topic Re: Use Python to zoom into Active Data Frame in ModelBuilder Questions

Use Python to zoom into Active Data Frame

RichardDaniels — Thu, 03 May 2018 17:49:03 GMT

I'm trying to automate some tasks for unit test. Once of these tasks is zooming into a map a fixed amount and forcing ArcMap to redraw at the new extent. The Data Frame is named Raster Data Sets.

The display is refreshing but it does not appear to honor the panToExtent() method. The AddMessage command shows that the value for the extent class was changed as expected.

ideas?

import arcpy

zoomScale=arcpy.GetParameterAsText(0)

mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd, "Raster Data Sets")[0]
lyr = arcpy.mapping.ListLayers(mxd, 'County Boundaries*', df)[0]
ext = lyr.getExtent()
arcpy.AddMessage("Old xmin, ymin, xmax, ymax: " + str(ext.XMin) + ", " + str(ext.YMin) + ", " + str(ext.XMax) + ", " + str(ext.YMax))

# change extent
temp = ext.XMin + float(zoomScale)
ext.XMin = temp
temp = ext.YMin + float(zoomScale)
ext.YMin = temp
temp = ext.XMax - float(zoomScale)
ext.XMax = temp
temp = ext.YMax - float(zoomScale)
ext.YMax = temp
arcpy.AddMessage("New xmin, ymin, xmax, ymax: " + str(ext.XMin) + ", " + str(ext.YMin) + ", " + str(ext.XMax) + ", " + str(ext.YMax))

df.panToExtent(ext)
arcpy.RefreshActiveView()

sys.argv[2]=True
arcpy.SetParameter(1,"True")

Re: Use Python to zoom into Active Data Frame

DanPatterson_Retired — Thu, 03 May 2018 21:02:43 GMT

So it doesn't recenter?

Pans and centers the MapFrame using a new Extent object without changing the map frame's scale.

Re: Use Python to zoom into Active Data Frame

RichardDaniels — Thu, 03 May 2018 22:27:01 GMT

It redraws but it does not appear to be resulting in the desired behavior (zoom into the new map extent).

Re: Use Python to zoom into Active Data Frame

DanPatterson_Retired — Thu, 03 May 2018 22:40:51 GMT

you might have a weird combo of extents... give

zoomToAllLayers ({selection_only}, {symbolized_extent})

from http://pro.arcgis.com/en/pro-app/arcpy/mapping/mapframe-class.htm

there is an equivalent for arcmap's arcpy mapping module