src/dolphiniconsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 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 "dolphinviewautoscroller.h"
  26 #include "dolphin_iconsmodesettings.h"
  27 #include "dolphin_generalsettings.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "zoomlevelinfo.h"
  31
  32 #include <kcategorizedsortfilterproxymodel.h>
  33 #include <kdialog.h>
  34 #include <kdirmodel.h>
  35 #include <kfileitemdelegate.h>
  36
  37 #include <QAbstractProxyModel>
  38 #include <QApplication>
  39 #include <QScrollBar>
  40
  41 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  42     KCategorizedView(parent),
  43     m_controller(controller),
  44     m_selectionManager(0),
  45     m_autoScroller(0),
  46     m_categoryDrawer(0),
  47     m_font(),
  48     m_decorationSize(),
  49     m_decorationPosition(QStyleOptionViewItem::Top),
  50     m_displayAlignment(Qt::AlignHCenter),
  51     m_itemSize(),
  52     m_dropRect()
  53 {
  54     Q_ASSERT(controller != 0);
  55     setLayoutDirection(Qt::LeftToRight);
  56     setViewMode(QListView::IconMode);
  57     setResizeMode(QListView::Adjust);
  58     setMovement(QListView::Static);
  59     setDragEnabled(true);
  60     setEditTriggers(QAbstractItemView::NoEditTriggers);
  61     viewport()->setAcceptDrops(true);
  62
  63     setMouseTracking(true);
  64     m_autoScroller = new DolphinViewAutoScroller(this);
  65
  66     connect(this, SIGNAL(clicked(const QModelIndex&)),
  67             controller, SLOT(requestTab(const QModelIndex&)));
  68     if (KGlobalSettings::singleClick()) {
  69         connect(this, SIGNAL(clicked(const QModelIndex&)),
  70                 controller, SLOT(triggerItem(const QModelIndex&)));
  71     } else {
  72         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  73                 controller, SLOT(triggerItem(const QModelIndex&)));
  74     }
  75
  76     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  77         m_selectionManager = new SelectionManager(this);
  78         connect(m_selectionManager, SIGNAL(selectionChanged()),
  79                 this, SLOT(requestActivation()));
  80         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  81                 m_selectionManager, SLOT(reset()));
  82     }
  83
  84     connect(this, SIGNAL(entered(const QModelIndex&)),
  85             controller, SLOT(emitItemEntered(const QModelIndex&)));
  86     connect(this, SIGNAL(viewportEntered()),
  87             controller, SLOT(emitViewportEntered()));
  88     connect(controller, SIGNAL(zoomLevelChanged(int)),
  89             this, SLOT(setZoomLevel(int)));
  90
  91     const DolphinView* view = controller->dolphinView();
  92     connect(view, SIGNAL(showPreviewChanged()),
  93             this, SLOT(slotShowPreviewChanged()));
  94     connect(view, SIGNAL(additionalInfoChanged()),
  95             this, SLOT(slotAdditionalInfoChanged()));
  96
  97     // apply the icons mode settings to the widget
  98     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  99     Q_ASSERT(settings != 0);
 100
 101     if (settings->useSystemFont()) {
 102         m_font = KGlobalSettings::generalFont();
 103     } else {
 104         m_font = QFont(settings->fontFamily(),
 105                        settings->fontSize(),
 106                        settings->fontWeight(),
 107                        settings->italicFont());
 108     }
 109
 110     setWordWrap(settings->numberOfTextlines() > 1);
 111     updateGridSize(view->showPreview(), 0);
 112
 113     if (settings->arrangement() == QListView::TopToBottom) {
 114         setFlow(QListView::LeftToRight);
 115         m_decorationPosition = QStyleOptionViewItem::Top;
 116         m_displayAlignment = Qt::AlignHCenter;
 117     } else {
 118         setFlow(QListView::TopToBottom);
 119         m_decorationPosition = QStyleOptionViewItem::Left;
 120         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 121     }
 122
 123     m_categoryDrawer = new DolphinCategoryDrawer();
 124     setCategoryDrawer(m_categoryDrawer);
 125
 126     setFocus();
 127
 128     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 129             this, SLOT(slotGlobalSettingsChanged(int)));
 130 }
 131
 132 DolphinIconsView::~DolphinIconsView()
 133 {
 134     delete m_categoryDrawer;
 135     m_categoryDrawer = 0;
 136 }
 137
 138 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 139 {
 140     KCategorizedView::dataChanged(topLeft, bottomRight);
 141
 142     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 143     if (!proxyModel->isCategorizedModel()) {
 144         // bypass a QListView issue that items are not layout correctly if the decoration size of
 145         // an index changes
 146         scheduleDelayedItemsLayout();
 147     }
 148 }
 149
 150 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 151 {
 152     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 153     viewOptions.font = m_font;
 154     viewOptions.decorationPosition = m_decorationPosition;
 155     viewOptions.decorationSize = m_decorationSize;
 156     viewOptions.displayAlignment = m_displayAlignment;
 157     viewOptions.showDecorationSelected = true;
 158     return viewOptions;
 159 }
 160
 161 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 162 {
 163     KCategorizedView::contextMenuEvent(event);
 164     m_controller->triggerContextMenuRequest(event->pos());
 165 }
 166
 167 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 168 {
 169     m_controller->requestActivation();
 170     const QModelIndex index = indexAt(event->pos());
 171     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 172         // TODO: It should not be necessary to manually set the dragging state, but I could
 173         // not reproduce this issue with a Qt-only example yet to find the root cause.
