286 lines
10 KiB
Java
286 lines
10 KiB
Java
/*
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* Copyright (C) 2011 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;
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import android.content.Context;
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import android.util.AttributeSet;
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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 com.android.inputmethod.accessibility.AccessibilityUtils;
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import com.android.inputmethod.accessibility.MoreKeysKeyboardAccessibilityDelegate;
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import com.android.inputmethod.latin.Constants;
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import com.android.inputmethod.latin.R;
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import com.android.inputmethod.latin.utils.CoordinateUtils;
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/**
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* A view that renders a virtual {@link MoreKeysKeyboard}. It handles rendering of keys and
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* detecting key presses and touch movements.
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*/
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public class MoreKeysKeyboardView extends KeyboardView implements MoreKeysPanel {
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private final int[] mCoordinates = CoordinateUtils.newInstance();
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protected final KeyDetector mKeyDetector;
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private Controller mController = EMPTY_CONTROLLER;
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protected KeyboardActionListener mListener;
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private int mOriginX;
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private int mOriginY;
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private Key mCurrentKey;
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private int mActivePointerId;
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protected MoreKeysKeyboardAccessibilityDelegate mAccessibilityDelegate;
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public MoreKeysKeyboardView(final Context context, final AttributeSet attrs) {
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this(context, attrs, R.attr.moreKeysKeyboardViewStyle);
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}
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public MoreKeysKeyboardView(final Context context, final AttributeSet attrs,
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final int defStyle) {
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super(context, attrs, defStyle);
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mKeyDetector = new MoreKeysDetector(getResources().getDimension(
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R.dimen.config_more_keys_keyboard_slide_allowance));
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}
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@Override
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protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
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final Keyboard keyboard = getKeyboard();
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if (keyboard != null) {
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final int width = keyboard.mOccupiedWidth + getPaddingLeft() + getPaddingRight();
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final int height = keyboard.mOccupiedHeight + getPaddingTop() + getPaddingBottom();
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setMeasuredDimension(width, height);
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} else {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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}
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@Override
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public void setKeyboard(final Keyboard keyboard) {
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super.setKeyboard(keyboard);
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mKeyDetector.setKeyboard(
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keyboard, -getPaddingLeft(), -getPaddingTop() + getVerticalCorrection());
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if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) {
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if (mAccessibilityDelegate == null) {
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mAccessibilityDelegate = new MoreKeysKeyboardAccessibilityDelegate(
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this, mKeyDetector);
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mAccessibilityDelegate.setOpenAnnounce(R.string.spoken_open_more_keys_keyboard);
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mAccessibilityDelegate.setCloseAnnounce(R.string.spoken_close_more_keys_keyboard);
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}
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mAccessibilityDelegate.setKeyboard(keyboard);
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} else {
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mAccessibilityDelegate = null;
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}
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}
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@Override
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public void showMoreKeysPanel(final View parentView, final Controller controller,
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final int pointX, final int pointY, final KeyboardActionListener listener) {
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mController = controller;
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mListener = listener;
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final View container = getContainerView();
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// The coordinates of panel's left-top corner in parentView's coordinate system.
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// We need to consider background drawable paddings.
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final int x = pointX - getDefaultCoordX() - container.getPaddingLeft() - getPaddingLeft();
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final int y = pointY - container.getMeasuredHeight() + container.getPaddingBottom()
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+ getPaddingBottom();
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parentView.getLocationInWindow(mCoordinates);
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// Ensure the horizontal position of the panel does not extend past the parentView edges.
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final int maxX = parentView.getMeasuredWidth() - container.getMeasuredWidth();
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final int panelX = Math.max(0, Math.min(maxX, x)) + CoordinateUtils.x(mCoordinates);
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final int panelY = y + CoordinateUtils.y(mCoordinates);
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container.setX(panelX);
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container.setY(panelY);
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mOriginX = x + container.getPaddingLeft();
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mOriginY = y + container.getPaddingTop();
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controller.onShowMoreKeysPanel(this);
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final MoreKeysKeyboardAccessibilityDelegate accessibilityDelegate = mAccessibilityDelegate;
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if (accessibilityDelegate != null) {
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accessibilityDelegate.onShowMoreKeysKeyboard();
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}
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}
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/**
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* Returns the default x coordinate for showing this panel.
