apps/dolphin/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 "settings/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     setMovement(QListView::Static);
  60     setDragEnabled(true);
  61     setEditTriggers(QAbstractItemView::NoEditTriggers);
  62     viewport()->setAcceptDrops(true);
  63
  64     setMouseTracking(true);
  65     m_autoScroller = new DolphinViewAutoScroller(this);
  66
  67     connect(this, SIGNAL(clicked(const QModelIndex&)),
  68             controller, SLOT(requestTab(const QModelIndex&)));
  69     if (KGlobalSettings::singleClick()) {
  70         connect(this, SIGNAL(clicked(const QModelIndex&)),
  71                 controller, SLOT(triggerItem(const QModelIndex&)));
  72     } else {
  73         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  74                 controller, SLOT(triggerItem(const QModelIndex&)));
  75     }
  76
  77     if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  78         m_selectionManager = new SelectionManager(this);
  79         connect(m_selectionManager, SIGNAL(selectionChanged()),
  80                 this, SLOT(requestActivation()));
  81         connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  82                 m_selectionManager, SLOT(reset()));
  83     }
  84
  85     connect(this, SIGNAL(entered(const QModelIndex&)),
  86             controller, SLOT(emitItemEntered(const QModelIndex&)));
  87     connect(this, SIGNAL(viewportEntered()),
  88             controller, SLOT(emitViewportEntered()));
  89     connect(controller, SIGNAL(zoomLevelChanged(int)),
  90             this, SLOT(setZoomLevel(int)));
  91
  92     const DolphinView* view = controller->dolphinView();
  93     connect(view, SIGNAL(showPreviewChanged()),
  94             this, SLOT(slotShowPreviewChanged()));
  95     connect(view, SIGNAL(additionalInfoChanged()),
  96             this, SLOT(slotAdditionalInfoChanged()));
  97
  98     // apply the icons mode settings to the widget
  99     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 100     Q_ASSERT(settings != 0);
 101
 102     if (settings->useSystemFont()) {
 103         m_font = KGlobalSettings::generalFont();
 104     } else {
 105         m_font = QFont(settings->fontFamily(),
 106                        settings->fontSize(),
 107                        settings->fontWeight(),
 108                        settings->italicFont());
 109     }
 110
 111     setWordWrap(settings->numberOfTextlines() > 1);
 112     updateGridSize(view->showPreview(), 0);
 113
 114     if (settings->arrangement() == QListView::TopToBottom) {
 115         setFlow(QListView::LeftToRight);
 116         m_decorationPosition = QStyleOptionViewItem::Top;
 117         m_displayAlignment = Qt::AlignHCenter;
 118     } else {
 119         setFlow(QListView::TopToBottom);
 120         m_decorationPosition = QStyleOptionViewItem::Left;
 121         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 122     }
 123
 124     m_categoryDrawer = new DolphinCategoryDrawer();
 125     setCategoryDrawer(m_categoryDrawer);
 126
 127     setFocus();
 128
 129     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 130             this, SLOT(updateFont()));
 131 }
 132
 133 DolphinIconsView::~DolphinIconsView()
 134 {
 135     delete m_categoryDrawer;
 136     m_categoryDrawer = 0;
 137 }
 138
 139 void DolphinIconsView::scrollTo(const QModelIndex& index, ScrollHint hint)
 140 {
 141     // Enable the QListView implementation of scrollTo() only if it has been
 142     // triggered by a key press. Otherwise QAbstractItemView wants to scroll to the current
 143     // index each time the layout has been changed. This becomes an issue when
 144     // previews are loaded and the scrollbar is used: the scrollbar will always
 145     // be reset to 0 on each new preview.
