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     Q_UNUSED(event);
 208     setDirtyRegion(m_dropRect);
 209 }
 210
 211 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 212 {
 213     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 214     const QModelIndex index = indexAt(event->pos());
 215     setDirtyRegion(m_dropRect);
 216
 217     m_dropRect.setSize(QSize()); // set as invalid
 218     if (index.isValid()) {
 219         const KFileItem item = m_controller->itemForIndex(index);
 220         if (!item.isNull() && item.isDir()) {
 221             m_dropRect = visualRect(index);
 222         } else {
 223             m_dropRect.setSize(QSize()); // set as invalid
 224         }
 225     }
 226     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 227         // accept url drops, independently from the destination item
 228         event->acceptProposedAction();
 229     }
 230
 231     setDirtyRegion(m_dropRect);
 232 }
 233
 234 void DolphinIconsView::dropEvent(QDropEvent* event)
 235 {
 236     const QModelIndex index = indexAt(event->pos());
 237     const KFileItem item = m_controller->itemForIndex(index);
 238     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 239 }
 240
 241 QModelIndex DolphinIconsView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
 242 {
 243     const QModelIndex oldCurrent = currentIndex();
 244
 245     QModelIndex newCurrent = KCategorizedView::moveCursor(cursorAction, modifiers);
 246     if (newCurrent != oldCurrent) {
 247         return newCurrent;
 248     }
 249
 250     // The cursor has not been moved by the base implementation. Provide a
 251     // wrap behavior, so that the cursor will go to the next item when reaching
 252     // the border.
 253     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 254     if (settings->arrangement() == QListView::LeftToRight) {
 255         switch (cursorAction) {
 256         case MoveUp:
 257             if (newCurrent.row() == 0) {
 258                 return newCurrent;
 259             }
 260             newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 261             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 262             newCurrent = KCategorizedView::moveCursor(MovePageDown, modifiers);
 263             break;
 264
 265         case MoveDown:
 266             if (newCurrent.row() == (model()->rowCount() - 1)) {
 267                 return newCurrent;
 268             }
 269             newCurrent = KCategorizedView::moveCursor(MovePageUp, modifiers);
 270             selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 271             newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 272             break;
 273
 274         default:
 275             break;
 276         }
 277     } else {
 278         QModelIndex current = oldCurrent;
 279         switch (cursorAction) {
 280         case MoveLeft:
 281             if (newCurrent.row() == 0) {
 282                 return newCurrent;
 283             }
 284             newCurrent = KCategorizedView::moveCursor(MoveUp, modifiers);
 285             do {
 286                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 287                 current = newCurrent;
 288                 newCurrent = KCategorizedView::moveCursor(MoveRight, modifiers);
 289             } while (newCurrent != current);
 290             break;
 291
 292         case MoveRight:
 293             if (newCurrent.row() == (model()->rowCount() - 1)) {
 294                 return newCurrent;
 295             }
 296             do {
 297                 selectionModel()->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
 298                 current = newCurrent;
 299                 newCurrent = KCategorizedView::moveCursor(MoveLeft, modifiers);
 300             } while (newCurrent != current);
 301             newCurrent = KCategorizedView::moveCursor(MoveDown, modifiers);
 302             break;
 303
 304         default:
 305             break;
 306         }
 307     }
 308
 309     // Revert all changes of the current item to make sure that item selection works correctly
 310     selectionModel()->setCurrentIndex(oldCurrent, QItemSelectionModel::NoUpdate);
 311     return newCurrent;
 312 }
 313
 314 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 315 {
 316     KCategorizedView::keyPressEvent(event);
 317     m_controller->handleKeyPressEvent(event);
 318 }
 319
 320 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 321 {
 322     if (m_selectionManager != 0) {
 323         m_selectionManager->reset();
 324     }
 325
 326     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 327     if (event->modifiers() & Qt::ControlModifier) {
 328         event->ignore();
 329         return;
 330     }
 331
 332     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 333     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 334
 335     KCategorizedView::wheelEvent(event);
 336     // if the icons are aligned left to right, the vertical wheel event should
 337     // be applied to the horizontal scrollbar
 338     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 339     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 340                                   (settings->arrangement() == QListView::LeftToRight);
 341     if (scrollHorizontal) {
 342         QWheelEvent horizEvent(event->pos(),
 343                                event->delta(),
 344                                event->buttons(),
 345                                event->modifiers(),
 346                                Qt::Horizontal);
 347         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 348     }
 349 }
 350
 351 void DolphinIconsView::showEvent(QShowEvent* event)
 352 {
 353     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 354     delegate->setMaximumSize(m_itemSize);
 355
 356     KCategorizedView::showEvent(event);
 357 }
 358
 359 void DolphinIconsView::leaveEvent(QEvent* event)
 360 {
 361     KCategorizedView::leaveEvent(event);
 362     // if the mouse is above an item and moved very fast outside the widget,
 363     // no viewportEntered() signal might be emitted although the mouse has been moved
 364     // above the viewport
 365     m_controller->emitViewportEntered();
 366 }
 367
 368 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 369 {
 370     KCategorizedView::currentChanged(current, previous);
 371     m_autoScroller->handleCurrentIndexChange(current, previous);
 372 }
 373
 374 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 375 {
 376     KCategorizedView::resizeEvent(event);
 377     const DolphinView* view = m_controller->dolphinView();
 378     updateGridSize(view->showPreview(), view->additionalInfo().count());
 379 }
 380
 381 void DolphinIconsView::slotShowPreviewChanged()
 382 {
 383     const DolphinView* view = m_controller->dolphinView();
 384     updateGridSize(view->showPreview(), additionalInfoCount());
 385 }
 386
 387 void DolphinIconsView::slotAdditionalInfoChanged()
 388 {
 389     const DolphinView* view = m_controller->dolphinView();
 390     const bool showPreview = view->showPreview();
 391     updateGridSize(showPreview, view->additionalInfo().count());
 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     if (m_selectionManager != 0) {
 511         m_selectionManager->reset();
 512     }
 513 }
 514
 515 int DolphinIconsView::additionalInfoCount() const
 516 {
 517     const DolphinView* view = m_controller->dolphinView();
 518     return view->additionalInfo().count();
 519 }
 520
 521 #include "dolphiniconsview.moc"