QStackedWidget fill Postscript image And scroll problem

[patrik08]

I wand to display one ore moore QStackedWidget to paint inside a postscript image or a pdf...

the device to paint work but how i can enable scroll this QStackedWidget

class QPdf : public QMainWindow
{
 
//
public: 
    QPdf(const QString pdf_file)  {
 
setWindowTitle ( tr( "Pdf and Postscript display.. file %1 " ).arg(pdf_file));
pages = 0;   
spage = new QStackedWidget(this);
 
        GString *ownerPW, *userPW;
        doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW); 
 
        if (doc->isOk()) {
        qDebug() << "### doc->isOk() "<< doc->isOk();
        pages = doc->getNumPages();
        qDebug() << "### pages "<< pages;
 
            for (int i=0;i<pages;i++) {
                int nowrender = i + 1;  /* render page pdf nr. */
                qDebug() << "### page item  "<< nowrender;
                SplashOutputDev *onepdf = new SplashOutputDev(QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                /////onepdf->InPaint(doc->getBitmap(nowrender));
                spage->addWidget(onepdf);
                }
 
    }
setCentralWidget ( spage ); 
}

class QPdf : public QMainWindow
{
    
//
public: 
    QPdf(const QString pdf_file)  {
        
setWindowTitle ( tr( "Pdf and Postscript display.. file %1 " ).arg(pdf_file));
pages = 0;   
spage = new QStackedWidget(this);
        
        GString *ownerPW, *userPW;
        doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW); 

        if (doc->isOk()) {
        qDebug() << "### doc->isOk() "<< doc->isOk();
        pages = doc->getNumPages();
        qDebug() << "### pages "<< pages;
            
            for (int i=0;i<pages;i++) {
                int nowrender = i + 1;  /* render page pdf nr. */
                qDebug() << "### page item  "<< nowrender;
                SplashOutputDev *onepdf = new SplashOutputDev(QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                /////onepdf->InPaint(doc->getBitmap(nowrender));
                spage->addWidget(onepdf);
                }
                
    }
setCentralWidget ( spage ); 
}

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[marcel]

Add the SplashOutputDev widgets to QScrollAreas, and add these scroll areas to the QStackedWidget, instead of adding directly the SplashOutputDev widgets.

This way you will get your scroll.

Regards

[marcel]

You can use QScrollArea::sertWidget() to achieve this.

BTW: are you using XPdf?

Regards

[patrik08]

You can use QScrollArea::sertWidget() to achieve this.

BTW: are you using XPdf?

Original is XPDF but i take from opie-1.2.2.tr qt3 (qtfriendly)

http://opie.handhelds.org/

Yes .. :-) is running on window on mingw compiler ... i wand to diplay fast latex result whittout acroread and paint inside point/pixel scala....

Have you a ready QT4 class to use? for my use? or a better doc from XPDF?

[marcel]

No, I was just asking... I thought maybe there is another pdf library out there
I am working on a vector-drawing app and I plan to embed xpdf( for pdf loading ) sometimes in a near future.

Have you tried using QScrollArea?

[patrik08]

No, I was just asking... I thought maybe there is another pdf library out there
I am working on a vector-drawing app and I plan to embed xpdf( for pdf loading ) sometimes in a near future.

Have you tried using QScrollArea?

Yes ... but not runn .... i suppose i must rewrite a wrapper to paint inside ...
but now here is europe time ... and i quit my code.... otherwise i paint the QScrollArea...

