Fix various problems with tab-related icons

4 files changed, 118 insertions, 20 deletions

diff --git a/scene/gui/tab_container.cpp b/scene/gui/tab_container.cpp
index 292d80be9d..a29ba36bad 100644
--- a/scene/gui/tab_container.cpp
+++ b/scene/gui/tab_container.cpp
@@ -94,7 +94,7 @@ void TabContainer::_gui_input(const Ref<InputEvent> &p_event) {
 			return;
 		}
 
-		// Do not activate tabs when tabs is empty
+		// Do not activate tabs when tabs is empty.
 		if (get_tab_count() == 0)
 			return;
 
@@ -140,6 +140,76 @@ void TabContainer::_gui_input(const Ref<InputEvent> &p_event) {
 			pos.x -= tab_width;
 		}
 	}
+
+	Ref<InputEventMouseMotion> mm = p_event;
+
+	if (mm.is_valid()) {
+
+		Point2 pos(mm->get_position().x, mm->get_position().y);
+		Size2 size = get_size();
+
+		// Mouse must be on tabs in the tab header area.
+		if (pos.x < tabs_ofs_cache || pos.y > _get_top_margin()) {
+
+			if (menu_hovered || highlight_arrow > -1) {
+				menu_hovered = false;
+				highlight_arrow = -1;
+				update();
+			}
+			return;
+		}
+
+		Ref<Texture> menu = get_icon("menu");
+		if (popup) {
+
+			if (pos.x >= size.width - menu->get_width()) {
+				if (!menu_hovered) {
+					menu_hovered = true;
+					highlight_arrow = -1;
+					update();
+					return;
+				}
+			} else if (menu_hovered) {
+				menu_hovered = false;
+				update();
+			}
+
+			if (menu_hovered) {
+				return;
+			}
+		}
+
+		// Do not activate tabs when tabs is empty.
+		if ((get_tab_count() == 0 || !buttons_visible_cache) && menu_hovered) {
+			highlight_arrow = -1;
+			update();
+			return;
+		}
+
+		int popup_ofs = 0;
+		if (popup) {
+			popup_ofs = menu->get_width();
+		}
+
+		Ref<Texture> increment = get_icon("increment");
+		Ref<Texture> decrement = get_icon("decrement");
+		if (pos.x >= size.width - increment->get_width() - popup_ofs) {
+
+			if (highlight_arrow != 1) {
+				highlight_arrow = 1;
+				update();
+			}
+		} else if (pos.x >= size.width - increment->get_width() - decrement->get_width() - popup_ofs) {
+
+			if (highlight_arrow != 0) {
+				highlight_arrow = 0;
+				update();
+			}
+		} else if (highlight_arrow > -1) {
+			highlight_arrow = -1;
+			update();
+		}
+	}
 }
 
 void TabContainer::_notification(int p_what) {
@@ -203,9 +273,11 @@ void TabContainer::_notification(int p_what) {
 			Ref<StyleBox> tab_fg = get_stylebox("tab_fg");
 			Ref<StyleBox> tab_disabled = get_stylebox("tab_disabled");
 			Ref<Texture> increment = get_icon("increment");
+			Ref<Texture> increment_hl = get_icon("increment_highlight");
 			Ref<Texture> decrement = get_icon("decrement");
+			Ref<Texture> decrement_hl = get_icon("decrement_highlight");
 			Ref<Texture> menu = get_icon("menu");
-			Ref<Texture> menu_hl = get_icon("menu_hl");
+			Ref<Texture> menu_hl = get_icon("menu_highlight");
 			Ref<Font> font = get_font("font");
 			Color font_color_fg = get_color("font_color_fg");
 			Color font_color_bg = get_color("font_color_bg");
@@ -332,7 +404,7 @@ void TabContainer::_notification(int p_what) {
 			x = get_size().width;
 			if (popup) {
 				x -= menu->get_width();
-				if (mouse_x_cache > x)
+				if (menu_hovered)
 					menu_hl->draw(get_canvas_item(), Size2(x, (header_height - menu_hl->get_height()) / 2));
 				else
 					menu->draw(get_canvas_item(), Size2(x, (header_height - menu->get_height()) / 2));
@@ -340,23 +412,26 @@ void TabContainer::_notification(int p_what) {
 
