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 #include <QScrollBar>
  37
  38 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  39     KCategorizedView(parent),
  40     m_controller(controller),
  41     m_categoryDrawer(0),
  42     m_font(),
  43     m_decorationSize(),
  44     m_decorationPosition(QStyleOptionViewItem::Top),
  45     m_displayAlignment(Qt::AlignHCenter),
  46     m_itemSize(),
  47     m_dragging(false),
  48     m_dropRect()
  49 {
  50     Q_ASSERT(controller != 0);
  51     setViewMode(QListView::IconMode);
  52     setResizeMode(QListView::Adjust);
  53     setSpacing(KDialog::spacingHint());
  54     setMovement(QListView::Static);
  55     setDragEnabled(true);
  56     viewport()->setAcceptDrops(true);
  57
  58     setMouseTracking(true);
  59     viewport()->setAttribute(Qt::WA_Hover);
  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                 this, SLOT(triggerItem(const QModelIndex&)));
  68     } else {
  69         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  70                 this, SLOT(triggerItem(const QModelIndex&)));
  71     }
  72     connect(this, SIGNAL(viewportEntered()),
  73             controller, SLOT(emitViewportEntered()));
  74     connect(controller, SIGNAL(zoomIn()),
  75             this, SLOT(zoomIn()));
  76     connect(controller, SIGNAL(zoomOut()),
  77             this, SLOT(zoomOut()));
  78
  79     const DolphinView* view = controller->dolphinView();
  80     connect(view, SIGNAL(showPreviewChanged()),
  81             this, SLOT(slotShowPreviewChanged()));
  82     connect(view, SIGNAL(additionalInfoChanged()),
  83             this, SLOT(slotAdditionalInfoChanged()));
  84
  85     connect(this, SIGNAL(entered(const QModelIndex&)),
  86             this, SLOT(slotEntered(const QModelIndex&)));
  87
  88     // apply the icons mode settings to the widget
  89     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  90     Q_ASSERT(settings != 0);
  91
  92     m_font = QFont(settings->fontFamily(), settings->fontSize());
  93     m_font.setItalic(settings->italicFont());
  94     m_font.setBold(settings->boldFont());
  95
  96     setWordWrap(settings->numberOfTextlines() > 1);
  97     updateGridSize(view->showPreview(), 0);
  98
  99     if (settings->arrangement() == QListView::TopToBottom) {
 100         setFlow(QListView::LeftToRight);
 101         m_decorationPosition = QStyleOptionViewItem::Top;
 102         m_displayAlignment = Qt::AlignHCenter;
 103     } else {
 104         setFlow(QListView::TopToBottom);
 105         m_decorationPosition = QStyleOptionViewItem::Left;
 106         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 107     }
 108
 109     m_categoryDrawer = new DolphinCategoryDrawer();
 110     setCategoryDrawer(m_categoryDrawer);
 111
 112     setFocus();
 113 }
 114
 115 DolphinIconsView::~DolphinIconsView()
 116 {
 117     delete m_categoryDrawer;
 118     m_categoryDrawer = 0;
 119 }
 120
 121 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 122 {
 123     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 124
 125     QRect itemRect = KCategorizedView::visualRect(index);
 126
 127     const int maxWidth  = m_itemSize.width();
 128     const int maxHeight = m_itemSize.height();
 129
 130     if (itemRect.width() > maxWidth) {
 131         // assure that the maximum item width is not exceeded
 132         if (leftToRightFlow) {
 133             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 134             itemRect.setLeft(left);
 135         }
 136         itemRect.setWidth(maxWidth);
 137     }
 138
 139     if (itemRect.height() > maxHeight) {
 140         // assure that the maximum item height is not exceeded
 141         if (!leftToRightFlow) {
 142             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 143             itemRect.setTop(top);
 144         }
 145         itemRect.setHeight(maxHeight);
 146     }
 147
 148     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 149     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 150         // TODO: QListView::visualRect() calculates a wrong position of the items under
 151         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 152         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 153         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 154         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 155         const int margin = settings->gridSpacing();
 156         const int gridWidth = gridSize().width();
 157         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 158         const int centerInc = (maxWidth - itemRect.width()) / 2;
 159         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 160     }
 161
 162     return itemRect;
 163 }
 164
 165 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 166 {
 167     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 168     viewOptions.font = m_font;
 169     viewOptions.decorationPosition = m_decorationPosition;
 170     viewOptions.decorationSize = m_decorationSize;
 171     viewOptions.displayAlignment = m_displayAlignment;
 172     viewOptions.showDecorationSelected = true;
 173     return viewOptions;
 174 }
 175
 176 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 177 {
 178     KCategorizedView::contextMenuEvent(event);
 179     m_controller->triggerContextMenuRequest(event->pos());
 180 }
 181
 182 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 183 {
 184     m_controller->requestActivation();
 185     if (!indexAt(event->pos()).isValid()) {
