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     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(kdisplayFontChanged()),
 129             this, SLOT(updateFont()));
 130 }
 131
 132 DolphinIconsView::~DolphinIconsView()
 133 {
 134     delete m_categoryDrawer;
 135     m_categoryDrawer = 0;
 136 }
 137
 138 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 139 {
 140     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 141
 142     QRect itemRect = KCategorizedView::visualRect(index);
 143
 144     const int maxWidth  = m_itemSize.width();
 145     const int maxHeight = m_itemSize.height();
 146
 147     if (itemRect.width() > maxWidth) {
 148         // assure that the maximum item width is not exceeded
 149         if (leftToRightFlow) {
 150             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 151             itemRect.setLeft(left);
 152         }
 153         itemRect.setWidth(maxWidth);
 154     }
 155
 156     if (itemRect.height() > maxHeight) {
 157         // assure that the maximum item height is not exceeded
 158         if (!leftToRightFlow) {
 159             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 160             itemRect.setTop(top);
 161         }
 162         itemRect.setHeight(maxHeight);
 163     }
 164
 165     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 166     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 167         // TODO: QListView::visualRect() calculates a wrong position of the items under
 168         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 169         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 170         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 171         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 172         const int margin = settings->gridSpacing();
 173         const int gridWidth = gridSize().width();
 174         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 175         const int centerInc = (maxWidth - itemRect.width()) / 2;
 176         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 177     }
 178
 179     return itemRect;
 180 }
 181
 182 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 183 {
 184     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 185     viewOptions.font = m_font;
 186     viewOptions.decorationPosition = m_decorationPosition;
 187     viewOptions.decorationSize = m_decorationSize;
 188     viewOptions.displayAlignment = m_displayAlignment;
 189     viewOptions.showDecorationSelected = true;
 190     return viewOptions;
 191 }
 192
 193 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 194 {
 195     KCategorizedView::contextMenuEvent(event);
 196     m_controller->triggerContextMenuRequest(event->pos());
 197 }
 198
 199 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 200 {
 201     m_controller->requestActivation();
 202     if (!indexAt(event->pos()).isValid()) {
 203         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 204         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 205             clearSelection();
 206         }
 207     }
 208
 209     KCategorizedView::mousePressEvent(event);
 210 }
 211
 212 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 213 {
 214     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 215     // fix this in KDE 4.1
 216     KCategorizedView::startDrag(supportedActions);
 217     DragAndDropHelper::startDrag(this, supportedActions);
 218 }
 219
 220 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 221 {
 222     if (event->mimeData()->hasUrls()) {
 223         event->acceptProposedAction();
 224     }
 225     m_dragging = true;
 226 }
 227
 228 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 229 {
 230     KCategorizedView::dragLeaveEvent(event);
 231
 232     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 233     m_dragging = false;
 234     setDirtyRegion(m_dropRect);
 235 }
 236
 237 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 238 {
 239     KCategorizedView::dragMoveEvent(event);
 240
 241     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 242     const QModelIndex index = indexAt(event->pos());
 243     setDirtyRegion(m_dropRect);
 244
 245     m_dropRect.setSize(QSize()); // set as invalid
 246     if (index.isValid()) {
 247         const KFileItem item = itemForIndex(index);
 248         if (!item.isNull() && item.isDir()) {
 249             m_dropRect = visualRect(index);
 250         } else {
 251             m_dropRect.setSize(QSize()); // set as invalid
 252         }
 253     }
 254     if (event->mimeData()->hasUrls()) {
 255         // accept url drops, independently from the destination item
 256         event->acceptProposedAction();
 257     }
 258
 259     setDirtyRegion(m_dropRect);
 260 }
 261
 262 void DolphinIconsView::dropEvent(QDropEvent* event)
 263 {
