ScalingUtils.ScaleType
| com.facebook.drawee.drawable.ScalingUtils.ScaleType |
 Known Indirect Subclasses
|
Class Overview
Options for scaling the child bounds to the parent bounds.
Similar to android.widget.ImageView.ScaleType, but ScaleType.MATRIX is not
supported. To use matrix scaling, use a MatrixDrawable. An additional scale type
(FOCUS_CROP) is provided.
Summary
| Fields | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| public static final ScalingUtils.ScaleType | CENTER | Performs no scaling. | |||||||||
| public static final ScalingUtils.ScaleType | CENTER_CROP | Scales the child so that both dimensions will be greater than or equal to the corresponding dimension of the parent. | |||||||||
| public static final ScalingUtils.ScaleType | CENTER_INSIDE | Scales the child so that it fits entirely inside the parent. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_BOTTOM_START | Scales the child so that it fits entirely inside the parent. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_CENTER | Scales the child so that it fits entirely inside the parent. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_END | Scales the child so that it fits entirely inside the parent. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_START | Scales the child so that it fits entirely inside the parent. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_X | Scales the child so that the child's width fits exactly. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_XY | Scales width and height independently, so that the child matches the parent exactly. | |||||||||
| public static final ScalingUtils.ScaleType | FIT_Y | Scales the child so that the child's height fits exactly. | |||||||||
| public static final ScalingUtils.ScaleType | FOCUS_CROP | Scales the child so that both dimensions will be greater than or equal to the corresponding dimension of the parent. | |||||||||
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| abstract Matrix |
getTransform(Matrix outTransform, Rect parentBounds, int childWidth, int childHeight, float focusX, float focusY)
Gets transformation matrix based on the scale type.
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Fields
public static final ScalingUtils.ScaleType CENTER
Performs no scaling. Child is centered within parent's bounds.
public static final ScalingUtils.ScaleType CENTER_CROP
Scales the child so that both dimensions will be greater than or equal to the corresponding dimension of the parent. At least one dimension (width or height) will fit exactly. Child is centered within parent's bounds.
public static final ScalingUtils.ScaleType CENTER_INSIDE
Scales the child so that it fits entirely inside the parent. Unlike FIT_CENTER, if the child is smaller, no up-scaling will be performed. Aspect ratio is preserved. Child is centered within parent's bounds.
public static final ScalingUtils.ScaleType FIT_BOTTOM_START
Scales the child so that it fits entirely inside the parent. At least one dimension (width or height) will fit exactly. Aspect ratio is preserved. Child is aligned to the bottom-left corner of the parent.
public static final ScalingUtils.ScaleType FIT_CENTER
Scales the child so that it fits entirely inside the parent. At least one dimension (width or height) will fit exactly. Aspect ratio is preserved. Child is centered within the parent's bounds.
public static final ScalingUtils.ScaleType FIT_END
Scales the child so that it fits entirely inside the parent. At least one dimension (width or height) will fit exactly. Aspect ratio is preserved. Child is aligned to the bottom-right corner of the parent.
public static final ScalingUtils.ScaleType FIT_START
Scales the child so that it fits entirely inside the parent. At least one dimension (width or height) will fit exactly. Aspect ratio is preserved. Child is aligned to the top-left corner of the parent.
public static final ScalingUtils.ScaleType FIT_X
Scales the child so that the child's width fits exactly. The height will be cropped if it exceeds parent's bounds. Aspect ratio is preserved. Child is centered within the parent's bounds.
public static final ScalingUtils.ScaleType FIT_XY
Scales width and height independently, so that the child matches the parent exactly. This may change the aspect ratio of the child.
public static final ScalingUtils.ScaleType FIT_Y
Scales the child so that the child's height fits exactly. The width will be cropped if it exceeds parent's bounds. Aspect ratio is preserved. Child is centered within the parent's bounds.
public static final ScalingUtils.ScaleType FOCUS_CROP
Scales the child so that both dimensions will be greater than or equal to the corresponding dimension of the parent. At least one dimension (width or height) will fit exactly. The child's focus point will be centered within the parent's bounds as much as possible without leaving empty space. It is guaranteed that the focus point will be visible and centered as much as possible. If the focus point is set to (0.5f, 0.5f), result will be equivalent to CENTER_CROP.
Public Methods
public abstract Matrix getTransform (Matrix outTransform, Rect parentBounds, int childWidth, int childHeight, float focusX, float focusY)
Gets transformation matrix based on the scale type.
Parameters
| outTransform | out matrix to store result |
|---|---|
| parentBounds | parent bounds |
| childWidth | child width |
| childHeight | child height |
| focusX | focus point x coordinate, relative [0...1] |
| focusY | focus point y coordinate, relative [0...1] |
Returns
- same reference to the out matrix for convenience