1 files changed, 42 insertions, 15 deletions

diff --git a/scene/gui/tab_container.cpp b/scene/gui/tab_container.cpp
index d38af68935..01c1a15b79 100644
--- a/scene/gui/tab_container.cpp
+++ b/scene/gui/tab_container.cpp
@@ -415,40 +415,49 @@ void TabContainer::_notification(int p_what) {
 					break;
 			}
 
+			if (all_tabs_in_front) {
+				// Draw the tab area.
+				panel->draw(canvas, Rect2(0, header_height, size.width, size.height - header_height));
+			}
+
 			// Draw unselected tabs in back
 			int x = 0;
 			int x_current = 0;
+			int index = 0;
 			for (int i = 0; i < tab_widths.size(); i++) {
-				if (get_tab_hidden(i)) {
+				index = i + first_tab_cache;
+				if (get_tab_hidden(index)) {
 					continue;
 				}
 
 				int tab_width = tab_widths[i];
-				if (get_tab_disabled(i + first_tab_cache)) {
+				if (get_tab_disabled(index)) {
 					if (rtl) {
-						_draw_tab(tab_disabled, font_color_disabled, i, size.width - (tabs_ofs_cache + x) - tab_width);
+						_draw_tab(tab_disabled, font_color_disabled, index, size.width - (tabs_ofs_cache + x) - tab_width);
 					} else {
-						_draw_tab(tab_disabled, font_color_disabled, i, tabs_ofs_cache + x);
+						_draw_tab(tab_disabled, font_color_disabled, index, tabs_ofs_cache + x);
 					}
-				} else if (i + first_tab_cache == current) {
+				} else if (index == current) {
 					x_current = x;
 				} else {
 					if (rtl) {
-						_draw_tab(tab_bg, font_color_bg, i, size.width - (tabs_ofs_cache + x) - tab_width);
+						_draw_tab(tab_bg, font_color_bg, index, size.width - (tabs_ofs_cache + x) - tab_width);
 					} else {
-						_draw_tab(tab_bg, font_color_bg, i, tabs_ofs_cache + x);
+						_draw_tab(tab_bg, font_color_bg, index, tabs_ofs_cache + x);
 					}
 				}
 
 				x += tab_width;
-				last_tab_cache = i + first_tab_cache;
+				last_tab_cache = index;
 			}
 
-			// Draw the tab area.
-			panel->draw(canvas, Rect2(0, header_height, size.width, size.height - header_height));
+			if (!all_tabs_in_front) {
+				// Draw the tab area.
+				panel->draw(canvas, Rect2(0, header_height, size.width, size.height - header_height));
+			}
 
-			// Draw selected tab in front
-			if (tabs.size() > 0) {
+			// Draw selected tab in front. only draw selected tab when it's in visible range.
+			if (tabs.size() > 0 && current - first_tab_cache < tab_widths.size() && current >= first_tab_cache) {
 				if (rtl) {
 					_draw_tab(tab_fg, font_color_fg, current, size.width - (tabs_ofs_cache + x_current) - tab_widths[current]);
 				} else {
@@ -535,7 +544,7 @@ void TabContainer::_draw_tab(Ref<StyleBox> &p_tab_style, Color &p_font_color, in
 	p_tab_style->draw(canvas, tab_rect);
 
 	// Draw the tab contents.
-	Control *control = Object::cast_to<Control>(tabs[p_index + first_tab_cache]);
+	Control *control = Object::cast_to<Control>(tabs[p_index]);
 	String text = control->has_meta("_tab_name") ? String(tr(String(control->get_meta("_tab_name")))) : String(tr(control->get_name()));
 
 	int x_content = tab_rect.position.x + p_tab_style->get_margin(MARGIN_LEFT);
@@ -555,8 +564,8 @@ void TabContainer::_draw_tab(Ref<StyleBox> &p_tab_style, Color &p_font_color, in
 	}
 
 	// Draw the tab text.
-	Point2i text_pos(x_content, y_center - text_buf[p_index + first_tab_cache]->get_size().y / 2);
-	text_buf[p_index + first_tab_cache]->draw(canvas, text_pos, p_font_color);
+	Point2i text_pos(x_content, y_center - text_buf[p_index]->get_size().y / 2);
+	text_buf[p_index]->draw(canvas, text_pos, p_font_color);
 }
 
 void TabContainer::_on_theme_changed() {
@@ -1015,6 +1024,20 @@ bool TabContainer::are_tabs_visible() const {
 	return tabs_visible;
 }
 
+void TabContainer::set_all_tabs_in_front(bool p_in_front) {
+	if (p_in_front == all_tabs_in_front) {
+		return;
+	}
+
+	all_tabs_in_front = p_in_front;
+
+	update();
+}
+
+bool TabContainer::is_all_tabs_in_front() const {
+	return all_tabs_in_front;
+}
+
 Control *TabContainer::_get_tab(int p_idx) const {
 	return get_tab_control(p_idx);
 }
@@ -1206,6 +1229,8 @@ void TabContainer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_tab_align"), &TabContainer::get_tab_align);
 	ClassDB::bind_method(D_METHOD("set_tabs_visible", "visible"), &TabContainer::set_tabs_visible);
 	ClassDB::bind_method(D_METHOD("are_tabs_visible"), &TabContainer::are_tabs_visible);
+	ClassDB::bind_method(D_METHOD("set_all_tabs_in_front", "is_front"), &TabContainer::set_all_tabs_in_front);
+	ClassDB::bind_method(D_METHOD("is_all_tabs_in_front"), &TabContainer::is_all_tabs_in_front);
 	ClassDB::bind_method(D_METHOD("set_tab_title", "tab_idx", "title"), &TabContainer::set_tab_title);
 	ClassDB::bind_method(D_METHOD("get_tab_title", "tab_idx"), &TabContainer::get_tab_title);
 	ClassDB::bind_method(D_METHOD("set_tab_icon", "tab_idx", "icon"), &TabContainer::set_tab_icon);
@@ -1232,6 +1257,7 @@ void TabContainer::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "tab_align", PROPERTY_HINT_ENUM, "Left,Center,Right"), "set_tab_align", "get_tab_align");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "current_tab", PROPERTY_HINT_RANGE, "-1,4096,1", PROPERTY_USAGE_EDITOR), "set_current_tab", "get_current_tab");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "tabs_visible"), "set_tabs_visible", "are_tabs_visible");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "all_tabs_in_front"), "set_all_tabs_in_front", "is_all_tabs_in_front");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "drag_to_rearrange_enabled"), "set_drag_to_rearrange_enabled", "get_drag_to_rearrange_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_hidden_tabs_for_min_size"), "set_use_hidden_tabs_for_min_size", "get_use_hidden_tabs_for_min_size");
 
@@ -1251,6 +1277,7 @@ TabContainer::TabContainer() {
 	previous = 0;
 	align = ALIGN_CENTER;
 	tabs_visible = true;
+	all_tabs_in_front = false;
 	drag_to_rearrange_enabled = false;
 	tabs_rearrange_group = -1;
 	use_hidden_tabs_for_min_size = false;