Struct ContactDeviceDescriptor

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pub struct ContactDeviceDescriptor {
    pub x_range: Range,
    pub y_range: Range,
    pub x_unit: Unit,
    pub y_unit: Unit,
    pub pressure_range: Option<Range>,
    pub width_range: Option<Range>,
    pub height_range: Option<Range>,
}

Expand description

A ContactDeviceDescriptor describes the possible values touch contact properties can take on.

This descriptor can be used, for example, to determine where on a screen a touch made contact.

§Example

// Determine the scaling factor between the display and the touch device's x range.
let scaling_factor =
    display_width / (contact_descriptor._x_range.end - contact_descriptor._x_range.start);
// Use the scaling factor to scale the contact report's x position.
let hit_location =
    scaling_factor * (contact_report.position_x - contact_descriptor._x_range.start);

Fields§

§x_range: Range

The range of possible x values for this touch contact.

§y_range: Range

The range of possible y values for this touch contact.

§x_unit: Unit

The unit of measure for x_range.

§y_unit: Unit

The unit of measure for y_range.

§pressure_range: Option<Range>

The range of possible pressure values for this touch contact.

§width_range: Option<Range>

The range of possible widths for this touch contact.

§height_range: Option<Range>

The range of possible heights for this touch contact.

Trait Implementations§

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impl Clone for ContactDeviceDescriptor

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fn clone(&self) -> ContactDeviceDescriptor

Returns a duplicate of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for ContactDeviceDescriptor

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl PartialEq for ContactDeviceDescriptor

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fn eq(&self, other: &ContactDeviceDescriptor) -> bool

Tests for self and other values to be equal, and is used by ==.

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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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impl Eq for ContactDeviceDescriptor

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impl StructuralPartialEq for ContactDeviceDescriptor

Auto Trait Implementations§

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impl UnwindSafe for ContactDeviceDescriptor

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impl<T> Any for T
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Gets the TypeId of self. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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fn __clone_box(&self, _: Private) -> *mut ()

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Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more

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Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more

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Compare self to key and return true if they are equal.

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