Viewer styles demo bug on ipad?

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Tuesday, January 9, 2018 11:57:31 AM(UTC)

aida

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Posts: 9

On the Styles Demo the mouse location label is not working on an ipad.
Is this a bug in Leadtools or an incorrect event in jquery?


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#2 Posted : Thursday, January 11, 2018 10:41:26 AM(UTC)

Walter

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Hello,

When you say the label "is not working", what exactly do you mean?

I tested this here on an iPad Mini, and observed the mouse location to be reported as unknown. Given that there is no mouse on a touch enabled device, this would seem appropriate.

What are you expecting the label to display? Also, are you having a similar issue in your own application that you are trying to better understand? If so, can you explain the issue you are having with your application in greater detail?

Walter Bates
Senior Support Engineer
LEAD Technologies, Inc.

#3 Posted : Thursday, January 11, 2018 4:30:41 PM(UTC)

aida

Groups: Registered
Posts: 9

Thanks for rely.
I mean as you observe, mouse location unknown.

Yes I am having the same problem in my application, it works fine on a desktop but not the iPad.
I want the label to display the x,y coordinates of the pixel in an image.

I have tried it with the code from the example folder but added click, mouseclick and tap events to the line
$(this._imageViewer.eventCanvas ? this._imageViewer.eventCanvas : this._imageViewer.foreCanvas).mousemove(function (e) {
When I add a 'click' event to another element the event is raised on the iPad.

Currently trying to get a mac running so can run a debugger on the iPad to see what is going.
Was wondering if the control was handling the events and not passing them on.

Thanks

#4 Posted : Friday, January 12, 2018 9:36:02 AM(UTC)

Walter

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Posts: 366

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Was thanked: 4 time(s) in 4 post(s)

The mousemove event you are subscribing to (as illustrated by our ImageViewerStyles demo) is native to the HTML5 Canvas. This event is specific to the mouse, so it won't work on an iPad.

I would recommend using the InteractiveService object to subscribe to the tap and perhaps the dragStarted events for use on both desktop and the iPad also. You can get access to these through the imageViewer.interactiveService property. With this event, you can use the InteractiveEventArgs.Position to update where the user is using the mouse or their finger.

For a working example of how to use this service, you can check out the JS Annotations demo.

Walter Bates
Senior Support Engineer
LEAD Technologies, Inc.

#5 Posted : Wednesday, January 17, 2018 10:37:20 AM(UTC)

aida

Groups: Registered
Posts: 9

Thanks Walter, that works.

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