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How do I Drawn a Thick Dash line?

 
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LarryJ
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PostPosted: Sat Apr 07, 2007 10:47 pm    Post subject: How do I Drawn a Thick Dash line? Reply with quote


I am drawing lines on the PaintBox canvas using the code blow. When I create
the pen using a style other than PS_SOLID such as PS_DASHDOTDOT if the
PenWidth is greater than 1 the line will draw as a solid line rather than a
thick PS_DASHDOTDOT. Is there a way to draw a thick PS_DASHDOTDOT line?



PenWidth=5;
PenColor=clRed;

hpen = CreatePen(PS_DASHDOTDOT, PenWidth, PenColor);
OldBkMode = SetBkMode(hdc, TRANSPARENT);
SetBkColor(hdc, mychart->bgcolor);

ohpen = SelectObject(hdc, hpen);

MoveToEx(hdc, x1, y1, NULL);
LineTo(hdc, x2, y2 );


Thanks
Larry Johnson
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Remy Lebeau (TeamB)
Guest
PostPosted: Sat Apr 07, 2007 11:00 pm    Post subject: Re: How do I Drawn a Thick Dash line? Reply with quote


"LarryJ" <LarryJ33 (AT) austin (DOT) rr.com> wrote in message
news:4617d955$1 (AT) newsgroups (DOT) borland.com...

Quote:
When I create the pen using a style other than PS_SOLID such
as PS_DASHDOTDOT if the PenWidth is greater than 1 the line
will draw as a solid line rather than a thick PS_DASHDOTDOT.

Please read CreatePen()'s documentation:

"If the value specified by nWidth is greater than 1, the
fnPenStyle parameter must be PS_NULL, PS_SOLID, or PS_INSIDEFRAME."

Quote:
Is there a way to draw a thick PS_DASHDOTDOT line?

You will have to set the Width to 1 and then draw multiple times,
readjusting the offsets each time, ie:

hpen = CreatePen(PS_DASHDOTDOT, 1, PenColor);
//...
for(int i = 0; i < PenWidth; ++i)
{
MoveToEx(hdc, x1++, y1++, NULL);
LineTo(hdc, x2--, y2--);
}


Gambit
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LarryJ
Guest
PostPosted: Sun Apr 08, 2007 7:45 am    Post subject: Re: How do I Drawn a Thick Dash line? Reply with quote


I was hoping there was a replacement for CreatePen that could draw thick
dashed lines. I haven't seen the solution using multiple lines before so I
will try that.

Thanks
Larry

"Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote in message
news:4617dc3e$1 (AT) newsgroups (DOT) borland.com...
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