draw curve

**d_stranz** · 23rd January 2011, 01:20

You might find that it is a whole lot easier to simply use Qwt instead of inventing your own plotting widget.

http://qwt.sourceforge.net

**szisziszilvi** · 24th January 2011, 12:31

yeah, I know, but I just could not figure out how to build that. But I would happily take someone's help to do that. I remember some strange moments which I couldn't explain, like I tried to make more than one time and although I did nothing to the project files the amount of warning messages started to reduce, but I can't remember what happened really. So maybe a real-time help could be the best. So that's how I started to build my own solution. But still it was worth as I learned a lot from this.

**d_stranz** · 24th January 2011, 16:18

Originally Posted by szisziszilvi

yeah, I know, but I just could not figure out how to build that. But I would happily take someone's help to do that. I remember some strange moments which I couldn't explain, like I tried to make more than one time and although I did nothing to the project files the amount of warning messages started to reduce, but I can't remember what happened really. So maybe a real-time help could be the best. So that's how I started to build my own solution. But still it was worth as I learned a lot from this.

OK, but what is more important to you? Getting your app to work and do what you want it to, or spending a lot of time writing a plotting widget that already exists? You -are- learning something, that's true, but it sounds like it is frustrating.

Building Qwt is easy. I don't know what platform you are on, but just use the .pro file with qmake. Any of the Qwt example programs will show you how to incorporate it into your own app.

**szisziszilvi** · 25th January 2011, 08:38

Originally Posted by d_stranz

OK, but what is more important to you? Getting your app to work and do what you want it to, or spending a lot of time writing a plotting widget that already exists? You -are- learning something, that's true, but it sounds like it is frustrating.

well, honestly actually both.

It's rather like a game for me, not really anything annoying.

Building Qwt is easy. I don't know what platform you are on, but just use the .pro file with qmake. Any of the Qwt example programs will show you how to incorporate it into your own app.

XP. But I thing I will open a new thread for this topic as it is not the question of using any "qpainting" device.