/* class SplashOutputDev : public QWidget  */
 
SplashOutputDev::SplashOutputDev( QSize qo )
{
p = qo;
qDebug() << "### size "<< p;
scroll = new QScrollArea();
scroll->setBackgroundRole(QPalette::Dark);
scroll->ensureVisible(p.width(),p.height(),100,100);
scroll->setWidget(this);
}

/* class SplashOutputDev : public QWidget  */

SplashOutputDev::SplashOutputDev( QSize qo )
{
p = qo;
qDebug() << "### size "<< p;
scroll = new QScrollArea();
scroll->setBackgroundRole(QPalette::Dark);
scroll->ensureVisible(p.width(),p.height(),100,100);
scroll->setWidget(this);
}

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[marcel]

No, this is not what i meant...
Try this:

class QPdf : public QMainWindow
      {
 
      //
      public:
          QPdf(const QString pdf_file)  {
 
      setWindowTitle ( tr( "Pdf and Postscript display.. file %1 " ).arg(pdf_file));
      pages = 0;   
      spage = new QStackedWidget(this);
 
              GString *ownerPW, *userPW;
              doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW);
 
              if (doc->isOk()) {
              qDebug() << "### doc->isOk() "<< doc->isOk();
              pages = doc->getNumPages();
              qDebug() << "### pages "<< pages;
 
                  for (int i=0;i<pages;i++) {
                      int nowrender = i + 1;  /* render page pdf nr. */
                      qDebug() << "### page item  "<< nowrender;
                      SplashOutputDev *onepdf = new SplashOutputDev(QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                      QScrollArea* scrollarea = new QScrollArea( spage );
                      scrollarea->setWidget( onepdf );
                      /////onepdf->InPaint(doc->getBitmap(nowrender));
                      spage->addWidget(scrollarea);
                      }
 
          }
      setCentralWidget ( spage );
      }

class QPdf : public QMainWindow
      {
         
      //
      public:
          QPdf(const QString pdf_file)  {
             
      setWindowTitle ( tr( "Pdf and Postscript display.. file %1 " ).arg(pdf_file));
      pages = 0;   
      spage = new QStackedWidget(this);
             
              GString *ownerPW, *userPW;
              doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW);
       
              if (doc->isOk()) {
              qDebug() << "### doc->isOk() "<< doc->isOk();
              pages = doc->getNumPages();
              qDebug() << "### pages "<< pages;
                 
                  for (int i=0;i<pages;i++) {
                      int nowrender = i + 1;  /* render page pdf nr. */
                      qDebug() << "### page item  "<< nowrender;
                      SplashOutputDev *onepdf = new SplashOutputDev(QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                      QScrollArea* scrollarea = new QScrollArea( spage );
                      scrollarea->setWidget( onepdf );
                      /////onepdf->InPaint(doc->getBitmap(nowrender));
                      spage->addWidget(scrollarea);
                      }
                     
          }
      setCentralWidget ( spage );
      }

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Here I add the SplashOutputDev widget to a scroll area, and then I add the scroll area to the QStackedWidget.
It should work like this.

Regards

[marcel]

There is no need to paint to a scroll area. You can keep your code as it is, and ad scroll areas with minimal changes.

Regards

[patrik08]

There is no need to paint to a scroll area. You can keep your code as it is, and ad scroll areas with minimal changes.

Regards

I look on my image displayer that display a widget and inside image on a FlowLayout that runn and scroll is visible... to append and remove image ... on qlist ...*class

but now i must display page and not tumbnail ....

void Image_Base::Load_Connector()  {
 
comio = new Comandi();  /* top left widget command button*/
 
scroll = new QScrollArea(this);
    scroll->setBackgroundRole(QPalette::Dark);
    scroll->setMinimumWidth(500);
    wrapper = new QWidget(this);
    flow = new FlowLayout(wrapper);
    flow ->addWidget(comio);
    wrapper->setLayout(flow);
    scroll->setWidget(wrapper);
 
}
 
flow ->addWidget(imagedisplay);

void Image_Base::Load_Connector()  {

comio = new Comandi();  /* top left widget command button*/

scroll = new QScrollArea(this);
    scroll->setBackgroundRole(QPalette::Dark);
    scroll->setMinimumWidth(500);
    wrapper = new QWidget(this);
    flow = new FlowLayout(wrapper);
    flow ->addWidget(comio);
    wrapper->setLayout(flow);
    scroll->setWidget(wrapper);

}

flow ->addWidget(imagedisplay);

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[marcel]

Yes, and the code I've shown you should work just fine.
Isn't SplashOutputDev the widget in which you are rendering the current pdf page?
I assumed it was when I answered. Adding it to a scroll area and then adding the scroll area to the stacked widget will work.

