forked from upstream-mirrors/OpenTracks
Merging changes from realtime branch into mainline.
This commit is contained in:
Sandor Dornbush
@@ -0,0 +1,220 @@
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/*
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* Copyright 2008 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.google.android.apps.mytracks;
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import com.google.android.maps.mytracks.R;
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import android.content.Context;
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import android.graphics.drawable.Drawable;
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import android.os.Handler;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.animation.AlphaAnimation;
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import android.view.animation.Animation;
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import android.widget.ImageView;
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import android.widget.RelativeLayout;
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import android.widget.RelativeLayout.LayoutParams;
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/**
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* Creates previous and next arrows for a given activity.
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*
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* @author Leif Hendrik Wilden
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*/
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public class NavControls {
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private static final int KEEP_VISIBLE_MILLIS = 4000;
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private static final boolean FADE_CONTROLS = true;
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private static final Animation SHOW_NEXT_ANIMATION =
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new AlphaAnimation(0F, 1F);
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private static final Animation HIDE_NEXT_ANIMATION =
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new AlphaAnimation(1F, 0F);
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private static final Animation SHOW_PREV_ANIMATION =
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new AlphaAnimation(0F, 1F);
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private static final Animation HIDE_PREV_ANIMATION =
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new AlphaAnimation(1F, 0F);
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/**
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* A touchable image view.
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*/
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public class TouchLayout extends RelativeLayout {
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private final ImageView arrow;
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private final ImageView icon;
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public TouchLayout(Context context, boolean isLeft) {
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super(context);
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arrow = new ImageView(context);
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arrow.setImageDrawable(context.getResources().getDrawable(
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isLeft ? R.drawable.btn_arrow_left : R.drawable.btn_arrow_right));
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icon = new ImageView(context);
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icon.setVisibility(View.GONE);
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addView(arrow);
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addView(icon);
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icon.setPadding((isLeft ? 15 : 10), 27, 15, 0);
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}
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public void setIcon(Drawable drawable) {
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icon.setImageDrawable(drawable);
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icon.setVisibility(View.VISIBLE);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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switch (event.getAction()) {
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case MotionEvent.ACTION_DOWN:
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setPressed(true);
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hide();
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if (this == prevImage) {
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if (prevRunnable != null) {
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handler.post(prevRunnable);
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return true;
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}
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} else if (this == nextImage) {
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if (nextRunnable != null) {
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handler.post(nextRunnable);
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return true;
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}
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}
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break;
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case MotionEvent.ACTION_UP:
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setPressed(false);
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break;
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}
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return super.onTouchEvent(event);
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}
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}
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private final Context context;
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private final Runnable prevRunnable;
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private final Runnable nextRunnable;
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private final Handler handler = new Handler();
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private final Runnable dismissControls = new Runnable() {
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public void run() {
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hide();
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}
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};
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private final TouchLayout prevImage;
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private final TouchLayout nextImage;
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private boolean isVisible = false;
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private boolean hasNext = true;
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private boolean hasPrev = true;
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public NavControls(Context context, ViewGroup container,
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Runnable prevRunnable, Runnable nextRunnable) {
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this.context = context;
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this.prevRunnable = prevRunnable;
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this.nextRunnable = nextRunnable;
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LayoutParams prevParams = new LayoutParams(
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LayoutParams.WRAP_CONTENT,
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LayoutParams.WRAP_CONTENT);
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prevParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
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prevParams.addRule(RelativeLayout.CENTER_VERTICAL);
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prevImage = new TouchLayout(context, true);
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prevImage.setLayoutParams(prevParams);
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prevImage.setVisibility(View.INVISIBLE);
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container.addView(prevImage);
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LayoutParams nextParams = new LayoutParams(
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LayoutParams.WRAP_CONTENT,
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LayoutParams.WRAP_CONTENT);
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nextParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
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nextParams.addRule(RelativeLayout.CENTER_VERTICAL);
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nextImage = new TouchLayout(context, false);
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nextImage.setLayoutParams(nextParams);
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nextImage.setVisibility(View.INVISIBLE);
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container.addView(nextImage);
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}
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public void setHasNext(boolean hasNext) {
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this.hasNext = hasNext;
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}
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public void setHasPrev(boolean hasPrev) {
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this.hasPrev = hasPrev;
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}
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private void keepVisible() {
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if (isVisible && FADE_CONTROLS) {
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handler.removeCallbacks(dismissControls);
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handler.postDelayed(dismissControls, KEEP_VISIBLE_MILLIS);
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}
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}
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public void show() {
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if (!isVisible) {
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if (prevRunnable != null && hasPrev) {
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SHOW_PREV_ANIMATION.setDuration(500);
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SHOW_PREV_ANIMATION.startNow();
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prevImage.setPressed(false);
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prevImage.setAnimation(SHOW_PREV_ANIMATION);
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prevImage.setVisibility(View.VISIBLE);
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}
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if (nextRunnable != null && hasNext) {
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SHOW_NEXT_ANIMATION.setDuration(500);
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SHOW_NEXT_ANIMATION.startNow();
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nextImage.setPressed(false);
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nextImage.setAnimation(SHOW_NEXT_ANIMATION);
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nextImage.setVisibility(View.VISIBLE);
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}
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isVisible = true;
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keepVisible();
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} else {
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keepVisible();
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}
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}
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public void hideNow() {
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handler.removeCallbacks(dismissControls);
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isVisible = false;
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prevImage.clearAnimation();
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prevImage.setVisibility(View.INVISIBLE);
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nextImage.clearAnimation();
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nextImage.setVisibility(View.INVISIBLE);
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}
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public void hide() {
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isVisible = false;
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if (prevRunnable != null) {
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if (hasPrev) {
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prevImage.setAnimation(HIDE_PREV_ANIMATION);
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HIDE_PREV_ANIMATION.setDuration(500);
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HIDE_PREV_ANIMATION.startNow();
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} else {
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prevImage.clearAnimation();
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}
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prevImage.setVisibility(View.INVISIBLE);
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}
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if (nextRunnable != null) {
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if (hasNext) {
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nextImage.setAnimation(HIDE_NEXT_ANIMATION);
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HIDE_NEXT_ANIMATION.setDuration(500);
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HIDE_NEXT_ANIMATION.startNow();
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} else {
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nextImage.clearAnimation();
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}
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nextImage.setVisibility(View.INVISIBLE);
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}
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}
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public void setLeftIcon(int resourceId) {
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prevImage.setIcon(context.getResources().getDrawable(resourceId));
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}
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public void setRightIcon(int resourceId) {
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nextImage.setIcon(context.getResources().getDrawable(resourceId));
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}
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}
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