Add copy/paste options to preview material parameters in visual shader

editor/plugins/visual_shader_editor_plugin.cpp

@@ -1985,6 +1985,67 @@ bool VisualShaderEditor::_update_preview_parameter_tree() {
 	return found;
 }
 
+void VisualShaderEditor::_preview_tools_menu_option(int p_idx) {
+	ShaderMaterial *src_mat = nullptr;
+
+	if (p_idx == COPY_PARAMS_FROM_MATERIAL || p_idx == PASTE_PARAMS_TO_MATERIAL) {
+		for (int i = EditorNode::get_singleton()->get_editor_selection_history()->get_path_size() - 1; i >= 0; i--) {
+			Object *object = ObjectDB::get_instance(EditorNode::get_singleton()->get_editor_selection_history()->get_path_object(i));
+			ShaderMaterial *src_mat2;
+			if (!object) {
+				continue;
+			}
+			if (object->has_method("get_material_override")) { // Trying to get material from MeshInstance.
+				src_mat2 = Object::cast_to<ShaderMaterial>(object->call("get_material_override"));
+			} else if (object->has_method("get_material")) { // From CanvasItem/Node2D.
+				src_mat2 = Object::cast_to<ShaderMaterial>(object->call("get_material"));
+			} else {
+				src_mat2 = Object::cast_to<ShaderMaterial>(object);
+			}
+
+			if (src_mat2 && src_mat2->get_shader().is_valid() && src_mat2->get_shader() == visual_shader) {
+				src_mat = src_mat2;
+				break;
+			}
+		}
+	}
+
+	switch (p_idx) {
+		case COPY_PARAMS_FROM_MATERIAL:
+			if (src_mat) {
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
+				undo_redo->create_action(TTR("Copy Preview Shader Parameters From Material"));
+
+				List<PropertyInfo> params;
+				preview_material->get_shader()->get_shader_uniform_list(&params);
+				for (const PropertyInfo &E : params) {
+					undo_redo->add_do_method(visual_shader.ptr(), "_set_preview_shader_parameter", E.name, src_mat->get_shader_parameter(E.name));
+					undo_redo->add_undo_method(visual_shader.ptr(), "_set_preview_shader_parameter", E.name, preview_material->get_shader_parameter(E.name));
+				}
+
+				undo_redo->commit_action();
+			}
+			break;
+		case PASTE_PARAMS_TO_MATERIAL:
+			if (src_mat) {
+				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
+				undo_redo->create_action(TTR("Paste Preview Shader Parameters To Material"));
+
+				List<PropertyInfo> params;
+				preview_material->get_shader()->get_shader_uniform_list(&params);
+				for (const PropertyInfo &E : params) {
+					undo_redo->add_do_method(src_mat, "set_shader_parameter", E.name, preview_material->get_shader_parameter(E.name));
+					undo_redo->add_undo_method(src_mat, "set_shader_parameter", E.name, src_mat->get_shader_parameter(E.name));
+				}
+
+				undo_redo->commit_action();
+			}
+			break;
+		default:
+			break;
+	}
+}
+
 void VisualShaderEditor::_clear_preview_param() {
 	selected_param_id = "";
 	current_prop = nullptr;
@@ -5159,6 +5220,7 @@ void VisualShaderEditor::_notification(int p_what) {
 			}
 
 			tools->set_button_icon(get_editor_theme_icon(SNAME("Tools")));
+			preview_tools->set_button_icon(get_editor_theme_icon(SNAME("Tools")));
 
 			if (is_visible_in_tree()) {
 				_update_graph();
@@ -6555,11 +6617,21 @@ VisualShaderEditor::VisualShaderEditor() {
 	VBoxContainer *params_vbox = memnew(VBoxContainer);
 	preview_split->add_child(params_vbox);
 
+	HBoxContainer *filter_hbox = memnew(HBoxContainer);
+	params_vbox->add_child(filter_hbox);
+
 	param_filter = memnew(LineEdit);
+	filter_hbox->add_child(param_filter);
 	param_filter->connect(SceneStringName(text_changed), callable_mp(this, &VisualShaderEditor::_param_filter_changed));
 	param_filter->set_h_size_flags(SIZE_EXPAND_FILL);
 	param_filter->set_placeholder(TTR("Filter Parameters"));
-	params_vbox->add_child(param_filter);
+
+	preview_tools = memnew(MenuButton);
+	filter_hbox->add_child(preview_tools);
+	preview_tools->set_tooltip_text(TTR("Options"));
+	preview_tools->get_popup()->connect(SceneStringName(id_pressed), callable_mp(this, &VisualShaderEditor::_preview_tools_menu_option));
+	preview_tools->get_popup()->add_item(TTR("Copy Parameters From Material"), COPY_PARAMS_FROM_MATERIAL);
+	preview_tools->get_popup()->add_item(TTR("Paste Parameters To Material"), PASTE_PARAMS_TO_MATERIAL);
 
 	ScrollContainer *sc = memnew(ScrollContainer);
 	sc->set_v_size_flags(SIZE_EXPAND_FILL);

editor/plugins/visual_shader_editor_plugin.h

@@ -276,6 +276,7 @@ class VisualShaderEditor : public ShaderEditor {
 	bool shader_preview_showed = true;
 
 	LineEdit *param_filter = nullptr;
+	MenuButton *preview_tools = nullptr;
 	String selected_param_id;
 	Tree *parameters = nullptr;
 	HashMap<String, PropertyInfo> parameter_props;
@@ -318,6 +319,11 @@ class VisualShaderEditor : public ShaderEditor {
 		COLLAPSE_ALL
 	};
 
+	enum PreviewToolsMenuOptions {
+		COPY_PARAMS_FROM_MATERIAL,
+		PASTE_PARAMS_TO_MATERIAL,
+	};
+
 #ifdef MINGW_ENABLED
 #undef DELETE
 #endif
@@ -367,6 +373,7 @@ class VisualShaderEditor : public ShaderEditor {
 	void _show_add_varying_dialog();
 	void _show_remove_varying_dialog();
 
+	void _preview_tools_menu_option(int p_idx);
 	void _clear_preview_param();
 	void _update_preview_parameter_list();
 	bool _update_preview_parameter_tree();