Printing: add support for printing on any page size

Make page size and orientation customizable. The user can select
any page size and orientation and then the rendering resolution will
be calculated based on the selected preferences and the printer DPI.
The HTML templates must be responsive, also the font-size must be based
on the viewport width so that we don't lose quality.

Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

1 files changed, 10 insertions, 16 deletions

diff --git a/printer.cpp b/printer.cpp
index f21ff478d..9e5a34b57 100644
--- a/printer.cpp
+++ b/printer.cpp
@@ -6,20 +6,10 @@
 #include <QWebElementCollection>
 #include <QWebElement>
 
-#define A4_300DPI_WIDTH 2480
-#define A4_300DPI_HIGHT 3508
-
 Printer::Printer(QPrinter *printer, print_options *printOptions)
 {
 	this->printer = printer;
 	this->printOptions = printOptions;
-
-	//override these settings for now.
-	printer->setFullPage(true);
-	printer->setOrientation(QPrinter::Portrait);
-	printer->setPaperSize(QPrinter::A4);
-	printer->setPrintRange(QPrinter::AllPages);
-	printer->setResolution(300);
 	done = 0;
 }
 
@@ -51,12 +41,10 @@ void Printer::render()
 
 	// render the Qwebview
 	QPainter painter;
-	QSize size(A4_300DPI_WIDTH, A4_300DPI_HIGHT);
-	QRect viewPort(0, 0, size.width(), size.height());
+	QRect viewPort(0, 0, pageSize.width(), pageSize.height());
 	painter.begin(printer);
 	painter.setRenderHint(QPainter::Antialiasing);
 	painter.setRenderHint(QPainter::SmoothPixmapTransform);
-	webView->page()->setViewportSize(size);
 
 	int divesPerPage;
 	switch (printOptions->p_template) {
@@ -91,8 +79,8 @@ void Printer::render()
 		}
 
 		// scroll the webview to the next page
-		webView->page()->mainFrame()->scroll(0, size.height());
-		viewPort.adjust(0, size.height(), 0, size.height());
+		webView->page()->mainFrame()->scroll(0, pageSize.height());
+		viewPort.adjust(0, pageSize.height(), 0, pageSize.height());
 
 		// rendering progress is 4/5 of total work
 		emit(progessUpdated((i * 80.0 / Pages) + done));
@@ -123,8 +111,14 @@ void Printer::templateProgessUpdated(int value)
 void Printer::print()
 {
 	TemplateLayout t(printOptions);
-	connect(&t, SIGNAL(progressUpdated(int)), this, SLOT(templateProgessUpdated(int)));
 	webView = new QWebView();
+	connect(&t, SIGNAL(progressUpdated(int)), this, SLOT(templateProgessUpdated(int)));
+
+	dpi = printer->resolution();
+	//rendering resolution = selected paper size in inchs * printer dpi
+	pageSize.setHeight(printer->pageLayout().paintRect(QPageLayout::Inch).height() * dpi);
+	pageSize.setWidth(printer->pageLayout().paintRect(QPageLayout::Inch).width() * dpi);
+	webView->page()->setViewportSize(pageSize);
 	webView->setHtml(t.generate());
 	render();
 }