ITT Rule IDL Version 7.0 User Manual download pdf (Page 393)

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Appendix A: Controlling iTools from the IDL Command Line 393

iTool Developer’s Guide Selecting Items in the iTool

Selecting Items in the iTool

When you execute an operation in an iTool, the operation will be applied to the

currently selected item. You can use the Select method of the IDLitVisualization

class to ensure that the correct item is selected.

To select an item, do the following:

1. Find the object’s full identifier as described in “Retrieving Component

Identifiers” on page 382. Note that only visualizations and annotations can be

selected.

2. Get an object reference to the object using the GetByIdentifier method of the

IDLitContainer class.

3. Call the Select method.

Example: Selecting an Item Programmatically

For example, suppose you create an iPlot tool with two plot lines, using the following

statements:

IPLOT, RANDOMU(seed, 15)*FINDGEN(15)

IPLOT, FINDGEN(15), /OVERPLOT

After these statements have been executed, the second (straight) plot line will be

selected in the tool. To select the first plot line, you would use the following

statements:

idTool = ITGETCURRENT(TOOL=oTool)

plotIDs = oTool->FindIdentifiers('*plot*', /VISUALIZATIONS)

plotObj0 = oTool->GetByIdentifier(plotIDs[0])

plotObj0->Select

To apply the smooth operation to the first plot line (which has now been

programmatically selected), setting the value of the SHOW_EXECUTION_UI

property to 0 (False), you would use the following statements:

idSmooth = oTool->FindIdentifiers('*smooth', /OPERATIONS)

success = oTool->DoSetProperty(idSmooth, 'SHOW_EXECUTION_UI', 0)

success = oTool->DoAction(idSmooth)

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ITT Rule IDL Version 7.0 User Manual Page 393

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