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/*
* Copyright (C) 2017 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.setupwizardlib.template;
import android.content.res.ColorStateList;
import android.os.Build;
import android.os.Build.VERSION_CODES;
import android.view.View;
import android.view.ViewStub;
import android.widget.ProgressBar;
import androidx.annotation.Nullable;
import com.android.setupwizardlib.R;
import com.android.setupwizardlib.TemplateLayout;
/**
* A {@link Mixin} for showing a progress bar.
*/
public class ProgressBarMixin implements Mixin {
private TemplateLayout mTemplateLayout;
@Nullable
private ColorStateList mColor;
/**
* @param layout The layout this mixin belongs to.
*/
public ProgressBarMixin(TemplateLayout layout) {
mTemplateLayout = layout;
}
/**
* @return True if the progress bar is currently shown.
*/
public boolean isShown() {
final View progressBar = mTemplateLayout.findManagedViewById(R.id.suw_layout_progress);
return progressBar != null && progressBar.getVisibility() == View.VISIBLE;
}
/**
* Sets whether the progress bar is shown. If the progress bar has not been inflated from the
* stub, this method will inflate the progress bar.
*
* @param shown True to show the progress bar, false to hide it.
*/
public void setShown(boolean shown) {
if (shown) {
View progressBar = getProgressBar();
if (progressBar != null) {
progressBar.setVisibility(View.VISIBLE);
}
} else {
View progressBar = peekProgressBar();
if (progressBar != null) {
progressBar.setVisibility(View.GONE);
}
}
}
/**
* Gets the progress bar in the layout. If the progress bar has not been used before, it will be
* installed (i.e. inflated from its view stub).
*
* @return The progress bar of this layout. May be null only if the template used doesn't have a
* progress bar built-in.
*/
private ProgressBar getProgressBar() {
final View progressBar = peekProgressBar();
if (progressBar == null) {
final ViewStub progressBarStub =
(ViewStub) mTemplateLayout.findManagedViewById(R.id.suw_layout_progress_stub);
if (progressBarStub != null) {
progressBarStub.inflate();
}
setColor(mColor);
}
return peekProgressBar();
}
/**
* Gets the progress bar in the layout only if it has been installed.
* {@link #setShown(boolean)} should be called before this to ensure the progress bar
* is set up correctly.
*
* @return The progress bar of this layout, or null if the progress bar is not installed. The
* null case can happen either if {@link #setShown(boolean)} with true was
* not called before this, or if the template does not contain a progress bar.
*/
public ProgressBar peekProgressBar() {
return (ProgressBar) mTemplateLayout.findManagedViewById(R.id.suw_layout_progress);
}
/**
* Sets the color of the indeterminate progress bar. This method is a no-op on SDK < 21.
*/
public void setColor(@Nullable ColorStateList color) {
mColor = color;
if (Build.VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
final ProgressBar bar = peekProgressBar();
if (bar != null) {
bar.setIndeterminateTintList(color);
if (Build.VERSION.SDK_INT >= VERSION_CODES.M || color != null) {
// There is a bug in Lollipop where setting the progress tint color to null
// will crash with "java.lang.NullPointerException: Attempt to invoke virtual
// method 'int android.graphics.Paint.getAlpha()' on a null object reference"
// at android.graphics.drawable.NinePatchDrawable.draw(:250)
// The bug doesn't affect ProgressBar on M because it uses ShapeDrawable instead
// of NinePatchDrawable. (commit 6a8253fdc9f4574c28b4beeeed90580ffc93734a)
bar.setProgressBackgroundTintList(color);
}
}
}
}
/**
* @return The color previously set in {@link #setColor(ColorStateList)}, or null if the color
* is not set. In case of null, the color of the progress bar will be inherited from the theme.
*/
@Nullable
public ColorStateList getColor() {
return mColor;
}
}
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