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enter image description here

I am not talking about just resize the image,

I want to zoom in the price, then people focus on that price.

I want to do a resize action, then data will reload the specify area of the chart.

Similar as this application: http://itunes.apple.com/us/app/chart-tool/id366727994?mt=8 enter image description here

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You can zoom in by adjusting the plot ranges on the plot space. Reduce the length of the range to zoom in and increase it to zoom out. No need to reload the data unless you want to add more detail (== more data points) at the higher zoom level.

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Do you have a example for this? Because –  nullmicgo Oct 6 '11 at 3:53
Because i don't understand how to detect user use finger to do a Enlarge Action and change the plot range of the plot space....thank you –  nullmicgo Oct 6 '11 at 3:54
Pinch-zoom is handled automatically and should be enabled by default. Set allowsUserInteraction = YES; on your plot space to allow the user to scroll the plots by touching the plot space and dragging with their finger. –  Eric Skroch Oct 7 '11 at 0:06
thank you very much! it works now!!! thank you!!! –  nullmicgo Oct 7 '11 at 6:18
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