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Tkinter is a GUI (graphical user interface) library in Python. Tkinter gives us a fast and easy way to build GUI-based applications. Tkinter also gives us a very powerful object-oriented interface to develop applications using GUI toolkits.
Exploring beneath the surface using interactive data transects
Published in Annals of GIS, 2021
In the input selection module, a window with four drop-down lists for selecting and ordering sub-surface layers as shown in Figure 2 will ‘pop up’ after clicking on the add-in toolbar. The pop-up window is implemented using the combobox widget in the ttk module of Tkinter package. Tkinter is a standard library, which is available with the installation of Python. However, the direct use of Tkinter as an add-in script to create a graphical user interface (GUI) will result in the ArcMap module crashing. To resolve this issue, the script for implementing the dialog window was put in a separate Python script file, which was then saved in the add-in’s Instal directory. The dialog is launched in a sub-process, and then the names of input layers are stored as a list and pass back to the add-in script using the communicate method in the Popen class of the sub-process module. Currently, the maximum number of input layers for the transect tool is four; this limit could be increased but four layers are sufficient to demonstrate the utility of the tool. If there are fewer than four layers, the user would complete the drop-down list from the bottom layer to the top layer, and leave the remaining layers blank. The choices of each drop-down menu are the names of the raster layers that exist within the active data frame of the current map document; thus, the sub-surface datasets need to be added in ArcMap before applying the transect tool.