Example usage for android.support.v4.widget EdgeEffectCompat draw

Introduction

In this page you can find the example usage for android.support.v4.widget EdgeEffectCompat draw.

Prototype

public boolean draw(Canvas canvas) 

Source Link

Document

Draw into the provided canvas.

Usage

From source file:com.github.shareme.gwsmaterialuikit.library.advancerv.draggable.BaseEdgeEffectDecorator.java

private static boolean drawGlow(Canvas c, RecyclerView parent, int dir, EdgeEffectCompat edge) {
    if (edge.isFinished()) {
        return false;
    }//  ww  w . j a v  a  2s  .co m

    final int restore = c.save();
    final boolean clipToPadding = getClipToPadding(parent);

    switch (dir) {
    case EDGE_TOP:
        if (clipToPadding) {
            c.translate(parent.getPaddingLeft(), parent.getPaddingTop());
        }
        break;
    case EDGE_BOTTOM:
        c.rotate(180);
        if (clipToPadding) {
            c.translate(-parent.getWidth() + parent.getPaddingRight(),
                    -parent.getHeight() + parent.getPaddingBottom());
        } else {
            c.translate(-parent.getWidth(), -parent.getHeight());
        }
        break;
    case EDGE_LEFT:
        c.rotate(-90);
        if (clipToPadding) {
            c.translate(-parent.getHeight() + parent.getPaddingTop(), parent.getPaddingLeft());
        } else {
            c.translate(-parent.getHeight(), 0);
        }
        break;
    case EDGE_RIGHT:
        c.rotate(90);
        if (clipToPadding) {
            c.translate(parent.getPaddingTop(), -parent.getWidth() + parent.getPaddingRight());
        } else {
            c.translate(0, -parent.getWidth());
        }
        break;
    }

    boolean needsInvalidate = edge.draw(c);

    c.restoreToCount(restore);

    return needsInvalidate;
}

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