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Add Slide Direction Enum to Control Slide-In and Slide-Out Direction on RotateAnimatedText #324

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Add Slide Direction Enum to Control Slide-In and Slide-Out Direction on RotateAnimatedText #324

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94ed6d1
feat: add SlideDirection enum and logic for slide-in-out tween
fauziridwan1709 Sep 10, 2023
d01e256
feat: update default value for slideDirection
fauziridwan1709 Sep 10, 2023
a0da40a
feat: make both slideInTween and slideOutTween as late final variables
fauziridwan1709 Sep 10, 2023
5f7afbe
feat: remove unrelated comments
fauziridwan1709 Sep 10, 2023
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81 changes: 73 additions & 8 deletions lib/src/rotate.dart
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Original file line number Diff line number Diff line change
@@ -1,6 +1,15 @@
import 'package:flutter/material.dart';

import 'animated_text.dart';

/// Enum to control the slide direction.
enum SlideDirection {
leftToRight,
rightToLeft,
topToBottom,
bottomToTop,
}

/// Animated Text that rotates a [Text] in and then out.
///
/// ![Rotate example](https://raw.githubusercontent.com/aagarwal1012/Animated-Text-Kit/master/display/rotate.gif)
Expand Down Expand Up @@ -30,6 +39,11 @@ class RotateAnimatedText extends AnimatedText {
/// By default, it is set to true.
final bool rotateOut;

/// Control slide animation direction.
///
/// By default. it is set to [SlideDirection.topToBottom]
final SlideDirection slideDirection;

RotateAnimatedText(
String text, {
TextAlign textAlign = TextAlign.start,
Expand All @@ -39,6 +53,7 @@ class RotateAnimatedText extends AnimatedText {
this.alignment = Alignment.center,
this.textDirection = TextDirection.ltr,
this.rotateOut = true,
this.slideDirection = SlideDirection.topToBottom,
}) : super(
text: text,
textAlign: textAlign,
Expand All @@ -55,10 +70,35 @@ class RotateAnimatedText extends AnimatedText {

final inIntervalEnd = rotateOut ? 0.4 : 1.0;

_slideIn = AlignmentTween(
begin: Alignment.topCenter.add(alignment).resolve(direction),
end: Alignment.center.add(alignment).resolve(direction),
).animate(
late final AlignmentTween slideInTween;
switch (slideDirection) {
case SlideDirection.leftToRight:
slideInTween = AlignmentTween(
begin: Alignment.centerLeft.add(alignment).resolve(direction),
end: Alignment.center.add(alignment).resolve(direction),
);
break;
case SlideDirection.rightToLeft:
slideInTween = AlignmentTween(
begin: Alignment.centerRight.add(alignment).resolve(direction),
end: Alignment.center.add(alignment).resolve(direction),
);
break;
case SlideDirection.topToBottom:
slideInTween = AlignmentTween(
begin: Alignment.topCenter.add(alignment).resolve(direction),
end: Alignment.center.add(alignment).resolve(direction),
);
break;
case SlideDirection.bottomToTop:
slideInTween = AlignmentTween(
begin: Alignment.bottomCenter.add(alignment).resolve(direction),
end: Alignment.center.add(alignment).resolve(direction),
);
break;
}

_slideIn = slideInTween.animate(
CurvedAnimation(
parent: controller,
curve: Interval(0.0, inIntervalEnd, curve: Curves.linear),
Expand All @@ -73,10 +113,35 @@ class RotateAnimatedText extends AnimatedText {
);

if (rotateOut) {
_slideOut = AlignmentTween(
begin: Alignment.center.add(alignment).resolve(direction),
end: Alignment.bottomCenter.add(alignment).resolve(direction),
).animate(
late final AlignmentTween slideOutTween;
switch (slideDirection) {
case SlideDirection.leftToRight:
slideOutTween = AlignmentTween(
begin: Alignment.center.add(alignment).resolve(direction),
end: Alignment.centerRight.add(alignment).resolve(direction),
);
break;
case SlideDirection.rightToLeft:
slideOutTween = AlignmentTween(
begin: Alignment.center.add(alignment).resolve(direction),
end: Alignment.centerLeft.add(alignment).resolve(direction),
);
break;
case SlideDirection.topToBottom:
slideOutTween = AlignmentTween(
begin: Alignment.center.add(alignment).resolve(direction),
end: Alignment.bottomCenter.add(alignment).resolve(direction),
);
break;
case SlideDirection.bottomToTop:
slideOutTween = AlignmentTween(
begin: Alignment.center.add(alignment).resolve(direction),
end: Alignment.topCenter.add(alignment).resolve(direction),
);
break;
}

_slideOut = slideOutTween.animate(
CurvedAnimation(
parent: controller,
curve: const Interval(0.7, 1.0, curve: Curves.linear),
Expand Down