| /* |
| * Copyright (C) 2008 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.widget; |
| |
| import android.annotation.Widget; |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.LayoutInflater; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| import android.view.animation.AlphaAnimation; |
| |
| import com.android.internal.R; |
| |
| |
| /** |
| * The {@code ZoomControls} class displays a simple set of controls used for zooming and |
| * provides callbacks to register for events. */ |
| @Widget |
| public class ZoomControls extends LinearLayout { |
| |
| private final ZoomButton mZoomIn; |
| private final ZoomButton mZoomOut; |
| |
| public ZoomControls(Context context) { |
| this(context, null); |
| } |
| |
| public ZoomControls(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| setFocusable(false); |
| |
| LayoutInflater inflater = (LayoutInflater) context |
| .getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| inflater.inflate(R.layout.zoom_controls, this, // we are the parent |
| true); |
| |
| mZoomIn = (ZoomButton) findViewById(R.id.zoomIn); |
| mZoomOut = (ZoomButton) findViewById(R.id.zoomOut); |
| } |
| |
| public void setOnZoomInClickListener(OnClickListener listener) { |
| mZoomIn.setOnClickListener(listener); |
| } |
| |
| public void setOnZoomOutClickListener(OnClickListener listener) { |
| mZoomOut.setOnClickListener(listener); |
| } |
| |
| /* |
| * Sets how fast you get zoom events when the user holds down the |
| * zoom in/out buttons. |
| */ |
| public void setZoomSpeed(long speed) { |
| mZoomIn.setZoomSpeed(speed); |
| mZoomOut.setZoomSpeed(speed); |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| |
| /* Consume all touch events so they don't get dispatched to the view |
| * beneath this view. |
| */ |
| return true; |
| } |
| |
| public void show() { |
| 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 void setIsZoomInEnabled(boolean isEnabled) { |
| mZoomIn.setEnabled(isEnabled); |
| } |
| |
| public void setIsZoomOutEnabled(boolean isEnabled) { |
| mZoomOut.setEnabled(isEnabled); |
| } |
| |
| @Override |
| public boolean hasFocus() { |
| return mZoomIn.hasFocus() || mZoomOut.hasFocus(); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| super.onInitializeAccessibilityEvent(event); |
| event.setClassName(ZoomControls.class.getName()); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfo(info); |
| info.setClassName(ZoomControls.class.getName()); |
| } |
| } |