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     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 146     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 147         // TODO: QListView::visualRect() calculates a wrong position of the items under
 148         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 149         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 150         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 151         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 152         const int margin = settings->gridSpacing();
 153         const int gridWidth = gridSize().width();
 154         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 155         itemRect.moveLeft(gridIndex * gridWidth + margin);
 156     }
 157
 158     return itemRect;
 159 }
 160
 161 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 162 {
 163     return m_viewOptions;
 164 }
 165
 166 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 167 {
 168     KCategorizedView::contextMenuEvent(event);
 169     m_controller->triggerContextMenuRequest(event->pos());
 170 }
 171
 172 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 173 {
 174     m_controller->requestActivation();
 175     if (!indexAt(event->pos()).isValid()) {
 176         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 177         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 178             clearSelection();
 179         }
 180     }
 181
 182     KCategorizedView::mousePressEvent(event);
 183 }
 184
 185 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 186 {
 187     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 188     // fix this in KDE 4.1
 189     KCategorizedView::startDrag(supportedActions);
 190     DragAndDropHelper::startDrag(this, supportedActions);
 191 }
 192
 193 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 194 {
 195     if (event->mimeData()->hasUrls()) {
 196         event->acceptProposedAction();
 197     }
 198     m_dragging = true;
 199 }
 200
 201 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 202 {
 203     KCategorizedView::dragLeaveEvent(event);
 204
 205     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 206     m_dragging = false;
 207     setDirtyRegion(m_dropRect);
 208 }
 209
 210 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 211 {
 212     KCategorizedView::dragMoveEvent(event);
 213
 214     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 215     const QModelIndex index = indexAt(event->pos());
 216     setDirtyRegion(m_dropRect);
 217     if (itemForIndex(index).isDir()) {
 218         m_dropRect = visualRect(index);
 219     } else {
 220         m_dropRect.setSize(QSize()); // set as invalid
 221     }
 222     setDirtyRegion(m_dropRect);
 223 }
 224
 225 void DolphinIconsView::dropEvent(QDropEvent* event)
 226 {
 227     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 228         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 229         if (!urls.isEmpty()) {
 230             const QModelIndex index = indexAt(event->pos());
 231             const KFileItem item = itemForIndex(index);
 232             m_controller->indicateDroppedUrls(urls,
 233                                               m_controller->url(),
 234                                               item);
 235             event->acceptProposedAction();
 236         }
 237     }
 238
 239     KCategorizedView::dropEvent(event);
 240
 241     m_dragging = false;
 242 }
 243
 244 void DolphinIconsView::paintEvent(QPaintEvent* event)
 245 {
 246     KCategorizedView::paintEvent(event);
 247
 248     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 249     if (m_dragging) {
 250         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 251         DragAndDropHelper::drawHoverIndication(viewport(), m_dropRect, brush);
 252     }
 253 }
 254
 255 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 256 {
 257     KCategorizedView::keyPressEvent(event);
 258
 259     const QItemSelectionModel* selModel = selectionModel();
 260     const QModelIndex currentIndex = selModel->currentIndex();
 261     const bool trigger = currentIndex.isValid()
 262                          && (event->key() == Qt::Key_Return)
 263                          && (selModel->selectedIndexes().count() <= 1);
 264     if (trigger) {
 265         triggerItem(currentIndex);
 266     }
 267 }
 268
 269 void DolphinIconsView::triggerItem(const QModelIndex& index)
 270 {
 271     m_controller->triggerItem(itemForIndex(index));
 272 }
 273
 274 void DolphinIconsView::slotEntered(const QModelIndex& index)
 275 {
 276     m_controller->emitItemEntered(itemForIndex(index));
 277 }
 278
 279 void DolphinIconsView::slotShowPreviewChanged()
 280 {
 281     const DolphinView* view = m_controller->dolphinView();
 282     const int infoCount = view->additionalInfo().count();
 283     updateGridSize(view->showPreview(), infoCount);
 284 }
 285
 286 void DolphinIconsView::slotAdditionalInfoChanged(const KFileItemDelegate::InformationList& info)
 287 {
 288     const bool showPreview = m_controller->dolphinView()->showPreview();
 289     updateGridSize(showPreview, info.count());
 290 }
 291
 292 void DolphinIconsView::zoomIn()
 293 {
 294     if (isZoomInPossible()) {
 295         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 296
 297         const int oldIconSize = settings->iconSize();
 298         int newIconSize = oldIconSize;
 299
 300         const bool showPreview = m_controller->dolphinView()->showPreview();
 301         if (showPreview) {
 302             const int previewSize = increasedIconSize(settings->previewSize());
