1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.webkit; 17 18 import android.content.Context; 19 import android.os.Handler; 20 import android.view.LayoutInflater; 21 import android.view.View; 22 import android.view.ViewConfiguration; 23 import android.view.View.OnClickListener; 24 import android.view.animation.AlphaAnimation; 25 import android.widget.FrameLayout; 26 27 @Deprecated 28 class ZoomControlExternal implements ZoomControlBase { 29 30 // The time that the external controls are visible before fading away 31 private static final long ZOOM_CONTROLS_TIMEOUT = 32 ViewConfiguration.getZoomControlsTimeout(); 33 // The view containing the external zoom controls 34 private ExtendedZoomControls mZoomControls; 35 private Runnable mZoomControlRunnable; 36 private final Handler mPrivateHandler = new Handler(); 37 38 private final WebViewClassic mWebView; 39 ZoomControlExternal(WebViewClassic webView)40 public ZoomControlExternal(WebViewClassic webView) { 41 mWebView = webView; 42 } 43 show()44 public void show() { 45 if(mZoomControlRunnable != null) { 46 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 47 } 48 getControls().show(true); 49 mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT); 50 } 51 hide()52 public void hide() { 53 if (mZoomControlRunnable != null) { 54 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 55 } 56 if (mZoomControls != null) { 57 mZoomControls.hide(); 58 } 59 } 60 isVisible()61 public boolean isVisible() { 62 return mZoomControls != null && mZoomControls.isShown(); 63 } 64 update()65 public void update() { } 66 getControls()67 public ExtendedZoomControls getControls() { 68 if (mZoomControls == null) { 69 mZoomControls = createZoomControls(); 70 71 /* 72 * need to be set to VISIBLE first so that getMeasuredHeight() in 73 * {@link #onSizeChanged()} can return the measured value for proper 74 * layout. 75 */ 76 mZoomControls.setVisibility(View.VISIBLE); 77 mZoomControlRunnable = new Runnable() { 78 public void run() { 79 /* Don't dismiss the controls if the user has 80 * focus on them. Wait and check again later. 81 */ 82 if (!mZoomControls.hasFocus()) { 83 mZoomControls.hide(); 84 } else { 85 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 86 mPrivateHandler.postDelayed(mZoomControlRunnable, 87 ZOOM_CONTROLS_TIMEOUT); 88 } 89 } 90 }; 91 } 92 return mZoomControls; 93 } 94 createZoomControls()95 private ExtendedZoomControls createZoomControls() { 96 ExtendedZoomControls zoomControls = new ExtendedZoomControls(mWebView.getContext()); 97 zoomControls.setOnZoomInClickListener(new OnClickListener() { 98 public void onClick(View v) { 99 // reset time out 100 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 101 mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT); 102 mWebView.zoomIn(); 103 } 104 }); 105 zoomControls.setOnZoomOutClickListener(new OnClickListener() { 106 public void onClick(View v) { 107 // reset time out 108 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 109 mPrivateHandler.postDelayed(mZoomControlRunnable, ZOOM_CONTROLS_TIMEOUT); 110 mWebView.zoomOut(); 111 } 112 }); 113 return zoomControls; 114 } 115 116 private static class ExtendedZoomControls extends FrameLayout { 117 118 private android.widget.ZoomControls mPlusMinusZoomControls; 119 ExtendedZoomControls(Context context)120 public ExtendedZoomControls(Context context) { 121 super(context, null); 122 LayoutInflater inflater = (LayoutInflater) 123 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 124 inflater.inflate(com.android.internal.R.layout.zoom_magnify, this, true); 125 mPlusMinusZoomControls = (android.widget.ZoomControls) findViewById( 126 com.android.internal.R.id.zoomControls); 127 findViewById(com.android.internal.R.id.zoomMagnify).setVisibility( 128 View.GONE); 129 } 130 show(boolean showZoom)131 public void show(boolean showZoom) { 132 mPlusMinusZoomControls.setVisibility(showZoom ? View.VISIBLE : View.GONE); 133 fade(View.VISIBLE, 0.0f, 1.0f); 134 } 135 hide()136 public void hide() { 137 fade(View.GONE, 1.0f, 0.0f); 138 } 139 fade(int visibility, float startAlpha, float endAlpha)140 private void fade(int visibility, float startAlpha, float endAlpha) { 141 AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha); 142 anim.setDuration(500); 143 startAnimation(anim); 144 setVisibility(visibility); 145 } 146 hasFocus()147 public boolean hasFocus() { 148 return mPlusMinusZoomControls.hasFocus(); 149 } 150 setOnZoomInClickListener(OnClickListener listener)151 public void setOnZoomInClickListener(OnClickListener listener) { 152 mPlusMinusZoomControls.setOnZoomInClickListener(listener); 153 } 154 setOnZoomOutClickListener(OnClickListener listener)155 public void setOnZoomOutClickListener(OnClickListener listener) { 156 mPlusMinusZoomControls.setOnZoomOutClickListener(listener); 157 } 158 } 159 } 160