You will not need any additional layouts or anything else...

Regards

[patrik08]

Yes, and the code I've shown you should work just fine.
Isn't SplashOutputDev the widget in which you are rendering the current pdf page?
I assumed it was when I answered. Adding it to a scroll area and then adding the scroll area to the stacked widget will work.

You will not need any additional layouts or anything else...

Regards

now is run tanks...

public: 
    QPdf(const QString pdf_file)  {
 
setWindowTitle ( tr( "Pdf display.. file %1 " ).arg(pdf_file));
pages = 0;   
spage = new QStackedWidget(this);
 
        GString *ownerPW, *userPW;
        doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW); 
 
        if (userPW) {
        delete userPW;
        }
        if (ownerPW) {
        delete ownerPW;
        }
        if (doc->isOk()) {
        qDebug() << "### doc->isOk() "<< doc->isOk();
        pages = doc->getNumPages();
        qDebug() << "### pages "<< pages;
 
            for (int i=0;i<pages;i++) {
                int nowrender = i + 1;  /* render page pdf nr. */
                qDebug() << "### page item  "<< nowrender;
                QScrollArea *src = new QScrollArea(spage);
                SplashOutputDev *onepdf = new SplashOutputDev(src);
                /////onepdf->InPaint(doc->getBitmap(nowrender));
                onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                src->setWidget(onepdf);
                onepdf->setMinimumHeight(doc->getPageHeight(nowrender) + 1);
                onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);
                src->setBackgroundRole(QPalette::Dark);
                spage->addWidget(src);
                }
 
        spage->setCurrentIndex(0);  /* jump first */
 
    }
setCentralWidget ( spage ); 
}

public: 
    QPdf(const QString pdf_file)  {
        
setWindowTitle ( tr( "Pdf display.. file %1 " ).arg(pdf_file));
pages = 0;   
spage = new QStackedWidget(this);
        
        GString *ownerPW, *userPW;
        doc = new PDFDoc(new GString(pdf_file),ownerPW, userPW); 
        
        if (userPW) {
        delete userPW;
        }
        if (ownerPW) {
        delete ownerPW;
        }
        if (doc->isOk()) {
        qDebug() << "### doc->isOk() "<< doc->isOk();
        pages = doc->getNumPages();
        qDebug() << "### pages "<< pages;
            
            for (int i=0;i<pages;i++) {
                int nowrender = i + 1;  /* render page pdf nr. */
                qDebug() << "### page item  "<< nowrender;
                QScrollArea *src = new QScrollArea(spage);
                SplashOutputDev *onepdf = new SplashOutputDev(src);
                /////onepdf->InPaint(doc->getBitmap(nowrender));
                onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
                src->setWidget(onepdf);
                onepdf->setMinimumHeight(doc->getPageHeight(nowrender) + 1);
                onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);
                src->setBackgroundRole(QPalette::Dark);
                spage->addWidget(src);
                }
                
        spage->setCurrentIndex(0);  /* jump first */
                
    }
setCentralWidget ( spage ); 
}

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[marcel]

Nice...

onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
src->setWidget(onepdf);
onepdf->setMinimumHeight(doc->getPageHeight(nowrender) + 1);
onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);
src->setBackgroundRole(QPalette::Dark);

onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
src->setWidget(onepdf);
onepdf->setMinimumHeight(doc->getPageHeight(nowrender) + 1);
onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);
src->setBackgroundRole(QPalette::Dark);

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I thought that:

onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));

onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));

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was already setting the size of onepdf.

EDIT:
Shouldn't you use:

onepdf->setMinimumHeight(doc->getPageWidth(nowrender) + 1);
onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);

onepdf->setMinimumHeight(doc->getPageWidth(nowrender) + 1);
onepdf->setMinimumWidth(doc->getPageHeight(nowrender) + 50);

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You were setting page height for both minimum width and height.
Regards