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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import org.sufficientlysecure.keychain.R;
/**
* Class representing a LinearLayout that can fold and hide it's content when pressed
* To use just add the following to your xml layout
<org.sufficientlysecure.keychain.ui.widget.FoldableLinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
custom:foldedLabel="@string/TEXT_TO_DISPLAY_WHEN_FOLDED"
custom:unFoldedLabel="@string/TEXT_TO_DISPLAY_WHEN_UNFOLDED"
custom:foldedIcon="ICON_NAME_FROM_FontAwesomeText_TO_USE_WHEN_FOLDED"
custom:unFoldedIcon="ICON_NAME_FROM_FontAwesomeText_TO_USE_WHEN_UNFOLDED">
<include layout="@layout/ELEMENTS_TO_BE_FOLDED"/>
</org.sufficientlysecure.keychain.ui.widget.FoldableLinearLayout>
*/
public class FoldableLinearLayout extends LinearLayout {
private ImageButton mFoldableIcon;
private boolean mFolded;
private boolean mHasMigrated = false;
private Integer mShortAnimationDuration = null;
private TextView mFoldableTextView = null;
private LinearLayout mFoldableContainer = null;
private View mFoldableLayout = null;
private String mFoldedLabel;
private String mUnFoldedLabel;
public FoldableLinearLayout(Context context) {
super(context);
processAttributes(context, null);
}
public FoldableLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
processAttributes(context, attrs);
}
public FoldableLinearLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs);
processAttributes(context, attrs);
}
/**
* Load given attributes to inner variables,
* @param context
* @param attrs
*/
private void processAttributes(Context context, AttributeSet attrs) {
if (attrs != null) {
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.FoldableLinearLayout, 0, 0);
mFoldedLabel = a.getString(R.styleable.FoldableLinearLayout_foldedLabel);
mUnFoldedLabel = a.getString(R.styleable.FoldableLinearLayout_unFoldedLabel);
a.recycle();
}
// If any attribute isn't found then set a default one
mFoldedLabel = (mFoldedLabel == null) ? context.getString(R.id.none) : mFoldedLabel;
mUnFoldedLabel = (mUnFoldedLabel == null) ? context.getString(R.id.none) : mUnFoldedLabel;
}
@Override
protected void onFinishInflate() {
// if the migration has already happened
// there is no need to move any children
if (!mHasMigrated) {
migrateChildrenToContainer();
mHasMigrated = true;
}
initialiseInnerViews();
super.onFinishInflate();
}
/**
* Migrates Child views as declared in xml to the inner foldableContainer
*/
private void migrateChildrenToContainer() {
// Collect children of FoldableLinearLayout as declared in XML
int childNum = getChildCount();
View[] children = new View[childNum];
for (int i = 0; i < childNum; i++) {
children[i] = getChildAt(i);
}
if (children[0].getId() == R.id.foldableControl) {
}
// remove all of them from FoldableLinearLayout
detachAllViewsFromParent();
// Inflate the inner foldable_linearlayout.xml
LayoutInflater inflator = (LayoutInflater) getContext().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
mFoldableLayout = inflator.inflate(R.layout.foldable_linearlayout, this, true);
mFoldableContainer = (LinearLayout) mFoldableLayout.findViewById(R.id.foldableContainer);
// Push previously collected children into foldableContainer.
for (int i = 0; i < childNum; i++) {
addView(children[i]);
}
}
private void initialiseInnerViews() {
mFoldableIcon = (ImageButton) mFoldableLayout.findViewById(R.id.foldableIcon);
mFoldableIcon.setImageResource(R.drawable.ic_action_expand);
mFoldableTextView = (TextView) mFoldableLayout.findViewById(R.id.foldableText);
mFoldableTextView.setText(mFoldedLabel);
// retrieve and cache the system's short animation time
mShortAnimationDuration = getResources().getInteger(android.R.integer.config_shortAnimTime);
LinearLayout foldableControl = (LinearLayout) mFoldableLayout.findViewById(R.id.foldableControl);
foldableControl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mFolded = !mFolded;
if (mFolded) {
mFoldableIcon.setImageResource(R.drawable.ic_action_collapse);
mFoldableContainer.setVisibility(View.VISIBLE);
AlphaAnimation animation = new AlphaAnimation(0f, 1f);
animation.setDuration(mShortAnimationDuration);
mFoldableContainer.startAnimation(animation);
mFoldableTextView.setText(mUnFoldedLabel);
} else {
mFoldableIcon.setImageResource(R.drawable.ic_action_expand);
AlphaAnimation animation = new AlphaAnimation(1f, 0f);
animation.setDuration(mShortAnimationDuration);
animation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) { }
@Override
public void onAnimationEnd(Animation animation) {
// making sure that at the end the container is completely removed from view
mFoldableContainer.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(Animation animation) { }
});
mFoldableContainer.startAnimation(animation);
mFoldableTextView.setText(mFoldedLabel);
}
}
});
}
/**
* Adds provided child view to foldableContainer View
* @param child
*/
@Override
public void addView(View child) {
if (mFoldableContainer != null) {
mFoldableContainer.addView(child);
}
}
}
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