763 lines
28 KiB
Java
763 lines
28 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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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.android.inputmethod.latin;
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import java.util.List;
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import java.util.Locale;
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import android.content.Context;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.content.res.XmlResourceParser;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.ColorFilter;
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import android.graphics.Paint;
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import android.graphics.PixelFormat;
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import android.graphics.PorterDuff;
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import android.graphics.Rect;
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import android.graphics.Paint.Align;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.inputmethodservice.Keyboard;
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import android.text.TextPaint;
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import android.util.Log;
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import android.view.ViewConfiguration;
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import android.view.inputmethod.EditorInfo;
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public class LatinKeyboard extends Keyboard {
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private static final boolean DEBUG_PREFERRED_LETTER = false;
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private static final String TAG = "LatinKeyboard";
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private Drawable mShiftLockIcon;
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private Drawable mShiftLockPreviewIcon;
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private Drawable mOldShiftIcon;
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private Drawable mOldShiftPreviewIcon;
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private Drawable mSpaceIcon;
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private Drawable mSpacePreviewIcon;
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private Drawable mMicIcon;
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private Drawable mMicPreviewIcon;
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private Drawable m123MicIcon;
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private Drawable m123MicPreviewIcon;
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private Drawable mButtonArrowLeftIcon;
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private Drawable mButtonArrowRightIcon;
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private Key mShiftKey;
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private Key mEnterKey;
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private Key mF1Key;
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private Key mSpaceKey;
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private Key m123Key;
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private int mSpaceKeyIndex = -1;
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private int mSpaceDragStartX;
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private int mSpaceDragLastDiff;
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/* package */ Locale mLocale;
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private LanguageSwitcher mLanguageSwitcher;
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private Resources mRes;
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private Context mContext;
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private int mMode;
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// Whether this keyboard has voice icon on it
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private boolean mHasVoiceButton;
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// Whether voice icon is enabled at all
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private boolean mVoiceEnabled;
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private boolean mIsAlphaKeyboard;
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private CharSequence m123Label;
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private boolean mCurrentlyInSpace;
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private SlidingLocaleDrawable mSlidingLocaleIcon;
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private Rect mBounds = new Rect();
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private int[] mPrefLetterFrequencies;
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private boolean mPreemptiveCorrection;
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private int mPrefLetter;
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private int mPrefLetterX;
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private int mPrefLetterY;
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private int mPrefDistance;
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private int mExtensionResId;
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private static final int SHIFT_OFF = 0;
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private static final int SHIFT_ON = 1;
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private static final int SHIFT_LOCKED = 2;
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private int mShiftState = SHIFT_OFF;
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private static final float SPACEBAR_DRAG_THRESHOLD = 0.8f;
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private static final float OVERLAP_PERCENTAGE_LOW_PROB = 0.70f;
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private static final float OVERLAP_PERCENTAGE_HIGH_PROB = 0.85f;
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static int sSpacebarVerticalCorrection;
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public LatinKeyboard(Context context, int xmlLayoutResId) {
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this(context, xmlLayoutResId, 0);
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}
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public LatinKeyboard(Context context, int xmlLayoutResId, int mode) {
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super(context, xmlLayoutResId, mode);
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final Resources res = context.getResources();
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mContext = context;
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mMode = mode;
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mRes = res;
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mShiftLockIcon = res.getDrawable(R.drawable.sym_keyboard_shift_locked);
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mShiftLockPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_shift_locked);
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mShiftLockPreviewIcon.setBounds(0, 0,
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mShiftLockPreviewIcon.getIntrinsicWidth(),
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mShiftLockPreviewIcon.getIntrinsicHeight());
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mSpaceIcon = res.getDrawable(R.drawable.sym_keyboard_space);
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mSpacePreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_space);
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mMicIcon = res.getDrawable(R.drawable.sym_keyboard_mic);
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mMicPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_mic);
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setDefaultBounds(mMicPreviewIcon);
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mButtonArrowLeftIcon = res.getDrawable(R.drawable.sym_keyboard_language_arrows_left);
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mButtonArrowRightIcon = res.getDrawable(R.drawable.sym_keyboard_language_arrows_right);
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m123MicIcon = res.getDrawable(R.drawable.sym_keyboard_123_mic);
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m123MicPreviewIcon = res.getDrawable(R.drawable.sym_keyboard_feedback_123_mic);
