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_enableScrollTo(false),
  44     m_controller(controller),
  45     m_selectionManager(0),
  46     m_autoScroller(0),
  47     m_categoryDrawer(0),
  48     m_font(),
  49     m_decorationSize(),
  50     m_decorationPosition(QStyleOptionViewItem::Top),
  51     m_displayAlignment(Qt::AlignHCenter),
  52     m_itemSize(),
  53     m_dropRect()
  54 {
  55     Q_ASSERT(controller != 0);
  56     setLayoutDirection(Qt::LeftToRight);
  57     setViewMode(QListView::IconMode);
  58     setResizeMode(QListView::Adjust);
  59     setMovement(QListView::Static);
  60     setDragEnabled(true);
  61     setEditTriggers(QAbstractItemView::NoEditTriggers);
  62     viewport()->setAcceptDrops(true);
  63
  64     setMouseTracking(true);
  65     m_autoScroller = new DolphinViewAutoScroller(this);
  66
  67     connect(this, SIGNAL(clicked(const QModelIndex&)),
  68             controller, SLOT(requestTab(const QModelIndex&)));
  69     if (KGlobalSettings::singleClick()) {
  70         connect(this, SIGNAL(clicked(const QModelIndex&)),
  71                 controller, SLOT(triggerItem(const QModelIndex&)));
  72     } else {
  73         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  74                 controller, SLOT(triggerItem(const QModelIndex&)));
  75     }
  76
  77     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  78         m_selectionManager = new SelectionManager(this);
  79         connect(m_selectionManager, SIGNAL(selectionChanged()),
  80                 this, SLOT(requestActivation()));
  81         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  82                 m_selectionManager, SLOT(reset()));
  83     }
  84
  85     connect(this, SIGNAL(entered(const QModelIndex&)),
  86             controller, SLOT(emitItemEntered(const QModelIndex&)));
  87     connect(this, SIGNAL(viewportEntered()),
  88             controller, SLOT(emitViewportEntered()));
  89     connect(controller, SIGNAL(zoomLevelChanged(int)),
  90             this, SLOT(setZoomLevel(int)));
  91     connect(controller, SIGNAL(scrollToCurrentItem()),
  92             this, SLOT(scrollToCurrentItem()));
  93
  94     const DolphinView* view = controller->dolphinView();
  95     connect(view, SIGNAL(showPreviewChanged()),
  96             this, SLOT(slotShowPreviewChanged()));
  97     connect(view, SIGNAL(additionalInfoChanged()),
  98             this, SLOT(slotAdditionalInfoChanged()));
  99
 100     // apply the icons mode settings to the widget
 101     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 102     Q_ASSERT(settings != 0);
 103
 104     if (settings->useSystemFont()) {
 105         m_font = KGlobalSettings::generalFont();
 106     } else {
 107         m_font = QFont(settings->fontFamily(),
 108                        settings->fontSize(),
 109                        settings->fontWeight(),
 110                        settings->italicFont());
 111     }
 112
 113     setWordWrap(settings->numberOfTextlines() > 1);
 114     updateGridSize(view->showPreview(), 0);
 115
 116     if (settings->arrangement() == QListView::TopToBottom) {
 117         setFlow(QListView::LeftToRight);
 118         m_decorationPosition = QStyleOptionViewItem::Top;
 119         m_displayAlignment = Qt::AlignHCenter;
 120     } else {
 121         setFlow(QListView::TopToBottom);
 122         m_decorationPosition = QStyleOptionViewItem::Left;
 123         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 124     }
 125
 126     m_categoryDrawer = new DolphinCategoryDrawer();
 127     setCategoryDrawer(m_categoryDrawer);
 128
 129     setFocus();
 130
 131     connect(KGlobalSettings::self(), SIGNAL(settingsChanged(int)),
 132             this, SLOT(slotGlobalSettingsChanged(int)));
 133 }
 134
 135 DolphinIconsView::~DolphinIconsView()
 136 {
 137     delete m_categoryDrawer;
 138     m_categoryDrawer = 0;
 139 }
 140
 141 void DolphinIconsView::scrollTo(const QModelIndex& index, ScrollHint hint)
 142 {
 143     // Enable the QListView implementation of scrollTo() only if it has been
 144     // triggered by a key press. Otherwise QAbstractItemView wants to scroll to the current
 145     // index each time the layout has been changed. This becomes an issue when
 146     // previews are loaded and the scrollbar is used: the scrollbar will always
 147     // be reset to 0 on each new preview.
