ViewPort Properties

**Kapil** · 20th March 2006, 09:21

Hi,

I went thru the QCanvas class definition but then which of the function can provide me with the functionality of View Port.

I do not want to show the entire picture 'coz my image file which is dynamically generated is very Big and takes long CPU time to get executed.
So i just want to create that part of image which is currently on display on screen dynamically.

Moment the user scrolls from left to right or top to bottom, the image for the new region gets created. This helps me from saving major time of execution.

I could not locate any similar function in QCanvas which could help me in it.

Kapil

**jacek** · 20th March 2006, 15:41

QCanvas draws only those items that are visible.

**Kapil** · 22nd March 2006, 05:06

Hi,

i tried using the qcanvas but it gives the error that "qcanvas.h" not found.. i checked in the include folder where i have installed QT and actually there were no qcanvas and related header files present...

I am using the opensource windows version of QT4.1.1 with mingw...

I dont know from where to get the entire package of QCanvas header files...

please tell me how can i get them..

Kapil