<![CDATA[QLine to QRect with Margin]]>line2rect.JPG

I have a QLine with A(a0,b0) and B(a1,b1) , where x is a margin. So i should find out final rect coordinates which formed by adding margin to the line AB.

]]>https://forum.qt.io/topic/139262/qline-to-qrect-with-marginRSS for NodeMon, 11 May 2026 05:36:08 GMTMon, 12 Sep 2022 17:47:44 GMT60<![CDATA[Reply to QLine to QRect with Margin on Mon, 12 Sep 2022 18:42:35 GMT]]>@DonCoder said in QLine to QRect with Margin:

I am new to QTransform,

See the documentation - a little bit of matematics.

]]>https://forum.qt.io/post/728433https://forum.qt.io/post/728433Mon, 12 Sep 2022 18:42:35 GMT<![CDATA[Reply to QLine to QRect with Margin on Mon, 12 Sep 2022 18:18:57 GMT]]>I am new to QTransform, will you eloborate your answer please

]]>https://forum.qt.io/post/728432https://forum.qt.io/post/728432Mon, 12 Sep 2022 18:18:57 GMT<![CDATA[Reply to QLine to QRect with Margin on Mon, 12 Sep 2022 18:10:59 GMT]]>Create a QTransform to move A to 0,0 (translate) and B to 0,y (rotate, you can get the rotation from QLineF::angle()). Apply the transform to your line.
Then you can calculate the margin points and transform them back with your calculated transform from above.

]]>https://forum.qt.io/post/728431https://forum.qt.io/post/728431Mon, 12 Sep 2022 18:10:59 GMT