How to detect when a map window has finished rendering?
Nicholas G Lawrence
Hello all,
I want to write a mapbasic script that opens a table, opens a map window, zooms to the full extent and captures how many seconds it takes to render.
My issue is, that mapinfo goes onto the next step (which is capturing the elapsed seconds) whilst the map window is still rendering. So I do not capture the elapsed time properly.
Is there a way for mapbasic to detect when a map window has finished rendering?
Nick Lawrence
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Engineering & Technology | Transport and Main Roads
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Sergi Gàmiz Ribelles
Peter Horsbøll Møller
Hi Nick
There is a MapDraw event described in the MapInfo Pro Extensibility Reference help that can help you.
This event gets fired when a map starts getting redrawn, finishes getting redrawn and has its redraw cancelled.
I have sketched the process in the attached sample app.
However, it fails to register the events for some reason that I can’t figure out.
I have asked around internally but maybe one of you can figure out what I’m doing wrong
Cheers
Peter
From: 'Nicholas G Lawrence' via MapInfo-L <mapi...@googlegroups.com>
Sent: Wednesday, 4 January 2023 04.23
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Subject: [MI-L] How to detect when a map window has finished rendering?
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Peter Horsbøll Møller
Hi again
I got some help making it work.
It can no show you the time spent rendering the map and it’s layers.
Do not that it will show a value for each layer
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Nicholas G Lawrence
HI SGR,
I did do the Timer() function twice in my original code.
The problem is that MapInfo runs the rendering of the map window in parallel, and the second Timer() is captured whilst the Map Window is still rendering.
I have figured out a solution though.
I use a Save Window command to save the window as an image file (to a temporary folder)
Then I run the Timer() command
Because the Save Window can only happen after the map window has complete rendering, this forces the Timer() to only run after the rendering is finished
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