[Lazarus] SVG Object

Steve Gatenby steveg at nevets.com.au
Tue Jan 18 00:37:24 CET 2022

Thanks Marc - seems I will need to stick with what I have then.

Currently I am pulling all object info from the SVG into an array and 
assigning quadrant positions.

Then do best guess by relative quadrant of mouse click position - works 
fine, but feels sloppy :)

On 17/1/22 8:55 pm, Marc Weustink via lazarus wrote:
> I'm afraid there is no easy solution for that. SVGs are rendered from 
> the first element to the last, where ever element (atleast in theory) 
> can be a part of a given pixel. SVG elements do have a 
> x,y,width,height but they may also be part of one or more 
> transformations.
> To give you an idea, the (browser)app I'm currently working on 
> displays several object, where every object has an origin(x,y) of 0,0 
> and they are finally placed by translations.
> The easiest way (if you are in a browser context) is to add an onclick 
> handler to your elements of interest.
> Marc
> On 16-1-2022 23:34, Steve Gatenby via lazarus wrote:
>> Not sure if this is the right place to ask about this one -
>> I am using the BCSVGViewer from bgra controls - for SVG viewing 
>> obviously :)
>> Would anybody know if there is a method to retrieve the object 
>> (within the svg) at specified x,y ?
>> or is it possible to use embedded links within the svg ?
>> I am looking to find which object has been clicked on within the svg 
>> to create a 'clickable' map
>> Any suggestions on a better place to post this also appreciated
>> Regards SteveG

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