Warning, file /office/calligra/libs/main/KoDocumentSectionView.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /*
   Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
 */
 #include "KoDocumentSectionView.h"
 #include "KoDocumentSectionPropertyAction_p.h"
 #include "KoDocumentSectionDelegate.h"
 #include "KoDocumentSectionModel.h"
 
 #include <kconfig.h>
 #include <kconfiggroup.h>
 #include <kiconloader.h>
 #include <ksharedconfig.h>
 
 #include <QContextMenuEvent>
 #include <QHeaderView>
 #include <QHelpEvent>
 #include <QMenu>
 #include <QDrag>
 #include <QMouseEvent>
 #include <QPersistentModelIndex>
 #include <QApplication>
 #include <QPainter>
 #include <QScrollBar>
 
 #ifdef HAVE_X11
 #define DRAG_WHILE_DRAG_WORKAROUND
 #endif
 
 #ifdef DRAG_WHILE_DRAG_WORKAROUND
 #define DRAG_WHILE_DRAG_WORKAROUND_START() d->isDragging = true
 #define DRAG_WHILE_DRAG_WORKAROUND_STOP() d->isDragging = false
 #else
 #define DRAG_WHILE_DRAG_WORKAROUND_START()
 #define DRAG_WHILE_DRAG_WORKAROUND_STOP()
 #endif
 
 
 class Q_DECL_HIDDEN KoDocumentSectionView::Private
 {
 public:
     Private()
         : delegate(0)
         , mode(DetailedMode)
 #ifdef DRAG_WHILE_DRAG_WORKAROUND
         , isDragging(false)
 #endif
     {
         KSharedConfigPtr config =  KSharedConfig::openConfig();
         KConfigGroup group = config->group("DocumentSectionView");
         mode = (DisplayMode) group.readEntry("DocumentSectionViewMode", (int)DetailedMode);
     }
     KoDocumentSectionDelegate *delegate;
     DisplayMode mode;
     QPersistentModelIndex hovered;
     QPoint lastPos;
 
 #ifdef DRAG_WHILE_DRAG_WORKAROUND
     bool isDragging;
 #endif
 };
 
 KoDocumentSectionView::KoDocumentSectionView(QWidget *parent)
     : QTreeView(parent)
     , m_draggingFlag(false)
     , d(new Private)
 {
     d->delegate = new KoDocumentSectionDelegate(this, this);
     setMouseTracking(true);
     setVerticalScrollMode(ScrollPerPixel);
     setSelectionMode(SingleSelection);
     setSelectionBehavior(SelectItems);
     header()->hide();
     setDragEnabled(true);
     setDragDropMode(QAbstractItemView::DragDrop);
     setAcceptDrops(true);
     setDropIndicatorShown(true);
 }
 
 KoDocumentSectionView::~KoDocumentSectionView()
 {
     delete d;
 }
 
 void KoDocumentSectionView::setDisplayMode(DisplayMode mode)
 {
     if (d->mode != mode) {
         d->mode = mode;
         KSharedConfigPtr config =  KSharedConfig::openConfig();
         KConfigGroup group = config->group("DocumentSectionView");
         group.writeEntry("DocumentSectionViewMode", (int)mode);
         scheduleDelayedItemsLayout();
     }
 }
 
 KoDocumentSectionView::DisplayMode KoDocumentSectionView::displayMode() const
 {
     return d->mode;
 }
 
 void KoDocumentSectionView::addPropertyActions(QMenu *menu, const QModelIndex &index)
 {
     Model::PropertyList list = index.data(Model::PropertiesRole).value<Model::PropertyList>();
     for (int i = 0, n = list.count(); i < n; ++i) {
         if (list.at(i).isMutable) {
             PropertyAction *a = new PropertyAction(i, list.at(i), index, menu);
             connect(a, SIGNAL(toggled(bool,QPersistentModelIndex,int)),
                     this, SLOT(slotActionToggled(bool,QPersistentModelIndex,int)));
             menu->addAction(a);
         }
     }
 }
 
 bool KoDocumentSectionView::viewportEvent(QEvent *e)
 {
     if (model()) {
         switch(e->type()) {
         case QEvent::MouseButtonPress: {
             DRAG_WHILE_DRAG_WORKAROUND_STOP();
 
             const QPoint pos = static_cast<QMouseEvent*>(e)->pos();
             d->lastPos = pos;
             if (!indexAt(pos).isValid()) {
                 return QTreeView::viewportEvent(e);
             }
             QModelIndex index = model()->buddy(indexAt(pos));
             if (d->delegate->editorEvent(e, model(), optionForIndex(index), index)) {
                 return true;
             }
         } break;
         case QEvent::Leave: {
             QEvent e(QEvent::Leave);
             d->delegate->editorEvent(&e, model(), optionForIndex(d->hovered), d->hovered);
             d->hovered = QModelIndex();
         } break;
         case QEvent::MouseMove: {
 #ifdef DRAG_WHILE_DRAG_WORKAROUND
             if (d->isDragging) {
                 return false;
             }
 #endif
 
