ImageViewOld Class Reference

#include <ImageViewOld.h>

Inherits MultiWidget.

Inherited by RangeView, and SonarView.

Public Slots
void	emitUserExport ()
void	update ()
void	update2 ()
void	setDefaultImage ()
void	setZoomEnabled (bool enabled)
virtual void	openGL (bool flag)
bool	onOpenGL ()
Public Slots inherited from MultiWidget
void	setActive (bool b)
QString	getMinimizedLabel ()
void	setMinimizedLabel (QString label)
void	childEvent (QChildEvent *event)
bool	event (QEvent *event)
bool	isHiddenWhenMinimized () const
void	hideWhenMin (bool b)
Public Slots inherited from PaintWidget
QObject *	addItem (QObject *object)
QObject *	addPoints (const QList< int > &points_x, const QList< int > &points_y, int groupNr, const QColor &color)
QObject *	addText (int xPos, int yPos, int groupNr, const QString &text)
QObject *	addLine (int xPos, int yPos, int groupNr, const QColor &color, int endX, int endY)
QObject *	addEllipse (int xPos, int yPos, int groupNr, const QColor &color, int width, int height)
QObject *	addRectangle (int xPos, int yPos, int groupNr, const QColor &color, int width, int height)
QObject *	addPolyline (int groupNr, const QColor &color, const QList< QPoint > &points)
QObject *	addPolygon (int groupNr, const QColor &color, const QList< QPoint > &points)
QObject *	removeItem (QObject *drawItem, bool delete_object)
void	removeAllItems (bool delete_objects)

Signals
void	clickImage (int x, int y)
void	userExport ()
Signals inherited from MultiWidget
void	activityChanged (bool)

Public Member Functions
	ImageViewOld (QWidget *parent=NULL, bool use_openGL=false)
virtual	~ImageViewOld ()
void	contextMenuEvent (QContextMenuEvent *event)
int	heightForWidth (int w)
void	mouseDoubleClickEvent (QMouseEvent *event)
void	setAspectRatio (bool value)
bool	getAspectRatio ()
void	saveImage (bool overlay=true)
bool	saveImage2 (QString path, bool overlay=true)
bool	saveImage3 (const QString &mode, int pixel_size, int width, int height, const char *pbuffer, QString path, QString format)
void	resetCrop ()
void	crop (int x, int y, int w, int h)
void	addRawImage (const QString &mode, int pixel_size, int width, int height, const char *pbuffer, const int size)
void	addFrame (const base::samples::frame::Frame &frame)
void	addImage (const QImage &image)
void	setGroupStatus (int groupNr, bool enable)
void	clearGroups ()
int	getHeight () const
int	getWidth () const
int	getFormat () const
Public Member Functions inherited from MultiWidget
	MultiWidget (QWidget *parent=0)
Public Member Functions inherited from PaintWidget
	PaintWidget (QWidget *parent)
	~PaintWidget ()

Protected Member Functions
void	drawDrawItemsToImage (QImage &image, bool all=false)
void	drawDrawItemsToPainter (QPainter &painter, bool all=false)
virtual void	resizeEvent (QResizeEvent *event)
virtual void	paintEvent (QPaintEvent *event)
void	mousePressEvent (QMouseEvent *event)
void	mouseReleaseEvent (QMouseEvent *event)
void	calculateRects ()
std::pair< QPoint, bool >	toImage (QPoint const &p)
Protected Member Functions inherited from PaintWidget
void	drawDrawItemsToImage (QImage &image, bool all=false)
void	drawDrawItemsToPainter (QPainter &painter, bool all=false)
void	paintEvent (QPaintEvent *event)

Protected Attributes
QMenu	contextMenu
QAction *	save_image_act
QAction *	user_export_act
QString	save_path
QImage	originalImage
QImage	image
QRect	currentCrop
bool	no_input
bool	aspect_ratio
frame_helper::FrameQImageConverter	frame_converter
ImageViewOldGL *	image_view_gl
QRectF	target
QRectF	source
bool	zoomEnabled
QPoint	pressPoint
bool	pressValid
Protected Attributes inherited from MultiWidget
bool	isActive
bool	wasHidden
Protected Attributes inherited from PaintWidget
QList< DrawItem * >	items
QList< int >	disabledGroups
bool	isOpenGL

Properties
bool	Use_OpenGL
bool	Aspect_Ratio
Properties inherited from MultiWidget
bool	hideWhenMinimized
QString	minimizedLabel

Friends
class	ImageViewOldGL

Detailed Description

Widget which displays an image. The dimensions and the format needs to be given and images can then be added an will be shown immidiately.