 264     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 265         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 266         if (!urls.isEmpty()) {
 267             const QModelIndex index = indexAt(event->pos());
 268             const KFileItem item = itemForIndex(index);
 269             m_controller->indicateDroppedUrls(urls,
 270                                               m_controller->url(),
 271                                               item);
 272             event->acceptProposedAction();
 273         }
 274     }
 275
 276     KCategorizedView::dropEvent(event);
 277
 278     m_dragging = false;
 279 }
 280
 281 void DolphinIconsView::paintEvent(QPaintEvent* event)
 282 {
 283     KCategorizedView::paintEvent(event);
 284
 285     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 286     if (m_dragging) {
 287         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 288         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 289     }
 290 }
 291
 292 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 293 {
 294     KCategorizedView::keyPressEvent(event);
 295
 296     const QItemSelectionModel* selModel = selectionModel();
 297     const QModelIndex currentIndex = selModel->currentIndex();
 298     const bool trigger = currentIndex.isValid()
 299                          && (event->key() == Qt::Key_Return)
 300                          && (selModel->selectedIndexes().count() <= 1);
 301     if (trigger) {
 302         triggerItem(currentIndex);
 303     }
 304 }
 305
 306 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 307 {
 308     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 309     if ((event->modifiers() & Qt::ControlModifier) == Qt::ControlModifier) {
 310         event->ignore();
 311         return;
 312     }
 313     KCategorizedView::wheelEvent(event);
 314     // if the icons are aligned left to right, the vertical wheel event should
 315     // be applied to the horizontal scrollbar
 316     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 317     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 318                                   (settings->arrangement() == QListView::LeftToRight);
 319     if (scrollHorizontal) {
 320         QWheelEvent horizEvent(event->pos(),
 321                                event->delta(),
 322                                event->buttons(),
 323                                event->modifiers(),
 324                                Qt::Horizontal);
 325         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 326     }
 327 }
 328
 329 void DolphinIconsView::triggerItem(const QModelIndex& index)
 330 {
 331     m_controller->triggerItem(itemForIndex(index));
 332 }
 333
 334 void DolphinIconsView::slotEntered(const QModelIndex& index)
 335 {
 336     m_controller->emitItemEntered(itemForIndex(index));
 337 }
 338
 339 void DolphinIconsView::slotShowPreviewChanged()
 340 {
 341     const DolphinView* view = m_controller->dolphinView();
 342     updateGridSize(view->showPreview(), additionalInfoCount());
 343 }
 344
 345 void DolphinIconsView::slotAdditionalInfoChanged()
 346 {
 347     const DolphinView* view = m_controller->dolphinView();
 348     const bool showPreview = view->showPreview();
 349     updateGridSize(showPreview, view->additionalInfo().count());
 350 }
 351
 352 void DolphinIconsView::zoomIn()
 353 {
 354     if (isZoomInPossible()) {
 355         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 356
 357         const int oldIconSize = settings->iconSize();
 358         int newIconSize = oldIconSize;
 359
 360         const bool showPreview = m_controller->dolphinView()->showPreview();
 361         if (showPreview) {
 362             const int previewSize = increasedIconSize(settings->previewSize());
 363             settings->setPreviewSize(previewSize);
 364         } else {
 365             newIconSize = increasedIconSize(oldIconSize);
 366             settings->setIconSize(newIconSize);
 367             if (settings->previewSize() < newIconSize) {
 368                 // assure that the preview size is always >= the icon size
 369                 settings->setPreviewSize(newIconSize);
 370             }
 371         }
 372
 373         // increase also the grid size
 374         const int diff = newIconSize - oldIconSize;
 375         settings->setItemWidth(settings->itemWidth() + diff);
 376         settings->setItemHeight(settings->itemHeight() + diff);
 377
 378         updateGridSize(showPreview, additionalInfoCount());
 379     }
 380 }
 381
 382 void DolphinIconsView::zoomOut()
 383 {
 384     if (isZoomOutPossible()) {
 385         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 386
 387         const int oldIconSize = settings->iconSize();
 388         int newIconSize = oldIconSize;
 389
 390         const bool showPreview = m_controller->dolphinView()->showPreview();
 391         if (showPreview) {
 392             const int previewSize = decreasedIconSize(settings->previewSize());