 186         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 187         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 188             clearSelection();
 189         }
 190     }
 191
 192     KCategorizedView::mousePressEvent(event);
 193 }
 194
 195 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 196 {
 197     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 198     // fix this in KDE 4.1
 199     KCategorizedView::startDrag(supportedActions);
 200     DragAndDropHelper::startDrag(this, supportedActions);
 201 }
 202
 203 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 204 {
 205     if (event->mimeData()->hasUrls()) {
 206         event->acceptProposedAction();
 207     }
 208     m_dragging = true;
 209 }
 210
 211 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 212 {
 213     KCategorizedView::dragLeaveEvent(event);
 214
 215     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 216     m_dragging = false;
 217     setDirtyRegion(m_dropRect);
 218 }
 219
 220 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 221 {
 222     KCategorizedView::dragMoveEvent(event);
 223
 224     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 225     const QModelIndex index = indexAt(event->pos());
 226     setDirtyRegion(m_dropRect);
 227
 228     m_dropRect.setSize(QSize()); // set as invalid
 229     if (index.isValid()) {
 230         const KFileItem item = itemForIndex(index);
 231         if (!item.isNull() && item.isDir()) {
 232             m_dropRect = visualRect(index);
 233         } else {
 234             m_dropRect.setSize(QSize()); // set as invalid
 235         }
 236     }
 237     if (event->mimeData()->hasUrls()) {
 238         // accept url drops, independently from the destination item
 239         event->acceptProposedAction();
 240     }
 241
 242     setDirtyRegion(m_dropRect);
 243 }
 244
 245 void DolphinIconsView::dropEvent(QDropEvent* event)
 246 {
 247     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 248         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 249         if (!urls.isEmpty()) {
 250             const QModelIndex index = indexAt(event->pos());
 251             const KFileItem item = itemForIndex(index);
 252             m_controller->indicateDroppedUrls(urls,
 253                                               m_controller->url(),
 254                                               item);
 255             event->acceptProposedAction();
 256         }
 257     }
 258
 259     KCategorizedView::dropEvent(event);
 260
 261     m_dragging = false;
 262 }
 263
 264 void DolphinIconsView::paintEvent(QPaintEvent* event)
 265 {
 266     KCategorizedView::paintEvent(event);
 267
 268     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 269     if (m_dragging) {
 270         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 271         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 272     }
 273 }
 274
 275 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 276 {
 277     KCategorizedView::keyPressEvent(event);
 278
 279     const QItemSelectionModel* selModel = selectionModel();
 280     const QModelIndex currentIndex = selModel->currentIndex();
 281     const bool trigger = currentIndex.isValid()
 282                          && (event->key() == Qt::Key_Return)
 283                          && (selModel->selectedIndexes().count() <= 1);
 284     if (trigger) {
 285         triggerItem(currentIndex);
 286     }
 287 }
 288
 289 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 290 {
 291     KCategorizedView::wheelEvent(event);
 292
 293     // if the icons are aligned left to right, the vertical wheel event should
 294     // be applied to the horizontal scrollbar
 295     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 296     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 297                                   (settings->arrangement() == QListView::LeftToRight);
 298     if (scrollHorizontal) {
 299         QWheelEvent horizEvent(event->pos(),
 300                                event->delta(),
 301                                event->buttons(),
 302                                event->modifiers(),
 303                                Qt::Horizontal);
 304         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 305     }
 306 }
 307
 308 void DolphinIconsView::triggerItem(const QModelIndex& index)
 309 {
 310     m_controller->triggerItem(itemForIndex(index));
 311 }
 312
 313 void DolphinIconsView::slotEntered(const QModelIndex& index)
 314 {
 315     m_controller->emitItemEntered(itemForIndex(index));
 316 }
 317
 318 void DolphinIconsView::slotShowPreviewChanged()
 319 {
 320     const DolphinView* view = m_controller->dolphinView();
 321     updateGridSize(view->showPreview(), additionalInfoCount());
 322 }
 323
 324 void DolphinIconsView::slotAdditionalInfoChanged()
 325 {
 326     const DolphinView* view = m_controller->dolphinView();
 327     const bool showPreview = view->showPreview();
 328     updateGridSize(showPreview, view->additionalInfo().count());
 329 }
 330
 331 void DolphinIconsView::zoomIn()
 332 {
 333     if (isZoomInPossible()) {
 334         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 335
 336         const int oldIconSize = settings->iconSize();
 337         int newIconSize = oldIconSize;
 338
 339         const bool showPreview = m_controller->dolphinView()->showPreview();
 340         if (showPreview) {
 341             const int previewSize = increasedIconSize(settings->previewSize());
 342             settings->setPreviewSize(previewSize);
 343         } else {
 344             newIconSize = increasedIconSize(oldIconSize);
