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 "dolphinsettings.h"
  25 #include "dolphin_iconsmodesettings.h"
  26 #include "dolphin_generalsettings.h"
  27 #include "draganddrophelper.h"
  28 #include "selectionmanager.h"
  29
  30 #include <kcategorizedsortfilterproxymodel.h>
  31 #include <kdialog.h>
  32 #include <kdirmodel.h>
  33
  34 #include <QAbstractProxyModel>
  35 #include <QApplication>
  36 #include <QPainter>
  37 #include <QPoint>
  38 #include <QScrollBar>
  39
  40 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  41     KCategorizedView(parent),
  42     m_controller(controller),
  43     m_categoryDrawer(0),
  44     m_font(),
  45     m_decorationSize(),
  46     m_decorationPosition(QStyleOptionViewItem::Top),
  47     m_displayAlignment(Qt::AlignHCenter),
  48     m_itemSize(),
  49     m_dragging(false),
  50     m_dropRect()
  51 {
  52     Q_ASSERT(controller != 0);
  53     setViewMode(QListView::IconMode);
  54     setResizeMode(QListView::Adjust);
  55     setSpacing(KDialog::spacingHint());
  56     setMovement(QListView::Static);
  57     setDragEnabled(true);
  58     viewport()->setAcceptDrops(true);
  59
  60     setMouseTracking(true);
  61     viewport()->setAttribute(Qt::WA_Hover);
  62
  63     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  64     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  65     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  66     // RETURN-key in keyPressEvent().
  67     if (KGlobalSettings::singleClick()) {
  68         connect(this, SIGNAL(clicked(const QModelIndex&)),
  69                 this, SLOT(triggerItem(const QModelIndex&)));
  70         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  71             SelectionManager* selManager = new SelectionManager(this);
  72             connect(selManager, SIGNAL(selectionChanged()),
  73                     this, SLOT(requestActivation()));
  74             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  75                     selManager, SLOT(reset()));
  76         }
  77     } else {
  78         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  79                 this, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81     connect(this, SIGNAL(viewportEntered()),
  82             controller, SLOT(emitViewportEntered()));
  83     connect(controller, SIGNAL(zoomIn()),
  84             this, SLOT(zoomIn()));
  85     connect(controller, SIGNAL(zoomOut()),
  86             this, SLOT(zoomOut()));
  87
  88     const DolphinView* view = controller->dolphinView();
  89     connect(view, SIGNAL(showPreviewChanged()),
  90             this, SLOT(slotShowPreviewChanged()));
  91     connect(view, SIGNAL(additionalInfoChanged()),
  92             this, SLOT(slotAdditionalInfoChanged()));
  93
  94     connect(this, SIGNAL(entered(const QModelIndex&)),
  95             this, SLOT(slotEntered(const QModelIndex&)));
  96
  97     // apply the icons mode settings to the widget
  98     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  99     Q_ASSERT(settings != 0);
 100
 101     m_font = QFont(settings->fontFamily(), settings->fontSize());
 102     m_font.setItalic(settings->italicFont());
 103     m_font.setBold(settings->boldFont());
 104
 105     setWordWrap(settings->numberOfTextlines() > 1);
 106     updateGridSize(view->showPreview(), 0);
 107
 108     if (settings->arrangement() == QListView::TopToBottom) {
 109         setFlow(QListView::LeftToRight);
 110         m_decorationPosition = QStyleOptionViewItem::Top;
 111         m_displayAlignment = Qt::AlignHCenter;
 112     } else {
 113         setFlow(QListView::TopToBottom);
 114         m_decorationPosition = QStyleOptionViewItem::Left;
 115         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 116     }
 117
 118     m_categoryDrawer = new DolphinCategoryDrawer();
 119     setCategoryDrawer(m_categoryDrawer);
 120
 121     setFocus();
 122 }
 123
 124 DolphinIconsView::~DolphinIconsView()
 125 {
 126     delete m_categoryDrawer;
 127     m_categoryDrawer = 0;
 128 }
 129
 130 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 131 {
 132     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 133
 134     QRect itemRect = KCategorizedView::visualRect(index);
 135
 136     const int maxWidth  = m_itemSize.width();
 137     const int maxHeight = m_itemSize.height();
 138
 139     if (itemRect.width() > maxWidth) {
 140         // assure that the maximum item width is not exceeded
 141         if (leftToRightFlow) {
 142             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 143             itemRect.setLeft(left);
 144         }
 145         itemRect.setWidth(maxWidth);
 146     }
 147
 148     if (itemRect.height() > maxHeight) {
 149         // assure that the maximum item height is not exceeded
 150         if (!leftToRightFlow) {
 151             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 152             itemRect.setTop(top);
 153         }
 154         itemRect.setHeight(maxHeight);
 155     }
 156
 157     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 158     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 159         // TODO: QListView::visualRect() calculates a wrong position of the items under
 160         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 161         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 162         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 163         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 164         const int margin = settings->gridSpacing();
 165         const int gridWidth = gridSize().width();
 166         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 167         const int centerInc = (maxWidth - itemRect.width()) / 2;
 168         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 169     }
 170
 171     return itemRect;
 172 }
 173
 174 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 175 {
 176     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 177     viewOptions.font = m_font;
