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 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 249 {
 250     KCategorizedView::keyPressEvent(event);
 251     m_controller->handleKeyPressEvent(event);
 252 }
 253
 254 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 255 {
 256     if (m_selectionManager != 0) {
 257         m_selectionManager->reset();
 258     }
 259
 260     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 261     if (event->modifiers() & Qt::ControlModifier) {
 262         event->ignore();
 263         return;
 264     }
 265
 266     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 267     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 268
 269     KCategorizedView::wheelEvent(event);
 270     // if the icons are aligned left to right, the vertical wheel event should
 271     // be applied to the horizontal scrollbar
 272     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 273     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 274                                   (settings->arrangement() == QListView::LeftToRight);
 275     if (scrollHorizontal) {
 276         QWheelEvent horizEvent(event->pos(),
 277                                event->delta(),
 278                                event->buttons(),
 279                                event->modifiers(),
 280                                Qt::Horizontal);
 281         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 282     }
 283 }
 284
 285 void DolphinIconsView::showEvent(QShowEvent* event)
 286 {
 287     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 288     delegate->setMaximumSize(m_itemSize);
 289
 290     KCategorizedView::showEvent(event);
 291 }
 292
 293 void DolphinIconsView::leaveEvent(QEvent* event)
 294 {
 295     KCategorizedView::leaveEvent(event);
 296     // if the mouse is above an item and moved very fast outside the widget,
 297     // no viewportEntered() signal might be emitted although the mouse has been moved
 298     // above the viewport
 299     m_controller->emitViewportEntered();
 300 }
 301
 302 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 303 {
 304     KCategorizedView::currentChanged(current, previous);
 305     m_autoScroller->handleCurrentIndexChange(current, previous);
 306 }
 307
 308 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 309 {
 310     KCategorizedView::resizeEvent(event);
 311     const DolphinView* view = m_controller->dolphinView();
 312     updateGridSize(view->showPreview(), view->additionalInfo().count());
 313 }
 314
 315 void DolphinIconsView::slotShowPreviewChanged()
 316 {
 317     const DolphinView* view = m_controller->dolphinView();
 318     updateGridSize(view->showPreview(), additionalInfoCount());
 319 }
 320
 321 void DolphinIconsView::slotAdditionalInfoChanged()
 322 {
 323     const DolphinView* view = m_controller->dolphinView();
 324     const bool showPreview = view->showPreview();
 325     updateGridSize(showPreview, view->additionalInfo().count());
 326 }
 327
 328 void DolphinIconsView::setZoomLevel(int level)
 329 {
 330     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 331
 332     const int oldIconSize = settings->iconSize();
 333     int newIconSize = oldIconSize;
 334
 335     const bool showPreview = m_controller->dolphinView()->showPreview();
 336     if (showPreview) {
 337         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 338         settings->setPreviewSize(previewSize);
 339     } else {
 340         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 341         settings->setIconSize(newIconSize);
 342     }
 343
 344     // increase also the grid size
 345     const int diff = newIconSize - oldIconSize;
 346     settings->setItemWidth(settings->itemWidth() + diff);
 347     settings->setItemHeight(settings->itemHeight() + diff);
 348
 349     updateGridSize(showPreview, additionalInfoCount());
 350 }
 351
 352 void DolphinIconsView::requestActivation()
 353 {
 354     m_controller->requestActivation();
 355 }
 356
 357 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 358 {
 359     Q_UNUSED(category);
 360
 361     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 362     Q_ASSERT(settings != 0);
 363     if (settings->useSystemFont()) {
 364         m_font = KGlobalSettings::generalFont();
 365     }
 366
 367     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 368     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 369     if (KGlobalSettings::singleClick()) {
 370         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 371     } else {
 372         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 373     }
 374 }
 375
 376 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 377 {
 378     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 379     Q_ASSERT(settings != 0);
 380
 381     int itemWidth = settings->itemWidth();
 382     int itemHeight = settings->itemHeight();
 383     int size = settings->iconSize();
 384
 385     if (showPreview) {
 386         const int previewSize = settings->previewSize();
 387         const int diff = previewSize - size;
 388         itemWidth  += diff;
 389         itemHeight += diff;
 390
 391         size = previewSize;
 392     }
 393
 394     Q_ASSERT(additionalInfoCount >= 0);
 395     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 396
 397     // Optimize the item size of the grid in a way to prevent large gaps on the
 398     // right border (= row arrangement) or the bottom border (= column arrangement).
 399     // There is no public API in QListView to find out the used width of the viewport
 400     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 401     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 402     int frameAroundContents = 0;
 403     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 404         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 405     }
 406     const int spacing = settings->gridSpacing();
 407     if (settings->arrangement() == QListView::TopToBottom) {
 408         const int contentWidth = viewport()->width() - 1
 409                                  - frameAroundContents
 410                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 411         const int gridWidth = itemWidth + spacing * 2;
 412         const int horizItemCount = contentWidth / gridWidth;
 413         if (horizItemCount > 0) {
 414             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 415         }
 416
 417         // The decoration width indirectly defines the maximum
 418         // width for the text wrapping. To use the maximum item width
 419         // for text wrapping, it is used as decoration width.
 420         m_decorationSize = QSize(itemWidth, size);
 421         setIconSize(QSize(itemWidth, size));
 422     } else {
 423         const int contentHeight = viewport()->height() - 1
 424                                   - frameAroundContents
 425                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 426         const int gridHeight = itemHeight + spacing;
 427         const int vertItemCount = contentHeight / gridHeight;
 428         if (vertItemCount > 0) {
 429             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 430         }
 431
 432         m_decorationSize = QSize(size, size);
 433         setIconSize(QSize(size, size));
 434     }
 435
 436     m_itemSize = QSize(itemWidth, itemHeight);
 437     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 438
 439     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 440     if (delegate != 0) {
 441         delegate->setMaximumSize(m_itemSize);
 442     }
 443
 444     if (m_selectionManager != 0) {
 445         m_selectionManager->reset();
 446     }
 447 }
 448
 449 int DolphinIconsView::additionalInfoCount() const
 450 {
 451     const DolphinView* view = m_controller->dolphinView();
 452     return view->additionalInfo().count();
 453 }
 454
 455 #include "dolphiniconsview.moc"