Imaging

If an image which is larger than the specified dimension is added, only the images visible parts (within the dimension specified) will be shown.
Alternatively one can add an image and scale it. No scaling will be done if the image already has the proportions given at start. Scaling is costy though. If more images of a different size shall be added the best way is to change the format via changeFormat. This will change the format according to the new dimensions. This should be the default behaviour e.g. if a cameras resolution was changed so is the widgets. Scaling should only be done if a few images are changed or if the images are all quite large and should be scaled to enhance the viewing. Note though, again, that scaling does cost performance.

Drawing shapes

One can draw shapes on top of the image. Currently these are:

• Texts
• Lines
• Ellipses
• Rectangles
• Polylines
• Polygones

One can add the shapes via addItem or a specific convenience method like addText, addLine etc. Added Items will be displayed on top of the image currently displayed and all successive images. RemoveItems, removes the given item. Alternatively all specific shapes can be removed or all Items.
Items can have a group number and all items with a specific group number can be shown or hidden. Note that hidden is NOT the same as removed. Hidden just does not draw them, removed items can not be retrieved by the widget (even though they might be from outside the class).
Note: After adding any shape no repaint will be done. You need to either explicitly call repaint on the widget or add a different image will will automatically have the shapes added ontop of it. Otherwise, if adding multiple shapes, repaint would be called very often which especially when working with video would be a performance waste.

Author

Bjoern Lueck, Alexander Duda

Version

0.1

Deprecated:

This class is deprecated and will no longer be maintained. You should use the new ImageView widget.

Definition at line 74 of file ImageViewOld.h.

Constructor & Destructor Documentation

ImageViewOld::ImageViewOld	(	QWidget *	parent = NULL,
		bool	use_openGL = false
	)

Initializing the widget with the given format and dimensions For format parameters

Parameters

width	the width of images put onto the widget
height	the height of images put onto the widget

Definition at line 15 of file ImageViewOld.cc.

                                                         :
  MultiWidget(parent),
  contextMenu(this),
  image(0, 0, QImage::Format_RGB888),
  aspect_ratio(false),
  zoomEnabled(false)
{
    resize(width(),height());
    //setting up popup menue
    save_image_act = new QAction(tr("&Save Image"),this);
    user_export_act = new QAction(tr("&User Export"),this);
    save_image_act->setStatusTip(tr("Save the image to disk"));
    user_export_act->setStatusTip(tr("Emits an event for user specific export"));
    connect(save_image_act,SIGNAL(triggered()),this,SLOT(saveImage()));
    connect(user_export_act,SIGNAL(triggered()),this,SLOT(emitUserExport()));
    contextMenu.addAction(save_image_act);
    contextMenu.addAction(user_export_act);

    //setting up widget
    setWindowTitle(tr("ImageView"));
    setDefaultImage();
    calculateRects();
  
    //configure opengl if activated
    image_view_gl = NULL;
    openGL(use_openGL);
}

ImageViewOld::~ImageViewOld ( )

virtual

Destructor cleaning up

Definition at line 44 of file ImageViewOld.cc.

{
    disconnect(save_image_act, 0, 0, 0);
    delete save_image_act;
}

Member Function Documentation

void ImageViewOld::addFrame

(

const base::samples::frame::Frame &

frame

)

Definition at line 250 of file ImageViewOld.cc.

{
  if(frame_converter.copyFrameToQImageRGB888(originalImage,frame))
  {
    this->image = this->originalImage;
    if(image_view_gl)
    {
      image_view_gl->setGLViewPoint();
    }
  }
  calculateRects();
  this->image = this->originalImage;
  no_input = false;
}

void ImageViewOld::addImage

(

const QImage &

image

)

Adds a QImage to the widget.

Parameters

image

the image to be added

Definition at line 242 of file ImageViewOld.cc.

{
  //check if image size has changed
  //zoom factor must be recalculated
  this->image = this->originalImage = image;
  no_input = false;
}

void ImageViewOld::addRawImage	(	const QString &	mode,
		int	pixel_size,
		int	width,
		int	height,
		const char *	pbuffer,
		const int	size
	)

Adds an image to the display, given raw data in pbuffer

• mode the mode as a string. This maps to the values in the base::samples::frame::frame_mode_t enumeration (see below)
• pixel_size the size of a complete pixel, in bytes
• with the width of the image, in pixels
• height the height of the image, in pixels
• pbuffer the raw data

The following modes are understood in mode:

• MODE_GRAYSCALE
• MODE_RGB
• MODE_UYVY

Definition at line 225 of file ImageViewOld.cc.

