How do I draw a thick line using cpen which has straight edges at the ends?

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Hi,
I'm trying to draw a thick line with CPen. The problem is that the ends are rounded. The lines look like sausages! Is there a way to make the end straight, so that it has right-angles, and effectively looks like a rectangle.

What I have tried:

Here is my code:

// CDC* m_CDC;

CPen* pen = new CPen;
int colour = RGB(0, 255, 0);
pen->CreatePen(PS_SOLID, 100000, (COLORREF)colour);
m_CDC->SelectObject(pen);

Posted 11-May-17 5:35am

Jackie Lloyd

Updated 11-May-17 6:23am

v2

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2 solutions

Solution 2

Thank you Rick, I did almost as you said, but you definitely set me in the right direction. I couldn't use the ExtCreatePen as it returns an HPEN, and I need a CPen. (I tried to find a way to convert but failed, maybe there is one?). So I used the other version of CreatePen:

LOGBRUSH lbrush;
lbrush.lbColor = colour;
lbrush.lbStyle = BS_SOLID;
pen->CreatePen(PS_SOLID | PS_GEOMETRIC | PS_ENDCAP_SQUARE, 500000, &lbrush);
m_CDC->SelectObject(pen);

However, I've no idea why the following didn't flatten the ends:

pen->CreatePen(PS_SOLID | PS_GEOMETRIC | PS_ENDCAP_FLAT, 500000, (COLORREF)colour);
m_CDC->SelectObject(pen);

Posted 11-May-17 6:23am

Jackie Lloyd

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Rick York · Accepted Answer · 2017-05-11T05:46:00

Solution 1

Have you tried ExtCreatePen with the PS_ENDCAP_FLAT flag set? There are a few other flags for the function that might be helpful. I recommend reading the docs for it.

Posted 11-May-17 5:46am

Rick York

Comments

Jackie Lloyd 11-May-17 11:51am

Before I saw your message I just tried CreatePen(PS_SOLID | PS_ENDCAP_FLAT, ... which made no difference. I'll try ExtCreatePen(), thank you.