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 "dolphin_generalsettings.h"
  27 #include "draganddrophelper.h"
  28 #include "selectionmanager.h"
  29
  30 #include <kcategorizedsortfilterproxymodel.h>
  31 #include <kdialog.h>
  32 #include <kdirmodel.h>
  33 #include <kfileitemdelegate.h>
  34
  35 #include <QAbstractProxyModel>
  36 #include <QApplication>
  37 #include <QPainter>
  38 #include <QPoint>
  39 #include <QScrollBar>
  40
  41 DolphinIconsView::DolphinIconsView(QWidget* parent, DolphinController* controller) :
  42     KCategorizedView(parent),
  43     m_controller(controller),
  44     m_categoryDrawer(0),
  45     m_font(),
  46     m_decorationSize(),
  47     m_decorationPosition(QStyleOptionViewItem::Top),
  48     m_displayAlignment(Qt::AlignHCenter),
  49     m_itemSize(),
  50     m_dropRect()
  51 {
  52     Q_ASSERT(controller != 0);
  53     setViewMode(QListView::IconMode);
  54     setResizeMode(QListView::Adjust);
  55     setSpacing(KDialog::spacingHint());
  56     setMovement(QListView::Static);
  57     setDragEnabled(true);
  58     viewport()->setAcceptDrops(true);
  59
  60     setMouseTracking(true);
  61
  62     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  63     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  64     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  65     // RETURN-key in keyPressEvent().
  66     if (KGlobalSettings::singleClick()) {
  67         connect(this, SIGNAL(clicked(const QModelIndex&)),
  68                 controller, SLOT(triggerItem(const QModelIndex&)));
  69         if (DolphinSettings::instance().generalSettings()->showSelectionToggle()) {
  70             SelectionManager* selManager = new SelectionManager(this);
  71             connect(selManager, SIGNAL(selectionChanged()),
  72                     this, SLOT(requestActivation()));
  73             connect(m_controller, SIGNAL(urlChanged(const KUrl&)),
  74                     selManager, SLOT(reset()));
  75         }
  76     } else {
  77         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  78                 controller, SLOT(triggerItem(const QModelIndex&)));
  79     }
  80     connect(this, SIGNAL(entered(const QModelIndex&)),
  81             controller, SLOT(emitItemEntered(const QModelIndex&)));
  82     connect(this, SIGNAL(viewportEntered()),
  83             controller, SLOT(emitViewportEntered()));
  84     connect(controller, SIGNAL(zoomIn()),
  85             this, SLOT(zoomIn()));
  86     connect(controller, SIGNAL(zoomOut()),
  87             this, SLOT(zoomOut()));
  88
  89     const DolphinView* view = controller->dolphinView();
  90     connect(view, SIGNAL(showPreviewChanged()),
  91             this, SLOT(slotShowPreviewChanged()));
  92     connect(view, SIGNAL(additionalInfoChanged()),
  93             this, SLOT(slotAdditionalInfoChanged()));
  94
  95     // apply the icons mode settings to the widget
  96     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
  97     Q_ASSERT(settings != 0);
  98
  99     if (settings->useSystemFont()) {
 100         m_font = KGlobalSettings::generalFont();
 101     } else {
 102         m_font = QFont(settings->fontFamily(),
 103                        settings->fontSize(),
 104                        settings->fontWeight(),
 105                        settings->italicFont());
 106     }
 107
 108     setWordWrap(settings->numberOfTextlines() > 1);
 109     updateGridSize(view->showPreview(), 0);
 110
 111     if (settings->arrangement() == QListView::TopToBottom) {
 112         setFlow(QListView::LeftToRight);
 113         m_decorationPosition = QStyleOptionViewItem::Top;
 114         m_displayAlignment = Qt::AlignHCenter;
 115     } else {
 116         setFlow(QListView::TopToBottom);
 117         m_decorationPosition = QStyleOptionViewItem::Left;
 118         m_displayAlignment = Qt::AlignLeft | Qt::AlignVCenter;
 119     }
 120
 121     m_categoryDrawer = new DolphinCategoryDrawer();
