Added code preview to visual shader

2 files changed, 5 insertions, 0 deletions

diff --git a/scene/resources/visual_shader.cpp b/scene/resources/visual_shader.cpp
index 389011c095..f6424b1920 100644
--- a/scene/resources/visual_shader.cpp
+++ b/scene/resources/visual_shader.cpp
@@ -1249,6 +1249,10 @@ void VisualShader::_update_shader() const {
 	for (int i = 0; i < default_tex_params.size(); i++) {
 		const_cast<VisualShader *>(this)->set_default_texture_param(default_tex_params[i].name, default_tex_params[i].param);
 	}
+	if (previous_code != final_code) {
+		const_cast<VisualShader *>(this)->emit_signal("changed");
+	}
+	previous_code = final_code;
 }
 
 void VisualShader::_queue_update() {
diff --git a/scene/resources/visual_shader.h b/scene/resources/visual_shader.h
index a89e3295fc..951bd6f668 100644
--- a/scene/resources/visual_shader.h
+++ b/scene/resources/visual_shader.h
@@ -73,6 +73,7 @@ private:
 	} graph[TYPE_MAX];
 
 	Shader::Mode shader_mode;
+	mutable String previous_code;
 
 	Array _get_node_connections(Type p_type) const;