Allow to change some styles in CallButton.

ui/widgets/call_button.cpp

@@ -26,6 +26,10 @@ CallButton::CallButton(
 : RippleButton(parent, stFrom.button.ripple)
 , _stFrom(&stFrom)
 , _stTo(stTo) {
+	init();
+}
+
+void CallButton::init() {
 	resize(_stFrom->button.width, _stFrom->button.height);
 
 	_bgMask = RippleAnimation::ellipseMask(QSize(_stFrom->bgSize, _stFrom->bgSize));
@@ -221,6 +225,18 @@ void CallButton::setColorOverrides(rpl::producer<CallButtonColors> &&colors) {
 	}, lifetime());
 }
 
+void CallButton::setStyle(
+		const style::CallButton &stFrom,
+		const style::CallButton *stTo) {
+	if (_stFrom == &stFrom && _stTo == stTo) {
+		return;
+	}
+	_stFrom = &stFrom;
+	_stTo = stTo;
+	init();
+	update();
+}
+
 QPoint CallButton::prepareRippleStartPosition() const {
 	return mapFromGlobal(QCursor::pos()) - _stFrom->button.rippleAreaPosition;
 }

ui/widgets/call_button.h

@@ -31,6 +31,10 @@ public:
 	void setText(rpl::producer<QString> text);
 	void setColorOverrides(rpl::producer<CallButtonColors> &&colors);
 
+	void setStyle(
+		const style::CallButton &stFrom,
+		const style::CallButton *stTo = nullptr);
+
 protected:
 	void paintEvent(QPaintEvent *e) override;
 
@@ -40,6 +44,7 @@ protected:
 	QPoint prepareRippleStartPosition() const override;
 
 private:
+	void init();
 	QPoint iconPosition(not_null<const style::CallButton*> st) const;
 	void mixIconMasks();