Skip to main content

flutter - How to change ElevatedButton shape

Flutter - ElevatedButton Shape
The ElevatedButton class represents a material design elevated button. The flutter developers can use elevated buttons to add dimension to otherwise mostly flat layouts such as in long busy lists of content, or in wide spaces. The flutter developers should avoid using elevated buttons on already-elevated content such as dialogs or cards. The flutter developers can override the ElevatedButton style with its style parameter. The static styleFrom() method is a convenient way to create an ElevatedButton ButtonStyle from simple values.

The following flutter application development tutorial will demonstrate how to set or change an ElevatedButton widget’s shape. Here we will use the ElevatedButton class’s style property to change the ElevatedButton’s shape and make it a rounded corners rectangular shape. Here we also add padding to the ElevatedButton widget.

The ElevatedButton class’s style property value is a ButtonStyle object which customizes this button's appearance.

The ButtonStyle class represents the visual properties that most buttons have in common. The ButtonStyle class’s all properties are null by default.

ButtonStyle class’s many properties are MaterialStateProperty objects which resolve to different values depending on the button's state. The material state properties represent values that depend on a widget's material state.

The flutter developers can set or change the shape of an ElevatedButton by sending a value to the ButtonStyle class’s shape property. And the ButtonStyle class’s padding property allows them to add padding to an ElevatedButton widget.

The ButtonStyle class’s shape property defines the shape of the button's underlying Material.

The MaterialStateProperty resolveWith() is a convenient method for creating a MaterialStateProperty from a MaterialPropertyResolver function alone.

The RoundedRectangleBorder class represents a rectangular border with rounded corners. The RoundedRectangleBorder class borderRadius property value is a BorderRadiusGeometry object which defines the radii for each corner. Using this parameter value we make the ElevatedButton border specified corners rounded.

The BorderRadiusGeometry class represents the base class for BorderRadius that allows for text-direction-aware resolution. The BorderRadius class represents an immutable set of radii for each corner of a rectangle.

The BorderRadius.only({Radius topLeft = Radius.zero, Radius topRight = Radius.zero, Radius bottomLeft = Radius.zero, Radius bottomRight = Radius.zero}) constructor creates a border radius with only the given non-zero values. The other corners will be right angles.

Here we used this constructor to create a rounded corners ElevatedButton widget in which specified corners are rounded only. We make an ElevatedButton widget in which the top left and bottom right corners are rounded.

We also put padding to this ElevatedButton using the ButtonStyle class’s padding property. The ButtonStyle class padding property set the padding between the button's boundary and its child.

The EdgeInsets.symmetric({double vertical = 0.0, double horizontal = 0.0}) constructor creates insets with symmetrical vertical and horizontal offsets. Here we used this constructor to add padding to the ElevatedButton's horizontal and vertical sides.
main.dart

import 'package:flutter/material.dart';

void main(){
  runApp(
    MaterialApp(
      theme: ThemeData(primarySwatch: Colors.pink),
      home: Scaffold(
          appBar: AppBar(
              title: const Text("Flutter - ElevatedButton Shape")
          ),
          body: Center(
            child: ElevatedButton(
                onPressed: (){},
                child: const Text("Click Me"),
                style: ButtonStyle(
                    shape: MaterialStateProperty.resolveWith(
                            (states) => const RoundedRectangleBorder(
                            borderRadius: BorderRadius.only(
                                topLeft: Radius.circular(24),
                                bottomRight: Radius.circular(24)
                            )
                        )
                    ),
                    padding: MaterialStateProperty.resolveWith(
                            (states) => const EdgeInsets.symmetric(
                            horizontal: 64, vertical: 32
                        )
                    )
                )
            ),
          )
      ),
    ),
  );
}
Labels:

Popular posts from this blog

Restricting Jetpack Compose TextField to Numeric Input Only

Jetpack Compose has revolutionized Android development with its declarative approach, enabling developers to build modern, responsive UIs more efficiently. Among the many components provided by Compose, TextField is a critical building block for user input. However, ensuring that a TextField accepts only numeric input can pose challenges, especially when considering edge cases like empty fields, invalid characters, or localization nuances. In this blog post, we'll explore how to restrict a Jetpack Compose TextField to numeric input only, discussing both basic and advanced implementations. Why Restricting Input Matters Restricting user input to numeric values is a common requirement in apps dealing with forms, payment entries, age verifications, or any data where only numbers are valid. Properly validating input at the UI level enhances user experience, reduces backend validation overhead, and minimizes errors during data processing. Compose provides the flexibility to implement ...
Read more

jetpack compose - TextField remove underline

Compose TextField Remove Underline The TextField is the text input widget of android jetpack compose library. TextField is an equivalent widget of the android view system’s EditText widget. TextField is used to enter and modify text. The following jetpack compose tutorial will demonstrate to us how we can remove (actually hide) the underline from a TextField widget in an android application. We have to apply a simple trick to remove (hide) the underline from the TextField. The TextField constructor’s ‘colors’ argument allows us to set or change colors for TextField’s various components such as text color, cursor color, label color, error color, background color, focused and unfocused indicator color, etc. Jetpack developers can pass a TextFieldDefaults.textFieldColors() function with arguments value for the TextField ‘colors’ argument. There are many arguments for this ‘TextFieldDefaults.textFieldColors()’function such as textColor, disabledTextColor, backgroundColor, cursorC...
Read more

jetpack compose - Image clickable

Compose Image Clickable The Image widget allows android developers to display an image object to the app user interface using the jetpack compose library. Android app developers can show image objects to the Image widget from various sources such as painter resources, vector resources, bitmap, etc. Image is a very essential component of the jetpack compose library. Android app developers can change many properties of an Image widget by its modifiers such as size, shape, etc. We also can specify the Image object scaling algorithm, content description, etc. But how can we set a click event to an Image widget in a jetpack compose application? There is no built-in property/parameter/argument to set up an onClick event directly to the Image widget. This android application development tutorial will demonstrate to us how we can add a click event to the Image widget and make it clickable. Click event of a widget allow app users to execute a task such as showing a toast message by cli...
Read more