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 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 137 {
 138     KCategorizedView::dataChanged(topLeft, bottomRight);
 139
 140     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 141     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 142         // bypass a QListView issue that items are not layout correctly if the decoration size of
 143         // an index changes
 144         scheduleDelayedItemsLayout();
 145     }
 146 }
 147
 148 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 149 {
 150     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 151     viewOptions.font = m_font;
 152     viewOptions.decorationPosition = m_decorationPosition;
 153     viewOptions.decorationSize = m_decorationSize;
 154     viewOptions.displayAlignment = m_displayAlignment;
 155     viewOptions.showDecorationSelected = true;
 156     return viewOptions;
 157 }
 158
 159 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 160 {
 161     KCategorizedView::contextMenuEvent(event);
 162     m_controller->triggerContextMenuRequest(event->pos());
 163 }
 164
 165 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 166 {
 167     m_controller->requestActivation();
 168     if (!indexAt(event->pos()).isValid()) {
 169         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 170         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 171             clearSelection();
 172         }
 173     }
 174
 175     KCategorizedView::mousePressEvent(event);
 176 }
 177
 178 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 179 {
 180     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 181     // fix this in KDE 4.1
 182     KCategorizedView::startDrag(supportedActions);
 183     DragAndDropHelper::startDrag(this, supportedActions);
 184 }
 185
 186 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 187 {
 188     if (event->mimeData()->hasUrls()) {
 189         event->acceptProposedAction();
 190     }
 191 }
 192
 193 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 194 {
 195     KCategorizedView::dragLeaveEvent(event);
 196     setDirtyRegion(m_dropRect);
 197 }
 198
 199 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 200 {
 201     KCategorizedView::dragMoveEvent(event);
 202
 203     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 204     const QModelIndex index = indexAt(event->pos());
 205     setDirtyRegion(m_dropRect);
 206
 207     m_dropRect.setSize(QSize()); // set as invalid
 208     if (index.isValid()) {
 209         const KFileItem item = m_controller->itemForIndex(index);
 210         if (!item.isNull() && item.isDir()) {
 211             m_dropRect = visualRect(index);
 212         } else {
 213             m_dropRect.setSize(QSize()); // set as invalid
 214         }
 215     }
 216     if (event->mimeData()->hasUrls()) {
 217         // accept url drops, independently from the destination item
 218         event->acceptProposedAction();
 219     }
 220
 221     setDirtyRegion(m_dropRect);
 222 }
 223
 224 void DolphinIconsView::dropEvent(QDropEvent* event)
 225 {
 226     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 227         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 228         if (!urls.isEmpty()) {
 229             const QModelIndex index = indexAt(event->pos());
 230             const KFileItem item = m_controller->itemForIndex(index);
 231             m_controller->indicateDroppedUrls(urls,
 232                                               m_controller->url(),
 233                                               item);
 234             event->acceptProposedAction();
 235         }
 236     }
 237
 238     KCategorizedView::dropEvent(event);
 239 }
 240
 241 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 242 {
 243     KCategorizedView::keyPressEvent(event);
 244     m_controller->handleKeyPressEvent(event);
 245 }
 246
 247 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 248 {
 249     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 250     if (event->modifiers() & Qt::ControlModifier) {
 251         event->ignore();
 252         return;
 253     }
 254     KCategorizedView::wheelEvent(event);
 255     // if the icons are aligned left to right, the vertical wheel event should
 256     // be applied to the horizontal scrollbar
 257     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 258     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 259                                   (settings->arrangement() == QListView::LeftToRight);
 260     if (scrollHorizontal) {
 261         QWheelEvent horizEvent(event->pos(),
 262                                event->delta(),
 263                                event->buttons(),
 264                                event->modifiers(),
 265                                Qt::Horizontal);
 266         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 267     }
 268 }
 269
 270 void DolphinIconsView::showEvent(QShowEvent* event)
 271 {
 272     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 273     delegate->setMaximumSize(m_itemSize);
 274
 275     KCategorizedView::showEvent(event);
 276 }
 277
 278 void DolphinIconsView::slotShowPreviewChanged()
 279 {
 280     const DolphinView* view = m_controller->dolphinView();
 281     updateGridSize(view->showPreview(), additionalInfoCount());
 282 }
 283
 284 void DolphinIconsView::slotAdditionalInfoChanged()
 285 {
 286     const DolphinView* view = m_controller->dolphinView();
 287     const bool showPreview = view->showPreview();
 288     updateGridSize(showPreview, view->additionalInfo().count());
 289 }
 290
 291 void DolphinIconsView::zoomIn()
 292 {
 293     if (isZoomInPossible()) {
 294         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 295