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setDefaultBounds(m123MicPreviewIcon);
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sSpacebarVerticalCorrection = res.getDimensionPixelOffset(
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R.dimen.spacebar_vertical_correction);
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mIsAlphaKeyboard = xmlLayoutResId == R.xml.kbd_qwerty;
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mSpaceKeyIndex = indexOf((int) ' ');
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}
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public LatinKeyboard(Context context, int layoutTemplateResId,
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CharSequence characters, int columns, int horizontalPadding) {
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super(context, layoutTemplateResId, characters, columns, horizontalPadding);
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}
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@Override
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protected Key createKeyFromXml(Resources res, Row parent, int x, int y,
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XmlResourceParser parser) {
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Key key = new LatinKey(res, parent, x, y, parser);
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switch (key.codes[0]) {
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case 10:
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mEnterKey = key;
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break;
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case LatinKeyboardView.KEYCODE_F1:
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mF1Key = key;
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break;
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case 32:
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mSpaceKey = key;
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break;
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case KEYCODE_MODE_CHANGE:
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m123Key = key;
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m123Label = key.label;
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break;
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}
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return key;
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}
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void setImeOptions(Resources res, int mode, int options) {
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if (mEnterKey != null) {
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// Reset some of the rarely used attributes.
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mEnterKey.popupCharacters = null;
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mEnterKey.popupResId = 0;
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mEnterKey.text = null;
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switch (options&(EditorInfo.IME_MASK_ACTION|EditorInfo.IME_FLAG_NO_ENTER_ACTION)) {
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case EditorInfo.IME_ACTION_GO:
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mEnterKey.iconPreview = null;
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mEnterKey.icon = null;
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mEnterKey.label = res.getText(R.string.label_go_key);
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break;
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case EditorInfo.IME_ACTION_NEXT:
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mEnterKey.iconPreview = null;
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mEnterKey.icon = null;
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mEnterKey.label = res.getText(R.string.label_next_key);
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break;
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case EditorInfo.IME_ACTION_DONE:
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mEnterKey.iconPreview = null;
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mEnterKey.icon = null;
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mEnterKey.label = res.getText(R.string.label_done_key);
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break;
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case EditorInfo.IME_ACTION_SEARCH:
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mEnterKey.iconPreview = res.getDrawable(
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R.drawable.sym_keyboard_feedback_search);
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mEnterKey.icon = res.getDrawable(
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R.drawable.sym_keyboard_search);
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mEnterKey.label = null;
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break;
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case EditorInfo.IME_ACTION_SEND:
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mEnterKey.iconPreview = null;
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mEnterKey.icon = null;
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mEnterKey.label = res.getText(R.string.label_send_key);
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break;
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default:
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if (mode == KeyboardSwitcher.MODE_IM) {
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mEnterKey.icon = null;
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mEnterKey.iconPreview = null;
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mEnterKey.label = ":-)";
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mEnterKey.text = ":-) ";
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mEnterKey.popupResId = R.xml.popup_smileys;
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} else {
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mEnterKey.iconPreview = res.getDrawable(
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R.drawable.sym_keyboard_feedback_return);
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mEnterKey.icon = res.getDrawable(
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R.drawable.sym_keyboard_return);
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mEnterKey.label = null;
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}
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break;
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}
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// Set the initial size of the preview icon
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if (mEnterKey.iconPreview != null) {
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mEnterKey.iconPreview.setBounds(0, 0,
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mEnterKey.iconPreview.getIntrinsicWidth(),
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mEnterKey.iconPreview.getIntrinsicHeight());
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}
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}
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}
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void enableShiftLock() {
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int index = getShiftKeyIndex();
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if (index >= 0) {
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mShiftKey = getKeys().get(index);
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if (mShiftKey instanceof LatinKey) {
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((LatinKey)mShiftKey).enableShiftLock();
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}
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mOldShiftIcon = mShiftKey.icon;
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mOldShiftPreviewIcon = mShiftKey.iconPreview;
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}
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}
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void setShiftLocked(boolean shiftLocked) {
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if (mShiftKey != null) {
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if (shiftLocked) {
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mShiftKey.on = true;
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mShiftKey.icon = mShiftLockIcon;
