Move qt-ui to desktop-widgets

Since we have now destkop and mobile versions, 'qt-ui' was a very
poor name choice for a folder that contains only destkop-enabled
widgets.

Also, move the graphicsview-common.h/cpp to subsurface-core because
it doesn't depend on qgraphicsview, it merely implements all the
colors that we use throughout Subsurface, and we will use colors on both
desktop and mobile versions

Same thing applies for metrics.h/cpp

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 273 insertions, 0 deletions

diff --git a/desktop-widgets/printer.cpp b/desktop-widgets/printer.cpp
new file mode 100644
index 000000000..f0197d446
--- /dev/null
+++ b/desktop-widgets/printer.cpp
@@ -0,0 +1,273 @@
+#include "printer.h"
+#include "templatelayout.h"
+#include "statistics.h"
+#include "helpers.h"
+
+#include <algorithm>
+#include <QtWebKitWidgets>
+#include <QPainter>
+#include <QWebElementCollection>
+#include <QWebElement>
+
+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();
+}
+
+Printer::~Printer()
+{
+	delete webView;
+}
+
+void Printer::putProfileImage(QRect profilePlaceholder, QRect viewPort, QPainter *painter, struct dive *dive, QPointer<ProfileWidget2> profile)
+{
+	int x = profilePlaceholder.x() - viewPort.x();
+	int y = profilePlaceholder.y() - viewPort.y();
+	// use the placeHolder and the viewPort position to calculate the relative position of the dive profile.
+	QRect pos(x, y, profilePlaceholder.width(), profilePlaceholder.height());
+	profile->plotDive(dive, true);
+
+	if (!printOptions->color_selected) {
+		QImage image(pos.width(), pos.height(), QImage::Format_ARGB32);
+		QPainter imgPainter(&image);
+		imgPainter.setRenderHint(QPainter::Antialiasing);
+		imgPainter.setRenderHint(QPainter::SmoothPixmapTransform);
+		profile->render(&imgPainter, QRect(0, 0, pos.width(), pos.height()));
+		imgPainter.end();
+
+		// convert QImage to grayscale before rendering
+		for (int i = 0; i < image.height(); i++) {
+			QRgb *pixel = reinterpret_cast<QRgb *>(image.scanLine(i));
+			QRgb *end = pixel + image.width();
+			for (; pixel != end; pixel++) {
+				int gray_val = qGray(*pixel);
+				*pixel = QColor(gray_val, gray_val, gray_val).rgb();
+			}
+		}
+
+		painter->drawImage(pos, image);
+	} else {
+		profile->render(painter, pos);
+	}
+}
+
+void Printer::flowRender()
+{
+	// add extra padding at the bottom to pages with height not divisible by view port
+	int paddingBottom = pageSize.height() - (webView->page()->mainFrame()->contentsSize().height() % pageSize.height());
+	QString styleString = QString::fromUtf8("padding-bottom: ") + QString::number(paddingBottom) + "px;";
+	webView->page()->mainFrame()->findFirstElement("body").setAttribute("style", styleString);
+
+	// render the Qwebview
+	QPainter painter;
+	QRect viewPort(0, 0, 0, 0);
+	painter.begin(paintDevice);
+	painter.setRenderHint(QPainter::Antialiasing);
+	painter.setRenderHint(QPainter::SmoothPixmapTransform);
+
+	// get all references to dontbreak divs
+	int start = 0, end = 0;
+	int fullPageResolution = webView->page()->mainFrame()->contentsSize().height();
+	QWebElementCollection dontbreak = webView->page()->mainFrame()->findAllElements(".dontbreak");
+	foreach (QWebElement dontbreakElement, dontbreak) {
+		if ((dontbreakElement.geometry().y() + dontbreakElement.geometry().height()) - start < pageSize.height()) {
+			// One more element can be placed
+			end = dontbreakElement.geometry().y() + dontbreakElement.geometry().height();
+		} else {
+			// fill the page with background color
+			QRect fullPage(0, 0, pageSize.width(), pageSize.height());
+			QBrush fillBrush(templateOptions->color_palette.color1);
+			painter.fillRect(fullPage, fillBrush);
+			QRegion reigon(0, 0, pageSize.width(), end - start);
+			viewPort.setRect(0, start, pageSize.width(), end - start);
+
+			// render the base Html template
+			webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
+
+			// scroll the webview to the next page
+			webView->page()->mainFrame()->scroll(0, dontbreakElement.geometry().y() - start);
+
+			// rendering progress is 4/5 of total work
+			emit(progessUpdated((end * 80.0 / fullPageResolution) + done));
+
+			// add new pages only in print mode, while previewing we don't add new pages
+			if (printMode == Printer::PRINT)
+				static_cast<QPrinter*>(paintDevice)->newPage();
+			else {
+				painter.end();
+				return;
+			}
+			start = dontbreakElement.geometry().y();
+		}
+	}
+	// render the remianing page
+	QRect fullPage(0, 0, pageSize.width(), pageSize.height());
+	QBrush fillBrush(templateOptions->color_palette.color1);
+	painter.fillRect(fullPage, fillBrush);
+	QRegion reigon(0, 0, pageSize.width(), end - start);
+	webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer, reigon);
+
+	painter.end();
+}
+
+void Printer::render(int Pages = 0)
+{
+	// keep original preferences
+	QPointer<ProfileWidget2> profile = MainWindow::instance()->graphics();
+	int profileFrameStyle = profile->frameStyle();
+	int animationOriginal = prefs.animation_speed;
+	double fontScale = profile->getFontPrintScale();
+	double printFontScale = 1.0;
+
