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  • Really want to know how to set bg image to GtkEventBox.

    - by PP
    I want to set background image to GtkEventBox using style/rc file. The reason i want to do this, I want to put some widgets in that event box so that they will be displayed with the background. I am using GTk+ and C. ptomato: I know previously I had posted same question but there was not satisfactory answer so please don't prompt for that.

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  • Decision region plot for neural network in matlab

    - by Taban
    I have a neural network trained with backpropagation algorithm. I also create data set (input and target) random. Now I want to plot a decision region where each region is marked with a red star or with a blue circle according to whether it belongs to class 1 or -1. I searched a lot but just find plotpc function that is for perceptron algorithm. What should I try now? Any link or answer really helps. Thanks

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  • How can I use "FOR UPDATE" with a JOIN on Oracle?

    - by tangens
    The answer to another SO question was to use this SQL query: SELECT o.Id, o.attrib1, o.attrib2 FROM table1 o JOIN ( SELECT DISTINCT Id FROM table1, table2, table3 WHERE ... ) T1 ON o.id = T1.Id Now I wonder how I can use this statement together with the keyword FOR UPDATE. If I simply append it to the query, Oracle will tell me: ORA-02014: cannot select FOR UPDATE from view Do I have to modify the query or is there a trick to do this with Oracle? With MySql the statement works fine.

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  • Why are PNG-8 files mangled when opened in Photoshop?

    - by Daniel Beardsley
    Why are some 32 bit PNGs opened in Photoshop with Indexed Colors and no transparency? For instance, I grabbed a png icon file of the Stack Overflow logo at: http://blog.stackoverflow.com/wp-content/uploads/icon-so.png When opening it in Photoshop CS3, it apparently treats it as indexed color and gets rid of the alpha channel. The image on the right is a screen grab of the icon. Changing the Image mode in Photoshop to RGB doesn't change the image at all. I've tried this with a few other PNGs and it seems hit or miss. When viewed in other programs, it displays fine. left:png opened in Photoshop, right:screen grab of png from browser What gives?, does Photoshop not interpret the PNG file format correctly?

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  • Is there an OpenID demo server out there?

    - by billpg
    Hi everyone. I'm doing some experiements with adding OpenID to something I'm working on, and I'd like to test out a few providers. Is there a server out there that will go through the OpenID login process (same way that the StackOverflow group does) and tell me all the information the provider shows. I imagine it would work like... I go to example.com and type in https://www.google.com/accounts/o8/id example.com bounces me to google. I log in. Google asks me to confirm if I allow example.com access to everything. Google bounces me back to example.com example.com tells me my OpenID, email address, anything else it's got. Does such a thing please already exist?

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  • how do i load an image from a DB inside a jsf using managed beans?

    - by RhigoHR
    Hi.. i have a database with some images...could anyone tell me or explain me how could i can load an image in a jsf? I alredy have a managed bean that converts an Image object into a streamcontent...and this streamcontent is called from the page in a tag , but when a i check the source code of the page, there's no src where the image could be loaded. Hope an answer, thx

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  • how to go back to first if statement if no choices are valid - python

    - by wondergoat77
    how can i have python move to the top of an if statement if nothing is satisfied correctly i have a basic if/else statement like this: print "pick a number, 1 or 2" a = int(raw_input("> ") if a == 1: print "this" if a == 2: print "that" else: print "you have made an invalid choice, try again." what i want is to prompt the user to make another choice for 'a' this if statement without them having to restart the entire program, but am very new to python and am having trouble finding the answer online anywhere.

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  • how to use summation in matlab???

    - by lucky
    i have a randomly generated vector say A of length M say A=rand(M,1) and also i have function X(k)=sin(2*pi*k) how would i find Y(k) which is summation of A(l)*X(k-l) as l goes from 0 to M ... assume any value of k... but answer should be summation of all M+1 terms

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  • Why is my platform variable defined as 'BNB'?

