C / C++ / MFC Discussion Boards

Re: hex to decimal conversion

llp00na1-Jul-05 4:53

llp00na

1-Jul-05 4:53

I have tested #999 and i found that IE treats it as #090909

Which is bad news for me Frown | :-(

llp00na

Re: hex to decimal conversion

C^hris L^osinger1-Jul-05 4:59

C^hris L^osinger

1-Jul-05 4:59

not really.

6 hex digits : ok.
3 digits : ok (#fff = #0f0f0f)
anything else : add zeros to the right side to make 6 digits
word : use a map to find the RGB value

Cleek | Image Toolkits | Thumbnail maker

Re: hex to decimal conversion

toxcct1-Jul-05 1:10

toxcct

1-Jul-05 1:10

do you mean hexa into a string ? or hexa into an integer ?

if you want to cast an integer stored in hexa to a decimal, there"s no need to cas, because the hexadecimal is just a representation...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: hex to decimal conversion

llp00na1-Jul-05 1:39

llp00na

1-Jul-05 1:39

All i want to do is to convert colour formats to RGB decimal representation

for example: convert #ff0000 to be (255,0,0)

more complicated cases is when i encounter colours expressed as: #999
or #3333

how do you know which part is red, green, and blue !!!

llp00na

Re: hex to decimal conversion

Alexander ^M.,1-Jul-05 2:03

Alexander ^M.,

1-Jul-05 2:03

#999 = #000999
#3333 = #003333
Isn't it?

Don't try it, just do it! Wink | ;-)

Re: hex to decimal conversion

llp00na1-Jul-05 2:13

llp00na

1-Jul-05 2:13

#999 = #090909 not #000999 (which are totally different)

#3333 can be #003333 or #033303 or #330303 or ...

you get my point !!!

llp00na

Re: hex to decimal conversion

Cedric Moonen1-Jul-05 2:15

Cedric Moonen

1-Jul-05 2:15

llp00na wrote:
#3333 can be #003333 or #033303 or #330303 or ...

So it is impossible to translate to decimal ! You cannot guess what the user wanted to have !! It is purely impossible without some strict rules.

Re: hex to decimal conversion

Alexander ^M.,1-Jul-05 2:19

Alexander ^M.,

1-Jul-05 2:19

When I type #999 in any graphics software I get #000999...!

Don't try it, just do it! Wink | ;-)

Re: hex to decimal conversion

RChin1-Jul-05 3:47

RChin

1-Jul-05 3:47

llp00na wrote:
#3333 can be #003333 or #033303 or #330303 or ...

If you stick with the numeric rules, there is no confusion
#3333 = 3333h = 0x3333 = 0x003333.
A good way to test this is if you type in the numeral in you calculator and see how it parses the input. leading zeros are implied and therefore not displayed.

I Dream of Absolute Zero

Re: hex to decimal conversion

GDavy1-Jul-05 2:20

GDavy

1-Jul-05 2:20

split the hex number up in respective RGB values
0x112233 -> 0x11 is red 0x22is green 0x33 is blue

with some bitwise shifting the individual values are easily extracted.
COLORREF nRGBVal = 0x112233;
BYTE nRed = 0xFF&(nRGBVal>>16);
BYTE nGreen = 0xFF&(nRGBVal>>8);
BYTE nBlue = 0xFF&nRGBVal;

That should do it I guess..

Re: hex to decimal conversion

David Crow1-Jul-05 3:12

David Crow

1-Jul-05 3:12

GDavy wrote:
BYTE nRed = 0xFF&(nRGBVal>>16);
BYTE nGreen = 0xFF&(nRGBVal>>8);
BYTE nBlue = 0xFF&nRGBVal;

Use GetRValue(), GetGValue(), and GetBValue() for this.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: hex to decimal conversion

llp00na1-Jul-05 5:22

llp00na

1-Jul-05 5:22

Please remember that i am getting the colour as a string (eg. #ffffff is a string)

llp00na

Re: hex to decimal conversion

David Crow1-Jul-05 3:08

David Crow

1-Jul-05 3:08

Use strtoul(). It's easier to check for errors than sscanf().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: hex to decimal conversion

Blake Miller1-Jul-05 7:25

Blake Miller

1-Jul-05 7:25

And probably a damn sight faster too - no parsing involved Laugh | :laugh:

Re: hex to decimal conversion

David Crow1-Jul-05 7:36

David Crow

1-Jul-05 7:36

While sscanf's format string can do lots of magical things, the function as a whole does not lend itself to easy error detection and recovery. strtoul() is a tad bit better, but the ultimate solution would of course be a finite state machine (FSM).

