I have a map where I graph a coordinate grid and some labets with the coordinates, I was guided by an example of infragistics.The problem is that I need to repaint the labels according to the zoom that I do with the mouse wheel.1- What is the correct way to do that?2- When I zoom in, the series disappear and the label series disappear, and when I zoom out, the series appear but incorrectly located
I am painting the series based on the ContentViewPort property of the map.
initial charge:
zoom in:
zoom out:
Hello Ricardo,
I have been investigating into the behavior you are reporting, and I’m a little unsure of what to recommend here as by your screenshots, I’m a little unsure what I’m looking at? I see in the tags of this post, you have included XamGeographicMap, but your screenshots don’t look like a XamGeographicMap to me?
You mentioned that you are painting labels and series onto the map in this case – are you doing this completely programmatically or are you using the actual series objects that we expose for you? I ask, as the ones that we expose for you should repaint normally when you zoom in or out. Would it be possible for you to please provide an isolated sample project that demonstrates what you are currently doing?
Please let me know if you have any other questions or concerns on this matter.
Hi, I am using shapefiles to load the xamgeographicmap, so in the background there are lines.The labels with coordinates are GeographicSymbolSeries and the gray lines (grid) in the background are GeographicPolylineSeries, generated according to the ContentViewPort. To create these gray lines (grid) in the background and the labels use an example that you have in "WPF Samples Browser 2021.1" called "map coordinate grid"
In theory, it shouldn't matter if I zoom in or zoom out, if I repaint the grid series or the labels that are based on the contentviewport they should look like the initial load, but when zooming in the series disappear and when zooming out appear, and when they appear they appear in a bad position.I draw the series based on the contentviewport because I don't know how to get the area inside the map correctly, since the actualworldrect always gives me the wrong value
here a total look at my screen:
Yes, sorry, since I started the publication, I have problems responding, I get a lower message on the right side indicating that an error occurred and I have to try many times, I attach it again, thank you.7571.WpfApp2.zip
Thank you for the sample project. I have been able to run the sample, albeit I had to make quite a few changes to the intervals on your GeographicCoordinatesGrid as I was receiving an OutOfMemoryException, likely due to the sheer amount of items that the application was trying to draw with an interval of .00035 while completely zoomed out. After changing this to 1, there still exists a huge number of items to be drawn, but at least the sample eventually runs.
Even after changing the interval though, I am able to reproduce the behavior you are seeing with the disappearing series after I try to zoom in or out. Interestingly, it seems that only the series across the top of the map disappears on my end. I will be testing this against our most recent versions to see if this behavior still exists there, as I see you are using version 18.1, which is no longer receiving active development at this time, and it is possible that this could've been a bug in that version. I will update this forum thread again soon with more information on this matter.
I have been investigating into the sample project you have provided a bit further and I have isolated it out into my own, much more simplified C# project, and I am able to reproduce the series disappearance there as well against the latest versions of Infragistics for WPF. For reference, I am attaching the sample project I split the behavior out to in case you would like to take a look as it does something very similar to what you are doing, but in a way that should be much more efficient.
This behavior is unexpected, and as such, I have asked our engineering teams to examine it further. To ensure it receives attention, I have logged this behavior in our internal tracking systems with a development ID of 273717. I have also created you a private support case that I will be linking this issue to so you can be notified when a fix or other resolution becomes available. This case has an ID of C-00221528 and you can access it after signing into your account on the Infragistics website here: https://account.infragistics.com/support-cases.
XamGeographicMapDisappearingLabelsTest.zip
Hello,I was able to transfer your most effective example to my project, but both series of coordinates disappear, I hope that the team can quickly solve the case, I appreciate your time and support.
I have received an update from our development teams on this matter. This behavior is actually expected, as the XamGeographicMap is set up such that it will omit markers when they are too close to the edge of the plot area. Our development teams have offered a workaround sample project that I am attaching here.
I hope this helps you. Please let me know if you have any other questions or concerns on this matter.
Fix_GeoMapDisappearingLabels.zip