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