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             return;
 182         } else if (!column->url().isParentOf(url)) {
 183             // the column is no parent of the requested URL, hence
 184             // just delete all remaining columns
 185             if (columnIndex > 0) {
 186                 QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + columnIndex;
 187                 QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 188                 for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 189                     (*it)->deleteLater();
 190                 }
 191                 m_columns.erase(start, end);
 192
 193                 const int maxIndex = m_columns.count() - 1;
 194                 Q_ASSERT(maxIndex >= 0);
 195                 if (m_index > maxIndex) {
 196                     m_index = maxIndex;
 197                 }
 198                 break;
 199             }
 200         }
 201         ++columnIndex;
 202     }
 203
 204     // Create missing columns. Assuming that the path is "/home/peter/Temp/" and
 205     // the target path is "/home/peter/Temp/a/b/c/", then the columns "a", "b" and
 206     // "c" will be created.
 207     const int lastIndex = m_columns.count() - 1;
 208     Q_ASSERT(lastIndex >= 0);
 209
 210     const KUrl& activeUrl = m_columns[lastIndex]->url();
 211     Q_ASSERT(activeUrl.isParentOf(url));
 212     Q_ASSERT(activeUrl != url);
 213
 214     QString path = activeUrl.url(KUrl::AddTrailingSlash);
 215     const QString targetPath = url.url(KUrl::AddTrailingSlash);
 216
 217     columnIndex = lastIndex;
 218     int slashIndex = path.count('/');
 219     bool hasSubPath = (slashIndex >= 0);
 220     while (hasSubPath) {
 221         const QString subPath = targetPath.section('/', slashIndex, slashIndex);
 222         if (subPath.isEmpty()) {
 223             hasSubPath = false;
 224         } else {
 225             path += subPath + '/';
 226             ++slashIndex;
 227
 228             const KUrl childUrl = KUrl(path);
 229             m_columns[columnIndex]->setChildUrl(childUrl);
 230             columnIndex++;
 231
 232             DolphinColumnWidget* column = new DolphinColumnWidget(viewport(), this, childUrl);
 233             const QString filter = nameFilter();
 234             if (!filter.isEmpty()) {
 235                 column->setNameFilter(filter);
 236             }
 237             column->setActive(false);
 238
 239             m_columns.append(column);
 240
 241             // Before invoking layoutColumns() the column must be set visible temporary.
 242             // To prevent a flickering the initial geometry is set to a hidden position.
 243             column->setGeometry(QRect(-1, -1, 1, 1));
 244             column->show();
 245             layoutColumns();
 246             updateScrollBar();
 247         }
 248     }
 249
 250     // set the last column as active column without modifying the controller
 251     // and hence the history
 252     activeColumn()->setActive(false);
 253     m_index = columnIndex;
 254     activeColumn()->setActive(true);
 255     assureVisibleActiveColumn();
 256 }
 257
 258 void DolphinColumnView::selectAll()
 259 {
 260     activeColumn()->selectAll();
 261 }
 262
 263 bool DolphinColumnView::isIndexHidden(const QModelIndex& index) const
 264 {
 265     Q_UNUSED(index);
 266     return false;//activeColumn()->isIndexHidden(index);
 267 }
 268
 269 QModelIndex DolphinColumnView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 270 {
 271     // Parts of this code have been taken from QColumnView::moveCursor().
 272     // Copyright (C) 1992-2007 Trolltech ASA.
