How to set X and Y positions with VGA_text object ***SOLVED***

Crosswinds

Hello.

Im currently using VGA_text object in my project.

And the only thing that im missing now is to move around the text "cursor" on the screen.




For example

first i print "hello" in the top left corner (thats simple)


But then i want to move the cursor so that i can print "everyone"in the bottom right corner,(or somewere else for that matter[noparse]:)[/noparse])


Thanks


Post Edited (Crosswinds) : 4/17/2010 7:41:37 PM GMT

James Newman

Look at VGA_Text.spin. The 'out' function provides this functionality, and is well documented in the source.

Crosswinds

Hello James, thank you for your answer.


Yes i have seen this, but i cant figure out how to use it actually..

it says:

$0A = set X position (X follows)
$0B = set Y position (Y follows)

But what should the syntax look like?


For example:

vga.out($0A) send $0A to it, but where, and how should i enter the X position?

JRetSapDoog

Hi, Crosswinds. You've probably figured this out already, but you send the X value immediately afterwards, and similarly for the y-axis. In other words, the $0A and $0B values "prime" the procedure to respectfully expect the X and Y coordinates immediately afterwards (i.e., failure to follow through and send a coordinate value after sending either $0A or $0B would be a logic error).

So, for example, to move the cursor to row 5, column 10, for an object named vga you'd issue: vga.out($0A); vga.out(10); vga.out($0B); vga.out(5), with those instructions on four separate lines (decimal or hex can be used for the coordinates). That should (don't have a test board handy, ha) set the cursor such that the next vga.out printing instruction should take place at the set cursor position. Regarding the documentation, in that the procedure only takes one parameter/argument, you have to use a second .out instruction to send the coordinate. Again, the procudure will remember that you've sent either $0A or $0B and be expecting the actual coordinate value. Incidentally, as I recall, you can set the X- and Y-coordinates independently. That is, nothing compells you to set both at (nearly) the same time. They are set independently. If you only change one, the other will retain its value. Onward and upwards.

James Newman

Yep, this is a snippet of code from an old project:
'display.out($0A) 'Set X
'display.out(0)
'display.out($0B) 'Set Y
'display.out(2)

That set the draw location to 0,2 so I could draw an alert. Right afterwards is a display.str(). It was commented out in favor of some constants that defined where the alert was located, along with some logic to center it.

Crosswinds

Thanks guys! That is exactly what i was looking for!


Case solved [noparse]:)[/noparse]

Giemme

Hi Crosswinds

I wrote this small subroutine to use it everywhere in the programm:

PUB Plot (x,y)
display.out($0A) 'Set X
display.out(x)
display.out($0B) 'Set Y
display.out(y)

Regards
Gianni