src/dolphiniconsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006-2009 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 "dolphiniconsview.h"
  21
  22 #include "dolphincategorydrawer.h"
  23 #include "dolphincontroller.h"
  24 #include "settings/dolphinsettings.h"
  25 #include "dolphinsortfilterproxymodel.h"
  26 #include "dolphinviewautoscroller.h"
  27 #include "dolphin_iconsmodesettings.h"
  28 #include "dolphin_generalsettings.h"
  29 #include "draganddrophelper.h"
  30 #include "selectionmanager.h"
  31 #include "viewextensionsfactory.h"
  32 #include "zoomlevelinfo.h"
  33
  34 #include <kcategorizedsortfilterproxymodel.h>
  35 #include <kdialog.h>
  36 #include <kdirmodel.h>
  37 #include <kfileitemdelegate.h>
  38
  39 #include <QAbstractProxyModel>
  40 #include <QApplication>
  41 #include <QScrollBar>
  42
  43 DolphinIconsView::DolphinIconsView(QWidget* parent,
  44                                    DolphinController* controller,
  45                                    DolphinSortFilterProxyModel* proxyModel) :
  46     KCategorizedView(parent),
  47     m_controller(controller),
  48     m_selectionManager(0),
  49     m_autoScroller(0),
  50     m_categoryDrawer(0),
  51     m_extensionsFactory(0),
  52     m_font(),
  53     m_decorationSize(),
  54     m_decorationPosition(QStyleOptionViewItem::Top),
  55     m_displayAlignment(Qt::AlignHCenter),
  56     m_itemSize(),
  57     m_dropRect()
  58 {
  59     Q_ASSERT(controller != 0);
  60     setModel(proxyModel);
  61     setLayoutDirection(Qt::LeftToRight);
  62     setViewMode(QListView::IconMode);
  63     setResizeMode(QListView::Adjust);
  64     setMovement(QListView::Static);
  65     setDragEnabled(true);
  66     setEditTriggers(QAbstractItemView::NoEditTriggers);
  67     viewport()->setAcceptDrops(true);
  68
  69     setMouseTracking(true);
  70     m_autoScroller = new DolphinViewAutoScroller(this);
  71
  72     connect(this, SIGNAL(clicked(const QModelIndex&)),
  73             controller, SLOT(requestTab(const QModelIndex&)));
  74     if (KGlobalSettings::singleClick()) {
  75         connect(this, SIGNAL(clicked(const QModelIndex&)),
  76                 controller, SLOT(triggerItem(const QModelIndex&)));
  77     } else {
  78         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  79                 controller, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81
  82     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  83         m_selectionManager = new SelectionManager(this);
  84         connect(m_selectionManager, SIGNAL(selectionChanged()),
  85                 this, SLOT(requestActivation()));
  86         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  87                 m_selectionManager, SLOT(reset()));
  88     }
  89
  90     connect(this, SIGNAL(entered(const QModelIndex&)),
  91             controller, SLOT(emitItemEntered(const QModelIndex&)));
  92     connect(this, SIGNAL(viewportEntered()),
  93             controller, SLOT(emitViewportEntered()));
  94     connect(controller, SIGNAL(nameFilterChanged(const QString&)),
  95             this, SLOT(setNameFilter(const QString&)));
  96     connect(controller, SIGNAL(zoomLevelChanged(int)),
  97             this, SLOT(setZoomLevel(int)));
  98
  99     const DolphinView* view = controller->dolphinView();
 100     connect(view, SIGNAL(showPreviewChanged()),
 101             this, SLOT(slotShowPreviewChanged()));
 102     connect(view, SIGNAL(additionalInfoChanged()),
 103             this, SLOT(slotAdditionalInfoChanged()));
 104
 105     // apply the icons mode settings to the widget
 106     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 107     Q_ASSERT(settings != 0);
 108
 109     if (settings->useSystemFont()) {
 110         m_font = KGlobalSettings::generalFont();
 111     } else {
 112         m_font = QFont(settings->fontFamily(),
 113                        settings->fontSize(),
 114                        settings->fontWeight(),
 115                        settings->italicFont());
 116     }
 117
 118     setWordWrap(settings->numberOfTextlines() > 1);
 119     updateGridSize(view->showPreview(), 0);
 120
 121     if (settings->arrangement() == QListView::TopToBottom) {
 122         setFlow(QListView::LeftToRight);
 123         m_decorationPosition = QStyleOptionViewItem::Top;
 124         m_displayAlignment = Qt::AlignHCenter;
 125     } else {
 126         setFlow(QListView::TopToBottom);
 127         m_decorationPosition = QStyleOptionViewItem::Left;
 128         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 129     }
 130
 131     m_categoryDrawer = new DolphinCategoryDrawer();
