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/*
* Copyright (C) 2010 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.browser;
import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.View;
import android.webkit.WebView;
import java.util.Map;
/**
* Manage WebView scroll events
*/
public class BrowserWebView extends WebView {
public interface OnScrollChangedListener {
void onScrollChanged(int l, int t, int oldl, int oldt);
}
private boolean mBackgroundRemoved = false;
private TitleBar mTitleBar;
private OnScrollChangedListener mOnScrollChangedListener;
/**
* @param context
* @param attrs
* @param defStyle
* @param javascriptInterfaces
*/
public BrowserWebView(Context context, AttributeSet attrs, int defStyle,
Map<String, Object> javascriptInterfaces, boolean privateBrowsing) {
super(context, attrs, defStyle, javascriptInterfaces, privateBrowsing);
}
/**
* @param context
* @param attrs
* @param defStyle
*/
public BrowserWebView(
Context context, AttributeSet attrs, int defStyle, boolean privateBrowsing) {
super(context, attrs, defStyle, privateBrowsing);
}
/**
* @param context
* @param attrs
*/
public BrowserWebView(Context context, AttributeSet attrs) {
super(context, attrs);
}
/**
* @param context
*/
public BrowserWebView(Context context) {
super(context);
}
@Override
protected int getTitleHeight() {
return (mTitleBar != null) ? mTitleBar.getEmbeddedHeight() : 0;
}
void hideEmbeddedTitleBar() {
scrollBy(0, getVisibleTitleHeight());
}
@Override
public void setEmbeddedTitleBar(final View title) {
super.setEmbeddedTitleBar(title);
mTitleBar = (TitleBar) title;
}
public boolean hasTitleBar() {
return (mTitleBar != null);
}
@Override
protected void onDraw(Canvas c) {
super.onDraw(c);
if (!mBackgroundRemoved && getRootView().getBackground() != null) {
mBackgroundRemoved = true;
post(new Runnable() {
public void run() {
getRootView().setBackgroundDrawable(null);
}
});
}
}
public void drawContent(Canvas c) {
onDraw(c);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
if (mOnScrollChangedListener != null) {
mOnScrollChangedListener.onScrollChanged(l, t, oldl, oldt);
}
}
public void setOnScrollChangedListener(OnScrollChangedListener listener) {
mOnScrollChangedListener = listener;
}
@Override
public boolean showContextMenuForChild(View originalView) {
return false;
}
}
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