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                 controller, 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                 controller, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81     connect(this, SIGNAL(entered(const QModelIndex&)),
  82             controller, SLOT(emitItemEntered(const QModelIndex&)));
  83     connect(this, SIGNAL(viewportEntered()),
  84             controller, SLOT(emitViewportEntered()));
  85     connect(controller, SIGNAL(zoomIn()),
  86             this, SLOT(zoomIn()));
  87     connect(controller, SIGNAL(zoomOut()),
  88             this, SLOT(zoomOut()));
  89
  90     const DolphinView* view = controller->dolphinView();
  91     connect(view, SIGNAL(showPreviewChanged()),
  92             this, SLOT(slotShowPreviewChanged()));
  93     connect(view, SIGNAL(additionalInfoChanged()),
  94             this, SLOT(slotAdditionalInfoChanged()));
  95
  96     // apply the icons mode settings to the widget
  97     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  98     Q_ASSERT(settings != 0);
  99
 100     if (settings->useSystemFont()) {
 101         m_font = KGlobalSettings::generalFont();
 102     } else {
 103         m_font = QFont(settings->fontFamily(),
 104                        settings->fontSize(),
 105                        settings->fontWeight(),
 106                        settings->italicFont());
 107     }
 108
 109     setWordWrap(settings->numberOfTextlines() > 1);
 110     updateGridSize(view->showPreview(), 0);
 111
 112     if (settings->arrangement() == QListView::TopToBottom) {
 113         setFlow(QListView::LeftToRight);
 114         m_decorationPosition = QStyleOptionViewItem::Top;
 115         m_displayAlignment = Qt::AlignHCenter;
 116     } else {
 117         setFlow(QListView::TopToBottom);
 118         m_decorationPosition = QStyleOptionViewItem::Left;
 119         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 120     }
 121
 122     m_categoryDrawer = new DolphinCategoryDrawer();
 123     setCategoryDrawer(m_categoryDrawer);
 124
 125     setFocus();
 126
 127     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 128             this, SLOT(updateFont()));
 129 }
 130
 131 DolphinIconsView::~DolphinIconsView()
 132 {
 133     delete m_categoryDrawer;
 134     m_categoryDrawer = 0;
 135 }
 136
 137 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 138 {
 139     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 140
 141     QRect itemRect = KCategorizedView::visualRect(index);
 142
 143     const int maxWidth  = m_itemSize.width();
 144     const int maxHeight = m_itemSize.height();
 145
 146     if (itemRect.width() > maxWidth) {
 147         // assure that the maximum item width is not exceeded
 148         if (leftToRightFlow) {
 149             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 150             itemRect.setLeft(left);
 151         }
 152         itemRect.setWidth(maxWidth);
 153     }
 154
 155     if (itemRect.height() > maxHeight) {
 156         // assure that the maximum item height is not exceeded
 157         if (!leftToRightFlow) {
 158             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 159             itemRect.setTop(top);
 160         }
 161         itemRect.setHeight(maxHeight);
 162     }
 163
 164     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 165     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 166         // TODO: QListView::visualRect() calculates a wrong position of the items under
 167         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 168         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 169         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 170         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 171         const int margin = settings->gridSpacing();
 172         const int gridWidth = gridSize().width();
 173         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 174         const int centerInc = (maxWidth - itemRect.width()) / 2;
 175         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 176     }
 177
 178     return itemRect;
 179 }
 180
 181 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 182 {
 183     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 184     viewOptions.font = m_font;
 185     viewOptions.decorationPosition = m_decorationPosition;
 186     viewOptions.decorationSize = m_decorationSize;
 187     viewOptions.displayAlignment = m_displayAlignment;
 188     viewOptions.showDecorationSelected = true;
 189     return viewOptions;
 190 }
 191
 192 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 193 {
 194     KCategorizedView::contextMenuEvent(event);
 195     m_controller->triggerContextMenuRequest(event->pos());
 196 }
 197
 198 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 199 {
 200     m_controller->requestActivation();
 201     if (!indexAt(event->pos()).isValid()) {
 202         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 203         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 204             clearSelection();
 205         }
 206     }
 207
 208     KCategorizedView::mousePressEvent(event);
 209 }
 210
 211 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 212 {
