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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 android.webkit;
import android.content.Context;
import android.os.Handler;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.View.OnClickListener;
import android.view.animation.AlphaAnimation;
import android.widget.FrameLayout;
@Deprecated
class ZoomControlExternal implements ZoomControlBase {
// The time that the external controls are visible before fading away
private static final long ZOOM_CONTROLS_TIMEOUT =
ViewConfiguration.getZoomControlsTimeout();
// The view containing the external zoom controls
private ExtendedZoomControls mZoomControls;
private Runnable mZoomControlRunnable;
private final Handler mPrivateHandler = new Handler();
private final WebViewClassic mWebView;
public ZoomControlExternal(WebViewClassic webView) {
mWebView = webView;
}
public void show() {
if(mZoomControlRunnable != null) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
}
getControls().show(true);
mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT);
}
public void hide() {
if (mZoomControlRunnable != null) {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
}
if (mZoomControls != null) {
mZoomControls.hide();
}
}
public boolean isVisible() {
return mZoomControls != null && mZoomControls.isShown();
}
public void update() { }
public ExtendedZoomControls getControls() {
if (mZoomControls == null) {
mZoomControls = createZoomControls();
/*
* need to be set to VISIBLE first so that getMeasuredHeight() in
* {@link #onSizeChanged()} can return the measured value for proper
* layout.
*/
mZoomControls.setVisibility(View.VISIBLE);
mZoomControlRunnable = new Runnable() {
public void run() {
/* Don't dismiss the controls if the user has
* focus on them. Wait and check again later.
*/
if (!mZoomControls.hasFocus()) {
mZoomControls.hide();
} else {
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable,
ZOOM_CONTROLS_TIMEOUT);
}
}
};
}
return mZoomControls;
}
private ExtendedZoomControls createZoomControls() {
ExtendedZoomControls zoomControls = new ExtendedZoomControls(mWebView.getContext());
zoomControls.setOnZoomInClickListener(new OnClickListener() {
public void onClick(View v) {
// reset time out
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT);
mWebView.zoomIn();
}
});
zoomControls.setOnZoomOutClickListener(new OnClickListener() {
public void onClick(View v) {
// reset time out
mPrivateHandler.removeCallbacks(mZoomControlRunnable);
mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT);
mWebView.zoomOut();
}
});
return zoomControls;
}
private static class ExtendedZoomControls extends FrameLayout {
private android.widget.ZoomControls mPlusMinusZoomControls;
public ExtendedZoomControls(Context context) {
super(context, null);
LayoutInflater inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(com.android.internal.R.layout.zoom_magnify, this, true);
mPlusMinusZoomControls = (android.widget.ZoomControls) findViewById(
com.android.internal.R.id.zoomControls);
findViewById(com.android.internal.R.id.zoomMagnify).setVisibility(
View.GONE);
}
public void show(boolean showZoom) {
mPlusMinusZoomControls.setVisibility(showZoom ? View.VISIBLE : View.GONE);
fade(View.VISIBLE, 0.0f, 1.0f);
}
public void hide() {
fade(View.GONE, 1.0f, 0.0f);
}
private void fade(int visibility, float startAlpha, float endAlpha) {
AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha);
anim.setDuration(500);
startAnimation(anim);
setVisibility(visibility);
}
public boolean hasFocus() {
return mPlusMinusZoomControls.hasFocus();
}
public void setOnZoomInClickListener(OnClickListener listener) {
mPlusMinusZoomControls.setOnZoomInClickListener(listener);
}
public void setOnZoomOutClickListener(OnClickListener listener) {
mPlusMinusZoomControls.setOnZoomOutClickListener(listener);
}
}
}
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