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