Printing: Add Printer class that holds the rendering logic.

Render Html pages into a QWebView then print it using QPainter. the
Printer::print() is called that prepare the HTML file to be rendered by
the QWebView.
Printer::render() will do the rendering task.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/printer.cpp b/printer.cpp
new file mode 100644
index 000000000..01c1f5546
--- /dev/null
+++ b/printer.cpp
@@ -0,0 +1,48 @@
+#include "printer.h"
+#include "templatelayout.h"
+
+#include <QtWebKitWidgets>
+#include <QPainter>
+
+#define A4_300DPI_WIDTH 2480
+#define A4_300DPI_HIGHT 3508
+
+Printer::Printer(QPrinter *printer)
+{
+	this->printer = printer;
+
+	//override these settings for now.
+	printer->setFullPage(true);
+	printer->setOrientation(QPrinter::Portrait);
+	printer->setPaperSize(QPrinter::A4);
+	printer->setPrintRange(QPrinter::AllPages);
+	printer->setResolution(300);
+}
+
+void Printer::render()
+{
+	QPainter painter;
+	QSize size(A4_300DPI_WIDTH, A4_300DPI_HIGHT);
+	painter.begin(printer);
+	painter.setRenderHint(QPainter::Antialiasing);
+	painter.setRenderHint(QPainter::SmoothPixmapTransform);
+
+	webView->page()->setViewportSize(size);
+
+	int Pages = ceil((float)webView->page()->mainFrame()->contentsSize().rheight() / A4_300DPI_HIGHT);
+	for (int i = 0; i < Pages; i++) {
+		webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer);
+		webView->page()->mainFrame()->scroll(0, A4_300DPI_HIGHT);
+		if (i < Pages - 1)
+			printer->newPage();
+	}
+	painter.end();
+}
+
+void Printer::print()
+{
+	TemplateLayout t;
+	webView = new QWebView();
+	webView->setHtml(t.generate());
+	render();
+}