 345             settings->setIconSize(newIconSize);
 346             if (settings->previewSize() < newIconSize) {
 347                 // assure that the preview size is always >= the icon size
 348                 settings->setPreviewSize(newIconSize);
 349             }
 350         }
 351
 352         // increase also the grid size
 353         const int diff = newIconSize - oldIconSize;
 354         settings->setItemWidth(settings->itemWidth() + diff);
 355         settings->setItemHeight(settings->itemHeight() + diff);
 356
 357         updateGridSize(showPreview, additionalInfoCount());
 358     }
 359 }
 360
 361 void DolphinIconsView::zoomOut()
 362 {
 363     if (isZoomOutPossible()) {
 364         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 365
 366         const int oldIconSize = settings->iconSize();
 367         int newIconSize = oldIconSize;
 368
 369         const bool showPreview = m_controller->dolphinView()->showPreview();
 370         if (showPreview) {
 371             const int previewSize = decreasedIconSize(settings->previewSize());
 372             settings->setPreviewSize(previewSize);
 373             if (settings->iconSize() > previewSize) {
 374                 // assure that the icon size is always <= the preview size
 375                 newIconSize = previewSize;
 376                 settings->setIconSize(newIconSize);
 377             }
 378         } else {
 379             newIconSize = decreasedIconSize(settings->iconSize());
 380             settings->setIconSize(newIconSize);
 381         }
 382
 383         // decrease also the grid size
 384         const int diff = oldIconSize - newIconSize;
 385         settings->setItemWidth(settings->itemWidth() - diff);
 386         settings->setItemHeight(settings->itemHeight() - diff);
 387
 388         updateGridSize(showPreview, additionalInfoCount());
 389     }
 390 }
 391
 392 bool DolphinIconsView::isZoomInPossible() const
 393 {
 394     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 395     const bool showPreview = m_controller->dolphinView()->showPreview();
 396     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 397     return size < KIconLoader::SizeEnormous;
 398 }
 399
 400 bool DolphinIconsView::isZoomOutPossible() const
 401 {
 402     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 403     const bool showPreview = m_controller->dolphinView()->showPreview();
 404     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 405     return size > KIconLoader::SizeSmall;
 406 }
 407
 408 int DolphinIconsView::increasedIconSize(int size) const
 409 {
 410     int incSize = 0;
 411     switch (size) {
 412     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 413     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 414     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 415     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 416     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 417     default: Q_ASSERT(false); break;
 418     }
 419     return incSize;
 420 }
 421
 422 int DolphinIconsView::decreasedIconSize(int size) const
 423 {
 424     int decSize = 0;
 425     switch (size) {
 426     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 427     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 428     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 429     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 430     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 431     default: Q_ASSERT(false); break;
 432     }
 433     return decSize;
 434 }
 435
 436 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 437 {
 438     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 439     Q_ASSERT(settings != 0);
 440
 441     int itemWidth = settings->itemWidth();
 442     int itemHeight = settings->itemHeight();
 443     int size = settings->iconSize();
 444
 445     if (showPreview) {
 446         const int previewSize = settings->previewSize();
 447         const int diff = previewSize - size;
 448         Q_ASSERT(diff >= 0);
 449         itemWidth  += diff;
 450         itemHeight += diff;
 451
 452         size = previewSize;
 453     }
 454     setIconSize(QSize(size, size));
 455
 456     Q_ASSERT(additionalInfoCount >= 0);
 457     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 458
 459     if (settings->arrangement() == QListView::TopToBottom) {
 460         // The decoration width indirectly defines the maximum
 461         // width for the text wrapping. To use the maximum item width
 462         // for text wrapping, it is used as decoration width.
 463         m_decorationSize = QSize(itemWidth, size);
 464     } else {
 465         m_decorationSize = QSize(size, size);
 466     }
 467
 468     m_itemSize = QSize(itemWidth, itemHeight);
 469
 470     const int spacing = settings->gridSpacing();
 471     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 472
 473     m_controller->setZoomInPossible(isZoomInPossible());
 474     m_controller->setZoomOutPossible(isZoomOutPossible());
 475 }
 476
 477 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 478 {
 479     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 480     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 481     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 482     return dirModel->itemForIndex(dirIndex);
 483 }
 484
 485 int DolphinIconsView::additionalInfoCount() const
 486 {
 487     const DolphinView* view = m_controller->dolphinView();
 488     return view->additionalInfo().count();
 489 }
 490
 491 #include "dolphiniconsview.moc"