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 KUrl DolphinColumnView::rootUrl() const
 143 {
 144     return m_columns[0]->url();
 145 }
 146
 147 void DolphinColumnView::showColumn(const KUrl& url)
 148 {
 149     if (!rootUrl().isParentOf(url)) {
 150         setRootUrl(url);
 151         return;
 152     }
 153
 154     int columnIndex = 0;
 155     foreach (DolphinColumnWidget* column, m_columns) {
 156         if (column->url() == url) {
 157             // the column represents already the requested URL, hence activate it
 158             requestActivation(column);
 159             return;
 160         } else if (!column->url().isParentOf(url)) {
 161             // the column is no parent of the requested URL, hence
 162             // just delete all remaining columns
 163             if (columnIndex > 0) {
 164                 QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 165                 QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 166                 for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 167                     (*it)->deleteLater();
 168                 }
 169                 m_columns.erase(start, end);
 170
 171                 const int maxIndex = m_columns.count() - 1;
 172                 Q_ASSERT(maxIndex >= 0);
 173                 if (m_index > maxIndex) {
 174                     m_index = maxIndex;
 175                 }
 176                 break;
 177             }
 178         }
 179         ++columnIndex;
 180     }
 181
 182     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 183     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 184     // "c" will be created.
 185     const int lastIndex = m_columns.count() - 1;
 186     Q_ASSERT(lastIndex >= 0);
 187
 188     const KUrl& activeUrl = m_columns[lastIndex]->url();
 189     Q_ASSERT(activeUrl.isParentOf(url));
 190     Q_ASSERT(activeUrl != url);
 191
 192     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 193     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 194
 195     columnIndex = lastIndex;
 196     int slashIndex = path.count('/');
 197     bool hasSubPath = (slashIndex >= 0);
 198     while (hasSubPath) {
 199         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 200         if (subPath.isEmpty()) {
 201             hasSubPath = false;
 202         } else {
 203             path += subPath + '/';
 204             ++slashIndex;
 205
 206             const KUrl childUrl = KUrl(path);
 207             m_columns[columnIndex]->setChildUrl(childUrl);
 208             columnIndex++;
 209
 210             DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
 211             column->setActive(false);
 212
 213             m_columns.append(column);
 214
 215             // Before invoking layoutColumns() the column must be set visible temporary.
 216             // To prevent a flickering the initial geometry is set to a hidden position.
 217             column->setGeometry(QRect(-1, -1, 1, 1));
 218             column->show();
 219             layoutColumns();
 220             updateScrollBar();
 221         }
 222     }
 223
 224     // set the last column as active column without modifying the controller
 225     // and hence the history
 226     activeColumn()->setActive(false);
 227     m_index = columnIndex;
 228     activeColumn()->setActive(true);
 229     assureVisibleActiveColumn();
 230 }
 231
 232 void DolphinColumnView::selectAll()
 233 {
 234     activeColumn()->selectAll();
 235 }
 236
 237 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 238 {
 239     Q_UNUSED(index);
 240     return false;//activeColumn()->isIndexHidden(index);
 241 }
 242
 243 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 244 {
 245     // Parts of this code have been taken from QColumnView::moveCursor().
 246     // Copyright (C) 1992-2007 Trolltech ASA.
 247
 248     Q_UNUSED(modifiers);
 249     if (model() == 0) {
 250         return QModelIndex();
 251     }
 252
 253     const QModelIndex current = currentIndex();
 254     if (isRightToLeft()) {
 255         if (cursorAction == MoveLeft) {
 256             cursorAction = MoveRight;
 257         } else if (cursorAction == MoveRight) {
 258             cursorAction = MoveLeft;
 259         }
 260     }
 261
 262     switch (cursorAction) {
 263     case MoveLeft:
 264         if (m_index > 0) {
 265             setActiveColumnIndex(m_index - 1);
 266         }
 267         break;
 268
 269     case MoveRight:
 270         if (m_index < m_columns.count() - 1) {
 271             setActiveColumnIndex(m_index + 1);
 272         }
 273         break;
 274
 275     default:
 276         break;
 277     }
 278
 279     return QModelIndex();
 280 }
 281
 282 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 283 {
 284     Q_UNUSED(rect);
 285     Q_UNUSED(flags);
 286     //activeColumn()->setSelection(rect, flags);
 287 }
 288
 289 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 290 {
 291     Q_UNUSED(selection);
 292     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 293 }
 294
 295 int DolphinColumnView::horizontalOffset() const
 296 {
 297     return -m_contentX;
 298 }
 299
 300 int DolphinColumnView::verticalOffset() const
 301 {
 302     return 0;
 303 }
 304
 305 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 306 {
 307     m_controller->requestActivation();
 308     QAbstractItemView::mousePressEvent(event);
 309 }
 310
 311 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 312 {
 313     QAbstractItemView::resizeEvent(event);
 314     layoutColumns();
 315     updateScrollBar();
 316 }
 317
 318 void DolphinColumnView::zoomIn()
 319 {
 320     if (isZoomInPossible()) {
 321         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 322         switch (settings->iconSize()) {
 323         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 324         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 325         default: Q_ASSERT(false); break;
 326         }
 327         updateDecorationSize();
 328     }
 329 }
 330
