A package containing helpful utility functions and widgets for Flutter projects.
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Popular Utils 🔥
- Responsive widget that rebuilds for mobile, tablet, and desktop views.
ResponsiveView(mobile: YOUR_WIDGET, tablet: YOUR_WIDGET, desktop: YOUR_WIDGET)
- Shorthands for
MediaQuery.of(context).size.HEIGHT/WIDTH * SOME_FRACTION
heightFrac(context, SOME_FRACTION)
widthFrac(context, SOME_FRACTION)
- Number formatting.
largeNumberFormatter(int number)
-> Example: 1812212 to "1.8m"numberPostfix(int number)
-> Example: 4 to "th", or 3 to "rd"
- And much more, just scroll down for the list of functions/widgets!
Example Gif 📸
![](https://github.com/mattrltrent/core_utils/blob/main/resources/example.gif?raw=true)
Functions: Numbers 📜
Checks if the integer passed is plural.
bool isPlural(int number);
Example: 13 -> true
Converts large numbers into smaller representations with letters.
String largeNumberFormatter(
int number, {
String billionLetter = "b",
String millionLetter = "m",
String thousandLetter = "k",
});
Example: 1,812,398 -> "1.8m"
Adds a postfix to numbers.
String numberPostfix(int number);
Example: 4 -> "4th"
Functions: Sizing 📜
Height fraction of screen, up to a set point.
double heightBreakpointFrac(Buildcontext context, double fraction, double lockPoint);
Example: If you set fraction as 1/4, then this will return 1/4 * screen height up to the point that you set as lockPoint.
Width fraction of screen, up to a set point.
double widthBreakpointFrac(Buildcontext context, double fraction, double lockPoint);
Example: If you set fraction as 1/4, then this will return 1/4 * screen width up to the point that you set as lockPoint.
Height fraction of screen.
double heightFrac(BuildContext context, double fraction);
Example: If you set fraction as 1/5, then it will return 1/5 * screen height.
Width fraction of screen.
double widthFrac(BuildContext context, double fraction);
Example: If you set fraction as 1/5, then it will return 1/5 * screen width.
Height excluding top or bottom safe area.
double heightWithoutSafeArea(BuildContext context,{bool withoutTopSafeArea = true, bool withoutBottomSafeArea = true});
Example: Will return the height of the screen excluding either the top or bottom safe area heights.
Number until limit.
double numberUntilLimit(double number, double limit);
Example: If number is the screen width and limit is 200, then this will return the screen width until limit is reached, then it will just return 200.
Functions: Types 📜
Checks if value is null.
bool isNull(dynamic value);
Example: If null is passed, this will return true. Otherwise, it would return false.
Checks if value is not null.
bool notNull(dynamic value);
Example: If "14" is passed, this will return true.
Functions: Validators 📜
Passed String is empty checker.
bool emptyValidator(String value);
Example: If " " is passed, then it will return false.
Passed list of Strings is empty checker.
bool multipleEmptyValidator(List<String> values);
Example: If "test1", "test2", " "
is passed, then it will return false;
Widgets: Sizing 📜
Mobile, Tablet, and Desktop view builder.
ResponsiveView(
mobile: Scaffold(...),
tablet: Scaffold(...),
desktop: Scaffold(...),
);
Example: Builds out 3 different views based on screen width breakpoints. Breakpoint values can be customized.
SizedBox same height as bottom safe area.
SimulatedBottomSafeArea(
heightMultiplier: 2,
);
Example: Returns a SizedBox with the height of the bottom safe area * heightMultiplier. Useful for lists where you desire them to be scrolled without being wrapped with a SafeArea, but don't want the last list item to be obscured by it. Usually, placed at the end of a long list of widgets.
Additional Info 📣
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The package is always open to improvements, suggestions, and additions!
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I'll deal with PRs and issues as soon as I can!