TextureProgressBar Update upon texture changes

(cherry picked from commit cdc63214fe58880654e26fd0e2d016c2a927a151)

2 files changed, 28 insertions, 23 deletions

diff --git a/scene/gui/texture_progress_bar.cpp b/scene/gui/texture_progress_bar.cpp
index 2526ee8215..2464e005ee 100644
--- a/scene/gui/texture_progress_bar.cpp
+++ b/scene/gui/texture_progress_bar.cpp
@@ -31,15 +31,10 @@
 #include "texture_progress_bar.h"
 
 #include "core/config/engine.h"
+#include "core/core_string_names.h"
 
 void TextureProgressBar::set_under_texture(const Ref<Texture2D> &p_texture) {
-	if (under == p_texture) {
-		return;
-	}
-
-	under = p_texture;
-	queue_redraw();
-	update_minimum_size();
+	_set_texture(&under, p_texture);
 }
 
 Ref<Texture2D> TextureProgressBar::get_under_texture() const {
@@ -47,15 +42,7 @@ Ref<Texture2D> TextureProgressBar::get_under_texture() const {
 }
 
 void TextureProgressBar::set_over_texture(const Ref<Texture2D> &p_texture) {
-	if (over == p_texture) {
-		return;
-	}
-
-	over = p_texture;
-	queue_redraw();
-	if (under.is_null()) {
-		update_minimum_size();
-	}
+	_set_texture(&over, p_texture);
 }
 
 Ref<Texture2D> TextureProgressBar::get_over_texture() const {
@@ -108,13 +95,7 @@ Size2 TextureProgressBar::get_minimum_size() const {
 }
 
 void TextureProgressBar::set_progress_texture(const Ref<Texture2D> &p_texture) {
-	if (progress == p_texture) {
-		return;
-	}
-
-	progress = p_texture;
-	queue_redraw();
-	update_minimum_size();
+	_set_texture(&progress, p_texture);
 }
 
 Ref<Texture2D> TextureProgressBar::get_progress_texture() const {
@@ -173,6 +154,28 @@ Color TextureProgressBar::get_tint_over() const {
 	return tint_over;
 }
 
+void TextureProgressBar::_set_texture(Ref<Texture2D> *p_destination, const Ref<Texture2D> &p_texture) {
+	DEV_ASSERT(p_destination);
+	Ref<Texture2D> &destination = *p_destination;
+	if (destination == p_texture) {
+		return;
+	}
+	if (destination.is_valid()) {
+		destination->disconnect(CoreStringNames::get_singleton()->changed, callable_mp(this, &TextureProgressBar::_texture_changed));
+	}
+	destination = p_texture;
+	if (destination.is_valid()) {
+		// Pass `CONNECT_REFERENCE_COUNTED` to avoid early disconnect in case the same texture is assigned to different "slots".
+		destination->connect(CoreStringNames::get_singleton()->changed, callable_mp(this, &TextureProgressBar::_texture_changed), CONNECT_REFERENCE_COUNTED);
+	}
+	_texture_changed();
+}
+
+void TextureProgressBar::_texture_changed() {
+	update_minimum_size();
+	queue_redraw();
+}
+
 Point2 TextureProgressBar::unit_val_to_uv(float val) {
 	if (progress.is_null()) {
 		return Point2();
diff --git a/scene/gui/texture_progress_bar.h b/scene/gui/texture_progress_bar.h
index 53ec6fa2ae..5999aa986b 100644
--- a/scene/gui/texture_progress_bar.h
+++ b/scene/gui/texture_progress_bar.h
@@ -113,6 +113,8 @@ private:
 	Color tint_progress = Color(1, 1, 1);
 	Color tint_over = Color(1, 1, 1);
 
+	void _set_texture(Ref<Texture2D> *p_destination, const Ref<Texture2D> &p_texture);
+	void _texture_changed();
 	Point2 unit_val_to_uv(float val);
 	Point2 get_relative_center();
 	void draw_nine_patch_stretched(const Ref<Texture2D> &p_texture, FillMode p_mode, double p_ratio, const Color &p_modulate);