logic: remember graph zoom level on restart (issue #801) (#1099)

src/lib/settings/ApplicationSettings.cpp

@@ -678,6 +678,16 @@ void ApplicationSettings::setLastFilepickerLocation(const FilePath& path)
 	setValue<std::wstring>("user/last_filepicker_location", path.wstr());
 }
 
+float ApplicationSettings::getGraphZoomLevel() const
+{
+	return getValue<float>("user/graph_zoom_level", 1.0f);
+}
+
+void ApplicationSettings::setGraphZoomLevel(float zoomLevel)
+{
+	setValue<float>("user/graph_zoom_level", zoomLevel);
+}
+
 int ApplicationSettings::getPluginPort() const
 {
 	return getValue<int>("network/plugin_port", 6666);

src/lib/settings/ApplicationSettings.h

@@ -181,6 +181,9 @@ public:
 	FilePath getLastFilepickerLocation() const;
 	void setLastFilepickerLocation(const FilePath& path);
 
+	float getGraphZoomLevel() const;
+	void setGraphZoomLevel(float zoomLevel);
+
 	// network
 	int getPluginPort() const;
 	void setPluginPort(const int pluginPort);