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     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 196     // fix this in KDE 4.1
 197     KCategorizedView::startDrag(supportedActions);
 198     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 199 }
 200
 201 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 202 {
 203     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 204         event->acceptProposedAction();
 205     }
 206 }
 207
 208 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 209 {
 210     KCategorizedView::dragLeaveEvent(event);
 211     setDirtyRegion(m_dropRect);
 212 }
 213
 214 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 215 {
 216     KCategorizedView::dragMoveEvent(event);
 217
 218     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 219     const QModelIndex index = indexAt(event->pos());
 220     setDirtyRegion(m_dropRect);
 221
 222     m_dropRect.setSize(QSize()); // set as invalid
 223     if (index.isValid()) {
 224         const KFileItem item = m_controller->itemForIndex(index);
 225         if (!item.isNull() && item.isDir()) {
 226             m_dropRect = visualRect(index);
 227         } else {
 228             m_dropRect.setSize(QSize()); // set as invalid
 229         }
 230     }
 231     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 232         // accept url drops, independently from the destination item
 233         event->acceptProposedAction();
 234     }
 235
 236     setDirtyRegion(m_dropRect);
 237 }
 238
 239 void DolphinIconsView::dropEvent(QDropEvent* event)
 240 {
 241     const QModelIndex index = indexAt(event->pos());
 242     const KFileItem item = m_controller->itemForIndex(index);
 243     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 244
 245     KCategorizedView::dropEvent(event);
 246 }
 247
 248 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 249 {
 250     const QModelIndex oldCurrent = currentIndex();
 251
 252     QModelIndex newCurrent = QListView::moveCursor(cursorAction, modifiers);
 253     if (newCurrent != oldCurrent) {
 254         return newCurrent;
 255     }
 256
 257     // The cursor has not been moved by the base implementation. Provide a
 258     // wrap behavior, so that the cursor will go to the next item when reaching
 259     // the border.
 260     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 261     if (settings->arrangement() == QListView::LeftToRight) {
 262         switch (cursorAction) {
 263         case MoveUp:
 264             if (newCurrent.row() == 0) {
 265                 return newCurrent;
 266             }
 267             newCurrent = QListView::moveCursor(MoveLeft, modifiers);
 268             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 269             newCurrent = QListView::moveCursor(MovePageDown, modifiers);
 270             break;
 271
 272         case MoveDown:
 273             if (newCurrent.row() == (model()->rowCount() - 1)) {
 274                 return newCurrent;
 275             }
 276             newCurrent = QListView::moveCursor(MovePageUp, modifiers);
 277             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 278             newCurrent = QListView::moveCursor(MoveRight, modifiers);
 279             break;
 280
 281         default:
 282             break;
 283         }
 284     } else {
 285         QModelIndex current = oldCurrent;
 286         switch (cursorAction) {
 287         case MoveLeft:
 288             if (newCurrent.row() == 0) {
 289                 return newCurrent;
 290             }
 291             newCurrent = QListView::moveCursor(MoveUp, modifiers);
 292             do {
 293                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 294                 current = newCurrent;
 295                 newCurrent = QListView::moveCursor(MoveRight, modifiers);
 296             } while (newCurrent != current);
 297             break;
 298
 299         case MoveRight:
 300             if (newCurrent.row() == (model()->rowCount() - 1)) {
 301                 return newCurrent;
 302             }
 303             do {
 304                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 305                 current = newCurrent;
 306                 newCurrent = QListView::moveCursor(MoveLeft, modifiers);
 307             } while (newCurrent != current);
 308             newCurrent = QListView::moveCursor(MoveDown, modifiers);
 309             break;
 310
 311         default:
 312             break;
 313         }
 314     }
 315
 316     // Revert all changes of the current item to make sure that item selection works correctly
 317     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 318     return newCurrent;
 319 }
 320
 321 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 322 {
 323     KCategorizedView::keyPressEvent(event);
 324     m_controller->handleKeyPressEvent(event);
 325 }
 326
