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
  26 #include "dolphin_iconsmodesettings.h"
  27
  28 #include <kdialog.h>
  29 #include <kdirmodel.h>
  30
  31 #include <QAbstractProxyModel>
  32 #include <QApplication>
  33 #include <QPainter>
  34 #include <QPoint>
  35
  36 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  37     KCategorizedView(parent),
  38     m_controller(controller),
  39     m_categoryDrawer(0),
  40     m_itemSize(),
  41     m_dragging(false),
  42     m_dropRect()
  43 {
  44     Q_ASSERT(controller != 0);
  45     setViewMode(QListView::IconMode);
  46     setResizeMode(QListView::Adjust);
  47     setSpacing(KDialog::spacingHint());
  48     setMouseTracking(true);
  49     viewport()->setAttribute(Qt::WA_Hover);
  50
  51     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  52     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  53     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  54     // RETURN-key in keyPressEvent().
  55     if (KGlobalSettings::singleClick()) {
  56         connect(this, SIGNAL(clicked(const QModelIndex&)),
  57                 this, SLOT(triggerItem(const QModelIndex&)));
  58     } else {
  59         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  60                 this, SLOT(triggerItem(const QModelIndex&)));
  61     }
  62     connect(this, SIGNAL(viewportEntered()),
  63             controller, SLOT(emitViewportEntered()));
  64     connect(controller, SIGNAL(zoomIn()),
  65             this, SLOT(zoomIn()));
  66     connect(controller, SIGNAL(zoomOut()),
  67             this, SLOT(zoomOut()));
  68
  69     const DolphinView* view = controller->dolphinView();
  70     connect(view, SIGNAL(showPreviewChanged()),
  71             this, SLOT(slotShowPreviewChanged()));
  72     connect(view, SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
  73             this, SLOT(slotAdditionalInfoChanged(const KFileItemDelegate::InformationList&)));
  74
  75     connect(this, SIGNAL(entered(const QModelIndex&)),
  76             this, SLOT(slotEntered(const QModelIndex&)));
  77
  78     // apply the icons mode settings to the widget
  79     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  80     Q_ASSERT(settings != 0);
  81
  82     m_viewOptions = KCategorizedView::viewOptions();
  83     m_viewOptions.showDecorationSelected = true;
  84
  85     QFont font(settings->fontFamily(), settings->fontSize());
  86     font.setItalic(settings->italicFont());
  87     font.setBold(settings->boldFont());
  88     m_viewOptions.font = font;
  89
  90     setWordWrap(settings->numberOfTextlines() > 1);
  91     updateGridSize(view->showPreview(), 0);
  92
  93     if (settings->arrangement() == QListView::TopToBottom) {
  94         setFlow(QListView::LeftToRight);
  95         m_viewOptions.decorationPosition = QStyleOptionViewItem::Top;
  96     } else {
  97         setFlow(QListView::TopToBottom);
  98         m_viewOptions.decorationPosition = QStyleOptionViewItem::Left;
  99         m_viewOptions.displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 100     }
 101
 102     m_categoryDrawer = new DolphinCategoryDrawer();
 103     setCategoryDrawer(m_categoryDrawer);
 104
 105     setFocus();
 106 }
 107
 108 DolphinIconsView::~DolphinIconsView()
 109 {
 110     delete m_categoryDrawer;
 111     m_categoryDrawer = 0;
 112 }
 113
 114 QRect DolphinIconsView::visualRect(const QModelIndex& index) const
 115 {
 116     const bool leftToRightFlow = (flow() == QListView::LeftToRight);
 117
 118     QRect itemRect = KCategorizedView::visualRect(index);
 119     const int maxWidth  = m_itemSize.width();
 120     const int maxHeight = m_itemSize.height();
 121
 122     if (itemRect.width() > maxWidth) {
 123         // assure that the maximum item width is not exceeded
 124         if (leftToRightFlow) {
 125             const int left = itemRect.left() + (itemRect.width() - maxWidth) / 2;
 126             itemRect.setLeft(left);
 127         }
 128         itemRect.setWidth(maxWidth);
 129     }
 130
 131     if (itemRect.height() > maxHeight) {
 132         // assure that the maximum item height is not exceeded
 133         if (!leftToRightFlow) {
 134             const int top = itemRect.top() + (itemRect.height() - maxHeight) / 2;
 135             itemRect.setTop(top);
 136         }
 137         itemRect.setHeight(maxHeight);
 138     }
 139
 140     return itemRect;
 141 }
 142
 143 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 144 {
 145     return m_viewOptions;
 146 }
 147
 148 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 149 {
 150     KCategorizedView::contextMenuEvent(event);
 151     m_controller->triggerContextMenuRequest(event->pos());
 152 }
 153
 154 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 155 {
 156     m_controller->requestActivation();
