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