Shoutbox

code:

---

CHOOSECOLOR.WriteDWORD(12, 0x00000000); //COLORREF rgbResult (COLORREF = 0x00bbggrr)

---

How can I pass RGB colour values in a string to this function?


I swear I'm not making all these posts to get a higher post count, honest!

var blue = 0xFF;
var green = 0xFF;
var red = 0xFF;

var color = (blue<<16)+(green<<8)+(red)

i think.

that doesn't help, if the values are coming from a string, like "#RRGGBB". So I use substr to separate the 3 colour values, but that doesn't turn it into a hex value

EDIT: mynetx provided me a solution

code:

---

CHOOSECOLOR.WriteDWORD(12, eval('0x00'+b+g+r));

---

Noes! You do know that eval() is evil?
You can simply use parseInt() on the different parts and choose 16 as base. This way, JScript will convert the string itself from hexadecimal to a decimal number.

code:

---

var sColor = "#001122";
var r = parseInt(sColor.substr(1, 2), 16);
var g = parseInt(sColor.substr(3, 2), 16);
var b = parseInt(sColor.substr(5, 2), 16);

var color = (b<<16) + (g<<8) + r;

CHOOSECOLOR.WriteDWORD(12, color);

---

quote:

---

Originally posted by Mattike
var color = (blue<<16) + (green<<8) + red;

---

Rather

code:

---

var color = (b<<16) + (g<<8) + r;

---

Just saw that both the methods give different results .

code:

---

var color = (b<<16) + (g<<8) + r; // #001122 => 1444608
var color = eval('0x00'+b+g+r); // #001122 => 139536

---

Riiiiight!

We'll need a hexadecimal-to-decimal conversion instead of a multiply-by-one!
Now fixing post...