Print: initial implementation of the table print

PrintLayout for now only handles the table print,
while the data output itself is work in progress.
For now there is a simple HTML/CSS table logic based
on QTextDocument. There is an iterative algorithm
which listens for a page increase and adds a heading
on top of the new page.

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

qt-ui/printlayout.cpp

@@ -1,6 +1,9 @@
+#include <QDebug>
 #include <QPainter>
 #include <QDesktopWidget>
 #include <QApplication>
+#include <QTextDocument>
+#include <QAbstractTextDocumentLayout>
 #include "mainwindow.h"
 #include "printlayout.h"
 
@@ -19,12 +22,18 @@ PrintLayout::PrintLayout(PrintDialog *dialogPtr, QPrinter *printerPtr, struct op
 	dialog = dialogPtr;
 	printer = printerPtr;
 	printOptions = optionsPtr;
+	// painter = new QPainter(printer);
 }
 
 void PrintLayout::print()
 {
 	// we call setup each time to check if the printer properties have changed
 	setup();
+
+	// temp / debug
+	printTable();
+	return;
+	// ------------
 	switch (printOptions->type) {
 	case options::PRETTY:
 		printSixDives();
@@ -63,5 +72,52 @@ void PrintLayout::printTwoDives()
 
 void PrintLayout::printTable()
 {
-	// nop
+	QTextDocument doc;
+	QSizeF pageSize;
+    pageSize.setWidth(pageRect.width());
+    pageSize.setHeight(pageRect.height());
+    doc.setPageSize(pageSize);
+
+	QString styleSheet = "<style type='text/css'>" \
+		"table { border-width: 1px; border-style: solid; border-color: black; }" \
+		"th { font-weight: bold; font-size: large; padding: 3px 10px 3px 10px; }" \
+		"td { padding: 3px 10px 3px 10px; }" \
+		"</style>";
+	// setDefaultStyleSheet() doesn't work here?
+	QString htmlText = styleSheet + "<table cellspacing='0' width='100%'>";
+	QString htmlTextPrev;
+	int pageCountNew = 1, pageCount = 1;
+	bool insertHeading = true;
+
+	while (pageCount < 3) { // should go trough dives (or selected) instead
+		if (insertHeading) {
+			htmlText += insertTableHeadingRow();
+			insertHeading = false;
+		}
+		doc.setHtml(htmlText);
+		pageCount = doc.pageCount();
+		htmlTextPrev = htmlText;
+		htmlText += insertTableDataRow();
+		doc.setHtml(htmlText);
+		pageCountNew = doc.pageCount();
+		// if the page count increases here we revert and add a heading instead
+		if (pageCountNew > pageCount) {
+			htmlText = htmlTextPrev;
+			doc.setHtml(htmlText);
+			insertHeading = true;
+		}
+	}
+	htmlText += "</table>";
+	doc.setHtml(htmlText);
+	doc.print(printer);
+}
+
+QString PrintLayout::insertTableHeadingRow()
+{
+	return "<tr><th>TITLE</th><th>TITLE 2</th></tr>";
+}
+
+QString PrintLayout::insertTableDataRow()
+{
+	return "<tr><td>hello</td></tr><tr><td>hello</td></tr>";
 }

qt-ui/printlayout.h

@@ -19,7 +19,7 @@ private:
 	QPrinter *printer;
 	struct options *printOptions;
 
-	QPainter painter;
+	QPainter *painter;
 	int screenDpiX, screenDpiY, printerDpi;
 	qreal scaleX, scaleY;
 	QRect pageRect;
@@ -28,6 +28,8 @@ private:
 	void printSixDives();
 	void printTwoDives();
 	void printTable();
+	QString insertTableHeadingRow();
+	QString insertTableDataRow();
 };
 
 #endif