 178     viewOptions.decorationPosition = m_decorationPosition;
 179     viewOptions.decorationSize = m_decorationSize;
 180     viewOptions.displayAlignment = m_displayAlignment;
 181     viewOptions.showDecorationSelected = true;
 182     return viewOptions;
 183 }
 184
 185 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 186 {
 187     KCategorizedView::contextMenuEvent(event);
 188     m_controller->triggerContextMenuRequest(event->pos());
 189 }
 190
 191 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 192 {
 193     m_controller->requestActivation();
 194     if (!indexAt(event->pos()).isValid()) {
 195         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 196         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 197             clearSelection();
 198         }
 199     }
 200
 201     KCategorizedView::mousePressEvent(event);
 202 }
 203
 204 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 205 {
 206     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 207     // fix this in KDE 4.1
 208     KCategorizedView::startDrag(supportedActions);
 209     DragAndDropHelper::startDrag(this, supportedActions);
 210 }
 211
 212 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 213 {
 214     if (event->mimeData()->hasUrls()) {
 215         event->acceptProposedAction();
 216     }
 217     m_dragging = true;
 218 }
 219
 220 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 221 {
 222     KCategorizedView::dragLeaveEvent(event);
 223
 224     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 225     m_dragging = false;
 226     setDirtyRegion(m_dropRect);
 227 }
 228
 229 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 230 {
 231     KCategorizedView::dragMoveEvent(event);
 232
 233     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 234     const QModelIndex index = indexAt(event->pos());
 235     setDirtyRegion(m_dropRect);
 236
 237     m_dropRect.setSize(QSize()); // set as invalid
 238     if (index.isValid()) {
 239         const KFileItem item = itemForIndex(index);
 240         if (!item.isNull() && item.isDir()) {
 241             m_dropRect = visualRect(index);
 242         } else {
 243             m_dropRect.setSize(QSize()); // set as invalid
 244         }
 245     }
 246     if (event->mimeData()->hasUrls()) {
 247         // accept url drops, independently from the destination item
 248         event->acceptProposedAction();
 249     }
 250
 251     setDirtyRegion(m_dropRect);
 252 }
 253
 254 void DolphinIconsView::dropEvent(QDropEvent* event)
 255 {
 256     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 257         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 258         if (!urls.isEmpty()) {
 259             const QModelIndex index = indexAt(event->pos());
 260             const KFileItem item = itemForIndex(index);
 261             m_controller->indicateDroppedUrls(urls,
 262                                               m_controller->url(),
 263                                               item);
 264             event->acceptProposedAction();
 265         }
 266     }
 267
 268     KCategorizedView::dropEvent(event);
 269
 270     m_dragging = false;
 271 }
 272
 273 void DolphinIconsView::paintEvent(QPaintEvent* event)
 274 {
 275     KCategorizedView::paintEvent(event);
 276
 277     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 278     if (m_dragging) {
 279         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 280         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 281     }
 282 }
 283
 284 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 285 {
 286     KCategorizedView::keyPressEvent(event);
 287
 288     const QItemSelectionModel* selModel = selectionModel();
 289     const QModelIndex currentIndex = selModel->currentIndex();
 290     const bool trigger = currentIndex.isValid()
 291                          && (event->key() == Qt::Key_Return)
 292                          && (selModel->selectedIndexes().count() <= 1);
 293     if (trigger) {
 294         triggerItem(currentIndex);
 295     }
 296 }
 297
 298 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 299 {
 300     KCategorizedView::wheelEvent(event);
 301
 302     if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
 303         int d = event->delta();
 304         if (d > 0) {
 305             zoomIn();
 306         } else if (d < 0) {
 307             zoomOut();
 308         }
 309     } else {
 310         // if the icons are aligned left to right, the vertical wheel event should
 311         // be applied to the horizontal scrollbar
 312         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 313         const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 314                                       (settings->arrangement() == QListView::LeftToRight);
 315         if (scrollHorizontal) {
 316             QWheelEvent horizEvent(event->pos(),
 317                                    event->delta(),
 318                                    event->buttons(),
 319                                    event->modifiers(),
 320                                    Qt::Horizontal);
 321             QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 322         }
 323     }
 324 }
 325
 326 void DolphinIconsView::triggerItem(const QModelIndex& index)
 327 {
 328     m_controller->triggerItem(itemForIndex(index));
 329 }
 330
 331 void DolphinIconsView::slotEntered(const QModelIndex& index)
 332 {
 333     m_controller->emitItemEntered(itemForIndex(index));
 334 }
 335
 336 void DolphinIconsView::slotShowPreviewChanged()
 337 {
 338     const DolphinView* view = m_controller->dolphinView();
 339     updateGridSize(view->showPreview(), additionalInfoCount());
 340 }
 341
 342 void DolphinIconsView::slotAdditionalInfoChanged()
 343 {
 344     const DolphinView* view = m_controller->dolphinView();
 345     const bool showPreview = view->showPreview();
 346     updateGridSize(showPreview, view->additionalInfo().count());
 347 }
 348
 349 void DolphinIconsView::zoomIn()
