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 );
}

[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);
}

[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 );
}
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);

[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 );
}

[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);
I thought that:


onepdf->SetPage(nowrender,QSize(doc->getPageWidth(nowrender),doc->getPageHeight(nowrender)));
was already setting the size of onepdf.

EDIT:
Shouldn't you use:


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

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