/**
* Close the custom view applying an animation to close the view to the left side of the screen.
*/
public void closeToLeft() {
if (viewDragHelper.smoothSlideViewTo(
dragView,
-transformer.getOriginalWidth(),
getHeight() - transformer.getMinHeightPlusMargin())) {
ViewCompat.postInvalidateOnAnimation(this);
notifyCloseToLeftListener();
}
}
/** Override method to configure the dragged view and secondView layout properly. */
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (isInEditMode()) super.onLayout(changed, left, top, right, bottom);
else if (isDragViewAtTop()) {
dragView.layout(left, top, right, transformer.getOriginalHeight());
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
ViewHelper.setY(dragView, top);
ViewHelper.setY(secondView, transformer.getOriginalHeight());
} else {
secondView.layout(left, transformer.getOriginalHeight(), right, bottom);
}
}
/**
* Realize an smooth slide to an slide offset passed as argument. This method is the base of
* maximize, minimize and close methods.
*
* @param slideOffset to apply
* @return true if the view is slided.
*/
private boolean smoothSlideTo(float slideOffset) {
final int topBound = getPaddingTop();
int x = (int) (slideOffset * (getWidth() - transformer.getMinWidthPlusMarginRight()));
int y = (int) (topBound + slideOffset * getVerticalDragRange());
if (viewDragHelper.smoothSlideViewTo(dragView, x, y)) {
ViewCompat.postInvalidateOnAnimation(this);
return true;
}
return false;
}
/** Initialize Transformer with a scalable or change width/height implementation. */
private void initializeTransformer(TypedArray attributes) {
topViewResize =
attributes.getBoolean(R.styleable.draggable_view_top_view_resize, DEFAULT_TOP_VIEW_RESIZE);
TransformerFactory transformerFactory = new TransformerFactory();
transformer = transformerFactory.getTransformer(topViewResize, dragView, this);
transformer.setViewHeight(
attributes.getDimensionPixelSize(
R.styleable.draggable_view_top_view_height, DEFAULT_TOP_VIEW_HEIGHT));
transformer.setXScaleFactor(
attributes.getFloat(
R.styleable.draggable_view_top_view_x_scale_factor, DEFAULT_SCALE_FACTOR));
transformer.setYScaleFactor(
attributes.getFloat(
R.styleable.draggable_view_top_view_y_scale_factor, DEFAULT_SCALE_FACTOR));
transformer.setMarginRight(
attributes.getDimensionPixelSize(
R.styleable.draggable_view_top_view_margin_right, DEFAULT_TOP_VIEW_MARGIN));
transformer.setMarginBottom(
attributes.getDimensionPixelSize(
R.styleable.draggable_view_top_view_margin_bottom, DEFAULT_TOP_VIEW_MARGIN));
}
/**
* Check if dragged view is at the bottom of the custom view.
*
* @return true if dragged view bottom position is equals to custom view height.
*/
boolean isDragViewAtBottom() {
return transformer.isViewAtBottom();
}
/**
* Check if dragged view is at the right of the custom view.
*
* @return true if dragged view right position is equals to custom view width.
*/
boolean isDragViewAtRight() {
return transformer.isViewAtRight();
}
/** Configure the dragView margin bottom applied when the dragView is minimized. */
public void setTopViewMarginBottom(int topFragmentMarginBottom) {
transformer.setMarginBottom(topFragmentMarginBottom);
}
/**
* Configure the horizontal scale factor applied when the view is dragged to the bottom of the
* custom view.
*/
public void setXTopViewScaleFactor(float xScaleFactor) {
transformer.setXScaleFactor(xScaleFactor);
}
/**
* Calculate the vertical drag range between the custom view and dragged view.
*
* @return the difference between the custom view height and the dragged view height.
*/
private float getVerticalDragRange() {
return getHeight() - transformer.getMinHeightPlusMargin();
}
/**
* Check if dragged view is above the middle of the custom view.
*
* @return true if dragged view is above the middle of the custom view or false if is below.
*/
boolean isDragViewAboveTheMiddle() {
return transformer.isAboveTheMiddle();
}
/** Modify dragged view scale based on the dragged view vertical position and the scale factor. */
void changeDragViewScale() {
transformer.updateScale(getVerticalDragOffset());
}
/**
* Modify dragged view pivot based on the dragged view vertical position to simulate a horizontal
* displacement while the view is dragged.
*/
void changeDragViewPosition() {
transformer.updatePosition(getVerticalDragOffset());
}
/**
* Configure the dragged view height.
*
* @param topFragmentHeight in pixels
*/
public void setTopViewHeight(int topFragmentHeight) {
transformer.setViewHeight(topFragmentHeight);
}
/** @return configured dragged view margin right configured. */
private int getDragViewMarginRight() {
return transformer.getMarginRight();
}
/**
* Check if dragged view is next to the left bound.
*
* @return true if dragged view right position is behind the right half of the custom view.
*/
boolean isNextToLeftBound() {
return transformer.isNextToLeftBound();
}
/** @return configured dragged view margin bottom. */
private int getDragViewMarginBottom() {
return transformer.getMarginBottom();
}
/**
* Check if dragged view is next to the right bound.
*
* @return true if dragged view left position is behind the left quarter of the custom view.
*/
boolean isNextToRightBound() {
return transformer.isNextToRightBound();
}
public int getDraggedViewHeightPlusMarginTop() {
return transformer.getMinHeightPlusMargin();
}
/**
* Check if dragged view is at the top of the custom view.
*
* @return true if dragged view top position is equals to zero.
*/
boolean isDragViewAtTop() {
return transformer.isViewAtTop();
}
/**
* Configure the vertical scale factor applied when the view is dragged to the bottom of the
* custom view.
*/
public void setYTopViewScaleFactor(float yScaleFactor) {
transformer.setYScaleFactor(yScaleFactor);
}
/**
* Configure the dragged view margin right applied when the dragged view is minimized.
*
* @param topFragmentMarginRight in pixels.
*/
public void setTopViewMarginRight(int topFragmentMarginRight) {
transformer.setMarginRight(topFragmentMarginRight);
}