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: hex to decimal conversion

llp00na4-Jul-05 5:05

llp00na

4-Jul-05 5:05

thanx everyone for helping me sorting my problem, here is more explanation to the RGB possible formats

The format of an RGB value in hexadecimal notation is a '#' immediately followed by either three or six hexadecimal characters. The three-digit RGB notation (#rgb) is converted into six-digit form (#rrggbb) by replicating digits, not by adding zeros. For example, #fb0 expands to #ffbb00. This makes sure that white (#ffffff) can be specified with the short notation (#fff) and removes any dependencies on the color depth of the display

cheers

llp00na

Change Group Box Border Colour

InflatableGarfield1-Jul-05 0:06

InflatableGarfield

1-Jul-05 0:06

Hi, does anyone know how to change the colour of a group box's border using Windows APIs and not in MFC.

Ive already looked into WM_CTLCOLORBTN messages but I can only change the text's background colour and text colour.

Please help, thanks!

using microsoft activex control for chart

sayup30-Jun-05 23:17

sayup

30-Jun-05 23:17

hello,

I am trying to use the microsoft activex chart control for plotting graph.I went to option Insert->Componenets and Controls->Microsoft chart control6.0.
Now classes and files for this control have been included.But the graphical view of the graph(i.e the dialog resource file is not seen anywhwere)do i have to include it?
what are the steps to be taken?
plz reply urgently

sayup

Re: using microsoft activex control for chart

Cedric Moonen30-Jun-05 23:21

Cedric Moonen

30-Jun-05 23:21

If you go in the resource editor, it should have been added to the existing controls (buttons, edit ctrl, list ctrl, ...). So just drop it on the dialog you want. The view is not automatically created as this is just a control like another one.

Re: using microsoft activex control for chart

sayup1-Jul-05 1:42

sayup

1-Jul-05 1:42

thanks,
I got it...
I have a demo code which uses this activex control.It works fine for small set of data and data plotted gradually.But for large data when i keep refreshing the graph flicker a lot..
Smaller is the duration greater are the number of flickerations...
Is there a solution for this?

sayup

Re: using microsoft activex control for chart

Cedric Moonen1-Jul-05 2:11

Cedric Moonen

1-Jul-05 2:11

That's probably because the ActiveX control redraws everything each time you update the data. What kind of data do you specifically needs to display ? Lines, points, ... ? And what are you refreshing ? All the data at each time or just adding some new points ?

I don't think there are chart controls on this website (there is a section where you can find some of these) that supports 'real-time' plotting of data. Some times ago, I was searching for such a control but I couldn't find something that fits to what I was looking for. So I decided to develop my own. I can send it to you maybe it will solve your problem. It was designed to work on a PocketPC. I will probably make an article with that control but I stil couldn't find the time to do it Unsure | :~

But before sending you the source files, I need to know if this will be ok for you. What kind of axis are you using also ? Automatic axis or fixed axis ? What is approximately the refresh rate of the data ?

If you could give me more the more informations you can, I could check if what I wrote will fit with what you are looking for.

Re: using microsoft activex control for chart

sayup4-Jul-05 3:59

sayup

4-Jul-05 3:59

thanks for the help and the offer to share your control.Thankfully the issue due to some reason is no longer a problem...
one more doubt i have is that,i want to know whether it is possible to display a dialog box in a SDI or MDI client area? and further at a specific position say along the frame of the client area.In case of MDI this can this dialog box be present in the initial parent window?
thanks once again,
waiting for reply

How to run an exe on a web site

sirtimid30-Jun-05 23:16

sirtimid

30-Jun-05 23:16

I have an application and I would like to know if it is possible to run it remotely on the internet by pressing a link on a web site and if yes, how can I do that?

Thanks in Advance

sirtimid

Re: How to run an exe on a web site

Manfred Staiger30-Jun-05 23:53

Manfred Staiger

30-Jun-05 23:53

You can start an application on your webserver with a server-side script (ASP for example)

MS

Re: How to run an exe on a web site

sirtimid30-Jun-05 23:57

sirtimid

30-Jun-05 23:57

Thank you very much! If this is possible can you please give me some references on how to do that with ASP? If you have any link which there is an example it would be very helpfull!

Thanks

sirtimid

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