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 "draganddrophelper.h"
  27
  28 #include <kcategorizedsortfilterproxymodel.h>
  29 #include <kdialog.h>
  30 #include <kdirmodel.h>
  31
  32 #include <QAbstractProxyModel>
  33 #include <QApplication>
  34 #include <QPainter>
  35 #include <QPoint>
  36
  37 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  38     KCategorizedView(parent),
  39     m_controller(controller),
  40     m_categoryDrawer(0),
  41     m_font(),
  42     m_decorationSize(),
  43     m_decorationPosition(QStyleOptionViewItem::Top),
  44     m_displayAlignment(Qt::AlignHCenter),
  45     m_itemSize(),
  46     m_dragging(false),
  47     m_dropRect()
  48 {
  49     Q_ASSERT(controller != 0);
  50     setViewMode(QListView::IconMode);
  51     setResizeMode(QListView::Adjust);
  52     setSpacing(KDialog::spacingHint());
  53     setMovement(QListView::Static);
  54     setDragEnabled(true);
  55     viewport()->setAcceptDrops(true);
  56
  57     setMouseTracking(true);
  58     viewport()->setAttribute(Qt::WA_Hover);
  59
  60     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  61     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  62     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  63     // RETURN-key in keyPressEvent().
  64     if (KGlobalSettings::singleClick()) {
  65         connect(this, SIGNAL(clicked(const QModelIndex&)),
  66                 this, SLOT(triggerItem(const QModelIndex&)));
  67     } else {
  68         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  69                 this, SLOT(triggerItem(const QModelIndex&)));
  70     }
  71     connect(this, SIGNAL(viewportEntered()),
  72             controller, SLOT(emitViewportEntered()));
  73     connect(controller, SIGNAL(zoomIn()),
  74             this, SLOT(zoomIn()));
  75     connect(controller, SIGNAL(zoomOut()),
  76             this, SLOT(zoomOut()));
  77
  78     const DolphinView* view = controller->dolphinView();
  79     connect(view, SIGNAL(showPreviewChanged()),
  80             this, SLOT(slotShowPreviewChanged()));
  81     connect(view, SIGNAL(additionalInfoChanged()),
  82             this, SLOT(slotAdditionalInfoChanged()));
  83
  84     connect(this, SIGNAL(entered(const QModelIndex&)),
  85             this, SLOT(slotEntered(const QModelIndex&)));
  86
  87     // apply the icons mode settings to the widget
  88     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  89     Q_ASSERT(settings != 0);
  90
  91     m_font = QFont(settings->fontFamily(), settings->fontSize());
  92     m_font.setItalic(settings->italicFont());
  93     m_font.setBold(settings->boldFont());
  94
  95     setWordWrap(settings->numberOfTextlines() > 1);
  96     updateGridSize(view->showPreview(), 0);
  97
  98     if (settings->arrangement() == QListView::TopToBottom) {
  99         setFlow(QListView::LeftToRight);
 100         m_decorationPosition = QStyleOptionViewItem::Top;
 101         m_displayAlignment = Qt::AlignHCenter;
 102     } else {
 103         setFlow(QListView::TopToBottom);
 104         m_decorationPosition = QStyleOptionViewItem::Left;
 105         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 106     }
 107
 108     m_categoryDrawer = new DolphinCategoryDrawer();
 109     setCategoryDrawer(m_categoryDrawer);
 110
 111     setFocus();
 112 }
 113
 114 DolphinIconsView::~DolphinIconsView()
 115 {
 116     delete m_categoryDrawer;
 117     m_categoryDrawer = 0;
 118 }
 119
 120 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 121 {
 122     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 123
 124     QRect itemRect = KCategorizedView::visualRect(index);
 125
 126     const int maxWidth  = m_itemSize.width();
 127     const int maxHeight = m_itemSize.height();
 128
 129     if (itemRect.width() > maxWidth) {
 130         // assure that the maximum item width is not exceeded
 131         if (leftToRightFlow) {
 132             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 133             itemRect.setLeft(left);
 134         }
 135         itemRect.setWidth(maxWidth);
 136     }
 137
 138     if (itemRect.height() > maxHeight) {
 139         // assure that the maximum item height is not exceeded
 140         if (!leftToRightFlow) {
 141             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 142             itemRect.setTop(top);
 143         }
 144         itemRect.setHeight(maxHeight);
 145     }
 146
 147     KCategorizedSortFilterProxyModel* proxyModel = dynamic_cast<KCategorizedSortFilterProxyModel*>(model());
 148     if (leftToRightFlow && !proxyModel->isCategorizedModel()) {
 149         // TODO: QListView::visualRect() calculates a wrong position of the items under
 150         // certain circumstances (e. g. if the text is too long). This issue is bypassed
 151         // by the following code (I'll try create a patch for Qt but as Dolphin must also work with
 152         // Qt 4.3.0 this workaround must get applied at least for KDE 4.0).
