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 "dolphinviewautoscroller.h"
  26 #include "dolphin_iconsmodesettings.h"
  27 #include "dolphin_generalsettings.h"
  28 #include "draganddrophelper.h"
  29 #include "selectionmanager.h"
  30 #include "zoomlevelinfo.h"
  31
  32 #include <kcategorizedsortfilterproxymodel.h>
  33 #include <kdialog.h>
  34 #include <kdirmodel.h>
  35 #include <kfileitemdelegate.h>
  36
  37 #include <QAbstractProxyModel>
  38 #include <QApplication>
  39 #include <QScrollBar>
  40
  41 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  42     KCategorizedView(parent),
  43     m_enableScrollTo(false),
  44     m_controller(controller),
  45     m_selectionManager(0),
  46     m_autoScroller(0),
  47     m_categoryDrawer(0),
  48     m_font(),
  49     m_decorationSize(),
  50     m_decorationPosition(QStyleOptionViewItem::Top),
  51     m_displayAlignment(Qt::AlignHCenter),
  52     m_itemSize(),
  53     m_dropRect()
  54 {
  55     Q_ASSERT(controller != 0);
  56     setLayoutDirection(Qt::LeftToRight);
  57     setViewMode(QListView::IconMode);
  58     setResizeMode(QListView::Adjust);
  59     setSpacing(KDialog::spacingHint());
  60     setMovement(QListView::Static);
  61     setDragEnabled(true);
  62     setEditTriggers(QAbstractItemView::NoEditTriggers);
  63     viewport()->setAcceptDrops(true);
  64
  65     setMouseTracking(true);
  66     m_autoScroller = new DolphinViewAutoScroller(this);
  67
  68     connect(this, SIGNAL(clicked(const QModelIndex&)),
  69             controller, SLOT(requestTab(const QModelIndex&)));
  70     if (KGlobalSettings::singleClick()) {
  71         connect(this, SIGNAL(clicked(const QModelIndex&)),
  72                 controller, SLOT(triggerItem(const QModelIndex&)));
  73     } else {
  74         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  75                 controller, SLOT(triggerItem(const QModelIndex&)));
  76     }
  77
  78     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  79         m_selectionManager = new SelectionManager(this);
  80         connect(m_selectionManager, SIGNAL(selectionChanged()),
  81                 this, SLOT(requestActivation()));
  82         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  83                 m_selectionManager, SLOT(reset()));
  84     }
  85
  86     connect(this, SIGNAL(entered(const QModelIndex&)),
  87             controller, SLOT(emitItemEntered(const QModelIndex&)));
  88     connect(this, SIGNAL(viewportEntered()),
  89             controller, SLOT(emitViewportEntered()));
  90     connect(controller, SIGNAL(zoomLevelChanged(int)),
  91             this, SLOT(setZoomLevel(int)));
  92
  93     const DolphinView* view = controller->dolphinView();
  94     connect(view, SIGNAL(showPreviewChanged()),
  95             this, SLOT(slotShowPreviewChanged()));
  96     connect(view, SIGNAL(additionalInfoChanged()),
  97             this, SLOT(slotAdditionalInfoChanged()));
  98
  99     // apply the icons mode settings to the widget
 100     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 101     Q_ASSERT(settings != 0);
 102
 103     if (settings->useSystemFont()) {
 104         m_font = KGlobalSettings::generalFont();
 105     } else {
 106         m_font = QFont(settings->fontFamily(),
 107                        settings->fontSize(),
 108                        settings->fontWeight(),
 109                        settings->italicFont());
 110     }
 111
 112     setWordWrap(settings->numberOfTextlines() > 1);
 113     updateGridSize(view->showPreview(), 0);
 114
 115     if (settings->arrangement() == QListView::TopToBottom) {
 116         setFlow(QListView::LeftToRight);
 117         m_decorationPosition = QStyleOptionViewItem::Top;
 118         m_displayAlignment = Qt::AlignHCenter;
 119     } else {
 120         setFlow(QListView::TopToBottom);
 121         m_decorationPosition = QStyleOptionViewItem::Left;
 122         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 123     }
 124
 125     m_categoryDrawer = new DolphinCategoryDrawer();
 126     setCategoryDrawer(m_categoryDrawer);
 127
 128     setFocus();
 129
 130     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 131             this, SLOT(updateFont()));
 132 }
 133
 134 DolphinIconsView::~DolphinIconsView()
 135 {
 136     delete m_categoryDrawer;
 137     m_categoryDrawer = 0;
 138 }
 139
 140 void DolphinIconsView::scrollTo(const QModelIndex& index, ScrollHint hint)
 141 {
 142     // Enable the QListView implementation of scrollTo() only if it has been
 143     // triggered by a key press. Otherwise QAbstractItemView wants to scroll to the current
 144     // index each time the layout has been changed. This becomes an issue when
 145     // previews are loaded and the scrollbar is used: the scrollbar will always
 146     // be reset to 0 on each new preview.
