mirror of https://github.com/moparisthebest/k-9
231 lines
8.9 KiB
Java
231 lines
8.9 KiB
Java
package com.fsck.k9.activity;
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import java.util.Locale;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.TypedArray;
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import android.os.Bundle;
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import android.util.Log;
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import android.view.GestureDetector;
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import android.view.GestureDetector.SimpleOnGestureListener;
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import android.view.MotionEvent;
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import android.view.animation.AccelerateInterpolator;
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import android.view.animation.Animation;
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import android.view.animation.TranslateAnimation;
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import com.actionbarsherlock.app.SherlockActivity;
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import com.fsck.k9.K9;
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public class K9Activity extends SherlockActivity {
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protected static final int BEZEL_SWIPE_THRESHOLD = 20;
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protected GestureDetector mGestureDetector;
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@Override
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public void onCreate(Bundle icicle) {
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setLanguage(this, K9.getK9Language());
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setTheme(K9.getK9ThemeResourceId());
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super.onCreate(icicle);
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setupFormats();
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}
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public static void setLanguage(Context context, String language) {
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Locale locale;
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if (language == null || language.equals("")) {
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locale = Locale.getDefault();
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} else if (language.length() == 5 && language.charAt(2) == '_') {
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// language is in the form: en_US
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locale = new Locale(language.substring(0, 2), language.substring(3));
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} else {
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locale = new Locale(language);
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}
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Configuration config = new Configuration();
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config.locale = locale;
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context.getResources().updateConfiguration(config,
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context.getResources().getDisplayMetrics());
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}
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@Override
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public boolean dispatchTouchEvent(MotionEvent ev) {
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if (mGestureDetector != null) {
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mGestureDetector.onTouchEvent(ev);
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}
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return super.dispatchTouchEvent(ev);
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}
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@Override
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public void onResume() {
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super.onResume();
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setupFormats();
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}
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private java.text.DateFormat mTimeFormat;
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private void setupFormats() {
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mTimeFormat = android.text.format.DateFormat.getTimeFormat(this); // 12/24 date format
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}
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public java.text.DateFormat getTimeFormat() {
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return mTimeFormat;
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}
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/**
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* Called when a swipe from right to left is handled by {@link MyGestureDetector}. See
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* {@link android.view.GestureDetector.OnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)}
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* for more information on the {@link MotionEvent}s being passed.
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* @param e1 First down motion event that started the fling.
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* @param e2 The move motion event that triggered the current onFling.
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*/
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protected void onSwipeRightToLeft(final MotionEvent e1, final MotionEvent e2) {
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}
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/**
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* Called when a swipe from left to right is handled by {@link MyGestureDetector}. See
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* {@link android.view.GestureDetector.OnGestureListener#onFling(android.view.MotionEvent, android.view.MotionEvent, float, float)}
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* for more information on the {@link MotionEvent}s being passed.
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* @param e1 First down motion event that started the fling.
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* @param e2 The move motion event that triggered the current onFling.
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*/
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protected void onSwipeLeftToRight(final MotionEvent e1, final MotionEvent e2) {
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}
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protected Animation inFromRightAnimation() {
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return slideAnimation(0.0f, +1.0f);
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}
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protected Animation outToLeftAnimation() {
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return slideAnimation(0.0f, -1.0f);
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}
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private Animation slideAnimation(float right, float left) {
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Animation slide = new TranslateAnimation(
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Animation.RELATIVE_TO_PARENT, right, Animation.RELATIVE_TO_PARENT, left,
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Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f
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);
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slide.setDuration(125);
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slide.setFillBefore(true);
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slide.setInterpolator(new AccelerateInterpolator());
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return slide;
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}
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class MyGestureDetector extends SimpleOnGestureListener {
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private boolean gesturesEnabled = false;
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/**
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* Creates a new {@link android.view.GestureDetector.OnGestureListener}. Enabled/disabled based upon
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* {@link com.fsck.k9.K9#gesturesEnabled()}}.
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*/
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public MyGestureDetector() {
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super();
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}
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/**
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* Create a new {@link android.view.GestureDetector.OnGestureListener}.