 153         const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 154         const int margin = settings->gridSpacing();
 155         const int gridWidth = gridSize().width();
 156         const int gridIndex = (itemRect.left() - margin + 1) / gridWidth;
 157         const int centerInc = (maxWidth - itemRect.width()) / 2;
 158         itemRect.moveLeft((gridIndex * gridWidth) + margin + centerInc);
 159     }
 160
 161     return itemRect;
 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     if (!indexAt(event->pos()).isValid()) {
 185         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 186         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 187             clearSelection();
 188         }
 189     }
 190
 191     KCategorizedView::mousePressEvent(event);
 192 }
 193
 194 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 195 {
 196     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 197     // fix this in KDE 4.1
 198     KCategorizedView::startDrag(supportedActions);
 199     DragAndDropHelper::startDrag(this, supportedActions);
 200 }
 201
 202 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 203 {
 204     if (event->mimeData()->hasUrls()) {
 205         event->acceptProposedAction();
 206     }
 207     m_dragging = true;
 208 }
 209
 210 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 211 {
 212     KCategorizedView::dragLeaveEvent(event);
 213
 214     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 215     m_dragging = false;
 216     setDirtyRegion(m_dropRect);
 217 }
 218
 219 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 220 {
 221     KCategorizedView::dragMoveEvent(event);
 222
 223     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 224     const QModelIndex index = indexAt(event->pos());
 225     setDirtyRegion(m_dropRect);
 226
 227     m_dropRect.setSize(QSize()); // set as invalid
 228     if (index.isValid()) {
 229         const KFileItem item = itemForIndex(index);
 230         if (!item.isNull() && item.isDir()) {
 231             m_dropRect = visualRect(index);
 232         } else {
 233             m_dropRect.setSize(QSize()); // set as invalid
 234         }
 235     }
 236     if (event->mimeData()->hasUrls()) {
 237         // accept url drops, independently from the destination item
 238         event->acceptProposedAction();
 239     }
 240
 241     setDirtyRegion(m_dropRect);
 242 }
 243
 244 void DolphinIconsView::dropEvent(QDropEvent* event)
 245 {
 246     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 247         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 248         if (!urls.isEmpty()) {
 249             const QModelIndex index = indexAt(event->pos());
 250             const KFileItem item = itemForIndex(index);
 251             m_controller->indicateDroppedUrls(urls,
 252                                               m_controller->url(),
 253                                               item);
 254             event->acceptProposedAction();
 255         }
 256     }
 257
 258     KCategorizedView::dropEvent(event);
 259
 260     m_dragging = false;
 261 }
 262
 263 void DolphinIconsView::paintEvent(QPaintEvent* event)
 264 {
 265     KCategorizedView::paintEvent(event);
 266
 267     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 268     if (m_dragging) {
 269         const QBrush& brush = viewOptions().palette.brush(QPalette::Normal, QPalette::Highlight);
 270         DragAndDropHelper::drawHoverIndication(this, m_dropRect, brush);
 271     }
 272 }
 273
 274 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 275 {
 276     KCategorizedView::keyPressEvent(event);
 277
 278     const QItemSelectionModel* selModel = selectionModel();
 279     const QModelIndex currentIndex = selModel->currentIndex();
 280     const bool trigger = currentIndex.isValid()
 281                          && (event->key() == Qt::Key_Return)
 282                          && (selModel->selectedIndexes().count() <= 1);
 283     if (trigger) {
 284         triggerItem(currentIndex);
 285     }
 286 }
 287
 288 void DolphinIconsView::triggerItem(const QModelIndex& index)
 289 {
 290     m_controller->triggerItem(itemForIndex(index));
 291 }
 292
 293 void DolphinIconsView::slotEntered(const QModelIndex& index)
 294 {
 295     m_controller->emitItemEntered(itemForIndex(index));
 296 }
 297
 298 void DolphinIconsView::slotShowPreviewChanged()
 299 {
 300     const DolphinView* view = m_controller->dolphinView();
 301     updateGridSize(view->showPreview(), additionalInfoCount());
 302 }
 303
 304 void DolphinIconsView::slotAdditionalInfoChanged()
 305 {
 306     const DolphinView* view = m_controller->dolphinView();
 307     const bool showPreview = view->showPreview();
 308     updateGridSize(showPreview, view->additionalInfo().count());
 309 }
 310
 311 void DolphinIconsView::zoomIn()
 312 {
 313     if (isZoomInPossible()) {
 314         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 315
 316         const int oldIconSize = settings->iconSize();
 317         int newIconSize = oldIconSize;
 318
 319         const bool showPreview = m_controller->dolphinView()->showPreview();
 320         if (showPreview) {
