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  • Should i use a trigger or Behaviors for this?

    - by Michael
    I have an abstract object called Applicant and two different types of objects that inherit from Applicant called Business and Individual. So I have three classes that look like this: public abstract class Applicant { ... } public class Individual : Applicant { ... } public class Business : Applicant { ... } Now in the DataGrid I want to show all the details of Applicant object. When you choose a row I want to show details of either the business or individual as a internal grid. Something like this <DataGrid> <DataGrid.Columns> <!--Show different columns --> </DataGrid.Columns> <DataGrid.RowDetailsTemplate> <!--Show if Individual --> <DataGrid> <DataGrid.Columns> <DataGridTextColumn Header="First Name" ... /> <DataGridTextColumn Header="Last Name" ... /> </DataGrid.Columns> </DataGrid> <!--Show if business --> <DataGrid> <DataGrid.Columns> <DataGridTextColumn Header="Business Name" ... /> <DataGridTextColumn Header="Tax id" ... /> </DataGrid.Columns> </DataGrid> </DataGrid.RowDetailsTemplate> </DataGrid> Now I'm not sure if I need to use a Triggers or Behaviors to accomplish this? Thanks for everyones help! FYI I'm using Silverlight 4.0 with Prism.

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  • CGContextSetRBStrokeColor to replace, not add, for alpha?

    - by Peter Hajas
    I use CGContexts to allow the user to draw in my application, here's an example: CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), size); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(),r,g,b,a); I want the user to have an "eraser" tool that actually erases - it can't draw white (that would add white to the image, which may not have a white background) or alpha (or else the stroke won't do anything). Is there a way to do this? Perhaps replacing contents of a CGContext or UIImage?

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  • Overlay 2d weapon sprite over character sprite ?

    - by Mr.Gando
    Hello, I'm working on a game where my character needs to be able to have different weapons. For that I think that somehow overlaying the weapon over the moving sprite would be the correct choice, but I'm not sure about how could I do this. Assuming my Character spritesheet looks like this: And my preliminar weapon spritesheet ( haven't decided on a fixed square size for the weapon yet ), looks like this: How would you make the overlay to set the weapon correctly over the character hand for each of his frames? I know that one way would be just to have a weapon frame the same size as my character sprites, and overlay those too, but I think that if the game has way too much weapons (say 15 different kinds of one hand weaps) this could get pretty insane ( having one weapon sprite sheet the same size as the character sprite sheet for each type of weapon ) Do you guys have any advice on how to implement this? (supporting overlaying the weapon sprites over the character sprites) Thanks!

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  • drawing above gtkentry using cairo

    - by Durgesh
    Hi Experts, I want to use cairo to enhance gtkentry look. For this, I have connected a callback to 'expose-event'. In callback, I call gtkentry's original expose-event handler. After that, I create cairo context and draw some lines and destroy the cairo. I return 'TRUE' as return value of callback function so that expose-event does not propagate. Now my problem is, I am drawing line from (0,0) to (100,100). But line appears only over the border areas of the gtkentry. The place where text is, it does not appear. Please help. Kind Regards -Durgesh O Mishra

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  • Multidimensional vectors in scheme?

    - by incrediman
    I earlier asked a question about arrays in scheme (turns out they're called vectors but are basically otherwise the same as you'd expect). Is there an easy way to do multidimensional arrays vectors in PLT Scheme though? For my purposes I'd like to have a procedure called make-multid-vector or something. By the way if this doesn't already exist, I don't need a full code example of how to implement it. If I have to roll this myself I'd appreciate some general direction though. The way I'd probably do it is to just iterate through each element of the currently highest dimension of the vector to add another dimension, but I can see that being a bit ugly using scheme's recursive setup. Also, this seems like something I should have been able to find myself so please know that I did actually google it and nothing came up.

