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feat: add activePreviousDot option to highlight previous dots #30

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feat: add activePreviousDot option to highlight previous dots #30

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3 changes: 3 additions & 0 deletions example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
shouldUseLaunchSchemeArgsEnv = "YES">
<MacroExpansion>
<BuildableReference
Expand Down Expand Up @@ -54,11 +55,13 @@
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
customLLDBInitFile = "$(SRCROOT)/Flutter/ephemeral/flutter_lldbinit"
launchStyle = "0"
useCustomWorkingDirectory = "NO"
ignoresPersistentStateOnLaunch = "NO"
debugDocumentVersioning = "YES"
debugServiceExtension = "internal"
enableGPUValidationMode = "1"
allowLocationSimulation = "YES">
<BuildableProductRunnable
runnableDebuggingMode = "0">
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9 changes: 9 additions & 0 deletions example/lib/main.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -215,6 +215,15 @@ class MyAppState extends State<MyApp> {
animate: true,
),
]),
_buildRow([
const Text('Active Previous Dot'),
DotsIndicator(
dotsCount: _totalDots,
position: _currentPosition,
activePreviousDot: true,
decorator: decorator,
),
]),
],
),
),
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10 changes: 8 additions & 2 deletions lib/src/dots_indicator.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,8 @@ class DotsIndicator extends StatelessWidget {
/// Duration of the animation when the position changes.
final Duration animationDuration;

final bool activePreviousDot;

DotsIndicator({
super.key,
required this.dotsCount,
Expand All @@ -43,6 +45,7 @@ class DotsIndicator extends StatelessWidget {
this.fadeOutDistance = 0,
this.animate = false,
this.animationDuration = const Duration(milliseconds: 200),
this.activePreviousDot = false,
}) : assert(dotsCount > 0, 'dotsCount must be superior to zero'),
assert(position >= 0.0, 'position must be superior or equals to zero'),
assert(
Expand Down Expand Up @@ -99,7 +102,9 @@ class DotsIndicator extends StatelessWidget {
final double absPositionIndexRelation = (position - index).abs();
final bool isCurrentlyVisible = absPositionIndexRelation <= fadeOutDistance;

final double lerpValue = min(1.0, absPositionIndexRelation).toDouble();
final double lerpValue = activePreviousDot && index <= position
? 0.0 // Set lerpValue to 0 for active state
: min(1.0, absPositionIndexRelation).toDouble();

Size size = Size.lerp(
decorator.getActiveSize(index),
Expand Down Expand Up @@ -142,7 +147,8 @@ class DotsIndicator extends StatelessWidget {
: decorator.spacing,
decoration: ShapeDecoration(
color: Color.lerp(
decorator.getActiveColor(index) ?? Theme.of(context).primaryColor,
decorator.getActiveColor(index) ??
Theme.of(context).primaryColor,
decorator.getColor(index),
lerpValue,
),
Expand Down