how to fill the image with a particular color(pls don't say replace one img by anothr

[raghunadhs]

hi all!
i am developing a GUI in v.b 6.0. it consists of some images (asume there are some images such as power controls, some switches... like that). i want to give a choice to the user so that suppose if he clicks on a menu "Color Palete", a window should appear containing so many colors, if he selects one color. then immediately the image on GUI should be filled with that color.

i have done some experiments with "pset" which is one of the methods of Graphics in vb. here the problem is

All the images are round in shape, and a black cureve is inside it.
When ever a user selects a yellow color the entire image except that black curve should be filled with that color. i can observe the co ordinates of the black curve and fill the remaing part with yellow. but it is a very slow process....

What should i do to get my image be filled with desired color with fastness.... if u know kindly help me
Thanks in advance
Raghunadhs.v

[kadghar]

hi all!
i am developing a GUI in v.b 6.0. it consists of some images (asume there are some images such as power controls, some switches... like that). i want to give a choice to the user so that suppose if he clicks on a menu "Color Palete", a window should appear containing so many colors, if he selects one color. then immediately the image on GUI should be filled with that color.

i have done some experiments with "pset" which is one of the methods of Graphics in vb. here the problem is

All the images are round in shape, and a black cureve is inside it.
When ever a user selects a yellow color the entire image except that black curve should be filled with that color. i can observe the co ordinates of the black curve and fill the remaing part with yellow. but it is a very slow process....

What should i do to get my image be filled with desired color with fastness.... if u know kindly help me
Thanks in advance
Raghunadhs.v

why dont you use a gif with transparences? let transparent the part that you want to change and change de backcolor of the object.

I think that may be easier.

Good Luck

[Killer42]

I don't remember the details right now (and don't have time to search for it) but there is an API call to do a "flood fill". That'll do what you want. Try a bit of searching. I should have time in a day or two to go looking for it.

[raghunadhs]

I could not get your idea, regarding to the filling the image with a particular color.
can u give me an example.

here the problem is the image consists of a black curve in the middle of the image. when ever we are filling the image with paritcular color, that black curve should not be effected. it should be in black only...

kindly reply me if u know how to do it...

Thanks in advance:
regards:
Raghunadhs.v

[raghunadhs]

ok, killer, i will see that flood fill method...

Thanks,
regards:
raghunadhs.v

[Killer42]

ok, killer, i will see that flood fill method...

I should be able to look it up in an hour or two. In the meantime, just be aware that the floodfill will start from the specified point, and works like what you'd expect from a graphics program. So if you started at a point inside your black shape, for example, you would fill the shape with a colour.

(I always assumed you didn't want to just fill the entire image, because you could do that just by setting background colour and doing CLS.)

[raghunadhs]

Hi killer!
thanks for your regular correspondence. i saw an example of "flood fill method" but could not be able to understand that. so what i did was

(1): i found the black curve's co-ordinates by using the co-ordinates of the mouse click event.(... i collected co-ordinares by cliking the mouse on the curve, so the mouse's click event gives the x,y values of each pixel.. like that myanually i collected those stuff into an array)

(2):
now i filled the image with the user's color and then by using "pset" method i fill the co-ordinates that are in my array with black color one by one.

finally i got a image what i required.... actually this is applicable to pictur box only .. so i replaced my image to picture....


Killer... actually i don't know whether it is a proper way or not... but i have less time so i did like this.. if there is any othere methodology pls let me know...

And pls provide some sample code to the flood fill method.. it may use full to me in little future.

Thanks
regards:
raghunadhs.v

[Killer42]

Download the floodfill example from here. It's a simple form with a few lines of code, and produces wonderful results. No instructions, but you shouldn't have too much trouble picking the code apart.