Zooming a paricular selected region

[Kapil]

Hi...

I want to zoom a particular selected region and set that into display...
with the help pf mousemove event i have set the points that are selected..
Now when i call my zoom event it should only zoom the selected region and show it and not zoom the entire canvas...
its something like creation of a new view on the canvas which would show the selected region on the canvas..
how do it do that...

Thanking you..
Kapil

[wysota]

But do you want to zoom or clip (crop)?

[Kapil]

But do you want to zoom or clip (crop)?

Hi..

I want to zoom a selected part on the canvas and the entire canvas..
its like whenever i select a potion and press the zoom button, that part is only zoomed to scale level 3 and not anyother part of the canvas....

clip(crop)---> ??????

with regards,
Kapil

[wysota]

Could you provide some image with an example of what you want?

[Kapil]

Hi..

In the image attached, i want to just zoom the rectangle in the center and not the lines arnd it...
with the worldmatrix and scale function the entire canvas gets zoomed.. i just want this item to get zoomed and shown on the viewport or say on the screen provided..
how do i do it....


kapil

[wysota]

A... ok. So you can't do it with QCanvas :) The best way would probably be to create a widget on top of the item and paint the zoomed part on it or create another canvasview and show only the part of the canvas you want (zoomed of course).

[Kapil]

Hi...

Creating another View and showing the rectangle in a zoomed format on it ?????

How do i call the canvas object on a new view wherein it is shown only....

object is unique to a view... how can i pass the same canvas item to two different views, one in normal and the other in zoomed format...

can u help me out with some doc or info on it... i read the Qcanvas and the QCanvasView docs...

Kapil

[wysota]

object is unique to a view...
No, it's unique to a canvas.


how can i pass the same canvas item to two different views, one in normal and the other in zoomed format...
Didn't I already answer that question for you today?
http://www.qtcentre.org/forum/showthread.php?t=2140

[Kapil]

hi..

yaa u did answer that... so sorry for the repitition...
i would it this way..

Thanks a lot..
with regards,
Kapil