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 <kdirmodel.h>
  36 #include <kfileitemdelegate.h>
  37
  38 #include <QAbstractProxyModel>
  39 #include <QApplication>
  40 #include <QScrollBar>
  41
  42 DolphinIconsView::DolphinIconsView(QWidget* parent,
  43                                    DolphinController* controller,
  44                                    DolphinSortFilterProxyModel* proxyModel) :
  45     KCategorizedView(parent),
  46     m_controller(controller),
  47     m_categoryDrawer(0),
  48     m_extensionsFactory(0),
  49     m_font(),
  50     m_decorationSize(),
  51     m_decorationPosition(QStyleOptionViewItem::Top),
  52     m_displayAlignment(Qt::AlignHCenter),
  53     m_itemSize(),
  54     m_dropRect()
  55 {
  56     Q_ASSERT(controller != 0);
  57     setModel(proxyModel);
  58     setLayoutDirection(Qt::LeftToRight);
  59     setViewMode(QListView::IconMode);
  60     setResizeMode(QListView::Adjust);
  61     setMovement(QListView::Static);
  62     setDragEnabled(true);
  63     setEditTriggers(QAbstractItemView::NoEditTriggers);
  64     viewport()->setAcceptDrops(true);
  65
  66     setMouseTracking(true);
  67
  68     connect(this, SIGNAL(clicked(const QModelIndex&)),
  69             controller, SLOT(requestTab(const QModelIndex&)));
  70     if (KGlobalSettings::singleClick()) {
  71         connect(this, SIGNAL(clicked(const QModelIndex&)),
  72                 controller, SLOT(triggerItem(const QModelIndex&)));
  73     } else {
  74         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  75                 controller, SLOT(triggerItem(const QModelIndex&)));
  76     }
  77
  78     connect(this, SIGNAL(entered(const QModelIndex&)),
  79             controller, SLOT(emitItemEntered(const QModelIndex&)));
  80     connect(this, SIGNAL(viewportEntered()),
  81             controller, SLOT(emitViewportEntered()));
  82     connect(controller, SIGNAL(nameFilterChanged(const QString&)),
  83             this, SLOT(setNameFilter(const QString&)));
  84     connect(controller, SIGNAL(zoomLevelChanged(int)),
  85             this, SLOT(setZoomLevel(int)));
  86
  87     const DolphinView* view = controller->dolphinView();
  88     connect(view, SIGNAL(showPreviewChanged()),
  89             this, SLOT(slotShowPreviewChanged()));
  90     connect(view, SIGNAL(additionalInfoChanged()),
  91             this, SLOT(slotAdditionalInfoChanged()));
  92
  93     // apply the icons mode settings to the widget
  94     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  95     Q_ASSERT(settings != 0);
  96
  97     if (settings->useSystemFont()) {
  98         m_font = KGlobalSettings::generalFont();
  99     } else {
 100         m_font = QFont(settings->fontFamily(),
 101                        settings->fontSize(),
 102                        settings->fontWeight(),
 103                        settings->italicFont());
 104     }
 105
 106     setWordWrap(settings->numberOfTextlines() > 1);
 107
 108     if (settings->arrangement() == QListView::TopToBottom) {
 109         setFlow(QListView::LeftToRight);
 110         m_decorationPosition = QStyleOptionViewItem::Top;
 111         m_displayAlignment = Qt::AlignHCenter;
 112     } else {
 113         setFlow(QListView::TopToBottom);
 114         m_decorationPosition = QStyleOptionViewItem::Left;
 115         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 116     }
 117
 118     m_categoryDrawer = new DolphinCategoryDrawer();
 119     setCategoryDrawer(m_categoryDrawer);
 120
 121     setFocus();
 122
 123     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 124             this, SLOT(slotGlobalSettingsChanged(int)));
 125
 126     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 127     updateGridSize(view->showPreview(), 0);
 128 }
 129
 130 DolphinIconsView::~DolphinIconsView()
 131 {
 132     delete m_categoryDrawer;
 133     m_categoryDrawer = 0;
 134 }
 135
 136 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 137 {
 138     KCategorizedView::dataChanged(topLeft, bottomRight);
 139
 140     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 141     if (!proxyModel->isCategorizedModel()) {
 142         // bypass a QListView issue that items are not layout correctly if the decoration size of
 143         // an index changes
 144         scheduleDelayedItemsLayout();
 145     }
 146 }
 147
 148 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 149 {
 150     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 151     viewOptions.font = 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_controller->triggerContextMenuRequest(event->pos());
 163 }
 164
 165 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 166 {
 167     m_controller->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()) {
 179         if (QApplication::mouseButtons() & Qt::MidButton) {
 180             m_controller->replaceUrlByClipboard();
 181         }
 182         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 183         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 184             clearSelection();
 185         }
 186     }
 187
 188     KCategorizedView::mousePressEvent(event);
 189 }
 190
 191 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 192 {
 193     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 194 }
 195
 196 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 197 {
 198     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 199         event->acceptProposedAction();
 200     }
 201 }
 202
 203 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 204 {
 205     Q_UNUSED(event);
 206     setDirtyRegion(m_dropRect);
 207 }
 208
 209 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 210 {
 211     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 212     const QModelIndex index = indexAt(event->pos());
