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  • how many color combinations in a 24 bit image

    - by numerical25
    I am reading a book and I am not sure if its a mistake or I am misunderstanding the quote. It reads... Nowadays every PC you can buy has hardware that can render images with at least 16.7 million individual colors. Rather than have an array with thousands of color entries, the images instead contain explicit color values for each pixel. A 24-bit display, of course, uses 24 bits, or 3 bytes per pixel, for color information. This gives 1 byte, or 256 distinct values each, for red, green, and blue. This is generally called true color, because 256^3 (16.7 million) He says 1 byte is equal to 256 distinct values. 1 byte = 8 bits. 8^2 bits = 64 distinct colors right ?? It's not adding up right to me. I know it might be something simple to understand, but I don't understand.

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  • how many color combinations in a 24 bit image

    - by numerical25
    I am reading a book and I am not sure if its a mistake or I am misunderstanding the quote. It reads... Nowadays every PC you can buy has hardware that can render images with at least 16.7 million individual colors. Rather than have an array with thousands of color entries, the images instead contain explicit color values for each pixel. A 24-bit display, of course, uses 24 bits, or 3 bytes per pixel, for color information. This gives 1 byte, or 256 distinct values each, for red, green, and blue. This is generally called true color, because 256^3 (16.7 million) He says 1 byte is equal to 256 distinct values. 1 byte = 8 bits. 8^2 bits = 64 combinations of colors right ?? It's not adding up right to me. I know it might be something simple to understand, but I don't understand.

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  • IIS5, ASP.NET (3.5) Application and Visual Studio 2008

    - by Lakeshore
    I have a solution that was developed in VS 2008 that is configured to use IIS. I configure the Virtual directory in IIS the same way I have with other working solutions using IIS. When I either build and run the solution in VS 2008 or browse the virtual directory using IIS, I get the following error message. Internet Explorer cannot display the webpage What you can try: It appears you are not connected to the Internet, but you might want to try to reconnect to the Internet Retype the address Go back to the previous page. Most likely causes: You are not connected to the Internet The website is encountering problems There might be a typing error in the address. Why might this be?

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  • displaying structs in an array using enumerator

    - by Mostaguen
    In an object I have : public IEnumerable<voiture> recup_voitures() { foreach (voiture v in _arrVCollection) { yield return (v); } } voiture being a struct and _arrVCollection being an array containing some struct voiture. In my main class I have : foreach (CarCollection.voiture o in collection.recup_voitures()) { //some code to display the content of each struct } What is happening is that if I have an array of length 5 and only 1 struct voiture in it, it will do the displaying code 5 times instead of only 1. What am I doing wrong?

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  • How do I handle editing of custom types in a C# datagridview?

    - by Ian Hopkinson
    I have a datagridview in which one column contains a custom class, which I have set using: dgvPeriods.Columns[1].ValueType = typeof(ExDateTime); It is rigged up to display correctly by handling the CellFormatting event, but I'm unsure what event to handle for cell editing. In the absence of doing anything I get a FormatException as the datagridview tries to convert String to ExDateTime as I try to move focus out of the edited cell. I tried adding type conversion to my ExDateTime custom class: public static implicit operator ExDateTime(string b) { return new ExDateTime(b); } But this this didn't work. I also tried handling the DataError event, but this seems to fire too late. The datagridview is not databound.

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  • How can I make my counter look less fake?

    - by Eddy Pronk
    I'm using this bit of code to display the number of users on a site. My customer is complaining it looks fake. Any suggestions? var visitors = 187584; var updateVisitors = function() { visitors++; var vs = visitors.toString(), i = Math.floor(vs.length / 3), l = vs.length % 3; while (i-->0) if (!(l==0&&i==0)) vs = vs.slice(0,i*3+l) + ',' + vs.slice(i*3+l); $('#count').text(vs); setTimeout(updateVisitors, Math.random()*2000); }; setTimeout(updateVisitors, Math.random()*2000);

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  • How to test flash.message in a Grails webflow?

    - by callie16
    I'm using webflows in Grails and I'm currently writing tests for it. Now, inside I've got something that throws an error so I set a message to the flash scope before redirecting: ... if (some_condition) { flash.message = "my error message" return error() } ... Now, I know that when I'm going to display this in the GSP page, I access the flash message as <g:if test="${message}">... instead of the usual <g:if test="${flash.message}">... So anyway, I'm writing my test and I'm wondering how to test the content of the message? Usually, in normal actions in the controllers, I follow what's written in here . However, since this is a webflow, I can't seem to find the message even if I check controller.flash.message / controller.params.message / controller.message . I've also tried looking at the flow scope... Any ideas on how to see the message then? Thanks a bunch!

