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