 273
 274     Q_UNUSED(modifiers);
 275     if (model() == 0) {
 276         return QModelIndex();
 277     }
 278
 279     const QModelIndex current = currentIndex();
 280     if (isRightToLeft()) {
 281         if (cursorAction == MoveLeft) {
 282             cursorAction = MoveRight;
 283         } else if (cursorAction == MoveRight) {
 284             cursorAction = MoveLeft;
 285         }
 286     }
 287
 288     switch (cursorAction) {
 289     case MoveLeft:
 290         if (m_index > 0) {
 291             setActiveColumnIndex(m_index - 1);
 292             m_controller->triggerUrlChangeRequest(activeColumn()->url());
 293         }
 294         break;
 295
 296     case MoveRight:
 297         if (m_index < m_columns.count() - 1) {
 298             setActiveColumnIndex(m_index + 1);
 299             m_controller->triggerUrlChangeRequest(m_columns[m_index]->url());
 300         }
 301         break;
 302
 303     default:
 304         break;
 305     }
 306
 307     return QModelIndex();
 308 }
 309
 310 void DolphinColumnView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags flags)
 311 {
 312     Q_UNUSED(rect);
 313     Q_UNUSED(flags);
 314     //activeColumn()->setSelection(rect, flags);
 315 }
 316
 317 QRegion DolphinColumnView::visualRegionForSelection(const QItemSelection& selection) const
 318 {
 319     Q_UNUSED(selection);
 320     return QRegion(); //activeColumn()->visualRegionForSelection(selection);
 321 }
 322
 323 int DolphinColumnView::horizontalOffset() const
 324 {
 325     return -m_contentX;
 326 }
 327
 328 int DolphinColumnView::verticalOffset() const
 329 {
 330     return 0;
 331 }
 332
 333 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 334 {
 335     m_controller->requestActivation();
 336     QAbstractItemView::mousePressEvent(event);
 337 }
 338
 339 void DolphinColumnView::resizeEvent(QResizeEvent* event)
 340 {
 341     QAbstractItemView::resizeEvent(event);
 342     layoutColumns();
 343     updateScrollBar();
 344 }
 345
 346 void DolphinColumnView::zoomIn()
 347 {
 348     if (isZoomInPossible()) {
 349         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 350         switch (settings->iconSize()) {
 351         case KIconLoader::SizeSmall:  settings->setIconSize(KIconLoader::SizeMedium); break;
 352         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeLarge); break;
 353         default: Q_ASSERT(false); break;
 354         }
 355         updateDecorationSize();
 356     }
 357 }
 358
 359 void DolphinColumnView::zoomOut()
 360 {
 361     if (isZoomOutPossible()) {
 362         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 363         switch (settings->iconSize()) {
 364         case KIconLoader::SizeLarge:  settings->setIconSize(KIconLoader::SizeMedium); break;
 365         case KIconLoader::SizeMedium: settings->setIconSize(KIconLoader::SizeSmall); break;
 366         default: Q_ASSERT(false); break;
 367         }
 368         updateDecorationSize();
 369     }
 370 }
 371
 372 void DolphinColumnView::moveContentHorizontally(int x)
 373 {
 374     m_contentX = isRightToLeft() ? +x : -x;
 375     layoutColumns();
 376 }
 377
 378 void DolphinColumnView::updateDecorationSize()
 379 {
 380     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 381     const int iconSize = settings->iconSize();
 382
 383     foreach (QObject* object, viewport()->children()) {
 384         if (object->inherits("QListView")) {
 385             DolphinColumnWidget* widget = static_cast<DolphinColumnWidget*>(object);
 386             widget->setDecorationSize(QSize(iconSize, iconSize));
 387         }
 388     }
 389
 390     m_controller->setZoomInPossible(isZoomInPossible());
 391     m_controller->setZoomOutPossible(isZoomOutPossible());
 392
 393     doItemsLayout();
 394 }
 395
 396 void DolphinColumnView::updateColumnsBackground(bool active)
 397 {
 398     if (active == m_active) {
 399         return;
 400     }
 401
 402     m_active = active;
 403
 404     // dim the background of the viewport
 405     QPalette palette;
 406     palette.setColor(viewport()->backgroundRole(), QColor(0, 0, 0, 0));
 407     viewport()->setPalette(palette);
 408
 409     foreach (DolphinColumnWidget* column, m_columns) {
 410         column->updateBackground();
 411     }
 412 }
 413
 414 void DolphinColumnView::slotShowHiddenFilesChanged()
 415 {
 416     const bool show = m_controller->dolphinView()->showHiddenFiles();
 417     foreach (DolphinColumnWidget* column, m_columns) {
 418         column->setShowHiddenFiles(show);
 419     }
 420 }
 421
 422 void DolphinColumnView::slotShowPreviewChanged()
