* viewer/help_dialog.cc: Update help message. * viewer/image_view.cc, * viewer/image_view.hh, * viewer/image_widget.cc, * viewer/image_widget.hh, * viewer/viewer.cc, * viewer/viewer.hh: Update colors. Improve cache usage (disabled when zoomed in). --- viewer/help_dialog.cc | 2 ++ viewer/image_view.cc | 30 ++++++++++++++++++++++++++++++ viewer/image_view.hh | 8 ++++++++ viewer/image_widget.cc | 6 +++++- viewer/image_widget.hh | 3 +++ viewer/viewer.cc | 38 +++++++++++++++++++++++--------------- viewer/viewer.hh | 5 +++-- 7 files changed, 74 insertions(+), 18 deletions(-) diff --git a/viewer/help_dialog.cc b/viewer/help_dialog.cc index ebdfdaa..fe59d93 100644 --- a/viewer/help_dialog.cc +++ b/viewer/help_dialog.cc @@ -33,6 +33,8 @@ HelpDialog::HelpDialog() " - If the document layout is present\n" " (XML file with the same name),\n" " select regions to display their properties.\n" + " - Use the mouse or keyboard to move and zoom\n" + " (Arrows, PageUp, PageDown, Home, End).\n" "\n" "Contact: d-halluin@lrde.epita.fr\n" "\n" diff --git a/viewer/image_view.cc b/viewer/image_view.cc index f017fe9..9182c1b 100644 --- a/viewer/image_view.cc +++ b/viewer/image_view.cc @@ -40,9 +40,39 @@ ImageView::wheelEvent(QWheelEvent* event) QPointF newCenter = QPointF (mouse.x() - dx / sc, mouse.y() - dy / sc); scale(sc, sc); + scaleUpdate(); } } +void +ImageView::keyPressEvent(QKeyEvent* event) +{ + if (event->key() == Qt::Key_PageUp) + scale(1.25, 1.25); + else if (event->key() == Qt::Key_PageDown) + scale(0.75, 0.75); + else if (event->key() == Qt::Key_Home) + resetMatrix(); + else if (event->key() == Qt::Key_End) + fitInView(sceneRect(), Qt::KeepAspectRatio); + else + { + QGraphicsView::keyPressEvent(event); + return; + } + scaleUpdate(); + event->accept(); +} + +void +ImageView::scaleUpdate() +{ + // Used to determine whether to change the main image cache mode. + QRect orig(0, 0, 10, 1); + QRectF scene = mapToScene(orig).boundingRect(); + emit scaleUpdated(10 / scene.width()); +} + ImageView::~ImageView() { } diff --git a/viewer/image_view.hh b/viewer/image_view.hh index d2e0058..84f722f 100644 --- a/viewer/image_view.hh +++ b/viewer/image_view.hh @@ -27,6 +27,14 @@ public: ~ImageView(); void wheelEvent(QWheelEvent* event); + void keyPressEvent(QKeyEvent *event); + + // Call after changing the scale. + void scaleUpdate(); + +signals: + // Scale is approximate. + void scaleUpdated(qreal scale); }; #endif /* !IMAGE_VIEW_HH_ */ diff --git a/viewer/image_widget.cc b/viewer/image_widget.cc index b8ac8c2..b4bee72 100644 --- a/viewer/image_widget.cc +++ b/viewer/image_widget.cc @@ -25,11 +25,14 @@ ImageWidget::ImageWidget(QGraphicsScene* scene) layout->addWidget(title); layout->addWidget(view_); - view_->setDragMode (QGraphicsView::ScrollHandDrag); + view_->setDragMode(QGraphicsView::ScrollHandDrag); view_->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view_->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); view_->setTransformationAnchor(QGraphicsView::AnchorUnderMouse); + connect(view_, SIGNAL(scaleUpdated(qreal)), + this, SIGNAL(scaleUpdated(qreal))); + setLayout(layout); } @@ -37,6 +40,7 @@ void ImageWidget::update() { view_->fitInView(view_->sceneRect(), Qt::KeepAspectRatio); + view_->scaleUpdate(); } ImageWidget::~ImageWidget() diff --git a/viewer/image_widget.hh b/viewer/image_widget.hh index 25a41a0..87259b0 100644 --- a/viewer/image_widget.hh +++ b/viewer/image_widget.hh @@ -31,6 +31,9 @@ public: public slots: void update(); +signals: + void scaleUpdated(qreal scale); + private: ImageView* view_; }; diff --git a/viewer/viewer.cc b/viewer/viewer.cc index 88d0525..ce9f850 100644 --- a/viewer/viewer.cc +++ b/viewer/viewer.cc @@ -34,15 +34,15 @@ Viewer::Viewer(int &argc, char** argv) files_(new QDirModel()), doc_layout_(0), key_map_(9), - alt_cache_(false) + no_cache_(false) { // Key map key_map_[region::Text] = qMakePair(tr("Text"), QColor(0, 200, 0)); key_map_[region::Image] = qMakePair(tr("Image"), QColor(255, 120, 0)); - key_map_[region::Noise] = qMakePair(tr("Noise"), QColor(114, 188, 144)); - key_map_[region::Separator] = qMakePair(tr("Separator"), QColor(200, 222, 0)); - key_map_[region::Table] = qMakePair(tr("Table"), QColor(0, 0, 255)); + key_map_[region::Noise] = qMakePair(tr("Noise"), QColor(43, 39, 128)); + key_map_[region::Separator] = qMakePair(tr("Separator"), QColor(0, 0, 255)); + key_map_[region::Table] = qMakePair(tr("Table"), QColor(220, 246, 0)); key_map_[region::LineDrawing] = qMakePair(tr("LineDrawing"), QColor(255, 198, 0)); key_map_[region::Graphic] = qMakePair(tr("Graphic"), QColor(255, 0, 144)); @@ -96,14 +96,13 @@ Viewer::Viewer(int &argc, char** argv) connect(fill_action_, SIGNAL(toggled(bool)), this, SIGNAL(setFill(bool))); option_menu->addAction(fill_action_); - QAction* cache_action = new QAction(tr("Alternative cache mode"), - option_menu); - cache_action->setStatusTip(tr("Much faster at low zoom, " - "but unstable at high zoom.")); + QAction* cache_action = new QAction(tr("Disable cache"), file_menu); + cache_action->setStatusTip(tr("Disable the image cache (useful for" + " large images).")); cache_action->setCheckable(true); cache_action->setChecked(false); connect(cache_action, SIGNAL(toggled(bool)), - this, SLOT(setAltCache(bool))); + this, SLOT(useCache(bool))); option_menu->addAction(cache_action); QMenu* help_menu = win_->menuBar()->addMenu(tr("Help")); @@ -168,6 +167,8 @@ Viewer::Viewer(int &argc, char** argv) xml_wgt, SLOT(select(QModelIndex))); connect(scene_, SIGNAL(deselected(QModelIndex)), xml_wgt, SLOT(deselect(QModelIndex))); + connect(image_wgt, SIGNAL(scaleUpdated(qreal)), + this, SLOT(maybeChangeCacheMode(qreal))); } void @@ -182,7 +183,6 @@ Viewer::load(QString filename) // OpenGL might speed up things a bit. image_ = new QGraphicsPixmapItem(QPixmap(filename)); image_->setShapeMode(QGraphicsPixmapItem::BoundingRectShape); - image_->setCacheMode(QGraphicsItem::ItemCoordinateCache, QSize()); image_->setZValue(0); scene_->addItem(image_); @@ -288,14 +288,22 @@ Viewer::help() } void -Viewer::setAltCache(bool b) +Viewer::maybeChangeCacheMode(qreal scale) { - alt_cache_ = b; + qDebug() << scale; if (image_) { - if (b) + if (scale >= 0.7) + image_->setCacheMode(QGraphicsItem::NoCache); + else if (!no_cache_) image_->setCacheMode(QGraphicsItem::DeviceCoordinateCache); - else - image_->setCacheMode(QGraphicsItem::ItemCoordinateCache); } } + +void +Viewer::useCache(bool b) +{ + no_cache_ = b; + if (b) + image_->setCacheMode(QGraphicsItem::NoCache); +} diff --git a/viewer/viewer.hh b/viewer/viewer.hh index 0a76afd..d579847 100644 --- a/viewer/viewer.hh +++ b/viewer/viewer.hh @@ -40,7 +40,8 @@ public slots: void load(QString filename); void help(); - void setAltCache(bool b); + void maybeChangeCacheMode(qreal scale); + void useCache(bool b); signals: void updated(DomModel* model); @@ -71,7 +72,7 @@ private: QMap<QString, int> region_ids_; region::KeyMap key_map_; - bool alt_cache_; + bool no_cache_; }; #include "viewer.hxx" -- 1.5.6.5