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mShiftState = SHIFT_LOCKED;
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} else {
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mShiftKey.on = false;
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mShiftKey.icon = mShiftLockIcon;
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mShiftState = SHIFT_ON;
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}
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}
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}
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boolean isShiftLocked() {
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return mShiftState == SHIFT_LOCKED;
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}
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@Override
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public boolean setShifted(boolean shiftState) {
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boolean shiftChanged = false;
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if (mShiftKey != null) {
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if (shiftState == false) {
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shiftChanged = mShiftState != SHIFT_OFF;
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mShiftState = SHIFT_OFF;
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mShiftKey.on = false;
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mShiftKey.icon = mOldShiftIcon;
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} else {
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if (mShiftState == SHIFT_OFF) {
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shiftChanged = mShiftState == SHIFT_OFF;
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mShiftState = SHIFT_ON;
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mShiftKey.icon = mShiftLockIcon;
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}
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}
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} else {
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return super.setShifted(shiftState);
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}
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return shiftChanged;
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}
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@Override
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public boolean isShifted() {
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if (mShiftKey != null) {
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return mShiftState != SHIFT_OFF;
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} else {
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return super.isShifted();
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}
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}
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public void setExtension(int resId) {
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mExtensionResId = resId;
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}
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public int getExtension() {
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return mExtensionResId;
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}
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private void setDefaultBounds(Drawable drawable) {
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drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
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}
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public void setVoiceMode(boolean hasVoiceButton, boolean hasVoice) {
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mHasVoiceButton = hasVoiceButton;
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mVoiceEnabled = hasVoice;
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updateF1Key();
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}
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private void updateF1Key() {
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if (mF1Key == null) return;
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if (m123Key != null && mIsAlphaKeyboard) {
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if (mVoiceEnabled && !mHasVoiceButton) {
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m123Key.icon = m123MicIcon;
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m123Key.iconPreview = m123MicPreviewIcon;
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m123Key.label = null;
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} else {
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m123Key.icon = null;
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m123Key.iconPreview = null;
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m123Key.label = m123Label;
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}
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}
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if (mHasVoiceButton && mVoiceEnabled) {
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mF1Key.codes = new int[] { LatinKeyboardView.KEYCODE_VOICE };
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mF1Key.label = null;
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mF1Key.icon = mMicIcon;
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mF1Key.iconPreview = mMicPreviewIcon;
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} else {
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mF1Key.label = ",";
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mF1Key.codes = new int[] { ',' };
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mF1Key.icon = null;
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mF1Key.iconPreview = null;
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}
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}
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private void updateSpaceBarForLocale() {
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if (mLocale != null) {
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// Create the graphic for spacebar
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Bitmap buffer = Bitmap.createBitmap(mSpaceKey.width, mSpaceIcon.getIntrinsicHeight(),
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Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(buffer);
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drawSpaceBar(canvas, buffer.getWidth(), buffer.getHeight(), 255);
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mSpaceKey.icon = new BitmapDrawable(mRes, buffer);
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mSpaceKey.repeatable = mLanguageSwitcher.getLocaleCount() < 2;
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} else {
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mSpaceKey.icon = mRes.getDrawable(R.drawable.sym_keyboard_space);
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mSpaceKey.repeatable = true;
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}
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}
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private void drawSpaceBar(Canvas canvas, int width, int height, int opacity) {
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canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR);
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Paint paint = new Paint();
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paint.setAntiAlias(true);
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paint.setAlpha(opacity);
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// Get the text size from the theme
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paint.setTextSize(getTextSizeFromTheme(android.R.style.TextAppearance_Small, 14));
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paint.setTextAlign(Align.CENTER);
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//// Draw a drop shadow for the text
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//paint.setShadowLayer(2f, 0, 0, 0xFF000000);
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final String language = getInputLanguage(mSpaceKey.width, paint);
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final int ascent = (int) -paint.ascent();
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paint.setColor(0x80000000);