 157     if (!indexAt(event->pos()).isValid()) {
 158         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 159         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 160             clearSelection();
 161         }
 162     }
 163
 164     KCategorizedView::mousePressEvent(event);
 165 }
 166
 167 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 168 {
 169     if (event->mimeData()->hasUrls()) {
 170         event->acceptProposedAction();
 171     }
 172     m_dragging = true;
 173 }
 174
 175 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 176 {
 177     KCategorizedView::dragLeaveEvent(event);
 178
 179     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 180     m_dragging = false;
 181     setDirtyRegion(m_dropRect);
 182 }
 183
 184 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 185 {
 186     KCategorizedView::dragMoveEvent(event);
 187
 188     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 189     const QModelIndex index = indexAt(event->pos());
 190     setDirtyRegion(m_dropRect);
 191     if (itemForIndex(index).isDir()) {
 192         m_dropRect = visualRect(index);
 193     } else {
 194         m_dropRect.setSize(QSize()); // set as invalid
 195     }
 196     setDirtyRegion(m_dropRect);
 197 }
 198
 199 void DolphinIconsView::dropEvent(QDropEvent* event)
 200 {
 201     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 202         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 203         if (!urls.isEmpty()) {
 204             const QModelIndex index = indexAt(event->pos());
 205             const KFileItem item = itemForIndex(index);
 206             m_controller->indicateDroppedUrls(urls,
 207                                               m_controller->url(),
 208                                               item);
 209             event->acceptProposedAction();
 210         }
 211     }
 212
 213     KCategorizedView::dropEvent(event);
 214     m_dragging = false;
 215 }
 216
 217 void DolphinIconsView::paintEvent(QPaintEvent* event)
 218 {
 219     KCategorizedView::paintEvent(event);
 220
 221     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 222     if (m_dragging) {
 223         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 224         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 225     }
 226 }
 227
 228 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 229 {
 230     KCategorizedView::keyPressEvent(event);
 231
 232     const QItemSelectionModel* selModel = selectionModel();
 233     const QModelIndex currentIndex = selModel->currentIndex();
 234     const bool trigger = currentIndex.isValid()
 235                          && (event->key() == Qt::Key_Return)
 236                          && (selModel->selectedIndexes().count() <= 1);
 237     if (trigger) {
 238         triggerItem(currentIndex);
 239     }
 240 }
 241
 242 void DolphinIconsView::triggerItem(const QModelIndex& index)
 243 {
 244     m_controller->triggerItem(itemForIndex(index));
 245 }
 246
 247 void DolphinIconsView::slotEntered(const QModelIndex& index)
 248 {
 249     m_controller->emitItemEntered(itemForIndex(index));
 250 }
 251
 252 void DolphinIconsView::slotShowPreviewChanged()
 253 {
 254     const DolphinView* view = m_controller->dolphinView();
 255     const int infoCount = view->additionalInfo().count();
 256     updateGridSize(view->showPreview(), infoCount);
 257 }
 258
 259 void DolphinIconsView::slotAdditionalInfoChanged(const KFileItemDelegate::InformationList& info)
 260 {
 261     const bool showPreview = m_controller->dolphinView()->showPreview();
 262     updateGridSize(showPreview, info.count());
 263 }
 264
 265 void DolphinIconsView::zoomIn()
 266 {
 267     if (isZoomInPossible()) {
 268         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 269
 270         const int oldIconSize = settings->iconSize();
 271         int newIconSize = oldIconSize;
 272
 273         const bool showPreview = m_controller->dolphinView()->showPreview();
 274         if (showPreview) {
 275             const int previewSize = increasedIconSize(settings->previewSize());
 276             settings->setPreviewSize(previewSize);
 277         } else {
 278             newIconSize = increasedIconSize(oldIconSize);
 279             settings->setIconSize(newIconSize);
 280             if (settings->previewSize() < newIconSize) {
 281                 // assure that the preview size is always >= the icon size
 282                 settings->setPreviewSize(newIconSize);
 283             }
 284         }
 285
 286         // increase also the grid size
 287         const int diff = newIconSize - oldIconSize;
 288         settings->setItemWidth(settings->itemWidth() + diff);
 289         settings->setItemHeight(settings->itemHeight() + diff);
 290
 291         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 292         updateGridSize(showPreview, infoCount);
