270 lines
8.9 KiB
C++
270 lines
8.9 KiB
C++
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/*=============================================================================
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Copyright (C) 2012 Allied Vision Technologies. All Rights Reserved.
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Redistribution of this file, in original or modified form, without
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prior written consent of Allied Vision Technologies is prohibited.
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-------------------------------------------------------------------------------
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File: Viewer.cpp
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Description: - Displaying data from the camera in RGB32 format.
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- Scrolling, Rotating, Saving single image
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-------------------------------------------------------------------------------
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF TITLE,
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NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#include <UI/Viewer.h>
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#include <QMenu>
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#include <QMouseEvent>
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#include <QFileDialog>
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#include <QScrollBar>
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Viewer::Viewer ( QWidget *parent ): QGraphicsView ( parent ), m_ZoomFactor ( 0 ), m_ColorInterpolationAct ( NULL ),
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m_bColorInterpolationState ( true ), m_bIsFitToWindow ( false ),
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m_bIsPressed ( false )
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{
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setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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setMouseTracking(true);
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}
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Viewer::~Viewer ( void )
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{
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}
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void Viewer::enableFitToWindow ( const bool &bIsEnable )
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{
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m_bIsFitToWindow = bIsEnable;
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}
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void Viewer::setDefaultSize ( void )
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{
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resetCachedContent();
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resetMatrix();
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resetTransform();
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m_ZoomFactor = 0;
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}
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void Viewer::SetCenter ( const QPointF& centerPoint )
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{
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/* Get the rectangle of the visible area in scene coords */
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QRectF visibleArea = mapToScene(rect()).boundingRect();
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/* Get the scene area */
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QRectF sceneBounds = sceneRect();
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double boundX = visibleArea.width() / 2.0;
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double boundY = visibleArea.height() / 2.0;
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double boundWidth = sceneBounds.width() - 2.0 * boundX;
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double boundHeight = sceneBounds.height() - 2.0 * boundY;
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/* The max boundary that the centerPoint can be to */
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QRectF bounds(boundX, boundY, boundWidth, boundHeight);
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if(bounds.contains(centerPoint))
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{
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/* We are within the bounds */
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m_CurrentCenterPoint = centerPoint;
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}
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else
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{
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/* We need to clamp or use the center of the screen */
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if(visibleArea.contains(sceneBounds))
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{
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/* Use the center of scene ie. we can see the whole scene */
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m_CurrentCenterPoint = sceneBounds.center();
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}
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else
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{
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m_CurrentCenterPoint = centerPoint;
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/* We need to clamp the center. The centerPoint is too large */
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if(centerPoint.x() > bounds.x() + bounds.width())
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{
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m_CurrentCenterPoint.setX(bounds.x() + bounds.width());
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}
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else if(centerPoint.x() < bounds.x())
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{
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m_CurrentCenterPoint.setX(bounds.x());
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}
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if(centerPoint.y() > bounds.y() + bounds.height())
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{
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m_CurrentCenterPoint.setY(bounds.y() + bounds.height());
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}
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else if(centerPoint.y() < bounds.y())
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{
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m_CurrentCenterPoint.setY(bounds.y());
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}
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}
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}
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/* Update the scrollbars */
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centerOn(m_CurrentCenterPoint);
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}
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void Viewer::saveImage ( void )
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{
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emit savingImage();
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}
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void Viewer::colorInterpolationChecked ( bool bState )
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{
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m_bColorInterpolationState = bState;
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emit setColorInterpolationState (m_bColorInterpolationState);
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}
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void Viewer::updateInterpolationState ( const bool &bState )
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{
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m_bColorInterpolationState = bState;
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}
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/* Handles when the mouse button is pressed */
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void Viewer::mousePressEvent ( QMouseEvent* event )
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{
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m_bIsPressed = true;
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Qt::MouseButton mouseBtn = event->button();
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if( Qt::RightButton == mouseBtn )
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{
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QMenu menu;
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menu.addAction(QIcon(":/VimbaViewer/Images/save.png"), tr("Save Image..."), this, SLOT(saveImage()));
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if(NULL != m_ColorInterpolationAct)
