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