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  • Default FileField names for Django files

    - by Adam Nelson
    I have a model: class Example(models.Model): unique_hash = models.CharField(max_length=32,unique=True) content = models.FileField(upload_to='source',blank=True,verbose_name="HTML Content File") I would like to be able to set the content filename to default to a callable, but I don't see any way to have the callable reference unique_hash (or vice versa). Is this possible?

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  • When to use new layouts and when to use new activities?

    - by cmdfrg
    I'm making a game in Android and I'm trying to add a set of menu screens. Each screen takes up the whole display and has various transitions available to other screens. As a rough summary, the menu screens are: Start screen Difficult select screen Game screen. Pause screen. Game over screen. And there are several different ways you can transition between screen: 1 - 2 2 - 3 3 - 4 (pause game) 4 - 1 (exit game) 4 - 3 (resume game) 3 - 5 (game ends) Obviously, I need some stored state when moving between screens, such as the difficulty level select when starting a game and what the player's score is when the game over screen is shown. Can anyone give me some advice for the easiest way to implement the above screens and transitions in Android? All the create/destroy/pause/resume methods make me nervous about writing brittle code if I'm not careful. I'm not fond of using an Activity for each screen. It seems too heavy weight, having to pass data around using intents seems like a real pain and each screen isn't a useful module by itself. As the "back" button doesn't always go back to the previous screen either, my menu layout doesn't seem to fit the activity model well. At the moment, I'm representing each screen as an XML layout file and I have one activity. I set the different buttons on each layout to call setContentView to update the screen the main activity is showing (e.g. the pause button changes the layout to the pause screen). The activity holds onto all the state needed (e.g. the current difficulty level and the game high score), which makes it easy to share data between screens. This seems roughly similar to the LunarLander sample, except I'm using multiple screens. Does what I have at the moment sound OK or am I not doing things the typical Android way? Is there a class I can use (e.g. something like ViewFlipper) that could make my life easier? By the way, my game screen is implemented as a SurfaceView that stores the game state. I need the state in this view to persist between calls to setContentView (e.g. to resume from paused). Is the right idea to create the game view when the activity starts, keep a reference to it and then use this reference with setContentView whenever I want the game screen to appear?

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  • Why are member constants available even if there are no instances of a its class?

    - by flockofcode
    1) Why are member constants available even if there are no instances of a its class? 2) Is the only reason why constant expressions need to be fully evaluated at compile time due to compiler replacing constant variable with literal value? 3) Since string is also an object, I would think the following would produce an error, but it doesn’t. Why? class A { const string b = “it works”; } thank you

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  • why we can't initialize a servlet using constructor itself?

    - by Reddy
    Why do we have to override init() method in Servlets while we can do the initialization in the constructor and have web container call the constructor passing ServletConfig reference to servlet while calling constructor? Ofcourse container has to use reflection for this but container has to use reflection anyway to call a simple no-arg constructor

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  • Include a tpl file with variables (Smarty)

    - by user1640660
    I have a "links.tpl" file which contains lines with many variables such as below {assign var=link_main value="index.php"} {assign var=link_login value="?a=login"} but when i include this file in home.tpl using {include file="file.tpl"} the variables {$link_main}, {$link_login} are not included i put the {assign var=link_main value="index.php"} in home.tpl and it works but not from included file i have tried adding scope=global to variable and parent to include but nothing happened I tried the last few hours finding a solution, any help is appreciated

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  • C# Search for subdirectory (not for files)...

    - by Brad
    Every example I see seems to be for recursively getting files in subdirectories uses files only. What I'm trying to do is search a folder for a particular subdirectory named "xxx" then save that path to a variable so I can use it for other things. Is this possible without looping through all the directories and comparing by name?

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  • Resolving C++ Name Collision

    - by jnm2
    InitializeQTML is a function in QTML.h. I'm writing a wrapper and I would like to use the name InitializeQTML for the wrapper function: #include <QTML.h> public class QuickTime { public: static void InitializeQTML(InitializationFlags flag) { InitializeQTML((long)flag)); }; }; How can I reference the original InitializeQTML function from inside the wrapper function and avoid the name collision without renaming the wrapper?