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{
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disconnect(m_ColorInterpolationAct, SIGNAL(toggled(bool)), this, SLOT(colorInterpolationChecked(bool)) );
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delete m_ColorInterpolationAct;
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m_ColorInterpolationAct = NULL;
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}
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m_ColorInterpolationAct = new QAction(this);
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m_ColorInterpolationAct->setObjectName(QString::fromUtf8("ColorInterpolation"));
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m_ColorInterpolationAct->setCheckable(true);
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m_ColorInterpolationAct->setText("Color Interpolation");
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m_ColorInterpolationAct->setChecked(m_bColorInterpolationState);
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menu.addAction(m_ColorInterpolationAct);
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connect(m_ColorInterpolationAct, SIGNAL(toggled(bool)), this, SLOT(colorInterpolationChecked(bool)) );
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menu.exec(event->globalPos());
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}
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else
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{
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/* For panning the view */
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m_LastPanPoint = event->pos();
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if(horizontalScrollBar()->isVisible() || verticalScrollBar()->isVisible())
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setCursor(Qt::ClosedHandCursor);
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else if((!horizontalScrollBar()->isVisible() && !verticalScrollBar()->isVisible()))
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setCursor(Qt::ArrowCursor);
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}
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}
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/* Handles when the mouse button is released */
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void Viewer::mouseReleaseEvent ( QMouseEvent* event )
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{
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m_bIsPressed = false;
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if(horizontalScrollBar()->isVisible() || verticalScrollBar()->isVisible())
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setCursor(Qt::OpenHandCursor);
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m_LastPanPoint = QPoint();
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}
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/* Handles the mouse move event */
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void Viewer::mouseMoveEvent ( QMouseEvent* event )
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{
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if((horizontalScrollBar()->isVisible() || verticalScrollBar()->isVisible()) && !m_bIsPressed)
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setCursor(Qt::OpenHandCursor);
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else if((!horizontalScrollBar()->isVisible() && !verticalScrollBar()->isVisible()))
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setCursor(Qt::ArrowCursor);
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if(!m_LastPanPoint.isNull())
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{
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/* Get how much we panned */
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QPointF delta = mapToScene(m_LastPanPoint) - mapToScene(event->pos());
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m_LastPanPoint = event->pos();
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/* Update the center e.g do the pan */
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QPointF F = GetCenter();
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SetCenter(GetCenter() + delta);
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}
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}
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/* Zoom the view in and out. */
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void Viewer::wheelEvent ( QWheelEvent* event )
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{
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0 < event->delta() ? zoomIn() : zoomOut();
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}
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/**
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* Need to update the center so there is no jolt in the
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* interaction after resizing the widget.
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*/
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void Viewer::resizeEvent ( QResizeEvent* event )
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{
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/* Call the subclass resize so the scrollbars are updated correctly */
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if(m_bIsFitToWindow)
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{
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fitInView(scene()->itemsBoundingRect(), Qt::IgnoreAspectRatio);
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}
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QGraphicsView::resizeEvent(event);
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}
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QPointF Viewer::GetCenter ( void )
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{
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return m_CurrentCenterPoint;
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}
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void Viewer::zoomIn ( void )
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{
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/* Get the position of the mouse before scaling, in scene coords */
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QPointF pointBeforeScale(mapToScene(pos()));
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/* Get the original screen center point */
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QPointF screenCenter = GetCenter();
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/* How fast we zoom */
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double scaleFactor = 1.15;
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scale(scaleFactor, scaleFactor);
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m_ZoomFactor++;
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updateCenter(pointBeforeScale, screenCenter);
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}
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void Viewer::zoomOut ( void )
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{
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/* Get the position of the mouse before scaling, in scene coords */
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QPointF pointBeforeScale(mapToScene(pos()));
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/* Get the original screen center point */
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QPointF screenCenter = GetCenter();
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/* How fast we zoom */
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double scaleFactor = 1.15;
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scale(1.0 / scaleFactor, 1.0 / scaleFactor);
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m_ZoomFactor--;
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updateCenter(pointBeforeScale, screenCenter);
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}
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void Viewer::updateCenter ( QPointF pointBeforeScale, QPointF screenCenter )
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{
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/* Get the position after scaling, in scene coords */
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QPointF pointAfterScale(mapToScene(pos()));
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/* Get the offset of how the screen moved */
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QPointF offset = pointBeforeScale - pointAfterScale;
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/* Adjust to the new center for correct zooming */
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QPointF newCenter = screenCenter + offset;
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SetCenter(newCenter);
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}
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