 132     setCategoryDrawer(m_categoryDrawer);
 133
 134     setFocus();
 135
 136     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 137             this, SLOT(slotGlobalSettingsChanged(int)));
 138
 139     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 140 }
 141
 142 DolphinIconsView::~DolphinIconsView()
 143 {
 144     delete m_categoryDrawer;
 145     m_categoryDrawer = 0;
 146 }
 147
 148 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 149 {
 150     KCategorizedView::dataChanged(topLeft, bottomRight);
 151
 152     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 153     if (!proxyModel->isCategorizedModel()) {
 154         // bypass a QListView issue that items are not layout correctly if the decoration size of
 155         // an index changes
 156         scheduleDelayedItemsLayout();
 157     }
 158 }
 159
 160 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 161 {
 162     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 163     viewOptions.font = m_font;
 164     viewOptions.decorationPosition = m_decorationPosition;
 165     viewOptions.decorationSize = m_decorationSize;
 166     viewOptions.displayAlignment = m_displayAlignment;
 167     viewOptions.showDecorationSelected = true;
 168     return viewOptions;
 169 }
 170
 171 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 172 {
 173     KCategorizedView::contextMenuEvent(event);
 174     m_controller->triggerContextMenuRequest(event->pos());
 175 }
 176
 177 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 178 {
 179     m_controller->requestActivation();
 180     const QModelIndex index = indexAt(event->pos());
 181     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 182         // TODO: It should not be necessary to manually set the dragging state, but I could
 183         // not reproduce this issue with a Qt-only example yet to find the root cause.
 184         // Issue description: start Dolphin, split the view and drag an item from the
 185         // inactive view to the active view by a very fast mouse movement. Result:
 186         // the item gets selected instead of being dragged...
 187         setState(QAbstractItemView::DraggingState);
 188     }
 189
 190     if (!index.isValid()) {
 191         if (QApplication::mouseButtons() & Qt::MidButton) {
 192             m_controller->replaceUrlByClipboard();
 193         }
 194         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 195         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 196             clearSelection();
 197         }
 198     }
 199
 200     KCategorizedView::mousePressEvent(event);
 201 }
 202
 203 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 204 {
 205     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 206 }
 207
 208 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 209 {
 210     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 211         event->acceptProposedAction();
 212     }
 213 }
 214
 215 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 216 {
 217     Q_UNUSED(event);
 218     setDirtyRegion(m_dropRect);
 219 }
 220
 221 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 222 {
 223     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 224     const QModelIndex index = indexAt(event->pos());
 225     setDirtyRegion(m_dropRect);
 226
 227     m_dropRect.setSize(QSize()); // set as invalid
 228     if (index.isValid()) {
 229         const KFileItem item = m_controller->itemForIndex(index);
 230         if (!item.isNull() && item.isDir()) {
 231             m_dropRect = visualRect(index);
 232         } else {
 233             m_dropRect.setSize(QSize()); // set as invalid
 234         }
 235     }
 236     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 237         // accept url drops, independently from the destination item
 238         event->acceptProposedAction();
 239     }
 240
 241     setDirtyRegion(m_dropRect);
 242 }
 243
 244 void DolphinIconsView::dropEvent(QDropEvent* event)
 245 {
 246     const QModelIndex index = indexAt(event->pos());
 247     const KFileItem item = m_controller->itemForIndex(index);
 248     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 249 }
 250
 251 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 252 {
 253     const QModelIndex oldCurrent = currentIndex();
 254
 255     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 256     if (newCurrent != oldCurrent) {
 257         return newCurrent;
 258     }
 259
 260     // The cursor has not been moved by the base implementation. Provide a
 261     // wrap behavior, so that the cursor will go to the next item when reaching
 262     // the border.