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  • Is it possible to implement Flex states in Android application.

    - by barmaleikin
    Hi guys, Let me explain what I am want to archive. For example, in Flex I can create page (list of something) with 3 states: Loading state (just display some animation or label with text "Please wait."), No records state (page with text saying that there is no records) and Page with populated list. It is very easy to operate with states in Flex. Is it possible to implement something similar in Android application? I would appreciate if you provide some examples.

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  • Forcing the browser to pop a save as dialog box from a link pointing to remote url

    - by user360788
    Hi, I am building a web app that lets the user directly download files on a cdn by clicking a link. The link should point to the cdn url directly in order to minimize the load on our servers. We would like the to have the browser pop up the save as dialog box when the user clicks the link to download the file and not have the browser display the content of the file at all. So the page should not reload. However, we don't have access to setting the HTTP headers sent back from cdn. Is it possible to still pop up the save as dialog box for download using client-side code?

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  • Html + Css: How to create a auto-resizing rotated background?

    - by Sebastian P.R. Gingter
    Hi, image a complete black web page. On this web page is a 100% size white div that fills the whole page. I'd like to rotate this div by -7 degrees (or 7 degrees counter-clock wise). This will result in the black background being visible in triangles on the edges, just like you had placed a piece of paper on a desk and turned it a bit to the left. Actually this can be done with some css and it's working quite well (except for IE). The real problem now is: I'd like to have a normal, non-rotated div element on top of that to display the content in, so that only the background is rotated. Rotating a contained div counterwise doesn't work though, because through the two transformations the text will be blurry in all browsers. How can I realize that? Best would be a solution workiing in current Webkit browsers, FF3.5+ and IE7+. If only IE8+ I could live with that too.

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  • CakePHP: Ajax view problem (nothing in the view showing)

    - by Adim
    I created a function in my controller called addToPlaylist($songName). I wanted to add these song names to an array and then a session variable using an Ajax call. The first time i did this i got an error saying i do not have a template file to display in the chosen div ("add_to_playlist.ctp was missing"). I created this file and everything seemed to be working correctly. Basically I went to bed woke up and it is broken (it is possible I changed something before I went to bed). The problem now is that it does not show anything when i click the ajax link. when i click on the ajax link it seems to call the function but nothing displays in the view (except debug info) even when i delete the view (add_to_playlist.ctp) i get no errors, I just see debug info now.

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  • Select Columns Only if String length is greater than 2

    - by Zee-pro
    Similar Question may be asked but I am unable to find anything that fits my needs. How can I select only columns where string length is greater than 2 This is how much has done yet. SELECT * FROM Table1 WHERE (Table1.ID = @ID) Or something like WHERE (Table1.ID = @ID) AND (LEN(*) > 2) Thank for all of your help I have a Table, in which I have 35 columns and a User ID column, now I want to select and display information from only those columns which have 2 string. I Like to Select only columns which have 2 string and the defined ID by User not the Whole Row !! I hope I am making sense. Table Desired Result DI 35 Lesson 4 Maths Lesson 9 ICT Lesson 12 English

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  • show output of file on client side using jquery + javascript .

    - by tazimk
    Hi, Written some code in my view function : This code reads a file from server . stores it in a list .passes to client def showfiledata(request): f = open("/home/tazim/webexample/test.txt") list = f.readlines() return_dict = {'list':list} json = simplejson.dumps(list) return HttpResponse(json,mimetype="application/json") On, client side the $.ajax callback function receives this list of lines. Now, My Question is . I have to display these lines in a textarea. But these lines should not be displayed at once . Each line should be appended in textarea with some delay. (Use of setInterval is required as per my knowledge) . Also I am using jquery in my templates. The server used is Django . Please provide some solution as in some sample code will be quite helpful .

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  • PHP Image content type problem

    - by Mirko
    Hi everybody, I have a specific problem, and cant get over it. For my latest project I need a simple PHP script that display an image according to its ID sent through URL. Here's the code: header("Content-type: image/jpeg"); $img = $_GET["img"]; echo file_get_contents("http://www.somesite.hr/images/$img"); The problem is that the image doesn't show although the browser recognizes it (i can see it in the page title), instead I get the image URL printed out. It doesn't work neither on a server with remote access allowed nor with one without. Also, nothing is printed or echoed before the header. I wonder if it is a content type error, or something else. Thanks in advance.