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canvas.drawText(language,
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width / 2, ascent - 1, paint);
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paint.setColor(0xFF808080);
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canvas.drawText(language,
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width / 2, ascent, paint);
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// Put arrows on either side of the text
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if (mLanguageSwitcher.getLocaleCount() > 1) {
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Rect bounds = new Rect();
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paint.getTextBounds(language, 0, language.length(), bounds);
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drawButtonArrow(mButtonArrowLeftIcon, canvas,
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(mSpaceKey.width - bounds.right) / 2
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- mButtonArrowLeftIcon.getIntrinsicWidth(),
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(int) paint.getTextSize());
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drawButtonArrow(mButtonArrowRightIcon, canvas,
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(mSpaceKey.width + bounds.right) / 2, (int) paint.getTextSize());
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}
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// Draw the spacebar icon at the bottom
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int x = (width - mSpaceIcon.getIntrinsicWidth()) / 2;
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int y = height - mSpaceIcon.getIntrinsicHeight();
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mSpaceIcon.setBounds(x, y,
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x + mSpaceIcon.getIntrinsicWidth(), y + mSpaceIcon.getIntrinsicHeight());
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mSpaceIcon.draw(canvas);
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}
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private void drawButtonArrow(Drawable arrow, Canvas canvas, int x, int bottomY) {
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arrow.setBounds(x, bottomY - arrow.getIntrinsicHeight(), x + arrow.getIntrinsicWidth(),
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bottomY);
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arrow.draw(canvas);
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}
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private String getInputLanguage(int widthAvail, Paint paint) {
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return chooseDisplayName(mLanguageSwitcher.getInputLocale(), widthAvail, paint);
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}
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private String getNextInputLanguage(int widthAvail, Paint paint) {
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return chooseDisplayName(mLanguageSwitcher.getNextInputLocale(), widthAvail, paint);
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}
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private String getPrevInputLanguage(int widthAvail, Paint paint) {
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return chooseDisplayName(mLanguageSwitcher.getPrevInputLocale(), widthAvail, paint);
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}
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private String chooseDisplayName(Locale locale, int widthAvail, Paint paint) {
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if (widthAvail < (int) (.35 * getMinWidth())) {
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return LanguageSwitcher.toTitleCase(locale.getLanguage().substring(0, 2));
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} else {
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return LanguageSwitcher.toTitleCase(locale.getDisplayLanguage(locale));
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}
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}
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private void updateLocaleDrag(int diff) {
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if (mSlidingLocaleIcon == null) {
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mSlidingLocaleIcon = new SlidingLocaleDrawable(mSpacePreviewIcon, mSpaceKey.width,
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mSpacePreviewIcon.getIntrinsicHeight());
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mSlidingLocaleIcon.setBounds(0, 0, mSpaceKey.width,
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mSpacePreviewIcon.getIntrinsicHeight());
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mSpaceKey.iconPreview = mSlidingLocaleIcon;
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}
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mSlidingLocaleIcon.setDiff(diff);
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if (Math.abs(diff) == Integer.MAX_VALUE) {
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mSpaceKey.iconPreview = mSpacePreviewIcon;
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} else {
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mSpaceKey.iconPreview = mSlidingLocaleIcon;
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}
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mSpaceKey.iconPreview.invalidateSelf();
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}
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public int getLanguageChangeDirection() {
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if (mSpaceKey == null || mLanguageSwitcher.getLocaleCount() < 2
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|| Math.abs(mSpaceDragLastDiff) < mSpaceKey.width * SPACEBAR_DRAG_THRESHOLD ) {
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return 0; // No change
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}
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return mSpaceDragLastDiff > 0 ? 1 : -1;
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}
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public void setLanguageSwitcher(LanguageSwitcher switcher) {
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mLanguageSwitcher = switcher;
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Locale locale = mLanguageSwitcher.getLocaleCount() > 0
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? mLanguageSwitcher.getInputLocale()
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: null;
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if (mLocale != null && mLocale.equals(locale)) return;
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mLocale = locale;
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updateSpaceBarForLocale();
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}
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boolean isCurrentlyInSpace() {
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return mCurrentlyInSpace;
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}
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void setPreferredLetters(int[] frequencies) {
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mPrefLetterFrequencies = frequencies;
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mPrefLetter = 0;
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}
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void keyReleased() {
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mCurrentlyInSpace = false;
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mSpaceDragLastDiff = 0;
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mPrefLetter = 0;
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mPrefLetterX = 0;
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mPrefLetterY = 0;
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mPrefDistance = Integer.MAX_VALUE;
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if (mSpaceKey != null) {
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updateLocaleDrag(Integer.MAX_VALUE);
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}
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}
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/**
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* Does the magic of locking the touch gesture into the spacebar when
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* switching input languages.
