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::dataChanged(const QModelIndex& topLeft, const QModelIndex& bottomRight)
 139 {
 140     KCategorizedView::dataChanged(topLeft, bottomRight);
 141
 142     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 143     if ((flow() == QListView::LeftToRight) && !proxyModel->isCategorizedModel()) {
 144         // bypass a QListView issue that items are not layout correctly if the decoration size of
 145         // an index changes
 146         scheduleDelayedItemsLayout();
 147     }
 148 }
 149
 150 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 151 {
 152     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 153     viewOptions.font = m_font;
 154     viewOptions.decorationPosition = m_decorationPosition;
 155     viewOptions.decorationSize = m_decorationSize;
 156     viewOptions.displayAlignment = m_displayAlignment;
 157     viewOptions.showDecorationSelected = true;
 158     return viewOptions;
 159 }
 160
 161 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 162 {
 163     KCategorizedView::contextMenuEvent(event);
 164     m_controller->triggerContextMenuRequest(event->pos());
 165 }
 166
 167 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 168 {
 169     m_controller->requestActivation();
 170     if (!indexAt(event->pos()).isValid()) {
 171         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 172         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 173             clearSelection();
 174         }
 175     }
 176
 177     KCategorizedView::mousePressEvent(event);
 178 }
 179
 180 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 181 {
 182     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 183     // fix this in KDE 4.1
 184     KCategorizedView::startDrag(supportedActions);
 185     DragAndDropHelper::startDrag(this, supportedActions);
 186 }
 187
 188 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 189 {
 190     if (event->mimeData()->hasUrls()) {
 191         event->acceptProposedAction();
 192     }
 193 }
 194
 195 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 196 {
 197     KCategorizedView::dragLeaveEvent(event);
 198     setDirtyRegion(m_dropRect);
 199 }
 200
 201 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 202 {
 203     KCategorizedView::dragMoveEvent(event);
 204
 205     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 206     const QModelIndex index = indexAt(event->pos());
 207     setDirtyRegion(m_dropRect);
 208
 209     m_dropRect.setSize(QSize()); // set as invalid
 210     if (index.isValid()) {
 211         const KFileItem item = m_controller->itemForIndex(index);
 212         if (!item.isNull() && item.isDir()) {
 213             m_dropRect = visualRect(index);
 214         } else {
 215             m_dropRect.setSize(QSize()); // set as invalid
 216         }
 217     }
 218     if (event->mimeData()->hasUrls()) {
 219         // accept url drops, independently from the destination item
 220         event->acceptProposedAction();
 221     }
 222
 223     setDirtyRegion(m_dropRect);
 224 }
 225
 226 void DolphinIconsView::dropEvent(QDropEvent* event)
 227 {
 228     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 229         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 230         if (!urls.isEmpty()) {
 231             const QModelIndex index = indexAt(event->pos());
 232             const KFileItem item = m_controller->itemForIndex(index);
 233             m_controller->indicateDroppedUrls(urls,
 234                                               m_controller->url(),
 235                                               item);
 236             event->acceptProposedAction();
 237         }
 238     }
 239
 240     KCategorizedView::dropEvent(event);
 241 }
 242
 243 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 244 {
 245     KCategorizedView::keyPressEvent(event);
 246     m_controller->handleKeyPressEvent(event);
 247 }
 248
 249 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 250 {
 251     if (m_selectionManager != 0) {
 252         m_selectionManager->reset();
 253     }
 254
 255     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 256     if (event->modifiers() & Qt::ControlModifier) {
 257         event->ignore();
 258         return;
 259     }
 260     KCategorizedView::wheelEvent(event);
 261     // if the icons are aligned left to right, the vertical wheel event should
 262     // be applied to the horizontal scrollbar
 263     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 264     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 265                                   (settings->arrangement() == QListView::LeftToRight);
 266     if (scrollHorizontal) {
 267         QWheelEvent horizEvent(event->pos(),
 268                                event->delta(),
 269                                event->buttons(),
 270                                event->modifiers(),
 271                                Qt::Horizontal);
 272         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 273     }
 274 }
 275
 276 void DolphinIconsView::showEvent(QShowEvent* event)
 277 {
 278     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 279     delegate->setMaximumSize(m_itemSize);
 280
 281     KCategorizedView::showEvent(event);
 282 }
 283
 284 void DolphinIconsView::leaveEvent(QEvent* event)
 285 {
 286     KCategorizedView::leaveEvent(event);
 287     // if the mouse is above an item and moved very fast outside the widget,
 288     // no viewportEntered() signal might be emitted although the mouse has been moved
 289     // above the viewport
 290     m_controller->emitViewportEntered();
 291 }
 292
 293 void DolphinIconsView::slotShowPreviewChanged()
 294 {
 295     const DolphinView* view = m_controller->dolphinView();
 296     updateGridSize(view->showPreview(), additionalInfoCount());
 297 }
 298
 299 void DolphinIconsView::slotAdditionalInfoChanged()
 300 {
