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