--- /dev/null
+// Copyright (C) 2013-2023 CEA, EDF, OPEN CASCADE
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+//
+
+#include "QtViewer_ViewPort.h"
+#include "QtViewer_Scene.h"
+#include <QGraphicsItem>
+#include <QRubberBand>
+#include <QMouseEvent>
+#include <QCursor>
+#include <QScrollBar>
+#include <QPainter>
+#include <QPrinter>
+
+#include "SUIT_ResourceMgr.h"
+#include "SUIT_Session.h"
+
+#include "QtViewer_PainterObject.h"
+
+//=======================================================================
+// Name : QtViewer_ViewPort
+// Purpose : Constructor
+//=======================================================================
+QtViewer_ViewPort::QtViewer_ViewPort( QWidget* theParent )
+: QGraphicsView( theParent )
+{
+ setScene(new QtViewer_Scene(this));
+
+ setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+ setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
+ setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
+
+ setMouseTracking( true );
+ setFocusPolicy( Qt::StrongFocus );
+
+ myFitAllGap = 40;
+
+ myRectBand = nullptr;
+ myRectBandStart = QPoint();
+ myRectBandEnd = QPoint();
+ fittingArea = false;
+
+ zooming = false;
+ previousPos = QPoint();
+
+ panning = false;
+ globalPanning = false;
+
+ SUIT_ResourceMgr* rmgr = SUIT_Session::session()->resourceMgr();
+ zoomCursor = new QCursor( rmgr->loadPixmap( "QtViewer", tr( "ICON_QTV_CURSOR_ZOOM" ) ) );
+}
+
+//=======================================================================
+// Name : QtViewer_ViewPort
+// Purpose : Destructor
+//=======================================================================
+QtViewer_ViewPort::~QtViewer_ViewPort()
+{
+ delete zoomCursor;
+ zoomCursor = nullptr;
+}
+
+void QtViewer_ViewPort::resetForeground()
+{
+ for (QSharedPointer<QtViewer_PainterObject> obj : foregroundObjects)
+ obj.reset();
+
+ foregroundObjects.clear();
+}
+
+void QtViewer_ViewPort::drawForeground(QPainter *painter, const QRectF &rect)
+{
+ Q_UNUSED(rect);
+
+ for (QSharedPointer<QtViewer_PainterObject> obj : foregroundObjects)
+ obj->draw(painter);
+}
+
+void QtViewer_ViewPort::addItem( QGraphicsItem* theItem )
+{
+ scene()->addItem(theItem);
+}
+
+void QtViewer_ViewPort::fitAll()
+{
+ QRectF aRect;
+ foreach (QGraphicsItem* item, scene()->items())
+ {
+ if (item->isVisible())
+ aRect = aRect.united(item->boundingRect());
+ }
+
+ fitInView( aRect.adjusted(-myFitAllGap, -myFitAllGap, myFitAllGap, myFitAllGap), Qt::KeepAspectRatio);
+}
+
+void QtViewer_ViewPort::fitSelect()
+{
+ if (scene()->selectedItems().isEmpty())
+ return;
+
+ QRectF selectionRect;
+ foreach (QGraphicsItem *item, scene()->selectedItems())
+ selectionRect = selectionRect.united(item->sceneBoundingRect());
+
+ if(!selectionRect.isNull())
+ fitInView(selectionRect.adjusted(-myFitAllGap, -myFitAllGap, myFitAllGap, myFitAllGap), Qt::KeepAspectRatio);
+}
+
+void QtViewer_ViewPort::fitRect(const QRectF& theRect)
+{
+ fitInView(theRect, Qt::KeepAspectRatio);
+}
+
+QRect QtViewer_ViewPort::selectionRect()
+{
+ if (myRectBand)
+ {
+ QRect aRect;
+ aRect.setLeft(qMin( myRectBandStart.x(), myRectBandEnd.x()));
