camera

[Harini]

/home/stesalit/Desktop/cam/webcam.cpp:186: error: within this context ---> what does this mean??

left with only these

/home/stesalit/Desktop/cam/webcam.cpp:348: error: request for member ‘load’ in ‘((WebCam*)this)->WebCam:mBk’, which is of non-class type ‘QPixmap*’


/home/stesalit/Desktop/cam/webcam.cpp:364: error: expected primary-expression before ‘*’ token


/home/stesalit/Desktop/cam/webcam.cpp:361: error: ‘class QPixmap’ has no member named ‘resize’

Here, in the above error I'm not getting what to use in the place of "resize" I searched the entire doc but i dint found the size option so, what to use here??



Any one please please help me in rectifying these errors....

[wysota]

/home/stesalit/Desktop/cam/webcam.cpp:186: error: within this context ---> what does this mean??

This means the previous error happened because of this line. As I said (and I won't repeat myself again) always look on the first error message.

left with only these

/home/stesalit/Desktop/cam/webcam.cpp:348: error: request for member ‘load’ in ‘((WebCam*)this)->WebCam:mBk’, which is of non-class type ‘QPixmap*’


/home/stesalit/Desktop/cam/webcam.cpp:364: error: expected primary-expression before ‘*’ token


/home/stesalit/Desktop/cam/webcam.cpp:361: error: ‘class QPixmap’ has no member named ‘resize’

I think these messages are pretty much self-explanatory.

[Harini]

done !! fynally ,left with this... getting :364: error: expected primary-expression before ‘*’ token here. painter.drawPixmap(QPixmap *pmBk,this); in the below code. please help me


void WebCam::drawImage()
{
QMatrix matrix;
QPainter painter(this);
QString strTime;

matrix.scale(-1.0,1.0);
// pmBk=pmBk.xForm(matrix);
// pmPaint->resize(width(),height());
resize(width(),height());
// pmPaint->resize( QSize(width(),height()).expandedTo(minimumSizeHint ()));
//pmPaint->rect(width(), height());
// painter.begin(QPaintDevice* pmPaint, this);
// painter.begin(*pmBk);
painter.begin(this);
// painter.drawPixmap(QPointF(0,0), QPixmap *pmBk, this);
painter.drawPixmap(QPixmap *pmBk,this);
// painter.drawPixmap(QPointF(0,0), &pmBk,this);
painter.begin(this);
painter.end();

[wysota]

The offending line is not a proper C++ syntax. It should probably be drawPixmap(pmBk, this) or something like that.

[Harini]

The offending line is not a proper C++ syntax. It should probably be drawPixmap(pmBk, this) or something like that.

when i use drawPixmap(pmBk, this) getting warnings and this error
error: no matching function for call to ‘QPainter::drawPixmap(QPixmap*&, WebCam* const)’

[wysota]

Great. Now go and fix your code.

[Harini]

Great. Now go and fix your code.

sorry, I dint get u


can u please give me the line with which I can replace??

[wysota]

How should I know that? It is your code, not mine. You are the only person who knows what your intentions were when you were writting this non-working code.

[Harini]

I replaced with this line painter.drawPixmap(this,QPixmap *pmBk,this ); but getting the same error error: expected primary-expression before ‘*’ token

[wysota]

This is again invalid C++ code.

Maybe you should learn C++ first before trying to use it?

[Harini]

god diying with this tried a lot
again getting errors here...

#include <QApplication>
#include <QPainter>
#include <QPixmap>
#include <QSplashScreen>
#include <QWidget>
 
#include "SplashScreen.h"
 
SplashScreen::SplashScreen(const QPixmap &pixmap,Qt::WindowFlags ) :
        QWidget(pixmap , 0,Qt::FramelessWindowHint,
                           Qt::WindowStaysOnTopHint,
                           Qt::Tool)
                //Qt::WStyle_Customize ,Qt:: WStyle_NoBorder ,Qt:: WStyle_StaysOnTop ,Qt:: WStyle_Tool)
 
{
        QPixmap pix;
        pix.load("image.jpg");
        //setBackgroundPixmap(pix);
 
        resize( pix.size() );
 
	QRect scr = QApplication::desktop()->geometry();
	move( scr.center() - rect().center() );
	show();
	repaint();
}
 
void SplashScreen::repaint()
{
	QWidget::repaint();
	qApp->processEvents();
}
 
void SplashScreen::finish()
{
	close();
}
 
void SplashScreen::showMessage(const QString &message,
                               int alignment =Qt::AlignLeft,
                               const QColor &color = Qt:: white)
 
{
        QPixmap textPix = pix;
	QPainter painter( &textPix, this );
        painter.setPen(Qt::blue);
        painter.setFont(QFont("Arial", 30));
	QRect r = rect();
	r.setRect( r.x() + 10, r.y() + 10, r.width() - 20, r.height() - 20 );
	painter.drawText( r, alignment, message );
       // setBackgroundPixmap( textPix );
        painter.background(textPix);
	repaint();
}

#include <QApplication>
#include <QPainter>
#include <QPixmap>
#include <QSplashScreen>
#include <QWidget>

#include "SplashScreen.h"

SplashScreen::SplashScreen(const QPixmap &pixmap,Qt::WindowFlags ) :
        QWidget(pixmap , 0,Qt::FramelessWindowHint,
                           Qt::WindowStaysOnTopHint,
                           Qt::Tool)
                //Qt::WStyle_Customize ,Qt:: WStyle_NoBorder ,Qt:: WStyle_StaysOnTop ,Qt:: WStyle_Tool)

