com.androidpi.literefresh.behavior

Class VerticalIndicatorBehavior<V extends android.view.View,CTR extends VerticalIndicatorBehaviorController>

java.lang.Object

<any>

com.androidpi.literefresh.behavior.ViewOffsetBehavior<V>

com.androidpi.literefresh.behavior.AnimationOffsetBehavior<V,CTR>

com.androidpi.literefresh.behavior.VerticalIndicatorBehavior<V,CTR>

All Implemented Interfaces:

android.os.Handler.Callback

Direct Known Subclasses:

RefreshFooterBehavior, RefreshHeaderBehavior

public abstract class VerticalIndicatorBehavior<V extends android.view.View,CTR extends VerticalIndicatorBehaviorController>
extends AnimationOffsetBehavior<V,CTR>

Super class of header and footer behavior.

The header and footer behaviors are almost the same, the primary difference is that they have different coordinate system when we trace the bottom and top position of the view to which they attached respectively.

As we have record the bottom and top offset of the view within the view's default coordinate system, whose original point is the left top point of the parent view.

Now we need to trace how much the header has scroll from the top of the parent view. We need to transform the bottom position of the header view from coordinate system of the parent view to another one. This would be a affine matrix transformation below:

      |1 0 height||x|   |         x|
      |0 1 height||y| = |y + height|
      |0 0      1||1|   |         1|
 

We also need to trace how much the footer view has scrolled from the bottom of the parent view, we use top position of the view as the traced position, the coordinate system would be a affine transformation below:

      |1   0              0||x|   |                x|
      |0   -1  parentHeight||y| = |-y + parentHeight|
      |0   0              1||1|   |                1|
 

Nested Class Summary

Nested classes/interfaces inherited from class com.androidpi.literefresh.behavior.AnimationOffsetBehavior

AnimationOffsetBehavior.ScrollingListener

Field Summary

Fields inherited from class com.androidpi.literefresh.behavior.AnimationOffsetBehavior

configuration, controller, GOLDEN_RATIO, handler, mChild, mListeners, mParent, progressBase, TYPE_UNKNOWN

Constructor Summary

Constructors

Constructor and Description
VerticalIndicatorBehavior(android.content.Context context)
VerticalIndicatorBehavior(android.content.Context context, android.util.AttributeSet attrs)

Method Summary

Modifier and Type	Method and Description
protected ScrollingContentBehavior	getContentBehavior(CoordinatorLayout parent, android.view.View child)
protected abstract int	getInitialOffset(CoordinatorLayout parent, android.view.View child)
protected abstract int	getMaxOffset(CoordinatorLayout parent, android.view.View child)
protected abstract int	getMinOffset(CoordinatorLayout parent, android.view.View child)
protected abstract int	getRefreshTriggerOffset(CoordinatorLayout parent, android.view.View child)
boolean	layoutDependsOn(CoordinatorLayout parent, V child, android.view.View dependency)
boolean	onDependentViewChanged(CoordinatorLayout parent, V child, android.view.View dependency)
boolean	onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection)
boolean	onMeasureChild(CoordinatorLayout parent, V child, int parentWidthMeasureSpec, int widthUsed, int parentHeightMeasureSpec, int heightUsed)
boolean	onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, android.view.View directTargetChild, android.view.View target, int axes, int type)
void	onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, android.view.View target, int type)

Methods inherited from class com.androidpi.literefresh.behavior.AnimationOffsetBehavior

addScrollListener, animateOffsetDeltaWithDuration, animateOffsetWithDuration, cancelAnimation, enqueuePendingActions, executePendingActions, getChild, getConfiguration, getController, getParent, handleMessage, onAttachedToLayoutParams, onDetachedFromLayoutParams, removeScrollListener, requestLayout, runOnUiThread, runWithView, setConfiguration

Methods inherited from class com.androidpi.literefresh.behavior.ViewOffsetBehavior

getLeftAndRightOffset, getTopAndBottomOffset, layoutChild, setLeftAndRightOffset, setTopAndBottomOffset

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VerticalIndicatorBehavior

public VerticalIndicatorBehavior(android.content.Context context)

VerticalIndicatorBehavior

public VerticalIndicatorBehavior(android.content.Context context,
                                 android.util.AttributeSet attrs)

Method Detail

onMeasureChild

public boolean onMeasureChild(CoordinatorLayout parent,
                              V child,
                              int parentWidthMeasureSpec,
                              int widthUsed,
                              int parentHeightMeasureSpec,
                              int heightUsed)

Overrides:

onMeasureChild in class AnimationOffsetBehavior<V extends android.view.View,CTR extends VerticalIndicatorBehaviorController>

onLayoutChild

public boolean onLayoutChild(CoordinatorLayout parent,
                             V child,
                             int layoutDirection)

Overrides:

onLayoutChild in class AnimationOffsetBehavior<V extends android.view.View,CTR extends VerticalIndicatorBehaviorController>

onStartNestedScroll

public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout,
                                   V child,
                                   android.view.View directTargetChild,
                                   android.view.View target,
                                   int axes,
                                   int type)

onStopNestedScroll

public void onStopNestedScroll(CoordinatorLayout coordinatorLayout,
                               V child,
                               android.view.View target,
                               int type)

layoutDependsOn

public boolean layoutDependsOn(CoordinatorLayout parent,
                               V child,
                               android.view.View dependency)

onDependentViewChanged

public boolean onDependentViewChanged(CoordinatorLayout parent,
                                      V child,
                                      android.view.View dependency)

getContentBehavior

protected ScrollingContentBehavior getContentBehavior(CoordinatorLayout parent,
                                                      android.view.View child)

getInitialOffset

protected abstract int getInitialOffset(CoordinatorLayout parent,
                                        android.view.View child)

getRefreshTriggerOffset

protected abstract int getRefreshTriggerOffset(CoordinatorLayout parent,
                                               android.view.View child)

getMinOffset

protected abstract int getMinOffset(CoordinatorLayout parent,
                                    android.view.View child)

getMaxOffset

protected abstract int getMaxOffset(CoordinatorLayout parent,
                                    android.view.View child)