Add tab tooltip text

doc/classes/TabBar.xml

@@ -111,6 +111,13 @@
 				Returns the title of the tab at index [param tab_idx].
 			</description>
 		</method>
+		<method name="get_tab_tooltip" qualifiers="const">
+			<return type="String" />
+			<param index="0" name="tab_idx" type="int" />
+			<description>
+				Returns the tooltip text of the tab at index [param tab_idx].
+			</description>
+		</method>
 		<method name="is_tab_disabled" qualifiers="const">
 			<return type="bool" />
 			<param index="0" name="tab_idx" type="int" />
@@ -224,6 +231,15 @@
 				Sets a [param title] for the tab at index [param tab_idx].
 			</description>
 		</method>
+		<method name="set_tab_tooltip">
+			<return type="void" />
+			<param index="0" name="tab_idx" type="int" />
+			<param index="1" name="tooltip" type="String" />
+			<description>
+				Sets a [param tooltip] for tab at index [param tab_idx].
+				[b]Note:[/b] By default, if the [param tooltip] is empty and the tab text is truncated (not all characters fit into the tab), the title will be displayed as a tooltip. To hide the tooltip, assign [code]" "[/code] as the [param tooltip] text.
+			</description>
+		</method>
 	</methods>
 	<members>
 		<member name="clip_tabs" type="bool" setter="set_clip_tabs" getter="get_clip_tabs" default="true">

doc/classes/TabContainer.xml

@@ -92,6 +92,13 @@
 				Returns the title of the tab at index [param tab_idx]. Tab titles default to the name of the indexed child node, but this can be overridden with [method set_tab_title].
 			</description>
 		</method>
+		<method name="get_tab_tooltip" qualifiers="const">
+			<return type="String" />
+			<param index="0" name="tab_idx" type="int" />
+			<description>
+				Returns the tooltip text of the tab at index [param tab_idx].
+			</description>
+		</method>
 		<method name="is_tab_disabled" qualifiers="const">
 			<return type="bool" />
 			<param index="0" name="tab_idx" type="int" />
@@ -173,6 +180,15 @@
 				Sets a custom title for the tab at index [param tab_idx] (tab titles default to the name of the indexed child node). Set it back to the child's name to make the tab default to it again.
 			</description>
 		</method>
+		<method name="set_tab_tooltip">
+			<return type="void" />
+			<param index="0" name="tab_idx" type="int" />
+			<param index="1" name="tooltip" type="String" />
+			<description>
+				Sets a custom tooltip text for tab at index [param tab_idx].
+				[b]Note:[/b] By default, if the [param tooltip] is empty and the tab text is truncated (not all characters fit into the tab), the title will be displayed as a tooltip. To hide the tooltip, assign [code]" "[/code] as the [param tooltip] text.
+			</description>
+		</method>
 	</methods>
 	<members>
 		<member name="all_tabs_in_front" type="bool" setter="set_all_tabs_in_front" getter="is_all_tabs_in_front" default="false">

scene/gui/tab_bar.cpp

@@ -323,6 +323,19 @@ void TabBar::gui_input(const Ref<InputEvent> &p_event) {
 	}
 }
 
+String TabBar::get_tooltip(const Point2 &p_pos) const {
+	int tab_idx = get_tab_idx_at_point(p_pos);
+	if (tab_idx < 0) {
+		return Control::get_tooltip(p_pos);
+	}
+
+	if (tabs[tab_idx].tooltip.is_empty() && tabs[tab_idx].truncated) {
+		return tabs[tab_idx].text;
+	}
+
+	return tabs[tab_idx].tooltip;
+}
+
 void TabBar::_shape(int p_tab) {
 	tabs.write[p_tab].text_buf->clear();
 	tabs.write[p_tab].text_buf->set_width(-1);
@@ -757,6 +770,16 @@ String TabBar::get_tab_title(int p_tab) const {
 	return tabs[p_tab].text;
 }
 