 263     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 264     if (settings->arrangement() == QListView::LeftToRight) {
 265         switch (cursorAction) {
 266         case MoveUp:
 267             if (newCurrent.row() == 0) {
 268                 return newCurrent;
 269             }
 270             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 271             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 272             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 273             break;
 274
 275         case MoveDown:
 276             if (newCurrent.row() == (model()->rowCount() - 1)) {
 277                 return newCurrent;
 278             }
 279             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 280             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 281             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 282             break;
 283
 284         default:
 285             break;
 286         }
 287     } else {
 288         QModelIndex current = oldCurrent;
 289         switch (cursorAction) {
 290         case MoveLeft:
 291             if (newCurrent.row() == 0) {
 292                 return newCurrent;
 293             }
 294             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 295             do {
 296                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 297                 current = newCurrent;
 298                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 299             } while (newCurrent != current);
 300             break;
 301
 302         case MoveRight:
 303             if (newCurrent.row() == (model()->rowCount() - 1)) {
 304                 return newCurrent;
 305             }
 306             do {
 307                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 308                 current = newCurrent;
 309                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 310             } while (newCurrent != current);
 311             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 312             break;
 313
 314         default:
 315             break;
 316         }
 317     }
 318
 319     // Revert all changes of the current item to make sure that item selection works correctly
 320     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 321     return newCurrent;
 322 }
 323
 324 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 325 {
 326     KCategorizedView::keyPressEvent(event);
 327     m_controller->handleKeyPressEvent(event);
 328 }
 329
 330 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 331 {
 332     if (m_selectionManager != 0) {
 333         m_selectionManager->reset();
 334     }
 335
 336     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 337     if (event->modifiers() & Qt::ControlModifier) {
 338         event->ignore();
 339         return;
 340     }
 341
 342     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 343     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 344
 345     KCategorizedView::wheelEvent(event);
 346     // if the icons are aligned left to right, the vertical wheel event should
 347     // be applied to the horizontal scrollbar
 348     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 349     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 350                                   (settings->arrangement() == QListView::LeftToRight);
 351     if (scrollHorizontal) {
 352         QWheelEvent horizEvent(event->pos(),
 353                                event->delta(),
 354                                event->buttons(),
 355                                event->modifiers(),
 356                                Qt::Horizontal);
 357         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 358     }
 359 }
 360
 361 void DolphinIconsView::showEvent(QShowEvent* event)
 362 {
 363     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 364     delegate->setMaximumSize(m_itemSize);
 365
 366     KCategorizedView::showEvent(event);
 367 }
 368
 369 void DolphinIconsView::leaveEvent(QEvent* event)
 370 {
 371     KCategorizedView::leaveEvent(event);
 372     // if the mouse is above an item and moved very fast outside the widget,
 373     // no viewportEntered() signal might be emitted although the mouse has been moved
 374     // above the viewport
 375     m_controller->emitViewportEntered();
 376 }
 377
 378 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 379 {
 380     KCategorizedView::currentChanged(current, previous);
 381     m_autoScroller->handleCurrentIndexChange(current, previous);
 382 }
 383
 384 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 385 {
 386     KCategorizedView::resizeEvent(event);
 387     const DolphinView* view = m_controller->dolphinView();
 388     updateGridSize(view->showPreview(), view->additionalInfo().count());
 389 }
 390
 391 void DolphinIconsView::slotShowPreviewChanged()
 392 {
 393     const DolphinView* view = m_controller->dolphinView();
 394     updateGridSize(view->showPreview(), additionalInfoCount());
 395 }
 396
 397 void DolphinIconsView::slotAdditionalInfoChanged()
 398 {
 399     const DolphinView* view = m_controller->dolphinView();
 400     const bool showPreview = view->showPreview();
