TdxScaleFactor Class

Stores a scale factor for visual elements.

Declaration

TdxScaleFactor = class(
    TObject
)

Remarks

DevExpress controls use a scale factor to calculate pixel dimensions of DPI-aware forms and visual elements. A scale factor consists of integer numerator and denominator values stored in a TdxScaleFactor instance. The TdxScaleFactor class also implements multiple auxiliary methods that scale geometry.

Main API Members

The list below outlines key members of the TdxScaleFactor class. These members allow you to change the stored scale factor and scale geometry according to the required numerator and denominator values.

Scale Factor

Denominator

Returns the scale factor’s denominator.

Numerator

Returns the scale factor’s numerator.

Geometry Scale Operations

Apply

Scales specified integer-based (pixel) dimensions according to current numerator and denominator values.

ApplyF

Scales specified floating-point dimensions according to current numerator and denominator values.

Change

Multiplies stored numerator and denominator by specified values.

Revert

Applies the reverted scale factor to specified integer-based (pixel) dimensions.

RevertF

Applies the reverted scale factor to specified floating-point dimensions.

General-Purpose API Members

Assign

Assigns new numerator and denominator values.

Assigned

Allows you to identify if the scale factor corresponds to unscaled geometry (at 96 DPI).

Equals

Compares two scale factors.

ListenerAdd | ListenerRemove

Manage the list of objects that track scale factor changes.

Direct TdxScaleFactor Class References

The following API members reference a TdxScaleFactor object:

TcxScalableComponent.ScaleFactor

Returns the component’s scale factor.

TdxForm.ScaleFactor

Returns the form’s scale factor.

TdxCustomForm.ScaleFactor

Returns the form’s scale factor.

Inheritance

TObject

TdxScaleFactor