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 <QScrollBar>
  38
  39 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  40     KCategorizedView(parent),
  41     m_enableScrollTo(false),
  42     m_controller(controller),
  43     m_selectionManager(0),
  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             m_selectionManager = new SelectionManager(this);
  72             connect(m_selectionManager, SIGNAL(selectionChanged()),
  73                     this, SLOT(requestActivation()));
  74             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  75                     m_selectionManager, 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::scrollTo(const QModelIndex& index, ScrollHint hint)
 138 {
 139     // Enable the QListView implementation of scrollTo() only if it has been
 140     // triggered by a key press. Otherwise QAbstractItemView wants to scroll to the current
 141     // index each time the layout has been changed. This becomes an issue when
 142     // previews are loaded and the scrollbar is used: the scrollbar will always
 143     // be reset to 0 on each new preview.
 144     if (m_enableScrollTo || (state() != QAbstractItemView::NoState)) {
 145         KCategorizedView::scrollTo(index, hint);
 146         m_enableScrollTo = false;
 147     }
 148 }
 149
 150 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 151 {
 152     KCategorizedView::dataChanged(topLeft, bottomRight);
 153
 154     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 155     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 156         // bypass a QListView issue that items are not layout correctly if the decoration size of
 157         // an index changes
 158         scheduleDelayedItemsLayout();
 159     }
 160 }
 161
 162 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 163 {
 164     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 165     viewOptions.font = m_font;
 166     viewOptions.decorationPosition = m_decorationPosition;
 167     viewOptions.decorationSize = m_decorationSize;
 168     viewOptions.displayAlignment = m_displayAlignment;
 169     viewOptions.showDecorationSelected = true;
 170     return viewOptions;
 171 }
 172
 173 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 174 {
 175     KCategorizedView::contextMenuEvent(event);
 176     m_controller->triggerContextMenuRequest(event->pos());
 177 }
 178
 179 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 180 {
 181     m_controller->requestActivation();
 182     const QModelIndex index = indexAt(event->pos());
 183     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 184         // TODO: It should not be necessary to manually set the dragging state, but I could
 185         // not reproduce this issue with a Qt-only example yet to find the root cause.
 186         // Issue description: start Dolphin, split the view and drag an item from the
 187         // inactive view to the active view by a very fast mouse movement. Result:
 188         // the item gets selected instead of being dragged...
 189         setState(QAbstractItemView::DraggingState);
 190     }
 191
 192     if (!index.isValid()) {
 193         if (QApplication::mouseButtons() & Qt::MidButton) {
 194             m_controller->replaceUrlByClipboard();
 195         }
 196         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 197         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 198             clearSelection();
 199         }
 200     }
 201
 202     KCategorizedView::mousePressEvent(event);
 203 }
 204
 205 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 206 {
 207     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 208     // fix this in KDE 4.1
 209     KCategorizedView::startDrag(supportedActions);
 210     DragAndDropHelper::startDrag(this, supportedActions);
 211 }
 212
 213 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 214 {
 215     if (event->mimeData()->hasUrls()) {
 216         event->acceptProposedAction();
 217     }
 218 }
 219
 220 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 221 {
 222     KCategorizedView::dragLeaveEvent(event);
 223     setDirtyRegion(m_dropRect);
 224 }
 225
 226 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 227 {
 228     KCategorizedView::dragMoveEvent(event);
 229
 230     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 231     const QModelIndex index = indexAt(event->pos());
 232     setDirtyRegion(m_dropRect);
 233
 234     m_dropRect.setSize(QSize()); // set as invalid
 235     if (index.isValid()) {
 236         const KFileItem item = m_controller->itemForIndex(index);
 237         if (!item.isNull() && item.isDir()) {
 238             m_dropRect = visualRect(index);
 239         } else {