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*/
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boolean isInside(LatinKey key, int x, int y) {
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final int code = key.codes[0];
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if (code == KEYCODE_SHIFT ||
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code == KEYCODE_DELETE) {
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y -= key.height / 10;
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if (code == KEYCODE_SHIFT) x += key.width / 6;
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if (code == KEYCODE_DELETE) x -= key.width / 6;
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} else if (code == LatinIME.KEYCODE_SPACE) {
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y += LatinKeyboard.sSpacebarVerticalCorrection;
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if (mLanguageSwitcher.getLocaleCount() > 1) {
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if (mCurrentlyInSpace) {
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int diff = x - mSpaceDragStartX;
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if (Math.abs(diff - mSpaceDragLastDiff) > 0) {
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updateLocaleDrag(diff);
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}
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mSpaceDragLastDiff = diff;
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return true;
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} else {
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boolean insideSpace = key.isInsideSuper(x, y);
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if (insideSpace) {
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mCurrentlyInSpace = true;
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mSpaceDragStartX = x;
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updateLocaleDrag(0);
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}
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return insideSpace;
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}
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}
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} else if (mPrefLetterFrequencies != null) {
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// New coordinate? Reset
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if (mPrefLetterX != x || mPrefLetterY != y) {
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mPrefLetter = 0;
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mPrefDistance = Integer.MAX_VALUE;
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}
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// Handle preferred next letter
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final int[] pref = mPrefLetterFrequencies;
|
|
if (mPrefLetter > 0) {
|
|
if (DEBUG_PREFERRED_LETTER && mPrefLetter == code
|
|
&& !key.isInsideSuper(x, y)) {
|
|
Log.d(TAG, "CORRECTED !!!!!!");
|
|
}
|
|
return mPrefLetter == code;
|
|
} else {
|
|
final boolean inside = key.isInsideSuper(x, y);
|
|
int[] nearby = getNearestKeys(x, y);
|
|
List<Key> nearbyKeys = getKeys();
|
|
if (inside) {
|
|
// If it's a preferred letter
|
|
if (inPrefList(code, pref)) {
|
|
// Check if its frequency is much lower than a nearby key
|
|
mPrefLetter = code;
|
|
mPrefLetterX = x;
|
|
mPrefLetterY = y;
|
|
for (int i = 0; i < nearby.length; i++) {
|
|
Key k = nearbyKeys.get(nearby[i]);
|
|
if (k != key && inPrefList(k.codes[0], pref)) {
|
|
final int dist = distanceFrom(k, x, y);
|
|
