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_selectionManager(0),
  45     m_categoryDrawer(0),
  46     m_font(),
  47     m_decorationSize(),
  48     m_decorationPosition(QStyleOptionViewItem::Top),
  49     m_displayAlignment(Qt::AlignHCenter),
  50     m_itemSize(),
  51     m_dropRect()
  52 {
  53     Q_ASSERT(controller != 0);
  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         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  72             m_selectionManager = new SelectionManager(this);
  73             connect(m_selectionManager, SIGNAL(selectionChanged()),
  74                     this, SLOT(requestActivation()));
  75             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  76                     m_selectionManager, SLOT(reset()));
  77         }
  78     } else {
  79         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  80                 controller, SLOT(triggerItem(const QModelIndex&)));
  81     }
  82     connect(this, SIGNAL(entered(const QModelIndex&)),
  83             controller, SLOT(emitItemEntered(const QModelIndex&)));
  84     connect(this, SIGNAL(viewportEntered()),
  85             controller, SLOT(emitViewportEntered()));
  86     connect(controller, SIGNAL(zoomIn()),
  87             this, SLOT(zoomIn()));
  88     connect(controller, SIGNAL(zoomOut()),
  89             this, SLOT(zoomOut()));
  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     Q_UNUSED(index);
 141     Q_UNUSED(hint);
 142     // Disable the QListView implementation of scrollTo(), as QAbstractItemView
 143     // wants to scroll to the current index each time the layout has been changed.
 144     // This becomes an issue when previews are loaded and the scrollbar is used: the
 145     // scrollbar will always be reset to 0 on each new preview.
 146 }
 147
 148 void DolphinIconsView::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 149 {
 150     KCategorizedView::dataChanged(topLeft, bottomRight);
 151
 152     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 153     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 154         // bypass a QListView issue that items are not layout correctly if the decoration size of
 155         // an index changes
 156         scheduleDelayedItemsLayout();
 157     }
 158 }
 159
 160 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 161 {
 162     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 163     viewOptions.font = m_font;
 164     viewOptions.decorationPosition = m_decorationPosition;
 165     viewOptions.decorationSize = m_decorationSize;
 166     viewOptions.displayAlignment = m_displayAlignment;
 167     viewOptions.showDecorationSelected = true;
 168     return viewOptions;
 169 }
 170
 171 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 172 {
 173     KCategorizedView::contextMenuEvent(event);
 174     m_controller->triggerContextMenuRequest(event->pos());
 175 }
 176
 177 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 178 {
 179     m_controller->requestActivation();
 180     const QModelIndex index = indexAt(event->pos());
 181     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 182         // TODO: It should not be necessary to manually set the dragging state, but I could
 183         // not reproduce this issue with a Qt-only example yet to find the root cause.
 184         // Issue description: start Dolphin, split the view and drag an item from the
 185         // inactive view to the active view by a very fast mouse movement. Result:
 186         // the item gets selected instead of being dragged...