 147     if (m_enableScrollTo || (state() != QAbstractItemView::NoState)) {
 148         KCategorizedView::scrollTo(index, hint);
 149         m_enableScrollTo = false;
 150     }
 151 }
 152
 153 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 154 {
 155     KCategorizedView::dataChanged(topLeft, bottomRight);
 156
 157     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 158     if (!proxyModel->isCategorizedModel()) {
 159         // bypass a QListView issue that items are not layout correctly if the decoration size of
 160         // an index changes
 161         scheduleDelayedItemsLayout();
 162     }
 163 }
 164
 165 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 166 {
 167     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 168     viewOptions.font = m_font;
 169     viewOptions.decorationPosition = m_decorationPosition;
 170     viewOptions.decorationSize = m_decorationSize;
 171     viewOptions.displayAlignment = m_displayAlignment;
 172     viewOptions.showDecorationSelected = true;
 173     return viewOptions;
 174 }
 175
 176 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 177 {
 178     KCategorizedView::contextMenuEvent(event);
 179     m_controller->triggerContextMenuRequest(event->pos());
 180 }
 181
 182 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 183 {
 184     m_controller->requestActivation();
 185     const QModelIndex index = indexAt(event->pos());
 186     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 187         // TODO: It should not be necessary to manually set the dragging state, but I could
 188         // not reproduce this issue with a Qt-only example yet to find the root cause.
 189         // Issue description: start Dolphin, split the view and drag an item from the
 190         // inactive view to the active view by a very fast mouse movement. Result:
 191         // the item gets selected instead of being dragged...
 192         setState(QAbstractItemView::DraggingState);
 193     }
 194
 195     if (!index.isValid()) {
 196         if (QApplication::mouseButtons() & Qt::MidButton) {
 197             m_controller->replaceUrlByClipboard();
 198         }
 199         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 200         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 201             clearSelection();
 202         }
 203     }
 204
 205     KCategorizedView::mousePressEvent(event);
 206 }
 207
 208 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 209 {
 210     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 211     // fix this in KDE 4.1
 212     KCategorizedView::startDrag(supportedActions);
 213     DragAndDropHelper::instance().startDrag(this, supportedActions, m_controller);
 214 }
 215
 216 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 217 {
 218     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 219         event->acceptProposedAction();
 220     }
 221 }
 222
 223 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 224 {
 225     KCategorizedView::dragLeaveEvent(event);
 226     setDirtyRegion(m_dropRect);
 227 }
 228
 229 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 230 {
 231     KCategorizedView::dragMoveEvent(event);
 232
 233     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 234     const QModelIndex index = indexAt(event->pos());
 235     setDirtyRegion(m_dropRect);
 236
 237     m_dropRect.setSize(QSize()); // set as invalid
 238     if (index.isValid()) {
 239         const KFileItem item = m_controller->itemForIndex(index);
 240         if (!item.isNull() && item.isDir()) {
 241             m_dropRect = visualRect(index);
 242         } else {
 243             m_dropRect.setSize(QSize()); // set as invalid
 244         }
 245     }
 246     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 247         // accept url drops, independently from the destination item
 248         event->acceptProposedAction();
 249     }
 250
 251     setDirtyRegion(m_dropRect);
 252 }
 253
 254 void DolphinIconsView::dropEvent(QDropEvent* event)
 255 {
 256     const QModelIndex index = indexAt(event->pos());
 257     const KFileItem item = m_controller->itemForIndex(index);
 258     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 259
 260     KCategorizedView::dropEvent(event);
 261 }
 262
 263 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 264 {
 265     KCategorizedView::keyPressEvent(event);
 266     m_controller->handleKeyPressEvent(event);
 267     m_enableScrollTo = true; // see DolphinIconsView::scrollTo()
 268 }
 269
 270 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 271 {
 272     if (m_selectionManager != 0) {
 273         m_selectionManager->reset();
 274     }
 275
 276     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 277     if (event->modifiers() & Qt::ControlModifier) {
 278         event->ignore();
 279         return;
 280     }
 281
 282     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 283     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 284
 285     KCategorizedView::wheelEvent(event);
 286     // if the icons are aligned left to right, the vertical wheel event should