             const QPoint pos = static_cast<QMouseEvent*>(e)->pos();
             QModelIndex hovered = indexAt(pos);
             if (hovered != d->hovered) {
                 if (d->hovered.isValid()) {
                     QEvent e(QEvent::Leave);
                     d->delegate->editorEvent(&e, model(), optionForIndex(d->hovered), d->hovered);
                 }
                 if (hovered.isValid()) {
                     QEvent e(QEvent::Enter);
                     d->delegate->editorEvent(&e, model(), optionForIndex(hovered), hovered);
                 }
                 d->hovered = hovered;
             }
             /* This is a workaround for a bug in QTreeView that immediately begins a dragging action
             when the mouse lands on the decoration/icon of a different index and moves 1 pixel or more */
             Qt::MouseButtons buttons = static_cast<QMouseEvent*>(e)->buttons();
             if ((Qt::LeftButton | Qt::MidButton) & buttons) {
                 if ((pos - d->lastPos).manhattanLength() > qApp->startDragDistance()) {
                     return QTreeView::viewportEvent(e);
                 }
                 return true;
             }
         } break;
         case QEvent::ToolTip: {
             const QPoint pos = static_cast<QHelpEvent*>(e)->pos();
             if (!indexAt(pos).isValid()) {
                 return QTreeView::viewportEvent(e);
             }
             QModelIndex index = model()->buddy(indexAt(pos));
             return d->delegate->editorEvent(e, model(), optionForIndex(index), index);
         } break;
         case QEvent::Resize: {
             scheduleDelayedItemsLayout();
             break;
         }
         default: break;
         }
     }
     return QTreeView::viewportEvent(e);
 }
 
 void KoDocumentSectionView::contextMenuEvent(QContextMenuEvent *e)
 {
     QTreeView::contextMenuEvent(e);
     QModelIndex i = indexAt(e->pos());
     if (model())
         i = model()->buddy(i);
     showContextMenu(e->globalPos(), i);
 }
 
 void KoDocumentSectionView::showContextMenu(const QPoint &globalPos, const QModelIndex &index)
 {
     emit contextMenuRequested(globalPos, index);
 }
 
 void KoDocumentSectionView::currentChanged(const QModelIndex &current, const QModelIndex &previous)
 {
     QTreeView::currentChanged(current, previous);
     if (current != previous /*&& current.isValid()*/) { //hack?
         Q_ASSERT(!current.isValid() || current.model() == model());
         model()->setData(current, true, Model::ActiveRole);
     }
 }
 
 void KoDocumentSectionView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles)
 {
     Q_UNUSED(roles);
     QTreeView::dataChanged(topLeft, bottomRight);
     for (int x = topLeft.row(); x <= bottomRight.row(); ++x) {
         for (int y = topLeft.column(); y <= bottomRight.column(); ++y) {
             if (topLeft.sibling(x, y).data(Model::ActiveRole).toBool()) {
                 setCurrentIndex(topLeft.sibling(x, y));
                 return;
             }
         }
     }
 }
 
 void KoDocumentSectionView::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
 {
     QTreeView::selectionChanged(selected, deselected);
     emit selectionChanged(selectedIndexes());
 
 }
 
 void KoDocumentSectionView::slotActionToggled(bool on, const QPersistentModelIndex &index, int num)
 {
     Model::PropertyList list = index.data(Model::PropertiesRole).value<Model::PropertyList>();
     list[num].state = on;
     const_cast<QAbstractItemModel*>(index.model())->setData(index, QVariant::fromValue(list), Model::PropertiesRole);
 }
 
 QStyleOptionViewItem KoDocumentSectionView::optionForIndex(const QModelIndex &index) const
 {
     QStyleOptionViewItem option = viewOptions();
     option.rect = visualRect(index);
     if (index == currentIndex())
         option.state |= QStyle::State_HasFocus;
     return option;
 }
 
 void KoDocumentSectionView::startDrag(Qt::DropActions supportedActions)
 {
     DRAG_WHILE_DRAG_WORKAROUND_START();
 
     if (displayMode() == KoDocumentSectionView::ThumbnailMode) {
         const QModelIndexList indexes = selectionModel()->selectedIndexes();
         if (!indexes.isEmpty()) {
             QMimeData *data = model()->mimeData(indexes);
             if (!data) {
                 return;
             }
             QDrag *drag = new QDrag(this);
             drag->setPixmap(createDragPixmap());
             drag->setMimeData(data);
             //m_dragSource = this;
             drag->exec(supportedActions);
         }
     }
     else {
         QTreeView::startDrag(supportedActions);
     }
 }
 
 QPixmap KoDocumentSectionView::createDragPixmap() const
 {
     const QModelIndexList selectedIndexes = selectionModel()->selectedIndexes();
     Q_ASSERT(!selectedIndexes.isEmpty());
 
     const int itemCount = selectedIndexes.count();
 