 303             settings->setPreviewSize(previewSize);
 304         } else {
 305             newIconSize = increasedIconSize(oldIconSize);
 306             settings->setIconSize(newIconSize);
 307             if (settings->previewSize() < newIconSize) {
 308                 // assure that the preview size is always >= the icon size
 309                 settings->setPreviewSize(newIconSize);
 310             }
 311         }
 312
 313         // increase also the grid size
 314         const int diff = newIconSize - oldIconSize;
 315         settings->setItemWidth(settings->itemWidth() + diff);
 316         settings->setItemHeight(settings->itemHeight() + diff);
 317
 318         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 319         updateGridSize(showPreview, infoCount);
 320     }
 321 }
 322
 323 void DolphinIconsView::zoomOut()
 324 {
 325     if (isZoomOutPossible()) {
 326         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 327
 328         const int oldIconSize = settings->iconSize();
 329         int newIconSize = oldIconSize;
 330
 331         const bool showPreview = m_controller->dolphinView()->showPreview();
 332         if (showPreview) {
 333             const int previewSize = decreasedIconSize(settings->previewSize());
 334             settings->setPreviewSize(previewSize);
 335             if (settings->iconSize() > previewSize) {
 336                 // assure that the icon size is always <= the preview size
 337                 newIconSize = previewSize;
 338                 settings->setIconSize(newIconSize);
 339             }
 340         } else {
 341             newIconSize = decreasedIconSize(settings->iconSize());
 342             settings->setIconSize(newIconSize);
 343         }
 344
 345         // decrease also the grid size
 346         const int diff = oldIconSize - newIconSize;
 347         settings->setItemWidth(settings->itemWidth() - diff);
 348         settings->setItemHeight(settings->itemHeight() - diff);
 349
 350         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 351         updateGridSize(showPreview, infoCount);
 352     }
 353 }
 354
 355 bool DolphinIconsView::isZoomInPossible() const
 356 {
 357     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 358     const bool showPreview = m_controller->dolphinView()->showPreview();
 359     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 360     return size < KIconLoader::SizeEnormous;
 361 }
 362
 363 bool DolphinIconsView::isZoomOutPossible() const
 364 {
 365     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 366     const bool showPreview = m_controller->dolphinView()->showPreview();
 367     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 368     return size > KIconLoader::SizeSmall;
 369 }
 370
 371 int DolphinIconsView::increasedIconSize(int size) const
 372 {
 373     int incSize = 0;
 374     switch (size) {
 375     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 376     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 377     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 378     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 379     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 380     default: Q_ASSERT(false); break;
 381     }
 382     return incSize;
 383 }
 384
 385 int DolphinIconsView::decreasedIconSize(int size) const
 386 {
 387     int decSize = 0;
 388     switch (size) {
 389     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 390     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 391     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 392     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 393     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 394     default: Q_ASSERT(false); break;
 395     }
 396     return decSize;
 397 }
 398
 399 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 400 {
 401     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 402     Q_ASSERT(settings != 0);
 403
 404     int itemWidth = settings->itemWidth();
 405     int itemHeight = settings->itemHeight();
 406     int size = settings->iconSize();
 407
 408     if (showPreview) {
 409         const int previewSize = settings->previewSize();
 410         const int diff = previewSize - size;
 411         Q_ASSERT(diff >= 0);
 412         itemWidth  += diff;
 413         itemHeight += diff;
 414
 415         size = previewSize;
 416     }
 417
 418     Q_ASSERT(additionalInfoCount >= 0);
 419     itemHeight += additionalInfoCount * m_viewOptions.font.pointSize() * 2;
 420
 421     if (settings->arrangement() == QListView::TopToBottom) {
 422         // The decoration width indirectly defines the maximum
 423         // width for the text wrapping. To use the maximum item width
 424         // for text wrapping, it is used as decoration width.
 425         m_viewOptions.decorationSize = QSize(itemWidth, size);
 426     } else {
 427         m_viewOptions.decorationSize = QSize(size, size);
 428     }
 429
 430     const int spacing = settings->gridSpacing();
 431     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 432
 433     m_itemSize = QSize(itemWidth, itemHeight);
 434
 435     m_controller->setZoomInPossible(isZoomInPossible());
 436     m_controller->setZoomOutPossible(isZoomOutPossible());
 437 }
 438
 439 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 440 {
 441     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 442     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 443     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 444     return dirModel->itemForIndex(dirIndex);
 445 }
 446
 447 #include "dolphiniconsview.moc"