Refactor Process Mode

Implements https://github.com/godotengine/godot-proposals/issues/1835#issuecomment-727186192

* PauseMode is now ProcessMode, containing the following states:
	```
	PROCESS_MODE_INHERIT, // same as parent node
	PROCESS_MODE_NORMAL, // process only if not paused
	PROCESS_MODE_PAUSE_ONLY, // process only if paused
	PROCESS_MODE_ALWAYS, // process always
	PROCESS_MODE_DISABLED, // never process
	```
* NOTIFICATION_PAUSED and NOTIFICATION_UNPAUSED are received effectively when the node is paused and unpaused (not any longer when pause mode is set in SceneTree).
* Renamed some nodes that used ProcessMode/process_mode to specify a callback type to ProcessCallback to avoid clashes.

5 files changed, 16 insertions, 2 deletions

diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index 60071f6263..74b874b54e 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -1761,6 +1761,10 @@ void EditorInspector::update_tree() {
 			continue;
 		}
 
+		if (p.name == "script") {
+			category_vbox = nullptr; // script should go into its own category
+		}
+
 		if (p.usage & PROPERTY_USAGE_HIGH_END_GFX && RS::get_singleton()->is_low_end()) {
 			continue; //do not show this property in low end gfx
 		}
diff --git a/editor/plugins/gpu_particles_2d_editor_plugin.cpp b/editor/plugins/gpu_particles_2d_editor_plugin.cpp
index 1aaa98d02e..b447304a3f 100644
--- a/editor/plugins/gpu_particles_2d_editor_plugin.cpp
+++ b/editor/plugins/gpu_particles_2d_editor_plugin.cpp
@@ -81,7 +81,7 @@ void GPUParticles2DEditorPlugin::_menu_callback(int p_idx) {
 			cpu_particles->set_name(particles->get_name());
 			cpu_particles->set_transform(particles->get_transform());
 			cpu_particles->set_visible(particles->is_visible());
-			cpu_particles->set_pause_mode(particles->get_pause_mode());
+			cpu_particles->set_process_mode(particles->get_process_mode());
 			cpu_particles->set_z_index(particles->get_z_index());
 
 			UndoRedo *ur = EditorNode::get_singleton()->get_undo_redo();
diff --git a/editor/plugins/gpu_particles_3d_editor_plugin.cpp b/editor/plugins/gpu_particles_3d_editor_plugin.cpp
index 5b840ddbcf..433a5ae51c 100644
--- a/editor/plugins/gpu_particles_3d_editor_plugin.cpp
+++ b/editor/plugins/gpu_particles_3d_editor_plugin.cpp
@@ -263,7 +263,7 @@ void GPUParticles3DEditor::_menu_option(int p_option) {
 			cpu_particles->set_name(node->get_name());
 			cpu_particles->set_transform(node->get_transform());
 			cpu_particles->set_visible(node->is_visible());
-			cpu_particles->set_pause_mode(node->get_pause_mode());
+			cpu_particles->set_process_mode(node->get_process_mode());
 
 			UndoRedo *ur = EditorNode::get_singleton()->get_undo_redo();
 			ur->create_action(TTR("Convert to CPUParticles3D"));
diff --git a/editor/scene_tree_editor.cpp b/editor/scene_tree_editor.cpp
index b9a3e2a801..d165cf8171 100644
--- a/editor/scene_tree_editor.cpp
+++ b/editor/scene_tree_editor.cpp
@@ -236,6 +236,8 @@ bool SceneTreeEditor::_add_nodes(Node *p_node, TreeItem *p_parent, bool p_scroll
 		item->set_text(0, node_name);
 		item->set_selectable(0, marked_selectable);
 		item->set_custom_color(0, get_theme_color("accent_color", "Editor"));
+	} else if (!p_node->can_process()) {
+		item->set_custom_color(0, get_theme_color("disabled_font_color", "Editor"));
 	} else if (!marked_selectable && !marked_children_selectable) {
 		Node *node = p_node;
 		while (node) {
@@ -585,6 +587,11 @@ void SceneTreeEditor::_test_update_tree() {
 	tree_dirty = true;
 }
 
+void SceneTreeEditor::_tree_process_mode_changed() {
+	MessageQueue::get_singleton()->push_call(this, "_update_tree");
+	tree_dirty = true;
+}
+
 void SceneTreeEditor::_tree_changed() {
 	if (EditorNode::get_singleton()->is_exiting()) {
 		return; //speed up exit
@@ -655,6 +662,7 @@ void SceneTreeEditor::_notification(int p_what) {
 	switch (p_what) {
 		case NOTIFICATION_ENTER_TREE: {
 			get_tree()->connect("tree_changed", callable_mp(this, &SceneTreeEditor::_tree_changed));
+			get_tree()->connect("tree_process_mode_changed", callable_mp(this, &SceneTreeEditor::_tree_process_mode_changed));
 			get_tree()->connect("node_removed", callable_mp(this, &SceneTreeEditor::_node_removed));
 			get_tree()->connect("node_renamed", callable_mp(this, &SceneTreeEditor::_node_renamed));
 			get_tree()->connect("node_configuration_warning_changed", callable_mp(this, &SceneTreeEditor::_warning_changed));
@@ -665,6 +673,7 @@ void SceneTreeEditor::_notification(int p_what) {
 		} break;
 		case NOTIFICATION_EXIT_TREE: {
 			get_tree()->disconnect("tree_changed", callable_mp(this, &SceneTreeEditor::_tree_changed));
+			get_tree()->disconnect("tree_process_mode_changed", callable_mp(this, &SceneTreeEditor::_tree_process_mode_changed));
 			get_tree()->disconnect("node_removed", callable_mp(this, &SceneTreeEditor::_node_removed));
 			get_tree()->disconnect("node_renamed", callable_mp(this, &SceneTreeEditor::_node_renamed));
 			tree->disconnect("item_collapsed", callable_mp(this, &SceneTreeEditor::_cell_collapsed));
diff --git a/editor/scene_tree_editor.h b/editor/scene_tree_editor.h
index 7d3419516d..6b505a6784 100644
--- a/editor/scene_tree_editor.h
+++ b/editor/scene_tree_editor.h
@@ -75,6 +75,7 @@ class SceneTreeEditor : public Control {
 	void _test_update_tree();
 	void _update_tree(bool p_scroll_to_selected = false);
 	void _tree_changed();
+	void _tree_process_mode_changed();
 	void _node_removed(Node *p_node);
 	void _node_renamed(Node *p_node);