From b9e1e9b2f33ed09219b1b0f0bf3729f0f99d6d68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20=C5=A0pirk?= <mspirk@elektroline.cz>
Date: Tue, 29 Oct 2024 09:56:06 +0100
Subject: [PATCH] draw graph into SVG

---
 libshvvisu/include/shv/visu/timeline/graph.h |  4 ++++
 libshvvisu/src/timeline/graph.cpp            | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/libshvvisu/include/shv/visu/timeline/graph.h b/libshvvisu/include/shv/visu/timeline/graph.h
index 05176ba2c..0bdbfb82b 100644
--- a/libshvvisu/include/shv/visu/timeline/graph.h
+++ b/libshvvisu/include/shv/visu/timeline/graph.h
@@ -23,6 +23,8 @@
 #include <QTimeZone>
 #endif
 
+class QSvgGenerator;
+
 namespace shv::visu::timeline {
 
 class SHVVISU_DECL_EXPORT Graph : public QObject
@@ -236,6 +238,8 @@ class SHVVISU_DECL_EXPORT Graph : public QObject
 	void loadVisualSettings(const QString &settings_id, const QString &name);
 	QString loadedVisualSettingsId();
 
+	void draw(QSvgGenerator *svg_generator, const QRect &rect);
+
 protected:
 	void sanityXRangeZoom();
 
diff --git a/libshvvisu/src/timeline/graph.cpp b/libshvvisu/src/timeline/graph.cpp
index 2d07a1a87..933facb73 100644
--- a/libshvvisu/src/timeline/graph.cpp
+++ b/libshvvisu/src/timeline/graph.cpp
@@ -5,6 +5,7 @@
 #include <shv/core/exception.h>
 #include <shv/coreqt/log.h>
 #include <shv/chainpack/rpcvalue.h>
+#include <QtSvg/QSvgGenerator>
 
 #include <QPainter>
 #include <QFontMetrics>
@@ -1296,6 +1297,15 @@ int Graph::maximizedChannelIndex() const
 	return -1;
 }
 
+void Graph::draw(QSvgGenerator *svg_generator, const QRect &rect)
+{
+	auto orig_layout = m_layout.rect;
+	makeLayout(rect);
+	QPainter painter(svg_generator);
+	draw(&painter, rect, rect);
+	makeLayout(orig_layout);
+}
+
 void Graph::draw(QPainter *painter, const QRect &dirty_rect, const QRect &view_rect)
 {
 	drawBackground(painter, dirty_rect);