{
  //check if image size has been changed
  //zoom factor must be recalculated
  if(frame_converter.copyFrameToQImageRGB888(originalImage,mode, pixel_size, width, height,pbuffer,size))
  {
    this->image = this->originalImage;
    if(image_view_gl)
    {
      image_view_gl->setGLViewPoint();
    }
  }
  calculateRects();
  this->image = this->originalImage;
  no_input = false;
}

void ImageViewOld::calculateRects ( )

protected

Definition at line 309 of file ImageViewOld.cc.

{
  int x_offset = 0;
  int y_offset = 0;
  if(aspect_ratio)
  {
    float x =1; 
    float y =1; 
    if (image.width() && image.height())
    {
      x = ((float)width())/ image.width();
      y = ((float)height())/ image.height();
    }
    if(x < y)
      y_offset =  0.5f*(height()-x*image.height());
    else
      x_offset =  0.5f*(width()-y*image.width());
  }
  target.setRect(x_offset, y_offset, width()-x_offset*2, height()-y_offset*2);
  source.setRect(0.0, 0.0, image.width(), image.height());
}

void ImageViewOld::clearGroups

(

)

Removes all groups stati. If there are still shapes with group numbers they will all be visible afterwards

Definition at line 206 of file ImageViewOld.cc.

{
    disabledGroups.clear();
}

void ImageViewOld::clickImage ( int  x, int  y  )

signal

void ImageViewOld::contextMenuEvent

(

QContextMenuEvent *

event

)

Definition at line 61 of file ImageViewOld.cc.

{
   contextMenu.exec(event->globalPos());
}

void ImageViewOld::crop	(	int	x,
		int	y,
		int	w,
		int	h
	)

Crops the current image

Definition at line 218 of file ImageViewOld.cc.

{
  this->image = this->image.copy(x, y, w, h);
  currentCrop = QRect(x, y, w, h);
  calculateRects();
}

void ImageViewOld::drawDrawItemsToImage ( QImage &  image, bool  all = false  )

protected

Adds all shapes to the image

Parameters

shownImage

teh iamge to add the shapes to

Definition at line 283 of file ImageViewOld.cc.

{
    QPainter painter(&image);
    drawDrawItemsToPainter(painter,all);
}

void ImageViewOld::drawDrawItemsToPainter ( QPainter &  painter, bool  all = false  )

protected

Definition at line 265 of file ImageViewOld.cc.

{
    if(!image_view_gl)
      all = true;

    if(!items.empty())
    {
        painter.setRenderHint(QPainter::TextAntialiasing, true);
    QList<DrawItem*>::iterator iter = items.begin();
        for(;iter != items.end();++iter)
        {
      if(!disabledGroups.contains((*iter)->getGroupNr()))
        if(!(*iter)->onOpenGL() || all == true)
                (*iter)->draw(&painter,source,target);
        }
    }
}

void ImageViewOld::emitUserExport ( )

slot

Definition at line 50 of file ImageViewOld.cc.

{
    emit userExport();
}

bool ImageViewOld::getAspectRatio ( )

inline

Definition at line 118 of file ImageViewOld.h.

{return aspect_ratio;};

int ImageViewOld::getFormat ( ) const

inline

Definition at line 167 of file ImageViewOld.h.

{return image.format();};

int ImageViewOld::getHeight ( ) const

inline

Definition at line 165 of file ImageViewOld.h.

{return image.height();};

int ImageViewOld::getWidth ( ) const

inline

Definition at line 166 of file ImageViewOld.h.

{return image.width();};

int ImageViewOld::heightForWidth ( int  w )

inline

Definition at line 96 of file ImageViewOld.h.

{return w*image.height()/image.width(); };

void ImageViewOld::mouseDoubleClickEvent

(

QMouseEvent *

event

)

Definition at line 350 of file ImageViewOld.cc.

{
}

void ImageViewOld::mousePressEvent ( QMouseEvent *  event )

protected

Definition at line 90 of file ImageViewOld.cc.

{
  std::pair<QPoint, bool> img = toImage(QPoint(event->x(), event->y()));
  pressPoint = img.first;
  pressValid = img.second;
}

void ImageViewOld::mouseReleaseEvent ( QMouseEvent *  event )

protected

Definition at line 97 of file ImageViewOld.cc.

