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_dropRect()
  50 {
  51     Q_ASSERT(controller != 0);
  52     setViewMode(QListView::IconMode);
  53     setResizeMode(QListView::Adjust);
  54     setSpacing(KDialog::spacingHint());
  55     setMovement(QListView::Static);
  56     setDragEnabled(true);
  57     viewport()->setAcceptDrops(true);
  58
  59     setMouseTracking(true);
  60
  61     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  62     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  63     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  64     // RETURN-key in keyPressEvent().
  65     if (KGlobalSettings::singleClick()) {
  66         connect(this, SIGNAL(clicked(const QModelIndex&)),
  67                 controller, SLOT(triggerItem(const QModelIndex&)));
  68         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  69             SelectionManager* selManager = new SelectionManager(this);
  70             connect(selManager, SIGNAL(selectionChanged()),
  71                     this, SLOT(requestActivation()));
  72             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  73                     selManager, SLOT(reset()));
  74         }
  75     } else {
  76         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  77                 controller, SLOT(triggerItem(const QModelIndex&)));
  78     }
  79     connect(this, SIGNAL(entered(const QModelIndex&)),
  80             controller, SLOT(emitItemEntered(const QModelIndex&)));
  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     // apply the icons mode settings to the widget
  95     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  96     Q_ASSERT(settings != 0);
  97
  98     if (settings->useSystemFont()) {
  99         m_font = KGlobalSettings::generalFont();
 100     } else {
 101         m_font = QFont(settings->fontFamily(),
 102                        settings->fontSize(),
 103                        settings->fontWeight(),
 104                        settings->italicFont());
 105     }
 106
 107     setWordWrap(settings->numberOfTextlines() > 1);
 108     updateGridSize(view->showPreview(), 0);
 109
 110     if (settings->arrangement() == QListView::TopToBottom) {
 111         setFlow(QListView::LeftToRight);
 112         m_decorationPosition = QStyleOptionViewItem::Top;
 113         m_displayAlignment = Qt::AlignHCenter;
 114     } else {
 115         setFlow(QListView::TopToBottom);
 116         m_decorationPosition = QStyleOptionViewItem::Left;
 117         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 118     }
 119
 120     m_categoryDrawer = new DolphinCategoryDrawer();
 121     setCategoryDrawer(m_categoryDrawer);
 122
 123     setFocus();
 124
 125     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 126             this, SLOT(updateFont()));
 127 }
 128
 129 DolphinIconsView::~DolphinIconsView()
 130 {
 131     delete m_categoryDrawer;
 132     m_categoryDrawer = 0;
 133 }
 134
 135 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 136 {
 137     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 138
 139     QRect itemRect = KCategorizedView::visualRect(index);
 140
 141     const int maxWidth  = m_itemSize.width();
 142     const int maxHeight = m_itemSize.height();
 143
 144     if (itemRect.width() > maxWidth) {
 145         // assure that the maximum item width is not exceeded
 146         if (leftToRightFlow) {
 147             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 148             itemRect.setLeft(left);
 149         }
 150         itemRect.setWidth(maxWidth);
 151     }
 152
 153     if (itemRect.height() > maxHeight) {
 154         // assure that the maximum item height is not exceeded
 155         if (!leftToRightFlow) {
 156             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 157             itemRect.setTop(top);
 158         }
 159         itemRect.setHeight(maxHeight);
 160     }
 161
 162     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 163     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 164         // TODO: QListView::visualRect() calculates a wrong position of the items under
 165         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 166         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 167         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 168         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 169         const int margin = settings->gridSpacing();
 170         const int gridWidth = gridSize().width();
 171         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 172         const int centerInc = (maxWidth - itemRect.width()) / 2;
 173         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 174     }
 175
 176     return itemRect;
 177 }
 178
 179 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 180 {