 213     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 214     // fix this in KDE 4.1
 215     KCategorizedView::startDrag(supportedActions);
 216     DragAndDropHelper::startDrag(this, supportedActions);
 217 }
 218
 219 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 220 {
 221     if (event->mimeData()->hasUrls()) {
 222         event->acceptProposedAction();
 223     }
 224     m_dragging = true;
 225 }
 226
 227 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 228 {
 229     KCategorizedView::dragLeaveEvent(event);
 230
 231     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 232     m_dragging = false;
 233     setDirtyRegion(m_dropRect);
 234 }
 235
 236 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 237 {
 238     KCategorizedView::dragMoveEvent(event);
 239
 240     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 241     const QModelIndex index = indexAt(event->pos());
 242     setDirtyRegion(m_dropRect);
 243
 244     m_dropRect.setSize(QSize()); // set as invalid
 245     if (index.isValid()) {
 246         const KFileItem item = m_controller->itemForIndex(index);
 247         if (!item.isNull() && item.isDir()) {
 248             m_dropRect = visualRect(index);
 249         } else {
 250             m_dropRect.setSize(QSize()); // set as invalid
 251         }
 252     }
 253     if (event->mimeData()->hasUrls()) {
 254         // accept url drops, independently from the destination item
 255         event->acceptProposedAction();
 256     }
 257
 258     setDirtyRegion(m_dropRect);
 259 }
 260
 261 void DolphinIconsView::dropEvent(QDropEvent* event)
 262 {
 263     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 264         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 265         if (!urls.isEmpty()) {
 266             const QModelIndex index = indexAt(event->pos());
 267             const KFileItem item = m_controller->itemForIndex(index);
 268             m_controller->indicateDroppedUrls(urls,
 269                                               m_controller->url(),
 270                                               item);
 271             event->acceptProposedAction();
 272         }
 273     }
 274
 275     KCategorizedView::dropEvent(event);
 276
 277     m_dragging = false;
 278 }
 279
 280 void DolphinIconsView::paintEvent(QPaintEvent* event)
 281 {
 282     KCategorizedView::paintEvent(event);
 283
 284     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 285     if (m_dragging) {
 286         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 287         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 288     }
 289 }
 290
 291 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 292 {
 293     KCategorizedView::keyPressEvent(event);
 294     m_controller->handleKeyPressEvent(event);
 295 }
 296
 297 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 298 {
 299     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 300     // (installing an event filter does not work, as the wheel event is handled first)
 301     if (event->modifiers() & Qt::ControlModifier) {
 302         event->ignore();
 303         return;
 304     }
 305     KCategorizedView::wheelEvent(event);
 306     // if the icons are aligned left to right, the vertical wheel event should
 307     // be applied to the horizontal scrollbar
 308     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 309     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 310                                   (settings->arrangement() == QListView::LeftToRight);
 311     if (scrollHorizontal) {
 312         QWheelEvent horizEvent(event->pos(),
 313                                event->delta(),
 314                                event->buttons(),
 315                                event->modifiers(),
 316                                Qt::Horizontal);
 317         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 318     }
 319 }
 320
 321 void DolphinIconsView::slotShowPreviewChanged()
 322 {
 323     const DolphinView* view = m_controller->dolphinView();
 324     updateGridSize(view->showPreview(), additionalInfoCount());
 325 }
 326
 327 void DolphinIconsView::slotAdditionalInfoChanged()
 328 {
 329     const DolphinView* view = m_controller->dolphinView();
 330     const bool showPreview = view->showPreview();
 331     updateGridSize(showPreview, view->additionalInfo().count());
 332 }
 333
 334 void DolphinIconsView::zoomIn()
 335 {
 336     if (isZoomInPossible()) {
 337         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 338
 339         const int oldIconSize = settings->iconSize();
 340         int newIconSize = oldIconSize;
 341
 342         const bool showPreview = m_controller->dolphinView()->showPreview();
 343         if (showPreview) {
 344             const int previewSize = increasedIconSize(settings->previewSize());
 345             settings->setPreviewSize(previewSize);
 346         } else {
 347             newIconSize = increasedIconSize(oldIconSize);
 348             settings->setIconSize(newIconSize);
 349             if (settings->previewSize() < newIconSize) {
 350                 // assure that the preview size is always >= the icon size
 351                 settings->setPreviewSize(newIconSize);
 352             }
 353         }
 354
 355         // increase also the grid size