{
        QPixmap pix;
        pix.load("image.jpg");
        //setBackgroundPixmap(pix);

        resize( pix.size() );

	QRect scr = QApplication::desktop()->geometry();
	move( scr.center() - rect().center() );
	show();
	repaint();
}

void SplashScreen::repaint()
{
	QWidget::repaint();
	qApp->processEvents();
}

void SplashScreen::finish()
{
	close();
}

void SplashScreen::showMessage(const QString &message,
                               int alignment =Qt::AlignLeft,
                               const QColor &color = Qt:: white)

{
        QPixmap textPix = pix;
	QPainter painter( &textPix, this );
        painter.setPen(Qt::blue);
        painter.setFont(QFont("Arial", 30));
	QRect r = rect();
	r.setRect( r.x() + 10, r.y() + 10, r.width() - 20, r.height() - 20 );
	painter.drawText( r, alignment, message );
       // setBackgroundPixmap( textPix );
        painter.background(textPix);
	repaint();
}

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errors

/home/stesalit/Desktop/cam/SplashScreen.cpp:41: error: default argument given for parameter 2 of ‘void SplashScreen::showMessage(const QString&, int, const QColor&)’

/home/stesalit/Desktop/cam/SplashScreen.h:24: error: after previous specification in ‘void SplashScreen::showMessage(const QString&, int, const QColor&)’

/home/stesalit/Desktop/cam/SplashScreen.cpp:41: error: default argument given for parameter 3 of ‘void SplashScreen::showMessage(const QString&, int, const QColor&)’

/home/stesalit/Desktop/cam/SplashScreen.h:24: error: after previous specification in ‘void SplashScreen::showMessage(const QString&, int, const QColor&)’

/home/stesalit/Desktop/cam/SplashScreen.cpp:45: error: no matching function for call to ‘QPainter::QPainter(QPixmap*, SplashScreen* const)’

/home/stesalit/Desktop/cam/SplashScreen.cpp:52: error: no matching function for call to ‘QPainter::background(QPixmap&)’

[wysota]

The error is self-explanatory, it's still a problem with C++ syntax. Don't blindly copy code but rather write your own (which you understand) using correct C++ syntax.

[Harini]

#include <QMessageBox>
#include <QDir>
#include <QList>
#include <QComboBox>
#include "mydialog.h"
 
//MyDialog::MyDialog(QWidget* parent = 0, const char* name = 0, bool modal = FALSE, WindowFlags f= 0 )
                //:QDialog(parent,name,modal,f)
 
MyDialog::MyDialog(QWidget* parent )
                :QDialog(parent)
 
{  
        lb1 = new QComboBox(this);
	lb1->setGeometry(10,10,200,70);
 
	QDir dir;
 
	dir.setCurrent( "./" );
        //dir.setNameFilter("*.jpg");
        dir.setNameFilters(QStringList()<<"*.jpg");
	for(int i=0;i<(int)dir.count();i++)
                lb1->insertItem(dir[i]);
 
	connect(lb1,SIGNAL(selected(int)),this,SLOT(slotSelected(int)));
	connect(lb1,SIGNAL(highlighted(int)),this,SLOT(slotHighlighted(int)));
}
 
QString MyDialog::getName()
{
	return str;
}
 
void MyDialog::slotSelected(int index)
{
        str = lb1->itemText(index);
	accept();
}
 
void MyDialog::slotHighlighted(int index)
{
	str = lb1->currentText();
}

#include <QMessageBox>
#include <QDir>
#include <QList>
#include <QComboBox>
#include "mydialog.h"

//MyDialog::MyDialog(QWidget* parent = 0, const char* name = 0, bool modal = FALSE, WindowFlags f= 0 )
                //:QDialog(parent,name,modal,f)

MyDialog::MyDialog(QWidget* parent )
                :QDialog(parent)

{  
        lb1 = new QComboBox(this);
	lb1->setGeometry(10,10,200,70);
	
	QDir dir;
	
	dir.setCurrent( "./" );
        //dir.setNameFilter("*.jpg");
        dir.setNameFilters(QStringList()<<"*.jpg");
	for(int i=0;i<(int)dir.count();i++)
                lb1->insertItem(dir[i]);
	
	connect(lb1,SIGNAL(selected(int)),this,SLOT(slotSelected(int)));
	connect(lb1,SIGNAL(highlighted(int)),this,SLOT(slotHighlighted(int)));
}

QString MyDialog::getName()
{
	return str;
}

void MyDialog::slotSelected(int index)
{
        str = lb1->itemText(index);
	accept();
}

void MyDialog::slotHighlighted(int index)
{
	str = lb1->currentText();
}

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error

/home/stesalit/Desktop/cam/mydialog.cpp:23: error: no matching function for call to ‘QComboBox::insertItem(QString)’


syntax error
tis is the line
void QComboBox::insertItem ( int index, const QString & text, const QVariant & userData = QVariant() )


and i tried a lot to implement this but still getting the error

with which line i can replace this ???

[wysota]

This forum is not a compiler. You have a compiler on your own machine. The compiler tells you there is not "insertItem" method that takes a string in QComboBox so don't use it.There is a insertItem method taking two arguments -- an index and a string. There is also an addItem() method that takes a single string. I really don't see the intent behind posting every syntax error you get to this forum. If you get a syntax error because you are using methods which don't exist then correct your code to use existing methods.

[Harini]

which class supports QCamera properties in Qt 4.7