 122     setCategoryDrawer(m_categoryDrawer);
 123
 124     setFocus();
 125
 126     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 127             this, SLOT(updateFont()));
 128 }
 129
 130 DolphinIconsView::~DolphinIconsView()
 131 {
 132     delete m_categoryDrawer;
 133     m_categoryDrawer = 0;
 134 }
 135
 136 QStyleOptionViewItem DolphinIconsView::viewOptions() const
 137 {
 138     QStyleOptionViewItem viewOptions = KCategorizedView::viewOptions();
 139     viewOptions.font = m_font;
 140     viewOptions.decorationPosition = m_decorationPosition;
 141     viewOptions.decorationSize = m_decorationSize;
 142     viewOptions.displayAlignment = m_displayAlignment;
 143     viewOptions.showDecorationSelected = true;
 144     return viewOptions;
 145 }
 146
 147 void DolphinIconsView::contextMenuEvent(QContextMenuEvent* event)
 148 {
 149     KCategorizedView::contextMenuEvent(event);
 150     m_controller->triggerContextMenuRequest(event->pos());
 151 }
 152
 153 void DolphinIconsView::mousePressEvent(QMouseEvent* event)
 154 {
 155     m_controller->requestActivation();
 156     if (!indexAt(event->pos()).isValid()) {
 157         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 158         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 159             clearSelection();
 160         }
 161     }
 162
 163     KCategorizedView::mousePressEvent(event);
 164 }
 165
 166 void DolphinIconsView::startDrag(Qt::DropActions supportedActions)
 167 {
 168     // TODO: invoking KCategorizedView::startDrag() should not be necessary, we'll
 169     // fix this in KDE 4.1
 170     KCategorizedView::startDrag(supportedActions);
 171     DragAndDropHelper::startDrag(this, supportedActions);
 172 }
 173
 174 void DolphinIconsView::dragEnterEvent(QDragEnterEvent* event)
 175 {
 176     if (event->mimeData()->hasUrls()) {
 177         event->acceptProposedAction();
 178     }
 179 }
 180
 181 void DolphinIconsView::dragLeaveEvent(QDragLeaveEvent* event)
 182 {
 183     KCategorizedView::dragLeaveEvent(event);
 184     setDirtyRegion(m_dropRect);
 185 }
 186
 187 void DolphinIconsView::dragMoveEvent(QDragMoveEvent* event)
 188 {
 189     KCategorizedView::dragMoveEvent(event);
 190
 191     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 192     const QModelIndex index = indexAt(event->pos());
 193     setDirtyRegion(m_dropRect);
 194
 195     m_dropRect.setSize(QSize()); // set as invalid
 196     if (index.isValid()) {
 197         const KFileItem item = m_controller->itemForIndex(index);
 198         if (!item.isNull() && item.isDir()) {
 199             m_dropRect = visualRect(index);
 200         } else {
 201             m_dropRect.setSize(QSize()); // set as invalid
 202         }
 203     }
 204     if (event->mimeData()->hasUrls()) {
 205         // accept url drops, independently from the destination item
 206         event->acceptProposedAction();
 207     }
 208
 209     setDirtyRegion(m_dropRect);
 210 }
 211
 212 void DolphinIconsView::dropEvent(QDropEvent* event)
 213 {
 214     if (!selectionModel()->isSelected(indexAt(event->pos()))) {
 215         const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 216         if (!urls.isEmpty()) {
 217             const QModelIndex index = indexAt(event->pos());
 218             const KFileItem item = m_controller->itemForIndex(index);
 219             m_controller->indicateDroppedUrls(urls,
 220                                               m_controller->url(),
 221                                               item);
 222             event->acceptProposedAction();
 223         }
 224     }
 225
 226     KCategorizedView::dropEvent(event);
 227 }
 228
 229 void DolphinIconsView::keyPressEvent(QKeyEvent* event)
 230 {
 231     KCategorizedView::keyPressEvent(event);
 232     m_controller->handleKeyPressEvent(event);
 233 }
 234
 235 void DolphinIconsView::wheelEvent(QWheelEvent* event)
 236 {
 237     // let Ctrl+wheel events propagate to the DolphinView for icon zooming