 174         // Issue description: start Dolphin, split the view and drag an item from the
 175         // inactive view to the active view by a very fast mouse movement. Result:
 176         // the item gets selected instead of being dragged...
 177         setState(QAbstractItemView::DraggingState);
 178     }
 179
 180     if (!index.isValid()) {
 181         if (QApplication::mouseButtons() & Qt::MidButton) {
 182             m_controller->replaceUrlByClipboard();
 183         }
 184         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 185         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 186             clearSelection();
 187         }
 188     }
 189
 190     KCategorizedView::mousePressEvent(event);
 191 }
 192
 193 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 194 {
 195     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 196 }
 197
 198 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 199 {
 200     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 201         event->acceptProposedAction();
 202     }
 203 }
 204
 205 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 206 {
 207     setDirtyRegion(m_dropRect);
 208 }
 209
 210 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 211 {
 212     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 213     const QModelIndex index = indexAt(event->pos());
 214     setDirtyRegion(m_dropRect);
 215
 216     m_dropRect.setSize(QSize()); // set as invalid
 217     if (index.isValid()) {
 218         const KFileItem item = m_controller->itemForIndex(index);
 219         if (!item.isNull() && item.isDir()) {
 220             m_dropRect = visualRect(index);
 221         } else {
 222             m_dropRect.setSize(QSize()); // set as invalid
 223         }
 224     }
 225     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 226         // accept url drops, independently from the destination item
 227         event->acceptProposedAction();
 228     }
 229
 230     setDirtyRegion(m_dropRect);
 231 }
 232
 233 void DolphinIconsView::dropEvent(QDropEvent* event)
 234 {
 235     const QModelIndex index = indexAt(event->pos());
 236     const KFileItem item = m_controller->itemForIndex(index);
 237     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 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     if (m_selectionManager != 0) {
 322         m_selectionManager->reset();
 323     }
 324
 325     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 326     if (event->modifiers() & Qt::ControlModifier) {
 327         event->ignore();
 328         return;
 329     }
 330
 331     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 332     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 333
 334     KCategorizedView::wheelEvent(event);
 335     // if the icons are aligned left to right, the vertical wheel event should
 336     // be applied to the horizontal scrollbar
 337     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 338     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 339                                   (settings->arrangement() == QListView::LeftToRight);
 340     if (scrollHorizontal) {
 341         QWheelEvent horizEvent(event->pos(),
 342                                event->delta(),
 343                                event->buttons(),
 344                                event->modifiers(),
 345                                Qt::Horizontal);
 346         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 347     }
 348 }
 349
 350 void DolphinIconsView::showEvent(QShowEvent* event)
 351 {
 352     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 353     delegate->setMaximumSize(m_itemSize);
 354
 355     KCategorizedView::showEvent(event);
 356 }
 357
 358 void DolphinIconsView::leaveEvent(QEvent* event)
 359 {
 360     KCategorizedView::leaveEvent(event);
 361     // if the mouse is above an item and moved very fast outside the widget,
 362     // no viewportEntered() signal might be emitted although the mouse has been moved
 363     // above the viewport
 364     m_controller->emitViewportEntered();
 365 }
 366
 367 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 368 {
 369     KCategorizedView::currentChanged(current, previous);
 370     m_autoScroller->handleCurrentIndexChange(current, previous);
 371 }
 372
 373 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 374 {
 375     KCategorizedView::resizeEvent(event);
 376     const DolphinView* view = m_controller->dolphinView();
 377     updateGridSize(view->showPreview(), view->additionalInfo().count());
 378 }
 379
 380 void DolphinIconsView::slotShowPreviewChanged()
 381 {
 382     const DolphinView* view = m_controller->dolphinView();
 383     updateGridSize(view->showPreview(), additionalInfoCount());
 384 }
 385
 386 void DolphinIconsView::slotAdditionalInfoChanged()
 387 {
 388     const DolphinView* view = m_controller->dolphinView();
 389     const bool showPreview = view->showPreview();
 390     updateGridSize(showPreview, view->additionalInfo().count());
