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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin.suggestions;
import android.content.Context;
import android.content.res.Resources;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.PopupWindow;
import com.android.inputmethod.keyboard.KeyDetector;
import com.android.inputmethod.keyboard.Keyboard;
import com.android.inputmethod.keyboard.KeyboardActionListener;
import com.android.inputmethod.keyboard.KeyboardView;
import com.android.inputmethod.keyboard.MoreKeysDetector;
import com.android.inputmethod.keyboard.MoreKeysPanel;
import com.android.inputmethod.keyboard.PointerTracker;
import com.android.inputmethod.keyboard.PointerTracker.DrawingProxy;
import com.android.inputmethod.keyboard.PointerTracker.KeyEventHandler;
import com.android.inputmethod.keyboard.PointerTracker.TimerProxy;
import com.android.inputmethod.latin.R;
/**
* A view that renders a virtual {@link MoreSuggestions}. It handles rendering of keys and detecting
* key presses and touch movements.
*/
public class MoreSuggestionsView extends KeyboardView implements MoreKeysPanel {
private final int[] mCoordinates = new int[2];
private final KeyDetector mModalPanelKeyDetector;
private final KeyDetector mSlidingPanelKeyDetector;
private Controller mController;
private KeyboardActionListener mListener;
private int mOriginX;
private int mOriginY;
private static final TimerProxy EMPTY_TIMER_PROXY = new TimerProxy.Adapter();
private final KeyboardActionListener mSuggestionsPaneListener =
new KeyboardActionListener.Adapter() {
@Override
public void onPressKey(int primaryCode) {
mListener.onPressKey(primaryCode);
}
@Override
public void onReleaseKey(int primaryCode, boolean withSliding) {
mListener.onReleaseKey(primaryCode, withSliding);
}
@Override
public void onCodeInput(int primaryCode, int[] keyCodes, int x, int y) {
final int index = primaryCode - MoreSuggestions.SUGGESTION_CODE_BASE;
if (index >= 0 && index < SuggestionsView.MAX_SUGGESTIONS) {
mListener.onCustomRequest(index);
}
}
@Override
public void onCancelInput() {
mListener.onCancelInput();
}
};
public MoreSuggestionsView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.moreSuggestionsViewStyle);
}
public MoreSuggestionsView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
final Resources res = context.getResources();
mModalPanelKeyDetector = new KeyDetector(/* keyHysteresisDistance */ 0);
mSlidingPanelKeyDetector = new MoreKeysDetector(
res.getDimension(R.dimen.more_suggestions_slide_allowance));
setKeyPreviewPopupEnabled(false, 0);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final Keyboard keyboard = getKeyboard();
if (keyboard != null) {
final int width = keyboard.mOccupiedWidth + getPaddingLeft() + getPaddingRight();
final int height = keyboard.mOccupiedHeight + getPaddingTop() + getPaddingBottom();
setMeasuredDimension(width, height);
} else {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
@Override
public void setKeyboard(Keyboard keyboard) {
super.setKeyboard(keyboard);
mModalPanelKeyDetector.setKeyboard(keyboard, -getPaddingLeft(), -getPaddingTop());
mSlidingPanelKeyDetector.setKeyboard(keyboard, -getPaddingLeft(),
-getPaddingTop() + mVerticalCorrection);
}
@Override
public KeyDetector getKeyDetector() {
return mSlidingPanelKeyDetector;
}
@Override
public KeyboardActionListener getKeyboardActionListener() {
return mSuggestionsPaneListener;
}
@Override
public DrawingProxy getDrawingProxy() {
return this;
}
@Override
public TimerProxy getTimerProxy() {
return EMPTY_TIMER_PROXY;
}
@Override
public void setKeyPreviewPopupEnabled(boolean previewEnabled, int delay) {
// Suggestions pane needs no pop-up key preview displayed, so we pass always false with a
// delay of 0. The delay does not matter actually since the popup is not shown anyway.
super.setKeyPreviewPopupEnabled(false, 0);
}
@Override
public void showMoreKeysPanel(View parentView, Controller controller, int pointX, int pointY,
PopupWindow window, KeyboardActionListener listener) {
mController = controller;
mListener = listener;
final View container = (View)getParent();
final MoreSuggestions pane = (MoreSuggestions)getKeyboard();
parentView.getLocationInWindow(mCoordinates);
final int paneLeft = pointX - (pane.mOccupiedWidth / 2) + parentView.getPaddingLeft();
final int x = wrapUp(Math.max(0, Math.min(paneLeft,
parentView.getWidth() - pane.mOccupiedWidth))
- container.getPaddingLeft() + mCoordinates[0],
container.getMeasuredWidth(), 0, parentView.getWidth());
final int y = pointY
- (container.getMeasuredHeight() - container.getPaddingBottom())
+ parentView.getPaddingTop() + mCoordinates[1];
window.setContentView(container);
window.setWidth(container.getMeasuredWidth());
window.setHeight(container.getMeasuredHeight());
window.showAtLocation(parentView, Gravity.NO_GRAVITY, x, y);
mOriginX = x + container.getPaddingLeft() - mCoordinates[0];
mOriginY = y + container.getPaddingTop() - mCoordinates[1];
}
private static int wrapUp(int x, int width, int left, int right) {
if (x < left)
return left;
if (x + width > right)
return right - width;
return x;
}
private boolean mIsDismissing;
@Override
public boolean dismissMoreKeysPanel() {
if (mIsDismissing) return false;
mIsDismissing = true;
final boolean dismissed = mController.dismissMoreKeysPanel();
mIsDismissing = false;
return dismissed;
}
@Override
public int translateX(int x) {
return x - mOriginX;
}
@Override
public int translateY(int y) {
return y - mOriginY;
}
private final KeyEventHandler mModalPanelKeyEventHandler = new KeyEventHandler() {
@Override
public KeyDetector getKeyDetector() {
return mModalPanelKeyDetector;
}
@Override
public KeyboardActionListener getKeyboardActionListener() {
return mSuggestionsPaneListener;
}
@Override
public DrawingProxy getDrawingProxy() {
return MoreSuggestionsView.this;
}
@Override
public TimerProxy getTimerProxy() {
return EMPTY_TIMER_PROXY;
}
};
@Override
public boolean onTouchEvent(MotionEvent me) {
final int action = me.getAction();
final long eventTime = me.getEventTime();
final int index = me.getActionIndex();
final int id = me.getPointerId(index);
final PointerTracker tracker = PointerTracker.getPointerTracker(id, this);
final int x = (int)me.getX(index);
final int y = (int)me.getY(index);
tracker.processMotionEvent(action, x, y, eventTime, mModalPanelKeyEventHandler);
return true;
}
}
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