 213     setDirtyRegion(m_dropRect);
 214
 215     m_dropRect.setSize(QSize()); // set as invalid
 216     if (index.isValid()) {
 217         const KFileItem item = m_controller->itemForIndex(index);
 218         if (!item.isNull() && item.isDir()) {
 219             m_dropRect = visualRect(index);
 220         } else {
 221             m_dropRect.setSize(QSize()); // set as invalid
 222         }
 223     }
 224     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 225         // accept url drops, independently from the destination item
 226         event->acceptProposedAction();
 227     }
 228
 229     setDirtyRegion(m_dropRect);
 230 }
 231
 232 void DolphinIconsView::dropEvent(QDropEvent* event)
 233 {
 234     const QModelIndex index = indexAt(event->pos());
 235     const KFileItem item = m_controller->itemForIndex(index);
 236     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 237 }
 238
 239 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 240 {
 241     const QModelIndex oldCurrent = currentIndex();
 242
 243     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 244     if (newCurrent != oldCurrent) {
 245         return newCurrent;
 246     }
 247
 248     // The cursor has not been moved by the base implementation. Provide a
 249     // wrap behavior, so that the cursor will go to the next item when reaching
 250     // the border.
 251     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 252     if (settings->arrangement() == QListView::LeftToRight) {
 253         switch (cursorAction) {
 254         case MoveUp:
 255             if (newCurrent.row() == 0) {
 256                 return newCurrent;
 257             }
 258             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 259             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 260             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 261             break;
 262
 263         case MoveDown:
 264             if (newCurrent.row() == (model()->rowCount() - 1)) {
 265                 return newCurrent;
 266             }
 267             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 268             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 269             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 270             break;
 271
 272         default:
 273             break;
 274         }
 275     } else {
 276         QModelIndex current = oldCurrent;
 277         switch (cursorAction) {
 278         case MoveLeft:
 279             if (newCurrent.row() == 0) {
 280                 return newCurrent;
 281             }
 282             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 283             do {
 284                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 285                 current = newCurrent;
 286                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 287             } while (newCurrent != current);
 288             break;
 289
 290         case MoveRight:
 291             if (newCurrent.row() == (model()->rowCount() - 1)) {
 292                 return newCurrent;
 293             }
 294             do {
 295                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 296                 current = newCurrent;
 297                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 298             } while (newCurrent != current);
 299             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 300             break;
 301
 302         default:
 303             break;
 304         }
 305     }
 306
 307     // Revert all changes of the current item to make sure that item selection works correctly
 308     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 309     return newCurrent;
 310 }
 311
 312 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 313 {
 314     KCategorizedView::keyPressEvent(event);
 315     m_controller->handleKeyPressEvent(event);
 316 }
 317
 318 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 319 {
 320     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 321     if (event->modifiers() & Qt::ControlModifier) {
 322         event->ignore();
 323         return;
 324     }
 325
 326     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 327     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 328
 329     KCategorizedView::wheelEvent(event);
 330     // if the icons are aligned left to right, the vertical wheel event should
 331     // be applied to the horizontal scrollbar
 332     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 333     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 334                                   (settings->arrangement() == QListView::LeftToRight);
 335     if (scrollHorizontal) {
 336         QWheelEvent horizEvent(event->pos(),
 337                                event->delta(),
 338                                event->buttons(),
 339                                event->modifiers(),
 340                                Qt::Horizontal);
 341         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 342     }
 343 }
 344
 345 void DolphinIconsView::showEvent(QShowEvent* event)
 346 {
 347     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 348     delegate->setMaximumSize(m_itemSize);
 349
 350     KCategorizedView::showEvent(event);
 351 }
 352
 353 void DolphinIconsView::leaveEvent(QEvent* event)
 354 {
 355     KCategorizedView::leaveEvent(event);
 356     // if the mouse is above an item and moved very fast outside the widget,
 357     // no viewportEntered() signal might be emitted although the mouse has been moved
 358     // above the viewport
 359     m_controller->emitViewportEntered();
 360 }
 361
 362 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 363 {
 364     KCategorizedView::currentChanged(current, previous);
 365     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 366 }
