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->dolphinView(), SIGNAL(additionalInfoChanged(const KFileItemDelegate::InformationList&)),
  67             this, SLOT(slotAdditionalInfoChanged(const KFileItemDelegate::InformationList&)));
  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(), 0);
  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             const QModelIndex index = indexAt(event->pos());
 199             if (index.isValid()) {
 200                 const KFileItem item = itemForIndex(index);
 201                 m_controller->indicateDroppedUrls(urls,
 202                                                   m_controller->url(),
 203                                                   item,
 204                                                   event->source());
 205                 event->acceptProposedAction();
 206             }
 207         }
 208     }
 209
 210     KCategorizedView::dropEvent(event);
 211     m_dragging = false;
 212 }
 213
 214 void DolphinIconsView::paintEvent(QPaintEvent* event)
 215 {
 216     KCategorizedView::paintEvent(event);
 217
 218     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 219     if (m_dragging) {
 220         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 221         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 222     }
 223 }
 224
 225 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 226 {
 227     KCategorizedView::keyPressEvent(event);
 228
 229     const QItemSelectionModel* selModel = selectionModel();
 230     const QModelIndex currentIndex = selModel->currentIndex();
 231     const bool trigger = currentIndex.isValid()
 232                          && (event->key() == Qt::Key_Return)
 233                          && (selModel->selectedIndexes().count() <= 1);
 234     if (trigger) {
 235         triggerItem(currentIndex);
 236     }
 237 }
 238
 239 void DolphinIconsView::triggerItem(const QModelIndex& index)
 240 {
 241     m_controller->triggerItem(itemForIndex(index));
 242 }
 243
 244 void DolphinIconsView::slotEntered(const QModelIndex& index)
 245 {
 246     m_controller->emitItemEntered(itemForIndex(index));
 247 }
 248
 249 void DolphinIconsView::slotShowPreviewChanged(bool showPreview)
 250 {
 251     const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 252     updateGridSize(showPreview, infoCount);
 253 }
 254
 255 void DolphinIconsView::slotAdditionalInfoChanged(const KFileItemDelegate::InformationList& info)
 256 {
 257     updateGridSize(m_controller->showPreview(), info.count());
 258 }
 259
 260 void DolphinIconsView::zoomIn()
 261 {
 262     if (isZoomInPossible()) {
 263         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 264
 265         const int oldIconSize = settings->iconSize();
 266         int newIconSize = oldIconSize;
 267
 268         const bool showPreview = m_controller->showPreview();
 269         if (showPreview) {
 270             const int previewSize = increasedIconSize(settings->previewSize());
 271             settings->setPreviewSize(previewSize);
 272         } else {
 273             newIconSize = increasedIconSize(oldIconSize);
 274             settings->setIconSize(newIconSize);
 275             if (settings->previewSize() < newIconSize) {
 276                 // assure that the preview size is always >= the icon size
 277                 settings->setPreviewSize(newIconSize);
 278             }
 279         }
 280
 281         // increase also the grid size
 282         const int diff = newIconSize - oldIconSize;
 283         settings->setItemWidth(settings->itemWidth() + diff);
 284         settings->setItemHeight(settings->itemHeight() + diff);
 285
 286         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 287         updateGridSize(showPreview, infoCount);
 288     }
 289 }
 290
 291 void DolphinIconsView::zoomOut()
 292 {
 293     if (isZoomOutPossible()) {
 294         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 295
 296         const int oldIconSize = settings->iconSize();
 297         int newIconSize = oldIconSize;
 298
 299         const bool showPreview = m_controller->showPreview();
 300         if (showPreview) {
 301             const int previewSize = decreasedIconSize(settings->previewSize());
 302             settings->setPreviewSize(previewSize);
 303             if (settings->iconSize() > previewSize) {
 304                 // assure that the icon size is always <= the preview size
 305                 newIconSize = previewSize;
 306                 settings->setIconSize(newIconSize);
 307             }
 308         } else {
 309             newIconSize = decreasedIconSize(settings->iconSize());
 310             settings->setIconSize(newIconSize);
 311         }
 312
 313         // decrease also the grid size
 314         const int diff = oldIconSize - newIconSize;
 315         settings->setItemWidth(settings->itemWidth() - diff);
 316         settings->setItemHeight(settings->itemHeight() - diff);
 317
 318         const int infoCount = m_controller->dolphinView()->additionalInfo().count();
 319         updateGridSize(showPreview, infoCount);
 320     }
 321 }
 322
 323 bool DolphinIconsView::isZoomInPossible() const
 324 {
 325     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 326     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 327     return size < KIconLoader::SizeEnormous;
 328 }
 329
 330 bool DolphinIconsView::isZoomOutPossible() const
 331 {
 332     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 333     const int size = m_controller->showPreview() ? settings->previewSize() : settings->iconSize();
 334     return size > KIconLoader::SizeSmall;
 335 }
 336
 337 int DolphinIconsView::increasedIconSize(int size) const
 338 {
 339     int incSize = 0;
 340     switch (size) {
 341     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 342     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 343     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 344     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 345     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 346     default: Q_ASSERT(false); break;
 347     }
 348     return incSize;
 349 }
 350
 351 int DolphinIconsView::decreasedIconSize(int size) const
 352 {
 353     int decSize = 0;
 354     switch (size) {
 355     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 356     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 357     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 358     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 359     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 360     default: Q_ASSERT(false); break;
 361     }
 362     return decSize;
 363 }
 364
 365 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 366 {
 367     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 368     Q_ASSERT(settings != 0);
 369
 370     int itemWidth = settings->itemWidth();
 371     int itemHeight = settings->itemHeight();
 372     int size = settings->iconSize();
 373
 374     if (showPreview) {
 375         const int previewSize = settings->previewSize();
 376         const int diff = previewSize - size;
 377         Q_ASSERT(diff >= 0);
 378         itemWidth  += diff;
 379         itemHeight += diff;
 380
 381         size = previewSize;
 382     }
 383
 384     Q_ASSERT(additionalInfoCount >= 0);
 385     itemHeight += additionalInfoCount * m_viewOptions.font.pointSize() * 2;
 386
 387     if (settings->arrangement() == QListView::TopToBottom) {
 388         // The decoration width indirectly defines the maximum
 389         // width for the text wrapping. To use the maximum item width
 390         // for text wrapping, it is used as decoration width.
 391         m_viewOptions.decorationSize = QSize(itemWidth, size);
 392     } else {
 393         m_viewOptions.decorationSize = QSize(size, size);
 394     }
 395
 396     const int spacing = settings->gridSpacing();
 397     setGridSize(QSize(itemWidth + spacing, itemHeight + spacing));
 398
 399     m_itemSize = QSize(itemWidth, itemHeight);
 400
 401     m_controller->setZoomInPossible(isZoomInPossible());
 402     m_controller->setZoomOutPossible(isZoomOutPossible());
 403 }
 404
 405 KFileItem DolphinIconsView::itemForIndex(const QModelIndex& index) const
 406 {
 407     QAbstractProxyModel* proxyModel = static_cast<QAbstractProxyModel*>(model());
 408     KDirModel* dirModel = static_cast<KDirModel*>(proxyModel->sourceModel());
 409     const QModelIndex dirIndex = proxyModel->mapToSource(index);
 410     return dirModel->itemForIndex(dirIndex);
 411 }
 412
 413
 414 #include "dolphiniconsview.moc"