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