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  • Using sessions & session variables in a PHP Login Script

    - by user1325291
    I have just finished creating an entire login and register systsem in PHP, but my problem is I haven't used any sessions yet. (Like, there's not the word "session" in the entire script). I'm kind of a newbie in PHP and I've never used sessions before. What I want to do it, after the user registers and fills out the login form, they will still stay on the same page. So, like one half of the page will be if the session is logged_in and the other part will be else (the user is not logged in so display the login form). I also want to create session variables which will hold the username and password given at login. Thanks in advance! BTW this is my website - CP Cheats

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  • Datatables pagination characters "<<" and "<" not displaying correctly in IE and Safari

    - by Jaaromy
    I'm using the DataTables jQuery plugin and am having issues with the First and Previous pagination links displaying correctly in IE and Safari (Firefox and Opera work). "<<" and "<" display as "<" and "". $(document).ready(function () { oTable = $('#fileList').dataTable({ "bJQueryUI": true, "sPaginationType": "full_numbers", "oLanguage": { "sSearch": "Search all columns:", "oPaginate": { "sNext": '>', "sLast": '>>', "sFirst": '<<', "sPrevious": '<' } } }); I have attempted to escape '\<\<' to no avail. Any ideas?

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  • Is there a way to dynamically define how an image appear in a page or in certain layout?

    - by Starx
    For so many time, I have encountered problems with managing image having abnormally long height or width. If I fixed their height and widht, they will appear streched? If I fixed their width, and if the height of the image is very long then also it will mess up the overall website. If I fixed their height, and if the width of the image is very long then also it will mess up the overall website. The images I save in the local drive are saved maintaining the ratio? Let say user decides to upload image 1(height)*32(width). When he uploads this image, the script is made to resize the user uploaded image to height:1000px(just an example) So the resulting image in 1000px(height)*32000(widht), you see now the image is abnormally large. Now while displaying this image in a box of 1000px * 1000px, what is the best way to display this image?

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  • how to parse google search results on iphone

    - by Shibin Moideen
    Hi satckoverflow, I am trying to implement a search tool on my iPhone, when i enter a text it will be send to the google for searching. and return the result. I need to know how the text is given to the Google search engine and how the google is returning the result? Is it in the XML format or JSON. I can then parse the result XML/JSON on my iPhone and want to display the results in my table view. Any idea? need Help...! Thanks in advance, Shibin

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  • MySQL Query Join Table Selecting Highest Date Value

    - by ALHUI
    Here is the query that I run SELECT cl.cl_id, cc_rego, cc_model, cl_dateIn, cl_dateOut FROM courtesycar cc LEFT JOIN courtesyloan cl ON cc.cc_id = cl.cc_id Results: 1 NXI955 Prado 2013-10-24 11:48:38 NULL 2 RJI603 Avalon 2013-10-24 11:48:42 2013-10-24 11:54:18 3 RJI603 Avalon 2013-10-24 12:01:40 NULL The results that I wanted are to group by the cc_rego values and print the most recent cl_dateIn value. (Only Display Rows 1,3) Ive tried to use MAX on the date and group by clause, but it combines rows, 2 & 3 together showing both the highest value of dateIn and dateOut. Any help will be appreciated.

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  • Recommendations with hierarchical data on non-relational databases?

    - by Luki
    I'm developing an web application that uses a non-relational database as a backend (django-nonrel + AppEngine). I need to store some hierarchical data (projects/subproject_1/subproject_N/tasks), and I'm wondering which pattern should I use. For now I thought of: Adjacency List (store the item's parent id) Nested sets (store left and right values for the item) In my case, the depth of nesting for a normal user will not exceed 4-5 levels. Also, on the UI, I would like to have a pagination for the items on the first level, to avoid to load too many items at the first page load. From what I understand so far, nested sets are great when the hierarchy is used more for displaying. Adjacency lists are great when editing on the tree is done often. In my case I guess I need the displaying more than the editing (when using nested sets, even if the display would work great, the above pagination could complicate things on editing). Do you have any thoughts and advice, based on your experience with the non-relational databases?