 391 }
 392
 393 void DolphinIconsView::setZoomLevel(int level)
 394 {
 395     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 396
 397     const int oldIconSize = settings->iconSize();
 398     int newIconSize = oldIconSize;
 399
 400     const bool showPreview = m_controller->dolphinView()->showPreview();
 401     if (showPreview) {
 402         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 403         settings->setPreviewSize(previewSize);
 404     } else {
 405         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 406         settings->setIconSize(newIconSize);
 407     }
 408
 409     // increase also the grid size
 410     const int diff = newIconSize - oldIconSize;
 411     settings->setItemWidth(settings->itemWidth() + diff);
 412     settings->setItemHeight(settings->itemHeight() + diff);
 413
 414     updateGridSize(showPreview, additionalInfoCount());
 415 }
 416
 417 void DolphinIconsView::requestActivation()
 418 {
 419     m_controller->requestActivation();
 420 }
 421
 422 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 423 {
 424     Q_UNUSED(category);
 425
 426     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 427     Q_ASSERT(settings != 0);
 428     if (settings->useSystemFont()) {
 429         m_font = KGlobalSettings::generalFont();
 430     }
 431
 432     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 433     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 434     if (KGlobalSettings::singleClick()) {
 435         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 436     } else {
 437         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 438     }
 439 }
 440
 441 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 442 {
 443     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 444     Q_ASSERT(settings != 0);
 445
 446     int itemWidth = settings->itemWidth();
 447     int itemHeight = settings->itemHeight();
 448     int size = settings->iconSize();
 449
 450     if (showPreview) {
 451         const int previewSize = settings->previewSize();
 452         const int diff = previewSize - size;
 453         itemWidth  += diff;
 454         itemHeight += diff;
 455
 456         size = previewSize;
 457     }
 458
 459     Q_ASSERT(additionalInfoCount >= 0);
 460     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 461
 462     // Optimize the item size of the grid in a way to prevent large gaps on the
 463     // right border (= row arrangement) or the bottom border (= column arrangement).
 464     // There is no public API in QListView to find out the used width of the viewport
 465     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 466     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 467     int frameAroundContents = 0;
 468     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 469         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 470     }
 471     const int spacing = settings->gridSpacing();
 472     if (settings->arrangement() == QListView::TopToBottom) {
 473         const int contentWidth = viewport()->width() - 1
 474                                  - frameAroundContents
 475                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 476         const int gridWidth = itemWidth + spacing * 2;
 477         const int horizItemCount = contentWidth / gridWidth;
 478         if (horizItemCount > 0) {
 479             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 480         }
 481
 482         // The decoration width indirectly defines the maximum
 483         // width for the text wrapping. To use the maximum item width
 484         // for text wrapping, it is used as decoration width.
 485         m_decorationSize = QSize(itemWidth, size);
 486         setIconSize(QSize(itemWidth, size));
 487     } else {
 488         const int contentHeight = viewport()->height() - 1
 489                                   - frameAroundContents
 490                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 491         const int gridHeight = itemHeight + spacing;
 492         const int vertItemCount = contentHeight / gridHeight;
 493         if (vertItemCount > 0) {
 494             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 495         }
 496
 497         m_decorationSize = QSize(size, size);
 498         setIconSize(QSize(size, size));
 499     }
 500
 501     m_itemSize = QSize(itemWidth, itemHeight);
 502     setGridSizeOwn(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 503
 504     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 505     if (delegate != 0) {
 506         delegate->setMaximumSize(m_itemSize);
 507     }
 508
 509     if (m_selectionManager != 0) {
 510         m_selectionManager->reset();
 511     }
 512 }
 513
 514 int DolphinIconsView::additionalInfoCount() const
 515 {
 516     const DolphinView* view = m_controller->dolphinView();
 517     return view->additionalInfo().count();
 518 }
 519
 520 #include "dolphiniconsview.moc"