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  • 2D Spaceship movement math

    - by YAS
    Hi, I'm new here. I'm trying to make a top-down spaceship game and I want the movement to somewhat realistic. 360 degrees with inertia, gravity, etc. My problem is I can make the ship move 360 with inertia with no problem, but what I need to do is impose a limit for how fast the engines can go while not limiting other forces pushing/pulling the ship. So, if the engines speed is a maximum of 500 and the ship is going 1000 from a gravity well, the ship is not going to go 1500 when it's engines are on, but if is pointing away from the angle is going then it could slow down. For what it's worth, I'm using Construct (www.scirra.com), and all I need is the math of it. Thanks for any help, I'm going bald from trying to figure this out.

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  • How can I draw on JPanel using another quadrant for the coordinates?

    - by Sanoj
    I would like to draw some shapes on a JPanel by overriding paintComponent. I would like to be able to pan and zoom. Panning and zooming is easy to do with AffineTransform and the setTransform method on the Graphics2D object. After doing that I can easyli draw the shapes with g2.draw(myShape) The shapes are defined with the "world coordinates" so it works fine when panning and I have to translate them to the canvas/JPanel coordinates before drawing. Now I would like to change the quadrant of the coordinates. From the 4th quadrant that JPanel and computer often uses to the 1st quadrant that the users are most familiar with. The X is the same but the Y-axe should increase upwards instead of downwards. It is easy to redefine origo by new Point(origo.x, -origo.y); But How can I draw the shapes in this quadrant? I would like to keep the coordinates of the shapes (defined in the world coordinates) rather than have them in the canvas coordinates. So I need to transform them in some way, or transform the Graphics2D object, and I would like to do it efficiently. Can I do this with AffineTransform too?

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  • Accumulate 2D Array by Index

    - by Tegan Snyder
    I have an array that looks like this: Array ( [0] => Array ( [amount] => 60.00 [store_id] => 1 ) [1] => Array ( [amount] => 40.00 [store_id] => 1 ) [2] => Array ( [amount] => 10.00 [store_id] => 2 ) ) What would be a good method to reduce the array to a similar array that totals the 'amount' related to a store_id. For Instance I'd like to get this: Array ( [0] => Array ( [amount] => 100.00 [store_id] => 1 ) [2] => Array ( [amount] => 10.00 [store_id] => 2 ) )

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  • How do I set the current point in a CG graphics context?

    - by Joe
    When running the code below in the iphone simulator I get the error : CGContextClosePath: no current point. Why is the current point not being set? Or is the context not set to the correct state? CGContextBeginPath(ctx); CGMutablePathRef pathHolder; pathHolder = CGPathCreateMutable(); //move to point for the initial point NSLog(@"Drawing a state point %f, %f", [[holder.points objectAtIndex:0] floatValue], [[holder.points objectAtIndex:1] floatValue]); CGPathMoveToPoint(pathHolder, NULL, [[holder.points objectAtIndex:0] floatValue], [[holder.points objectAtIndex:1] floatValue]); for(int x = 2; x < [holder.points count] - 1; x += 2) { NSLog(@"Drawing a state point %f, %f", [[holder.points objectAtIndex:x] floatValue], [[holder.points objectAtIndex:(x+1)] floatValue]); CGPathAddLineToPoint(pathHolder, NULL, [[holder.points objectAtIndex:x] floatValue], [[holder.points objectAtIndex:(x+1)] floatValue]); } CGContextClosePath(ctx); CGContextFillPath(ctx);

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  • Problem draw line by Quartz 2D with alpha property < 1.0 on iPhone

    - by The Khanh
    Hello Everybody ! This code i use to draw in my app. So i have problem, if i draw with alpha property = 1. It is very good but if i change alpha property = 0.2 then my paint is not good. How do i make for better with alpha property = 0.2. http://www.flickr.com/photos/9601621@N05/page1/ Draw with alpha = 1: It is good Draw with alpha = 0.2: It is bad - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { if ([self.view superview] && (headerView.frame.origin.y == -30)) { mouseSwiped = YES; UITouch *touch = [touches anyObject]; CGPoint currentPoint = [touch locationInView:self.view]; currentPoint.y -= 20; UIGraphicsBeginImageContext(self.view.frame.size); CGContextRef context = UIGraphicsGetCurrentContext(); [drawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; CGContextSetLineCap(context, kCGLineCapRound); CGContextSetLineWidth(context, currentBrushProperty.brushSize); CGContextSetRGBStrokeColor(context, [self red], [self green], [self blue], currentBrushProperty.brushTransparency); CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0); CGContextBeginPath(context); CGContextMoveToPoint(context, lastPoint.x, lastPoint.y); CGContextAddLineToPoint(context, currentPoint.x, currentPoint.y); CGContextStrokePath(context); drawImage.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); lastPoint = currentPoint; }} Help me, please.

