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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.contacts.common.util;
import android.content.res.Resources;
import android.graphics.Outline;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewOutlineProvider;
import android.widget.ListView;
import com.android.contacts.common.R;
/**
* Provides static functions to work with views
*/
public class ViewUtil {
private ViewUtil() {}
/**
* Returns the width as specified in the LayoutParams
* @throws IllegalStateException Thrown if the view's width is unknown before a layout pass
* s
*/
public static int getConstantPreLayoutWidth(View view) {
// We haven't been layed out yet, so get the size from the LayoutParams
final ViewGroup.LayoutParams p = view.getLayoutParams();
if (p.width < 0) {
throw new IllegalStateException("Expecting view's width to be a constant rather " +
"than a result of the layout pass");
}
return p.width;
}
/**
* Returns a boolean indicating whether or not the view's layout direction is RTL
*
* @param view - A valid view
* @return True if the view's layout direction is RTL
*/
public static boolean isViewLayoutRtl(View view) {
return view.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
}
private static final ViewOutlineProvider OVAL_OUTLINE_PROVIDER = new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
outline.setOval(0, 0, view.getWidth(), view.getHeight());
}
};
/**
* Configures the floating action button, clipping it to a circle and setting its translation z.
* @param view The float action button's view.
* @param res The resources file.
*/
public static void setupFloatingActionButton(View view, Resources res) {
view.setOutlineProvider(OVAL_OUTLINE_PROVIDER);
view.setTranslationZ(
res.getDimensionPixelSize(R.dimen.floating_action_button_translation_z));
}
/**
* Adds padding to the bottom of the given {@link ListView} so that the floating action button
* does not obscure any content.
*
* @param listView to add the padding to
* @param res valid resources object
*/
public static void addBottomPaddingToListViewForFab(ListView listView, Resources res) {
final int fabPadding = res.getDimensionPixelSize(
R.dimen.floating_action_button_list_bottom_padding);
listView.setPaddingRelative(listView.getPaddingStart(), listView.getPaddingTop(),
listView.getPaddingEnd(), listView.getPaddingBottom() + fabPadding);
listView.setClipToPadding(false);
}
}
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