Add auto focus timeline and bezier scale on animation editor

Add a button at the bottom of the animation editor that change the zoom based on the animation length and the bezier scale based on the values and handles of the displayed tracks. The icon and the tooltip of the button change depending if the bezier editor is displayed or not.

Some refactor was made in animation_track_editor.cpp to remove code duplication with the visibility check of the tracks.

This should help with the issue #85826

1 files changed, 9 insertions, 0 deletions

diff --git a/editor/animation_track_editor.h b/editor/animation_track_editor.h
index d0da7b0062..d2d8462dbc 100644
--- a/editor/animation_track_editor.h
+++ b/editor/animation_track_editor.h
@@ -182,6 +182,9 @@ class AnimationTimelineEdit : public Range {
 	virtual void gui_input(const Ref<InputEvent> &p_event) override;
 	void _track_added(int p_track);
 
+	float _get_zoom_scale(double p_zoom_value) const;
+	void _scroll_to_start();
+
 protected:
 	static void _bind_methods();
 	void _notification(int p_what);
@@ -197,6 +200,7 @@ public:
 	void set_track_edit(AnimationTrackEdit *p_track_edit);
 	void set_zoom(Range *p_zoom);
 	Range *get_zoom() const { return zoom; }
+	void auto_fit();
 
 	void set_play_position(float p_pos);
 	float get_play_position() const;
@@ -404,6 +408,8 @@ class AnimationTrackEditor : public VBoxContainer {
 	Button *snap = nullptr;
 	Button *bezier_edit_icon = nullptr;
 	OptionButton *snap_mode = nullptr;
+	Button *auto_fit = nullptr;
+	Button *auto_fit_bezier = nullptr;
 
 	Button *imported_anim_warning = nullptr;
 	void _show_imported_anim_warning();
@@ -591,6 +597,9 @@ class AnimationTrackEditor : public VBoxContainer {
 	Button *view_group = nullptr;
 	Button *selected_filter = nullptr;
 
+	void _auto_fit();
+	void _auto_fit_bezier();
+
 	void _selection_changed();
 
 	ConfirmationDialog *track_copy_dialog = nullptr;