110 lines
5.8 KiB
Java
110 lines
5.8 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.keyboard.internal;
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import android.content.res.TypedArray;
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import com.android.inputmethod.latin.R;
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import com.android.inputmethod.latin.utils.ResourceUtils;
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/**
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* This class holds parameters to control how a gesture stroke is sampled and recognized.
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* This class also has parameters to distinguish gesture input events from fast typing events.
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*
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* @attr ref R.styleable#MainKeyboardView_gestureStaticTimeThresholdAfterFastTyping
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* @attr ref R.styleable#MainKeyboardView_gestureDetectFastMoveSpeedThreshold
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* @attr ref R.styleable#MainKeyboardView_gestureDynamicThresholdDecayDuration
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* @attr ref R.styleable#MainKeyboardView_gestureDynamicTimeThresholdFrom
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* @attr ref R.styleable#MainKeyboardView_gestureDynamicTimeThresholdTo
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* @attr ref R.styleable#MainKeyboardView_gestureDynamicDistanceThresholdFrom
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* @attr ref R.styleable#MainKeyboardView_gestureDynamicDistanceThresholdTo
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* @attr ref R.styleable#MainKeyboardView_gestureSamplingMinimumDistance
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* @attr ref R.styleable#MainKeyboardView_gestureRecognitionMinimumTime
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* @attr ref R.styleable#MainKeyboardView_gestureRecognitionSpeedThreshold
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*/
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public final class GestureStrokeRecognitionParams {
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// Static threshold for gesture after fast typing
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public final int mStaticTimeThresholdAfterFastTyping; // msec
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// Static threshold for starting gesture detection
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public final float mDetectFastMoveSpeedThreshold; // keyWidth/sec
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// Dynamic threshold for gesture after fast typing
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public final int mDynamicThresholdDecayDuration; // msec
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// Time based threshold values
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public final int mDynamicTimeThresholdFrom; // msec
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public final int mDynamicTimeThresholdTo; // msec
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// Distance based threshold values
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public final float mDynamicDistanceThresholdFrom; // keyWidth
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public final float mDynamicDistanceThresholdTo; // keyWidth
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// Parameters for gesture sampling
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public final float mSamplingMinimumDistance; // keyWidth
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// Parameters for gesture recognition
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public final int mRecognitionMinimumTime; // msec
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public final float mRecognitionSpeedThreshold; // keyWidth/sec
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// Default GestureStrokeRecognitionPoints parameters.
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public static final GestureStrokeRecognitionParams DEFAULT =
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new GestureStrokeRecognitionParams();
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private GestureStrokeRecognitionParams() {
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// These parameter values are default and intended for testing.
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mStaticTimeThresholdAfterFastTyping = 350; // msec
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mDetectFastMoveSpeedThreshold = 1.5f; // keyWidth/sec
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mDynamicThresholdDecayDuration = 450; // msec
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mDynamicTimeThresholdFrom = 300; // msec
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mDynamicTimeThresholdTo = 20; // msec
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mDynamicDistanceThresholdFrom = 6.0f; // keyWidth
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mDynamicDistanceThresholdTo = 0.35f; // keyWidth
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// The following parameters' change will affect the result of regression test.
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mSamplingMinimumDistance = 1.0f / 6.0f; // keyWidth
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mRecognitionMinimumTime = 100; // msec
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mRecognitionSpeedThreshold = 5.5f; // keyWidth/sec
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}
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public GestureStrokeRecognitionParams(final TypedArray mainKeyboardViewAttr) {
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mStaticTimeThresholdAfterFastTyping = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_gestureStaticTimeThresholdAfterFastTyping,
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DEFAULT.mStaticTimeThresholdAfterFastTyping);
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mDetectFastMoveSpeedThreshold = ResourceUtils.getFraction(mainKeyboardViewAttr,
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R.styleable.MainKeyboardView_gestureDetectFastMoveSpeedThreshold,
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DEFAULT.mDetectFastMoveSpeedThreshold);
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mDynamicThresholdDecayDuration = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_gestureDynamicThresholdDecayDuration,
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DEFAULT.mDynamicThresholdDecayDuration);
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mDynamicTimeThresholdFrom = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_gestureDynamicTimeThresholdFrom,
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DEFAULT.mDynamicTimeThresholdFrom);
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mDynamicTimeThresholdTo = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_gestureDynamicTimeThresholdTo,
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DEFAULT.mDynamicTimeThresholdTo);
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mDynamicDistanceThresholdFrom = ResourceUtils.getFraction(mainKeyboardViewAttr,
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R.styleable.MainKeyboardView_gestureDynamicDistanceThresholdFrom,
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DEFAULT.mDynamicDistanceThresholdFrom);
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mDynamicDistanceThresholdTo = ResourceUtils.getFraction(mainKeyboardViewAttr,
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R.styleable.MainKeyboardView_gestureDynamicDistanceThresholdTo,
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DEFAULT.mDynamicDistanceThresholdTo);
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mSamplingMinimumDistance = ResourceUtils.getFraction(mainKeyboardViewAttr,
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R.styleable.MainKeyboardView_gestureSamplingMinimumDistance,
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DEFAULT.mSamplingMinimumDistance);
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mRecognitionMinimumTime = mainKeyboardViewAttr.getInt(
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R.styleable.MainKeyboardView_gestureRecognitionMinimumTime,
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DEFAULT.mRecognitionMinimumTime);
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mRecognitionSpeedThreshold = ResourceUtils.getFraction(mainKeyboardViewAttr,
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R.styleable.MainKeyboardView_gestureRecognitionSpeedThreshold,
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DEFAULT.mRecognitionSpeedThreshold);
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}
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}
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