+void TabBar::set_tab_tooltip(int p_tab, const String &p_tooltip) {
+	ERR_FAIL_INDEX(p_tab, tabs.size());
+	tabs.write[p_tab].tooltip = p_tooltip;
+}
+
+String TabBar::get_tab_tooltip(int p_tab) const {
+	ERR_FAIL_INDEX_V(p_tab, tabs.size(), "");
+	return tabs[p_tab].tooltip;
+}
+
 void TabBar::set_tab_text_direction(int p_tab, Control::TextDirection p_text_direction) {
 	ERR_FAIL_INDEX(p_tab, tabs.size());
 	ERR_FAIL_COND((int)p_text_direction < -1 || (int)p_text_direction > 3);
@@ -998,7 +1021,8 @@ void TabBar::_update_cache(bool p_update_hover) {
 		tabs.write[i].size_text = Math::ceil(tabs[i].text_buf->get_size().x);
 		tabs.write[i].size_cache = get_tab_width(i);
 
-		if (max_width > 0 && tabs[i].size_cache > max_width) {
+		tabs.write[i].truncated = max_width > 0 && tabs[i].size_cache > max_width;
+		if (tabs[i].truncated) {
 			int size_textless = tabs[i].size_cache - tabs[i].size_text;
 			int mw = MAX(size_textless, max_width);
 
@@ -1730,6 +1754,8 @@ void TabBar::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("select_next_available"), &TabBar::select_next_available);
 	ClassDB::bind_method(D_METHOD("set_tab_title", "tab_idx", "title"), &TabBar::set_tab_title);
 	ClassDB::bind_method(D_METHOD("get_tab_title", "tab_idx"), &TabBar::get_tab_title);
+	ClassDB::bind_method(D_METHOD("set_tab_tooltip", "tab_idx", "tooltip"), &TabBar::set_tab_tooltip);
+	ClassDB::bind_method(D_METHOD("get_tab_tooltip", "tab_idx"), &TabBar::get_tab_tooltip);
 	ClassDB::bind_method(D_METHOD("set_tab_text_direction", "tab_idx", "direction"), &TabBar::set_tab_text_direction);
 	ClassDB::bind_method(D_METHOD("get_tab_text_direction", "tab_idx"), &TabBar::get_tab_text_direction);
 	ClassDB::bind_method(D_METHOD("set_tab_language", "tab_idx", "language"), &TabBar::set_tab_language);
@@ -1843,6 +1869,7 @@ void TabBar::_bind_methods() {
 
 	base_property_helper.set_prefix("tab_");
 	base_property_helper.register_property(PropertyInfo(Variant::STRING, "title"), defaults.text, &TabBar::set_tab_title, &TabBar::get_tab_title);
+	base_property_helper.register_property(PropertyInfo(Variant::STRING, "tooltip"), defaults.tooltip, &TabBar::set_tab_tooltip, &TabBar::get_tab_tooltip);
 	base_property_helper.register_property(PropertyInfo(Variant::OBJECT, "icon", PROPERTY_HINT_RESOURCE_TYPE, "Texture2D"), defaults.icon, &TabBar::set_tab_icon, &TabBar::get_tab_icon);
 	base_property_helper.register_property(PropertyInfo(Variant::BOOL, "disabled"), defaults.disabled, &TabBar::set_tab_disabled, &TabBar::is_tab_disabled);
 }

scene/gui/tab_bar.h

@@ -56,6 +56,7 @@ public:
 private:
 	struct Tab {
 		String text;
+		String tooltip;
 
