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