src/views/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 "dolphinviewcontroller.h"
  24 #include "settings/dolphinsettings.h"
  25 #include "dolphinsortfilterproxymodel.h"
  26 #include "dolphin_iconsmodesettings.h"
  27 #include "dolphin_generalsettings.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "viewextensionsfactory.h"
  31 #include "viewmodecontroller.h"
  32 #include "zoomlevelinfo.h"
  33
  34 #include <kcategorizedsortfilterproxymodel.h>
  35 #include <kdialog.h>
  36 #include <kfileitemdelegate.h>
  37
  38 #include <QAbstractProxyModel>
  39 #include <QApplication>
  40 #include <QScrollBar>
  41
  42 DolphinIconsView::DolphinIconsView(QWidget* parent,
  43                                    DolphinViewController* dolphinViewController,
  44                                    const ViewModeController* viewModeController,
  45                                    DolphinSortFilterProxyModel* proxyModel) :
  46     KCategorizedView(parent),
  47     m_dolphinViewController(dolphinViewController),
  48     m_viewModeController(viewModeController),
  49     m_categoryDrawer(new DolphinCategoryDrawer(this)),
  50     m_extensionsFactory(0),
  51     m_font(),
  52     m_decorationSize(),
  53     m_decorationPosition(QStyleOptionViewItem::Top),
  54     m_displayAlignment(Qt::AlignHCenter),
  55     m_itemSize(),
  56     m_dropRect()
  57 {
  58     Q_ASSERT(dolphinViewController != 0);
  59     Q_ASSERT(viewModeController != 0);
  60
  61     setModel(proxyModel);
  62     setLayoutDirection(Qt::LeftToRight);
  63     setViewMode(QListView::IconMode);
  64     setResizeMode(QListView::Adjust);
  65     setMovement(QListView::Static);
  66     setDragEnabled(true);
  67     setEditTriggers(QAbstractItemView::NoEditTriggers);
  68     viewport()->setAcceptDrops(true);
  69
  70     setMouseTracking(true);
  71
  72     connect(this, SIGNAL(clicked(const QModelIndex&)),
  73             dolphinViewController, SLOT(requestTab(const QModelIndex&)));
  74     if (KGlobalSettings::singleClick()) {
  75         connect(this, SIGNAL(clicked(const QModelIndex&)),
  76                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
  77     } else {
  78         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  79                 dolphinViewController, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81
  82     connect(this, SIGNAL(entered(const QModelIndex&)),
  83             dolphinViewController, SLOT(emitItemEntered(const QModelIndex&)));
  84     connect(this, SIGNAL(viewportEntered()),
  85             dolphinViewController, SLOT(emitViewportEntered()));
  86     connect(viewModeController, SIGNAL(zoomLevelChanged(int)),
  87             this, SLOT(setZoomLevel(int)));
  88
  89     const DolphinView* view = dolphinViewController->view();
  90     connect(view, SIGNAL(showPreviewChanged()),
  91             this, SLOT(slotShowPreviewChanged()));
  92     connect(view, SIGNAL(additionalInfoChanged()),
  93             this, SLOT(slotAdditionalInfoChanged()));
  94
  95     // apply the icons mode settings to the widget
  96     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  97     Q_ASSERT(settings != 0);
  98
  99     if (settings->useSystemFont()) {
 100         m_font = KGlobalSettings::generalFont();
 101     } else {
 102         m_font = QFont(settings->fontFamily(),
 103                        qRound(settings->fontSize()),
 104                        settings->fontWeight(),
 105                        settings->italicFont());
 106         m_font.setPointSizeF(settings->fontSize());
 107     }
 108
 109     setWordWrap(settings->numberOfTextlines() > 1);
 110
 111     if (settings->arrangement() == QListView::TopToBottom) {
 112         setFlow(QListView::LeftToRight);
 113         m_decorationPosition = QStyleOptionViewItem::Top;
 114         m_displayAlignment = Qt::AlignHCenter;
 115     } else {
 116         setFlow(QListView::TopToBottom);
 117         m_decorationPosition = QStyleOptionViewItem::Left;
 118         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 119     }
 120
 121     connect(m_categoryDrawer, SIGNAL(actionRequested(int,QModelIndex)), this, SLOT(categoryDrawerActionRequested(int,QModelIndex)));
 122     setCategoryDrawer(m_categoryDrawer);
 123
 124     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 125             this, SLOT(slotGlobalSettingsChanged(int)));
 126
 127     updateGridSize(view->showPreview(), 0);
 128     m_extensionsFactory = new ViewExtensionsFactory(this, dolphinViewController, viewModeController);
 129
 130     // setFocus() must be called after m_extensionsFactory is initialised (see bug 240374).
