Feature: BraceLabel, BraceText -- Packed brace with its label + several useful

methods

topics/objects.py

@@ -521,19 +521,57 @@ class Broadcast(LaggedStart):
 
         )
 
+class BraceLabel(VMobject):
+    CONFIG = {
+        "label_constructor" : TexMobject,
+        "label_scale" : 1,
+    }
+    def __init__(self, obj, text, brace_direction = DOWN, **kwargs):
+        VMobject.__init__(self, **kwargs)
+        self.brace_direction = brace_direction
+        if isinstance(obj, list): obj = VMobject(*obj)
+        self.brace = Brace(obj, brace_direction, **kwargs)
 
+        if isinstance(text, tuple) or isinstance(text, list):
+            self.label = self.label_constructor(*text, **kwargs)
+        else: self.label = self.label_constructor(str(text))
+        if self.label_scale != 1: self.label.scale(self.label_scale)
 
+        self.brace.put_at_tip(self.label)
+        self.submobjects = [self.brace, self.label]
 
+    def creation_anim(self, label_anim = FadeIn, brace_anim = GrowFromCenter):
+        return AnimationGroup(brace_anim(self.brace), label_anim(self.label))
 
+    def shift_brace(self, obj, **kwargs):
+        if isinstance(obj, list): obj = VMobject(*obj)
+        self.brace = Brace(obj, self.brace_direction, **kwargs)
+        self.brace.put_at_tip(self.label)
+        self.submobjects[0] = self.brace
+        return self
 
+    def change_label(self, *text, **kwargs):
+        self.label = self.label_constructor(*text, **kwargs)
+        if self.label_scale != 1: self.label.scale(self.label_scale)
 
+        self.brace.put_at_tip(self.label)
+        self.submobjects[1] = self.label
+        return self
 
+    def change_brace_label(self, obj, *text):
+        self.shift_brace(obj)
+        self.change_label(*text)
+        return self
 
+    def copy(self):
+        copy_mobject = copy.copy(self)
+        copy_mobject.brace = self.brace.copy()
+        copy_mobject.label = self.label.copy()
+        copy_mobject.submobjects = [copy_mobject.brace, copy_mobject.label]
 
+        return copy_mobject
 
-
-
-
-
-
-
+class BraceText(BraceLabel):
+    CONFIG = {
+        "label_constructor" : TextMobject
+    }