Customization

Visual customization: Colors, shapes, specific UI components

You can customize the Flutter Unified Checkout to supports visual customization, which allows you to match the design of your app

You can modify colors, fonts, and more by using the instance of appearance class.

Colors

Customize the colors in the mobile Payment Element by modifying the color categories. Each color category determines the color of one or more components in the UI. For example, primary defines the color of the Pay button

Color Category	Usage
primary	Primary defines the color of the Pay button and selected items
background	The color used for the background of your Payment page
componentBackground	The color used for the background of inputs, tabs, and other components
componentBorder	The color used for the external border of inputs, tabs, and other components in your PaymentSheet
componentDivider	The color used for the internal border (meaning the border is shared with another component) of inputs, tabs, and other components in your PaymentSheet
primaryText	The color of the header text in your Payment page
secondaryText	The color of the label text of input fields
componentText	The color of the input text in your PaymentSheet components, such as the user's card number or zip code
placeholderText	The color of the placeholder text of input fields
icon	The color used for icons in your Payment Sheet, such as the close (x) button
error	The color used to indicate errors or destructive actions in your Payment Sheet

For using custom colors for SDK, you should create an instance of ColorsObject class by passing the above attributes to its constructor. Now, you have to create an instance of DynamicColors class by invoking its constructor and passing the object of ColorsObject class created earlier. Finally, you have to create an instance of Appearance class by passing the object of DynamicColors class.

Consider the below code for your reference.

ColorsObject colorsObject = ColorsObject(
     primary: '#F8F8F2',
      background: '#00FF00',
      componentBackground: '#E6DB74',
      componentBorder: '#FD971F',
      componentDivider: '#FD971F',
      primaryText: '#F8F8F2',
      secondaryText: '#75715E',
      componentText: '#AE81FF',
      placeholderText: '#E69F66',
      icon: '#F92672',
      error: '#F92672'
    );

    DynamicColors colors =
        DynamicColors(light: colorsObject);
    PrimaryButton primaryButton = PrimaryButton(colors: colors);

    Appearance appearance = Appearance(
      colors: colors,
      primaryButton: primaryButton,
    );

Configuration and Appearance

Now, create an instance of Configuration class by invoking its constructor and passing the object of Appearance class created above. Then, you have to create an instance of PaymentSheetParams class by invoking its constructor and passing the object of Configuration class created earlier.

Consider the below code for your reference.

  Configuration configuration= Configuration(appearance: appearance)
  configuration.displaySavedPaymentMethods: true,
  configuration.displaySavedPaymentMethodsCheckbox: true,
 
  PaymentSheetParams params = PaymentSheetParams(
      publishableKey: "YOUR_PUBLISHABLE_KEY",
      clientSecret: clientSecret,
      configuration: configuration,
    );

Set displaySavedPaymentMethods to false to disable saved cards.

Set displaySavedPaymentMethodsCheckbox to false to stop your users from saving their payment methods. Set disableBranding to false to disable PaySwitcher branding. Set primaryButtonLabel to "Pay Button Text" to display custom text Set paymentSheetHeaderLabel to "Heading Text" to display custom heading

Custom Placeholders And Branding

To set custom placeholder text for card number, expiry date or cvv input fields, you may set the placeholder property for these as shown below.

configuration.placeholder.cardNumber = "YOUR_CUSTOM_CARD_NUMBER_PLACEHOLDER"
configuration.placeholder.expiryDate = "YOUR_CUSTOM_EXPIRY_DATE_PLACEHOLDER"
configuration.placeholder.cvv = "YOUR_CUSTOM_CVV_PLACEHOLDER"

To disable PaySwitcher branding in the SDK, you may set the disableBranding property to true

configuration.disableBranding = true

Finally, you can pass the object of PaymentSheetParams to initPaymentSheet as shown in the previous section.

Note To support dark mode, pass objects of ColorsObject class for both light and dark colors to constructor of DynamicColors class like below.

ColorsObject lightColorsObject = ColorsObject(
     primary: '#F8F8F2',
      background: '#00FF00',
      componentBackground: '#E6DB74',
      componentBorder: '#FD971F',
      componentDivider: '#FD971F',
      primaryText: '#F8F8F2',
      secondaryText: '#75715E',
      componentText: '#AE81FF',
      placeholderText: '#E69F66',
      icon: '#F92672',
      error: '#F92672'
    );
    
 ColorsObject darkColorsObject = ColorsObject(
      primary: '#00ff0099',
      background: '#ff0000',
      componentBackground: '#ff0080',
      componentBorder: '#62ff08',
      componentDivider: '#d6de00',
      primaryText: '#5181fc',
      secondaryText: '#ff7b00',
      componentText: '#00ffff',
      placeholderText: '#00ffff',
      icon: '#f0f0f0',
      error: '#0f0f0f',
    );

DynamicColors colors = DynamicColors(light: lightColorsObject,dark: darkColorsObject);

Shadow

You can customize the border radius, border width, and shadow used throughout the mobile Payment Element. Using an Object of inbuilt class Shapes.

Shape Category	Usage
color	shadow color of components of the payment page
intensity	shadow intensity across input fields, tabs and other components

Shadow shadow = Shadow(color:10.0, intensity: 10.0);

Shapes

You can customize the border radius, border width, and shadow used throughout the mobile Payment Element. Using an Object of inbuilt class Shapes.

Shape Category	Usage
borderRadius	radius of the border of the input fields, tabs and other components of the payment page
borderWidth	width of the border used to across input fields, tabs and other components
shadow	add Shadow to components

Shapes shapes = Shapes(borderRadius:10.0, borderWidth: 10.0, shadow: shadow);

Now you can test the payments on your app and go-live!

Languages

PaySwitcher Flutter SDK supports localization in 6 languages. The default locale is English (en). To override, you can send locale in the appearance object. You may refer the below code for your reference.

Appearance appearance = Appearance(
     ...
      locale: 'LOCALE_CODE'
    );

We support the following locales -

• Arabic (ar)

• Hebrew (he)

• German (de)

• English (en)

• English (en-GB )

• Japanese (ja)

• French (fr)

• French (Belgium) (fr-BE)

• Spanish (es)

• Catalan (ca)

• Portuguese (pt)

• Italian (it)

• Polish (pl)

• German (de)

• Dutch (nl)

• Dutch (Belgium) (nl-BE)

• Swedish (sv)

• Russian (ru)

• Lithuanian (lt)

• Czech (cs)

• Slovak (sk)

• Icelandic (is)

• Welsh (cy)

• Greek (el)

• Estonian (et)

• Arabic (ar)

• Finnish (fi)

• Norwegian (nb)

• Bosnian (bs)

• Danish (da)

• Malay (ms)

• Turkish (tr-CY)

Next step:

💳Payment methods setup