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*/
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protected int getDefaultCoordX() {
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return ((MoreKeysKeyboard)getKeyboard()).getDefaultCoordX();
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}
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@Override
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public void onDownEvent(final int x, final int y, final int pointerId, final long eventTime) {
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mActivePointerId = pointerId;
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mCurrentKey = detectKey(x, y);
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}
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@Override
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public void onMoveEvent(final int x, final int y, final int pointerId, final long eventTime) {
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if (mActivePointerId != pointerId) {
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return;
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}
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final boolean hasOldKey = (mCurrentKey != null);
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mCurrentKey = detectKey(x, y);
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if (hasOldKey && mCurrentKey == null) {
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// A more keys keyboard is canceled when detecting no key.
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mController.onCancelMoreKeysPanel();
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}
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}
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@Override
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public void onUpEvent(final int x, final int y, final int pointerId, final long eventTime) {
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if (mActivePointerId != pointerId) {
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return;
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}
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// Calling {@link #detectKey(int,int,int)} here is harmless because the last move event and
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// the following up event share the same coordinates.
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mCurrentKey = detectKey(x, y);
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if (mCurrentKey != null) {
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updateReleaseKeyGraphics(mCurrentKey);
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onKeyInput(mCurrentKey, x, y);
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mCurrentKey = null;
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}
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}
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/**
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* Performs the specific action for this panel when the user presses a key on the panel.
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*/
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protected void onKeyInput(final Key key, final int x, final int y) {
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final int code = key.getCode();
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if (code == Constants.CODE_OUTPUT_TEXT) {
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mListener.onTextInput(mCurrentKey.getOutputText());
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} else if (code != Constants.CODE_UNSPECIFIED) {
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if (getKeyboard().hasProximityCharsCorrection(code)) {
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mListener.onCodeInput(code, x, y, false /* isKeyRepeat */);
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} else {
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mListener.onCodeInput(code, Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE,
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false /* isKeyRepeat */);
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}
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}
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}
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private Key detectKey(int x, int y) {
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final Key oldKey = mCurrentKey;
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final Key newKey = mKeyDetector.detectHitKey(x, y);
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if (newKey == oldKey) {
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return newKey;
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}
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// A new key is detected.
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if (oldKey != null) {
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updateReleaseKeyGraphics(oldKey);
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invalidateKey(oldKey);
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}
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if (newKey != null) {
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updatePressKeyGraphics(newKey);
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invalidateKey(newKey);
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}
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return newKey;
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}
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private void updateReleaseKeyGraphics(final Key key) {
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key.onReleased();
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invalidateKey(key);
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}
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private void updatePressKeyGraphics(final Key key) {
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key.onPressed();
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invalidateKey(key);
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}
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@Override
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public void dismissMoreKeysPanel() {
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if (!isShowingInParent()) {
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return;
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}
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final MoreKeysKeyboardAccessibilityDelegate accessibilityDelegate = mAccessibilityDelegate;
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if (accessibilityDelegate != null) {
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accessibilityDelegate.onDismissMoreKeysKeyboard();
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}
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mController.onDismissMoreKeysPanel();
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}
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@Override
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public int translateX(final int x) {
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return x - mOriginX;
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}
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@Override
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public int translateY(final int y) {
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return y - mOriginY;
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}
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@Override
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public boolean onTouchEvent(final MotionEvent me) {
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final int action = me.getActionMasked();
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final long eventTime = me.getEventTime();
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final int index = me.getActionIndex();
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final int x = (int)me.getX(index);
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final int y = (int)me.getY(index);
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final int pointerId = me.getPointerId(index);
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switch (action) {
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case MotionEvent.ACTION_DOWN:
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case MotionEvent.ACTION_POINTER_DOWN:
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onDownEvent(x, y, pointerId, eventTime);
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break;
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case MotionEvent.ACTION_UP:
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case MotionEvent.ACTION_POINTER_UP:
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onUpEvent(x, y, pointerId, eventTime);
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break;
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case MotionEvent.ACTION_MOVE:
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onMoveEvent(x, y, pointerId, eventTime);
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break;
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}
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean onHoverEvent(final MotionEvent event) {
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final MoreKeysKeyboardAccessibilityDelegate accessibilityDelegate = mAccessibilityDelegate;
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if (accessibilityDelegate != null) {
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return accessibilityDelegate.onHoverEvent(event);
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}
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return super.onHoverEvent(event);
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}
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private View getContainerView() {
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return (View)getParent();
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}
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@Override
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public void showInParent(final ViewGroup parentView) {
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removeFromParent();
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parentView.addView(getContainerView());
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}
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@Override
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public void removeFromParent() {
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final View containerView = getContainerView();
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final ViewGroup currentParent = (ViewGroup)containerView.getParent();
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if (currentParent != null) {
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currentParent.removeView(containerView);
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}
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}
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@Override
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public boolean isShowingInParent() {
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return (getContainerView().getParent() != null);
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}
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}
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