84 lines
2.8 KiB
Java
84 lines
2.8 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 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.View.OnTouchListener;
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import android.widget.LinearLayout;
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public class CandidateViewContainer extends LinearLayout implements OnTouchListener {
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private View mButtonLeft;
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private View mButtonRight;
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private View mButtonLeftLayout;
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private View mButtonRightLayout;
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private CandidateView mCandidates;
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public CandidateViewContainer(Context screen, AttributeSet attrs) {
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super(screen, attrs);
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}
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public void initViews() {
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if (mCandidates == null) {
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mButtonLeftLayout = findViewById(R.id.candidate_left_parent);
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mButtonLeft = findViewById(R.id.candidate_left);
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if (mButtonLeft != null) {
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mButtonLeft.setOnTouchListener(this);
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}
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mButtonRightLayout = findViewById(R.id.candidate_right_parent);
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mButtonRight = findViewById(R.id.candidate_right);
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if (mButtonRight != null) {
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mButtonRight.setOnTouchListener(this);
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}
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mCandidates = (CandidateView) findViewById(R.id.candidates);
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}
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}
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@Override
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public void requestLayout() {
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if (mCandidates != null) {
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int availableWidth = mCandidates.getWidth();
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int neededWidth = mCandidates.computeHorizontalScrollRange();
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int x = mCandidates.getScrollX();
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boolean leftVisible = x > 0;
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boolean rightVisible = x + availableWidth < neededWidth;
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if (mButtonLeftLayout != null) {
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mButtonLeftLayout.setVisibility(leftVisible ? VISIBLE : GONE);
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}
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if (mButtonRightLayout != null) {
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mButtonRightLayout.setVisibility(rightVisible ? VISIBLE : GONE);
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}
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}
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super.requestLayout();
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}
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public boolean onTouch(View v, MotionEvent event) {
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if (event.getAction() == MotionEvent.ACTION_DOWN) {
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if (v == mButtonRight) {
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mCandidates.scrollNext();
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} else if (v == mButtonLeft) {
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mCandidates.scrollPrev();
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}
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}
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return false;
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}
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}
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