Thumbnail touch not sensitive

manwon
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IP: 192.168.0.71 8 years 5 months ago - 8 years 5 months ago #12953 by manwon

Thumbnail touch not sensitive was created by manwon

My apps has many pdfs. Some pdf only have image. When I open the image pdf, the thumbnail touch will be too slow. Below video link is my situation.
Video

How can I improve it?
Thanks.

Last edit: 8 years 5 months ago by manwon.

emanuele
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IP: 192.168.0.71 8 years 5 months ago #12957 by emanuele

Replied by emanuele on topic Thumbnail touch not sensitive

Hi,

you can edit OnNoneTouchEnd method in PDFView class that recognises single tap event.
You can set the time gap and the maximum finger movement allowed to fire the single tap event:

Code:

if( timeStamp - m_tstamp_tap < 0.15 )//single tap
    {
        bool single_tap = true;
        if( dx > 5 || dx < -5 )
            single_tap = false;
        if( dy > 5 || dy < -5 )
            single_tap = false;
        if( single_tap )
        {
            [self onSingleTap:point.x :point.y];
        }
    }

manwon
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IP: 192.168.0.71 8 years 5 months ago #12958 by manwon

Replied by manwon on topic Thumbnail touch not sensitive

Hello, I don't understand why set the timestamp condition. And what is dx and dy.
Thanks.

emanuele
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IP: 192.168.0.71 8 years 5 months ago #12961 by emanuele

Replied by emanuele on topic Thumbnail touch not sensitive

the timestamp condition is the time gap allowed from touchesBegan and touchesEnded events (the duration of the finger on the screen).
dx and dy are finger movements gap from touchesBegan and touchesEnded events.

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