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 interface ZoomControlBase { 19 20 /** 21 * Causes the on-screen zoom control to be made visible 22 */ 23 public void show(); 24 25 /** 26 * Causes the on-screen zoom control to disappear 27 */ 28 public void hide(); 29 30 /** 31 * Enables the control to update its state if necessary in response to a 32 * change in the pages zoom level. For example, if the max zoom level is 33 * reached then the control can disable the button for zooming in. 34 */ 35 public void update(); 36 37 /** 38 * Checks to see if the control is currently visible to the user. 39 */ 40 public boolean isVisible(); 41 } 42