 356         const int diff = newIconSize - oldIconSize;
 357         settings->setItemWidth(settings->itemWidth() + diff);
 358         settings->setItemHeight(settings->itemHeight() + diff);
 359
 360         updateGridSize(showPreview, additionalInfoCount());
 361     }
 362 }
 363
 364 void DolphinIconsView::zoomOut()
 365 {
 366     if (isZoomOutPossible()) {
 367         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 368
 369         const int oldIconSize = settings->iconSize();
 370         int newIconSize = oldIconSize;
 371
 372         const bool showPreview = m_controller->dolphinView()->showPreview();
 373         if (showPreview) {
 374             const int previewSize = decreasedIconSize(settings->previewSize());
 375             settings->setPreviewSize(previewSize);
 376             if (settings->iconSize() > previewSize) {
 377                 // assure that the icon size is always <= the preview size
 378                 newIconSize = previewSize;
 379                 settings->setIconSize(newIconSize);
 380             }
 381         } else {
 382             newIconSize = decreasedIconSize(settings->iconSize());
 383             settings->setIconSize(newIconSize);
 384         }
 385
 386         // decrease also the grid size
 387         const int diff = oldIconSize - newIconSize;
 388         settings->setItemWidth(settings->itemWidth() - diff);
 389         settings->setItemHeight(settings->itemHeight() - diff);
 390
 391         updateGridSize(showPreview, additionalInfoCount());
 392     }
 393 }
 394
 395 void DolphinIconsView::requestActivation()
 396 {
 397     m_controller->requestActivation();
 398 }
 399
 400 void DolphinIconsView::updateFont()
 401 {
 402     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 403     Q_ASSERT(settings != 0);
 404
 405     if (settings->useSystemFont()) {
 406         m_font = KGlobalSettings::generalFont();
 407     }
 408 }
 409
 410 bool DolphinIconsView::isZoomInPossible() const
 411 {
 412     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 413     const bool showPreview = m_controller->dolphinView()->showPreview();
 414     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 415     return size < KIconLoader::SizeEnormous;
 416 }
 417
 418 bool DolphinIconsView::isZoomOutPossible() const
 419 {
 420     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 421     const bool showPreview = m_controller->dolphinView()->showPreview();
 422     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 423     return size > KIconLoader::SizeSmall;
 424 }
 425
 426 int DolphinIconsView::increasedIconSize(int size) const
 427 {
 428     int incSize = 0;
 429     switch (size) {
 430     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 431     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 432     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 433     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 434     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 435     default: Q_ASSERT(false); break;
 436     }
 437     return incSize;
 438 }
 439
 440 int DolphinIconsView::decreasedIconSize(int size) const
 441 {
 442     int decSize = 0;
 443     switch (size) {
 444     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 445     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 446     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 447     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 448     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 449     default: Q_ASSERT(false); break;
 450     }
 451     return decSize;
 452 }
 453
 454 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 455 {
 456     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 457     Q_ASSERT(settings != 0);
 458
 459     int itemWidth = settings->itemWidth();
 460     int itemHeight = settings->itemHeight();
 461     int size = settings->iconSize();
 462
 463     if (showPreview) {
 464         const int previewSize = settings->previewSize();
 465         const int diff = previewSize - size;
 466         Q_ASSERT(diff >= 0);
 467         itemWidth  += diff;
 468         itemHeight += diff;
 469
 470         size = previewSize;
 471     }
 472     setIconSize(QSize(size, size));
 473
 474     Q_ASSERT(additionalInfoCount >= 0);
 475     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 476
 477     if (settings->arrangement() == QListView::TopToBottom) {
 478         // The decoration width indirectly defines the maximum
 479         // width for the text wrapping. To use the maximum item width
 480         // for text wrapping, it is used as decoration width.
 481         m_decorationSize = QSize(itemWidth, size);
 482     } else {
 483         m_decorationSize = QSize(size, size);
 484     }
 485
 486     m_itemSize = QSize(itemWidth, itemHeight);
 487
 488     const int spacing = settings->gridSpacing();
 489     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 490
 491     m_controller->setZoomInPossible(isZoomInPossible());
 492     m_controller->setZoomOutPossible(isZoomOutPossible());
 493 }
 494
 495 int DolphinIconsView::additionalInfoCount() const
 496 {
 497     const DolphinView* view = m_controller->dolphinView();
 498     return view->additionalInfo().count();
 499 }
 500
 501 #include "dolphiniconsview.moc"