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     const QModelIndex index = indexAt(event->pos());
 171     if (index.isValid() && (event->button() == Qt::LeftButton)) {
 172         // TODO: It should not be necessary to manually set the dragging state, but I could
 173         // not reproduce this issue with a Qt-only example yet to find the root cause.
 174         // Issue description: start Dolphin, split the view and drag an item from the
 175         // inactive view to the active view by a very fast mouse movement. Result:
 176         // the item gets selected instead of being dragged...
 177         setState(QAbstractItemView::DraggingState);
 178     }
 179
 180     if (!index.isValid()) {
 181         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 182         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 183             clearSelection();
 184         }
 185     }
 186
 187     KCategorizedView::mousePressEvent(event);
 188 }
 189
 190 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 191 {
 192     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 193     // fix this in KDE 4.1
 194     KCategorizedView::startDrag(supportedActions);
 195     DragAndDropHelper::startDrag(this, supportedActions);
 196 }
 197
 198 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 199 {
 200     if (event->mimeData()->hasUrls()) {
 201         event->acceptProposedAction();
 202     }
 203 }
 204
 205 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 206 {
 207     KCategorizedView::dragLeaveEvent(event);
 208     setDirtyRegion(m_dropRect);
 209 }
 210
 211 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 212 {
 213     KCategorizedView::dragMoveEvent(event);
 214
 215     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 216     const QModelIndex index = indexAt(event->pos());
 217     setDirtyRegion(m_dropRect);
 218
 219     m_dropRect.setSize(QSize()); // set as invalid
 220     if (index.isValid()) {
 221         const KFileItem item = m_controller->itemForIndex(index);
 222         if (!item.isNull() && item.isDir()) {
 223             m_dropRect = visualRect(index);
 224         } else {
 225             m_dropRect.setSize(QSize()); // set as invalid
 226         }
 227     }
 228     if (event->mimeData()->hasUrls()) {
 229         // accept url drops, independently from the destination item
 230         event->acceptProposedAction();
 231     }
 232
 233     setDirtyRegion(m_dropRect);
 234 }
 235
 236 void DolphinIconsView::dropEvent(QDropEvent* event)
 237 {
 238     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 239         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 240         if (!urls.isEmpty()) {
 241             const QModelIndex index = indexAt(event->pos());
 242             const KFileItem item = m_controller->itemForIndex(index);
 243             m_controller->indicateDroppedUrls(urls,
 244                                               m_controller->url(),
 245                                               item);
 246             event->acceptProposedAction();
 247         }
 248     }
 249
 250     KCategorizedView::dropEvent(event);
 251 }
 252
 253 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 254 {
 255     KCategorizedView::keyPressEvent(event);
 256     m_controller->handleKeyPressEvent(event);
 257 }
 258
 259 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 260 {
 261     if (m_selectionManager != 0) {
 262         m_selectionManager->reset();
 263     }
 264
 265     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 266     if (event->modifiers() & Qt::ControlModifier) {
 267         event->ignore();
 268         return;
 269     }
 270     KCategorizedView::wheelEvent(event);
 271     // if the icons are aligned left to right, the vertical wheel event should
 272     // be applied to the horizontal scrollbar
 273     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 274     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 275                                   (settings->arrangement() == QListView::LeftToRight);
 276     if (scrollHorizontal) {
 277         QWheelEvent horizEvent(event->pos(),
 278                                event->delta(),
 279                                event->buttons(),
 280                                event->modifiers(),
 281                                Qt::Horizontal);
 282         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 283     }
 284 }
 285
 286 void DolphinIconsView::showEvent(QShowEvent* event)
 287 {
 288     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 289     delegate->setMaximumSize(m_itemSize);
 290
 291     KCategorizedView::showEvent(event);
 292 }
 293
 294 void DolphinIconsView::leaveEvent(QEvent* event)
 295 {
 296     KCategorizedView::leaveEvent(event);
 297     // if the mouse is above an item and moved very fast outside the widget,
 298     // no viewportEntered() signal might be emitted although the mouse has been moved
 299     // above the viewport
 300     m_controller->emitViewportEntered();
 301 }
 302
 303 void DolphinIconsView::slotShowPreviewChanged()
 304 {
 305     const DolphinView* view = m_controller->dolphinView();
 306     updateGridSize(view->showPreview(), additionalInfoCount());
 307 }
 308
 309 void DolphinIconsView::slotAdditionalInfoChanged()
 310 {
 311     const DolphinView* view = m_controller->dolphinView();
 312     const bool showPreview = view->showPreview();
 313     updateGridSize(showPreview, view->additionalInfo().count());
 314 }
 315
 316 void DolphinIconsView::zoomIn()
 317 {
 318     if (isZoomInPossible()) {
 319         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 320
 321         const int oldIconSize = settings->iconSize();
 322         int newIconSize = oldIconSize;
