statistics: add count property to chart list

In order to be able to correctly size the chart type popup, we'll need
access to the total count or rows as a property that signals changes to
QML.

The hack to use rowCount() as the READ function requires that rowCount()
can be called without argument, therefore the addition of a default
parent.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

2 files changed, 9 insertions, 2 deletions

diff --git a/stats/chartlistmodel.cpp b/stats/chartlistmodel.cpp
index bce54ce25..7f7afe4d0 100644
--- a/stats/chartlistmodel.cpp
+++ b/stats/chartlistmodel.cpp
@@ -7,7 +7,7 @@
 #include <QPainter>
 
 ChartListModel::ChartListModel() :
-	itemFont(defaultModelFont()), 
+	itemFont(defaultModelFont()),
 	headerFont(itemFont.family(), itemFont.pointSize(), itemFont.weight(), true)
 {
 	QFontMetrics fm(itemFont);
@@ -127,5 +127,6 @@ int ChartListModel::update(const StatsState::ChartList &charts)
 		items.push_back({ false, chart.subtypeName, fullName, chart.subtype, chart.id, chart.warning });
 	}
 	endResetModel();
+	emit countChanged();
 	return res;
 }
diff --git a/stats/chartlistmodel.h b/stats/chartlistmodel.h
index 701dca50e..70484e0ad 100644
--- a/stats/chartlistmodel.h
+++ b/stats/chartlistmodel.h
@@ -24,6 +24,12 @@ public:
 	static const constexpr int IsHeaderRole = Qt::UserRole + 2;
 	static const constexpr int IconRole = Qt::UserRole + 3;
 	static const constexpr int IconSizeRole = Qt::UserRole + 4;
+
+	Q_PROPERTY(int count READ rowCount NOTIFY countChanged)
+
+signals:
+	void countChanged();
+
 private:
 	struct Item {
 		bool isHeader;
@@ -45,7 +51,7 @@ private:
 	QFont headerFont;
 	std::vector<Item> items;
 	QHash<int, QByteArray> roleNames() const override;
-	int rowCount(const QModelIndex &parent) const override;
+	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 	QVariant data(const QModelIndex &index, int role) const override;
 	Qt::ItemFlags flags(const QModelIndex &index) const override;
 	void initIcon(ChartSubType type, const char *name, int iconSize);