 238     if (event->modifiers() & Qt::ControlModifier) {
 239         event->ignore();
 240         return;
 241     }
 242     KCategorizedView::wheelEvent(event);
 243     // if the icons are aligned left to right, the vertical wheel event should
 244     // be applied to the horizontal scrollbar
 245     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 246     const bool scrollHorizontal = (event->orientation() == Qt::Vertical) &&
 247                                   (settings->arrangement() == QListView::LeftToRight);
 248     if (scrollHorizontal) {
 249         QWheelEvent horizEvent(event->pos(),
 250                                event->delta(),
 251                                event->buttons(),
 252                                event->modifiers(),
 253                                Qt::Horizontal);
 254         QApplication::sendEvent(horizontalScrollBar(), &horizEvent);
 255     }
 256 }
 257
 258 void DolphinIconsView::showEvent(QShowEvent* event)
 259 {
 260     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 261     delegate->setMaximumSize(m_itemSize);
 262
 263     KCategorizedView::showEvent(event);
 264 }
 265
 266 void DolphinIconsView::slotShowPreviewChanged()
 267 {
 268     const DolphinView* view = m_controller->dolphinView();
 269     updateGridSize(view->showPreview(), additionalInfoCount());
 270 }
 271
 272 void DolphinIconsView::slotAdditionalInfoChanged()
 273 {
 274     const DolphinView* view = m_controller->dolphinView();
 275     const bool showPreview = view->showPreview();
 276     updateGridSize(showPreview, view->additionalInfo().count());
 277 }
 278
 279 void DolphinIconsView::zoomIn()
 280 {
 281     if (isZoomInPossible()) {
 282         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 283
 284         const int oldIconSize = settings->iconSize();
 285         int newIconSize = oldIconSize;
 286
 287         const bool showPreview = m_controller->dolphinView()->showPreview();
 288         if (showPreview) {
 289             const int previewSize = increasedIconSize(settings->previewSize());
 290             settings->setPreviewSize(previewSize);
 291         } else {
 292             newIconSize = increasedIconSize(oldIconSize);
 293             settings->setIconSize(newIconSize);
 294         }
 295
 296         // increase also the grid size
 297         const int diff = newIconSize - oldIconSize;
 298         settings->setItemWidth(settings->itemWidth() + diff);
 299         settings->setItemHeight(settings->itemHeight() + diff);
 300
 301         updateGridSize(showPreview, additionalInfoCount());
 302     }
 303 }
 304
 305 void DolphinIconsView::zoomOut()
 306 {
 307     if (isZoomOutPossible()) {
 308         IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 309
 310         const int oldIconSize = settings->iconSize();
 311         int newIconSize = oldIconSize;
 312
 313         const bool showPreview = m_controller->dolphinView()->showPreview();
 314         if (showPreview) {
 315             const int previewSize = decreasedIconSize(settings->previewSize());
 316             settings->setPreviewSize(previewSize);
 317         } else {
 318             newIconSize = decreasedIconSize(settings->iconSize());
 319             settings->setIconSize(newIconSize);
 320         }
 321
 322         // decrease also the grid size
 323         const int diff = oldIconSize - newIconSize;
 324         settings->setItemWidth(settings->itemWidth() - diff);
 325         settings->setItemHeight(settings->itemHeight() - diff);
 326
 327         updateGridSize(showPreview, additionalInfoCount());
 328     }
 329 }
 330
 331 void DolphinIconsView::requestActivation()
 332 {
 333     m_controller->requestActivation();
 334 }
 335
 336 void DolphinIconsView::updateFont()
 337 {
 338     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 339     Q_ASSERT(settings != 0);
 340
 341     if (settings->useSystemFont()) {