{
  if (event->modifiers() & Qt::ControlModifier)
  {
    // Cancel current zoom
    if (!zoomEnabled)
      return;

    resetCrop();
    update();
    return;
  }

  std::pair<QPoint, bool> imgPoint = toImage(QPoint(event->x(), event->y()));
  QPoint releasePoint = imgPoint.first;
  int distance = (releasePoint - pressPoint).manhattanLength();
  if (zoomEnabled && distance > 5)
  {
    int w = abs((pressPoint - releasePoint).x()) + 1;
    int h = abs((pressPoint - releasePoint).y()) + 1;
    int x = std::min(pressPoint.x(), releasePoint.x());
    int y = std::min(pressPoint.y(), releasePoint.y());
    crop(x, y, w, h);
    update();
  }
  else if (pressValid)
    emit clickImage(pressPoint.x(), pressPoint.y());
}

bool ImageViewOld::onOpenGL ( )

inlineslot

Definition at line 111 of file ImageViewOld.h.

{return image_view_gl;};

void ImageViewOld::openGL ( bool  flag )

virtualslot

Definition at line 141 of file ImageViewOld.cc.

{
  if(flag)
  {
    //prevent activating if it is already activated
    if(image_view_gl)
      return;

    image_view_gl = new ImageViewOldGL(*this);
    if (!image_view_gl)
      return;
    image_view_gl->resize(width(),height());
    image_view_gl->setAspectRatio(aspect_ratio);
    image_view_gl->show();
  }
  else
  {
    delete image_view_gl;
    image_view_gl = NULL;
  }  
    isOpenGL = flag;
    for(QList<DrawItem*>::iterator iter = items.begin();iter != items.end();++iter) (*iter)->openGL(flag);
}

void ImageViewOld::paintEvent ( QPaintEvent *  event )

protectedvirtual

Reimplemented in SonarView.

Definition at line 331 of file ImageViewOld.cc.

{
  QPainter painter(this);
  painter.drawImage(target, image, source);
  drawDrawItemsToPainter(painter,true);
}

void ImageViewOld::resetCrop

(

)

Removes any cropping previously set with crop(x, y, w, h)

Definition at line 211 of file ImageViewOld.cc.

{
  this->image = this->originalImage;
  currentCrop = QRect(0, 0, image.width(), image.height());
  calculateRects();
}

void ImageViewOld::resizeEvent ( QResizeEvent *  event )

protectedvirtual

Definition at line 338 of file ImageViewOld.cc.

{
  QWidget::resizeEvent(event);

  if(no_input)
    setDefaultImage();
  if(image_view_gl)
    image_view_gl->resize(width(),height());

  calculateRects();
}

void ImageViewOld::saveImage

(

bool

overlay = true

)

Definition at line 165 of file ImageViewOld.cc.

{
    QString path = QFileDialog::getSaveFileName(this, tr("Save File"),
                            save_path,
                            tr("Images (*.png)"));
    if(path.length() > 0)   
      saveImage2(path,overlay);
}

bool ImageViewOld::saveImage2	(	QString	path,
		bool	overlay = true
	)

Definition at line 173 of file ImageViewOld.cc.

{
    if(overlay)
    {
      QImage temp(image);
      drawDrawItemsToImage(temp,true);
      temp.save(path,"PNG",80);
    }
    else
      image.save(path,"PNG",80);
    return true;
}

bool ImageViewOld::saveImage3	(	const QString &	mode,
		int	pixel_size,
		int	width,
		int	height,
		const char *	pbuffer,
		QString	path,
		QString	format
	)

Definition at line 186 of file ImageViewOld.cc.

{
    QImage image;
    frame_converter.copyFrameToQImageRGB888(image,mode, pixel_size, width, height,pbuffer);
    image.save(path,format.toAscii().data(),80);
    return true;
}

void ImageViewOld::setAspectRatio ( bool  value )

inline

Definition at line 112 of file ImageViewOld.h.

    {
      aspect_ratio=value;
      if(image_view_gl)
        image_view_gl->setAspectRatio(value);
    };

void ImageViewOld::setDefaultImage ( )

slot

Definition at line 126 of file ImageViewOld.cc.

