Android and zoom with 2 finger control
lazarus / 43-Android

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xinyiman · 2019-10-25 10:05

Hi guys, I have the following need. Display an image (the source is in
base64) and then be able to zoom the image perhaps using the classic
2-finger control. Are there any examples to do this?

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xinyiman · 2019-10-28 08:49

No suggestion?

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jmpessoa · 2019-10-28 17:25

Hi, xinyiman!

You can try the demo "AppPinchZoomGestureDemo1"

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xinyiman · 2019-10-29 07:31

Now I look this example.

Thank you very much

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xinyiman · 2019-10-29 11:25

Hi jmpessoa, I tried the example and it works pretty well. Only two
things

1. the image should resize as I move my fingers and not to release

2. the image should zommare even if it exceeds the dimensions of the
panel, but facnedo see only the part on which I acted with the fingers

Is there such an example?

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jmpessoa · 2019-10-30 20:18

Hi, xinyiman!

Sorry, at the moment I dont have another "zoom" demo App...

but you can try pack your image in a html format and try load it using


jWebView1.LoadFromHtmlString(....)

or

jWebView1.LoadFromHmtFile(....)

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xinyiman · 2019-11-05 09:08

I did a lot of testing but I couldn't get the zoom solution correctly.
I think the problem is that the jImageView component always scales the
image to be displayed. Isn't there a way to see the unscaled image?
Then I'll do the related resizing. Or if you have other suggestions,
they are welcome.