 			// Draw the navigation buttons.
 			if (buttons_visible_cache) {
-				int y_center = header_height / 2;
 
 				x -= increment->get_width();
-				increment->draw(canvas,
-						Point2(x, y_center - (increment->get_height() / 2)),
-						Color(1, 1, 1, last_tab_cache < tabs.size() - 1 ? 1.0 : 0.5));
+				if (last_tab_cache < tabs.size() - 1) {
+					draw_texture(highlight_arrow == 1 ? increment_hl : increment, Point2(x, (header_height - increment->get_height()) / 2));
+				} else {
+					draw_texture(increment, Point2(x, (header_height - increment->get_height()) / 2), Color(1, 1, 1, 0.5));
+				}
 
 				x -= decrement->get_width();
-				decrement->draw(canvas,
-						Point2(x, y_center - (decrement->get_height() / 2)),
-						Color(1, 1, 1, first_tab_cache > 0 ? 1.0 : 0.5));
+				if (first_tab_cache > 0) {
+					draw_texture(highlight_arrow == 0 ? decrement_hl : decrement, Point2(x, (header_height - decrement->get_height()) / 2));
+				} else {
+					draw_texture(decrement, Point2(x, (header_height - decrement->get_height()) / 2), Color(1, 1, 1, 0.5));
+				}
 			}
 		} break;
 		case NOTIFICATION_THEME_CHANGED: {
 
 			minimum_size_changed();
-			call_deferred("_on_theme_changed"); //wait until all changed theme
+			call_deferred("_on_theme_changed"); // Wait until all changed theme.
 		} break;
 	}
 }
@@ -367,6 +442,14 @@ void TabContainer::_on_theme_changed() {
 	}
 }
 
+void TabContainer::_on_mouse_exited() {
+	if (menu_hovered || highlight_arrow > -1) {
+		menu_hovered = false;
+		highlight_arrow = -1;
+		update();
+	}
+}
+
 int TabContainer::_get_tab_width(int p_index) const {
 
 	ERR_FAIL_INDEX_V(p_index, get_tab_count(), 0);
@@ -894,6 +977,7 @@ void TabContainer::set_use_hidden_tabs_for_min_size(bool p_use_hidden_tabs) {
 bool TabContainer::get_use_hidden_tabs_for_min_size() const {
 	return use_hidden_tabs_for_min_size;
 }
+
 void TabContainer::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_gui_input"), &TabContainer::_gui_input);
@@ -925,6 +1009,7 @@ void TabContainer::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_child_renamed_callback"), &TabContainer::_child_renamed_callback);
 	ClassDB::bind_method(D_METHOD("_on_theme_changed"), &TabContainer::_on_theme_changed);
+	ClassDB::bind_method(D_METHOD("_on_mouse_exited"), &TabContainer::_on_mouse_exited);
 	ClassDB::bind_method(D_METHOD("_update_current_tab"), &TabContainer::_update_current_tab);
 
 	ADD_SIGNAL(MethodInfo("tab_changed", PropertyInfo(Variant::INT, "tab")));
@@ -947,14 +1032,17 @@ TabContainer::TabContainer() {
 	first_tab_cache = 0;
 	last_tab_cache = 0;
 	buttons_visible_cache = false;
+	menu_hovered = false;
+	highlight_arrow = -1;
 	tabs_ofs_cache = 0;
 	current = 0;
 	previous = 0;
-	mouse_x_cache = 0;
 	align = ALIGN_CENTER;
 	tabs_visible = true;
 	popup = NULL;
 	drag_to_rearrange_enabled = false;
 	tabs_rearrange_group = -1;
 	use_hidden_tabs_for_min_size = false;
+
+	connect("mouse_exited", this, "_on_mouse_exited");
 }
diff --git a/scene/gui/tab_container.h b/scene/gui/tab_container.h
index 0314f86837..0c17ebc3ae 100644
--- a/scene/gui/tab_container.h
+++ b/scene/gui/tab_container.h
@@ -46,7 +46,6 @@ public:
 	};
 
