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/*
* 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());
}
}
}
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