 131     setFocus();
 132 }
 133
 134 DolphinIconsView::~DolphinIconsView()
 135 {
 136 }
 137
 138 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 139 {
 140     KCategorizedView::dataChanged(topLeft, bottomRight);
 141
 142     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 143     if (!proxyModel->isCategorizedModel()) {
 144         // bypass a QListView issue that items are not layout correctly if the decoration size of
 145         // an index changes
 146         scheduleDelayedItemsLayout();
 147     }
 148 }
 149
 150 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 151 {
 152     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 153     viewOptions.font = m_font;
 154     viewOptions.fontMetrics = QFontMetrics(m_font);
 155     viewOptions.decorationPosition = m_decorationPosition;
 156     viewOptions.decorationSize = m_decorationSize;
 157     viewOptions.displayAlignment = m_displayAlignment;
 158     viewOptions.showDecorationSelected = true;
 159     return viewOptions;
 160 }
 161
 162 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 163 {
 164     KCategorizedView::contextMenuEvent(event);
 165     m_dolphinViewController->triggerContextMenuRequest(event->pos());
 166 }
 167
 168 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 169 {
 170     m_dolphinViewController->requestActivation();
 171     const QModelIndex index = indexAt(event->pos());
 172     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 173         // TODO: It should not be necessary to manually set the dragging state, but I could
 174         // not reproduce this issue with a Qt-only example yet to find the root cause.
 175         // Issue description: start Dolphin, split the view and drag an item from the
 176         // inactive view to the active view by a very fast mouse movement. Result:
 177         // the item gets selected instead of being dragged...
 178         setState(QAbstractItemView::DraggingState);
 179     }
 180
 181     if (!index.isValid() && (QApplication::mouseButtons() & Qt::MidButton)) {
 182          m_dolphinViewController->replaceUrlByClipboard();
 183     }
 184
 185     KCategorizedView::mousePressEvent(event);
 186 }
 187
 188 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 189 {
 190     DragAndDropHelper::instance().startDrag(this, supportedActions, m_dolphinViewController);
 191 }
 192
 193 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 194 {
 195     event->acceptProposedAction();
 196 }
 197
 198 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 199 {
 200     KCategorizedView::dragLeaveEvent(event);
 201     setDirtyRegion(m_dropRect);
 202 }
 203
 204 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 205 {
 206     KCategorizedView::dragMoveEvent(event);
 207
 208     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 209     const QModelIndex index = indexAt(event->pos());
 210     setDirtyRegion(m_dropRect);
 211
 212     m_dropRect.setSize(QSize()); // set as invalid
 213     if (index.isValid()) {
 214         const KFileItem item = m_dolphinViewController->itemForIndex(index);
 215         if (!item.isNull() && item.isDir()) {
 216             m_dropRect = visualRect(index);
 217         } else {
 218             m_dropRect.setSize(QSize()); // set as invalid
 219         }
 220     }
 221     event->acceptProposedAction();
 222
 223     setDirtyRegion(m_dropRect);
 224 }
 225
 226 void DolphinIconsView::dropEvent(QDropEvent* event)
 227 {
 228     const QModelIndex index = indexAt(event->pos());
 229     const KFileItem item = m_dolphinViewController->itemForIndex(index);
 230     m_dolphinViewController->indicateDroppedUrls(item, m_viewModeController->url(), event);
 231     // don't call KCategorizedView::dropEvent(event), as it moves
 232     // the items which is not wanted
 233 }
 234
 235 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 236 {
 237     const QModelIndex oldCurrent = currentIndex();
 238
 239     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 240     if (newCurrent != oldCurrent) {
 241         return newCurrent;
 242     }
 243
 244     // The cursor has not been moved by the base implementation. Provide a
 245     // wrap behavior, so that the cursor will go to the next item when reaching
 246     // the border.