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  • Java2d: Set gradient for a lines

    - by Algorist
    Hi, I am having multiple points in a plane and some hundreds of lines pass through those points. Some points can have more lines passing through them than other points. I want to show some kind of more gradient or brightness associated with lines crowded together. Is this possible to do in java2d. Please refer to this : http://ft.ornl.gov/doku/_media/ft/projects/paraxis.jpg Thank you.

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  • draw ios quartz 2d path with a varying alpha component

    - by Giovanni
    Hi, I'd like to paint some Bezier curves with the alpha channel that is changing during the curve painting. Right now I'm able to draw bezier paths, with a fixed alpha channel. What I'd like to do is to draw a single bezier curve that uses a certain value of the alpha channel for the first n points of the path another, alpha value for the subsequent m points and so on. The code I'm using for drawing bezier path is: CGContextSetStrokeColorWithColor(context, curva.color.CGColor); .... CGContextAddCurveToPoint(context, cp1.x, cp1.y, cp2.x, cp2.y, endPoint.x, endPoint.y); .... CGContextStrokePath(context); Is there a way to achieve what I'm describing? Many thanks, Giovanni

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  • What's the right way to display a DBIx::Class ResultSet in my Catalyst project that uses Template To

    - by Thelema
    Given a DBIx::Class resultset, for example: my $rs = $c->model("DB::Card")->search({family_name => "Smith"}); the tutorials I've read use the stash to pass an arrayref of rows: $c->stash->{cards} = [$rs->all]; This results in the query getting executed at this point, and the resulting objects stuffed into the stash, so they can be used in TemplateToolkit as: [% FOREACH card IN cards %] [% card.given_name %] [% card.family_name %] [%END%] Is there a proper way to have TT iterate over the rows as they get fetched from the DB?

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  • Finding unreachable sections of a 2D map

    - by dada
    I don't want you to solve this problem for me, i just want to ask for some ideas. This is the input below, and it represents a map. The 'x' represents land, and the dots - water. So with the 'x' you can represent 'islands' on the map. xxx.x...xxxxx xxxx....x...x ........x.x.x ..xxxxx.x...x ..x...x.xxx.x ..x.x.x...x.. ..x...x...xxx ...xxxxxx.... x............ As you can see, there are some islands which are closed, i.e. if some boat is inside its territory, it won't be able to get out, for ex: ..xxxxx. ..x...x. ..x.x.x. ..x...x. ..xxxxx. And there are some open islands which is possible to get out of them, ex: .xxxxx .x...x .x.x.x .xxx.x The problem is this: For a given NxM map like those above, calculate howm any of the islands are open, and how many are closed. I repeat: I don't want you to solve it, just need some sugestions, ideas for solving. thanks

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  • shortest path search in a map represented as 2d shapes

    - by joe_shmoe
    Hi, I have a small library of a few shortest path search algorithms. They were developed for simple undirected graphs (the normal representation - vertices and edges). Now I'd like to somehow apply them on a bit different scenario - where the maps are represented as 2-dimensional shapes, connected by shared edges (edges of the polygons, that is). In this scenario, the search can start/end either at a map object or some point (x,y). What would be the best approach? Try to apply the algorithms onto shapes? or try to extract a 'normal' graph out of the shapes (I have preprocessing time available)? Any advice would be much appreciated, as I'm really not sure which way to go, and I don't have enough time (and skill) to explore many options... Thanks a lot

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  • Using PyLab to create a 2D graph from two separate lists

    - by user324333
    Hey Guys, This seems like a basic problem with an easy answer but I simply cannot figure it out no matter how much I try. I am trying to create a line graph based on two lists. For my x-axis, I want my list to be a set of strings. x_axis_list = ["Jan-06","Jul-06","Jan-07","Jul-07","Jan-08"] y_axis_list = [5,7,6,8,9] Any suggestions on how to best graph these items?

