Printing: check for different printing modes

Add PRINT/PREVIEW print modes, check for printing modes before
casting.

We must pass a QPaintDevice with type QPixmap for previewing and
with type QPrinter for actual printing.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>

printer.cpp

@@ -6,11 +6,12 @@
 #include <QWebElementCollection>
 #include <QWebElement>
 
-Printer::Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions)
+Printer::Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions,  PrintMode printMode)
 {
 	this->paintDevice = paintDevice;
 	this->printOptions = printOptions;
 	this->templateOptions = templateOptions;
+	this->printMode = printMode;
 	dpi = 0;
 	done = 0;
 	webView = new QWebView();
@@ -80,7 +81,7 @@ void Printer::render(int Pages = 0)
 
 		// rendering progress is 4/5 of total work
 		emit(progessUpdated((i * 80.0 / Pages) + done));
-		if (i < Pages - 1)
+		if (i < Pages - 1 && printMode == Printer::PRINT)
 			static_cast<QPrinter*>(paintDevice)->newPage();
 	}
 	painter.end();
@@ -106,6 +107,11 @@ void Printer::templateProgessUpdated(int value)
 
 void Printer::print()
 {
+	// we can only print if "PRINT" mode is selected
+	if (printMode != Printer::PRINT) {
+		return;
+	}
+
 	QPrinter *printerPtr;
 	printerPtr = static_cast<QPrinter*>(paintDevice);
 

printer.h

@@ -13,12 +13,19 @@
 class Printer : public QObject {
 	Q_OBJECT
 
+public:
+	enum PrintMode {
+		PRINT,
+		PREVIEW
+	};
+
 private:
 	QPaintDevice *paintDevice;
 	QWebView *webView;
 	print_options *printOptions;
 	template_options *templateOptions;
 	QSize pageSize;
+	PrintMode printMode;
 	int done;
 	int dpi;
 	void render(int Pages);
@@ -28,7 +35,7 @@ private slots:
 	void templateProgessUpdated(int value);
 
 public:
-	Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions);
+	Printer(QPaintDevice *paintDevice, print_options *printOptions, template_options *templateOptions, PrintMode printMode);
 	~Printer();
 	void print();
 

qt-ui/printdialog.cpp

@@ -45,7 +45,7 @@ PrintDialog::PrintDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f
 	optionsWidget = new PrintOptions(this, &printOptions, &templateOptions);
 
 	// create a new printer object
-	printer = new Printer(&qprinter, &printOptions, &templateOptions);
+	printer = new Printer(&qprinter, &printOptions, &templateOptions, Printer::PRINT);
 
 	QVBoxLayout *layout = new QVBoxLayout(this);
 	setLayout(layout);