 187         setState(QAbstractItemView::DraggingState);
 188     }
 189
 190     if (!index.isValid()) {
 191         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 192         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 193             clearSelection();
 194         }
 195     }
 196
 197     KCategorizedView::mousePressEvent(event);
 198 }
 199
 200 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 201 {
 202     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 203     // fix this in KDE 4.1
 204     KCategorizedView::startDrag(supportedActions);
 205     DragAndDropHelper::startDrag(this, supportedActions);
 206 }
 207
 208 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 209 {
 210     if (event->mimeData()->hasUrls()) {
 211         event->acceptProposedAction();
 212     }
 213 }
 214
 215 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 216 {
 217     KCategorizedView::dragLeaveEvent(event);
 218     setDirtyRegion(m_dropRect);
 219 }
 220
 221 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 222 {
 223     KCategorizedView::dragMoveEvent(event);
 224
 225     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 226     const QModelIndex index = indexAt(event->pos());
 227     setDirtyRegion(m_dropRect);
 228
 229     m_dropRect.setSize(QSize()); // set as invalid
 230     if (index.isValid()) {
 231         const KFileItem item = m_controller->itemForIndex(index);
 232         if (!item.isNull() && item.isDir()) {
 233             m_dropRect = visualRect(index);
 234         } else {
 235             m_dropRect.setSize(QSize()); // set as invalid
 236         }
 237     }
 238     if (event->mimeData()->hasUrls()) {
 239         // accept url drops, independently from the destination item
 240         event->acceptProposedAction();
 241     }
 242
 243     setDirtyRegion(m_dropRect);
 244 }
 245
 246 void DolphinIconsView::dropEvent(QDropEvent* event)
 247 {
 248     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 249         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 250         if (!urls.isEmpty()) {
 251             const QModelIndex index = indexAt(event->pos());
 252             const KFileItem item = m_controller->itemForIndex(index);
 253             m_controller->indicateDroppedUrls(urls,
 254                                               m_controller->url(),
 255                                               item);
 256             event->acceptProposedAction();
 257         }
 258     }
 259
 260     KCategorizedView::dropEvent(event);
 261 }
 262
 263 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 264 {
 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     KCategorizedView::wheelEvent(event);
 281     // if the icons are aligned left to right, the vertical wheel event should
 282     // be applied to the horizontal scrollbar
 283     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 284     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 285                                   (settings->arrangement() == QListView::LeftToRight);
 286     if (scrollHorizontal) {
 287         QWheelEvent horizEvent(event->pos(),
 288                                event->delta(),
 289                                event->buttons(),
 290                                event->modifiers(),
 291                                Qt::Horizontal);
 292         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 293     }
 294 }
 295
 296 void DolphinIconsView::showEvent(QShowEvent* event)
 297 {
 298     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 299     delegate->setMaximumSize(m_itemSize);
 300
 301     KCategorizedView::showEvent(event);
 302 }
 303
 304 void DolphinIconsView::leaveEvent(QEvent* event)
 305 {
 306     KCategorizedView::leaveEvent(event);
 307     // if the mouse is above an item and moved very fast outside the widget,
 308     // no viewportEntered() signal might be emitted although the mouse has been moved
 309     // above the viewport
 310     m_controller->emitViewportEntered();
 311 }
 312
 313 void DolphinIconsView::slotShowPreviewChanged()
 314 {
 315     const DolphinView* view = m_controller->dolphinView();
 316     updateGridSize(view->showPreview(), additionalInfoCount());
 317 }
 318
 319 void DolphinIconsView::slotAdditionalInfoChanged()
 320 {
 321     const DolphinView* view = m_controller->dolphinView();
 322     const bool showPreview = view->showPreview();
 323     updateGridSize(showPreview, view->additionalInfo().count());
 324 }
 325
 326 void DolphinIconsView::zoomIn()
 327 {
 328     if (isZoomInPossible()) {
 329         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 330
 331         const int oldIconSize = settings->iconSize();
 332         int newIconSize = oldIconSize;
 333
 334         const bool showPreview = m_controller->dolphinView()->showPreview();
 335         if (showPreview) {
 336             const int previewSize = increasedIconSize(settings->previewSize());
 337             settings->setPreviewSize(previewSize);
 338         } else {
 339             newIconSize = increasedIconSize(oldIconSize);
 340             settings->setIconSize(newIconSize);
 341         }
 342
 343         // increase also the grid size
 344         const int diff = newIconSize - oldIconSize;
