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