Print: improve table printing by using QTableView

The current QTextDocument implementation is slow due to
HTML parsing. By using QTableView with QAbstractTableModel
we boost the performance of the table print drastically.
This patch completely replaces the old solution.

There is a hidden QTableView widget which is populated
with all data and rendered using a QPainter attached to
the printer device.

A couple of new classes are added in models.h/cpp
that handle the table print model and these are then used
in printlayout.h/cpp.

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

1 files changed, 106 insertions, 0 deletions

diff --git a/qt-ui/models.cpp b/qt-ui/models.cpp
index 0af5c7019..25429154f 100644
--- a/qt-ui/models.cpp
+++ b/qt-ui/models.cpp
@@ -1438,3 +1438,109 @@ void YearlyStatisticsModel::update_yearly_stats()
 		item->parent = rootItem;
 	}
 }
+
+/*#################################################################
+ * #
+ * #	Table Print Model
+ * #
+ * ################################################################
+ */
+TablePrintModel::TablePrintModel()
+{
+	columns = 7;
+	rows = 0;
+}
+
+TablePrintModel::~TablePrintModel()
+{
+	for (int i = 0; i < list.size(); i++)
+		delete list.at(i);
+}
+
+void TablePrintModel::insertRow(int index)
+{
+	struct TablePrintItem *item = new struct TablePrintItem();
+	item->colorBackground = 0xffffffff;
+	if (index == -1) {
+		beginInsertRows(QModelIndex(), rows, rows);
+		list.append(item);
+	} else {
+		beginInsertRows(QModelIndex(), index, index);
+		list.insert(index, item);
+	}
+	endInsertRows();
+	rows++;
+}
+
+void TablePrintModel::callReset()
+{
+	reset();
+}
+
+QVariant TablePrintModel::data(const QModelIndex &index, int role) const
+{
+	if (!index.isValid())
+		return QVariant();
+	if (role == Qt::BackgroundRole)
+		return QColor(list.at(index.row())->colorBackground);
+	if (role == Qt::DisplayRole)
+		switch (index.column()) {
+			case 0:
+				return list.at(index.row())->number;
+			case 1:
+				return list.at(index.row())->date;
+			case 2:
+				return list.at(index.row())->depth;
+			case 3:
+				return list.at(index.row())->duration;
+			case 4:
+				return list.at(index.row())->divemaster;
+			case 5:
+				return list.at(index.row())->buddy;
+			case 6:
+				return list.at(index.row())->location;
+		}
+	return QVariant();
+}
+
+bool TablePrintModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if (index.isValid()) {
+		if (role == Qt::DisplayRole) {
+			switch (index.column()) {
+			case 0:
+				list.at(index.row())->number = value.toString();
+			case 1:
+				list.at(index.row())->date = value.toString();
+			case 2:
+				list.at(index.row())->depth = value.toString();
+			case 3:
+				list.at(index.row())->duration = value.toString();
+			case 4:
+				list.at(index.row())->divemaster = value.toString();
+			case 5:
+				list.at(index.row())->buddy = value.toString();
+			case 6:
+				list.at(index.row())->location = value.toString();
+			}
+			return true;
+		}
+		if (role == Qt::BackgroundRole) {
+			list.at(index.row())->colorBackground = value.value<unsigned int>();
+			return true;
+		}
+	}
+	return false;
+}
+
+int TablePrintModel::rowCount(const QModelIndex &parent) const
+{
+	Q_UNUSED(parent);
+	return rows;
+}
+
+int TablePrintModel::columnCount(const QModelIndex &parent) const
+{
+	Q_UNUSED(parent);
+	return columns;
+}