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 "dolphin_generalsettings.h"
  27 #include "draganddrophelper.h"
  28 #include "selectionmanager.h"
  29
  30 #include <kcategorizedsortfilterproxymodel.h>
  31 #include <kdialog.h>
  32 #include <kdirmodel.h>
  33 #include <kfileitemdelegate.h>
  34
  35 #include <QAbstractProxyModel>
  36 #include <QApplication>
  37 #include <QPainter>
  38 #include <QPoint>
  39 #include <QScrollBar>
  40
  41 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  42     KCategorizedView(parent),
  43     m_controller(controller),
  44     m_categoryDrawer(0),
  45     m_font(),
  46     m_decorationSize(),
  47     m_decorationPosition(QStyleOptionViewItem::Top),
  48     m_displayAlignment(Qt::AlignHCenter),
  49     m_itemSize(),
  50     m_dropRect()
  51 {
  52     Q_ASSERT(controller != 0);
  53     setViewMode(QListView::IconMode);
  54     setResizeMode(QListView::Adjust);
  55     setSpacing(KDialog::spacingHint());
  56     setMovement(QListView::Static);
  57     setDragEnabled(true);
  58     viewport()->setAcceptDrops(true);
  59
  60     setMouseTracking(true);
  61
  62     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  63     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  64     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  65     // RETURN-key in keyPressEvent().
  66     if (KGlobalSettings::singleClick()) {
  67         connect(this, SIGNAL(clicked(const QModelIndex&)),
  68                 controller, SLOT(triggerItem(const QModelIndex&)));
  69         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  70             SelectionManager* selManager = new SelectionManager(this);
  71             connect(selManager, SIGNAL(selectionChanged()),
  72                     this, SLOT(requestActivation()));
  73             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  74                     selManager, SLOT(reset()));
  75         }
  76     } else {
  77         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  78                 controller, SLOT(triggerItem(const QModelIndex&)));
  79     }
  80     connect(this, SIGNAL(entered(const QModelIndex&)),
  81             controller, SLOT(emitItemEntered(const QModelIndex&)));
  82     connect(this, SIGNAL(viewportEntered()),
  83             controller, SLOT(emitViewportEntered()));
  84     connect(controller, SIGNAL(zoomIn()),
  85             this, SLOT(zoomIn()));
  86     connect(controller, SIGNAL(zoomOut()),
  87             this, SLOT(zoomOut()));
  88
  89     const DolphinView* view = controller->dolphinView();
  90     connect(view, SIGNAL(showPreviewChanged()),
  91             this, SLOT(slotShowPreviewChanged()));
  92     connect(view, SIGNAL(additionalInfoChanged()),
  93             this, SLOT(slotAdditionalInfoChanged()));
  94
  95     // apply the icons mode settings to the widget
  96     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  97     Q_ASSERT(settings != 0);
  98
  99     if (settings->useSystemFont()) {
 100         m_font = KGlobalSettings::generalFont();
 101     } else {
 102         m_font = QFont(settings->fontFamily(),
 103                        settings->fontSize(),
 104                        settings->fontWeight(),
 105                        settings->italicFont());
 106     }
 107
 108     setWordWrap(settings->numberOfTextlines() > 1);
 109     updateGridSize(view->showPreview(), 0);
 110
 111     if (settings->arrangement() == QListView::TopToBottom) {
 112         setFlow(QListView::LeftToRight);
 113         m_decorationPosition = QStyleOptionViewItem::Top;
 114         m_displayAlignment = Qt::AlignHCenter;
 115     } else {
 116         setFlow(QListView::TopToBottom);
 117         m_decorationPosition = QStyleOptionViewItem::Left;
 118         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 119     }
 120
 121     m_categoryDrawer = new DolphinCategoryDrawer();
 122     setCategoryDrawer(m_categoryDrawer);
 123
 124     setFocus();
 125
 126     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 127             this, SLOT(updateFont()));
 128 }
 129
 130 DolphinIconsView::~DolphinIconsView()
 131 {
 132     delete m_categoryDrawer;
 133     m_categoryDrawer = 0;
 134 }
 135
 136 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 137 {
 138     QRect itemRect = KCategorizedView::visualRect(index);
 139
 140     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 141     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 142         // TODO: QListView might return a wrong x-position if the decoration size decreases. This is bypassed
 143         // by the following workaround...