 350 {
 351     if (isZoomInPossible()) {
 352         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 353
 354         const int oldIconSize = settings->iconSize();
 355         int newIconSize = oldIconSize;
 356
 357         const bool showPreview = m_controller->dolphinView()->showPreview();
 358         if (showPreview) {
 359             const int previewSize = increasedIconSize(settings->previewSize());
 360             settings->setPreviewSize(previewSize);
 361         } else {
 362             newIconSize = increasedIconSize(oldIconSize);
 363             settings->setIconSize(newIconSize);
 364             if (settings->previewSize() < newIconSize) {
 365                 // assure that the preview size is always >= the icon size
 366                 settings->setPreviewSize(newIconSize);
 367             }
 368         }
 369
 370         // increase also the grid size
 371         const int diff = newIconSize - oldIconSize;
 372         settings->setItemWidth(settings->itemWidth() + diff);
 373         settings->setItemHeight(settings->itemHeight() + diff);
 374
 375         updateGridSize(showPreview, additionalInfoCount());
 376     }
 377 }
 378
 379 void DolphinIconsView::zoomOut()
 380 {
 381     if (isZoomOutPossible()) {
 382         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 383
 384         const int oldIconSize = settings->iconSize();
 385         int newIconSize = oldIconSize;
 386
 387         const bool showPreview = m_controller->dolphinView()->showPreview();
 388         if (showPreview) {
 389             const int previewSize = decreasedIconSize(settings->previewSize());
 390             settings->setPreviewSize(previewSize);
 391             if (settings->iconSize() > previewSize) {
 392                 // assure that the icon size is always <= the preview size
 393                 newIconSize = previewSize;
 394                 settings->setIconSize(newIconSize);
 395             }
 396         } else {
 397             newIconSize = decreasedIconSize(settings->iconSize());
 398             settings->setIconSize(newIconSize);
 399         }
 400
 401         // decrease also the grid size
 402         const int diff = oldIconSize - newIconSize;
 403         settings->setItemWidth(settings->itemWidth() - diff);
 404         settings->setItemHeight(settings->itemHeight() - diff);
 405
 406         updateGridSize(showPreview, additionalInfoCount());
 407     }
 408 }
 409
 410 void DolphinIconsView::requestActivation()
 411 {
 412     m_controller->requestActivation();
 413 }
 414
 415 bool DolphinIconsView::isZoomInPossible() const
 416 {
 417     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 418     const bool showPreview = m_controller->dolphinView()->showPreview();
 419     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 420     return size < KIconLoader::SizeEnormous;
 421 }
 422
 423 bool DolphinIconsView::isZoomOutPossible() const
 424 {
 425     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 426     const bool showPreview = m_controller->dolphinView()->showPreview();
 427     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 428     return size > KIconLoader::SizeSmall;
 429 }
 430
 431 int DolphinIconsView::increasedIconSize(int size) const
 432 {
 433     int incSize = 0;
 434     switch (size) {
 435     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 436     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 437     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 438     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 439     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 440     default: Q_ASSERT(false); break;
 441     }
 442     return incSize;
 443 }
 444
 445 int DolphinIconsView::decreasedIconSize(int size) const
 446 {
 447     int decSize = 0;
 448     switch (size) {
 449     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 450     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 451     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 452     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 453     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 454     default: Q_ASSERT(false); break;
 455     }
 456     return decSize;
 457 }
 458
 459 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 460 {
 461     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 462     Q_ASSERT(settings != 0);
 463
 464     int itemWidth = settings->itemWidth();
 465     int itemHeight = settings->itemHeight();
 466     int size = settings->iconSize();
 467
 468     if (showPreview) {
 469         const int previewSize = settings->previewSize();
 470         const int diff = previewSize - size;
 471         Q_ASSERT(diff >= 0);
 472         itemWidth  += diff;
 473         itemHeight += diff;
 474
 475         size = previewSize;
 476     }
 477     setIconSize(QSize(size, size));
 478
 479     Q_ASSERT(additionalInfoCount >= 0);
 480     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 481
 482     if (settings->arrangement() == QListView::TopToBottom) {
 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     } else {
 488         m_decorationSize = QSize(size, size);
 489     }
 490
 491     m_itemSize = QSize(itemWidth, itemHeight);
 492
 493     const int spacing = settings->gridSpacing();
 494     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 495
 496     m_controller->setZoomInPossible(isZoomInPossible());
 497     m_controller->setZoomOutPossible(isZoomOutPossible());
 498 }
 499
 500 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 501 {
 502     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 503     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 504     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 505     return dirModel->itemForIndex(dirIndex);
 506 }
 507
 508 int DolphinIconsView::additionalInfoCount() const
 509 {
 510     const DolphinView* view = m_controller->dolphinView();
 511     return view->additionalInfo().count();
 512 }
 513
 514 #include "dolphiniconsview.moc"