flutter_screen_scaler 3.0.0

A package to scale widgets and font sizes based on screen percentages, with convenient extension methods (e.g., `50.h`, `30.w`, `16.sp`).

Changelog

3.0.0 YYYY-MM-DD

Breaking Changes

• Refactored ScreenScaler to use a singleton pattern.
  • Access the instance via ScreenScaler.I.
  • Initialization is now done via a static method: ScreenScaler.init(context).
  • The constructor ScreenScaler() is no longer public; direct instantiation is replaced by the singleton.
• Simplified Core Scaling Logic for getWidth and getHeight.
  • These methods now consistently return a direct percentage of the screen width/height.
  • The previous complex scaling logic based on _fixedWidth and _fixedHeight (which involved log and screen ratio adjustments) has been removed to ensure straightforward percentage scaling.
  • The constants _fixedWidth and _fixedHeight have been removed as they are no longer used by the primary scaling methods.
• Removed Nullable Parameters.
  • Methods like getWidth(double? percentage), getHeight(double? percentage), and getTextSize(double? percentage) now require non-nullable double parameters.

Added

• Extension Methods for Concise Scaling.
  • Added extension methods on num for convenient scaling (after ScreenScaler.init(context) has been called):
    • .h: Scales the number as a percentage of the screen height (e.g., 50.h).
    • .w: Scales the number as a percentage of the screen width (e.g., 30.w).
    • .sp: Scales the number as a responsive font size, linearly based on screen width relative to a reference width (e.g., 16.sp).
• New Responsive Font Scaling Method.
  • Added ScreenScaler.I.getResponsiveFontSize(double fontSize) for linear font scaling. This is used by the .sp extension.
  • A reference screen width (_kReferenceScreenWidthForText) is used for this scaling.
• Parent-Relative Scaling Methods.
  • Added ScreenScaler.I.scaleWidthFrom(Size parentSize, double percentage) to scale based on a percentage of the parent widget's width.
  • Added ScreenScaler.I.scaleHeightFrom(Size parentSize, double percentage) to scale based on a percentage of the parent widget's height.

Changed

• Improved Documentation.
  • Updated all Dartdoc comments for clarity, conciseness, and to reflect the new API and scaling logic.
  • Clarified the behavior of getTextSize (and its alias getFullScreen), noting its quadratic scaling behavior due to its formula.
• Code Quality.
  • Improved variable naming and use of final for local variables.
  • Introduced _kDefaultDecimalPlaces constant for rounding precision.
  • Added a debug warning if screen-dependent scaling methods are called before ScreenScaler.init(context).

Updated

• Example App.
  • The example in example/lib/main.dart has been updated to demonstrate the new singleton initialization, extension methods (.h, .w, .sp), and API usage.
• Unit Tests.
  • Tests in test/flutter_screen_scaler_test.dart have been updated to reflect all API changes, cover new extension methods, and test new functionalities like parent-relative scaling and responsive font scaling. Invalid null-check tests were removed due to non-nullable parameters.

1.0.0 17/06/2019

• Added support for getting the width dynamically using percentages.
• Added support for getting the height dynamically using percentages.
• Added support for getting the text size dynamically using percentages.

2.0.0 08/10/2019

• Completely rewrote the screen scaling methods.
• Added support for getting the padding dynamically using percentages.
• Added support for getting the margin dynamically using percentages.
• Added support for getting the a size dynamically using percentages.

2.1.0 18/12/2021

• Null Safety