Add `Auto width` behavior to ItemList

Co-authored-by: Craig Hupin <[email protected]>

doc/classes/ItemList.xml

@@ -379,6 +379,9 @@
 		<member name="auto_height" type="bool" setter="set_auto_height" getter="has_auto_height" default="false">
 			If [code]true[/code], the control will automatically resize the height to fit its content.
 		</member>
+		<member name="auto_width" type="bool" setter="set_auto_width" getter="has_auto_width" default="false">
+			If [code]true[/code], the control will automatically resize the width to fit its content.
+		</member>
 		<member name="clip_contents" type="bool" setter="set_clip_contents" getter="is_clipping_contents" overrides="Control" default="true" />
 		<member name="fixed_column_width" type="int" setter="set_fixed_column_width" getter="get_fixed_column_width" default="0">
 			The width all columns will be adjusted to.

scene/gui/item_list.cpp

@@ -1446,12 +1446,13 @@ void ItemList::force_update_list_size() {
 		bool all_fit = true;
 		Vector2 ofs;
 		int col = 0;
+		int max_w = 0;
 		int max_h = 0;
 
 		separators.clear();
 
 		for (int i = 0; i < items.size(); i++) {
-			if (current_columns > 1 && items[i].rect_cache.size.width + ofs.x > fit_size) {
+			if (current_columns > 1 && items[i].rect_cache.size.width + ofs.x > fit_size && !auto_width) {
 				// Went past.
 				current_columns = MAX(col, 1);
 				all_fit = false;
@@ -1477,6 +1478,7 @@ void ItemList::force_update_list_size() {
 					items.write[j].rect_cache.size.y = max_h;
 				}
 
+				max_w = MAX(max_w, ofs.x);
 				ofs.x = 0;
 				ofs.y += max_h;
 				col = 0;
@@ -1498,12 +1500,16 @@ void ItemList::force_update_list_size() {
 			if (auto_height) {
 				auto_height_value = ofs.y + max_h + theme_cache.panel_style->get_minimum_size().height;
 			}
+			if (auto_width) {
+				auto_width_value = max_w + theme_cache.panel_style->get_minimum_size().width;
+			}
 			scroll_bar->set_max(max);
 			scroll_bar->set_page(page);
 			if (max <= page) {
 				scroll_bar->set_value(0);
 				scroll_bar->hide();
 			} else {
+				auto_width_value += scroll_bar_minwidth;
 				scroll_bar->show();
 
 				if (do_autoscroll_to_bottom) {
@@ -1704,16 +1710,35 @@ bool ItemList::is_anything_selected() {
 }
 
 Size2 ItemList::get_minimum_size() const {
+	Size2 min_size;
+	if (auto_width) {
+		min_size.x = auto_width_value;
+	}
+
 	if (auto_height) {
-		return Size2(0, auto_height_value);
+		min_size.y = auto_height_value;
 	}
-	return Size2();
+	return min_size;
 }
 
 void ItemList::set_autoscroll_to_bottom(const bool p_enable) {
 	do_autoscroll_to_bottom = p_enable;
 }
 
+void ItemList::set_auto_width(bool p_enable) {
+	if (auto_width == p_enable) {
+		return;
+	}
+
+	auto_width = p_enable;
+	shape_changed = true;
+	queue_redraw();
+}
+
+bool ItemList::has_auto_width() const {
+	return auto_width;
+}
+
 void ItemList::set_auto_height(bool p_enable) {
 	if (auto_height == p_enable) {
 		return;
@@ -1869,6 +1894,9 @@ void ItemList::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_allow_search", "allow"), &ItemList::set_allow_search);
 	ClassDB::bind_method(D_METHOD("get_allow_search"), &ItemList::get_allow_search);
 
+	ClassDB::bind_method(D_METHOD("set_auto_width", "enable"), &ItemList::set_auto_width);
+	ClassDB::bind_method(D_METHOD("has_auto_width"), &ItemList::has_auto_width);
+
 	ClassDB::bind_method(D_METHOD("set_auto_height", "enable"), &ItemList::set_auto_height);
 	ClassDB::bind_method(D_METHOD("has_auto_height"), &ItemList::has_auto_height);
 
@@ -1890,6 +1918,7 @@ void ItemList::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_rmb_select"), "set_allow_rmb_select", "get_allow_rmb_select");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "allow_search"), "set_allow_search", "get_allow_search");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "max_text_lines", PROPERTY_HINT_RANGE, "1,10,1,or_greater"), "set_max_text_lines", "get_max_text_lines");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "auto_width"), "set_auto_width", "has_auto_width");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "auto_height"), "set_auto_height", "has_auto_height");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "text_overrun_behavior", PROPERTY_HINT_ENUM, "Trim Nothing,Trim Characters,Trim Words,Ellipsis,Word Ellipsis"), "set_text_overrun_behavior", "get_text_overrun_behavior");
 	ADD_ARRAY_COUNT("Items", "item_count", "set_item_count", "get_item_count", "item_");

scene/gui/item_list.h

@@ -100,6 +100,9 @@ private:
 	bool same_column_width = false;
 	bool allow_search = true;
 
+	bool auto_width = false;
+	float auto_width_value = 0.0;
+
 	bool auto_height = false;
 	float auto_height_value = 0.0;
 
@@ -291,6 +294,9 @@ public:
 	void set_icon_scale(real_t p_scale);
 	real_t get_icon_scale() const;
 
+	void set_auto_width(bool p_enable);
+	bool has_auto_width() const;
+
 	void set_auto_height(bool p_enable);
 	bool has_auto_height() const;