 423 {
 424     const bool show = m_controller->dolphinView()->showPreview();
 425     foreach (DolphinColumnWidget* column, m_columns) {
 426         column->setShowPreview(show);
 427     }
 428 }
 429
 430 bool DolphinColumnView::isZoomInPossible() const
 431 {
 432     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 433     return settings->iconSize() < KIconLoader::SizeLarge;
 434 }
 435
 436 bool DolphinColumnView::isZoomOutPossible() const
 437 {
 438     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 439     return settings->iconSize() > KIconLoader::SizeSmall;
 440 }
 441
 442 void DolphinColumnView::setActiveColumnIndex(int index)
 443 {
 444     if (m_index == index) {
 445         return;
 446     }
 447
 448     const bool hasActiveColumn = (m_index >= 0);
 449     if (hasActiveColumn) {
 450         m_columns[m_index]->setActive(false);
 451     }
 452
 453     m_index = index;
 454     m_columns[m_index]->setActive(true);
 455
 456     assureVisibleActiveColumn();
 457 }
 458
 459 void DolphinColumnView::layoutColumns()
 460 {
 461     const int gap = 4;
 462
 463     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 464     const int columnWidth = settings->columnWidth();
 465
 466     QRect emptyViewportRect;
 467     if (isRightToLeft()) {
 468         int x = viewport()->width() - columnWidth + m_contentX;
 469         foreach (DolphinColumnWidget* column, m_columns) {
 470             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 471             x -= columnWidth;
 472         }
 473         emptyViewportRect = QRect(0, 0, x + columnWidth - gap, viewport()->height());
 474     } else {
 475         int x = m_contentX;
 476         foreach (DolphinColumnWidget* column, m_columns) {
 477             column->setGeometry(QRect(x, 0, columnWidth - gap, viewport()->height()));
 478             x += columnWidth;
 479         }
 480         emptyViewportRect = QRect(x, 0, viewport()->width() - x - gap, viewport()->height());
 481     }
 482
 483     if (emptyViewportRect.isValid()) {
 484         m_emptyViewport->show();
 485         m_emptyViewport->setGeometry(emptyViewportRect);
 486     } else {
 487         m_emptyViewport->hide();
 488     }
 489 }
 490
 491 void DolphinColumnView::updateScrollBar()
 492 {
 493     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 494     const int contentWidth = m_columns.count() * settings->columnWidth();
 495
 496     horizontalScrollBar()->setPageStep(contentWidth);
 497     horizontalScrollBar()->setRange(0, contentWidth - viewport()->width());
 498 }
 499
 500 void DolphinColumnView::assureVisibleActiveColumn()
 501 {
 502     const int viewportWidth = viewport()->width();
 503     const int x = activeColumn()->x();
 504
 505     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 506     const int width = settings->columnWidth();
 507
 508     if (x + width > viewportWidth) {
 509         const int newContentX = m_contentX - x - width + viewportWidth;
 510         if (isRightToLeft()) {
 511             m_animation->setFrameRange(m_contentX, newContentX);
 512         } else {
 513             m_animation->setFrameRange(-m_contentX, -newContentX);
 514         }
 515         m_animation->start();
 516     } else if (x < 0) {
 517         const int newContentX = m_contentX - x;
 518         if (isRightToLeft()) {
 519             m_animation->setFrameRange(m_contentX, newContentX);
 520         } else {
 521             m_animation->setFrameRange(-m_contentX, -newContentX);
 522         }
 523         m_animation->start();
 524     }
 525 }
 526
 527 void DolphinColumnView::requestActivation(DolphinColumnWidget* column)
 528 {
 529     if (column->isActive()) {
 530         assureVisibleActiveColumn();
 531     } else {
 532         int index = 0;
 533         foreach (DolphinColumnWidget* currColumn, m_columns) {
 534             if (currColumn == column) {
 535                 setActiveColumnIndex(index);
 536                 return;
 537             }
 538             ++index;
 539         }
 540     }
 541 }
 542
 543 void DolphinColumnView::removeAllColumns()
 544 {
 545     QList<DolphinColumnWidget*>::iterator start = m_columns.begin() + 1;
 546     QList<DolphinColumnWidget*>::iterator end = m_columns.end();
 547     for (QList<DolphinColumnWidget*>::iterator it = start; it != end; ++it) {
 548         (*it)->deleteLater();
 549     }
 550     m_columns.erase(start, end);
 551     m_index = 0;
 552     m_columns[0]->setActive(true);
 553     assureVisibleActiveColumn();
 554 }
 555
 556 #include "dolphincolumnview.moc"