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     setEditTriggers(QAbstractItemView::NoEditTriggers);
  59     viewport()->setAcceptDrops(true);
  60
  61     setMouseTracking(true);
  62
  63     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  64     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  65     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  66     // RETURN-key in keyPressEvent().
  67     if (KGlobalSettings::singleClick()) {
  68         connect(this, SIGNAL(clicked(const QModelIndex&)),
  69                 controller, SLOT(triggerItem(const QModelIndex&)));
  70         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  71             SelectionManager* selManager = new SelectionManager(this);
  72             connect(selManager, SIGNAL(selectionChanged()),
  73                     this, SLOT(requestActivation()));
  74             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  75                     selManager, SLOT(reset()));
  76         }
  77     } else {
  78         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  79                 controller, SLOT(triggerItem(const QModelIndex&)));
  80     }
  81     connect(this, SIGNAL(entered(const QModelIndex&)),
  82             controller, SLOT(emitItemEntered(const QModelIndex&)));
  83     connect(this, SIGNAL(viewportEntered()),
  84             controller, SLOT(emitViewportEntered()));
  85     connect(controller, SIGNAL(zoomIn()),
  86             this, SLOT(zoomIn()));
  87     connect(controller, SIGNAL(zoomOut()),
  88             this, SLOT(zoomOut()));
  89
  90     const DolphinView* view = controller->dolphinView();
  91     connect(view, SIGNAL(showPreviewChanged()),
  92             this, SLOT(slotShowPreviewChanged()));
  93     connect(view, SIGNAL(additionalInfoChanged()),
  94             this, SLOT(slotAdditionalInfoChanged()));
  95
  96     // apply the icons mode settings to the widget
  97     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  98     Q_ASSERT(settings != 0);
  99
 100     if (settings->useSystemFont()) {
 101         m_font = KGlobalSettings::generalFont();
 102     } else {
 103         m_font = QFont(settings->fontFamily(),
 104                        settings->fontSize(),
 105                        settings->fontWeight(),
 106                        settings->italicFont());
 107     }
 108
 109     setWordWrap(settings->numberOfTextlines() > 1);
 110     updateGridSize(view->showPreview(), 0);
 111
 112     if (settings->arrangement() == QListView::TopToBottom) {
 113         setFlow(QListView::LeftToRight);
 114         m_decorationPosition = QStyleOptionViewItem::Top;
 115         m_displayAlignment = Qt::AlignHCenter;
 116     } else {
 117         setFlow(QListView::TopToBottom);
 118         m_decorationPosition = QStyleOptionViewItem::Left;
 119         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 120     }
 121
 122     m_categoryDrawer = new DolphinCategoryDrawer();
 123     setCategoryDrawer(m_categoryDrawer);
 124
 125     setFocus();
 126
 127     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 128             this, SLOT(updateFont()));
 129 }
 130
 131 DolphinIconsView::~DolphinIconsView()
 132 {
 133     delete m_categoryDrawer;
 134     m_categoryDrawer = 0;
 135 }
 136
 137 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 138 {
 139     KCategorizedView::dataChanged(topLeft, bottomRight);
 140
 141     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 142     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 143         // bypass a QListView issue that items are not layout correctly if the decoration size of
 144         // an index changes
 145         scheduleDelayedItemsLayout();
 146     }
 147 }
 148
 149 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 150 {
 151     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 152     viewOptions.font = m_font;
 153     viewOptions.decorationPosition = m_decorationPosition;
 154     viewOptions.decorationSize = m_decorationSize;
 155     viewOptions.displayAlignment = m_displayAlignment;
 156     viewOptions.showDecorationSelected = true;
 157     return viewOptions;
 158 }
 159
 160 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 161 {
 162     KCategorizedView::contextMenuEvent(event);
 163     m_controller->triggerContextMenuRequest(event->pos());
 164 }
 165
 166 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 167 {
 168     m_controller->requestActivation();
 169     if (!indexAt(event->pos()).isValid()) {
 170         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 171         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 172             clearSelection();
 173         }
 174     }
 175
 176     KCategorizedView::mousePressEvent(event);
 177 }
 178
 179 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 180 {
 181     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 182     // fix this in KDE 4.1
 183     KCategorizedView::startDrag(supportedActions);
 184     DragAndDropHelper::startDrag(this, supportedActions);
 185 }
 186
 187 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 188 {
 189     if (event->mimeData()->hasUrls()) {
 190         event->acceptProposedAction();
 191     }
 192 }
 193
 194 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 195 {
 196     KCategorizedView::dragLeaveEvent(event);
 197     setDirtyRegion(m_dropRect);
 198 }
 199
 200 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 201 {
 202     KCategorizedView::dragMoveEvent(event);
 203
 204     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 205     const QModelIndex index = indexAt(event->pos());
 206     setDirtyRegion(m_dropRect);
 207
 208     m_dropRect.setSize(QSize()); // set as invalid
 209     if (index.isValid()) {
 210         const KFileItem item = m_controller->itemForIndex(index);
 211         if (!item.isNull() && item.isDir()) {
 212             m_dropRect = visualRect(index);
 213         } else {
 214             m_dropRect.setSize(QSize()); // set as invalid
 215         }
 216     }
 217     if (event->mimeData()->hasUrls()) {
 218         // accept url drops, independently from the destination item
 219         event->acceptProposedAction();
 220     }
 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 = m_controller->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
 242 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 243 {
 244     KCategorizedView::keyPressEvent(event);
 245     m_controller->handleKeyPressEvent(event);
 246 }
 247
 248 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 249 {
 250     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 251     if (event->modifiers() & Qt::ControlModifier) {
 252         event->ignore();
 253         return;
 254     }
