinColumnView::updateScrollBar()
 470 {
 471     int contentWidth = 0;
 472     foreach (DolphinColumnWidget* column, m_columns) {
 473         contentWidth += column->width();
 474     }
 475
 476     horizontalScrollBar()->setPageStep(contentWidth);
 477     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 478 }
 479
 480 void DolphinColumnView::assureVisibleActiveColumn()
 481 {
 482     const int viewportWidth = viewport()->width();
 483     const int x = activeColumn()->x();
 484     const int width = activeColumn()->width();
 485     if (x + width > viewportWidth) {
 486         const int newContentX = m_contentX - x - width + viewportWidth;
 487         if (isRightToLeft()) {
 488             m_animation->setFrameRange(m_contentX, newContentX);
 489         } else {
 490             m_animation->setFrameRange(-m_contentX, -newContentX);
 491         }
 492         m_animation->start();
 493     } else if (x < 0) {
 494         const int newContentX = m_contentX - x;
 495         if (isRightToLeft()) {
 496             m_animation->setFrameRange(m_contentX, newContentX);
 497         } else {
 498             m_animation->setFrameRange(-m_contentX, -newContentX);
 499         }
 500         m_animation->start();
 501     }
 502 }
 503
 504 void DolphinColumnView::requestActivation(DolphinColumnWidget* column)
 505 {
 506     if (column->isActive()) {
 507         assureVisibleActiveColumn();
 508     } else {
 509         int index = 0;
 510         foreach (DolphinColumnWidget* currColumn, m_columns) {
 511             if (currColumn == column) {
 512                 setActiveColumnIndex(index);
 513                 return;
 514             }
 515             ++index;
 516         }
 517     }
 518 }
 519
 520 void DolphinColumnView::removeAllColumns()
 521 {
 522     QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
 523     QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 524     for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 525         (*it)->deleteLater();
 526     }
 527     m_columns.erase(start, end);
 528     m_index = 0;
 529     m_columns[0]->setActive(true);
 530     assureVisibleActiveColumn();
 531 }
 532
 533 #include "dolphincolumnview.moc"