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
  34 #include <QAbstractProxyModel>
  35 #include <QApplication>
  36 #include <QPainter>
  37 #include <QPoint>
  38 #include <QScrollBar>
  39
  40 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  41     KCategorizedView(parent),
  42     m_controller(controller),
  43     m_categoryDrawer(0),
  44     m_font(),
  45     m_decorationSize(),
  46     m_decorationPosition(QStyleOptionViewItem::Top),
  47     m_displayAlignment(Qt::AlignHCenter),
  48     m_itemSize(),
  49     m_dropRect()
  50 {
  51     Q_ASSERT(controller != 0);
  52     setViewMode(QListView::IconMode);
  53     setResizeMode(QListView::Adjust);
  54     setSpacing(KDialog::spacingHint());
  55     setMovement(QListView::Static);
  56     setDragEnabled(true);
  57     viewport()->setAcceptDrops(true);
  58
  59     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  60     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  61     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  62     // RETURN-key in keyPressEvent().
  63     if (KGlobalSettings::singleClick()) {
  64         connect(this, SIGNAL(clicked(const QModelIndex&)),
  65                 controller, SLOT(triggerItem(const QModelIndex&)));
  66         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  67             SelectionManager* selManager = new SelectionManager(this);
  68             connect(selManager, SIGNAL(selectionChanged()),
  69                     this, SLOT(requestActivation()));
  70             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  71                     selManager, SLOT(reset()));
  72         }
  73     } else {
  74         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  75                 controller, SLOT(triggerItem(const QModelIndex&)));
  76     }
  77     connect(this, SIGNAL(entered(const QModelIndex&)),
  78             controller, SLOT(emitItemEntered(const QModelIndex&)));
  79     connect(this, SIGNAL(viewportEntered()),
  80             controller, SLOT(emitViewportEntered()));
  81     connect(controller, SIGNAL(zoomIn()),
  82             this, SLOT(zoomIn()));
  83     connect(controller, SIGNAL(zoomOut()),
  84             this, SLOT(zoomOut()));
  85
  86     const DolphinView* view = controller->dolphinView();
  87     connect(view, SIGNAL(showPreviewChanged()),
  88             this, SLOT(slotShowPreviewChanged()));
  89     connect(view, SIGNAL(additionalInfoChanged()),
  90             this, SLOT(slotAdditionalInfoChanged()));
  91
  92     // apply the icons mode settings to the widget
  93     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  94     Q_ASSERT(settings != 0);
  95
  96     if (settings->useSystemFont()) {
  97         m_font = KGlobalSettings::generalFont();
  98     } else {
  99         m_font = QFont(settings->fontFamily(),
 100                        settings->fontSize(),
 101                        settings->fontWeight(),
 102                        settings->italicFont());
 103     }
 104
 105     setWordWrap(settings->numberOfTextlines() > 1);
 106     updateGridSize(view->showPreview(), 0);
 107
 108     if (settings->arrangement() == QListView::TopToBottom) {
 109         setFlow(QListView::LeftToRight);
 110         m_decorationPosition = QStyleOptionViewItem::Top;
 111         m_displayAlignment = Qt::AlignHCenter;
 112     } else {
 113         setFlow(QListView::TopToBottom);
 114         m_decorationPosition = QStyleOptionViewItem::Left;
 115         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 116     }
 117
 118     m_categoryDrawer = new DolphinCategoryDrawer();
 119     setCategoryDrawer(m_categoryDrawer);
 120
 121     setFocus();
 122
 123     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 124             this, SLOT(updateFont()));
 125 }
 126
 127 DolphinIconsView::~DolphinIconsView()
 128 {
 129     delete m_categoryDrawer;
 130     m_categoryDrawer = 0;
 131 }
 132
 133 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 134 {
 135     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 136
 137     QRect itemRect = KCategorizedView::visualRect(index);
 138
 139     const int maxWidth  = m_itemSize.width();
 140     const int maxHeight = m_itemSize.height();
 141
 142     if (itemRect.width() > maxWidth) {
 143         // assure that the maximum item width is not exceeded
 144         if (leftToRightFlow) {
 145             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 146             itemRect.setLeft(left);
 147         }
 148         itemRect.setWidth(maxWidth);
 149     }
 150
 151     if (itemRect.height() > maxHeight) {
 152         // assure that the maximum item height is not exceeded
 153         if (!leftToRightFlow) {
 154             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 155             itemRect.setTop(top);
 156         }
 157         itemRect.setHeight(maxHeight);
 158     }
 159
 160     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 161     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 162         // TODO: QListView::visualRect() calculates a wrong position of the items under
 163         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 164         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 165         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 166         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 167         const int margin = settings->gridSpacing();
 168         const int gridWidth = gridSize().width();
 169         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 170         const int centerInc = (maxWidth - itemRect.width()) / 2;
