1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.inputmethod.latin; 18 19 import android.app.AlertDialog; 20 import android.content.Context; 21 import android.content.DialogInterface; 22 import android.content.res.TypedArray; 23 import android.preference.DialogPreference; 24 import android.util.AttributeSet; 25 import android.view.View; 26 import android.widget.SeekBar; 27 import android.widget.TextView; 28 29 public final class SeekBarDialogPreference extends DialogPreference 30 implements SeekBar.OnSeekBarChangeListener { 31 public interface ValueProxy { readValue(final String key)32 public int readValue(final String key); readDefaultValue(final String key)33 public int readDefaultValue(final String key); writeValue(final int value, final String key)34 public void writeValue(final int value, final String key); feedbackValue(final int value)35 public void feedbackValue(final int value); 36 } 37 38 private final int mValueFormatResId; 39 private final int mMaxValue; 40 private final int mMinValue; 41 private final int mStepValue; 42 43 private TextView mValueView; 44 private SeekBar mSeekBar; 45 46 private ValueProxy mValueProxy; 47 SeekBarDialogPreference(final Context context, final AttributeSet attrs)48 public SeekBarDialogPreference(final Context context, final AttributeSet attrs) { 49 super(context, attrs); 50 final TypedArray a = context.obtainStyledAttributes( 51 attrs, R.styleable.SeekBarDialogPreference, 0, 0); 52 mValueFormatResId = a.getResourceId(R.styleable.SeekBarDialogPreference_valueFormatText, 0); 53 mMaxValue = a.getInt(R.styleable.SeekBarDialogPreference_maxValue, 0); 54 mMinValue = a.getInt(R.styleable.SeekBarDialogPreference_minValue, 0); 55 mStepValue = a.getInt(R.styleable.SeekBarDialogPreference_stepValue, 0); 56 a.recycle(); 57 setDialogLayoutResource(R.layout.seek_bar_dialog); 58 } 59 setInterface(final ValueProxy proxy)60 public void setInterface(final ValueProxy proxy) { 61 mValueProxy = proxy; 62 setSummary(getValueText(clipValue(proxy.readValue(getKey())))); 63 } 64 getValueText(final int value)65 private String getValueText(final int value) { 66 if (mValueFormatResId == 0) { 67 return Integer.toString(value); 68 } else { 69 return getContext().getString(mValueFormatResId, value); 70 } 71 } 72 73 @Override onCreateDialogView()74 protected View onCreateDialogView() { 75 final View view = super.onCreateDialogView(); 76 mSeekBar = (SeekBar)view.findViewById(R.id.seek_bar_dialog_bar); 77 mSeekBar.setMax(mMaxValue - mMinValue); 78 mSeekBar.setOnSeekBarChangeListener(this); 79 mValueView = (TextView)view.findViewById(R.id.seek_bar_dialog_value); 80 return view; 81 } 82 getProgressFromValue(final int value)83 private int getProgressFromValue(final int value) { 84 return value - mMinValue; 85 } 86 getValueFromProgress(final int progress)87 private int getValueFromProgress(final int progress) { 88 return progress + mMinValue; 89 } 90 clipValue(final int value)91 private int clipValue(final int value) { 92 final int clippedValue = Math.min(mMaxValue, Math.max(mMinValue, value)); 93 if (mStepValue <= 1) { 94 return clippedValue; 95 } 96 return clippedValue - (clippedValue % mStepValue); 97 } 98 getClippedValueFromProgress(final int progress)99 private int getClippedValueFromProgress(final int progress) { 100 return clipValue(getValueFromProgress(progress)); 101 } 102 setValue(final int value, final boolean fromUser)103 private void setValue(final int value, final boolean fromUser) { 104 mValueView.setText(getValueText(value)); 105 if (!fromUser) { 106 mSeekBar.setProgress(getProgressFromValue(value)); 107 } 108 } 109 110 @Override onBindDialogView(final View view)111 protected void onBindDialogView(final View view) { 112 setValue(clipValue(mValueProxy.readValue(getKey())), false /* fromUser */); 113 } 114 115 @Override onPrepareDialogBuilder(final AlertDialog.Builder builder)116 protected void onPrepareDialogBuilder(final AlertDialog.Builder builder) { 117 builder.setPositiveButton(android.R.string.ok, this) 118 .setNegativeButton(android.R.string.cancel, this) 119 .setNeutralButton(R.string.button_default, this); 120 } 121 122 @Override onClick(final DialogInterface dialog, final int which)123 public void onClick(final DialogInterface dialog, final int which) { 124 super.onClick(dialog, which); 125 if (which == DialogInterface.BUTTON_NEUTRAL) { 126 setValue(clipValue(mValueProxy.readDefaultValue(getKey())), false /* fromUser */); 127 } 128 if (which != DialogInterface.BUTTON_NEGATIVE) { 129 setSummary(mValueView.getText()); 130 mValueProxy.writeValue(getClippedValueFromProgress(mSeekBar.getProgress()), getKey()); 131 } 132 } 133 134 @Override onProgressChanged(final SeekBar seekBar, final int progress, final boolean fromUser)135 public void onProgressChanged(final SeekBar seekBar, final int progress, 136 final boolean fromUser) { 137 setValue(getClippedValueFromProgress(progress), fromUser); 138 } 139 140 @Override onStartTrackingTouch(final SeekBar seekBar)141 public void onStartTrackingTouch(final SeekBar seekBar) {} 142 143 @Override onStopTrackingTouch(final SeekBar seekBar)144 public void onStopTrackingTouch(final SeekBar seekBar) { 145 mValueProxy.feedbackValue(getClippedValueFromProgress(seekBar.getProgress())); 146 } 147 } 148