Values persisted in "Open Local Dataset" window

[HelenClifton]

Expected behavior

Each time “Open Local Dataset” window is opened, the values contained in it should be cleared / reset.
(An exception might be the temporal and regional constraints)
See also #307

Actual behavior

The following values in the “Open Local Dataset” window are persisted the next time the window is opened:
• Time Constraints (if set)
• Region Constraints (if set)
• Variable Constraints (if set)

This can have some unwanted effects :
• Time Constraints which were correct for the old dataset, are now are shown as “out of range” if the new dataset has different temporal coverage.
• Variables are still selected from the old dataset even if they don’t exist in the new one

Steps to reproduce the problem

Note: It is necessary to first create two new local datasets – that is purpose of steps 1 to 7

1. Open GUI

2. From ESA CCI Open Data Portal list, select esacci.OZONE.mon.L3.NP.multi-sensor.multi-platform.MERGED.fv0002.r1 then click on “Download and/or open remote dataset”

3. In the “Download Data Source”, enter:
   • Deselect time, region, variable constraints.
   • Change Unique ID to: local.ozone
   • Data source title: leave blank
   • Leave “Open after Download” unselected
   • Click “Download”

4. Wait for download to be completed.

5. From ESA CCI Open Data Portal list, select esacci.CLOUD.mon.L3C.CLD_PRODUCTS.MODIS.Aqua.MODIS_AQUA.2-0.r1 then click on “Download and/or open remote dataset”

6. In the “Download Data Source” window:
   • Time constraint: 2003-01-01 to 2003-03-31
   • Region constraint: lat: -100 to 0, lon. -70 to 0
   • Deselect variable constraints.
   • Change Unique ID to: local.cloud
   • Data source title: leave blank
   • Leave “Open after Download” unselected
   • Click “Download”

7. Wait for download to be completed.

8. From local data store list, select local.ozone then “Open local dataset”

9. In the “Open local dataset” window, enter:
   • Time constraint: 2008-01-01 to 2008-03-01
   • Region: Lon. from -90 to 90, lat. from -60 to 60
   • Select variables: O3_du, O3_du_tot
   • Click “Open Local”

10. Now select local.cloud then “Open local dataset”

11. In the “Open local dataset”, observe:
    • Time constraint: Out of range
    • Region: Lon. from -90 to 90, lat. from -60 to 60 (as before, although max lat/lon is out of range for Cloud dataset)
    • Variables: O3_du, O3_du_tot (as before, but these variables don’t exist in Cloud dataset)

Specifications

Cate 0.9.0-dev.4
Windows 7 Professional

[HelenClifton]

Confirmed fixed in cate.0.9.0.dev.6