 146     if (m_enableScrollTo || (state() != QAbstractItemView::NoState)) {
 147         KCategorizedView::scrollTo(index, hint);
 148         m_enableScrollTo = false;
 149     }
 150 }
 151
 152 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 153 {
 154     KCategorizedView::dataChanged(topLeft, bottomRight);
 155
 156     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 157     if (!proxyModel->isCategorizedModel()) {
 158         // bypass a QListView issue that items are not layout correctly if the decoration size of
 159         // an index changes
 160         scheduleDelayedItemsLayout();
 161     }
 162 }
 163
 164 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 165 {
 166     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 167     viewOptions.font = m_font;
 168     viewOptions.decorationPosition = m_decorationPosition;
 169     viewOptions.decorationSize = m_decorationSize;
 170     viewOptions.displayAlignment = m_displayAlignment;
 171     viewOptions.showDecorationSelected = true;
 172     return viewOptions;
 173 }
 174
 175 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 176 {
 177     KCategorizedView::contextMenuEvent(event);
 178     m_controller->triggerContextMenuRequest(event->pos());
 179 }
 180
 181 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 182 {
 183     m_controller->requestActivation();
 184     const QModelIndex index = indexAt(event->pos());
 185     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 186         // TODO: It should not be necessary to manually set the dragging state, but I could
 187         // not reproduce this issue with a Qt-only example yet to find the root cause.
 188         // Issue description: start Dolphin, split the view and drag an item from the
 189         // inactive view to the active view by a very fast mouse movement. Result:
 190         // the item gets selected instead of being dragged...
 191         setState(QAbstractItemView::DraggingState);
 192     }
 193
 194     if (!index.isValid()) {
 195         if (QApplication::mouseButtons() & Qt::MidButton) {
 196             m_controller->replaceUrlByClipboard();
 197         }
 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::instance().startDrag(this, supportedActions, m_controller);
 213 }
 214
 215 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 216 {
 217     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 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 (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 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     const QModelIndex index = indexAt(event->pos());
 256     const KFileItem item = m_controller->itemForIndex(index);
 257     m_controller->indicateDroppedUrls(item, m_controller->url(), event);
 258
 259     KCategorizedView::dropEvent(event);
 260 }
 261
 262 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 263 {
 264     m_enableScrollTo = true; // see DolphinIconsView::scrollTo()
 265     KCategorizedView::keyPressEvent(event);
 266     m_controller->handleKeyPressEvent(event);
 267 }
 268
 269 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 270 {
 271     if (m_selectionManager != 0) {
 272         m_selectionManager->reset();
 273     }
 274
 275     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 276     if (event->modifiers() & Qt::ControlModifier) {
 277         event->ignore();
 278         return;
 279     }
 280
 281     horizontalScrollBar()->setSingleStep(m_itemSize.width() / 10);
 282     verticalScrollBar()->setSingleStep(m_itemSize.height() / 10);
 283
 284     KCategorizedView::wheelEvent(event);
 285     // if the icons are aligned left to right, the vertical wheel event should
 286     // be applied to the horizontal scrollbar
 287     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 288     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 289                                   (settings->arrangement() == QListView::LeftToRight);
 290     if (scrollHorizontal) {
 291         QWheelEvent horizEvent(event->pos(),
 292                                event->delta(),
 293                                event->buttons(),
 294                                event->modifiers(),
 295                                Qt::Horizontal);
 296         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 297     }
 298 }
 299
 300 void DolphinIconsView::showEvent(QShowEvent* event)
 301 {
 302     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 303     delegate->setMaximumSize(m_itemSize);
 304
 305     KCategorizedView::showEvent(event);
 306 }
 307
 308 void DolphinIconsView::leaveEvent(QEvent* event)
 309 {
 310     KCategorizedView::leaveEvent(event);
 311     // if the mouse is above an item and moved very fast outside the widget,
 312     // no viewportEntered() signal might be emitted although the mouse has been moved
 313     // above the viewport
 314     m_controller->emitViewportEntered();
 315 }
 316
