174 lines
6.1 KiB
Java
174 lines
6.1 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.setupwizardlib.view;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Color;
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import android.graphics.drawable.Drawable;
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import android.os.Build.VERSION;
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import android.os.Build.VERSION_CODES;
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import android.text.TextUtils;
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import android.util.AttributeSet;
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import android.view.ContextThemeWrapper;
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import android.view.View;
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import android.widget.Button;
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import android.widget.LinearLayout;
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import com.android.setupwizardlib.R;
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public class NavigationBar extends LinearLayout implements View.OnClickListener {
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public interface NavigationBarListener {
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void onNavigateBack();
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void onNavigateNext();
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}
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private static int getNavbarTheme(Context context) {
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// Normally we can automatically guess the theme by comparing the foreground color against
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// the background color. But we also allow specifying explicitly using suwNavBarTheme.
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TypedArray attributes = context.obtainStyledAttributes(
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new int[] {
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R.attr.suwNavBarTheme,
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android.R.attr.colorForeground,
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android.R.attr.colorBackground });
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int theme = attributes.getResourceId(0, 0);
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if (theme == 0) {
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// Compare the value of the foreground against the background color to see if current
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// theme is light-on-dark or dark-on-light.
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float[] foregroundHsv = new float[3];
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float[] backgroundHsv = new float[3];
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Color.colorToHSV(attributes.getColor(1, 0), foregroundHsv);
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Color.colorToHSV(attributes.getColor(2, 0), backgroundHsv);
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boolean isDarkBg = foregroundHsv[2] > backgroundHsv[2];
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theme = isDarkBg ? R.style.SuwNavBarThemeDark : R.style.SuwNavBarThemeLight;
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}
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attributes.recycle();
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return theme;
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}
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private static Context getThemedContext(Context context) {
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final int theme = getNavbarTheme(context);
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return new ContextThemeWrapper(context, theme);
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}
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private Button mNextButton;
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private Button mBackButton;
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private Button mMoreButton;
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private NavigationBarListener mListener;
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public NavigationBar(Context context) {
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super(getThemedContext(context));
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init();
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}
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public NavigationBar(Context context, AttributeSet attrs) {
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super(getThemedContext(context), attrs);
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init();
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}
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@TargetApi(VERSION_CODES.HONEYCOMB)
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public NavigationBar(Context context, AttributeSet attrs, int defStyleAttr) {
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super(getThemedContext(context), attrs, defStyleAttr);
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init();
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}
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// All the constructors delegate to this init method. The 3-argument constructor is not
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// available in LinearLayout before v11, so call super with the exact same arguments.
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private void init() {
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View.inflate(getContext(), R.layout.suw_navbar_view, this);
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mNextButton = (Button) findViewById(R.id.suw_navbar_next);
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mBackButton = (Button) findViewById(R.id.suw_navbar_back);
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mMoreButton = (Button) findViewById(R.id.suw_navbar_more);
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}
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public Button getBackButton() {
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return mBackButton;
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}
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public Button getNextButton() {
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return mNextButton;
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}
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public Button getMoreButton() {
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return mMoreButton;
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}
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public void setNavigationBarListener(NavigationBarListener listener) {
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mListener = listener;
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if (mListener != null) {
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getBackButton().setOnClickListener(this);
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getNextButton().setOnClickListener(this);
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}
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}
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@Override
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public void onClick(View view) {
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if (mListener != null) {
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if (view == getBackButton()) {
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mListener.onNavigateBack();
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} else if (view == getNextButton()) {
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mListener.onNavigateNext();
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}
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}
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}
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public static class NavButton extends Button {
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public NavButton(Context context) {
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super(context);
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}
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public NavButton(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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@Override
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public void setEnabled(boolean enabled) {
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super.setEnabled(enabled);
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// The color of the button is #de000000 / #deffffff when enabled. When disabled, the
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// alpha value = 0x3b/0xff * 0xde/0xff = 20%.
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final int alpha = enabled ? 0xff : 0x3b;
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setTextColor(getTextColors().withAlpha(alpha));
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if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) {
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final Drawable[] relativeDrawables = getCompoundDrawablesRelative();
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for (Drawable d : relativeDrawables) {
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if (d != null) {
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d.mutate().setAlpha(alpha);
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}
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}
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}
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final Drawable[] compoundDrawables = getCompoundDrawables();
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for (Drawable d : compoundDrawables) {
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if (d != null) {
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d.mutate().setAlpha(alpha);
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}
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}
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}
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@Override
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protected void onTextChanged(CharSequence text, int start, int lengthBefore,
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int lengthAfter) {
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super.onTextChanged(text, start, lengthBefore, lengthAfter);
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setCompoundDrawablePadding(TextUtils.isEmpty(text) ? 0 : getResources()
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.getDimensionPixelSize(R.dimen.suw_navbar_button_drawable_padding));
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}
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}
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}
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