 342         m_font = KGlobalSettings::generalFont();
 343     }
 344 }
 345
 346 bool DolphinIconsView::isZoomInPossible() const
 347 {
 348     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 349     const bool showPreview = m_controller->dolphinView()->showPreview();
 350     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 351     return size < KIconLoader::SizeEnormous;
 352 }
 353
 354 bool DolphinIconsView::isZoomOutPossible() const
 355 {
 356     IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 357     const bool showPreview = m_controller->dolphinView()->showPreview();
 358     const int size = showPreview ? settings->previewSize() : settings->iconSize();
 359     return size > KIconLoader::SizeSmall;
 360 }
 361
 362 int DolphinIconsView::increasedIconSize(int size) const
 363 {
 364     int incSize = 0;
 365     switch (size) {
 366     case KIconLoader::SizeSmall:       incSize = KIconLoader::SizeSmallMedium; break;
 367     case KIconLoader::SizeSmallMedium: incSize = KIconLoader::SizeMedium; break;
 368     case KIconLoader::SizeMedium:      incSize = KIconLoader::SizeLarge; break;
 369     case KIconLoader::SizeLarge:       incSize = KIconLoader::SizeHuge; break;
 370     case KIconLoader::SizeHuge:        incSize = KIconLoader::SizeEnormous; break;
 371     default: Q_ASSERT(false); break;
 372     }
 373     return incSize;
 374 }
 375
 376 int DolphinIconsView::decreasedIconSize(int size) const
 377 {
 378     int decSize = 0;
 379     switch (size) {
 380     case KIconLoader::SizeSmallMedium: decSize = KIconLoader::SizeSmall; break;
 381     case KIconLoader::SizeMedium: decSize = KIconLoader::SizeSmallMedium; break;
 382     case KIconLoader::SizeLarge: decSize = KIconLoader::SizeMedium; break;
 383     case KIconLoader::SizeHuge: decSize = KIconLoader::SizeLarge; break;
 384     case KIconLoader::SizeEnormous: decSize = KIconLoader::SizeHuge; break;
 385     default: Q_ASSERT(false); break;
 386     }
 387     return decSize;
 388 }
 389
 390 void DolphinIconsView::updateGridSize(bool showPreview, int additionalInfoCount)
 391 {
 392     const IconsModeSettings* settings = DolphinSettings::instance().iconsModeSettings();
 393     Q_ASSERT(settings != 0);
 394
 395     int itemWidth = settings->itemWidth();
 396     int itemHeight = settings->itemHeight();
 397     int size = settings->iconSize();
 398
 399     if (showPreview) {
 400         const int previewSize = settings->previewSize();
 401         const int diff = previewSize - size;
 402         itemWidth  += diff;
 403         itemHeight += diff;
 404
 405         size = previewSize;
 406     }
 407
 408     Q_ASSERT(additionalInfoCount >= 0);
 409     itemHeight += additionalInfoCount * m_font.pointSize() * 2;
 410
 411     if (settings->arrangement() == QListView::TopToBottom) {
 412         // The decoration width indirectly defines the maximum
 413         // width for the text wrapping. To use the maximum item width
 414         // for text wrapping, it is used as decoration width.
 415         m_decorationSize = QSize(itemWidth, size);
 416         setIconSize(QSize(itemWidth, size));
 417     } else {
 418         m_decorationSize = QSize(size, size);
 419         setIconSize(QSize(size, size));
 420     }
 421
 422     m_itemSize = QSize(itemWidth, itemHeight);
 423
 424     const int spacing = settings->gridSpacing();
 425     setGridSize(QSize(itemWidth + spacing * 2, itemHeight + spacing));
 426
 427     m_controller->setZoomInPossible(isZoomInPossible());
 428     m_controller->setZoomOutPossible(isZoomOutPossible());
 429
 430     KFileItemDelegate* delegate = dynamic_cast<KFileItemDelegate*>(itemDelegate());
 431     if (delegate != 0) {
 432         delegate->setMaximumSize(m_itemSize);
 433     }
 434 }
 435
 436 int DolphinIconsView::additionalInfoCount() const
 437 {
 438     const DolphinView* view = m_controller->dolphinView();
 439     return view->additionalInfo().count();
 440 }
 441
 442 #include "dolphiniconsview.moc"