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 "dolphinfileitemdelegate.h"
  25 #include "dolphinsettings.h"
  26 #include "dolphin_iconsmodesettings.h"
  27 #include "dolphin_generalsettings.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30
  31 #include <kcategorizedsortfilterproxymodel.h>
  32 #include <kdialog.h>
  33 #include <kdirmodel.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 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 137 {
 138     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 139     viewOptions.font = m_font;
 140     viewOptions.decorationPosition = m_decorationPosition;
 141     viewOptions.decorationSize = m_decorationSize;
 142     viewOptions.displayAlignment = m_displayAlignment;
 143     viewOptions.showDecorationSelected = true;
 144     return viewOptions;
 145 }
 146
 147 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 148 {
 149     KCategorizedView::contextMenuEvent(event);
 150     m_controller->triggerContextMenuRequest(event->pos());
 151 }
 152
 153 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 154 {
 155     m_controller->requestActivation();
 156     if (!indexAt(event->pos()).isValid()) {
 157         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 158         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 159             clearSelection();
 160         }
 161     }
 162
 163     KCategorizedView::mousePressEvent(event);
 164 }
 165
 166 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 167 {
 168     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 169     // fix this in KDE 4.1
 170     KCategorizedView::startDrag(supportedActions);
 171     DragAndDropHelper::startDrag(this, supportedActions);
 172 }
 173
 174 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 175 {
 176     if (event->mimeData()->hasUrls()) {
 177         event->acceptProposedAction();
 178     }
 179 }
 180
 181 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 182 {
 183     KCategorizedView::dragLeaveEvent(event);
 184     setDirtyRegion(m_dropRect);
 185 }
 186
 187 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 188 {
 189     KCategorizedView::dragMoveEvent(event);
 190
 191     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 192     const QModelIndex index = indexAt(event->pos());
 193     setDirtyRegion(m_dropRect);
 194
 195     m_dropRect.setSize(QSize()); // set as invalid
 196     if (index.isValid()) {
 197         const KFileItem item = m_controller->itemForIndex(index);
 198         if (!item.isNull() && item.isDir()) {
 199             m_dropRect = visualRect(index);
 200         } else {
 201             m_dropRect.setSize(QSize()); // set as invalid
 202         }
 203     }
 204     if (event->mimeData()->hasUrls()) {
 205         // accept url drops, independently from the destination item
 206         event->acceptProposedAction();
 207     }
 208
 209     setDirtyRegion(m_dropRect);
 210 }
 211
 212 void DolphinIconsView::dropEvent(QDropEvent* event)
 213 {
 214     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 215         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 216         if (!urls.isEmpty()) {
 217             const QModelIndex index = indexAt(event->pos());
 218             const KFileItem item = m_controller->itemForIndex(index);
 219             m_controller->indicateDroppedUrls(urls,
 220                                               m_controller->url(),
 221                                               item);
 222             event->acceptProposedAction();
 223         }
 224     }
 225
 226     KCategorizedView::dropEvent(event);
 227 }
 228
 229 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 230 {
 231     KCategorizedView::keyPressEvent(event);
 232     m_controller->handleKeyPressEvent(event);
 233 }
 234
 235 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 236 {
 237     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 238     if (event->modifiers() & Qt::ControlModifier) {
 239         event->ignore();
 240         return;
 241     }
 242     KCategorizedView::wheelEvent(event);
 243     // if the icons are aligned left to right, the vertical wheel event should
 244     // be applied to the horizontal scrollbar
 245     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 246     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 247                                   (settings->arrangement() == QListView::LeftToRight);
 248     if (scrollHorizontal) {
 249         QWheelEvent horizEvent(event->pos(),
 250                                event->delta(),
 251                                event->buttons(),
 252                                event->modifiers(),
 253                                Qt::Horizontal);
 254         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 255     }
 256 }
 257
 258 void DolphinIconsView::showEvent(QShowEvent* event)
 259 {
 260     Q_ASSERT(qobject_cast<DolphinFileItemDelegate*>(itemDelegate()) != 0);
 261     DolphinFileItemDelegate* delegate = static_cast<DolphinFileItemDelegate*>(itemDelegate());
 262     delegate->setMaximumSize(m_itemSize);
 263
 264     KCategorizedView::showEvent(event);
 265 }
 266
 267 void DolphinIconsView::slotShowPreviewChanged()
 268 {
 269     const DolphinView* view = m_controller->dolphinView();
 270     updateGridSize(view->showPreview(), additionalInfoCount());
 271 }
 272