 171         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 172     }
 173
 174     return itemRect;
 175 }
 176
 177 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 178 {
 179     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 180     viewOptions.font = m_font;
 181     viewOptions.decorationPosition = m_decorationPosition;
 182     viewOptions.decorationSize = m_decorationSize;
 183     viewOptions.displayAlignment = m_displayAlignment;
 184     viewOptions.showDecorationSelected = true;
 185     return viewOptions;
 186 }
 187
 188 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 189 {
 190     KCategorizedView::contextMenuEvent(event);
 191     m_controller->triggerContextMenuRequest(event->pos());
 192 }
 193
 194 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 195 {
 196     m_controller->requestActivation();
 197     if (!indexAt(event->pos()).isValid()) {
 198         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 199         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 200             clearSelection();
 201         }
 202     }
 203
 204     KCategorizedView::mousePressEvent(event);
 205 }
 206
 207 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 208 {
 209     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 210     // fix this in KDE 4.1
 211     KCategorizedView::startDrag(supportedActions);
 212     DragAndDropHelper::startDrag(this, supportedActions);
 213 }
 214
 215 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 216 {
 217     if (event->mimeData()->hasUrls()) {
 218         event->acceptProposedAction();
 219     }
 220 }
 221
 222 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 223 {
 224     KCategorizedView::dragLeaveEvent(event);
 225     setDirtyRegion(m_dropRect);
 226 }
 227
 228 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 229 {
 230     KCategorizedView::dragMoveEvent(event);
 231
 232     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 233     const QModelIndex index = indexAt(event->pos());
 234     setDirtyRegion(m_dropRect);
 235
 236     m_dropRect.setSize(QSize()); // set as invalid
 237     if (index.isValid()) {
 238         const KFileItem item = m_controller->itemForIndex(index);
 239         if (!item.isNull() && item.isDir()) {
 240             m_dropRect = visualRect(index);
 241         } else {
 242             m_dropRect.setSize(QSize()); // set as invalid
 243         }
 244     }
 245     if (event->mimeData()->hasUrls()) {
 246         // accept url drops, independently from the destination item
 247         event->acceptProposedAction();
 248     }
 249
 250     setDirtyRegion(m_dropRect);
 251 }
 252
 253 void DolphinIconsView::dropEvent(QDropEvent* event)
 254 {
 255     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 256         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 257         if (!urls.isEmpty()) {
 258             const QModelIndex index = indexAt(event->pos());
 259             const KFileItem item = m_controller->itemForIndex(index);
 260             m_controller->indicateDroppedUrls(urls,
 261                                               m_controller->url(),
 262                                               item);
 263             event->acceptProposedAction();
 264         }
 265     }
 266
 267     KCategorizedView::dropEvent(event);
 268 }
 269
 270 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 271 {
 272     KCategorizedView::keyPressEvent(event);
 273     m_controller->handleKeyPressEvent(event);
 274 }
 275
 276 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 277 {
 278     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 279     if (event->modifiers() & Qt::ControlModifier) {
 280         event->ignore();
 281         return;
 282     }
 283     KCategorizedView::wheelEvent(event);
 284     // if the icons are aligned left to right, the vertical wheel event should
 285     // be applied to the horizontal scrollbar
 286     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 287     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 288                                   (settings->arrangement() == QListView::LeftToRight);
 289     if (scrollHorizontal) {
 290         QWheelEvent horizEvent(event->pos(),
 291                                event->delta(),
 292                                event->buttons(),
 293                                event->modifiers(),
 294                                Qt::Horizontal);
 295         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 296     }
 297 }
 298
 299 void DolphinIconsView::slotShowPreviewChanged()
 300 {
 301     const DolphinView* view = m_controller->dolphinView();
 302     updateGridSize(view->showPreview(), additionalInfoCount());
 303 }
 304
 305 void DolphinIconsView::slotAdditionalInfoChanged()
 306 {
 307     const DolphinView* view = m_controller->dolphinView();
 308     const bool showPreview = view->showPreview();
 309     updateGridSize(showPreview, view->additionalInfo().count());
 310 }
 311
 312 void DolphinIconsView::zoomIn()
 313 {
 314     if (isZoomInPossible()) {
 315         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 316
 317         const int oldIconSize = settings->iconSize();
 318         int newIconSize = oldIconSize;
 319
 320         const bool showPreview = m_controller->dolphinView()->showPreview();
 321         if (showPreview) {
 322             const int previewSize = increasedIconSize(settings->previewSize());
 323             settings->setPreviewSize(previewSize);
 324         } else {
 325             newIconSize = increasedIconSize(oldIconSize);
 326             settings->setIconSize(newIconSize);