 181     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 182     viewOptions.font = m_font;
 183     viewOptions.decorationPosition = m_decorationPosition;
 184     viewOptions.decorationSize = m_decorationSize;
 185     viewOptions.displayAlignment = m_displayAlignment;
 186     viewOptions.showDecorationSelected = true;
 187     return viewOptions;
 188 }
 189
 190 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 191 {
 192     KCategorizedView::contextMenuEvent(event);
 193     m_controller->triggerContextMenuRequest(event->pos());
 194 }
 195
 196 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 197 {
 198     m_controller->requestActivation();
 199     if (!indexAt(event->pos()).isValid()) {
 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::startDrag(this, supportedActions);
 215 }
 216
 217 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 218 {
 219     if (event->mimeData()->hasUrls()) {
 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 (event->mimeData()->hasUrls()) {
 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     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 258         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 259         if (!urls.isEmpty()) {
 260             const QModelIndex index = indexAt(event->pos());
 261             const KFileItem item = m_controller->itemForIndex(index);
 262             m_controller->indicateDroppedUrls(urls,
 263                                               m_controller->url(),
 264                                               item);
 265             event->acceptProposedAction();
 266         }
 267     }
 268
 269     KCategorizedView::dropEvent(event);
 270 }
 271
 272 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 273 {
 274     KCategorizedView::keyPressEvent(event);
 275     m_controller->handleKeyPressEvent(event);
 276 }
 277
 278 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 279 {
 280     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 281     if (event->modifiers() & Qt::ControlModifier) {
 282         event->ignore();
 283         return;
 284     }
 285     KCategorizedView::wheelEvent(event);
 286     // if the icons are aligned left to right, the vertical wheel event should
 287     // be applied to the horizontal scrollbar
 288     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 289     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 290                                   (settings->arrangement() == QListView::LeftToRight);
 291     if (scrollHorizontal) {
 292         QWheelEvent horizEvent(event->pos(),
 293                                event->delta(),
 294                                event->buttons(),
 295                                event->modifiers(),
 296                                Qt::Horizontal);
 297         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 298     }
 299 }
 300
 301 void DolphinIconsView::slotShowPreviewChanged()
 302 {
 303     const DolphinView* view = m_controller->dolphinView();
 304     updateGridSize(view->showPreview(), additionalInfoCount());
 305 }
 306
 307 void DolphinIconsView::slotAdditionalInfoChanged()
 308 {
 309     const DolphinView* view = m_controller->dolphinView();
 310     const bool showPreview = view->showPreview();
 311     updateGridSize(showPreview, view->additionalInfo().count());
 312 }
 313
 314 void DolphinIconsView::zoomIn()
 315 {
 316     if (isZoomInPossible()) {
 317         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 318
 319         const int oldIconSize = settings->iconSize();
 320         int newIconSize = oldIconSize;
 321
 322         const bool showPreview = m_controller->dolphinView()->showPreview();
 323         if (showPreview) {
 324             const int previewSize = increasedIconSize(settings->previewSize());
 325             settings->setPreviewSize(previewSize);
 326         } else {
 327             newIconSize = increasedIconSize(oldIconSize);
 328             settings->setIconSize(newIconSize);
 329             if (settings->previewSize() < newIconSize) {
 330                 // assure that the preview size is always >= the icon size
 331                 settings->setPreviewSize(newIconSize);
 332             }
 333         }
 334
 335         // increase also the grid size
 336         const int diff = newIconSize - oldIconSize;
 337         settings->setItemWidth(settings->itemWidth() + diff);
 338         settings->setItemHeight(settings->itemHeight() + diff);
 339
 340         updateGridSize(showPreview, additionalInfoCount());
 341     }
 342 }
 343
 344 void DolphinIconsView::zoomOut()
 345 {
 346     if (isZoomOutPossible()) {
 347         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 348
 349         const int oldIconSize = settings->iconSize();
 350         int newIconSize = oldIconSize;