 393             settings->setPreviewSize(previewSize);
 394             if (settings->iconSize() > previewSize) {
 395                 // assure that the icon size is always <= the preview size
 396                 newIconSize = previewSize;
 397                 settings->setIconSize(newIconSize);
 398             }
 399         } else {
 400             newIconSize = decreasedIconSize(settings->iconSize());
 401             settings->setIconSize(newIconSize);
 402         }
 403
 404         // decrease also the grid size
 405         const int diff = oldIconSize - newIconSize;
 406         settings->setItemWidth(settings->itemWidth() - diff);
 407         settings->setItemHeight(settings->itemHeight() - diff);
 408
 409         updateGridSize(showPreview, additionalInfoCount());
 410     }
 411 }
 412
 413 void DolphinIconsView::requestActivation()
 414 {
 415     m_controller->requestActivation();
 416 }
 417
 418 void DolphinIconsView::updateFont()
 419 {
 420     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 421     Q_ASSERT(settings != 0);
 422
 423     if (settings->useSystemFont()) {
 424         m_font = KGlobalSettings::generalFont();
 425     }
 426 }
 427
 428 bool DolphinIconsView::isZoomInPossible() const
 429 {
 430     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 431     const bool showPreview = m_controller->dolphinView()->showPreview();
 432     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 433     return size < KIconLoader::SizeEnormous;
 434 }
 435
 436 bool DolphinIconsView::isZoomOutPossible() const
 437 {
 438     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 439     const bool showPreview = m_controller->dolphinView()->showPreview();
 440     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 441     return size > KIconLoader::SizeSmall;
 442 }
 443
 444 int DolphinIconsView::increasedIconSize(int size) const
 445 {
 446     int incSize = 0;
 447     switch (size) {
 448     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 449     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 450     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 451     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 452     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 453     default: Q_ASSERT(false); break;
 454     }
 455     return incSize;
 456 }
 457
 458 int DolphinIconsView::decreasedIconSize(int size) const
 459 {
 460     int decSize = 0;
 461     switch (size) {
 462     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 463     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 464     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 465     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 466     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 467     default: Q_ASSERT(false); break;
 468     }
 469     return decSize;
 470 }
 471
 472 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 473 {
 474     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 475     Q_ASSERT(settings != 0);
 476
 477     int itemWidth = settings->itemWidth();
 478     int itemHeight = settings->itemHeight();
 479     int size = settings->iconSize();
 480
 481     if (showPreview) {
 482         const int previewSize = settings->previewSize();
 483         const int diff = previewSize - size;
 484         Q_ASSERT(diff >= 0);
 485         itemWidth  += diff;
 486         itemHeight += diff;
 487
 488         size = previewSize;
 489     }
 490     setIconSize(QSize(size, size));
 491
 492     Q_ASSERT(additionalInfoCount >= 0);
 493     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 494
 495     if (settings->arrangement() == QListView::TopToBottom) {
 496         // The decoration width indirectly defines the maximum
 497         // width for the text wrapping. To use the maximum item width
 498         // for text wrapping, it is used as decoration width.
 499         m_decorationSize = QSize(itemWidth, size);
 500     } else {
 501         m_decorationSize = QSize(size, size);
 502     }
 503
 504     m_itemSize = QSize(itemWidth, itemHeight);
 505
 506     const int spacing = settings->gridSpacing();
 507     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 508
 509     m_controller->setZoomInPossible(isZoomInPossible());
 510     m_controller->setZoomOutPossible(isZoomOutPossible());
 511 }
 512
 513 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 514 {
 515     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 516     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 517     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 518     return dirModel->itemForIndex(dirIndex);
 519 }
 520
 521 int DolphinIconsView::additionalInfoCount() const
 522 {
 523     const DolphinView* view = m_controller->dolphinView();
 524     return view->additionalInfo().count();
 525 }
 526
 527 #include "dolphiniconsview.moc"