io.scanbot.sdk.ui.camera.util

Class ScaleTypeTransform

io.scanbot.sdk.ui.camera.util.ScaleTypeTransform

public class ScaleTypeTransform

Util methods for view size calculations

Field Detail

INSTANCE

public static ScaleTypeTransform INSTANCE

Util methods for view size calculations

Method Detail

getFillScaleWithBufferAspectRatio

@JvmStatic
 @NotNull
public static android.util.Pair<java.lang.Float,java.lang.Float> getFillScaleWithBufferAspectRatio(@NotNull
                                                                                                                        android.view.View container,
                                                                                                                        @NotNull
                                                                                                                        android.view.View view,
                                                                                                                        @NotNull
                                                                                                                        android.util.Size bufferSize)

Computes the scale by which a view has to scale in x and y in order to fill its parent while maintaining the buffer's aspect ratio.

Parameters:

container - A parent android.view.View that wraps view.

view - A child android.view.View of container.

bufferSize - A android.util.Size whose aspect ratio must be maintained whenscaling view inside its parent container.

Returns:

The scale by which view has to scale in x and y in order to fill its parent while maintaining bufferSize's aspect ratio.

getFitScaleWithBufferAspectRatio

@JvmStatic
 @NotNull
public static android.util.Pair<java.lang.Float,java.lang.Float> getFitScaleWithBufferAspectRatio(@NotNull
                                                                                                                       android.view.View container,
                                                                                                                       @NotNull
                                                                                                                       android.view.View view,
                                                                                                                       @NotNull
                                                                                                                       android.util.Size bufferSize)

Computes the scale by which a view has to scale in x and y in order to fit its parent while maintaining the buffer's aspect ratio.

Parameters:

container - A parent android.view.View that wraps view.

view - A child android.view.View of container.

bufferSize - A android.util.Size whose aspect ratio must be maintained whenscaling view inside its parent container.

Returns:

The scale by which view has to scale in x and y in order to fit its parent while maintaining bufferSize's aspect ratio.

getOriginOfCenteredView

@JvmStatic
 @NotNull
public static android.graphics.Point getOriginOfCenteredView(@NotNull
                                                                                  android.view.View container,
                                                                                  @NotNull
                                                                                  android.view.View view)

Computes the top left coordinates for the view to be centered inside its parent.

Parameters:

container - A parent android.view.View that wraps view.

view - A child android.view.View of container.

Returns:

A android.graphics.Point whose coordinates represent the top left of view when centered inside its parent.

getRotationDegrees

@JvmStatic
public static int getRotationDegrees(@NotNull
                                                android.view.View view)

Computes the rotation of a android.view.View in degrees from its natural orientation.

See Also:

android.view.View

isNaturalPortrait

@JvmStatic
public static boolean isNaturalPortrait(@NotNull
                                                   android.content.Context context,
                                                   int rotationDegrees)

Determines whether the current device is a natural portrait-oriented device

Using the current app's window to determine whether the device is a natural portrait-oriented device doesn't work in all scenarios, one example of this is multi-window mode. Taking a natural portrait-oriented device in multi-window mode, rotating it 90 degrees (so that it's in landscape), with the app open, and its window's width being smaller than its height. Using the app's width and height would determine that the device isn't naturally portrait-oriented, where in fact it is, which is why it is important to use the size of the device instead.

Parameters:

context - Current context. Can be an android.app.Application contextor an android.app.Activity context.

rotationDegrees - The device's rotation in degrees from its natural orientation.

Returns:

Whether the device is naturally portrait-oriented.

rotationDegreesFromSurfaceRotation

@JvmStatic
public static int rotationDegreesFromSurfaceRotation(int rotationConstant)

Get the int value degree of a rotation from the Surface constants.

Valid values for the relative rotation are Surface.ROTATION_0, Surface.ROTATION_90, Surface.ROTATION_180, Surface.ROTATION_270.

See Also:

Surface, Surface.ROTATION_0, Surface.ROTATION_90, Surface.ROTATION_180, Surface.ROTATION_270