 351
 352         const bool showPreview = m_controller->dolphinView()->showPreview();
 353         if (showPreview) {
 354             const int previewSize = decreasedIconSize(settings->previewSize());
 355             settings->setPreviewSize(previewSize);
 356             if (settings->iconSize() > previewSize) {
 357                 // assure that the icon size is always <= the preview size
 358                 newIconSize = previewSize;
 359                 settings->setIconSize(newIconSize);
 360             }
 361         } else {
 362             newIconSize = decreasedIconSize(settings->iconSize());
 363             settings->setIconSize(newIconSize);
 364         }
 365
 366         // decrease also the grid size
 367         const int diff = oldIconSize - newIconSize;
 368         settings->setItemWidth(settings->itemWidth() - diff);
 369         settings->setItemHeight(settings->itemHeight() - diff);
 370
 371         updateGridSize(showPreview, additionalInfoCount());
 372     }
 373 }
 374
 375 void DolphinIconsView::requestActivation()
 376 {
 377     m_controller->requestActivation();
 378 }
 379
 380 void DolphinIconsView::updateFont()
 381 {
 382     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 383     Q_ASSERT(settings != 0);
 384
 385     if (settings->useSystemFont()) {
 386         m_font = KGlobalSettings::generalFont();
 387     }
 388 }
 389
 390 bool DolphinIconsView::isZoomInPossible() const
 391 {
 392     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 393     const bool showPreview = m_controller->dolphinView()->showPreview();
 394     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 395     return size < KIconLoader::SizeEnormous;
 396 }
 397
 398 bool DolphinIconsView::isZoomOutPossible() const
 399 {
 400     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 401     const bool showPreview = m_controller->dolphinView()->showPreview();
 402     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 403     return size > KIconLoader::SizeSmall;
 404 }
 405
 406 int DolphinIconsView::increasedIconSize(int size) const
 407 {
 408     int incSize = 0;
 409     switch (size) {
 410     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 411     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 412     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 413     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 414     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 415     default: Q_ASSERT(false); break;
 416     }
 417     return incSize;
 418 }
 419
 420 int DolphinIconsView::decreasedIconSize(int size) const
 421 {
 422     int decSize = 0;
 423     switch (size) {
 424     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 425     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 426     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 427     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 428     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 429     default: Q_ASSERT(false); break;
 430     }
 431     return decSize;
 432 }
 433
 434 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 435 {
 436     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 437     Q_ASSERT(settings != 0);
 438
 439     int itemWidth = settings->itemWidth();
 440     int itemHeight = settings->itemHeight();
 441     int size = settings->iconSize();
 442
 443     if (showPreview) {
 444         const int previewSize = settings->previewSize();
 445         const int diff = previewSize - size;
 446         Q_ASSERT(diff >= 0);
 447         itemWidth  += diff;
 448         itemHeight += diff;
 449
 450         size = previewSize;
 451     }
 452
 453     Q_ASSERT(additionalInfoCount >= 0);
 454     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 455
 456     if (settings->arrangement() == QListView::TopToBottom) {
 457         // The decoration width indirectly defines the maximum
 458         // width for the text wrapping. To use the maximum item width
 459         // for text wrapping, it is used as decoration width.
 460         m_decorationSize = QSize(itemWidth, size);
 461         setIconSize(QSize(itemWidth, size));
 462     } else {
 463         m_decorationSize = QSize(size, size);
 464         setIconSize(QSize(size, size));
 465     }
 466
 467     m_itemSize = QSize(itemWidth, itemHeight);
 468
 469     const int spacing = settings->gridSpacing();
 470     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 471
 472     m_controller->setZoomInPossible(isZoomInPossible());
 473     m_controller->setZoomOutPossible(isZoomOutPossible());
 474 }
 475
 476 int DolphinIconsView::additionalInfoCount() const
 477 {
 478     const DolphinView* view = m_controller->dolphinView();
 479     return view->additionalInfo().count();
 480 }
 481
 482 #include "dolphiniconsview.moc"