    - by Scott Langham
    Hi, Something, maybe the windows sdk or visual studio installer, has defined the Platform environment variable and given it the value BNB. What does BNB mean, and why is Platform set to BNB? Thanks. I've seen this, but it doesn't answer my question: http://social.msdn.microsoft.com/Forums/en-US/msbuild/thread/1d229d75-aa89-42bf-809b-ef98f42072bb

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  • Turn off IIS 7.5 Attach security warning

    - by Miau
    IIS 7 and Visual Studio 2008, every time you attach to w3wp.exe you get an Attach Security Warning, How do you turn this of? It would be cool to know also, how to keep it attached for linger, as this seems to time out after a while Btw: I Added this as a comment to the answer below, the first thing i did was try the msdn article http://msdn.microsoft.com/en-us/library/ms241736.aspx that doesn't work

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  • Create, sort, and print a list of 100 random ints in the fewest chars of code

    - by TheSoftwareJedi
    What is the least amount of code you can write to create, sort (ascending), and print a list of 100 random positive integers? By least amount of code I mean characters contained in the entire source file, so get to minifying. I'm interested in seeing the answers using any and all programming languages. Let's try to keep one answer per language, edit the previous to correct or simplify. If you can't edit, comment?

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  • Escape SQL "LIKE" value for Postgres with psycopg2

    - by Evgeny
    Does psycopg2 have a function for escaping the value of a LIKE operand for Postgres? For example I may want to match strings that start with the string "20% of all", so I want to write something like this: sql = '... WHERE ... LIKE %(myvalue)s' cursor.fetchall(sql, { 'myvalue': escape_sql_like('20% of all') + '%' } Is there an existing escape_sql_like function that I could plug in here? (Similar question to How to quote a string value explicitly (Python DB API/Psycopg2), but I couldn't find an answer there.)

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  • Qt C++ XML, validating against a DTD?

    - by Airjoe
    Is there a way to validate an XML file against a DTD with Qt's XML handling? I've tried googling around but can't seem to get a straight answer. If Qt doesn't include support for validating an XML file, what might be the process of implementing validation myself? Any good reference to start with in regards to validating XML against a spec? Thanks for the help!

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  • g++ linker error--typeinfo, but not vtable

    - by James
    I know the standard answer for a linker error about missing typeinfo usually also involves vtable and some virtual function that I forgot to actually define. I'm fairly certain that's not the situation this time. Here's the error: UI.o: In function boost::shared_ptr<Graphics::Widgets::WidgetSet>::shared_ptr<Graphics::Resource::GroupByState>(boost::shared_ptr<Graphics::Resource::GroupByState> const&, boost::detail::dynamic_cast_tag)': UI.cpp:(.text._ZN5boost10shared_ptrIN8Graphics7Widgets9WidgetSetEEC1INS1_8Resource12GroupByStateEEERKNS0_IT_EENS_6detail16dynamic_cast_tagE[boost::shared_ptr<Graphics::Widgets::WidgetSet>::shared_ptr<Graphics::Resource::GroupByState>(boost::shared_ptr<Graphics::Resource::GroupByState> const&, boost::detail::dynamic_cast_tag)]+0x30): undefined reference totypeinfo for Graphics::Widgets::WidgetSet' Running c++filt on the obnoxious mangled name shows that it actually is looking at .boost::shared_ptr::shared_ptr(boost::shared_ptr const&, boost::detail::dynamic_cast_tag) The inheritance hierarchy looks something like class AbstractGroup { typedef boost::shared_ptr<AbstractGroup> Ptr; ... }; class WidgetSet : public AbstractGroup { typedef boost::shared_ptr<WidgetSet> Ptr; ... }; class GroupByState : public AbstractGroup { ... }; Then there's this: class UI : public GroupByState { ... void LoadWidgets( GroupByState::Ptr resource ); }; Then the original implementation: void UI::LoadWidgets( GroupByState::Ptr resource ) { WidgetSet::Ptr tmp( boost::dynamic_pointer_cast< WidgetSet >(resource) ); if( tmp ) { ... } } Stupid error on my part (trying to cast to a sibling class with a shared parent), even if the error is kind of cryptic. Changing to this: void UI::LoadWidgets( AbstractGroup::Ptr resource ) { WidgetSet::Ptr tmp( boost::dynamic_pointer_cast< WidgetSet >(resource) ); if( tmp ) { ... } } (which I'm fairly sure is what I actually meant to be doing) left me with a very similar error: UI.o: In function boost::shared_ptr<Graphics::Widgets::WidgetSet>::shared_ptr<Graphics::_Drawer::Group>(boost::shared_ptr<Graphics::_Drawer::Group> const&, boost::detail::dynamic_cast_tag)': UI.cpp:(.text._ZN5boost10shared_ptrIN8Graphics7Widgets9WidgetSetEEC1INS1_7_Drawer5GroupEEERKNS0_IT_EENS_6detail16dynamic_cast_tagE[boost::shared_ptr<Graphics::Widgets::WidgetSet>::shared_ptr<Graphics::_Drawer::Group>(boost::shared_ptr<Graphics::_Drawer::Group> const&, boost::detail::dynamic_cast_tag)]+0x30): undefined reference totypeinfo for Graphics::Widgets::WidgetSet' collect2: ld returned 1 exit status dynamic_cast_tag is just an empty struct in boost/shared_ptr.hpp. It's just a guess that boost might have anything at all to do with the error. Passing in a WidgetSet::Ptr totally eliminates the need for a cast, and it builds fine (which is why I think there's more going on than the standard answer for this question). Obviously, I'm trimming away a lot of details that might be important. My next step is to cut it down to the smallest example that fails to build, but I figured I'd try the lazy way out and take a stab on here first. TIA!