 287     // be applied to the horizontal scrollbar
 288     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 289     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 290                                   (settings->arrangement() == QListView::LeftToRight);
 291     if (scrollHorizontal) {
 292         QWheelEvent horizEvent(event->pos(),
 293                                event->delta(),
 294                                event->buttons(),
 295                                event->modifiers(),
 296                                Qt::Horizontal);
 297         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 298     }
 299 }
 300
 301 void DolphinIconsView::showEvent(QShowEvent* event)
 302 {
 303     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 304     delegate->setMaximumSize(m_itemSize);
 305
 306     KCategorizedView::showEvent(event);
 307 }
 308
 309 void DolphinIconsView::leaveEvent(QEvent* event)
 310 {
 311     KCategorizedView::leaveEvent(event);
 312     // if the mouse is above an item and moved very fast outside the widget,
 313     // no viewportEntered() signal might be emitted although the mouse has been moved
 314     // above the viewport
 315     m_controller->emitViewportEntered();
 316 }
 317
 318 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 319 {
 320     KCategorizedView::currentChanged(current, previous);
 321     if (current.isValid() && !m_autoScroller->isActive()) {
 322         scrollTo(current);
 323     }
 324 }
 325
 326 void DolphinIconsView::slotShowPreviewChanged()
 327 {
 328     const DolphinView* view = m_controller->dolphinView();
 329     updateGridSize(view->showPreview(), additionalInfoCount());
 330 }
 331
 332 void DolphinIconsView::slotAdditionalInfoChanged()
 333 {
 334     const DolphinView* view = m_controller->dolphinView();
 335     const bool showPreview = view->showPreview();
 336     updateGridSize(showPreview, view->additionalInfo().count());
 337 }
 338
 339 void DolphinIconsView::setZoomLevel(int level)
 340 {
 341     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 342
 343     const int oldIconSize = settings->iconSize();
 344     int newIconSize = oldIconSize;
 345
 346     const bool showPreview = m_controller->dolphinView()->showPreview();
 347     if (showPreview) {
 348         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 349         settings->setPreviewSize(previewSize);
 350     } else {
 351         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 352         settings->setIconSize(newIconSize);
 353     }
 354
 355     // increase also the grid size
 356     const int diff = newIconSize - oldIconSize;
 357     settings->setItemWidth(settings->itemWidth() + diff);
 358     settings->setItemHeight(settings->itemHeight() + diff);
 359
 360     updateGridSize(showPreview, additionalInfoCount());
 361 }
 362
 363 void DolphinIconsView::requestActivation()
 364 {
 365     m_controller->requestActivation();
 366 }
 367
 368 void DolphinIconsView::updateFont()
 369 {
 370     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 371     Q_ASSERT(settings != 0);
 372
 373     if (settings->useSystemFont()) {
 374         m_font = KGlobalSettings::generalFont();
 375     }
 376 }
 377
 378 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 379 {
 380     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 381     Q_ASSERT(settings != 0);
 382
 383     int itemWidth = settings->itemWidth();
 384     int itemHeight = settings->itemHeight();
 385     int size = settings->iconSize();
 386
 387     if (showPreview) {
 388         const int previewSize = settings->previewSize();
 389         const int diff = previewSize - size;
 390         itemWidth  += diff;
 391         itemHeight += diff;
 392
 393         size = previewSize;
 394     }
 395
 396     Q_ASSERT(additionalInfoCount >= 0);
 397     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 398
 399     if (settings->arrangement() == QListView::TopToBottom) {
 400         // The decoration width indirectly defines the maximum
 401         // width for the text wrapping. To use the maximum item width
 402         // for text wrapping, it is used as decoration width.
 403         m_decorationSize = QSize(itemWidth, size);
 404         setIconSize(QSize(itemWidth, size));
 405     } else {
 406         m_decorationSize = QSize(size, size);
 407         setIconSize(QSize(size, size));
 408     }
 409
 410     m_itemSize = QSize(itemWidth, itemHeight);
 411
 412     const int spacing = settings->gridSpacing();
 413     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 414
 415     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 416     if (delegate != 0) {
 417         delegate->setMaximumSize(m_itemSize);
 418     }
 419
 420     if (m_selectionManager != 0) {
 421         m_selectionManager->reset();
 422     }
 423 }
 424
 425 int DolphinIconsView::additionalInfoCount() const
 426 {
 427     const DolphinView* view = m_controller->dolphinView();
 428     return view->additionalInfo().count();
 429 }
 430
 431 #include "dolphiniconsview.moc"