 296         const int oldIconSize = settings->iconSize();
 297         int newIconSize = oldIconSize;
 298
 299         const bool showPreview = m_controller->dolphinView()->showPreview();
 300         if (showPreview) {
 301             const int previewSize = increasedIconSize(settings->previewSize());
 302             settings->setPreviewSize(previewSize);
 303         } else {
 304             newIconSize = increasedIconSize(oldIconSize);
 305             settings->setIconSize(newIconSize);
 306         }
 307
 308         // increase also the grid size
 309         const int diff = newIconSize - oldIconSize;
 310         settings->setItemWidth(settings->itemWidth() + diff);
 311         settings->setItemHeight(settings->itemHeight() + diff);
 312
 313         updateGridSize(showPreview, additionalInfoCount());
 314     }
 315 }
 316
 317 void DolphinIconsView::zoomOut()
 318 {
 319     if (isZoomOutPossible()) {
 320         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 321
 322         const int oldIconSize = settings->iconSize();
 323         int newIconSize = oldIconSize;
 324
 325         const bool showPreview = m_controller->dolphinView()->showPreview();
 326         if (showPreview) {
 327             const int previewSize = decreasedIconSize(settings->previewSize());
 328             settings->setPreviewSize(previewSize);
 329         } else {
 330             newIconSize = decreasedIconSize(settings->iconSize());
 331             settings->setIconSize(newIconSize);
 332         }
 333
 334         // decrease also the grid size
 335         const int diff = oldIconSize - newIconSize;
 336         settings->setItemWidth(settings->itemWidth() - diff);
 337         settings->setItemHeight(settings->itemHeight() - diff);
 338
 339         updateGridSize(showPreview, additionalInfoCount());
 340     }
 341 }
 342
 343 void DolphinIconsView::requestActivation()
 344 {
 345     m_controller->requestActivation();
 346 }
 347
 348 void DolphinIconsView::updateFont()
 349 {
 350     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 351     Q_ASSERT(settings != 0);
 352
 353     if (settings->useSystemFont()) {
 354         m_font = KGlobalSettings::generalFont();
 355     }
 356 }
 357
 358 bool DolphinIconsView::isZoomInPossible() const
 359 {
 360     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 361     const bool showPreview = m_controller->dolphinView()->showPreview();
 362     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 363     return size < KIconLoader::SizeEnormous;
 364 }
 365
 366 bool DolphinIconsView::isZoomOutPossible() const
 367 {
 368     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 369     const bool showPreview = m_controller->dolphinView()->showPreview();
 370     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 371     return size > KIconLoader::SizeSmall;
 372 }
 373
 374 int DolphinIconsView::increasedIconSize(int size) const
 375 {
 376     int incSize = 0;
 377     switch (size) {
 378     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 379     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 380     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 381     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 382     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 383     default: Q_ASSERT(false); break;
 384     }
 385     return incSize;
 386 }
 387
 388 int DolphinIconsView::decreasedIconSize(int size) const
 389 {
 390     int decSize = 0;
 391     switch (size) {
 392     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 393     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 394     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 395     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 396     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 397     default: Q_ASSERT(false); break;
 398     }
 399     return decSize;
 400 }
 401
 402 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 403 {
 404     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 405     Q_ASSERT(settings != 0);
 406
 407     int itemWidth = settings->itemWidth();
 408     int itemHeight = settings->itemHeight();
 409     int size = settings->iconSize();
 410
 411     if (showPreview) {
 412         const int previewSize = settings->previewSize();
 413         const int diff = previewSize - size;
 414         itemWidth  += diff;
 415         itemHeight += diff;
 416
 417         size = previewSize;
 418     }
 419
 420     Q_ASSERT(additionalInfoCount >= 0);
 421     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 422
 423     if (settings->arrangement() == QListView::TopToBottom) {
 424         // The decoration width indirectly defines the maximum
 425         // width for the text wrapping. To use the maximum item width
 426         // for text wrapping, it is used as decoration width.
 427         m_decorationSize = QSize(itemWidth, size);
 428         setIconSize(QSize(itemWidth, size));
 429     } else {
 430         m_decorationSize = QSize(size, size);
 431         setIconSize(QSize(size, size));
 432     }
 433
 434     m_itemSize = QSize(itemWidth, itemHeight);
 435
 436     const int spacing = settings->gridSpacing();
 437     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 438
 439     m_controller->setZoomInPossible(isZoomInPossible());
 440     m_controller->setZoomOutPossible(isZoomOutPossible());
 441
 442     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 443     if (delegate != 0) {
 444         delegate->setMaximumSize(m_itemSize);
 445     }
 446 }
 447
 448 int DolphinIconsView::additionalInfoCount() const
 449 {
 450     const DolphinView* view = m_controller->dolphinView();
 451     return view->additionalInfo().count();
 452 }
 453
 454 #include "dolphiniconsview.moc"