/*
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* Copyright (C) 2010 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.mozillaonline.providers.downloads.ui;
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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.widget.CheckBox;
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import android.widget.RelativeLayout;
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import com.mozillaonline.downloadprovider.R;
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/**
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* This class customizes RelativeLayout to directly handle clicks on the left part of the view and
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* treat them at clicks on the checkbox. This makes rapid selection of many items easier. This class
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* also keeps an ID associated with the currently displayed download and notifies a listener upon
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* selection changes with that ID.
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*/
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public class DownloadItem extends RelativeLayout {
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private static float CHECKMARK_AREA = -1;
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private boolean mIsInDownEvent = false;
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private CheckBox mCheckBox;
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private long mDownloadId;
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private DownloadSelectListener mListener;
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static interface DownloadSelectListener {
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public void onDownloadSelectionChanged(long downloadId, boolean isSelected);
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public boolean isDownloadSelected(long id);
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}
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public DownloadItem(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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initialize();
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}
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public DownloadItem(Context context, AttributeSet attrs) {
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super(context, attrs);
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initialize();
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}
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public DownloadItem(Context context) {
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super(context);
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initialize();
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}
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private void initialize() {
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if (CHECKMARK_AREA == -1) {
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CHECKMARK_AREA = getResources().getDimensionPixelSize(R.dimen.checkmark_area);
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}
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}
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@Override
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protected void onFinishInflate() {
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super.onFinishInflate();
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mCheckBox = (CheckBox) findViewById(R.id.download_checkbox);
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}
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public void setDownloadId(long downloadId) {
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mDownloadId = downloadId;
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}
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public void setSelectListener(DownloadSelectListener listener) {
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mListener = listener;
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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boolean handled = false;
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switch(event.getAction()) {
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case MotionEvent.ACTION_DOWN:
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if (event.getX() < CHECKMARK_AREA) {
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mIsInDownEvent = true;
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handled = true;
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}
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break;
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case MotionEvent.ACTION_CANCEL:
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mIsInDownEvent = false;
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break;
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case MotionEvent.ACTION_UP:
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if (mIsInDownEvent && event.getX() < CHECKMARK_AREA) {
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toggleCheckMark();
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handled = true;
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}
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mIsInDownEvent = false;
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break;
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}
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if (handled) {
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postInvalidate();
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} else {
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handled = super.onTouchEvent(event);
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}
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return handled;
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}
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private void toggleCheckMark() {
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mCheckBox.toggle();
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mListener.onDownloadSelectionChanged(mDownloadId, mCheckBox.isChecked());
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}
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}
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