 293     }
 294 }
 295
 296 void DolphinIconsView::zoomOut()
 297 {
 298     if (isZoomOutPossible()) {
 299         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 300
 301         const int oldIconSize = settings->iconSize();
 302         int newIconSize = oldIconSize;
 303
 304         const bool showPreview = m_controller->dolphinView()->showPreview();
 305         if (showPreview) {
 306             const int previewSize = decreasedIconSize(settings->previewSize());
 307             settings->setPreviewSize(previewSize);
 308             if (settings->iconSize() > previewSize) {
 309                 // assure that the icon size is always <= the preview size
 310                 newIconSize = previewSize;
 311                 settings->setIconSize(newIconSize);
 312             }
 313         } else {
 314             newIconSize = decreasedIconSize(settings->iconSize());
 315             settings->setIconSize(newIconSize);
 316         }
 317
 318         // decrease also the grid size
 319         const int diff = oldIconSize - newIconSize;
 320         settings->setItemWidth(settings->itemWidth() - diff);
 321         settings->setItemHeight(settings->itemHeight() - diff);
 322
 323         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 324         updateGridSize(showPreview, infoCount);
 325     }
 326 }
 327
 328 bool DolphinIconsView::isZoomInPossible() const
 329 {
 330     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 331     const bool showPreview = m_controller->dolphinView()->showPreview();
 332     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 333     return size < KIconLoader::SizeEnormous;
 334 }
 335
 336 bool DolphinIconsView::isZoomOutPossible() const
 337 {
 338     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 339     const bool showPreview = m_controller->dolphinView()->showPreview();
 340     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 341     return size > KIconLoader::SizeSmall;
 342 }
 343
 344 int DolphinIconsView::increasedIconSize(int size) const
 345 {
 346     int incSize = 0;
 347     switch (size) {
 348     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 349     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 350     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 351     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 352     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 353     default: Q_ASSERT(false); break;
 354     }
 355     return incSize;
 356 }
 357
 358 int DolphinIconsView::decreasedIconSize(int size) const
 359 {
 360     int decSize = 0;
 361     switch (size) {
 362     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 363     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 364     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 365     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 366     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 367     default: Q_ASSERT(false); break;
 368     }
 369     return decSize;
 370 }
 371
 372 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 373 {
 374     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 375     Q_ASSERT(settings != 0);
 376
 377     int itemWidth = settings->itemWidth();
 378     int itemHeight = settings->itemHeight();
 379     int size = settings->iconSize();
 380
 381     if (showPreview) {
 382         const int previewSize = settings->previewSize();
 383         const int diff = previewSize - size;
 384         Q_ASSERT(diff >= 0);
 385         itemWidth  += diff;
 386         itemHeight += diff;
 387
 388         size = previewSize;
 389     }
 390
 391     Q_ASSERT(additionalInfoCount >= 0);
 392     itemHeight += additionalInfoCount * m_viewOptions.font.pointSize() * 2;
 393
 394     if (settings->arrangement() == QListView::TopToBottom) {
 395         // The decoration width indirectly defines the maximum
 396         // width for the text wrapping. To use the maximum item width
 397         // for text wrapping, it is used as decoration width.
 398         m_viewOptions.decorationSize = QSize(itemWidth, size);
 399     } else {
 400         m_viewOptions.decorationSize = QSize(size, size);
 401     }
 402
 403     const int spacing = settings->gridSpacing();
 404     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 405
 406     m_itemSize = QSize(itemWidth, itemHeight);
 407
 408     m_controller->setZoomInPossible(isZoomInPossible());
 409     m_controller->setZoomOutPossible(isZoomOutPossible());
 410 }
 411
 412 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 413 {
 414     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 415     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 416     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 417     return dirModel->itemForIndex(dirIndex);
 418 }
 419
 420
 421 #include "dolphiniconsview.moc"