+ aRect.setTop(qMin( myRectBandStart.y(), myRectBandEnd.y()));
+ aRect.setRight(qMax( myRectBandStart.x(), myRectBandEnd.x()));
+ aRect.setBottom(qMax( myRectBandStart.y(), myRectBandEnd.y()));
+ return aRect;
+ }
+ return QRect();
+}
+
+void QtViewer_ViewPort::startDrawingRect( int x, int y )
+{
+ myRectBandStart = QPoint(x,y);
+
+ if (!myRectBand)
+ {
+ myRectBand = new QRubberBand(QRubberBand::Rectangle, this);
+ myRectBand->setGeometry(QRect(myRectBandStart, QSize()));
+ myRectBand->show();
+ }
+}
+
+void QtViewer_ViewPort::drawingRect( int x, int y )
+{
+ myRectBandEnd = QPoint(x,y);
+ myRectBand->setGeometry(QRect(myRectBandStart, myRectBandEnd).normalized());
+}
+
+void QtViewer_ViewPort::finishDrawingRect()
+{
+ myRectBand->hide();
+
+ QRectF selectionRect = mapToScene(myRectBand->geometry()).boundingRect();
+
+ if (fittingArea)
+ fitInView(selectionRect, Qt::KeepAspectRatio);
+ else
+ {
+ QList<QGraphicsItem *> selectedItems = scene()->items(selectionRect, Qt::IntersectsItemShape);
+ for (QGraphicsItem *item : selectedItems)
+ item->setSelected(true);
+ }
+
+ myRectBandStart = QPoint();
+ myRectBandEnd = QPoint();
+ delete myRectBand;
+ myRectBand = nullptr;
+}
+
+void QtViewer_ViewPort::updateSceneRect(const QRectF &rect)
+{
+}
+
+void QtViewer_ViewPort::mousePressEvent(QMouseEvent *event)
+{
+ if (!zooming && !panning && !globalPanning && items(event->pos()).count()==0 && (event->buttons() & Qt::LeftButton))
+ {
+ startDrawingRect(event->pos().x(), event->pos().y());
+ }
+
+ if (globalPanning)
+ {
+ QPoint p0 = viewport()->rect().center();
+ QPoint p1 = event->pos();
+ double deltaX = p0.x() - p1.x();
+ double deltaY = p0.y() - p1.y();
+
+ pan(deltaX, -deltaY);
+ }
+ QGraphicsView::mousePressEvent(event);
+ emit vpMouseEvent(event);
+}
+
+
+void QtViewer_ViewPort::mouseMoveEvent(QMouseEvent *event)
+{
+ if ((event->modifiers() & Qt::ShiftModifier) && (event->buttons() & Qt::LeftButton))
+ activateZoomAction();
+
+ if (event->buttons() & Qt::MiddleButton)
+ activatePanAction();
+
+ if (panning && event->buttons() & (Qt::LeftButton | Qt::MiddleButton))
+ {
+ QPoint currentPos = event->pos();
+
+ if (!previousPos.isNull())
+ {
+ double deltaX = currentPos.x() - previousPos.x();
+ double deltaY = currentPos.y() - previousPos.y();
+
+ pan(deltaX, -deltaY);
+
+ }
+ previousPos = currentPos;
+ viewport()->update();
+ }
+ else if (zooming && (event->buttons() & Qt::LeftButton))
+ {
+ QPoint currentPos = event->pos();
+ if (!previousPos.isNull())
+ {
+ int deltaX = currentPos.x() - previousPos.x();
+ double scaleFactor = deltaX>0 ? 1.1 : 0.9;
+ scale(scaleFactor, scaleFactor);
+ }
+ previousPos = currentPos;
+ }
+ else if (myRectBand)
+ drawingRect(event->pos().x(), event->pos().y());
+
+ QGraphicsView::mouseMoveEvent(event);
+ emit vpMouseEvent(event);
+}
+
+void QtViewer_ViewPort::mouseReleaseEvent(QMouseEvent *event)
+{
+ if (myRectBand)
+ finishDrawingRect();
+
+ clearActions();
+ QGraphicsView::mouseReleaseEvent(event);
+ emit vpMouseEvent(event);
+}
+
+void QtViewer_ViewPort::resizeEvent(QResizeEvent *event)
+{
+ QSize oldSize = event->oldSize();