 317 void DolphinIconsView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 318 {
 319     KCategorizedView::currentChanged(current, previous);
 320     if (current.isValid() && !m_autoScroller->isActive()) {
 321         scrollTo(current);
 322     }
 323 }
 324
 325 void DolphinIconsView::resizeEvent(QResizeEvent* event)
 326 {
 327     KCategorizedView::resizeEvent(event);
 328     const DolphinView* view = m_controller->dolphinView();
 329     updateGridSize(view->showPreview(), view->additionalInfo().count());
 330 }
 331
 332 void DolphinIconsView::slotShowPreviewChanged()
 333 {
 334     const DolphinView* view = m_controller->dolphinView();
 335     updateGridSize(view->showPreview(), additionalInfoCount());
 336 }
 337
 338 void DolphinIconsView::slotAdditionalInfoChanged()
 339 {
 340     const DolphinView* view = m_controller->dolphinView();
 341     const bool showPreview = view->showPreview();
 342     updateGridSize(showPreview, view->additionalInfo().count());
 343 }
 344
 345 void DolphinIconsView::setZoomLevel(int level)
 346 {
 347     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 348
 349     const int oldIconSize = settings->iconSize();
 350     int newIconSize = oldIconSize;
 351
 352     const bool showPreview = m_controller->dolphinView()->showPreview();
 353     if (showPreview) {
 354         const int previewSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 355         settings->setPreviewSize(previewSize);
 356     } else {
 357         newIconSize = ZoomLevelInfo::iconSizeForZoomLevel(level);
 358         settings->setIconSize(newIconSize);
 359     }
 360
 361     // increase also the grid size
 362     const int diff = newIconSize - oldIconSize;
 363     settings->setItemWidth(settings->itemWidth() + diff);
 364     settings->setItemHeight(settings->itemHeight() + diff);
 365
 366     updateGridSize(showPreview, additionalInfoCount());
 367 }
 368
 369 void DolphinIconsView::requestActivation()
 370 {
 371     m_controller->requestActivation();
 372 }
 373
 374 void DolphinIconsView::updateFont()
 375 {
 376     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 377     Q_ASSERT(settings != 0);
 378
 379     if (settings->useSystemFont()) {
 380         m_font = KGlobalSettings::generalFont();
 381     }
 382 }
 383
 384 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 385 {
 386     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 387     Q_ASSERT(settings != 0);
 388
 389     int itemWidth = settings->itemWidth();
 390     int itemHeight = settings->itemHeight();
 391     int size = settings->iconSize();
 392
 393     if (showPreview) {
 394         const int previewSize = settings->previewSize();
 395         const int diff = previewSize - size;
 396         itemWidth  += diff;
 397         itemHeight += diff;
 398
 399         size = previewSize;
 400     }
 401
 402     Q_ASSERT(additionalInfoCount >= 0);
 403     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 404
 405     // optimize the item size of the grid in a way to prevent large gaps on the
 406     // right border (= row arrangement) or the bottom border (= column arrangement)
 407     const int spacing = settings->gridSpacing();
 408     if (settings->arrangement() == QListView::TopToBottom) {
 409         const int contentWidth = viewport()->width() - 1 -
 410                                  style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, horizontalScrollBar());
 411         const int gridWidth = itemWidth + spacing * 2;
 412         const int horizItemCount = contentWidth / gridWidth;
 413         if (horizItemCount > 0) {
 414             itemWidth += (contentWidth - horizItemCount * gridWidth) / horizItemCount;
 415         }
 416
 417         // The decoration width indirectly defines the maximum
 418         // width for the text wrapping. To use the maximum item width
 419         // for text wrapping, it is used as decoration width.
 420         m_decorationSize = QSize(itemWidth, size);
 421         setIconSize(QSize(itemWidth, size));
 422     } else {
 423         const int contentHeight = viewport()->height() - 1 -
 424                                   style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, verticalScrollBar());
 425         const int gridHeight = itemHeight + spacing;
 426         const int vertItemCount = contentHeight / gridHeight;
 427         if (vertItemCount > 0) {
 428             itemHeight += (contentHeight - vertItemCount * gridHeight) / vertItemCount;
 429         }
 430
 431         m_decorationSize = QSize(size, size);
 432         setIconSize(QSize(size, size));
 433     }
 434
 435     m_itemSize = QSize(itemWidth, itemHeight);
 436     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 437
 438     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 439     if (delegate != 0) {
 440         delegate->setMaximumSize(m_itemSize);
 441     }
 442
 443     if (m_selectionManager != 0) {
 444         m_selectionManager->reset();
 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"