| /** |
| * Copyright (c) 2011, Google Inc. |
| * |
| * 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.mail; |
| |
| import android.app.ProgressDialog; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.DialogInterface.OnShowListener; |
| import android.os.Handler; |
| |
| /** |
| * MinTimeProgressDialog implements a ProgressDialog that waits MIN_DELAY ms to |
| * be dismissed before showing. Once visible, the dialog will be visible for at |
| * least MIN_SHOW_TIME to avoid "flashes" in the UI when an event could take a |
| * largely variable time to complete (from none, to a user perceivable amount) |
| * |
| * @author mindyp |
| */ |
| public class MinTimeProgressDialog extends ProgressDialog implements OnShowListener { |
| private static int sMinShowTime; |
| |
| private static int sMinDelay; |
| |
| private int mMinShowTime = -1; |
| |
| private long mStartTime = -1; |
| |
| private boolean mDismissed = false; |
| |
| private final Handler mHandler = new Handler(); |
| |
| private final Runnable mDelayedDismiss = new Runnable() { |
| @Override |
| public void run() { |
| MinTimeProgressDialog.super.dismiss(); |
| } |
| }; |
| |
| private final Runnable mDelayedShow = new Runnable() { |
| @Override |
| public void run() { |
| if (!mDismissed) { |
| MinTimeProgressDialog.super.show(); |
| } |
| } |
| }; |
| |
| public MinTimeProgressDialog(Context context) { |
| super(context, R.style.MinTimeProgressDialogStyle); |
| sMinShowTime = context.getResources() |
| .getInteger(R.integer.batch_progress_display_time); |
| sMinDelay = context.getResources() |
| .getInteger(R.integer.batch_progress_wait_time); |
| mMinShowTime = sMinShowTime |
| + context.getResources().getInteger(R.integer.dialog_animationDefaultDur); |
| } |
| |
| @Override |
| public void dismiss() { |
| mDismissed = true; |
| long diff = System.currentTimeMillis() - mStartTime; |
| if (diff >= mMinShowTime || mStartTime == -1) { |
| // This covers the case where the dialog was not shown |
| // at all yet OR enough time of the dialog showing |
| // has passed. If it wasn't shown at all yet, then it is |
| // just never shown. |
| super.dismiss(); |
| } else { |
| mHandler.postDelayed(mDelayedDismiss, mMinShowTime - diff); |
| } |
| } |
| |
| /** |
| * Dismiss the dialog, immediately if necessary. |
| * |
| * @param force If true, dismiss the dialog right away. |
| */ |
| public void dismiss(boolean force) { |
| if (force) { |
| mDismissed = true; |
| super.dismiss(); |
| } else { |
| dismiss(); |
| } |
| } |
| |
| @Override |
| public void show() { |
| mDismissed = false; |
| mHandler.postDelayed(mDelayedShow, sMinDelay); |
| } |
| |
| @Override |
| public void onShow(DialogInterface dialog) { |
| // When the dialog is actually shown, start the timer. |
| mStartTime = System.currentTimeMillis(); |
| } |
| |
| /** |
| * Show a MinTimeProgressDialog. |
| */ |
| public static MinTimeProgressDialog show(Context context, CharSequence title, |
| CharSequence message, boolean indeterminate, boolean cancelable, |
| OnCancelListener cancelListener) { |
| |
| MinTimeProgressDialog dialog = new MinTimeProgressDialog(context); |
| dialog.setTitle(title); |
| dialog.setMessage(message); |
| dialog.setIndeterminate(indeterminate); |
| dialog.setCancelable(cancelable); |
| dialog.setOnCancelListener(cancelListener); |
| dialog.setOnShowListener(dialog); |
| dialog.show(); |
| |
| return dialog; |
| } |
| } |