 327             if (settings->previewSize() < newIconSize) {
 328                 // assure that the preview size is always >= the icon size
 329                 settings->setPreviewSize(newIconSize);
 330             }
 331         }
 332
 333         // increase also the grid size
 334         const int diff = newIconSize - oldIconSize;
 335         settings->setItemWidth(settings->itemWidth() + diff);
 336         settings->setItemHeight(settings->itemHeight() + diff);
 337
 338         updateGridSize(showPreview, additionalInfoCount());
 339     }
 340 }
 341
 342 void DolphinIconsView::zoomOut()
 343 {
 344     if (isZoomOutPossible()) {
 345         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 346
 347         const int oldIconSize = settings->iconSize();
 348         int newIconSize = oldIconSize;
 349
 350         const bool showPreview = m_controller->dolphinView()->showPreview();
 351         if (showPreview) {
 352             const int previewSize = decreasedIconSize(settings->previewSize());
 353             settings->setPreviewSize(previewSize);
 354             if (settings->iconSize() > previewSize) {
 355                 // assure that the icon size is always <= the preview size
 356                 newIconSize = previewSize;
 357                 settings->setIconSize(newIconSize);
 358             }
 359         } else {
 360             newIconSize = decreasedIconSize(settings->iconSize());
 361             settings->setIconSize(newIconSize);
 362         }
 363
 364         // decrease also the grid size
 365         const int diff = oldIconSize - newIconSize;
 366         settings->setItemWidth(settings->itemWidth() - diff);
 367         settings->setItemHeight(settings->itemHeight() - diff);
 368
 369         updateGridSize(showPreview, additionalInfoCount());
 370     }
 371 }
 372
 373 void DolphinIconsView::requestActivation()
 374 {
 375     m_controller->requestActivation();
 376 }
 377
 378 void DolphinIconsView::updateFont()
 379 {
 380     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 381     Q_ASSERT(settings != 0);
 382
 383     if (settings->useSystemFont()) {
 384         m_font = KGlobalSettings::generalFont();
 385     }
 386 }
 387
 388 bool DolphinIconsView::isZoomInPossible() const
 389 {
 390     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 391     const bool showPreview = m_controller->dolphinView()->showPreview();
 392     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 393     return size < KIconLoader::SizeEnormous;
 394 }
 395
 396 bool DolphinIconsView::isZoomOutPossible() const
 397 {
 398     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 399     const bool showPreview = m_controller->dolphinView()->showPreview();
 400     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 401     return size > KIconLoader::SizeSmall;
 402 }
 403
 404 int DolphinIconsView::increasedIconSize(int size) const
 405 {
 406     int incSize = 0;
 407     switch (size) {
 408     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 409     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 410     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 411     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 412     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 413     default: Q_ASSERT(false); break;
 414     }
 415     return incSize;
 416 }
 417
 418 int DolphinIconsView::decreasedIconSize(int size) const
 419 {
 420     int decSize = 0;
 421     switch (size) {
 422     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 423     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 424     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 425     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 426     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 427     default: Q_ASSERT(false); break;
 428     }
 429     return decSize;
 430 }
 431
 432 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 433 {
 434     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 435     Q_ASSERT(settings != 0);
 436
 437     int itemWidth = settings->itemWidth();
 438     int itemHeight = settings->itemHeight();
 439     int size = settings->iconSize();
 440
 441     if (showPreview) {
 442         const int previewSize = settings->previewSize();
 443         const int diff = previewSize - size;
 444         Q_ASSERT(diff >= 0);
 445         itemWidth  += diff;
 446         itemHeight += diff;
 447
 448         size = previewSize;
 449     }
 450
 451     Q_ASSERT(additionalInfoCount >= 0);
 452     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 453
 454     if (settings->arrangement() == QListView::TopToBottom) {
 455         // The decoration width indirectly defines the maximum
 456         // width for the text wrapping. To use the maximum item width
 457         // for text wrapping, it is used as decoration width.
 458         m_decorationSize = QSize(itemWidth, size);
 459         setIconSize(QSize(itemWidth, size));
 460     } else {
 461         m_decorationSize = QSize(size, size);
 462         setIconSize(QSize(size, size));
 463     }
 464
 465     m_itemSize = QSize(itemWidth, itemHeight);
 466
 467     const int spacing = settings->gridSpacing();
 468     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 469
 470     m_controller->setZoomInPossible(isZoomInPossible());
 471     m_controller->setZoomOutPossible(isZoomOutPossible());
 472 }
 473
 474 int DolphinIconsView::additionalInfoCount() const
 475 {
 476     const DolphinView* view = m_controller->dolphinView();
 477     return view->additionalInfo().count();
 478 }
 479
 480 #include "dolphiniconsview.moc"