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

4 files changed, 10 insertions, 3 deletions

diff --git a/scene/2d/sprite.cpp b/scene/2d/sprite.cpp
index 450f8e2474..c4590c100d 100644
--- a/scene/2d/sprite.cpp
+++ b/scene/2d/sprite.cpp
@@ -122,6 +122,7 @@ void Sprite::set_texture(const Ref<Texture> &p_texture) {
 	update();
 	emit_signal("texture_changed");
 	item_rect_changed();
+	_change_notify("texture");
 }
 
 void Sprite::set_normal_map(const Ref<Texture> &p_texture) {
diff --git a/scene/gui/patch_9_rect.cpp b/scene/gui/patch_9_rect.cpp
index 735f36b55d..249090830d 100644
--- a/scene/gui/patch_9_rect.cpp
+++ b/scene/gui/patch_9_rect.cpp
@@ -99,6 +99,7 @@ void NinePatchRect::set_texture(const Ref<Texture> &p_tex) {
 	*/
 	minimum_size_changed();
 	emit_signal("texture_changed");
+	_change_notify("texture");
 }
 
 Ref<Texture> NinePatchRect::get_texture() const {
diff --git a/scene/resources/style_box.cpp b/scene/resources/style_box.cpp
index 2714ffec10..c67f40782d 100644
--- a/scene/resources/style_box.cpp
+++ b/scene/resources/style_box.cpp
@@ -107,6 +107,7 @@ void StyleBoxTexture::set_texture(RES p_texture) {
 	region_rect = Rect2(Point2(), texture->get_size());
 	emit_signal("texture_changed");
 	emit_changed();
+	_change_notify("texture");
 }
 
 RES StyleBoxTexture::get_texture() const {
diff --git a/scene/resources/texture.cpp b/scene/resources/texture.cpp
index 171826cb2f..f6856b3539 100644
--- a/scene/resources/texture.cpp
+++ b/scene/resources/texture.cpp
@@ -830,7 +830,7 @@ void AtlasTexture::set_atlas(const Ref<Texture> &p_atlas) {
 		return;
 	atlas = p_atlas;
 	emit_changed();
-	emit_signal("atlas_changed");
+	_change_notify("atlas");
 }
 Ref<Texture> AtlasTexture::get_atlas() const {
 
@@ -839,8 +839,11 @@ Ref<Texture> AtlasTexture::get_atlas() const {
 
 void AtlasTexture::set_region(const Rect2 &p_region) {
 
+	if (region == p_region)
+		return;
 	region = p_region;
 	emit_changed();
+	_change_notify("region");
 }
 
 Rect2 AtlasTexture::get_region() const {
@@ -850,8 +853,11 @@ Rect2 AtlasTexture::get_region() const {
 
 void AtlasTexture::set_margin(const Rect2 &p_margin) {
 
+	if (margin == p_margin)
+		return;
 	margin = p_margin;
 	emit_changed();
+	_change_notify("margin");
 }
 
 Rect2 AtlasTexture::get_margin() const {
@@ -870,8 +876,6 @@ void AtlasTexture::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_margin", "margin"), &AtlasTexture::set_margin);
 	ClassDB::bind_method(D_METHOD("get_margin"), &AtlasTexture::get_margin);
 
-	ADD_SIGNAL(MethodInfo("atlas_changed"));
-
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "atlas", PROPERTY_HINT_RESOURCE_TYPE, "Texture"), "set_atlas", "get_atlas");
 	ADD_PROPERTY(PropertyInfo(Variant::RECT2, "region"), "set_region", "get_region");
 	ADD_PROPERTY(PropertyInfo(Variant::RECT2, "margin"), "set_margin", "get_margin");