HT201401 Automatic brightness not working
When I go the the bright places the iphone screen becomes bright and when i go back to the dark place the iphone screen doesnt dimm..that is it is not working in reverse...it only detects the brightness of the surrounding of it doesnt sence the darkness ..
hence my iphone is all time in full brightness once it senses the brightness of the surrounding.
what can be the solution ?
I think I have discovered the problem. The system remembers where you have manually set the brightness, and tries to stay around that level even when moving from bright to dark rooms.
I manually set the brightness to 5/8, waited a minute, then went outside in the sun. As expected, it adjusted to max. However, when I came back inside and sat down, it only went down to 5/8 again. I guess earlier when it was going down to 3/8, it was just trying to get back to my manual setting (I had set it to 3/8 this morning while in my dark bedroom). Even if I completely cover the sensor, the brightness now only goes down to about 4/8.
On the MacBook, it used the full range of brightness and completely ignored any previous manual settings. I could use the automatic feature to completely control the brightness at all times. Now, with the Air, the automatic feature instead tries to maintain the user-selected brightness level as much as possible.
I'm not sure which style I prefer. I did like not having to ever touch the brightness buttons, although I admit it was occasionally too dim in certain situations. I would prefer that the Air dim much more when in completely dark rooms, and maybe the sensitivity of the sensor should be increased a bit.
Now the only issue is how the keyboard backlight seems to stay on in all conditions except in the sun! It is on now even though it is obviously bright enough in the room to read a paperback book, let alone a keyboard.
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import org.apache.commons.lang.StringEscapeUtils;
import org.apache.commons.lang.StringUtils;
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String interactiveTypeCommand = "";
if (StringUtils.isNotBlank(interactiveType)){
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String duplexTypeCommand = "";
if (StringUtils.isNotBlank(duplexType)){
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return "" + // //
"var pp = this.getPrintParams();" + // //
// Nointeraction at all dialog, progress, cancel) //
interactiveTypeCommand + //
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"pp.printerName = \"" + StringEscapeUtils.escapeJavaScript(printerName) + "\";" + //
// Never print to a file. //
"pp.fileName = \"\";" + //
// Print images using 600 DPI. This option MUST be set or some barcodes cannot //
// be scanned anymore. //
"pp.bitmapDPI = 600;" + //
// Do not perform any page scaling //
"pp.pageHandling = pp.constants.handling.none;" + //
// Always print all pages //
"pp.pageSubset = pp.constants.subsets.all;" + //
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snippets for java code that adds
package be.post.lpo.util;
import org.apache.commons.lang.StringUtils;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.PdfAction;
import com.lowagie.text.pdf.PdfDestination;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class PdfMergerUtil{
private static final PdfName DID_PRINT = PdfName.DP;
private static final PdfName WILL_PRINT = PdfName.WP;
private List<PdfActionJavaScriptHolder> actionJavaScripts = new ArrayList<PdfActionJavaScriptHolder>();
private class PdfActionJavaScriptHolder{
private final PdfName actionType;
private final String javaScript;
public PdfActionJavaScriptHolder(PdfName actionType, String javaScript) {
super();
this.actionType = actionType;
this.javaScript = javaScript;
public PdfName getActionType(){
return this.actionType;
public String getJavaScript(){
return this.javaScript;
public void writePdfs(OutputStream outputStream, List<InputStream> documents, String documentLevelJavaScript) throws Exception {
Document document = new Document();
try {
// Create a writer for the outputstream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
document.open();
// Create Readers for the pdfs.
Iterator<PdfReader> iteratorPDFReader = getPdfReaders(documents.iterator());
writePdfReaders(document, writer, iteratorPDFReader);
if (StringUtils.isNotBlank(documentLevelJavaScript)){
writer.addJavaScript(documentLevelJavaScript);
addAdditionalActions(writer);
outputStream.flush();
} catch (Exception e) {
e.printStackTrace();
throw e;
} finally {
if (document.isOpen()){
document.close();
try {
if (outputStream != null){
outputStream.close();
} catch (IOException ioe) {
ioe.printStackTrace();
throw ioe;
public void addAdditionalDidPrintAction(String javaScript){
actionJavaScripts.add(new PdfActionJavaScriptHolder(DID_PRINT, javaScript));
public void addAdditionalWillPrintAction(String javaScript){
actionJavaScripts.add(new PdfActionJavaScriptHolder(WILL_PRINT, javaScript));
private void writePdfReaders(Document document, PdfWriter writer,
Iterator<PdfReader> iteratorPDFReader) {
int pageOfCurrentReaderPDF = 0;
// Loop through the PDF files and add to the output.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
// Create a new page in the target for each source page.
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
document.newPage();
pageOfCurrentReaderPDF++;
PdfImportedPage page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
writer.getDirectContent().addTemplate(page, 0, 0);
pageOfCurrentReaderPDF = 0;
private void addAdditionalActions(PdfWriter writer) throws DocumentException{
if (actionJavaScripts.size() != 0 ){
PdfAction action = PdfAction.gotoLocalPage(1, new PdfDestination(PdfDestination.FIT), writer);
writer.setOpenAction(action);
for (PdfActionJavaScriptHolder pdfAction : actionJavaScripts ){
if (StringUtils.isNotBlank(pdfAction.getJavaScript())){
action = PdfAction.javaScript(pdfAction.getJavaScript(), writer);
writer.setAdditionalAction(pdfAction.getActionType(), action);
private Iterator<PdfReader> getPdfReaders(Iterator<InputStream> iteratorPDFs) throws IOException {
List<PdfReader> readers = new ArrayList<PdfReader>();
while (iteratorPDFs.hasNext()) {
InputStream pdf = iteratorPDFs.next();
PdfReader pdfReader = new PdfReader(pdf);
readers.add(pdfReader);
return readers.iterator();
JSP code
<script type="text/javascript" src="<bean:message key="scripts.js.internal.jquery" bundle="app"/>"></script>
<script language="javascript">
function goToDidPrintUrl(){
var url = "<%=didPrintUrl%>";
window.location.assign(url);
function createMessageHandler() {
var PDFObject = document.getElementById("myPdf");
PDFObject.messageHandler = {
onMessage: function(msg) {
if (msg[0] == "WILL_PRINT"){
$("#printingTransitFeedBackMessage").text('<%=willPrintMessage%>');
if(msg[0] == "DID_PRINT"){
$("#printingTransitFeedBackMessage").text('<%=didPrintMessage%>');
setTimeout('goToDidPrintUrl()',4000);
onError: function(error, msg) {
alert(error.message);
</script>
</head>
<body onLoad="createMessageHandler();">
<div id="printingTransitFeedbackArea">
<div class="info" id="printingTransitFeedBackMessage"><%=documentOpenMessage%></div>
</div>
<object id="myPdf" type="application/pdf" width="100%" height="100%" data="<%=toBePrintedUrl%>">
</object>
</body>From the JS API Reference of the print method:
Non-interactive printing can only be executed during batch, console, and menu
events.
Outside of batch, console, and menu events, the values of bUI and of interactive are ignored
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