1 /* 2 * Copyright (C) 2012 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 17 package com.android.gallery3d.app; 18 19 import android.content.Context; 20 import android.view.LayoutInflater; 21 import android.view.View; 22 import android.view.View.OnClickListener; 23 import android.view.ViewGroup; 24 import android.view.animation.AlphaAnimation; 25 import android.view.animation.Animation; 26 import android.widget.RelativeLayout; 27 28 import com.android.gallery3d.R; 29 30 import java.util.HashMap; 31 import java.util.Map; 32 33 public class PhotoPageBottomControls implements OnClickListener { 34 public interface Delegate { canDisplayBottomControls()35 public boolean canDisplayBottomControls(); canDisplayBottomControl(int control)36 public boolean canDisplayBottomControl(int control); onBottomControlClicked(int control)37 public void onBottomControlClicked(int control); refreshBottomControlsWhenReady()38 public void refreshBottomControlsWhenReady(); 39 } 40 41 private Delegate mDelegate; 42 private ViewGroup mParentLayout; 43 private ViewGroup mContainer; 44 45 private boolean mContainerVisible = false; 46 private Map<View, Boolean> mControlsVisible = new HashMap<View, Boolean>(); 47 48 private Animation mContainerAnimIn = new AlphaAnimation(0f, 1f); 49 private Animation mContainerAnimOut = new AlphaAnimation(1f, 0f); 50 private static final int CONTAINER_ANIM_DURATION_MS = 200; 51 52 private static final int CONTROL_ANIM_DURATION_MS = 150; getControlAnimForVisibility(boolean visible)53 private static Animation getControlAnimForVisibility(boolean visible) { 54 Animation anim = visible ? new AlphaAnimation(0f, 1f) 55 : new AlphaAnimation(1f, 0f); 56 anim.setDuration(CONTROL_ANIM_DURATION_MS); 57 return anim; 58 } 59 PhotoPageBottomControls(Delegate delegate, Context context, RelativeLayout layout)60 public PhotoPageBottomControls(Delegate delegate, Context context, RelativeLayout layout) { 61 mDelegate = delegate; 62 mParentLayout = layout; 63 64 LayoutInflater inflater = (LayoutInflater) context 65 .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 66 mContainer = (ViewGroup) inflater 67 .inflate(R.layout.photopage_bottom_controls, mParentLayout, false); 68 mParentLayout.addView(mContainer); 69 70 for (int i = mContainer.getChildCount() - 1; i >= 0; i--) { 71 View child = mContainer.getChildAt(i); 72 child.setOnClickListener(this); 73 mControlsVisible.put(child, false); 74 } 75 76 mContainerAnimIn.setDuration(CONTAINER_ANIM_DURATION_MS); 77 mContainerAnimOut.setDuration(CONTAINER_ANIM_DURATION_MS); 78 79 mDelegate.refreshBottomControlsWhenReady(); 80 } 81 hide()82 private void hide() { 83 mContainer.clearAnimation(); 84 mContainerAnimOut.reset(); 85 mContainer.startAnimation(mContainerAnimOut); 86 mContainer.setVisibility(View.INVISIBLE); 87 } 88 show()89 private void show() { 90 mContainer.clearAnimation(); 91 mContainerAnimIn.reset(); 92 mContainer.startAnimation(mContainerAnimIn); 93 mContainer.setVisibility(View.VISIBLE); 94 } 95 refresh()96 public void refresh() { 97 boolean visible = mDelegate.canDisplayBottomControls(); 98 boolean containerVisibilityChanged = (visible != mContainerVisible); 99 if (containerVisibilityChanged) { 100 if (visible) { 101 show(); 102 } else { 103 hide(); 104 } 105 mContainerVisible = visible; 106 } 107 if (!mContainerVisible) { 108 return; 109 } 110 for (View control : mControlsVisible.keySet()) { 111 Boolean prevVisibility = mControlsVisible.get(control); 112 boolean curVisibility = mDelegate.canDisplayBottomControl(control.getId()); 113 if (prevVisibility.booleanValue() != curVisibility) { 114 if (!containerVisibilityChanged) { 115 control.clearAnimation(); 116 control.startAnimation(getControlAnimForVisibility(curVisibility)); 117 } 118 control.setVisibility(curVisibility ? View.VISIBLE : View.INVISIBLE); 119 mControlsVisible.put(control, curVisibility); 120 } 121 } 122 // Force a layout change 123 mContainer.requestLayout(); // Kick framework to draw the control. 124 } 125 cleanup()126 public void cleanup() { 127 mParentLayout.removeView(mContainer); 128 mControlsVisible.clear(); 129 } 130 131 @Override onClick(View view)132 public void onClick(View view) { 133 Boolean controlVisible = mControlsVisible.get(view); 134 if (mContainerVisible && controlVisible != null && controlVisible.booleanValue()) { 135 mDelegate.onBottomControlClicked(view.getId()); 136 } 137 } 138 } 139