 327 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 328 {
 329     if (m_selectionManager != 0) {
 330         m_selectionManager->reset();
 331     }
 332
 333     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 334     if (event->modifiers() & Qt::ControlModifier) {
 335         event->ignore();
 336         return;
 337     }
 338
 339     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 340     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 341
 342     KCategorizedView::wheelEvent(event);
 343     // if the icons are aligned left to right, the vertical wheel event should
 344     // be applied to the horizontal scrollbar
 345     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 346     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 347                                   (settings->arrangement() == QListView::LeftToRight);
 348     if (scrollHorizontal) {
 349         QWheelEvent horizEvent(event->pos(),
 350                                event->delta(),
 351                                event->buttons(),
 352                                event->modifiers(),
 353                                Qt::Horizontal);
 354         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 355     }
 356 }
 357
 358 void DolphinIconsView::showEvent(QShowEvent* event)
 359 {
 360     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 361     delegate->setMaximumSize(m_itemSize);
 362
 363     KCategorizedView::showEvent(event);
 364 }
 365
 366 void DolphinIconsView::leaveEvent(QEvent* event)
 367 {
 368     KCategorizedView::leaveEvent(event);
 369     // if the mouse is above an item and moved very fast outside the widget,
 370     // no viewportEntered() signal might be emitted although the mouse has been moved
 371     // above the viewport
 372     m_controller->emitViewportEntered();
 373 }
 374
 375 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 376 {
 377     KCategorizedView::currentChanged(current, previous);
 378     m_autoScroller->handleCurrentIndexChange(current, previous);
 379 }
 380
 381 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 382 {
 383     KCategorizedView::resizeEvent(event);
 384     const DolphinView* view = m_controller->dolphinView();
 385     updateGridSize(view->showPreview(), view->additionalInfo().count());
 386 }
 387
 388 void DolphinIconsView::slotShowPreviewChanged()
 389 {
 390     const DolphinView* view = m_controller->dolphinView();
 391     updateGridSize(view->showPreview(), additionalInfoCount());
 392 }
 393
 394 void DolphinIconsView::slotAdditionalInfoChanged()
 395 {
 396     const DolphinView* view = m_controller->dolphinView();
 397     const bool showPreview = view->showPreview();
 398     updateGridSize(showPreview, view->additionalInfo().count());
 399 }
 400
 401 void DolphinIconsView::setZoomLevel(int level)
 402 {
 403     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 404
 405     const int oldIconSize = settings->iconSize();
 406     int newIconSize = oldIconSize;
 407
 408     const bool showPreview = m_controller->dolphinView()->showPreview();
 409     if (showPreview) {
 410         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 411         settings->setPreviewSize(previewSize);
 412     } else {
 413         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 414         settings->setIconSize(newIconSize);
 415     }
 416
 417     // increase also the grid size
 418     const int diff = newIconSize - oldIconSize;
 419     settings->setItemWidth(settings->itemWidth() + diff);
 420     settings->setItemHeight(settings->itemHeight() + diff);
 421
 422     updateGridSize(showPreview, additionalInfoCount());
 423 }
 424
 425 void DolphinIconsView::requestActivation()
 426 {
 427     m_controller->requestActivation();
 428 }
 429
 430 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 431 {
 432     Q_UNUSED(category);
 433
 434     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 435     Q_ASSERT(settings != 0);
 436     if (settings->useSystemFont()) {
 437         m_font = KGlobalSettings::generalFont();
 438     }
 439
 440     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 441     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 442     if (KGlobalSettings::singleClick()) {
 443         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 444     } else {
 445         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 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 * m_font.pointSize() * 2;
 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     setGridSize(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     if (m_selectionManager != 0) {
 518         m_selectionManager->reset();
 519     }
 520 }
 521
 522 int DolphinIconsView::additionalInfoCount() const
 523 {
 524     const DolphinView* view = m_controller->dolphinView();
 525     return view->additionalInfo().count();
 526 }
 527
 528 #include "dolphiniconsview.moc"