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