 247     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 248     if (settings->arrangement() == QListView::LeftToRight) {
 249         switch (cursorAction) {
 250         case MoveUp:
 251             if (newCurrent.row() == 0) {
 252                 return newCurrent;
 253             }
 254             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 255             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 256             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 257             break;
 258
 259         case MoveDown:
 260             if (newCurrent.row() == (model()->rowCount() - 1)) {
 261                 return newCurrent;
 262             }
 263             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 264             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 265             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 266             break;
 267
 268         default:
 269             break;
 270         }
 271     } else {
 272         QModelIndex current = oldCurrent;
 273         switch (cursorAction) {
 274         case MoveLeft:
 275             if (newCurrent.row() == 0) {
 276                 return newCurrent;
 277             }
 278             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 279             do {
 280                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 281                 current = newCurrent;
 282                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 283             } while (newCurrent != current);
 284             break;
 285
 286         case MoveRight:
 287             if (newCurrent.row() == (model()->rowCount() - 1)) {
 288                 return newCurrent;
 289             }
 290             do {
 291                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 292                 current = newCurrent;
 293                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 294             } while (newCurrent != current);
 295             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 296             break;
 297
 298         default:
 299             break;
 300         }
 301     }
 302
 303     // Revert all changes of the current item to make sure that item selection works correctly
 304     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 305     return newCurrent;
 306 }
 307
 308 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 309 {
 310     KCategorizedView::keyPressEvent(event);
 311     m_dolphinViewController->handleKeyPressEvent(event);
 312 }
 313
 314 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 315 {
 316     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 5);
 317     verticalScrollBar()->setSingleStep(m_itemSize.height() / 5);
 318
 319     KCategorizedView::wheelEvent(event);
 320     // if the icons are aligned left to right, the vertical wheel event should
 321     // be applied to the horizontal scrollbar
 322     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 323     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 324                                   (settings->arrangement() == QListView::LeftToRight);
 325     if (scrollHorizontal) {
 326         QWheelEvent horizEvent(event->pos(),
 327                                event->delta(),
 328                                event->buttons(),
 329                                event->modifiers(),
 330                                Qt::Horizontal);
 331         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 332     }
 333 }
 334
 335 void DolphinIconsView::showEvent(QShowEvent* event)
 336 {
 337     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 338     delegate->setMaximumSize(m_itemSize);
 339
 340     KCategorizedView::showEvent(event);
 341 }
 342
 343 void DolphinIconsView::leaveEvent(QEvent* event)
 344 {
 345     KCategorizedView::leaveEvent(event);
 346     // if the mouse is above an item and moved very fast outside the widget,
 347     // no viewportEntered() signal might be emitted although the mouse has been moved
 348     // above the viewport
 349     m_dolphinViewController->emitViewportEntered();
 350 }
 351
 352 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 353 {
 354     KCategorizedView::currentChanged(current, previous);
 355     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 356 }
 357
 358 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 359 {
 360     KCategorizedView::resizeEvent(event);
 361     const DolphinView* view = m_dolphinViewController->view();
 362     updateGridSize(view->showPreview(), view->additionalInfo().count());
 363 }
 364
 365 void DolphinIconsView::slotShowPreviewChanged()
 366 {
 367     const DolphinView* view = m_dolphinViewController->view();
 368     updateGridSize(view->showPreview(), additionalInfoCount());
 369 }
 370
 371 void DolphinIconsView::slotAdditionalInfoChanged()
 372 {
 373     const DolphinView* view = m_dolphinViewController->view();
 374     const bool showPreview = view->showPreview();
 375     updateGridSize(showPreview, view->additionalInfo().count());
 376 }
 377
 378 void DolphinIconsView::setZoomLevel(int level)
 379 {
 380     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 381
 382     const int oldIconSize = settings->iconSize();
 383     int newIconSize = oldIconSize;
 384
 385     const bool showPreview = m_dolphinViewController->view()->showPreview();
 386     if (showPreview) {
 387         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 388         settings->setPreviewSize(previewSize);
 389     } else {
 390         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 391         settings->setIconSize(newIconSize);
 392     }
 393
