| /* |
| * Copyright (C) 2012 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 com.android.gallery3d.app; |
| |
| import android.content.Context; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.view.ViewGroup; |
| import android.view.animation.AlphaAnimation; |
| import android.view.animation.Animation; |
| import android.view.animation.ScaleAnimation; |
| import android.widget.RelativeLayout; |
| |
| import com.android.gallery3d.R; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class PhotoPageBottomControls implements OnClickListener { |
| public interface Delegate { |
| public boolean canDisplayBottomControls(); |
| public boolean canDisplayBottomControl(int control); |
| public void onBottomControlClicked(int control); |
| } |
| |
| private Delegate mDelegate; |
| private ViewGroup mParentLayout; |
| private ViewGroup mContainer; |
| |
| private boolean mContainerVisible = false; |
| private Map<View, Boolean> mControlsVisible = new HashMap<View, Boolean>(); |
| |
| private Animation mContainerAnimIn = new AlphaAnimation(0f, 1f); |
| private Animation mContainerAnimOut = new AlphaAnimation(1f, 0f); |
| private static final int CONTAINER_ANIM_DURATION_MS = 200; |
| |
| private static final int CONTROL_ANIM_DURATION_MS = 150; |
| private static Animation getControlAnimForVisibility(boolean visible) { |
| Animation anim = visible ? new AlphaAnimation(0f, 1f) |
| : new AlphaAnimation(1f, 0f); |
| anim.setDuration(CONTROL_ANIM_DURATION_MS); |
| return anim; |
| } |
| |
| public PhotoPageBottomControls(Delegate delegate, Context context, RelativeLayout layout) { |
| mDelegate = delegate; |
| mParentLayout = layout; |
| |
| LayoutInflater inflater = (LayoutInflater) context |
| .getSystemService(Context.LAYOUT_INFLATER_SERVICE); |
| mContainer = (ViewGroup) inflater |
| .inflate(R.layout.photopage_bottom_controls, mParentLayout, false); |
| mParentLayout.addView(mContainer); |
| |
| for (int i = mContainer.getChildCount() - 1; i >= 0; i--) { |
| View child = mContainer.getChildAt(i); |
| child.setOnClickListener(this); |
| mControlsVisible.put(child, false); |
| } |
| |
| mContainerAnimIn.setDuration(CONTAINER_ANIM_DURATION_MS); |
| mContainerAnimOut.setDuration(CONTAINER_ANIM_DURATION_MS); |
| |
| refresh(); |
| } |
| |
| private void hide() { |
| mContainer.clearAnimation(); |
| mContainerAnimOut.reset(); |
| mContainer.startAnimation(mContainerAnimOut); |
| mContainer.setVisibility(View.INVISIBLE); |
| } |
| |
| private void show() { |
| mContainer.clearAnimation(); |
| mContainerAnimIn.reset(); |
| mContainer.startAnimation(mContainerAnimIn); |
| mContainer.setVisibility(View.VISIBLE); |
| } |
| |
| public void refresh() { |
| boolean visible = mDelegate.canDisplayBottomControls(); |
| boolean containerVisibilityChanged = (visible != mContainerVisible); |
| if (containerVisibilityChanged) { |
| if (visible) { |
| show(); |
| } else { |
| hide(); |
| } |
| mContainerVisible = visible; |
| } |
| if (!mContainerVisible) { |
| return; |
| } |
| for (View control : mControlsVisible.keySet()) { |
| Boolean prevVisibility = mControlsVisible.get(control); |
| boolean curVisibility = mDelegate.canDisplayBottomControl(control.getId()); |
| if (prevVisibility.booleanValue() != curVisibility) { |
| if (!containerVisibilityChanged) { |
| control.clearAnimation(); |
| control.startAnimation(getControlAnimForVisibility(curVisibility)); |
| } |
| control.setVisibility(curVisibility ? View.VISIBLE : View.INVISIBLE); |
| mControlsVisible.put(control, curVisibility); |
| } |
| } |
| } |
| |
| public void cleanup() { |
| mParentLayout.removeView(mContainer); |
| mControlsVisible.clear(); |
| } |
| |
| @Override |
| public void onClick(View view) { |
| if (mContainerVisible && mControlsVisible.get(view).booleanValue()) { |
| mDelegate.onBottomControlClicked(view.getId()); |
| } |
| } |
| } |