diff options
Diffstat (limited to 'src/gui/painting/qprinter.cpp')
| -rw-r--r-- | src/gui/painting/qprinter.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/gui/painting/qprinter.cpp b/src/gui/painting/qprinter.cpp index 413f4a1..5090b3a 100644 --- a/src/gui/painting/qprinter.cpp +++ b/src/gui/painting/qprinter.cpp @@ -285,6 +285,10 @@ void QPrinterPrivate::addToManualSetList(QPrintEngine::PrintEnginePropertyKey ke the printProgram() function can be used to specify the command or utility to use instead of the system default. + Note that setting parameters like paper size and resolution on an + invalid printer is undefined. You can use QPrinter::isValid() to + verify this before changing any parameters. + QPrinter supports a number of parameters, most of which can be changed by the end user through a \l{QPrintDialog}{print dialog}. In general, QPrinter passes these functions onto the underlying QPrintEngine. @@ -740,7 +744,7 @@ void QPrinter::setOutputFormat(OutputFormat format) #ifndef QT_NO_PDF Q_D(QPrinter); - if (d->outputFormat == format) + if (d->validPrinter && d->outputFormat == format) return; d->outputFormat = format; @@ -769,8 +773,8 @@ void QPrinter::setOutputFormat(OutputFormat format) if (def_engine) delete oldPrintEngine; - d->validPrinter = d->outputFormat == QPrinter::PdfFormat || d->outputFormat == QPrinter::PostScriptFormat; - + if (d->outputFormat == QPrinter::PdfFormat || d->outputFormat == QPrinter::PostScriptFormat) + d->validPrinter = true; #else Q_UNUSED(format); #endif @@ -849,7 +853,7 @@ void QPrinter::setPrinterName(const QString &name) Returns true if the printer currently selected is a valid printer in the system, or a pure PDF/PostScript printer; otherwise returns false. - To detect other failures check the output of QPainter::begin() or QPainter::nextPage(). + To detect other failures check the output of QPainter::begin() or QPrinter::newPage(). \snippet doc/src/snippets/printing-qprinter/errors.cpp 0 |