 private:
-	int mouse_x_cache;
 	int first_tab_cache;
 	int tabs_ofs_cache;
 	int last_tab_cache;
@@ -54,6 +53,8 @@ private:
 	int previous;
 	bool tabs_visible;
 	bool buttons_visible_cache;
+	bool menu_hovered;
+	int highlight_arrow;
 	TabAlign align;
 	Control *_get_tab(int p_idx) const;
 	int _get_top_margin() const;
@@ -65,6 +66,7 @@ private:
 	Vector<Control *> _get_tabs() const;
 	int _get_tab_width(int p_index) const;
 	void _on_theme_changed();
+	void _on_mouse_exited();
 	void _update_current_tab();
 
 protected:
diff --git a/scene/gui/tabs.cpp b/scene/gui/tabs.cpp
index 7b0836cd28..93b091e8d0 100644
--- a/scene/gui/tabs.cpp
+++ b/scene/gui/tabs.cpp
@@ -226,12 +226,6 @@ void Tabs::_notification(int p_what) {
 			minimum_size_changed();
 			update();
 		} break;
-		case NOTIFICATION_MOUSE_EXIT: {
-			rb_hover = -1;
-			cb_hover = -1;
-			hover = -1;
-			update();
-		} break;
 		case NOTIFICATION_RESIZED: {
 			_update_cache();
 			_ensure_no_over_offset();
@@ -597,6 +591,15 @@ void Tabs::_update_cache() {
 	}
 }
 
+void Tabs::_on_mouse_exited() {
+
+	rb_hover = -1;
+	cb_hover = -1;
+	hover = -1;
+	highlight_arrow = -1;
+	update();
+}
+
 void Tabs::add_tab(const String &p_str, const Ref<Texture> &p_icon) {
 
 	Tab t;
@@ -948,6 +951,7 @@ void Tabs::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_gui_input"), &Tabs::_gui_input);
 	ClassDB::bind_method(D_METHOD("_update_hover"), &Tabs::_update_hover);
+	ClassDB::bind_method(D_METHOD("_on_mouse_exited"), &Tabs::_on_mouse_exited);
 	ClassDB::bind_method(D_METHOD("get_tab_count"), &Tabs::get_tab_count);
 	ClassDB::bind_method(D_METHOD("set_current_tab", "tab_idx"), &Tabs::set_current_tab);
 	ClassDB::bind_method(D_METHOD("get_current_tab"), &Tabs::get_current_tab);
@@ -1024,4 +1028,6 @@ Tabs::Tabs() {
 	hover = -1;
 	drag_to_rearrange_enabled = false;
 	tabs_rearrange_group = -1;
+
+	connect("mouse_exited", this, "_on_mouse_exited");
 }
diff --git a/scene/gui/tabs.h b/scene/gui/tabs.h
index 7c54f1acf2..a762b5b9cb 100644
--- a/scene/gui/tabs.h
+++ b/scene/gui/tabs.h
@@ -89,7 +89,7 @@ private:
 	bool cb_pressing;
 	CloseButtonDisplayPolicy cb_displaypolicy;
 
-	int hover; // hovered tab
+	int hover; // Hovered tab.
 	int min_width;
 	bool scrolling_enabled;
 	bool drag_to_rearrange_enabled;
@@ -101,6 +101,8 @@ private:
 	void _update_hover();
 	void _update_cache();
 
+	void _on_mouse_exited();
+
 protected:
 	void _gui_input(const Ref<InputEvent> &p_event);
 	void _notification(int p_what);