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  • Ideas for jumping in 2D with Actionscript 3 [included attempt]

    - by befall
    So, I'm working on the basics of Actionscript 3; making games and such. I designed a little space where everything is based on location of boundaries, using pixel-by-pixel movement, etc. So far, my guy can push a box around, and stops when running into the border, or when try to the push the box when it's against the border. So, next, I wanted to make it so when I bumped into the other box, it shot forward; a small jump sideways. I attempted to use this (foolishly) at first: // When right and left borders collide. if( (box1.x + box1.width/2) == (box2.x - box2.width/2) ) { // Nine times through for (var a:int = 1; a < 10; a++) { // Adds 1, 2, 3, 4, 5, 4, 3, 2, 1. if (a <= 5) { box2.x += a; } else { box2.x += a - (a - 5)*2 } } } Though, using this in the function I had for the movement (constantly checking for keys up, etc) does this all at once. Where should I start going about a frame-by-frame movement like that? Further more, it's not actually frames in the scene, just in the movement. This is a massive pile of garbage, I apologize, but any help would be appreciated.

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  • How to merge duplicates in 2D python arrays

    - by Wei Lou
    Hi, I have a set of data similar to this: No Start Time End Time CallType Info 1 13:14:37.236 13:14:53.700 Ping1 RTT(Avr):160ms 2 13:14:58.955 13:15:29.984 Ping2 RTT(Avr):40ms 3 13:19:12.754 13:19:14.757 Ping3_1 RTT(Avr):620ms 3 13:19:12.754 Ping3_2 RTT(Avr):210ms 4 13:14:58.955 13:15:29.984 Ping4 RTT(Avr):360ms 5 13:19:12.754 13:19:14.757 Ping1 RTT(Avr):40ms 6 13:19:59.862 13:20:01.522 Ping2 RTT(Avr):163ms ... when i parse through it, i need merge the results of Ping3_1 and Ping3_2. Then take average of those two row export as one row. So the end of result would be like this: No Start Time End Time CallType Info 1 13:14:37.236 13:14:53.700 Ping1 RTT(Avr):160ms 2 13:14:58.955 13:15:29.984 Ping2 RTT(Avr):40ms 3 13:19:12.754 13:19:14.757 Ping3 RTT(Avr):415ms 4 13:14:58.955 13:15:29.984 Ping4 RTT(Avr):360ms 5 13:19:12.754 13:19:14.757 Ping1 RTT(Avr):40ms 6 13:19:59.862 13:20:01.522 Ping2 RTT(Avr):163ms currently i am concatenating column 0 and 1 to make a unique key, find duplication there then doing rest of special treatment for those parallel Pings. It is not elegant at all. Just wonder what is the better way to do it. Thanks!

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  • How to draw a drop shadow AND gradient with quartz2d?

    - by Luke
    Hello! I've a custom shape drawing using coregraphics and i want to add a drop shadow and a gradient to it also. I've been trying and searching a lot of informations on how to combine and do this, but i can't get it to work. I'm able to draw only one either. Anyone doing this already or know how to do this? Thank you.

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  • How do i pack multiple rectangles in a 2d box tetris style

    - by mglmnc
    I have a number of rectangles of various widths and heights. I have a larger rectangular platform to put them on. I want to pack them on one side of the platform so they spread in the lengthwise (X) dimension but keep the widthwise (Y) dimension to a minimal. That is to place them like a tetris game. There can be no overlaps but there can be gaps. Is there an algorithm out there to do this?

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  • Java2d: Translate the axes

    - by Algorist
    Hi, I am developing an application using Java2d. The weird thing I noticed is, the original is at the top left corner and x and y axis increases from there. Is there a way to move the origin bottom left? Thank you.

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