 394     // increase also the grid size
 395     const int diff = newIconSize - oldIconSize;
 396     settings->setItemWidth(settings->itemWidth() + diff);
 397     settings->setItemHeight(settings->itemHeight() + diff);
 398
 399     updateGridSize(showPreview, additionalInfoCount());
 400 }
 401
 402 void DolphinIconsView::requestActivation()
 403 {
 404     m_dolphinViewController->requestActivation();
 405 }
 406
 407 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 408 {
 409     Q_UNUSED(category);
 410
 411     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 412     Q_ASSERT(settings != 0);
 413     if (settings->useSystemFont()) {
 414         m_font = KGlobalSettings::generalFont();
 415     }
 416
 417     disconnect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 418     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 419     if (KGlobalSettings::singleClick()) {
 420         connect(this, SIGNAL(clicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 421     } else {
 422         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_dolphinViewController, SLOT(triggerItem(QModelIndex)));
 423     }
 424 }
 425
 426 void DolphinIconsView::categoryDrawerActionRequested(int action, const QModelIndex &index)
 427 {
 428     const QSortFilterProxyModel *model = dynamic_cast<const QSortFilterProxyModel*>(index.model());
 429     const QModelIndex topLeft = model->index(index.row(), modelColumn());
 430     QModelIndex bottomRight = topLeft;
 431     const QString category = model->data(index, KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 432     QModelIndex current = topLeft;
 433     while (true) {
 434         current = model->index(current.row() + 1, modelColumn());
 435         const QString curCategory = model->data(model->index(current.row(), index.column()), KCategorizedSortFilterProxyModel::CategoryDisplayRole).toString();
 436         if (!current.isValid() || category != curCategory) {
 437             break;
 438         }
 439         bottomRight = current;
 440     }
 441     switch (action) {
 442         case DolphinCategoryDrawer::SelectAll:
 443             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Select);
 444             break;
 445         case DolphinCategoryDrawer::UnselectAll:
 446             selectionModel()->select(QItemSelection(topLeft, bottomRight), QItemSelectionModel::Deselect);
 447             break;
 448         default:
 449             break;
 450     }
 451 }
 452
 453 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 454 {
 455     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 456     Q_ASSERT(settings != 0);
 457
 458     int itemWidth = settings->itemWidth();
 459     int itemHeight = settings->itemHeight();
 460     int size = settings->iconSize();
 461
 462     if (showPreview) {
 463         const int previewSize = settings->previewSize();
 464         const int diff = previewSize - size;
 465         itemWidth  += diff;
 466         itemHeight += diff;
 467
 468         size = previewSize;
 469     }
 470
 471     Q_ASSERT(additionalInfoCount >= 0);
 472     itemHeight += additionalInfoCount * QFontMetrics(m_font).height();
 473
 474     // Optimize the item size of the grid in a way to prevent large gaps on the
 475     // right border (= row arrangement) or the bottom border (= column arrangement).
 476     // There is no public API in QListView to find out the used width of the viewport
 477     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 478     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 479     int frameAroundContents = 0;
 480     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 481         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 482     }
 483     const int spacing = settings->gridSpacing();
 484     if (settings->arrangement() == QListView::TopToBottom) {
 485         const int contentWidth = viewport()->width() - 1
 486                                  - frameAroundContents
 487                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 488         const int gridWidth = itemWidth + spacing * 2;
 489         const int horizItemCount = contentWidth / gridWidth;
 490         if (horizItemCount > 0) {
 491             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 492         }
 493
 494         // The decoration width indirectly defines the maximum
 495         // width for the text wrapping. To use the maximum item width
 496         // for text wrapping, it is used as decoration width.
 497         m_decorationSize = QSize(itemWidth, size);
 498         setIconSize(QSize(itemWidth, size));
 499     } else {
 500         const int contentHeight = viewport()->height() - 1
 501                                   - frameAroundContents
 502                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 503         const int gridHeight = itemHeight + spacing;
 504         const int vertItemCount = contentHeight / gridHeight;
 505         if (vertItemCount > 0) {
 506             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 507         }
 508
 509         m_decorationSize = QSize(size, size);
 510         setIconSize(QSize(size, size));
 511     }
 512
 513     m_itemSize = QSize(itemWidth, itemHeight);
 514     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 515
 516     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 517     if (delegate != 0) {
 518         delegate->setMaximumSize(m_itemSize);
 519     }
 520 }
 521
 522 int DolphinIconsView::additionalInfoCount() const
 523 {
 524     const DolphinView* view = m_dolphinViewController->view();
 525     return view->additionalInfo().count();
 526 }
 527
 528 #include "dolphiniconsview.moc"