{
   static QColor background(127, 127, 127);
   static QColor textcolor(255,255,255);
   this->originalImage = QImage(width(),height(),QImage::Format_RGB888);
   QPainter painter(&this->originalImage);
   painter.setBrush(background);
   painter.drawRect(0,0,image.width(),image.height());
   painter.setBrush(textcolor);
   painter.drawText(0,0,image.width(),image.height(),
                    Qt::AlignVCenter|Qt::AlignHCenter,"No Signal");
   image = originalImage;
   no_input = true;
}

void ImageViewOld::setGroupStatus	(	int	groupNr,
		bool	enable
	)

Definition at line 194 of file ImageViewOld.cc.

{
    if(!enable)
    {
        disabledGroups.push_back(groupNr);
    }
    else
    {
        disabledGroups.removeAll(groupNr);
    }
}

void ImageViewOld::setZoomEnabled ( bool  enabled )

slot

Definition at line 56 of file ImageViewOld.cc.

{
  zoomEnabled = enabled;
}

std::pair< QPoint, bool > ImageViewOld::toImage ( QPoint const &  p )

protected

Definition at line 66 of file ImageViewOld.cc.

{
  //calculate pos on image 
  int offset_x = target.x();
  int offset_y = target.y();
  float scale_x = source.width()/target.width();
  float scale_y = source.height()/target.height();
  
  int x = (int)(scale_x*(p.x()-offset_x)+0.5);
  int y = (int)(scale_y*(p.y()-offset_y)+0.5);

  bool valid = (x>=0 && x <= source.width() &&
      y>=0 && y <= source.height());

  if (!valid)
  {
    x = x < 0 ? 0 : source.width() - 1;
    y = y < 0 ? 0 : source.height() - 1;
  }
  x += currentCrop.x();
  y += currentCrop.y();
  return std::make_pair(QPoint(x, y), valid);
}

void ImageViewOld::update ( )

slot

Definition at line 296 of file ImageViewOld.cc.

{
  if(image_view_gl)
  {
    //only opengl overlays are displayed
    image_view_gl->repaint();
  }
  else
  {
    QWidget::update();
  }
}

void ImageViewOld::update2 ( )

slot

Definition at line 291 of file ImageViewOld.cc.

{
  update();
}

void ImageViewOld::userExport ( )

signal

Friends And Related Function Documentation

friend class ImageViewOldGL

friend

Definition at line 82 of file ImageViewOld.h.

Member Data Documentation

bool ImageViewOld::aspect_ratio

protected

Definition at line 192 of file ImageViewOld.h.

QMenu ImageViewOld::contextMenu

protected

Definition at line 183 of file ImageViewOld.h.

QRect ImageViewOld::currentCrop

protected

Definition at line 190 of file ImageViewOld.h.

frame_helper::FrameQImageConverter ImageViewOld::frame_converter

protected

Definition at line 194 of file ImageViewOld.h.

QImage ImageViewOld::image

protected

Definition at line 189 of file ImageViewOld.h.

ImageViewOldGL* ImageViewOld::image_view_gl

protected

Definition at line 195 of file ImageViewOld.h.

bool ImageViewOld::no_input

protected

Definition at line 191 of file ImageViewOld.h.

QImage ImageViewOld::originalImage

protected

Definition at line 188 of file ImageViewOld.h.

QPoint ImageViewOld::pressPoint

protected

Definition at line 201 of file ImageViewOld.h.

bool ImageViewOld::pressValid

protected

Definition at line 202 of file ImageViewOld.h.

QAction* ImageViewOld::save_image_act

protected

Definition at line 184 of file ImageViewOld.h.

QString ImageViewOld::save_path

protected

Definition at line 186 of file ImageViewOld.h.

QRectF ImageViewOld::source

protected

Definition at line 198 of file ImageViewOld.h.

QRectF ImageViewOld::target

protected

Definition at line 197 of file ImageViewOld.h.

QAction* ImageViewOld::user_export_act

protected

Definition at line 185 of file ImageViewOld.h.

bool ImageViewOld::zoomEnabled

protected

Definition at line 200 of file ImageViewOld.h.

Property Documentation

bool ImageViewOld::Aspect_Ratio

readwrite

Definition at line 79 of file ImageViewOld.h.

bool ImageViewOld::Use_OpenGL

readwrite

Definition at line 78 of file ImageViewOld.h.

---

The documentation for this class was generated from the following files:

• /build/rock-master-18.09-gui-rock-widget-collection-0.20180124/src/image_view_old/ImageViewOld.h
• /build/rock-master-18.09-gui-rock-widget-collection-0.20180124/src/image_view_old/ImageViewOld.cc