 345         settings->setItemWidth(settings->itemWidth() + diff);
 346         settings->setItemHeight(settings->itemHeight() + diff);
 347
 348         updateGridSize(showPreview, additionalInfoCount());
 349     }
 350 }
 351
 352 void DolphinIconsView::zoomOut()
 353 {
 354     if (isZoomOutPossible()) {
 355         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 356
 357         const int oldIconSize = settings->iconSize();
 358         int newIconSize = oldIconSize;
 359
 360         const bool showPreview = m_controller->dolphinView()->showPreview();
 361         if (showPreview) {
 362             const int previewSize = decreasedIconSize(settings->previewSize());
 363             settings->setPreviewSize(previewSize);
 364         } else {
 365             newIconSize = decreasedIconSize(settings->iconSize());
 366             settings->setIconSize(newIconSize);
 367         }
 368
 369         // decrease also the grid size
 370         const int diff = oldIconSize - newIconSize;
 371         settings->setItemWidth(settings->itemWidth() - diff);
 372         settings->setItemHeight(settings->itemHeight() - diff);
 373
 374         updateGridSize(showPreview, additionalInfoCount());
 375     }
 376 }
 377
 378 void DolphinIconsView::requestActivation()
 379 {
 380     m_controller->requestActivation();
 381 }
 382
 383 void DolphinIconsView::updateFont()
 384 {
 385     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 386     Q_ASSERT(settings != 0);
 387
 388     if (settings->useSystemFont()) {
 389         m_font = KGlobalSettings::generalFont();
 390     }
 391 }
 392
 393 bool DolphinIconsView::isZoomInPossible() const
 394 {
 395     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 396     const bool showPreview = m_controller->dolphinView()->showPreview();
 397     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 398     return size < KIconLoader::SizeEnormous;
 399 }
 400
 401 bool DolphinIconsView::isZoomOutPossible() const
 402 {
 403     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 404     const bool showPreview = m_controller->dolphinView()->showPreview();
 405     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 406     return size > KIconLoader::SizeSmall;
 407 }
 408
 409 int DolphinIconsView::increasedIconSize(int size) const
 410 {
 411     int incSize = 0;
 412     switch (size) {
 413     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 414     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 415     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 416     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 417     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 418     default: Q_ASSERT(false); break;
 419     }
 420     return incSize;
 421 }
 422
 423 int DolphinIconsView::decreasedIconSize(int size) const
 424 {
 425     int decSize = 0;
 426     switch (size) {
 427     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 428     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 429     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 430     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 431     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 432     default: Q_ASSERT(false); break;
 433     }
 434     return decSize;
 435 }
 436
 437 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 438 {
 439     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 440     Q_ASSERT(settings != 0);
 441
 442     int itemWidth = settings->itemWidth();
 443     int itemHeight = settings->itemHeight();
 444     int size = settings->iconSize();
 445
 446     if (showPreview) {
 447         const int previewSize = settings->previewSize();
 448         const int diff = previewSize - size;
 449         itemWidth  += diff;
 450         itemHeight += diff;
 451
 452         size = previewSize;
 453     }
 454
 455     Q_ASSERT(additionalInfoCount >= 0);
 456     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 457
 458     if (settings->arrangement() == QListView::TopToBottom) {
 459         // The decoration width indirectly defines the maximum
 460         // width for the text wrapping. To use the maximum item width
 461         // for text wrapping, it is used as decoration width.
 462         m_decorationSize = QSize(itemWidth, size);
 463         setIconSize(QSize(itemWidth, size));
 464     } else {
 465         m_decorationSize = QSize(size, size);
 466         setIconSize(QSize(size, size));
 467     }
 468
 469     m_itemSize = QSize(itemWidth, itemHeight);
 470
 471     const int spacing = settings->gridSpacing();
 472     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 473
 474     m_controller->setZoomInPossible(isZoomInPossible());
 475     m_controller->setZoomOutPossible(isZoomOutPossible());
 476
 477     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 478     if (delegate != 0) {
 479         delegate->setMaximumSize(m_itemSize);
 480     }
 481
 482     if (m_selectionManager != 0) {
 483         m_selectionManager->reset();
 484     }
 485 }
 486
 487 int DolphinIconsView::additionalInfoCount() const
 488 {
 489     const DolphinView* view = m_controller->dolphinView();
 490     return view->additionalInfo().count();
 491 }
 492
 493 #include "dolphiniconsview.moc"