 		String language;
 		Control::TextDirection text_direction = Control::TEXT_DIRECTION_INHERITED;
@@ -66,6 +67,8 @@ private:
 
 		bool disabled = false;
 		bool hidden = false;
+		bool truncated = false;
+
 		Variant metadata;
 		int ofs_cache = 0;
 		int size_cache = 0;
@@ -168,6 +171,7 @@ private:
 
 protected:
 	virtual void gui_input(const Ref<InputEvent> &p_event) override;
+	virtual String get_tooltip(const Point2 &p_pos) const override;
 
 	bool _set(const StringName &p_name, const Variant &p_value) { return property_helper.property_set_value(p_name, p_value); }
 	bool _get(const StringName &p_name, Variant &r_ret) const { return property_helper.property_get_value(p_name, r_ret); }
@@ -192,6 +196,9 @@ public:
 	void set_tab_title(int p_tab, const String &p_title);
 	String get_tab_title(int p_tab) const;
 
+	void set_tab_tooltip(int p_tab, const String &p_tooltip);
+	String get_tab_tooltip(int p_tab) const;
+
 	void set_tab_text_direction(int p_tab, TextDirection p_text_direction);
 	TextDirection get_tab_text_direction(int p_tab) const;
 

scene/gui/tab_container.cpp

@@ -400,6 +400,7 @@ void TabContainer::move_tab_from_tab_container(TabContainer *p_from, int p_from_
 
 	// Get the tab properties before they get erased by the child removal.
 	String tab_title = p_from->get_tab_title(p_from_index);
+	String tab_tooltip = p_from->get_tab_tooltip(p_from_index);
 	Ref<Texture2D> tab_icon = p_from->get_tab_icon(p_from_index);
 	Ref<Texture2D> tab_button_icon = p_from->get_tab_button_icon(p_from_index);
 	bool tab_disabled = p_from->is_tab_disabled(p_from_index);
@@ -417,6 +418,7 @@ void TabContainer::move_tab_from_tab_container(TabContainer *p_from, int p_from_
 	move_child(moving_tabc, get_tab_control(p_to_index)->get_index(false));
 
 	set_tab_title(p_to_index, tab_title);
+	set_tab_tooltip(p_to_index, tab_tooltip);
 	set_tab_icon(p_to_index, tab_icon);
 	set_tab_button_icon(p_to_index, tab_button_icon);
 	set_tab_disabled(p_to_index, tab_disabled);
@@ -770,6 +772,14 @@ String TabContainer::get_tab_title(int p_tab) const {
 	return tab_bar->get_tab_title(p_tab);
 }
 
+void TabContainer::set_tab_tooltip(int p_tab, const String &p_tooltip) {
+	tab_bar->set_tab_tooltip(p_tab, p_tooltip);
+}
+
+String TabContainer::get_tab_tooltip(int p_tab) const {
+	return tab_bar->get_tab_tooltip(p_tab);
+}
+
 void TabContainer::set_tab_icon(int p_tab, const Ref<Texture2D> &p_icon) {
 	if (tab_bar->get_tab_icon(p_tab) == p_icon) {
 		return;
@@ -978,6 +988,8 @@ void TabContainer::_bind_methods() {
 	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_tooltip", "tab_idx", "tooltip"), &TabContainer::set_tab_tooltip);
+	ClassDB::bind_method(D_METHOD("get_tab_tooltip", "tab_idx"), &TabContainer::get_tab_tooltip);
 	ClassDB::bind_method(D_METHOD("set_tab_icon", "tab_idx", "icon"), &TabContainer::set_tab_icon);
 	ClassDB::bind_method(D_METHOD("get_tab_icon", "tab_idx"), &TabContainer::get_tab_icon);
 	ClassDB::bind_method(D_METHOD("set_tab_disabled", "tab_idx", "disabled"), &TabContainer::set_tab_disabled);

scene/gui/tab_container.h

@@ -155,6 +155,9 @@ public:
 	void set_tab_title(int p_tab, const String &p_title);
 	String get_tab_title(int p_tab) const;
 
+	void set_tab_tooltip(int p_tab, const String &p_tooltip);
+	String get_tab_tooltip(int p_tab) const;
+
 	void set_tab_icon(int p_tab, const Ref<Texture2D> &p_icon);
 	Ref<Texture2D> get_tab_icon(int p_tab) const;