package com.lcjian.library.widget;
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import android.content.res.Resources;
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import android.util.TypedValue;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.ViewGroup.LayoutParams;
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import android.view.ViewParent;
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import android.view.animation.AccelerateInterpolator;
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import android.view.animation.AlphaAnimation;
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import android.view.animation.Animation;
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import android.view.animation.DecelerateInterpolator;
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import android.widget.FrameLayout;
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import android.widget.ProgressBar;
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/**
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* A simple text label view that can be applied as a "refresh" to any given {@link android.view.View}.
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* This class is intended to be instantiated at runtime rather than included in XML layouts.
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*
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* @author LCJIAN
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*/
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public class RefreshView {
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public static final int POSITION_TOP_LEFT = 1;
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public static final int POSITION_TOP_RIGHT = 2;
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public static final int POSITION_BOTTOM_LEFT = 3;
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public static final int POSITION_BOTTOM_RIGHT = 4;
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public static final int POSITION_CENTER = 5;
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private static final int DEFAULT_MARGIN_DIP = 5;
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private static final int DEFAULT_POSITION = POSITION_CENTER;
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private static Animation fadeIn;
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private static Animation fadeOut;
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private View refresh;
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private View target;
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private int refreshPosition;
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private int refreshMarginH;
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private int refreshMarginV;
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public RefreshView(View target) {
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init(new ProgressBar(target.getContext()), target);
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}
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public RefreshView(View refresh, View target) {
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init(refresh, target);
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}
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private void init(View refresh, View target) {
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this.refresh = refresh;
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this.target = target;
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// apply defaults
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refreshPosition = DEFAULT_POSITION;
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refreshMarginH = dipToPixels(DEFAULT_MARGIN_DIP);
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refreshMarginV = refreshMarginH;
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fadeIn = new AlphaAnimation(0, 1);
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fadeIn.setInterpolator(new DecelerateInterpolator());
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fadeIn.setDuration(200);
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fadeOut = new AlphaAnimation(1, 0);
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fadeOut.setInterpolator(new AccelerateInterpolator());
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fadeOut.setDuration(200);
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if (this.target != null) {
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applyTo(this.target);
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} else {
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show();
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}
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}
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private void applyTo(View target) {
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LayoutParams lp = target.getLayoutParams();
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ViewParent parent = target.getParent();
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FrameLayout container = new FrameLayout(target.getContext());
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ViewGroup group = (ViewGroup) parent;
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int index = group.indexOfChild(target);
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group.removeView(target);
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group.addView(container, index, lp);
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container.addView(target);
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refresh.setVisibility(View.GONE);
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container.addView(refresh);
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group.invalidate();
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}
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/**
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* Make the refresh visible in the UI.
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*
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*/
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public void show() {
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show(false, null);
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}
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/**
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* Make the refresh visible in the UI.
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*
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* @param animate flag to apply the default fade-in animation.
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*/
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public void show(boolean animate) {
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show(animate, fadeIn);
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}
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/**
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* Make the refresh visible in the UI.
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*
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* @param anim Animation to apply to the view when made visible.
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*/
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public void show(Animation anim) {
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show(true, anim);
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}
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/**
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* Make the refresh non-visible in the UI.
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*
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*/
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public void hide() {
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hide(false, null);
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}
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/**
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* Make the refresh non-visible in the UI.
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*
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* @param animate flag to apply the default fade-out animation.
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*/
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public void hide(boolean animate) {
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hide(animate, fadeOut);
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}
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/**
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* Make the refresh non-visible in the UI.
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*
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* @param anim Animation to apply to the view when made non-visible.
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*/
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public void hide(Animation anim) {
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hide(true, anim);
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}
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/**
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* Toggle the refresh visibility in the UI.
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*
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*/
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public void toggle() {
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toggle(false, null, null);
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}
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/**
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* Toggle the refresh visibility in the UI.
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*
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* @param animate flag to apply the default fade-in/out animation.
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*/
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public void toggle(boolean animate) {
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toggle(animate, fadeIn, fadeOut);
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}
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/**
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* Toggle the refresh visibility in the UI.