 148     if (m_enableScrollTo || (state() != QAbstractItemView::NoState)) {
 149         KCategorizedView::scrollTo(index, hint);
 150         m_enableScrollTo = false;
 151     }
 152 }
 153
 154 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 155 {
 156     KCategorizedView::dataChanged(topLeft, bottomRight);
 157
 158     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 159     if (!proxyModel->isCategorizedModel()) {
 160         // bypass a QListView issue that items are not layout correctly if the decoration size of
 161         // an index changes
 162         scheduleDelayedItemsLayout();
 163     }
 164 }
 165
 166 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 167 {
 168     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 169     viewOptions.font = m_font;
 170     viewOptions.decorationPosition = m_decorationPosition;
 171     viewOptions.decorationSize = m_decorationSize;
 172     viewOptions.displayAlignment = m_displayAlignment;
 173     viewOptions.showDecorationSelected = true;
 174     return viewOptions;
 175 }
 176
 177 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 178 {
 179     KCategorizedView::contextMenuEvent(event);
 180     m_controller->triggerContextMenuRequest(event->pos());
 181 }
 182
 183 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 184 {
 185     m_controller->requestActivation();
 186     const QModelIndex index = indexAt(event->pos());
 187     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 188         // TODO: It should not be necessary to manually set the dragging state, but I could
 189         // not reproduce this issue with a Qt-only example yet to find the root cause.
 190         // Issue description: start Dolphin, split the view and drag an item from the
 191         // inactive view to the active view by a very fast mouse movement. Result:
 192         // the item gets selected instead of being dragged...
 193         setState(QAbstractItemView::DraggingState);
 194     }
 195
 196     if (!index.isValid()) {
 197         if (QApplication::mouseButtons() & Qt::MidButton) {
 198             m_controller->replaceUrlByClipboard();
 199         }
 200         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 201         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 202             clearSelection();
 203         }
 204     }
 205
 206     KCategorizedView::mousePressEvent(event);
 207 }
 208
 209 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 210 {
 211     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 212     // fix this in KDE 4.1
 213     KCategorizedView::startDrag(supportedActions);
 214     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 215 }
 216
 217 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 218 {
 219     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 220         event->acceptProposedAction();
 221     }
 222 }
 223
 224 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 225 {
 226     KCategorizedView::dragLeaveEvent(event);
 227     setDirtyRegion(m_dropRect);
 228 }
 229
 230 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 231 {
 232     KCategorizedView::dragMoveEvent(event);
 233
 234     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 235     const QModelIndex index = indexAt(event->pos());
 236     setDirtyRegion(m_dropRect);
 237
 238     m_dropRect.setSize(QSize()); // set as invalid
 239     if (index.isValid()) {
 240         const KFileItem item = m_controller->itemForIndex(index);
 241         if (!item.isNull() && item.isDir()) {
 242             m_dropRect = visualRect(index);
 243         } else {
 244             m_dropRect.setSize(QSize()); // set as invalid
 245         }
 246     }
 247     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 248         // accept url drops, independently from the destination item
 249         event->acceptProposedAction();
 250     }
 251
 252     setDirtyRegion(m_dropRect);
 253 }
 254
 255 void DolphinIconsView::dropEvent(QDropEvent* event)
 256 {
 257     const QModelIndex index = indexAt(event->pos());
 258     const KFileItem item = m_controller->itemForIndex(index);
 259     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 260
 261     KCategorizedView::dropEvent(event);
 262 }
 263
 264 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 265 {
 266     m_enableScrollTo = true; // see DolphinIconsView::scrollTo()
 267     KCategorizedView::keyPressEvent(event);
 268     m_controller->handleKeyPressEvent(event);
 269 }
 270
 271 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 272 {
 273     if (m_selectionManager != 0) {
 274         m_selectionManager->reset();
 275     }
 276
 277     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 278     if (event->modifiers() & Qt::ControlModifier) {
 279         event->ignore();
 280         return;
 281     }
 282
 283     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 284     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 285
 286     KCategorizedView::wheelEvent(event);
 287     // if the icons are aligned left to right, the vertical wheel event should
 288     // be applied to the horizontal scrollbar
 289     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 290     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 291                                   (settings->arrangement() == QListView::LeftToRight);
 292     if (scrollHorizontal) {
 293         QWheelEvent horizEvent(event->pos(),
 294                                event->delta(),
 295                                event->buttons(),
 296                                event->modifiers(),
 297                                Qt::Horizontal);
 298         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 299     }
 300 }
 301
 302 void DolphinIconsView::showEvent(QShowEvent* event)
 303 {
 304     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 305     delegate->setMaximumSize(m_itemSize);
 306
 307     KCategorizedView::showEvent(event);
 308 }
 309
 310 void DolphinIconsView::leaveEvent(QEvent* event)
 311 {
 312     KCategorizedView::leaveEvent(event);
 313     // if the mouse is above an item and moved very fast outside the widget,
 314     // no viewportEntered() signal might be emitted although the mouse has been moved
 315     // above the viewport
 316     m_controller->emitViewportEntered();