if (dist < (int) (k.width * OVERLAP_PERCENTAGE_LOW_PROB) &&
|
|
(pref[k.codes[0]] > pref[mPrefLetter] * 3)) {
|
|
mPrefLetter = k.codes[0];
|
|
mPrefDistance = dist;
|
|
if (DEBUG_PREFERRED_LETTER) {
|
|
Log.d(TAG, "CORRECTED ALTHOUGH PREFERRED !!!!!!");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return mPrefLetter == code;
|
|
}
|
|
}
|
|
|
|
// Get the surrounding keys and intersect with the preferred list
|
|
// For all in the intersection
|
|
// if distance from touch point is within a reasonable distance
|
|
// make this the pref letter
|
|
// If no pref letter
|
|
// return inside;
|
|
// else return thiskey == prefletter;
|
|
|
|
for (int i = 0; i < nearby.length; i++) {
|
|
Key k = nearbyKeys.get(nearby[i]);
|
|
if (inPrefList(k.codes[0], pref)) {
|
|
final int dist = distanceFrom(k, x, y);
|
|
if (dist < (int) (k.width * OVERLAP_PERCENTAGE_HIGH_PROB)
|
|
&& dist < mPrefDistance) {
|
|
mPrefLetter = k.codes[0];
|
|
mPrefLetterX = x;
|
|
mPrefLetterY = y;
|
|
mPrefDistance = dist;
|
|
}
|
|
}
|
|
}
|
|
// Didn't find any
|
|
if (mPrefLetter == 0) {
|
|
return inside;
|
|
} else {
|
|
return mPrefLetter == code;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Lock into the spacebar
|
|
if (mCurrentlyInSpace) return false;
|
|
|
|
return key.isInsideSuper(x, y);
|
|
}
|
|
|
|
private boolean inPrefList(int code, int[] pref) {
|
|
if (code < pref.length && code >= 0) return pref[code] > 0;
|
|
return false;
|
|
}
|
|
|
|
private int distanceFrom(Key k, int x, int y) {
|
|
if (y > k.y && y < k.y + k.height) {
|
|
return Math.abs(k.x + k.width / 2 - x);
|
|
} else {
|
|
return Integer.MAX_VALUE;
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public int[] getNearestKeys(int x, int y) {
|
|
if (mCurrentlyInSpace) {
|
|
return new int[] { mSpaceKeyIndex };
|
|
} else {
|
|
return super.getNearestKeys(x, y);
|
|
}
|
|
}
|
|
|
|
private int indexOf(int code) {
|
|
List<Key> keys = getKeys();
|
|
int count = keys.size();
|
|
for (int i = 0; i < count; i++) {
|
|
if (keys.get(i).codes[0] == code) return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
private int getTextSizeFromTheme(int style, int defValue) {
|
|
TypedArray array = mContext.getTheme().obtainStyledAttributes(
|
|
style, new int[] { android.R.attr.textSize });
|
|
int textSize = array.getDimensionPixelSize(array.getResourceId(0, 0), defValue);
|
|
return textSize;
|
|
}
|
|
|
|
class LatinKey extends Keyboard.Key {
|
|
|
|
private boolean mShiftLockEnabled;
|
|
|
|
public LatinKey(Resources res, Keyboard.Row parent, int x, int y,
|
|
XmlResourceParser parser) {
|
|
super(res, parent, x, y, parser);
|
|
if (popupCharacters != null && popupCharacters.length() == 0) {
|
|
// If there is a keyboard with no keys specified in popupCharacters
|
|
popupResId = 0;
|
|
}
|
|
}
|
|
|
|
void enableShiftLock() {
|
|
mShiftLockEnabled = true;
|
|
}
|
|
|
|
@Override
|
|
public void onReleased(boolean inside) {
|
|
if (!mShiftLockEnabled) {
|
|
super.onReleased(inside);
|
|
} else {
|
|
pressed = !pressed;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Overriding this method so that we can reduce the target area for certain keys.
|
|
*/
|
|
@Override
|
|
public boolean isInside(int x, int y) {
|
|
boolean result = LatinKeyboard.this.isInside(this, x, y);
|
|
return result;
|
|
}
|
|
|
|
boolean isInsideSuper(int x, int y) {
|
|
return super.isInside(x, y);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Animation to be displayed on the spacebar preview popup when switching
|
|
* languages by swiping the spacebar. It draws the current, previous and
|
|
* next languages and moves them by the delta of touch movement on the spacebar.