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*
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* @param animIn Animation to apply to the view when made visible.
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* @param animOut Animation to apply to the view when made non-visible.
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*/
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public void toggle(Animation animIn, Animation animOut) {
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toggle(true, animIn, animOut);
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}
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private void show(boolean animate, Animation anim) {
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applyLayoutParams();
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if (animate) {
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refresh.startAnimation(anim);
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}
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refresh.setVisibility(View.VISIBLE);
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}
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private void hide(boolean animate, Animation anim) {
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refresh.setVisibility(View.GONE);
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if (animate) {
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refresh.startAnimation(anim);
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}
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}
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private void toggle(boolean animate, Animation animIn, Animation animOut) {
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if (refresh.isShown()) {
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hide(animate && (animOut != null), animOut);
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} else {
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show(animate && (animIn != null), animIn);
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}
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}
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private void applyLayoutParams() {
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FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
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switch (refreshPosition) {
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case POSITION_TOP_LEFT:
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lp.gravity = Gravity.LEFT | Gravity.TOP;
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lp.setMargins(refreshMarginH, refreshMarginV, 0, 0);
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break;
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case POSITION_TOP_RIGHT:
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lp.gravity = Gravity.RIGHT | Gravity.TOP;
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lp.setMargins(0, refreshMarginV, refreshMarginH, 0);
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break;
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case POSITION_BOTTOM_LEFT:
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lp.gravity = Gravity.LEFT | Gravity.BOTTOM;
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lp.setMargins(refreshMarginH, 0, 0, refreshMarginV);
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break;
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case POSITION_BOTTOM_RIGHT:
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lp.gravity = Gravity.RIGHT | Gravity.BOTTOM;
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lp.setMargins(0, 0, refreshMarginH, refreshMarginV);
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break;
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case POSITION_CENTER:
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lp.gravity = Gravity.CENTER;
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lp.setMargins(0, 0, 0, 0);
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break;
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default:
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break;
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}
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refresh.setLayoutParams(lp);
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}
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/**
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* Returns the target View this refresh has been attached to.
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*
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*/
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public View getTarget() {
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return target;
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}
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/**
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* Is this refresh currently visible in the UI?
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*
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*/
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public boolean isShown() {
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return refresh.isShown();
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}
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/**
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* Returns the positioning of this refresh.
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*
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* one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
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*
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*/
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public int getBadgePosition() {
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return refreshPosition;
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}
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/**
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* Set the positioning of this refresh.
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*
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* @param layoutPosition one of POSITION_TOP_LEFT, POSITION_TOP_RIGHT, POSITION_BOTTOM_LEFT, POSITION_BOTTOM_RIGHT, POSTION_CENTER.
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*
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*/
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public void setBadgePosition(int layoutPosition) {
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this.refreshPosition = layoutPosition;
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}
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/**
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* Returns the horizontal margin from the target View that is applied to this refresh.
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*
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*/
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public int getHorizontalBadgeMargin() {
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return refreshMarginH;
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}
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/**
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* Returns the vertical margin from the target View that is applied to this refresh.
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*
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*/
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public int getVerticalBadgeMargin() {
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return refreshMarginV;
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}
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/**
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* Set the horizontal/vertical margin from the target View that is applied to this refresh.
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*
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* @param refreshMargin the margin in pixels.
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*/
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public void setBadgeMargin(int refreshMargin) {
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this.refreshMarginH = refreshMargin;
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this.refreshMarginV = refreshMargin;
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}
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/**
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* Set the horizontal/vertical margin from the target View that is applied to this refresh.
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*
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* @param horizontal margin in pixels.
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* @param vertical margin in pixels.
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*/
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public void setBadgeMargin(int horizontal, int vertical) {
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this.refreshMarginH = horizontal;
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this.refreshMarginV = vertical;
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}
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private int dipToPixels(int dip) {
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Resources r = target.getResources();
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float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, r.getDisplayMetrics());
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return (int) px;
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}
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}
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