     // If more than one item is dragged, align the items inside a
     // rectangular grid. The maximum grid size is limited to 4 x 4 items.
     int xCount = 2;
     int size = 96;
     if (itemCount > 9) {
         xCount = 4;
         size = KIconLoader::SizeLarge;
     }
     else if (itemCount > 4) {
         xCount = 3;
         size = KIconLoader::SizeHuge;
     }
     else if (itemCount < xCount) {
         xCount = itemCount;
     }
 
     int yCount = itemCount / xCount;
     if (itemCount % xCount != 0) {
         ++yCount;
     }
 
     if (yCount > xCount) {
         yCount = xCount;
     }
 
     // Draw the selected items into the grid cells
     QPixmap dragPixmap(xCount * size + xCount - 1, yCount * size + yCount - 1);
     dragPixmap.fill(Qt::transparent);
 
     QPainter painter(&dragPixmap);
     int x = 0;
     int y = 0;
     foreach (const QModelIndex &selectedIndex, selectedIndexes) {
         const QImage img = selectedIndex.data(int(Model::BeginThumbnailRole) + size).value<QImage>();
         painter.drawPixmap(x, y, QPixmap().fromImage(img.scaled(QSize(size, size), Qt::KeepAspectRatio)));
 
         x += size + 1;
         if (x >= dragPixmap.width()) {
             x = 0;
             y += size + 1;
         }
         if (y >= dragPixmap.height()) {
             break;
         }
     }
 
     return dragPixmap;
 }
 
 void KoDocumentSectionView::paintEvent(QPaintEvent *event)
 {
     event->accept();
     QTreeView::paintEvent(event);
 
     // Paint the line where the slide should go
     if (isDragging() && (displayMode() == KoDocumentSectionView::ThumbnailMode)) {
         QSize size(visualRect(model()->index(0, 0, QModelIndex())).width(), visualRect(model()->index(0, 0, QModelIndex())).height());
         int numberRow = cursorPageIndex();
         int scrollBarValue = verticalScrollBar()->value();
 
         QPoint point1(0, numberRow * size.height() - scrollBarValue);
         QPoint point2(size.width(), numberRow * size.height() - scrollBarValue);
         QLineF line(point1, point2);
 
         QPainter painter(this->viewport());
         QPen pen = QPen(palette().brush(QPalette::Highlight), 8);
         pen.setCapStyle(Qt::RoundCap);
         painter.setPen(pen);
         painter.setOpacity(0.8);
         painter.drawLine(line);
     }
 }
 
 void KoDocumentSectionView::dropEvent(QDropEvent *ev)
 {
     if (displayMode() == KoDocumentSectionView::ThumbnailMode) {
         setDraggingFlag(false);
         ev->accept();
         clearSelection();
 
         if (!model()) {
             return;
         }
 
         int newIndex = cursorPageIndex();
         model()->dropMimeData(ev->mimeData(), ev->dropAction(), newIndex, -1, QModelIndex());
         return;
     }
     QTreeView::dropEvent(ev);
 
     DRAG_WHILE_DRAG_WORKAROUND_STOP();
 }
 
 int KoDocumentSectionView::cursorPageIndex() const
 {
     QSize size(visualRect(model()->index(0, 0, QModelIndex())).width(), visualRect(model()->index(0, 0, QModelIndex())).height());
     int scrollBarValue = verticalScrollBar()->value();
 
     QPoint cursorPosition = QWidget::mapFromGlobal(QCursor::pos());
 
     int numberRow = (cursorPosition.y() + scrollBarValue) / size.height();
 
     //If cursor is at the half button of the page then the move action is performed after the slide, otherwise it is
     //performed before the page
     if (abs((cursorPosition.y() + scrollBarValue) - size.height()*numberRow) > (size.height()/2)) {
         numberRow++;
     }
 
     if (numberRow > model()->rowCount(QModelIndex())) {
         numberRow = model()->rowCount(QModelIndex());
     }
 
     return numberRow;
 }
 
 void KoDocumentSectionView::dragEnterEvent(QDragEnterEvent *ev)
 {
     DRAG_WHILE_DRAG_WORKAROUND_START();
     QTreeView::dragEnterEvent(ev);
 }
 
 void KoDocumentSectionView::dragMoveEvent(QDragMoveEvent *ev)
 {
     DRAG_WHILE_DRAG_WORKAROUND_START();
 
     if (displayMode() == KoDocumentSectionView::ThumbnailMode) {
         ev->accept();
         if (!model()) {
             return;
         }
         QTreeView::dragMoveEvent(ev);
         setDraggingFlag();
         viewport()->update();
         return;
     }
     QTreeView::dragMoveEvent(ev);
 }
 
 void KoDocumentSectionView::dragLeaveEvent(QDragLeaveEvent *e)
 {
     if (displayMode() == KoDocumentSectionView::ThumbnailMode) {
         setDraggingFlag(false);
     } else {
         QTreeView::dragLeaveEvent(e);
     }
 
     DRAG_WHILE_DRAG_WORKAROUND_STOP();
 }
 
 bool KoDocumentSectionView::isDragging() const
 {
     return m_draggingFlag;
 }
 
 void KoDocumentSectionView::setDraggingFlag(bool flag)
 {
     m_draggingFlag = flag;
 }