Customizing Line Height

Manage line heights through WindTheme: pre-defined keys, arbitrary values, and runtime customization.

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WindTheme.setLineHeight('custom', 1.2);
double height = WindTheme.getLineHeight('tight'); // 1.25

Default Line Heights#

WindTheme includes several pre-defined line heights mapped to intuitive keys. Values are multipliers applied to the font size.

For example:

For values outside the scale, use the leading-[value] syntax, where value is the desired multiplier.

WindTheme provides methods to check, retrieve, add, and remove line heights at runtime.

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// Check whether a line height exists
bool exists = WindTheme.hasLineHeight('normal');
print(exists); // Output: true

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// Retrieve a line height value
double height = WindTheme.getLineHeight('tight');
print(height); // Output: 1.25

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// Add a custom line height
WindTheme.setLineHeight('custom', 1.2);

// Update an existing line height
WindTheme.setLineHeight('snug', 1.4);

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// Remove a line height
WindTheme.removeLineHeight('custom');