 401     updateGridSize(showPreview, view->additionalInfo().count());
 402 }
 403
 404 void DolphinIconsView::setNameFilter(const QString& nameFilter)
 405 {
 406     DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(model());
 407     proxyModel->setFilterRegExp(nameFilter);
 408 }
 409
 410 void DolphinIconsView::setZoomLevel(int level)
 411 {
 412     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 413
 414     const int oldIconSize = settings->iconSize();
 415     int newIconSize = oldIconSize;
 416
 417     const bool showPreview = m_controller->dolphinView()->showPreview();
 418     if (showPreview) {
 419         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 420         settings->setPreviewSize(previewSize);
 421     } else {
 422         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 423         settings->setIconSize(newIconSize);
 424     }
 425
 426     // increase also the grid size
 427     const int diff = newIconSize - oldIconSize;
 428     settings->setItemWidth(settings->itemWidth() + diff);
 429     settings->setItemHeight(settings->itemHeight() + diff);
 430
 431     updateGridSize(showPreview, additionalInfoCount());
 432 }
 433
 434 void DolphinIconsView::requestActivation()
 435 {
 436     m_controller->requestActivation();
 437 }
 438
 439 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 440 {
 441     Q_UNUSED(category);
 442
 443     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 444     Q_ASSERT(settings != 0);
 445     if (settings->useSystemFont()) {
 446         m_font = KGlobalSettings::generalFont();
 447     }
 448
 449     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 450     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 451     if (KGlobalSettings::singleClick()) {
 452         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 453     } else {
 454         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 455     }
 456 }
 457
 458 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 459 {
 460     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 461     Q_ASSERT(settings != 0);
 462
 463     int itemWidth = settings->itemWidth();
 464     int itemHeight = settings->itemHeight();
 465     int size = settings->iconSize();
 466
 467     if (showPreview) {
 468         const int previewSize = settings->previewSize();
 469         const int diff = previewSize - size;
 470         itemWidth  += diff;
 471         itemHeight += diff;
 472
 473         size = previewSize;
 474     }
 475
 476     Q_ASSERT(additionalInfoCount >= 0);
 477     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 478
 479     // Optimize the item size of the grid in a way to prevent large gaps on the
 480     // right border (= row arrangement) or the bottom border (= column arrangement).
 481     // There is no public API in QListView to find out the used width of the viewport
 482     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 483     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 484     int frameAroundContents = 0;
 485     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 486         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 487     }
 488     const int spacing = settings->gridSpacing();
 489     if (settings->arrangement() == QListView::TopToBottom) {
 490         const int contentWidth = viewport()->width() - 1
 491                                  - frameAroundContents
 492                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 493         const int gridWidth = itemWidth + spacing * 2;
 494         const int horizItemCount = contentWidth / gridWidth;
 495         if (horizItemCount > 0) {
 496             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 497         }
 498
 499         // The decoration width indirectly defines the maximum
 500         // width for the text wrapping. To use the maximum item width
 501         // for text wrapping, it is used as decoration width.
 502         m_decorationSize = QSize(itemWidth, size);
 503         setIconSize(QSize(itemWidth, size));
 504     } else {
 505         const int contentHeight = viewport()->height() - 1
 506                                   - frameAroundContents
 507                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 508         const int gridHeight = itemHeight + spacing;
 509         const int vertItemCount = contentHeight / gridHeight;
 510         if (vertItemCount > 0) {
 511             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 512         }
 513
 514         m_decorationSize = QSize(size, size);
 515         setIconSize(QSize(size, size));
 516     }
 517
 518     m_itemSize = QSize(itemWidth, itemHeight);
 519     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 520
 521     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 522     if (delegate != 0) {
 523         delegate->setMaximumSize(m_itemSize);
 524     }
 525
 526     if (m_selectionManager != 0) {
 527         m_selectionManager->reset();
 528     }
 529 }
 530
 531 int DolphinIconsView::additionalInfoCount() const
 532 {
 533     const DolphinView* view = m_controller->dolphinView();
 534     return view->additionalInfo().count();
 535 }
 536
 537 #include "dolphiniconsview.moc"