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* @param gesturesEnabled Setting to <code>true</code> will enable gesture detection,
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* regardless of the system-wide gesture setting.
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*/
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public MyGestureDetector(final boolean gesturesEnabled) {
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super();
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this.gesturesEnabled = gesturesEnabled;
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}
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private static final float SWIPE_MAX_OFF_PATH_DIP = 250f;
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private static final float SWIPE_THRESHOLD_VELOCITY_DIP = 325f;
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protected MotionEvent mLastOnDownEvent = null;
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@Override
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public boolean onDown(MotionEvent e) {
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mLastOnDownEvent = e;
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return super.onDown(e);
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}
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@Override
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public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
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// Do fling-detection if gestures are force-enabled or we have system-wide gestures enabled.
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if (gesturesEnabled || K9.gesturesEnabled()) {
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// Apparently sometimes e1 is null
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// Found a workaround here: http://stackoverflow.com/questions/4151385/
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if (e1 == null) {
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e1 = mLastOnDownEvent;
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}
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// Make sure we avoid NullPointerExceptions
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if (e1 == null || e2 == null) {
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return false;
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}
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// Calculate the minimum distance required for this to count as a swipe.
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// Convert the constant dips to pixels.
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final float mGestureScale = getResources().getDisplayMetrics().density;
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final int minVelocity = (int)(SWIPE_THRESHOLD_VELOCITY_DIP * mGestureScale + 0.5f);
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final int maxOffPath = (int)(SWIPE_MAX_OFF_PATH_DIP * mGestureScale + 0.5f);
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// Calculate how much was actually swiped.
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final float deltaX = e2.getX() - e1.getX();
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final float deltaY = e2.getY() - e1.getY();
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// Calculate the minimum distance required for this to be considered a swipe.
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final int minDistance = (int)Math.abs(deltaY * 4);
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if(K9.DEBUG) {
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final boolean movedAcross = (Math.abs(deltaX) > Math.abs(deltaY * 4));
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final boolean steadyHand = (Math.abs(deltaX / deltaY) > 2);
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Log.d(K9.LOG_TAG, String.format("Old swipe algorithm: movedAcross=%s steadyHand=%s result=%s", movedAcross, steadyHand, movedAcross && steadyHand));
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Log.d(K9.LOG_TAG, String.format("New swipe algorithm: deltaX=%.2f deltaY=%.2f minDistance=%d velocity=%.2f (min=%d)", deltaX, deltaY, minDistance, velocityX, minVelocity));
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}
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try {
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if (Math.abs(deltaY) > maxOffPath) {
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if(K9.DEBUG)
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Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe too far off horizontal path.");
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return false;
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}
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if(Math.abs(velocityX) < minVelocity) {
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if(K9.DEBUG)
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Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe too slow.");
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return false;
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}
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// right to left swipe
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if (deltaX < (minDistance * -1)) {
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onSwipeRightToLeft(e1, e2);
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if(K9.DEBUG)
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Log.d(K9.LOG_TAG, "New swipe algorithm: Right to Left swipe OK.");
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} else if (deltaX > minDistance) {
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onSwipeLeftToRight(e1, e2);
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if(K9.DEBUG)
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Log.d(K9.LOG_TAG, "New swipe algorithm: Left to Right swipe OK.");
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} else {
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if(K9.DEBUG)
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Log.d(K9.LOG_TAG, "New swipe algorithm: Swipe did not meet minimum distance requirements.");
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return false;
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}
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// successful fling, cancel the 2nd event to prevent any other action from happening
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// see http://code.google.com/p/android/issues/detail?id=8497
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e2.setAction(MotionEvent.ACTION_CANCEL);
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} catch (Exception e) {
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// nothing
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}
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}
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return false;
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}
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}
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public int getThemeBackgroundColor() {
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TypedArray array = getTheme().obtainStyledAttributes(new int[] {
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android.R.attr.colorBackground,
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});
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int backgroundColor = array.getColor(0, 0xFF00FF);
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array.recycle();
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return backgroundColor;
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}
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}
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