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  • WPF: Canvas Events Not working

    - by user279244
    Hi I have set Mouse Events on a canvas as follows MouseUp="CanvasUp" MouseDown="CanvasDown" MouseMove="CanvasMove" But these are active only on the child elements like Images and Rectangles, but not on the empty space. Please tell me how to solve Thanks

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  • How to push_back without operator=() for const members?

    - by WilliamKF
    How to push_back() to a C++ std::vector without using operator=() for which the default definition violates having const members? struct Item { Item(int value) : _value(value) { } const int _value; } vector<Item> items; items.push_back(Item(3)); I'd like to keep the _value const since it should not change after the object is constructed, so the question is how do I initialize my vector with elements without invoking operator=()?

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  • hash table with chaining method program freezing

    - by Justin Carrey
    I am implementing hash table in C using linked list chaining method. The program compiles but when inserting a string in hash table, the program freezes and gets stuck. The program is below: struct llist{ char *s; struct llist *next; }; struct llist *a[100]; void hinsert(char *str){ int strint, hashinp; strint = 0; hashinp = 0; while(*str){ strint = strint+(*str); } hashinp = (strint%100); if(a[hashinp] == NULL){ struct llist *node; node = (struct llist *)malloc(sizeof(struct llist)); node->s = str; node->next = NULL; a[hashinp] = node; } else{ struct llist *node, *ptr; node = (struct llist *)malloc(sizeof(struct llist)); node->s = str; node->next = NULL; ptr = a[hashinp]; while(ptr->next != NULL){ ptr = ptr->next; } ptr->next = node; } } void hsearch(char *strsrch){ int strint1, hashinp1; strint1 = 0; hashinp1 = 0; while(*strsrch){ strint1 = strint1+(*strsrch); } hashinp1 = (strint1%100); struct llist *ptr1; ptr1 = a[hashinp1]; while(ptr1 != NULL){ if(ptr1->s == strsrch){ cout << "Element Found\n"; break; } else{ ptr1 = ptr1->next; } } if(ptr1 == NULL){ cout << "Element Not Found\n"; } } hinsert() is to insert elements into hash and hsearch is to search an element in the hash. Hash function is written inside hinsert() itself. In the main(), what i am initializing all the elements in a[] to be NULL like this: for(int i = 0;i < 100; i++){ a[i] = NULL; } Help is very much appreciated. Thanks !

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  • Would this Jquery selector work?

    - by Alex
    Hi all, would the following Jquery selector get all of the 4th td elements of all the tables on the current page, and return their text as an array?: var isbn = $.makeArray($("table tr td:nth-child(4)").text());

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  • How to ensure structures are completly initialized (by name) in GCC?

    - by Steven Spark
    How do I ensure each and every field of my structures are initialized in GCC when using designated initializers? (I'm especially interested in function pointers.) (I'm using C not C++.) Here is an example: typedef struct { int a; int b; } foo_t; typedef struct { void (*Start)(void); void (*Stop)(void); } bar_t; foo_t fooo = { 5 }; foo_t food = { .b=4 }; bar_t baro = { NULL }; bar_t bard = { .Start = NULL }; -Wmissing-field-initializers does not help at all. It works for fooo only in GCC (mingw 4.7.3, 4.8.1), and clang does only marginally better (no warnings for food and bard). I'm sure there is a reason for not producing warnings for designated initializer (even when I explicitly ask for them) but I want/need them. I do not want to initialize structures based on order/position because that is more error prone (for example swapping Start and Stop won't even give any warning). And neither gcc nor clang will give any warning that I failed to explicitly initialize a field (when initializing by name). I also don't want to litter my code with if(x.y==NULL) lines for multiple reasons, one of which is I want compile time warnings and not runtime errors. At least splint will give me warnings on all 4 cases, but unfortunately I cannot use splint all the time (it chokes on some of the code (fails to parse some C99, GCC extensions)). Note: If I'm using a real function instead of NULL GCC will also show a warning for baro (but not bard). I searched google and stack overflow but only found related questions and have not found answer for this specific problem. The best match I have found is 'Ensure that all elements in a structure are initialized' Ensure that all elements in a structure are initialized Which asks pretty much the same question, but has no satisfying answer. Is there a better way dealing with this that I have not mentioned? (Maybe other code analysis tool? Preferably something (free) that can be integrated into Eclipse or Visual Studio...)

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  • Selenium IDE and telling it to record actions

    - by sprog
    I am trying to make a little application to allow to record actions within a Flash and Silverlight application. In such manner that you can compile your interactive application in test-mode and then be able to click on elements which then passed the action to Selenium IDE which then adds this command to the testcase. I am curious if this even possible and how I can achieve this in Firefox?

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  • stick button to bottom of element

    - by dzona
    Is there any way to stick child button element to bottom of parent element when number of child elements vary? Parent element is fixed height, and could be scrolled vertically in case of child overflow. In that case, button should be at the end of child list, but in case there is no children, or children size don't push parent element to overflow, it should be at bottom of parent element. Is there pure css solution for this? Thanks

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  • Object synchronization with GUI Controls in C#

    - by Heka
    Hi, Every time when I change some values in form controls, I need to set a property of an object or vice versa. Instead of writing some methods for each control, I want a general solution for GUI elements. I do not use WPF but only C# 3.0. Any suggestions? Thanks.

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  • Jquery .text() call returns null?