+ QSize newSize = event->size();
+
+ qreal w = static_cast<qreal>(newSize.width());
+ qreal h = static_cast<qreal>(newSize.height());
+
+ qreal w0 = static_cast<qreal>(oldSize.width());
+ qreal h0 = static_cast<qreal>(oldSize.height());
+
+ qreal widthRatio = w/w0;
+ qreal heightRatio = h/h0;
+
+ if (widthRatio>0 && heightRatio>0)
+ {
+ qreal scaleFactor = w<h ? widthRatio : heightRatio;
+ scale(scaleFactor, scaleFactor);
+ }
+
+ QGraphicsView::resizeEvent(event);
+}
+
+void QtViewer_ViewPort::wheelEvent(QWheelEvent *event)
+{
+ int delta = event->angleDelta().y();
+ double scaleFactor = delta>0 ? 1.1 : 0.9;
+ scale(scaleFactor, scaleFactor);
+}
+
+void QtViewer_ViewPort::keyPressEvent(QKeyEvent *event)
+{
+ if (event->key() == Qt::Key_Escape)
+ clearActions();
+
+ QGraphicsView::keyPressEvent(event);
+}
+
+void QtViewer_ViewPort::clearActions()
+{
+ setCursor(Qt::ArrowCursor);
+ fittingArea = false;
+ zooming = false;
+ panning = false;
+ globalPanning = false;
+ previousPos = QPoint();
+}
+
+void QtViewer_ViewPort::activateZoomAction()
+{
+ zooming = true;
+ fittingArea = false;
+ panning = false;
+ globalPanning = false;
+ setCursor(*zoomCursor);
+}
+
+void QtViewer_ViewPort::activateFitAreaAction()
+{
+ fittingArea = true;
+ zooming = false;
+ panning = false;
+ globalPanning = false;
+ setCursor(Qt::PointingHandCursor);
+}
+
+void QtViewer_ViewPort::activatePanAction()
+{
+ panning = true;
+ fittingArea = false;
+ zooming = false;
+ globalPanning = false;
+ setCursor(Qt::SizeAllCursor);
+ viewport()->update();
+}
+
+void QtViewer_ViewPort::activateGlobalPanAction()
+{
+ globalPanning = true;
+ panning = false;
+ fittingArea = false;
+ zooming = false;
+ setCursor(Qt::CrossCursor);
+}
+
+void QtViewer_ViewPort::pan( double theDX, double theDY )
+{
+ if( QScrollBar* aHBar = horizontalScrollBar() )
+ {
+ int aNewValue = aHBar->value() - theDX;
+ if( aNewValue < aHBar->minimum() )
+ aHBar->setMinimum( aNewValue );
+ if( aNewValue > aHBar->maximum() )
+ aHBar->setMaximum( aNewValue );
+
+ aHBar->setValue( aHBar->value() - theDX );
+ }
+ if( QScrollBar* aVBar = verticalScrollBar() )
+ {
+ int aNewValue = aVBar->value() + theDY;
+ if( aNewValue < aVBar->minimum() )
+ aVBar->setMinimum( aNewValue );
+ if( aNewValue > aVBar->maximum() )
+ aVBar->setMaximum( aNewValue );
+ aVBar->setValue( aVBar->value() + theDY );
+ }
+}
+
+//================================================================
+// Function : dumpView
+// Purpose :
+//================================================================
+QImage QtViewer_ViewPort::dumpView( bool theWholeScene,
+ QSizeF theSize )
+{
+ QPixmap screenshot = viewport()->grab();
+ return screenshot.toImage();
+}
+
+bool QtViewer_ViewPort::dumpViewToFormat(const QString& fileName, const QString& format)
+{
+ if( format!="PS" && format!="EPS" )
+ return false;
+
+ QPrinter printer(QPrinter::ScreenResolution);
+ printer.setOutputFormat(QPrinter::NativeFormat);
+ printer.setOutputFileName(fileName);
+
+ QPainter painter;
+ if (!painter.begin(&printer))
+ return false;
+
+ render(&painter);
+ if (!painter.end())
+ return false;
+
+ return true;
+}