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  • Where to learn about the Google Maps API v2 in Android

    - by misguided
    I am trying to learn a lot more about the Google Maps API in Android. I have seen the boston tutorials , which are very helpful in learning a lot of things related to android . But unfortunately , the tutorial talks about a earlier version on Google Maps API. I was wondering if there are any other sites which the experts would recommend(other than the reference on actual developers.google.com website). PS: specifically looking for android with latest version of google maps .References other than the one of developers.google.com

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  • Error in creating Google Calender "Reminder"

    - by Pari
    Hi, I am using below code to create reminder in Google calendar (using Google API ver 2 for c# ): Reminder reminder = new Reminder(); reminder.Minutes = 15; reminder.Method = Reminder.ReminderMethod.all; entry.Reminders.Add(reminder); // error at this line Getting Error : Object reference not set to an instance of an object. Thanx

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  • How should I lay-out my PHP login class?

    - by ThinkingInBits
    So, there is going to be one login form; however 1 of 3 types of members will be signing in member_type_a, member_type_b, member_type_c all of whom have some of the same properties, and some whom may have specific methods and/or properties to them. I want the class to be saved to a session variable for use with member area pages. Any suggestions on applicable design patterns?

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  • C# underlying types of enums

    - by Marlon
    What is the point of having enum SomeEnum : byte // <---- { SomeValue = 0x01, ... } when you have to make a cast just to assign it to the same type of variable as the enums underlying type? byte b = (byte)SomeEnum.SomeValue;

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  • Convert dependencies to point to View instead of Table

    - by jwarzech
    I currently have a SQL Server 2008 database in which I am planning to separate out some tables to other databases. I want to be able to replace all references to the separated tables from the original database using views. Is there a better way (other than manually changing all FK and SProc references) to switch all the dependencies to reference the view instead of the table?

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  • JPA polymorphic oneToMany

    - by bob
    I couldn't figure out how to cleanly do a tag cloud with JPA where each db entity can have many tags. E.g Post can have 0 or more Tags User can have 0 or more Tags Is there a better way in JPA than having to make all the entities subclass something like Taggable abstract class? Where a a Tag entity would reference many Taggables. thank you

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  • How to change color of selected references

    - by user272924
    Visual Studio 2010 highlights all references to the same variable (or class) when your cursor is placed over it. with the theme I use highlighted references are white on white - making them virtually impossible to read. what is the name of "display item" in Options- Environment Fonts and Colors that is responsible for that color? changing Plain Text to a darker one partially solves an issue however that also changes color for lots of other stuff on a screen, so ideally would be to change a background for this type of "selection"..

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  • what is this operator called and what is it used for <=>

    - by Scott
    I recently came across this magical operator when digging into Groovy: <= Groovy has really made me happy with elvis operators ?. and ?: which I use constantly now and very much wish were in Java. With this new operator, I have only found this reference. It seems to make comparators much easier. My question is how does it handle null values and how does it compare non Comparable object. Does this operator have a name, I couldn't find it Googling.

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  • How to do bulk update of views?

    - by Shaul
    My database has about 30 views, most of which have a reference to another database on this server (call it DB1). Now, without going into the reasons why, I need to update all those views to DB2, also on the local server. I would hate to have to do this manually on each view. Is there some SQL query I can run that will replace all occurrences of the string 'DB1' with 'DB2' in all my views?

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  • How to go to particular Item in IEnumerable

    - by Subhen
    Hi, I have Ienum which contains number Data inside it. Attached the snapShot of Viual Studio, Enum that Contains Data: Just to brief about the above image, eLevelData is the IEnumerable variable, in which I have my data . Now I want to go to the data at index 4 or 5, but I don't want to use foreach loop. Any suggestions please. Thanks, Subhen

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