 240             m_dropRect.setSize(QSize()); // set as invalid
 241         }
 242     }
 243     if (event->mimeData()->hasUrls()) {
 244         // accept url drops, independently from the destination item
 245         event->acceptProposedAction();
 246     }
 247
 248     setDirtyRegion(m_dropRect);
 249 }
 250
 251 void DolphinIconsView::dropEvent(QDropEvent* event)
 252 {
 253     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 254         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 255         if (!urls.isEmpty()) {
 256             const QModelIndex index = indexAt(event->pos());
 257             const KFileItem item = m_controller->itemForIndex(index);
 258             m_controller->indicateDroppedUrls(urls,
 259                                               m_controller->url(),
 260                                               item);
 261             event->acceptProposedAction();
 262         }
 263     }
 264
 265     KCategorizedView::dropEvent(event);
 266 }
 267
 268 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 269 {
 270     KCategorizedView::keyPressEvent(event);
 271     m_controller->handleKeyPressEvent(event);
 272     m_enableScrollTo = true; // see DolphinIconsView::scrollTo()
 273 }
 274
 275 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 276 {
 277     if (m_selectionManager != 0) {
 278         m_selectionManager->reset();
 279     }
 280
 281     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 282     if (event->modifiers() & Qt::ControlModifier) {
 283         event->ignore();
 284         return;
 285     }
 286     KCategorizedView::wheelEvent(event);
 287     // if the icons are aligned left to right, the vertical wheel event should
 288     // be applied to the horizontal scrollbar
 289     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 290     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 291                                   (settings->arrangement() == QListView::LeftToRight);
 292     if (scrollHorizontal) {
 293         QWheelEvent horizEvent(event->pos(),
 294                                event->delta(),
 295                                event->buttons(),
 296                                event->modifiers(),
 297                                Qt::Horizontal);
 298         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 299     }
 300 }
 301
 302 void DolphinIconsView::showEvent(QShowEvent* event)
 303 {
 304     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 305     delegate->setMaximumSize(m_itemSize);
 306
 307     KCategorizedView::showEvent(event);
 308 }
 309
 310 void DolphinIconsView::leaveEvent(QEvent* event)
 311 {
 312     KCategorizedView::leaveEvent(event);
 313     // if the mouse is above an item and moved very fast outside the widget,
 314     // no viewportEntered() signal might be emitted although the mouse has been moved
 315     // above the viewport
 316     m_controller->emitViewportEntered();
 317 }
 318
 319 void DolphinIconsView::slotShowPreviewChanged()
 320 {
 321     const DolphinView* view = m_controller->dolphinView();
 322     updateGridSize(view->showPreview(), additionalInfoCount());
 323 }
 324
 325 void DolphinIconsView::slotAdditionalInfoChanged()
 326 {
 327     const DolphinView* view = m_controller->dolphinView();
 328     const bool showPreview = view->showPreview();
 329     updateGridSize(showPreview, view->additionalInfo().count());
 330 }
 331
 332 void DolphinIconsView::zoomIn()
 333 {
 334     if (isZoomInPossible()) {
 335         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 336
 337         const int oldIconSize = settings->iconSize();
 338         int newIconSize = oldIconSize;
 339
 340         const bool showPreview = m_controller->dolphinView()->showPreview();
 341         if (showPreview) {
 342             const int previewSize = increasedIconSize(settings->previewSize());
 343             settings->setPreviewSize(previewSize);
 344         } else {
 345             newIconSize = increasedIconSize(oldIconSize);
 346             settings->setIconSize(newIconSize);
 347         }
 348
 349         // increase also the grid size
 350         const int diff = newIconSize - oldIconSize;
 351         settings->setItemWidth(settings->itemWidth() + diff);
 352         settings->setItemHeight(settings->itemHeight() + diff);
 353
 354         updateGridSize(showPreview, additionalInfoCount());
 355     }
 356 }
 357
 358 void DolphinIconsView::zoomOut()
 359 {
 360     if (isZoomOutPossible()) {
 361         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 362
 363         const int oldIconSize = settings->iconSize();
 364         int newIconSize = oldIconSize;
 365