 367
 368 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 369 {
 370     KCategorizedView::resizeEvent(event);
 371     const DolphinView* view = m_controller->dolphinView();
 372     updateGridSize(view->showPreview(), view->additionalInfo().count());
 373 }
 374
 375 void DolphinIconsView::slotShowPreviewChanged()
 376 {
 377     const DolphinView* view = m_controller->dolphinView();
 378     updateGridSize(view->showPreview(), additionalInfoCount());
 379 }
 380
 381 void DolphinIconsView::slotAdditionalInfoChanged()
 382 {
 383     const DolphinView* view = m_controller->dolphinView();
 384     const bool showPreview = view->showPreview();
 385     updateGridSize(showPreview, view->additionalInfo().count());
 386 }
 387
 388 void DolphinIconsView::setNameFilter(const QString& nameFilter)
 389 {
 390     DolphinSortFilterProxyModel* proxyModel = static_cast<DolphinSortFilterProxyModel*>(model());
 391     proxyModel->setFilterRegExp(nameFilter);
 392 }
 393
 394 void DolphinIconsView::setZoomLevel(int level)
 395 {
 396     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 397
 398     const int oldIconSize = settings->iconSize();
 399     int newIconSize = oldIconSize;
 400
 401     const bool showPreview = m_controller->dolphinView()->showPreview();
 402     if (showPreview) {
 403         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 404         settings->setPreviewSize(previewSize);
 405     } else {
 406         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 407         settings->setIconSize(newIconSize);
 408     }
 409
 410     // increase also the grid size
 411     const int diff = newIconSize - oldIconSize;
 412     settings->setItemWidth(settings->itemWidth() + diff);
 413     settings->setItemHeight(settings->itemHeight() + diff);
 414
 415     updateGridSize(showPreview, additionalInfoCount());
 416 }
 417
 418 void DolphinIconsView::requestActivation()
 419 {
 420     m_controller->requestActivation();
 421 }
 422
 423 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 424 {
 425     Q_UNUSED(category);
 426
 427     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 428     Q_ASSERT(settings != 0);
 429     if (settings->useSystemFont()) {
 430         m_font = KGlobalSettings::generalFont();
 431     }
 432
 433     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 434     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 435     if (KGlobalSettings::singleClick()) {
 436         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 437     } else {
 438         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 439     }
 440 }
 441
 442 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 443 {
 444     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 445     Q_ASSERT(settings != 0);
 446
 447     int itemWidth = settings->itemWidth();
 448     int itemHeight = settings->itemHeight();
 449     int size = settings->iconSize();
 450
 451     if (showPreview) {
 452         const int previewSize = settings->previewSize();
 453         const int diff = previewSize - size;
 454         itemWidth  += diff;
 455         itemHeight += diff;
 456
 457         size = previewSize;
 458     }
 459
 460     Q_ASSERT(additionalInfoCount >= 0);
 461     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 462
 463     // Optimize the item size of the grid in a way to prevent large gaps on the
 464     // right border (= row arrangement) or the bottom border (= column arrangement).
 465     // There is no public API in QListView to find out the used width of the viewport
 466     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 467     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 468     int frameAroundContents = 0;
 469     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 470         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 471     }
 472     const int spacing = settings->gridSpacing();
 473     if (settings->arrangement() == QListView::TopToBottom) {
 474         const int contentWidth = viewport()->width() - 1
 475                                  - frameAroundContents
 476                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 477         const int gridWidth = itemWidth + spacing * 2;
 478         const int horizItemCount = contentWidth / gridWidth;
 479         if (horizItemCount > 0) {
 480             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 481         }
 482
 483         // The decoration width indirectly defines the maximum
 484         // width for the text wrapping. To use the maximum item width
 485         // for text wrapping, it is used as decoration width.
 486         m_decorationSize = QSize(itemWidth, size);
 487         setIconSize(QSize(itemWidth, size));
 488     } else {
 489         const int contentHeight = viewport()->height() - 1
 490                                   - frameAroundContents
 491                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 492         const int gridHeight = itemHeight + spacing;
 493         const int vertItemCount = contentHeight / gridHeight;
 494         if (vertItemCount > 0) {
 495             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 496         }
 497
 498         m_decorationSize = QSize(size, size);
 499         setIconSize(QSize(size, size));
 500     }
 501
 502     m_itemSize = QSize(itemWidth, itemHeight);
 503     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 504
 505     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 506     if (delegate != 0) {
 507         delegate->setMaximumSize(m_itemSize);
 508     }
 509 }
 510
 511 int DolphinIconsView::additionalInfoCount() const
 512 {
 513     const DolphinView* view = m_controller->dolphinView();
 514     return view->additionalInfo().count();
 515 }
 516
 517 #include "dolphiniconsview.moc"