 301     const DolphinView* view = m_controller->dolphinView();
 302     const bool showPreview = view->showPreview();
 303     updateGridSize(showPreview, view->additionalInfo().count());
 304 }
 305
 306 void DolphinIconsView::zoomIn()
 307 {
 308     if (isZoomInPossible()) {
 309         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 310
 311         const int oldIconSize = settings->iconSize();
 312         int newIconSize = oldIconSize;
 313
 314         const bool showPreview = m_controller->dolphinView()->showPreview();
 315         if (showPreview) {
 316             const int previewSize = increasedIconSize(settings->previewSize());
 317             settings->setPreviewSize(previewSize);
 318         } else {
 319             newIconSize = increasedIconSize(oldIconSize);
 320             settings->setIconSize(newIconSize);
 321         }
 322
 323         // increase also the grid size
 324         const int diff = newIconSize - oldIconSize;
 325         settings->setItemWidth(settings->itemWidth() + diff);
 326         settings->setItemHeight(settings->itemHeight() + diff);
 327
 328         updateGridSize(showPreview, additionalInfoCount());
 329     }
 330 }
 331
 332 void DolphinIconsView::zoomOut()
 333 {
 334     if (isZoomOutPossible()) {
 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 = decreasedIconSize(settings->previewSize());
 343             settings->setPreviewSize(previewSize);
 344         } else {
 345             newIconSize = decreasedIconSize(settings->iconSize());
 346             settings->setIconSize(newIconSize);
 347         }
 348
 349         // decrease also the grid size
 350         const int diff = oldIconSize - newIconSize;
 351         settings->setItemWidth(settings->itemWidth() - diff);
 352         settings->setItemHeight(settings->itemHeight() - diff);
 353
 354         updateGridSize(showPreview, additionalInfoCount());
 355     }
 356 }
 357
 358 void DolphinIconsView::requestActivation()
 359 {
 360     m_controller->requestActivation();
 361 }
 362
 363 void DolphinIconsView::updateFont()
 364 {
 365     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 366     Q_ASSERT(settings != 0);
 367
 368     if (settings->useSystemFont()) {
 369         m_font = KGlobalSettings::generalFont();
 370     }
 371 }
 372
 373 bool DolphinIconsView::isZoomInPossible() const
 374 {
 375     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 376     const bool showPreview = m_controller->dolphinView()->showPreview();
 377     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 378     return size < KIconLoader::SizeEnormous;
 379 }
 380
 381 bool DolphinIconsView::isZoomOutPossible() const
 382 {
 383     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 384     const bool showPreview = m_controller->dolphinView()->showPreview();
 385     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 386     return size > KIconLoader::SizeSmall;
 387 }
 388
 389 int DolphinIconsView::increasedIconSize(int size) const
 390 {
 391     int incSize = 0;
 392     switch (size) {
 393     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 394     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 395     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 396     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 397     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 398     default: Q_ASSERT(false); break;
 399     }
 400     return incSize;
 401 }
 402
 403 int DolphinIconsView::decreasedIconSize(int size) const
 404 {
 405     int decSize = 0;
 406     switch (size) {
 407     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 408     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 409     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 410     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 411     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 412     default: Q_ASSERT(false); break;
 413     }
 414     return decSize;
 415 }
 416
 417 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 418 {
 419     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 420     Q_ASSERT(settings != 0);
 421
 422     int itemWidth = settings->itemWidth();
 423     int itemHeight = settings->itemHeight();
 424     int size = settings->iconSize();
 425
 426     if (showPreview) {
 427         const int previewSize = settings->previewSize();
 428         const int diff = previewSize - size;
 429         itemWidth  += diff;
 430         itemHeight += diff;
 431
 432         size = previewSize;
 433     }
 434
 435     Q_ASSERT(additionalInfoCount >= 0);
 436     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 437
 438     if (settings->arrangement() == QListView::TopToBottom) {
 439         // The decoration width indirectly defines the maximum
 440         // width for the text wrapping. To use the maximum item width
 441         // for text wrapping, it is used as decoration width.
 442         m_decorationSize = QSize(itemWidth, size);
 443         setIconSize(QSize(itemWidth, size));
 444     } else {
 445         m_decorationSize = QSize(size, size);
 446         setIconSize(QSize(size, size));
 447     }
 448
 449     m_itemSize = QSize(itemWidth, itemHeight);
 450
 451     const int spacing = settings->gridSpacing();
 452     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 453
 454     m_controller->setZoomInPossible(isZoomInPossible());
 455     m_controller->setZoomOutPossible(isZoomOutPossible());
 456
 457     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 458     if (delegate != 0) {
 459         delegate->setMaximumSize(m_itemSize);
 460     }
 461
 462     if (m_selectionManager != 0) {
 463         m_selectionManager->reset();
 464     }
 465 }
 466
 467 int DolphinIconsView::additionalInfoCount() const
 468 {
 469     const DolphinView* view = m_controller->dolphinView();
 470     return view->additionalInfo().count();
 471 }
 472
 473 #include "dolphiniconsview.moc"