 366         const bool showPreview = m_controller->dolphinView()->showPreview();
 367         if (showPreview) {
 368             const int previewSize = decreasedIconSize(settings->previewSize());
 369             settings->setPreviewSize(previewSize);
 370         } else {
 371             newIconSize = decreasedIconSize(settings->iconSize());
 372             settings->setIconSize(newIconSize);
 373         }
 374
 375         // decrease also the grid size
 376         const int diff = oldIconSize - newIconSize;
 377         settings->setItemWidth(settings->itemWidth() - diff);
 378         settings->setItemHeight(settings->itemHeight() - diff);
 379
 380         updateGridSize(showPreview, additionalInfoCount());
 381     }
 382 }
 383
 384 void DolphinIconsView::requestActivation()
 385 {
 386     m_controller->requestActivation();
 387 }
 388
 389 void DolphinIconsView::updateFont()
 390 {
 391     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 392     Q_ASSERT(settings != 0);
 393
 394     if (settings->useSystemFont()) {
 395         m_font = KGlobalSettings::generalFont();
 396     }
 397 }
 398
 399 bool DolphinIconsView::isZoomInPossible() const
 400 {
 401     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 402     const bool showPreview = m_controller->dolphinView()->showPreview();
 403     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 404     return size < KIconLoader::SizeEnormous;
 405 }
 406
 407 bool DolphinIconsView::isZoomOutPossible() const
 408 {
 409     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 410     const bool showPreview = m_controller->dolphinView()->showPreview();
 411     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 412     return size > KIconLoader::SizeSmall;
 413 }
 414
 415 int DolphinIconsView::increasedIconSize(int size) const
 416 {
 417     int incSize = 0;
 418     switch (size) {
 419     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 420     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 421     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 422     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 423     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 424     default: Q_ASSERT(false); break;
 425     }
 426     return incSize;
 427 }
 428
 429 int DolphinIconsView::decreasedIconSize(int size) const
 430 {
 431     int decSize = 0;
 432     switch (size) {
 433     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 434     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 435     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 436     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 437     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 438     default: Q_ASSERT(false); break;
 439     }
 440     return decSize;
 441 }
 442
 443 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 444 {
 445     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 446     Q_ASSERT(settings != 0);
 447
 448     int itemWidth = settings->itemWidth();
 449     int itemHeight = settings->itemHeight();
 450     int size = settings->iconSize();
 451
 452     if (showPreview) {
 453         const int previewSize = settings->previewSize();
 454         const int diff = previewSize - size;
 455         itemWidth  += diff;
 456         itemHeight += diff;
 457
 458         size = previewSize;
 459     }
 460
 461     Q_ASSERT(additionalInfoCount >= 0);
 462     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 463
 464     if (settings->arrangement() == QListView::TopToBottom) {
 465         // The decoration width indirectly defines the maximum
 466         // width for the text wrapping. To use the maximum item width
 467         // for text wrapping, it is used as decoration width.
 468         m_decorationSize = QSize(itemWidth, size);
 469         setIconSize(QSize(itemWidth, size));
 470     } else {
 471         m_decorationSize = QSize(size, size);
 472         setIconSize(QSize(size, size));
 473     }
 474
 475     m_itemSize = QSize(itemWidth, itemHeight);
 476
 477     const int spacing = settings->gridSpacing();
 478     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 479
 480     m_controller->setZoomInPossible(isZoomInPossible());
 481     m_controller->setZoomOutPossible(isZoomOutPossible());
 482
 483     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 484     if (delegate != 0) {
 485         delegate->setMaximumSize(m_itemSize);
 486     }
 487
 488     if (m_selectionManager != 0) {
 489         m_selectionManager->reset();
 490     }
 491 }
 492
 493 int DolphinIconsView::additionalInfoCount() const
 494 {
 495     const DolphinView* view = m_controller->dolphinView();
 496     return view->additionalInfo().count();
 497 }
 498
 499 #include "dolphiniconsview.moc"