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  • Django - Can you use property as the field in an aggregation function?

    - by orokusaki
    I know the short answer because I tried it. Is there any way to accomplish this though (even if only on account of a hack)? class Ticket(models.Model): account = modelfields.AccountField() uuid = models.CharField(max_length=36, unique=True) created = models.DateTimeField(auto_now_add=True) class Meta: ordering = ['created'] @property def repair_cost(self): # cost is a @property of LineItem(models.Model) return self.lineitem_set.aggregate(models.Sum('cost'))

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  • about feeding of pythons

    - by djz
    i want to feed python but i cant see them eating live once . do they eat dead one ... and if i feed them a chicken leg piece which is boiled for the python to look like the live pray due to its heat will he eat ??? .. plz answer ....sir.....

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  • Convolving two signals

    - by John Elway
    Calculate the convolution of the following signals (your answer will be in the form of an equation): h[n] = delta[n-1] + delta[n+1], x[n] = delta[n-a] + delta[n+b] I'm lost as to what I do with h and x. Do I simply multiply them? h[n]*x[n]? I programmed convolution with several types of blurs and edge detectors, but I don't see how to translate that knowledge to this problem. please help!

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  • avoid textarea rows/cols error?

    - by acidzombie24
    I am using a few page validation tools one problem i have is they tell me textarea must have rows and cols attribute. If i am setting this in CSS or using display:none (and using it to hold raw text data) can i do something to skip? it seems like the only answer is rows="0" cols="0" each time i use it. But i have a feeling that is not a good solution.

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  • How to set up www cname for free dyndns subdomain

    - by Mk12
    I have a free dyndns domain mk12.gotdns.com How can I set up a cname for www.mk12.gotdns.com to point to mk12.gotdns.com? And how can I force the www one, so that if you navigate to mk12.gotdns.com, it will go to the www one? Note: I don't mean html redirecting, but I think you can do it with url rewriting somehow, something like described here. I've seen many tutorials, but they just vaguely say that you have to enter a cname record, I have no clue what file I need to put it in. Also, please see my question http://stackoverflow.com/questions/1618998/apache-url-rewriting-wont-work about getting url rewriting to work.

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  • Can someone explain how this works?

    - by Dan Howard
    Key in the first three digits of your phone number (NOT the Area code...) Multiply by 80 Add 1 Multiply by 250 Add to this the last 4 digits of your phone number Add to this the last 4 digits of your phone number again. Subtract 250 Divide number by 2 Do you recognize the answer??

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  • What is the best credit card processing service?

    - by JerSchneid
    We're looking to add credit card payments to our system (and it needs to be fairly custom, handling variable "per use" charges each month). We would like the integration to be simple and secure (i.e. no storing of credit card data on our system). What, in your opinion, is the best credit card processing provider to offer this kind of security and flexibility. List only one provider per answer to let the voting system do it's thing.

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