+	// apply printing settings to profile
+	profile->setFrameStyle(QFrame::NoFrame);
+	profile->setPrintMode(true, !printOptions->color_selected);
+	profile->setToolTipVisibile(false);
+	prefs.animation_speed = 0;
+
+	// render the Qwebview
+	QPainter painter;
+	QRect viewPort(0, 0, pageSize.width(), pageSize.height());
+	painter.begin(paintDevice);
+	painter.setRenderHint(QPainter::Antialiasing);
+	painter.setRenderHint(QPainter::SmoothPixmapTransform);
+
+	// get all refereces to diveprofile class in the Html template
+	QWebElementCollection collection = webView->page()->mainFrame()->findAllElements(".diveprofile");
+
+	QSize originalSize = profile->size();
+	if (collection.count() > 0) {
+		printFontScale = (double)collection.at(0).geometry().size().height() / (double)profile->size().height();
+		profile->resize(collection.at(0).geometry().size());
+	}
+	profile->setFontPrintScale(printFontScale);
+
+	int elemNo = 0;
+	for (int i = 0; i < Pages; i++) {
+		// render the base Html template
+		webView->page()->mainFrame()->render(&painter, QWebFrame::ContentsLayer);
+
+		// render all the dive profiles in the current page
+		while (elemNo < collection.count() && collection.at(elemNo).geometry().y() < viewPort.y() + viewPort.height()) {
+			// dive id field should be dive_{{dive_no}} se we remove the first 5 characters
+			QString diveIdString = collection.at(elemNo).attribute("id");
+			int diveId = diveIdString.remove(0, 5).toInt(0, 10);
+			putProfileImage(collection.at(elemNo).geometry(), viewPort, &painter, get_dive_by_uniq_id(diveId), profile);
+			elemNo++;
+		}
+
+		// scroll the webview to the next page
+		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));
+		if (i < Pages - 1 && printMode == Printer::PRINT)
+			static_cast<QPrinter*>(paintDevice)->newPage();
+	}
+	painter.end();
+
+	// return profle settings
+	profile->setFrameStyle(profileFrameStyle);
+	profile->setPrintMode(false);
+	profile->setFontPrintScale(fontScale);
+	profile->setToolTipVisibile(true);
+	profile->resize(originalSize);
+	prefs.animation_speed = animationOriginal;
+
+	//replot the dive after returning the settings
+	profile->plotDive(0, true);
+}
+
+//value: ranges from 0 : 100 and shows the progress of the templating engine
+void Printer::templateProgessUpdated(int value)
+{
+	done = value / 5; //template progess if 1/5 of total work
+	emit progessUpdated(done);
+}
+
+void Printer::print()
+{
+	// we can only print if "PRINT" mode is selected
+	if (printMode != Printer::PRINT) {
+		return;
+	}
+
+
+	QPrinter *printerPtr;
+	printerPtr = static_cast<QPrinter*>(paintDevice);
+
+	TemplateLayout t(printOptions, templateOptions);
+	connect(&t, SIGNAL(progressUpdated(int)), this, SLOT(templateProgessUpdated(int)));
+	dpi = printerPtr->resolution();
+	//rendering resolution = selected paper size in inchs * printer dpi
+	pageSize.setHeight(qCeil(printerPtr->pageRect(QPrinter::Inch).height() * dpi));
+	pageSize.setWidth(qCeil(printerPtr->pageRect(QPrinter::Inch).width() * dpi));
+	webView->page()->setViewportSize(pageSize);
+	webView->page()->mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
+	// export border width with at least 1 pixel
+	templateOptions->border_width = std::max(1, pageSize.width() / 1000);
+	if (printOptions->type == print_options::DIVELIST) {
+		webView->setHtml(t.generate());
+	} else if (printOptions->type == print_options::STATISTICS ) {
+		webView->setHtml(t.generateStatistics());
+	}
+	if (printOptions->color_selected && printerPtr->colorMode()) {
+		printerPtr->setColorMode(QPrinter::Color);
+	} else {
+		printerPtr->setColorMode(QPrinter::GrayScale);
+	}
+	// apply user settings
+	int divesPerPage;
+
+	// get number of dives per page from data-numberofdives attribute in the body of the selected template
+	bool ok;
+	divesPerPage = webView->page()->mainFrame()->findFirstElement("body").attribute("data-numberofdives").toInt(&ok);
+	if (!ok) {
+		divesPerPage = 1; // print each dive in a single page if the attribute is missing or malformed
+		//TODO: show warning
+	}
+	int Pages;
+	if (divesPerPage == 0) {
+		flowRender();
+	} else {
+		Pages = qCeil(getTotalWork(printOptions) / (float)divesPerPage);
+		render(Pages);
+	}
+}
+
+void Printer::previewOnePage()
+{
+	if (printMode == PREVIEW) {
+		TemplateLayout t(printOptions, templateOptions);
+
+		pageSize.setHeight(paintDevice->height());
+		pageSize.setWidth(paintDevice->width());
+		webView->page()->setViewportSize(pageSize);
+		// initialize the border settings
+		templateOptions->border_width = std::max(1, pageSize.width() / 1000);
+		if (printOptions->type == print_options::DIVELIST) {
+			webView->setHtml(t.generate());
+		} else if (printOptions->type == print_options::STATISTICS ) {
+			webView->setHtml(t.generateStatistics());
+		}
+
+		bool ok;
+		int divesPerPage = webView->page()->mainFrame()->findFirstElement("body").attribute("data-numberofdives").toInt(&ok);
+		if (!ok) {
+			divesPerPage = 1; // print each dive in a single page if the attribute is missing or malformed
+			//TODO: show warning
+		}
+		if (divesPerPage == 0) {
+			flowRender();
+		} else {
+			render(1);
+		}
+	}
+}