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