 323
 324         const bool showPreview = m_controller->dolphinView()->showPreview();
 325         if (showPreview) {
 326             const int previewSize = increasedIconSize(settings->previewSize());
 327             settings->setPreviewSize(previewSize);
 328         } else {
 329             newIconSize = increasedIconSize(oldIconSize);
 330             settings->setIconSize(newIconSize);
 331         }
 332
 333         // increase also the grid size
 334         const int diff = newIconSize - oldIconSize;
 335         settings->setItemWidth(settings->itemWidth() + diff);
 336         settings->setItemHeight(settings->itemHeight() + diff);
 337
 338         updateGridSize(showPreview, additionalInfoCount());
 339     }
 340 }
 341
 342 void DolphinIconsView::zoomOut()
 343 {
 344     if (isZoomOutPossible()) {
 345         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 346
 347         const int oldIconSize = settings->iconSize();
 348         int newIconSize = oldIconSize;
 349
 350         const bool showPreview = m_controller->dolphinView()->showPreview();
 351         if (showPreview) {
 352             const int previewSize = decreasedIconSize(settings->previewSize());
 353             settings->setPreviewSize(previewSize);
 354         } else {
 355             newIconSize = decreasedIconSize(settings->iconSize());
 356             settings->setIconSize(newIconSize);
 357         }
 358
 359         // decrease also the grid size
 360         const int diff = oldIconSize - newIconSize;
 361         settings->setItemWidth(settings->itemWidth() - diff);
 362         settings->setItemHeight(settings->itemHeight() - diff);
 363
 364         updateGridSize(showPreview, additionalInfoCount());
 365     }
 366 }
 367
 368 void DolphinIconsView::requestActivation()
 369 {
 370     m_controller->requestActivation();
 371 }
 372
 373 void DolphinIconsView::updateFont()
 374 {
 375     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 376     Q_ASSERT(settings != 0);
 377
 378     if (settings->useSystemFont()) {
 379         m_font = KGlobalSettings::generalFont();
 380     }
 381 }
 382
 383 bool DolphinIconsView::isZoomInPossible() const
 384 {
 385     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 386     const bool showPreview = m_controller->dolphinView()->showPreview();
 387     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 388     return size < KIconLoader::SizeEnormous;
 389 }
 390
 391 bool DolphinIconsView::isZoomOutPossible() const
 392 {
 393     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 394     const bool showPreview = m_controller->dolphinView()->showPreview();
 395     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 396     return size > KIconLoader::SizeSmall;
 397 }
 398
 399 int DolphinIconsView::increasedIconSize(int size) const
 400 {
 401     int incSize = 0;
 402     switch (size) {
 403     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 404     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 405     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 406     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 407     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 408     default: Q_ASSERT(false); break;
 409     }
 410     return incSize;
 411 }
 412
 413 int DolphinIconsView::decreasedIconSize(int size) const
 414 {
 415     int decSize = 0;
 416     switch (size) {
 417     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 418     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 419     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 420     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 421     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 422     default: Q_ASSERT(false); break;
 423     }
 424     return decSize;
 425 }
 426
 427 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 428 {
 429     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 430     Q_ASSERT(settings != 0);
 431
 432     int itemWidth = settings->itemWidth();
 433     int itemHeight = settings->itemHeight();
 434     int size = settings->iconSize();
 435
 436     if (showPreview) {
 437         const int previewSize = settings->previewSize();
 438         const int diff = previewSize - size;
 439         itemWidth  += diff;
 440         itemHeight += diff;
 441
 442         size = previewSize;
 443     }
 444
 445     Q_ASSERT(additionalInfoCount >= 0);
 446     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 447
 448     if (settings->arrangement() == QListView::TopToBottom) {
 449         // The decoration width indirectly defines the maximum
 450         // width for the text wrapping. To use the maximum item width
 451         // for text wrapping, it is used as decoration width.
 452         m_decorationSize = QSize(itemWidth, size);
 453         setIconSize(QSize(itemWidth, size));
 454     } else {
 455         m_decorationSize = QSize(size, size);
 456         setIconSize(QSize(size, size));
 457     }
 458
 459     m_itemSize = QSize(itemWidth, itemHeight);
 460
 461     const int spacing = settings->gridSpacing();
 462     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 463
 464     m_controller->setZoomInPossible(isZoomInPossible());
 465     m_controller->setZoomOutPossible(isZoomOutPossible());
 466
 467     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 468     if (delegate != 0) {
 469         delegate->setMaximumSize(m_itemSize);
 470     }
 471
 472     if (m_selectionManager != 0) {
 473         m_selectionManager->reset();
 474     }
 475 }
 476
 477 int DolphinIconsView::additionalInfoCount() const
 478 {
 479     const DolphinView* view = m_controller->dolphinView();
 480     return view->additionalInfo().count();
 481 }
 482
 483 #include "dolphiniconsview.moc"