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  • numberOfSectionsInTableView is requested in/after viewDidLoad ONLY if tableview is empty

    - by Ben Packard
    A simple tableviewController, empty. A modal that can be launched from a button. No data in the data source for the tableview, and no rows displayed. I open the modal, use it to add an item, and return to the tableview controller. The tableview updates itself automatically, and the new row is displayed. I add a second item. The table view does NOT update automatically. I can tell by logging inside numberOfSectionsInTableView that even if I go to add the first item and cancel, the tableview refreshes - it asks for the number of sections, rows, and the cell to display (if there is one). But not if there is one pre-existing row in the table. I've scoured my code but can't find anything that would cause the tableview to know when the first item is added, but none afterwards. Any ideas? EDIT - I have further narrowed my issue so will close this shortly and post a more specific question

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  • Creating a menu to switch languages on site

    - by user342391
    I have a dropdown menu on my site that I want to use to switch between the different languages: <select onChange="if(this.selectedIndex!=0) self.location=this.options[this.selectedIndex].value" name="userLanguage" id="userLanguage"> <option value="http://demo.com/?lang=en"> English (International)</option> <option value="http://demo.com/?lang=es"> Español (European)</option> </select> How can I get the above menu to display which language is currently showing. Is there someway of showing an active state. Site is using php. Thanks in advance.

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  • Using MicrosoftReportViewer with Web Forms programmatically

    - by user283897
    Hi, I'm repeating my question because the prior one under this topic was lost. Could you please help me? I want to use MicrosoftReportViewer for Web Forms so that the DataSource be set programmatically. There is some sample code on the Internet for Windows Forms but I haven't found anything for Web Forms. For example, here is some code I've tried to use. It gives no errors but nothing is displayed. How should I modify the code to display a table in the ReportViewer? Imports System.Data Imports Microsoft.Reporting.WebForms Partial Class TestReportViewer Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load CreateReport() End Sub Sub CreateReport() Dim dt As DataTable Dim rpt As ReportDataSource dt = New DataTable("Sample") With dt .Columns.Add("No", GetType(Integer)) .Columns.Add("Name") .Rows.Add(1, "A1") .Rows.Add(2, "A2") .Rows.Add(3, "A3") .Rows.Add(4, "A4") .AcceptChanges() End With rpt = New ReportDataSource rpt.DataMember = "Sample" rpt.Value = dt rpt.Name = "test" With ReportViewer1 .LocalReport.DataSources.Add(rpt) .DataBind() .LocalReport.Refresh() End With End Sub End Class

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  • Warning vs. error

    - by Samuel
    I had an annoying issue, getting a "Possible loss of precision" error when compiling my Java program on BlueJ (But from what i read this isn't connected to a specific IDE). I was surprised by the fact that the compiler told me there is a possible loss of precision and wouldnt let me compile/run the program. Why is this an error and not a warning saying you might loose precision here, if you don't want that change your code? The program runs just fine when i drop the float values, it wouldn't matter since there is no point (e.g [143.08, 475.015]) on my screen. On the other hand when i loop through an ArrayList and in this loop i have an if clause removing elements from the ArrayList it runs fine, just throws an error and doesn't display the ArrayList [used for drawing circles] for a fraction of a second. This appears to me as a severe error but doesn't cause (hardly) any troubles, while i wouldn't want to have such a thing in my code at all. What's the boundary?

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  • How refresh a DrawingArea in PyGTK ?

    - by Lialon
    I have an interface created with Glade. It contains a DrawingArea and buttons. I tried to create a Thread to refresh every X time my Canva. After a few seconds, I get error messages like: "X Window Server 0.0", "Fatal Error IO 11" Here is my code : import pygtk pygtk.require("2.0") import gtk import Canvas import threading as T import time import Map gtk.gdk.threads_init() class Interface(object): class ThreadCanvas(T.Thread): """Thread to display the map""" def __init__(self, interface): T.Thread.__init__(self) self.interface = interface self.started = True self.start() def run(self): while self.started: time.sleep(2) self.interface.on_canvas_expose_event() def stop(self): self.started = False def __init__(self): self.interface = gtk.Builder() self.interface.add_from_file("interface.glade") #Map self.map = Map.Map(2,2) #Canva self.canvas = Canvas.MyCanvas(self.interface.get_object("canvas"),self.game) self.interface.connect_signals(self) #Thread Canvas self.render = self.ThreadCanvas(self) def on_btnChange_clicked(self, widget): #Change map self.map.change() def on_interface_destroy(self, widget): self.render.stop() self.render.join() self.render._Thread__stop() gtk.main_quit() def on_canvas_expose_event(self): st = time.time() self.canvas.update(self.map) et = time.time() print "Canvas refresh in : %f times" %(et-st) def main(self): gtk.main() How can i fix these errors ?

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