[Qt-interest] How to print out widgets?

[Jason H]

Correcting/Adding to your code:
QPixmap pixmap(ui.tableWidget->height(), ui.tableWidget->width());
QPrinter printer;
...
printer->paintEngine()->drawPixmap(QRectf(0,0, pixmap.width(), pixmap.height(), pixmap)


Should work.



________________________________
From: M. Bashir Al-Noimi <admin at mbnoimi.net>
To: qt-interest at trolltech.com
Sent: Tue, June 15, 2010 7:34:00 PM
Subject: Re: [Qt-interest] How to print out widgets?

Oh please I just want a snippet. You gave me is a theoretically
solution I and couldn't find any functions can do what you said. I
spent more than 8 hours (I lost my mind now:'( ) and I didn't find any solution... just correct my
snippet or wrote new one please (don't take about chunk now I want to
make it works first):

QPrinterprinter; 
    printer.setPageSize(QPrinter::A4);
    printer.setResolution(600);
    QPrintDialog print(&printer , this);
    QPixmap pixmap(printer.paperSize(QPrinter::DevicePixel).toSize());
    QPainter painter(&pixmap);
    if(print.exec()== QPrintDialog::Accepted)
    {
        ui->tableWidget->setFixedWidth(250);
        ui->tableWidget->render(&pixmap, QPoint(100, 100));
        //I know this wrong line but I can't find a way for printing pixmap
        painter.begin(&printer);
    }

On 15/06/2010 11:58 م, Jason H wrote: 
> 
>Oh dear, don't do that! You'll get a HUGE chunk of memory that
>you don't need. 
>
>>1. use render() to the pixmap, like you have.
>>2. then use QPrinter/QPrintDevice to draw the pixmap on the printer at
>some coordinate (0,0?).  I believe you call this 'painter'
>
>>Between 1 and 2, you might want to scale the pixmap to account for DPI
>differences. (scaled(300/72.0))
>
>
>
>
________________________________
From: M.
>Bashir Al-Noimi <admin at mbnoimi.net>
>To: Jason H
><scorp1us at yahoo.com>
>Cc: qt-interest at trolltech.com
>Sent: Tue, June 15,
>2010 6:25:16 PM
>Subject: Re:
>[Qt-interest] How to print out widgets?
>
>>On 15/06/2010 06:02 م, Jason H wrote:
> 
>I would probably try not rendering directly to a printer, bu
>>rather a pixmap, that is then scaled to the printer. It is likely that
>>the drawing commands to the printer did not translate properly.
>>Printers deal with bitmaps, text, or vectors, and there are numerous
>>quirks to them. By capturing it as a pixmap first, you'll then load an
>>image to the printer, rather than some mixed-mode rendering. I'd expect
>>render() to try a combination of vectors and bitmaps. Also, coordinate
>>spaces are different. 
>>
>>>>So capture as an image, then print the image.
>>
>I got you idea but I don't know how to print the image itself usual
>widgets has render or print functions where images don't, so could you
>please give a tiny snippet?
>
>>PS.
>>I looked into this issue in the archive and discoverd that all related
>discussions threads not completed.
>>I tried to use this but it's not working because painter does nothing
>(I need some corrections):
>QPrinterprinter; 
>    printer.setPageSize(QPrinter::A4);
>    printer.setResolution(600);
>    QPrintDialog print(&printer , this);
>    QPixmap pixmap(printer.paperSize(QPrinter::DevicePixel).toSize());
>    QPainter painter(&printer);
>    if(print.exec()== QPrintDialog::Accepted)
>    {
>        ui->statusBar->showMessage("printing in progress", 1000);
>        ui->tableWidget->setFixedWidth(250);
>        ui->tableWidget->render(&pixmap, QPoint(100, 100));
>    }
>
>
>
>>
>>
>>
>>
>>
>>
________________________________
From: >>M.
>>Bashir Al-Noimi <admin at mbnoimi.net>
>>To: qt-interest at trolltech.com
>>Sent: Tue, June 15,
>>2010 12:15:25 AM
>>Subject: >>[Qt-interest]
>>How to print out widgets?
>>
>>
>>Hi folks,
>>
>>
>>I tried to print
>>out
>>QTableWidget as shown below:
>>
>>
>>    QPrinterprinter; 
>>    printer.setPageSize(QPrinter::A4);
>>    QPrintDialog print(&printer , this);
>>    QPainter painter(&printer);
>>    if(print.exec()== QPrintDialog::Accepted)
>>    {
>>        ui->tableWidget->setFixedWidth(250);
>>        ui->tableWidget->render(&painter, QPoint(100, 100));
>>    }
>>
>>>>but it didn't print out anything and gave me the following error
>>message instead:
>>
>>
>>
>>QWin32PrintEngine::drawPixmap,
>>StretchBlt
>>failed (Not enough storage is available to process this
>>command.)
>>
>>
>>How I can fix this
>>issue?
>>
>>
>>
>>
>

-- 
Best Regards
Muhammad Bashir Al-Noimi
My Blog: http://mbnoimi.net



      
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