 317 }
 318
 319 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 320 {
 321     KCategorizedView::currentChanged(current, previous);
 322     if (current.isValid() && !m_autoScroller->isActive()) {
 323         scrollTo(current);
 324     }
 325 }
 326
 327 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 328 {
 329     KCategorizedView::resizeEvent(event);
 330     const DolphinView* view = m_controller->dolphinView();
 331     updateGridSize(view->showPreview(), view->additionalInfo().count());
 332 }
 333
 334 void DolphinIconsView::slotShowPreviewChanged()
 335 {
 336     const DolphinView* view = m_controller->dolphinView();
 337     updateGridSize(view->showPreview(), additionalInfoCount());
 338 }
 339
 340 void DolphinIconsView::slotAdditionalInfoChanged()
 341 {
 342     const DolphinView* view = m_controller->dolphinView();
 343     const bool showPreview = view->showPreview();
 344     updateGridSize(showPreview, view->additionalInfo().count());
 345 }
 346
 347 void DolphinIconsView::setZoomLevel(int level)
 348 {
 349     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 350
 351     const int oldIconSize = settings->iconSize();
 352     int newIconSize = oldIconSize;
 353
 354     const bool showPreview = m_controller->dolphinView()->showPreview();
 355     if (showPreview) {
 356         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 357         settings->setPreviewSize(previewSize);
 358     } else {
 359         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 360         settings->setIconSize(newIconSize);
 361     }
 362
 363     // increase also the grid size
 364     const int diff = newIconSize - oldIconSize;
 365     settings->setItemWidth(settings->itemWidth() + diff);
 366     settings->setItemHeight(settings->itemHeight() + diff);
 367
 368     updateGridSize(showPreview, additionalInfoCount());
 369 }
 370
 371 void DolphinIconsView::requestActivation()
 372 {
 373     m_controller->requestActivation();
 374 }
 375
 376 void DolphinIconsView::slotGlobalSettingsChanged(int category)
 377 {
 378     Q_UNUSED(category);
 379
 380     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 381     Q_ASSERT(settings != 0);
 382     if (settings->useSystemFont()) {
 383         m_font = KGlobalSettings::generalFont();
 384     }
 385
 386     disconnect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 387     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 388     if (KGlobalSettings::singleClick()) {
 389         connect(this, SIGNAL(clicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 390     } else {
 391         connect(this, SIGNAL(doubleClicked(QModelIndex)), m_controller, SLOT(triggerItem(QModelIndex)));
 392     }
 393 }
 394
 395 void DolphinIconsView::scrollToCurrentItem()
 396 {
 397     m_enableScrollTo = true;
 398     scrollTo(currentIndex());
 399     m_enableScrollTo = false;
 400 }
 401
 402 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 403 {
 404     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 405     Q_ASSERT(settings != 0);
 406
 407     int itemWidth = settings->itemWidth();
 408     int itemHeight = settings->itemHeight();
 409     int size = settings->iconSize();
 410
 411     if (showPreview) {
 412         const int previewSize = settings->previewSize();
 413         const int diff = previewSize - size;
 414         itemWidth  += diff;
 415         itemHeight += diff;
 416
 417         size = previewSize;
 418     }
 419
 420     Q_ASSERT(additionalInfoCount >= 0);
 421     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 422
 423     // Optimize the item size of the grid in a way to prevent large gaps on the
 424     // right border (= row arrangement) or the bottom border (= column arrangement).
 425     // There is no public API in QListView to find out the used width of the viewport
 426     // for the layout. The following calculation of 'contentWidth'/'contentHeight'
 427     // is based on QListViewPrivate::prepareItemsLayout() (Copyright (C) 2009 Nokia Corporation).
 428     int frameAroundContents = 0;
 429     if (style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) {
 430         frameAroundContents = style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
 431     }
 432     const int spacing = settings->gridSpacing();
 433     if (settings->arrangement() == QListView::TopToBottom) {
 434         const int contentWidth = viewport()->width() - 1
 435                                  - frameAroundContents
 436                                  - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 437         const int gridWidth = itemWidth + spacing * 2;
 438         const int horizItemCount = contentWidth / gridWidth;
 439         if (horizItemCount > 0) {
 440             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 441         }
 442
 443         // The decoration width indirectly defines the maximum
 444         // width for the text wrapping. To use the maximum item width
 445         // for text wrapping, it is used as decoration width.
 446         m_decorationSize = QSize(itemWidth, size);
 447         setIconSize(QSize(itemWidth, size));
 448     } else {
 449         const int contentHeight = viewport()->height() - 1
 450                                   - frameAroundContents
 451                                   - style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 452         const int gridHeight = itemHeight + spacing;
 453         const int vertItemCount = contentHeight / gridHeight;
 454         if (vertItemCount > 0) {
 455             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 456         }
 457
 458         m_decorationSize = QSize(size, size);
 459         setIconSize(QSize(size, size));
 460     }
 461
 462     m_itemSize = QSize(itemWidth, itemHeight);
 463     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 464
 465     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 466     if (delegate != 0) {
 467         delegate->setMaximumSize(m_itemSize);
 468     }
 469
 470     if (m_selectionManager != 0) {
 471         m_selectionManager->reset();
 472     }
 473 }
 474
 475 int DolphinIconsView::additionalInfoCount() const
 476 {
 477     const DolphinView* view = m_controller->dolphinView();
 478     return view->additionalInfo().count();
 479 }
 480
 481 #include "dolphiniconsview.moc"