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Print: display an error message if no printers are found

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When pressing Print or Preview from the PrintDialog, we need
to first check if there are printers installed. If not
we abort and show an error message.

This is needed because if no printers are installed,
things like the reported page height could be zero and
the profile and table print code in PrintLayout will
break.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Lubomir I. Ivanov 2014-08-04 19:32:13 +03:00 • committed by Dirk Hohndel
parent 1a8dd659ca
commit 69676b08fb
2 changed files with 21 additions and 0 deletions
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20
qt-ui/printdialog.cpp
View file

@ -11,6 +11,8 @@
#include <QPrintPreviewDialog>
#include <QPrintDialog>
#include <QShortcut>
#include <QPrinterInfo>
#include <QMessageBox>
PrintDialog::PrintDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f)
{
@ -65,8 +67,24 @@ PrintDialog::PrintDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f
connect(quit, SIGNAL(activated()), parent, SLOT(close()));
}
bool PrintDialog::checkForAvailablePrinters(void)
{
QList<QPrinterInfo> list = QPrinterInfo::availablePrinters();
if (!list.length()) {
QMessageBox msgBox;
msgBox.setIcon(QMessageBox::Critical);
msgBox.setText(tr("Subsurface cannot find installed printers on this system!"));
msgBox.setWindowIcon(QIcon(":subsurface-icon"));
msgBox.exec();
return false;
}
return true;
}
void PrintDialog::previewClicked(void)
{
if (!checkForAvailablePrinters())
return;
QPrintPreviewDialog previewDialog(&printer, this);
connect(&previewDialog, SIGNAL(paintRequested(QPrinter *)), this, SLOT(onPaintRequested(QPrinter *)));
previewDialog.exec();
@ -74,6 +92,8 @@ void PrintDialog::previewClicked(void)
void PrintDialog::printClicked(void)
{
if (!checkForAvailablePrinters())
return;
QPrintDialog printDialog(&printer, this);
if (printDialog.exec() == QDialog::Accepted){
printLayout->print();

1
qt-ui/printdialog.h
View file

@ -18,6 +18,7 @@ public:
explicit PrintDialog(QWidget *parent = 0, Qt::WindowFlags f = 0);
private:
bool checkForAvailablePrinters(void);
PrintOptions *optionsWidget;
PrintLayout *printLayout;
QProgressBar *progressBar;