QTransform doubts .

I have my QTranform defined and applied to the Painter of a QWidget.
It works fine, I draw my objetcs .
I have two questions unresolved
1.- 'Map' works bad. ( I have very strange results)
I dont understand how I can draw right and however the map function return bad coords
2.- Setwindow and setviewport gives me the same results of Qtransform??
Thanks

Quote:

---

Originally Posted by tonnot

I have two questions unresolved
1.- 'Map' works bad. ( I have very strange results)
I dont understand how I can draw right and however the map function return bad coords

---

What is the question? You don't tell us what exactly you are doing or expecting so we don't know exactly what to tell you.

Quote:

---

2.- Setwindow and setviewport gives me the same results of Qtransform??

---

Maybe, they are possibly related: Window-Viewport Conversion

For the question 1, I can draw my objects ok (in the custom world I have defined using Qtransform).
But Qtransform.Map (mouse_x, mouse_y, realX, realY) does not give me correct values for realX and realY.
Thanks.

Care to give an example?

Code:

---

AFT.reset();  // AFT is a Qtranform 
 AFT.translate(scrollh, scrollv);	     // pixles
 AFT.scale(escalex, -escaley);          // escale =  widget pixels siz e / world  
 AFT.translate(-xc, -yc);                   // center of my world

---

I have two private vars double real_x, real_y;
And at mousemove event

Code:

---

mouse_x = event->pos().x();   mouse_y = event->pos().y();
AFT.map(mouse_x,mouse_y, &real_x, &real_y);

---

My world is : -70,70,30,30 (xmin,xmax, ymin,ymax) , a widget size of 600x300 and center of my world 0,800.
I draw a line from -70,790 to 70,810 without any problem
I have real coords in range : 300 3000 (x) 3200 - 4000 ?????

My code was exactly as one I have developed on Java. Java has AFT.inversetransform (and it worked fine )
Thanks.