how to use rgb color?

[no_hands]

I want to create a program that when I click, it will display a square with rgb color(fill).
and everytimes I click, a new square with different color will appear.
please provide rgb code.
>>
or any other idea, the concept is to display different color everytimes I click the mouse. (it doesnt have to be rgb.)
>>
thanx!

[kaaj]

Hi,

U can set a color to graphics object as below:

g2obj.setColor(Color.blue);


You can also create your own color objects:


1. Color ( int red, int green, int blue)

parameter values between 0 and 255

2. Color ( int red, int green, int blue , int alpha )

4th parameter transparency measure

0 - transparent

255 - opaque



also exist with float parameters…….

3. Color ( float red, float green, float blue)

4. Color ( float red, float green, float blue , float alpha )

parameter values between 0.0 and 1.0

After deciding upon the sequence of colors, Use MouseMotionListener and change color

[puxte]

You can get the the device context of the dialog and OnLButtonDown do as shown in the code snippet ..


void CKeyboardcaptureDlg::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags)
{
char lschar;
lschar = char(nChar); //Get the Key Up character
CClientDC dc(this); //Get the device context for this dialog

CRect rc;
GetWindowRect(&rc);
ScreenToClient(&rc);
if(lschar == 'R')
{
dc.FillSolidRect(rc,RGB(200,4,56));
}
if(lschar == 'T')
{
//CString strText = "Hello world";
//dc.DrawText(strText ,rc,DT_MODIFYSTRING);
dc.FillSolidRect(rc,RGB(0,4,244));
}
CDialog::OnKeyUp(nChar, nRepCnt, nFlags);
}

[pkalp]

To generate random colors everytime. Use Math.random()*255

Give the below code in mousePressed()


int r=(int)(Math.random()*255);
int g=(int)(Math.random()*255);
int b=(int)(Math.random()*255);
Color c=new Color(r,g,b);
gr.setColor(c);
gr.fillRect(50,50,100,100);

Let me know, if you still have problem.



-pkalp