    - by Alex
    Hey all, I'm practicing Jquery and I've written this simple Jquery statement: var someText = $("table tr td").text(); Should this not return all text of td elements found within tr's that are found within tables? How do I fix this? Currently when I run this, it says that table tr td is null, but I have a table on the page I'm testing on. Thanks!

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  • Has anyone sucessfully installed balmer, the photo gallery?

    - by saliem
    I am trying to install balder - the carrier wave tree i am getting some errors including: not seeing the form elements for adding photos. getting an error message "command exiftool not found" I think I've installed all the gems and software already. Anyone here good with troubleshooting code? also - i've got some screenshots handy if you need them. stackoverflow wont let me post images yet :/ also, are there any other alternative photo galleries written for ROR?

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  • Getting jQuery to recognise .change() in IE

    - by Philip Morton
    I'm using jQuery to hide and show elements when a radio button group is altered/clicked. It works fine in browsers like Firefox, but in IE 6 and 7, the action only occurs when the user then clicks somewhere else on the page. To elaborate, when you load the page, everything looks fine. In Firefox, if you click a radio button, one table row is hidden and the other one is shown immediately. However, in IE 6 and 7, you click the radio button and nothing will happen until you click somewhere on the page. Only then does IE redraw the page, hiding and showing the relevant elements. Here's the jQuery I'm using: $(document).ready(function(){ $(".hiddenOnLoad").hide(); $("#viewByOrg").change(function () { $(".visibleOnLoad").show(); $(".hiddenOnLoad").hide(); }); $("#viewByProduct").change(function () { $(".visibleOnLoad").hide(); $(".hiddenOnLoad").show(); }); }); Here's the part of the XHTML that it affects. Apologies if it's not very clean, but the whole page does validate as XHTML 1.0 Strict: <tr> <td>View by:</td> <td> <p> <input type="radio" name="viewBy" id="viewByOrg" value="organisation" checked="checked"/> Organisation </p> <p> <input type="radio" name="viewBy" id="viewByProduct" value="product"/> Product </p> </td> </tr> <tr class="visibleOnLoad"> <td>Organisation:</td> <td> <select name="organisation" id="organisation" multiple="multiple" size="10"> <option value="1">Option 1</option> <option value="2">Option 2</option> </select> </td> </tr> <tr class="hiddenOnLoad"> <td>Product:</td> <td> <select name="product" id="product" multiple="multiple" size="10"> <option value="1">Option 1</option> <option value="2">Option 2</option> </select> </td> </tr> If anyone has any ideas why this is happening and how to fix it, they would be very much appreciated!

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  • CSS selector for first element with class

    - by Rajat
    I have a bunch of elements with a classname <p class="red"></p> <div class="red"></div> I cant seem to select the first element with the class="red" using the following CSS rule: .red:first-child{ border:5px solid red; } What is wrong in this selector and how to correct it ??

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  • Why should I use display:table instead of table

    - by nimo9367
    What's the benefits of structuring my site with divs and apply the display:table property ( display:tr, display:tr). Doesn't this mean that the divs will behave exactly like tr and td elements? I know I probably shouldn’t use tables or table behavior for layout at all but I'm just curious if there's a difference and a benefit?

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  • sending full form data to back end using jquery

    - by pradeep
    i have a form that is dynamically built. so the number of form elements arr not fixed. I wnat to send whole of $_POSt data from the form using jquery to back end for processing .i cant use jquery form plugin as the jquery version i am using is old. any other way ? i tied to do like this $.post('all_include_files/update_save.php',{variable:"<?php echo json_encode($_POST) ?>"},function(data) { alert(data); }) but did not work

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  • Create comma seperated values in perl

    - by Mike
    Let's say I have a list of elements @list=(1,2,3); #desired output 1,2,3 And I want to print them as comma seperated values. And most importantly, I do not want the last element to have a comma after it. What is the cleanest way to do this in Perl?

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  • Python: How can I read in the characters from a line in a file and convert them to floats and strs, depending on if they are numbers or letters?

    - by user1467577
    I have a file that looks like: 1 1 C C 1.9873 2.347 3.88776 1 2 C Si 4.887 9.009 1.21 I would like to read in the contents of the file, line-by-line. When I only had numbers on the lines I used: for line in readlines(file): data = map(float, line.split) But this only works when all the elements of line.split are numbers. How can I make it store the letters as strings and the numbers as floats?

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  • Null pointer exception on .iterator() call

    - by Peter
    I'm getting a strange NullPointerException, evidently thrown by the following line of code: Iterator<Note> it = notes.iterator(); I've checked, and at the time the java.util.TreeSet notes is always non-null (with 15 elements). The TreeSet API says nothing about iterator() throwing NullPointerExceptions. What else could be going here?

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  • IBOutlets are always nil

    - by Jonas
    Hi, In IB I have subclassed the File Owner and the subclass loads my .nib. The subclass itself doesn't need access to the IBOutlets so they're instance variables in another class, which I added as a subclass of NSObject in the .nib. Then I connected the interface elements to that object. But somehow, in the class that "owns" the IBOutlets, they show up as nil. What am I doing wrong here?

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  • C# WPF XAML Loading

    - by user3713589
    Hi I'd like to inquire on how i can load a WPF Xaml into code so that I can change the values of the attributes of some XAML elements and output it by creating another XAML files. This is so that I can output the same file with values dynamically input by the user. the XamlReader.Load() method cannot be used; it will throw an exception (because they are unable to recognise Window as the root element). I'm using VS2013 and C#.

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