Hi,

We need do draw some lines (in fact it is the highway road system in
luxemburg) and other graphic components and dynamically change the colors of
these lines based on some values which are generated in the backend. You can
check it out at : http://www.cita.lu

At the moment we have a simple flash application which does all the color
changing baed on the values an we want to change this application in a flex
application which gets the processed data through Java interaces. The problem
of this application is that most of the business logic is in the flash
application which we want to move to the Java application.

Our first problem is how do we draw the lines in flex ? We found some ideas
but they are all based on programatical drawing. So you write actionscript to
draw these lines. This is quite hard and also not very usefull as the location
of the lines do not change. Only their color ! So we want to draw the lines as
in Flash, which works fine and in some seconds.
Next idea we had war to draw the lines in flash and load this application in
flex with the "swloader" component. We can load the flash application but we
cannot access the draw lines. In fact they are drawn in flash and then
converted to "graphics" (not movieclips nor commands). They have a name in
flash but when we try to get a reference in flex to these elements we always
get a null reference.

Does somebody know a best practise or a solution of this problem ?

Thanks

Georges

Hi,

Declarative drawing is coming up in Flex 4. This is currently possible in Flex
3 using the Degrafa library: http://degrafa.com/

By the way, if you programatically draw the lines using actionscript, you can
move the lines simply by moving the Shape / Sprite object by changing it's x or
y property.

Hi,

Thanks for your reply.

The degrafa is an interesting library but all the lines are drawn in a
matematically way. You have to specify the coordiantes where you want to dra
the lines. The library hides to the user the nasty code of the drawing and
filling which is described in the doc of flex (programatical drawing) as I
understand. As I understood it is comparable to a taglib in java which hides
alle the nasty jsp scriptlet and html code to the user (like <hutputTest
value="Hello"/> for jsf components)

What we are looking for is the possibility to draw freehand lines. Like
drawing with the brush tool in flash on the background. And in flex we want to
have the possiblilty to change graphics of a flash component. Or, better would
be to leave out the flash component (not using the sfloader component) and draw
immediately in flex. For example take the panel or canvas component and draw
freehand lines on that component. And each line could be accessed by their ID.

Georges Goebel

[q]Originally posted by: georges.goebel

What we are looking for is the possibility to draw freehand lines. Like
drawing with the brush tool in flash on the background. And in flex we want to
have the possiblilty to change graphics of a flash component. Or, better would
be to leave out the flash component (not using the sfloader component) and draw
immediately in flex. For example take the panel or canvas component and draw
freehand lines on that component. And each line could be accessed by their ID.

Georges Goebel[/q]

you can do that by developing component in flash and then importing in flex,
flex can still access objects from within loaded swf file an also listne to its
event as well.

Check out http://graphics-geek.blogspot.com/20...er-part-i.html