 144         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 145         const int margin = settings->gridSpacing();
 146         const int gridWidth = gridSize().width();
 147         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 148         const int centerInc = (m_itemSize.width() - itemRect.width()) / 2;
 149         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 150     }
 151
 152     return itemRect;
 153 }
 154
 155 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 156 {
 157     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 158     viewOptions.font = m_font;
 159     viewOptions.decorationPosition = m_decorationPosition;
 160     viewOptions.decorationSize = m_decorationSize;
 161     viewOptions.displayAlignment = m_displayAlignment;
 162     viewOptions.showDecorationSelected = true;
 163     return 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 }
 199
 200 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 201 {
 202     KCategorizedView::dragLeaveEvent(event);
 203     setDirtyRegion(m_dropRect);
 204 }
 205
 206 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 207 {
 208     KCategorizedView::dragMoveEvent(event);
 209
 210     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 211     const QModelIndex index = indexAt(event->pos());
 212     setDirtyRegion(m_dropRect);
 213
 214     m_dropRect.setSize(QSize()); // set as invalid
 215     if (index.isValid()) {
 216         const KFileItem item = m_controller->itemForIndex(index);
 217         if (!item.isNull() && item.isDir()) {
 218             m_dropRect = visualRect(index);
 219         } else {
 220             m_dropRect.setSize(QSize()); // set as invalid
 221         }
 222     }
 223     if (event->mimeData()->hasUrls()) {
 224         // accept url drops, independently from the destination item
 225         event->acceptProposedAction();
 226     }
 227
 228     setDirtyRegion(m_dropRect);
 229 }
 230
 231 void DolphinIconsView::dropEvent(QDropEvent* event)
 232 {
 233     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 234         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 235         if (!urls.isEmpty()) {
 236             const QModelIndex index = indexAt(event->pos());
 237             const KFileItem item = m_controller->itemForIndex(index);
 238             m_controller->indicateDroppedUrls(urls,
 239                                               m_controller->url(),
 240                                               item);
 241             event->acceptProposedAction();
 242         }
 243     }
 244
 245     KCategorizedView::dropEvent(event);
 246 }
 247
 248 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 249 {
 250     KCategorizedView::keyPressEvent(event);
 251     m_controller->handleKeyPressEvent(event);
 252 }
 253
 254 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 255 {
 256     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 257     if (event->modifiers() & Qt::ControlModifier) {
 258         event->ignore();
 259         return;
 260     }
 261     KCategorizedView::wheelEvent(event);
 262     // if the icons are aligned left to right, the vertical wheel event should
 263     // be applied to the horizontal scrollbar
 264     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 265     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 266                                   (settings->arrangement() == QListView::LeftToRight);
 267     if (scrollHorizontal) {
 268         QWheelEvent horizEvent(event->pos(),
 269                                event->delta(),
 270                                event->buttons(),
 271                                event->modifiers(),
 272                                Qt::Horizontal);
 273         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 274     }
 275 }
 276
 277 void DolphinIconsView::showEvent(QShowEvent* event)
 278 {
 279     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 280     delegate->setMaximumSize(m_itemSize);
 281
 282     KCategorizedView::showEvent(event);
 283 }
 284
 285 void DolphinIconsView::slotShowPreviewChanged()
 286 {
 287     const DolphinView* view = m_controller->dolphinView();
 288     updateGridSize(view->showPreview(), additionalInfoCount());
 289 }
 290
 291 void DolphinIconsView::slotAdditionalInfoChanged()
 292 {
 293     const DolphinView* view = m_controller->dolphinView();
 294     const bool showPreview = view->showPreview();
 295     updateGridSize(showPreview, view->additionalInfo().count());
 296 }
 297
 298 void DolphinIconsView::zoomIn()
 299 {
 300     if (isZoomInPossible()) {
 301         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 302
 303         const int oldIconSize = settings->iconSize();
 304         int newIconSize = oldIconSize;
 305
 306         const bool showPreview = m_controller->dolphinView()->showPreview();
 307         if (showPreview) {
 308             const int previewSize = increasedIconSize(settings->previewSize());
 309             settings->setPreviewSize(previewSize);
 310         } else {
 311             newIconSize = increasedIconSize(oldIconSize);
 312             settings->setIconSize(newIconSize);
 313         }
 314
 315         // increase also the grid size
