Texture region now updates when changing an Atlas

- Removed atlas_changed signal for AtlasTexture
- Changes are now handled by _notify_change
- Removed unneccesary signal connections
- Texture preview now updates in real-time

Fixed TextureRegionEditor constantly regenerating

3 files changed, 27 insertions, 28 deletions

diff --git a/editor/plugins/texture_editor_plugin.cpp b/editor/plugins/texture_editor_plugin.cpp
index c4fe15e61c..df71ea99c6 100644
--- a/editor/plugins/texture_editor_plugin.cpp
+++ b/editor/plugins/texture_editor_plugin.cpp
@@ -102,14 +102,24 @@ void TextureEditor::_notification(int p_what) {
 	}
 }
 
+void TextureEditor::_changed_callback(Object *p_changed, const char *p_prop) {
+
+	if (!is_visible())
+		return;
+	update();
+}
+
 void TextureEditor::edit(Ref<Texture> p_texture) {
 
+	if (!texture.is_null())
+		texture->remove_change_receptor(this);
+
 	texture = p_texture;
 
-	if (!texture.is_null())
+	if (!texture.is_null()) {
+		texture->add_change_receptor(this);
 		update();
-	else {
-
+	} else {
 		hide();
 	}
 }
diff --git a/editor/plugins/texture_editor_plugin.h b/editor/plugins/texture_editor_plugin.h
index 9382983538..13f8dd7fbd 100644
--- a/editor/plugins/texture_editor_plugin.h
+++ b/editor/plugins/texture_editor_plugin.h
@@ -43,6 +43,7 @@ class TextureEditor : public Control {
 protected:
 	void _notification(int p_what);
 	void _gui_input(Ref<InputEvent> p_event);
+	void _changed_callback(Object *p_changed, const char *p_prop);
 	static void _bind_methods();
 
 public:
diff --git a/editor/plugins/texture_region_editor_plugin.cpp b/editor/plugins/texture_region_editor_plugin.cpp
index 8a7dcea393..4cd18b090a 100644
--- a/editor/plugins/texture_region_editor_plugin.cpp
+++ b/editor/plugins/texture_region_editor_plugin.cpp
@@ -617,38 +617,24 @@ void TextureRegionEditor::_bind_methods() {
 }
 
 void TextureRegionEditor::edit(Object *p_obj) {
-	if (node_sprite && node_sprite->is_connected("texture_changed", this, "_edit_region"))
-		node_sprite->disconnect("texture_changed", this, "_edit_region");
-	if (node_patch9 && node_patch9->is_connected("texture_changed", this, "_edit_region"))
-		node_patch9->disconnect("texture_changed", this, "_edit_region");
-	if (obj_styleBox.is_valid() && obj_styleBox->is_connected("texture_changed", this, "_edit_region"))
-		obj_styleBox->disconnect("texture_changed", this, "_edit_region");
-	if (atlas_tex.is_valid() && atlas_tex->is_connected("atlas_changed", this, "_edit_region"))
-		atlas_tex->disconnect("atlas_changed", this, "_edit_region");
+	if (node_sprite)
+		node_sprite->remove_change_receptor(this);
+	if (node_patch9)
+		node_patch9->remove_change_receptor(this);
+	if (obj_styleBox.is_valid())
+		obj_styleBox->remove_change_receptor(this);
+	if (atlas_tex.is_valid())
+		atlas_tex->remove_change_receptor(this);
 	if (p_obj) {
 		node_sprite = p_obj->cast_to<Sprite>();
 		node_patch9 = p_obj->cast_to<NinePatchRect>();
 		if (p_obj->cast_to<StyleBoxTexture>())
 			obj_styleBox = Ref<StyleBoxTexture>(p_obj->cast_to<StyleBoxTexture>());
-		if (p_obj->cast_to<AtlasTexture>()) {
+		if (p_obj->cast_to<AtlasTexture>())
 			atlas_tex = Ref<AtlasTexture>(p_obj->cast_to<AtlasTexture>());
-			atlas_tex->connect("atlas_changed", this, "_edit_region");
-		} else {
-			p_obj->connect("texture_changed", this, "_edit_region");
-		}
 		p_obj->add_change_receptor(this);
-		p_obj->connect("tree_exited", this, "_node_removed", varray(p_obj), CONNECT_ONESHOT);
 		_edit_region();
 	} else {
-		if (node_sprite)
-			node_sprite->disconnect("tree_exited", this, "_node_removed");
-		else if (node_patch9)
-			node_patch9->disconnect("tree_exited", this, "_node_removed");
-		else if (obj_styleBox.is_valid())
-			obj_styleBox->disconnect("tree_exited", this, "_node_removed");
-		else if (atlas_tex.is_valid())
-			atlas_tex->disconnect("tree_exited", this, "_node_removed");
-
 		node_sprite = NULL;
 		node_patch9 = NULL;
 		obj_styleBox = Ref<StyleBoxTexture>(NULL);
@@ -658,9 +644,11 @@ void TextureRegionEditor::edit(Object *p_obj) {
 }
 
 void TextureRegionEditor::_changed_callback(Object *p_changed, const char *p_prop) {
-	if ((String)p_prop == "region_rect") {
+
+	if (!is_visible())
+		return;
+	if (p_prop == StringName("atlas") || p_prop == StringName("texture"))
 		_edit_region();
-	}
 }
 
 void TextureRegionEditor::_edit_region() {