 273 void DolphinIconsView::slotAdditionalInfoChanged()
 274 {
 275     const DolphinView* view = m_controller->dolphinView();
 276     const bool showPreview = view->showPreview();
 277     updateGridSize(showPreview, view->additionalInfo().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         }
 296
 297         // increase also the grid size
 298         const int diff = newIconSize - oldIconSize;
 299         settings->setItemWidth(settings->itemWidth() + diff);
 300         settings->setItemHeight(settings->itemHeight() + diff);
 301
 302         updateGridSize(showPreview, additionalInfoCount());
 303     }
 304 }
 305
 306 void DolphinIconsView::zoomOut()
 307 {
 308     if (isZoomOutPossible()) {
 309         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 310
 311         const int oldIconSize = settings->iconSize();
 312         int newIconSize = oldIconSize;
 313
 314         const bool showPreview = m_controller->dolphinView()->showPreview();
 315         if (showPreview) {
 316             const int previewSize = decreasedIconSize(settings->previewSize());
 317             settings->setPreviewSize(previewSize);
 318         } else {
 319             newIconSize = decreasedIconSize(settings->iconSize());
 320             settings->setIconSize(newIconSize);
 321         }
 322
 323         // decrease also the grid size
 324         const int diff = oldIconSize - newIconSize;
 325         settings->setItemWidth(settings->itemWidth() - diff);
 326         settings->setItemHeight(settings->itemHeight() - diff);
 327
 328         updateGridSize(showPreview, additionalInfoCount());
 329     }
 330 }
 331
 332 void DolphinIconsView::requestActivation()
 333 {
 334     m_controller->requestActivation();
 335 }
 336
 337 void DolphinIconsView::updateFont()
 338 {
 339     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 340     Q_ASSERT(settings != 0);
 341
 342     if (settings->useSystemFont()) {
 343         m_font = KGlobalSettings::generalFont();
 344     }
 345 }
 346
 347 bool DolphinIconsView::isZoomInPossible() const
 348 {
 349     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 350     const bool showPreview = m_controller->dolphinView()->showPreview();
 351     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 352     return size < KIconLoader::SizeEnormous;
 353 }
 354
 355 bool DolphinIconsView::isZoomOutPossible() 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::SizeSmall;
 361 }
 362
 363 int DolphinIconsView::increasedIconSize(int size) const
 364 {
 365     int incSize = 0;
 366     switch (size) {
 367     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 368     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 369     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 370     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 371     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 372     default: Q_ASSERT(false); break;
 373     }
 374     return incSize;
 375 }
 376
 377 int DolphinIconsView::decreasedIconSize(int size) const
 378 {
 379     int decSize = 0;
 380     switch (size) {
 381     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 382     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 383     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 384     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 385     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 386     default: Q_ASSERT(false); break;
 387     }
 388     return decSize;
 389 }
 390
 391 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 392 {
 393     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 394     Q_ASSERT(settings != 0);
 395
 396     int itemWidth = settings->itemWidth();
 397     int itemHeight = settings->itemHeight();
 398     int size = settings->iconSize();
 399
 400     if (showPreview) {
 401         const int previewSize = settings->previewSize();
 402         const int diff = previewSize - size;
 403         itemWidth  += diff;
 404         itemHeight += diff;
 405
 406         size = previewSize;
 407     }
 408
 409     Q_ASSERT(additionalInfoCount >= 0);
 410     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 411
 412     if (settings->arrangement() == QListView::TopToBottom) {
 413         // The decoration width indirectly defines the maximum
 414         // width for the text wrapping. To use the maximum item width
 415         // for text wrapping, it is used as decoration width.
 416         m_decorationSize = QSize(itemWidth, size);
 417         setIconSize(QSize(itemWidth, size));
 418     } else {
 419         m_decorationSize = QSize(size, size);
 420         setIconSize(QSize(size, size));
 421     }
 422
 423     m_itemSize = QSize(itemWidth, itemHeight);
 424
 425     const int spacing = settings->gridSpacing();
 426     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 427
 428     m_controller->setZoomInPossible(isZoomInPossible());
 429     m_controller->setZoomOutPossible(isZoomOutPossible());
 430
 431     DolphinFileItemDelegate* delegate = qobject_cast<DolphinFileItemDelegate*>(itemDelegate());
 432     if (delegate != 0) {
 433         delegate->setMaximumSize(m_itemSize);
 434     }
 435 }
 436
 437 int DolphinIconsView::additionalInfoCount() const
 438 {
 439     const DolphinView* view = m_controller->dolphinView();
 440     return view->additionalInfo().count();
 441 }
 442
 443 #include "dolphiniconsview.moc"