 331 void DolphinColumnView::zoomOut()
 332 {
 333     if (isZoomOutPossible()) {
 334         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 335         switch (settings->iconSize()) {
 336         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 337         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 338         default: Q_ASSERT(false); break;
 339         }
 340         updateDecorationSize();
 341     }
 342 }
 343
 344 void DolphinColumnView::moveContentHorizontally(int x)
 345 {
 346     m_contentX = isRightToLeft() ? +x : -x;
 347     layoutColumns();
 348 }
 349
 350 void DolphinColumnView::updateDecorationSize()
 351 {
 352     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 353     const int iconSize = settings->iconSize();
 354
 355     foreach (QObject* object, viewport()->children()) {
 356         if (object->inherits("QListView")) {
 357             DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
 358             widget->setDecorationSize(QSize(iconSize, iconSize));
 359         }
 360     }
 361
 362     m_controller->setZoomInPossible(isZoomInPossible());
 363     m_controller->setZoomOutPossible(isZoomOutPossible());
 364
 365     doItemsLayout();
 366 }
 367
 368 void DolphinColumnView::updateColumnsBackground(bool active)
 369 {
 370     if (active == m_active) {
 371         return;
 372     }
 373
 374     m_active = active;
 375
 376     // dim the background of the viewport
 377     QColor color = KColorScheme(QPalette::Active, KColorScheme::View).background().color();
 378     color.setAlpha(150);
 379
 380     QPalette palette;
 381     palette.setColor(viewport()->backgroundRole(), color);
 382     viewport()->setPalette(palette);
 383
 384     foreach (DolphinColumnWidget* column, m_columns) {
 385         column->updateBackground();
 386     }
 387 }
 388
 389 void DolphinColumnView::slotShowHiddenFilesChanged(bool show)
 390 {
 391     foreach (DolphinColumnWidget* column, m_columns) {
 392         column->setShowHiddenFiles(show);
 393     }
 394 }
 395
 396 void DolphinColumnView::slotShowPreviewChanged(bool show)
 397 {
 398     foreach (DolphinColumnWidget* column, m_columns) {
 399         column->setShowPreview(show);
 400     }
 401 }
 402
 403 bool DolphinColumnView::isZoomInPossible() const
 404 {
 405     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 406     return settings->iconSize() < KIconLoader::SizeLarge;
 407 }
 408
 409 bool DolphinColumnView::isZoomOutPossible() const
 410 {
 411     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 412     return settings->iconSize() > KIconLoader::SizeSmall;
 413 }
 414
 415 void DolphinColumnView::setActiveColumnIndex(int index)
 416 {
 417     if (m_index == index) {
 418         return;
 419     }
 420
 421     const bool hasActiveColumn = (m_index >= 0);
 422     if (hasActiveColumn) {
 423         m_columns[m_index]->setActive(false);
 424     }
 425
 426     m_index = index;
 427     m_columns[m_index]->setActive(true);
 428
 429     m_controller->setUrl(m_columns[m_index]->url());
 430
 431     assureVisibleActiveColumn();
 432 }
 433
 434 void DolphinColumnView::layoutColumns()
 435 {
 436     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 437     const int columnWidth = settings->columnWidth();
 438     if (isRightToLeft()) {
 439         int x = viewport()->width() - columnWidth + m_contentX;
 440         foreach (DolphinColumnWidget* column, m_columns) {
 441             column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 442             x -= columnWidth;
 443         }
 444     } else {
 445         int x = m_contentX;
 446         foreach (DolphinColumnWidget* column, m_columns) {
 447             column->setGeometry(QRect(x, 0, columnWidth, viewport()->height()));
 448             x += columnWidth;
 449         }
 450     }
 451 }
 452
 453 void DolphinColumnView::updateScrollBar()
 454 {
 455     int contentWidth = 0;
 456     foreach (DolphinColumnWidget* column, m_columns) {
 457         contentWidth += column->width();
 458     }
 459
 460     horizontalScrollBar()->setPageStep(contentWidth);
 461     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 462 }
 463
 464 void DolphinColumnView::assureVisibleActiveColumn()
 465 {
 466     const int viewportWidth = viewport()->width();
 467     const int x = activeColumn()->x();
 468     const int width = activeColumn()->width();
 469     if (x + width > viewportWidth) {
 470         const int newContentX = m_contentX - x - width + viewportWidth;
 471         if (isRightToLeft()) {
 472             m_animation->setFrameRange(m_contentX, newContentX);
 473         } else {
 474             m_animation->setFrameRange(-m_contentX, -newContentX);
 475         }
 476         m_animation->start();
 477     } else if (x < 0) {
 478         const int newContentX = m_contentX - x;
 479         if (isRightToLeft()) {
 480             m_animation->setFrameRange(m_contentX, newContentX);
 481         } else {
 482             m_animation->setFrameRange(-m_contentX, -newContentX);
 483         }
 484         m_animation->start();
 485     }
 486 }
 487
 488 void DolphinColumnView::requestActivation(DolphinColumnWidget* column)
 489 {
 490     if (column->isActive()) {
 491         assureVisibleActiveColumn();
 492     } else {
 493         int index = 0;
 494         foreach (DolphinColumnWidget* currColumn, m_columns) {
 495             if (currColumn == column) {
 496                 setActiveColumnIndex(index);
 497                 return;
 498             }
 499             ++index;
 500         }
 501     }
 502 }
 503
 504 void DolphinColumnView::removeAllColumns()
 505 {
 506     QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
 507     QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 508     for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 509         (*it)->deleteLater();
 510     }
 511     m_columns.erase(start, end);
 512     m_index = 0;
 513     m_columns[0]->setActive(true);
 514     assureVisibleActiveColumn();
 515 }
 516
 517 #include "dolphincolumnview.moc"