|
|
*/
|
|
class SlidingLocaleDrawable extends Drawable {
|
|
|
|
private int mWidth;
|
|
private int mHeight;
|
|
private Drawable mBackground;
|
|
private int mDiff;
|
|
private TextPaint mTextPaint;
|
|
private int mMiddleX;
|
|
private int mAscent;
|
|
private Drawable mLeftDrawable;
|
|
private Drawable mRightDrawable;
|
|
private boolean mHitThreshold;
|
|
private int mThreshold;
|
|
private String mCurrentLanguage;
|
|
private String mNextLanguage;
|
|
private String mPrevLanguage;
|
|
|
|
public SlidingLocaleDrawable(Drawable background, int width, int height) {
|
|
mBackground = background;
|
|
mBackground.setBounds(0, 0,
|
|
mBackground.getIntrinsicWidth(), mBackground.getIntrinsicHeight());
|
|
mWidth = width;
|
|
mHeight = height;
|
|
mTextPaint = new TextPaint();
|
|
int textSize = getTextSizeFromTheme(android.R.style.TextAppearance_Medium, 18);
|
|
mTextPaint.setTextSize(textSize);
|
|
mTextPaint.setColor(0);
|
|
mTextPaint.setTextAlign(Align.CENTER);
|
|
mTextPaint.setAlpha(255);
|
|
mTextPaint.setAntiAlias(true);
|
|
mAscent = (int) mTextPaint.ascent();
|
|
mMiddleX = (mWidth - mBackground.getIntrinsicWidth()) / 2;
|
|
mLeftDrawable =
|
|
mRes.getDrawable(R.drawable.sym_keyboard_feedback_language_arrows_left);
|
|
mRightDrawable =
|
|
mRes.getDrawable(R.drawable.sym_keyboard_feedback_language_arrows_right);
|
|
mLeftDrawable.setBounds(0, 0,
|
|
mLeftDrawable.getIntrinsicWidth(), mLeftDrawable.getIntrinsicHeight());
|
|
mRightDrawable.setBounds(mWidth - mRightDrawable.getIntrinsicWidth(), 0,
|
|
mWidth, mRightDrawable.getIntrinsicHeight());
|
|
mThreshold = ViewConfiguration.get(mContext).getScaledTouchSlop();
|
|
}
|
|
|
|
void setDiff(int diff) {
|
|
if (diff == Integer.MAX_VALUE) {
|
|
mHitThreshold = false;
|
|
mCurrentLanguage = null;
|
|
return;
|
|
}
|
|
mDiff = diff;
|
|
if (mDiff > mWidth) mDiff = mWidth;
|
|
if (mDiff < -mWidth) mDiff = -mWidth;
|
|
if (Math.abs(mDiff) > mThreshold) mHitThreshold = true;
|
|
invalidateSelf();
|
|
}
|
|
|
|
@Override
|
|
public void draw(Canvas canvas) {
|
|
canvas.save();
|
|
if (mHitThreshold) {
|
|
mTextPaint.setColor(0xFF000000);
|
|
canvas.clipRect(0, 0, mWidth, mHeight);
|
|
if (mCurrentLanguage == null) {
|
|
mCurrentLanguage = getInputLanguage(mWidth, mTextPaint);
|
|
mNextLanguage = getNextInputLanguage(mWidth, mTextPaint);
|
|
mPrevLanguage = getPrevInputLanguage(mWidth, mTextPaint);
|
|
}
|
|
canvas.drawText(mCurrentLanguage,
|
|
mWidth / 2 + mDiff, -mAscent + 4, mTextPaint);
|
|
canvas.drawText(mNextLanguage,
|
|
mDiff - mWidth / 2, -mAscent + 4, mTextPaint);
|
|
canvas.drawText(mPrevLanguage,
|
|
mDiff + mWidth + mWidth / 2, -mAscent + 4, mTextPaint);
|
|
mLeftDrawable.draw(canvas);
|
|
mRightDrawable.draw(canvas);
|
|
}
|
|
if (mBackground != null) {
|
|
canvas.translate(mMiddleX, 0);
|
|
mBackground.draw(canvas);
|
|
}
|
|
canvas.restore();
|
|
}
|
|
|
|
@Override
|
|
public int getOpacity() {
|
|
return PixelFormat.TRANSLUCENT;
|
|
}
|
|
|
|
@Override
|
|
public void setAlpha(int alpha) {
|
|
// Ignore
|
|
}
|
|
|
|
@Override
|
|
public void setColorFilter(ColorFilter cf) {
|
|
// Ignore
|
|
}
|
|
|
|
@Override
|
|
public int getIntrinsicWidth() {
|
|
return mWidth;
|
|
}
|
|
|
|
@Override
|
|
public int getIntrinsicHeight() {
|
|
return mHeight;
|
|
}
|
|
}
|
|
}
|