 316         const int diff = newIconSize - oldIconSize;
 317         settings->setItemWidth(settings->itemWidth() + diff);
 318         settings->setItemHeight(settings->itemHeight() + diff);
 319
 320         updateGridSize(showPreview, additionalInfoCount());
 321     }
 322 }
 323
 324 void DolphinIconsView::zoomOut()
 325 {
 326     if (isZoomOutPossible()) {
 327         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 328
 329         const int oldIconSize = settings->iconSize();
 330         int newIconSize = oldIconSize;
 331
 332         const bool showPreview = m_controller->dolphinView()->showPreview();
 333         if (showPreview) {
 334             const int previewSize = decreasedIconSize(settings->previewSize());
 335             settings->setPreviewSize(previewSize);
 336         } else {
 337             newIconSize = decreasedIconSize(settings->iconSize());
 338             settings->setIconSize(newIconSize);
 339         }
 340
 341         // decrease also the grid size
 342         const int diff = oldIconSize - newIconSize;
 343         settings->setItemWidth(settings->itemWidth() - diff);
 344         settings->setItemHeight(settings->itemHeight() - diff);
 345
 346         updateGridSize(showPreview, additionalInfoCount());
 347     }
 348 }
 349
 350 void DolphinIconsView::requestActivation()
 351 {
 352     m_controller->requestActivation();
 353 }
 354
 355 void DolphinIconsView::updateFont()
 356 {
 357     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 358     Q_ASSERT(settings != 0);
 359
 360     if (settings->useSystemFont()) {
 361         m_font = KGlobalSettings::generalFont();
 362     }
 363 }
 364
 365 bool DolphinIconsView::isZoomInPossible() const
 366 {
 367     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 368     const bool showPreview = m_controller->dolphinView()->showPreview();
 369     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 370     return size < KIconLoader::SizeEnormous;
 371 }
 372
 373 bool DolphinIconsView::isZoomOutPossible() const
 374 {
 375     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 376     const bool showPreview = m_controller->dolphinView()->showPreview();
 377     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 378     return size > KIconLoader::SizeSmall;
 379 }
 380
 381 int DolphinIconsView::increasedIconSize(int size) const
 382 {
 383     int incSize = 0;
 384     switch (size) {
 385     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 386     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 387     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 388     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 389     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 390     default: Q_ASSERT(false); break;
 391     }
 392     return incSize;
 393 }
 394
 395 int DolphinIconsView::decreasedIconSize(int size) const
 396 {
 397     int decSize = 0;
 398     switch (size) {
 399     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 400     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 401     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 402     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 403     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 404     default: Q_ASSERT(false); break;
 405     }
 406     return decSize;
 407 }
 408
 409 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 410 {
 411     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 412     Q_ASSERT(settings != 0);
 413
 414     int itemWidth = settings->itemWidth();
 415     int itemHeight = settings->itemHeight();
 416     int size = settings->iconSize();
 417
 418     if (showPreview) {
 419         const int previewSize = settings->previewSize();
 420         const int diff = previewSize - size;
 421         itemWidth  += diff;
 422         itemHeight += diff;
 423
 424         size = previewSize;
 425     }
 426
 427     Q_ASSERT(additionalInfoCount >= 0);
 428     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 429
 430     if (settings->arrangement() == QListView::TopToBottom) {
 431         // The decoration width indirectly defines the maximum
 432         // width for the text wrapping. To use the maximum item width
 433         // for text wrapping, it is used as decoration width.
 434         m_decorationSize = QSize(itemWidth, size);
 435         setIconSize(QSize(itemWidth, size));
 436     } else {
 437         m_decorationSize = QSize(size, size);
 438         setIconSize(QSize(size, size));
 439     }
 440
 441     m_itemSize = QSize(itemWidth, itemHeight);
 442
 443     const int spacing = settings->gridSpacing();
 444     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 445
 446     m_controller->setZoomInPossible(isZoomInPossible());
 447     m_controller->setZoomOutPossible(isZoomOutPossible());
 448
 449     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 450     if (delegate != 0) {
 451         delegate->setMaximumSize(m_itemSize);
 452     }
 453 }
 454
 455 int DolphinIconsView::additionalInfoCount() const
 456 {
 457     const DolphinView* view = m_controller->dolphinView();
 458     return view->additionalInfo().count();
 459 }
 460
 461 #include "dolphiniconsview.moc"