MapBasic - Dialog box - Dropdown menu with column names
Jamie
1st drop down to select map window
2nd drop down menu to choose table from those already open
3rd drop down to select columns from the above table
can any one give any guidance or show me some example code to achieve this.
Thomas Bacon
Hi Jamie,
Here’s an example I made for someone a while ago which shows how to update a ‘Columns’ dropdown when the ‘Tables’ dropdown selection is changed. Hopefully it will give you enough info to work out how to do the same with the map window etc…
The code is well commented but if you have any questions then do ask.
Tom Bacon
GIS Engineer, Mouchel
T 01444 472380 │ E thomas...@mouchel.com │ W www.mouchel.com
Our values: innovation │ excellence │ integrity │ responsibility
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Jamie
Thanks Tom just what i was after.
a follow up question i am in the process of making a tool to jump to each row of a table in turn, create a screenshot and save the image with the name found in the column the user chose.
how can i extract the field contents?
i'm looking for something similar to this i guess - SvNam = Zones.selectedColumn (in my case the field name is SPS_Code and is COL4 though this could change based on what the user selects)
Where Zones is my current row selection
and selected column should be the one chosen earlier by the user using your dialog box you posted.
Jamie
Jamie
COL_REF = ColumnInfo(selectedTable, selectedColumn, COL_INFO_NUM)
The problem i've got now is that my command is being run as a string so it sees "Zones.COL4" as a string rather than dynamically filling in the fields contents. so my output file is just "Zones.COL4.jpg" rather than "Zones.x.jpg"
i know this should work i'm sure i'm just doing something wrong. if i just use Zones.COL4 in the command below it works.
SvWin = "Save Window " & nMID & " As " + chr$(34) & File_Dir + "Zones." + ("COL" & COL_REF) + ".JPG" + chr$(34) + " Type ""JPEG""" + " Resolution 150"
Note SvWin
Run Command SvWin
Peter Horsbøll Møller
The Alias variable to the rescue!
Dim aCol As Alias
…
aCol = "Zones.COL" & COL_REF
SvWin = "Save Window " & nMID & " As "
+ chr$(34) & File_Dir + aCol + ".JPG" + chr$(34)
+ " Type ""JPEG""" + " Resolution 150"
Hope this helps
Peter Horsbøll Møller
GIS/LI Presales Specialist
Location Intelligence | MapInfo
M: +45 29 133 769
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Jamie
any top examples on when these would be useful? could be an interesting article for the 'Monthly' MapInfo Journal
Peter Horsbøll Møller
Jamie,
I did cover the Alias variable in my most recent post on LinkedIn:
https://www.linkedin.com/pulse/4-typical-questions-when-writing-mapbasic-peter-horsbøll-møller
Peter Horsbøll Møller
GIS/LI Presales Specialist
Location Intelligence | MapInfo
M: +45 29 133 769
peter....@pb.com | @phorsbollmoller
pitneybowes.com/dk | mapinfo.com
From: mapi...@googlegroups.com [mailto:mapi...@googlegroups.com]
On Behalf Of Jamie
Sent: 30. juni 2015 14:08
To: mapi...@googlegroups.com
Subject: Re: [MI-L] MapBasic - Dialog box - Dropdown menu with column names
Perfect again Peter. I had come across Alias's before but had never really known when to use them. Think i'll need to go back to the user guide to get some more info on this.
any top examples on when these would be useful? could be an interesting article for the 'Monthly' MapInfo Journal
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