 321             const int previewSize = increasedIconSize(settings->previewSize());
 322             settings->setPreviewSize(previewSize);
 323         } else {
 324             newIconSize = increasedIconSize(oldIconSize);
 325             settings->setIconSize(newIconSize);
 326             if (settings->previewSize() < newIconSize) {
 327                 // assure that the preview size is always >= the icon size
 328                 settings->setPreviewSize(newIconSize);
 329             }
 330         }
 331
 332         // increase also the grid size
 333         const int diff = newIconSize - oldIconSize;
 334         settings->setItemWidth(settings->itemWidth() + diff);
 335         settings->setItemHeight(settings->itemHeight() + diff);
 336
 337         updateGridSize(showPreview, additionalInfoCount());
 338     }
 339 }
 340
 341 void DolphinIconsView::zoomOut()
 342 {
 343     if (isZoomOutPossible()) {
 344         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 345
 346         const int oldIconSize = settings->iconSize();
 347         int newIconSize = oldIconSize;
 348
 349         const bool showPreview = m_controller->dolphinView()->showPreview();
 350         if (showPreview) {
 351             const int previewSize = decreasedIconSize(settings->previewSize());
 352             settings->setPreviewSize(previewSize);
 353             if (settings->iconSize() > previewSize) {
 354                 // assure that the icon size is always <= the preview size
 355                 newIconSize = previewSize;
 356                 settings->setIconSize(newIconSize);
 357             }
 358         } else {
 359             newIconSize = decreasedIconSize(settings->iconSize());
 360             settings->setIconSize(newIconSize);
 361         }
 362
 363         // decrease also the grid size
 364         const int diff = oldIconSize - newIconSize;
 365         settings->setItemWidth(settings->itemWidth() - diff);
 366         settings->setItemHeight(settings->itemHeight() - diff);
 367
 368         updateGridSize(showPreview, additionalInfoCount());
 369     }
 370 }
 371
 372 bool DolphinIconsView::isZoomInPossible() const
 373 {
 374     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 375     const bool showPreview = m_controller->dolphinView()->showPreview();
 376     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 377     return size < KIconLoader::SizeEnormous;
 378 }
 379
 380 bool DolphinIconsView::isZoomOutPossible() const
 381 {
 382     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 383     const bool showPreview = m_controller->dolphinView()->showPreview();
 384     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 385     return size > KIconLoader::SizeSmall;
 386 }
 387
 388 int DolphinIconsView::increasedIconSize(int size) const
 389 {
 390     int incSize = 0;
 391     switch (size) {
 392     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 393     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 394     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 395     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 396     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 397     default: Q_ASSERT(false); break;
 398     }
 399     return incSize;
 400 }
 401
 402 int DolphinIconsView::decreasedIconSize(int size) const
 403 {
 404     int decSize = 0;
 405     switch (size) {
 406     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 407     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 408     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 409     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 410     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 411     default: Q_ASSERT(false); break;
 412     }
 413     return decSize;
 414 }
 415
 416 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 417 {
 418     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 419     Q_ASSERT(settings != 0);
 420
 421     int itemWidth = settings->itemWidth();
 422     int itemHeight = settings->itemHeight();
 423     int size = settings->iconSize();
 424
 425     if (showPreview) {
 426         const int previewSize = settings->previewSize();
 427         const int diff = previewSize - size;
 428         Q_ASSERT(diff >= 0);
 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     } else {
 444         m_decorationSize = QSize(size, size);
 445     }
 446
 447     m_itemSize = QSize(itemWidth, itemHeight);
 448
 449     const int spacing = settings->gridSpacing();
 450     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 451
 452     m_controller->setZoomInPossible(isZoomInPossible());
 453     m_controller->setZoomOutPossible(isZoomOutPossible());
 454 }
 455
 456 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 457 {
 458     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 459     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 460     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 461     return dirModel->itemForIndex(dirIndex);
 462 }
 463
 464 int DolphinIconsView::additionalInfoCount() const
 465 {
 466     const DolphinView* view = m_controller->dolphinView();
 467     return view->additionalInfo().count();
 468 }
 469
 470 #include "dolphiniconsview.moc"