| /* |
| * Copyright (C) 2008 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.internal.widget; |
| |
| import android.content.Context; |
| import android.os.SystemClock; |
| import android.util.AttributeSet; |
| import android.view.Gravity; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.Chronometer; |
| import android.widget.Chronometer.OnChronometerTickListener; |
| import android.widget.ProgressBar; |
| import android.widget.RelativeLayout; |
| import android.widget.RemoteViews.RemoteView; |
| |
| /** |
| * Container that links together a {@link ProgressBar} and {@link Chronometer} |
| * as children. It subscribes to {@link Chronometer#OnChronometerTickListener} |
| * and updates the {@link ProgressBar} based on a preset finishing time. |
| * <p> |
| * This widget expects to contain two children with specific ids |
| * {@link android.R.id.progress} and {@link android.R.id.text1}. |
| * <p> |
| * If the {@link Chronometer} {@link android.R.attr#layout_width} is |
| * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT}, then the |
| * {@link android.R.attr#gravity} will be used to automatically move it with |
| * respect to the {@link ProgressBar} position. For example, if |
| * {@link android.view.Gravity#LEFT} then the {@link Chronometer} will be placed |
| * just ahead of the leading edge of the {@link ProgressBar} position. |
| */ |
| @RemoteView |
| public class TextProgressBar extends RelativeLayout implements OnChronometerTickListener { |
| public static final String TAG = "TextProgressBar"; |
| |
| static final int CHRONOMETER_ID = android.R.id.text1; |
| static final int PROGRESSBAR_ID = android.R.id.progress; |
| |
| Chronometer mChronometer = null; |
| ProgressBar mProgressBar = null; |
| |
| long mDurationBase = -1; |
| int mDuration = -1; |
| |
| boolean mChronometerFollow = false; |
| int mChronometerGravity = Gravity.NO_GRAVITY; |
| |
| public TextProgressBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| public TextProgressBar(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| } |
| |
| public TextProgressBar(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| public TextProgressBar(Context context) { |
| super(context); |
| } |
| |
| /** |
| * Catch any interesting children when they are added. |
| */ |
| @Override |
| public void addView(View child, int index, ViewGroup.LayoutParams params) { |
| super.addView(child, index, params); |
| |
| int childId = child.getId(); |
| if (childId == CHRONOMETER_ID && child instanceof Chronometer) { |
| mChronometer = (Chronometer) child; |
| mChronometer.setOnChronometerTickListener(this); |
| |
| // Check if Chronometer should move with with ProgressBar |
| mChronometerFollow = (params.width == ViewGroup.LayoutParams.WRAP_CONTENT); |
| mChronometerGravity = (mChronometer.getGravity() & |
| Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK); |
| |
| } else if (childId == PROGRESSBAR_ID && child instanceof ProgressBar) { |
| mProgressBar = (ProgressBar) child; |
| } |
| } |
| |
| /** |
| * Set the expected termination time of the running {@link Chronometer}. |
| * This value is used to adjust the {@link ProgressBar} against the elapsed |
| * time. |
| * <p> |
| * Call this <b>after</b> adjusting the {@link Chronometer} base, if |
| * necessary. |
| * |
| * @param durationBase Use the {@link SystemClock#elapsedRealtime} time |
| * base. |
| */ |
| @android.view.RemotableViewMethod |
| public void setDurationBase(long durationBase) { |
| mDurationBase = durationBase; |
| |
| if (mProgressBar == null || mChronometer == null) { |
| throw new RuntimeException("Expecting child ProgressBar with id " + |
| "'android.R.id.progress' and Chronometer id 'android.R.id.text1'"); |
| } |
| |
| // Update the ProgressBar maximum relative to Chronometer base |
| mDuration = (int) (durationBase - mChronometer.getBase()); |
| if (mDuration <= 0) { |
| mDuration = 1; |
| } |
| mProgressBar.setMax(mDuration); |
| } |
| |
| /** |
| * Callback when {@link Chronometer} changes, indicating that we should |
| * update the {@link ProgressBar} and change the layout if necessary. |
| */ |
| public void onChronometerTick(Chronometer chronometer) { |
| if (mProgressBar == null) { |
| throw new RuntimeException( |
| "Expecting child ProgressBar with id 'android.R.id.progress'"); |
| } |
| |
| // Stop Chronometer if we're past duration |
| long now = SystemClock.elapsedRealtime(); |
| if (now >= mDurationBase) { |
| mChronometer.stop(); |
| } |
| |
| // Update the ProgressBar status |
| int remaining = (int) (mDurationBase - now); |
| mProgressBar.setProgress(mDuration - remaining); |
| |
| // Move the Chronometer if gravity is set correctly |
| if (mChronometerFollow) { |
| RelativeLayout.LayoutParams params; |
| |
| // Calculate estimate of ProgressBar leading edge position |
| params = (RelativeLayout.LayoutParams) mProgressBar.getLayoutParams(); |
| int contentWidth = mProgressBar.getWidth() - (params.leftMargin + params.rightMargin); |
| int leadingEdge = ((contentWidth * mProgressBar.getProgress()) / |
| mProgressBar.getMax()) + params.leftMargin; |
| |
| // Calculate any adjustment based on gravity |
| int adjustLeft = 0; |
| int textWidth = mChronometer.getWidth(); |
| if (mChronometerGravity == Gravity.END) { |
| adjustLeft = -textWidth; |
| } else if (mChronometerGravity == Gravity.CENTER_HORIZONTAL) { |
| adjustLeft = -(textWidth / 2); |
| } |
| |
| // Limit margin to keep text inside ProgressBar bounds |
| leadingEdge += adjustLeft; |
| int rightLimit = contentWidth - params.rightMargin - textWidth; |
| if (leadingEdge < params.leftMargin) { |
| leadingEdge = params.leftMargin; |
| } else if (leadingEdge > rightLimit) { |
| leadingEdge = rightLimit; |
| } |
| |
| params = (RelativeLayout.LayoutParams) mChronometer.getLayoutParams(); |
| params.leftMargin = leadingEdge; |
| |
| // Request layout to move Chronometer |
| mChronometer.requestLayout(); |
| |
| } |
| } |
| } |