 255     KCategorizedView::wheelEvent(event);
 256     // if the icons are aligned left to right, the vertical wheel event should
 257     // be applied to the horizontal scrollbar
 258     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 259     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 260                                   (settings->arrangement() == QListView::LeftToRight);
 261     if (scrollHorizontal) {
 262         QWheelEvent horizEvent(event->pos(),
 263                                event->delta(),
 264                                event->buttons(),
 265                                event->modifiers(),
 266                                Qt::Horizontal);
 267         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 268     }
 269 }
 270
 271 void DolphinIconsView::showEvent(QShowEvent* event)
 272 {
 273     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 274     delegate->setMaximumSize(m_itemSize);
 275
 276     KCategorizedView::showEvent(event);
 277 }
 278
 279 void DolphinIconsView::slotShowPreviewChanged()
 280 {
 281     const DolphinView* view = m_controller->dolphinView();
 282     updateGridSize(view->showPreview(), additionalInfoCount());
 283 }
 284
 285 void DolphinIconsView::slotAdditionalInfoChanged()
 286 {
 287     const DolphinView* view = m_controller->dolphinView();
 288     const bool showPreview = view->showPreview();
 289     updateGridSize(showPreview, view->additionalInfo().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         }
 308
 309         // increase also the grid size
 310         const int diff = newIconSize - oldIconSize;
 311         settings->setItemWidth(settings->itemWidth() + diff);
 312         settings->setItemHeight(settings->itemHeight() + diff);
 313
 314         updateGridSize(showPreview, additionalInfoCount());
 315     }
 316 }
 317
 318 void DolphinIconsView::zoomOut()
 319 {
 320     if (isZoomOutPossible()) {
 321         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 322
 323         const int oldIconSize = settings->iconSize();
 324         int newIconSize = oldIconSize;
 325
 326         const bool showPreview = m_controller->dolphinView()->showPreview();
 327         if (showPreview) {
 328             const int previewSize = decreasedIconSize(settings->previewSize());
 329             settings->setPreviewSize(previewSize);
 330         } else {
 331             newIconSize = decreasedIconSize(settings->iconSize());
 332             settings->setIconSize(newIconSize);
 333         }
 334
 335         // decrease also the grid size
 336         const int diff = oldIconSize - newIconSize;
 337         settings->setItemWidth(settings->itemWidth() - diff);
 338         settings->setItemHeight(settings->itemHeight() - diff);
 339
 340         updateGridSize(showPreview, additionalInfoCount());
 341     }
 342 }
 343
 344 void DolphinIconsView::requestActivation()
 345 {
 346     m_controller->requestActivation();
 347 }
 348
 349 void DolphinIconsView::updateFont()
 350 {
 351     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 352     Q_ASSERT(settings != 0);
 353
 354     if (settings->useSystemFont()) {
 355         m_font = KGlobalSettings::generalFont();
 356     }
 357 }
 358
 359 bool DolphinIconsView::isZoomInPossible() const
 360 {
 361     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 362     const bool showPreview = m_controller->dolphinView()->showPreview();
 363     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 364     return size < KIconLoader::SizeEnormous;
 365 }
 366
 367 bool DolphinIconsView::isZoomOutPossible() const
 368 {
 369     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 370     const bool showPreview = m_controller->dolphinView()->showPreview();
 371     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 372     return size > KIconLoader::SizeSmall;
 373 }
 374
 375 int DolphinIconsView::increasedIconSize(int size) const
 376 {
 377     int incSize = 0;
 378     switch (size) {
 379     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 380     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 381     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 382     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 383     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 384     default: Q_ASSERT(false); break;
 385     }
 386     return incSize;
 387 }
 388
 389 int DolphinIconsView::decreasedIconSize(int size) const
 390 {
 391     int decSize = 0;
 392     switch (size) {
 393     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 394     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 395     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 396     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 397     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 398     default: Q_ASSERT(false); break;
 399     }
 400     return decSize;
 401 }
 402
 403 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 404 {
 405     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 406     Q_ASSERT(settings != 0);
 407
 408     int itemWidth = settings->itemWidth();
 409     int itemHeight = settings->itemHeight();
 410     int size = settings->iconSize();
 411
 412     if (showPreview) {
 413         const int previewSize = settings->previewSize();
 414         const int diff = previewSize - size;
 415         itemWidth  += diff;
 416         itemHeight += diff;
 417
 418         size = previewSize;
 419     }
 420
 421     Q_ASSERT(additionalInfoCount >= 0);
 422     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 423
 424     if (settings->arrangement() == QListView::TopToBottom) {
 425         // The decoration width indirectly defines the maximum
 426         // width for the text wrapping. To use the maximum item width
 427         // for text wrapping, it is used as decoration width.
 428         m_decorationSize = QSize(itemWidth, size);
 429         setIconSize(QSize(itemWidth, size));
 430     } else {
 431         m_decorationSize = QSize(size, size);
 432         setIconSize(QSize(size, size));
 433     }
 434
 435     m_itemSize = QSize(itemWidth, itemHeight);
 436
 437     const int spacing = settings->gridSpacing();
 438     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 439
 440     m_controller->setZoomInPossible(isZoomInPossible());
 441     m_controller->setZoomOutPossible(isZoomOutPossible());
 442
 443     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 444     if (delegate != 0) {
 445         delegate->setMaximumSize(m_itemSize);
 446     }
 447 }
 448
 449 int DolphinIconsView::additionalInfoCount() const
 450 {
 451     const DolphinView* view = m_controller->dolphinView();
 452     return view->additionalInfo().count();
 453 }
 454
 455 #include "dolphiniconsview.moc"