Keeping Image On Screen

Getting Started Newbie Questions
#1

Hi all,

I have implemented pinch to zoom and it works great. I have also set the min and max scale for the group and I and able to keep the images from leaving the left side of the screen but I can not figure out how to keep the image on the right side of the screen.

Here is my code.

if group.x \< 0 and group.xScale == 1 then group.x = 0 end if group.y \< 0 and group.yScale == 1 then group.y = 0 end

I can keep it from going off the screen on the top and left but I can figure out the code to keep it from going off the bottom and right.

Can anyone help?

#2

Anyone?

#3

if group.x >= display.contentWidth and group.xScale == 1 then
group.x = display.contentWidth
end

if group.y >=display.contentHeight and group.yScale == 1 then

group.y = display.contentHeight
end

#4

why don’t you just add 2 more conditions?

Something like:

if group.x \> [put screenwidth here] and group.xScale == 1 then &nbsp; group.x = [your screenwidth] end &nbsp;
#5

Hi eriklen,

That much I know about. The trouble I’m having is when the object is scaled up via pinch-to-zoom. I’m not sure how to keep it on the screen when the scale is greater than 1. Any ideas?

Thanks

#6

Blondiemc9,

All display objects have width values and contentWidth values. contentWidth values are affected by scaling so it’s like you get the calculations for free.

if group.x+group.contentWidth*0.5>screen display width then
…

#7

Anyone?

#8

if group.x >= display.contentWidth and group.xScale == 1 then
group.x = display.contentWidth
end

if group.y >=display.contentHeight and group.yScale == 1 then

group.y = display.contentHeight
end

#9

why don’t you just add 2 more conditions?

Something like:

if group.x \> [put screenwidth here] and group.xScale == 1 then &nbsp; group.x = [your screenwidth] end &nbsp;
#10

Hi eriklen,

That much I know about. The trouble I’m having is when the object is scaled up via pinch-to-zoom. I’m not sure how to keep it on the screen when the scale is greater than 1. Any ideas?

Thanks

#11

Blondiemc9,

All display objects have width values and contentWidth values. contentWidth values are affected by scaling so it’s like you get the calculations for free.

if group.x+group.contentWidth*0.5>screen display width then
…