ITT Rule IDL Version 7.0 User Manual download pdf (Page 416)

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416 Appendix B: iTool Compound Widgets

CW_ITWINDOW iTool Developer’s Guide

CW_ITWINDOW

The CW_ITWINDOW function creates an iTool draw widget that contains an

IDLitWindow object.

Warning

This routine can only be used in the context of a user-created iTool. See “Overview

of iTools Compound Widgets” on page 398 for details.

The CW_ITWINDOW widget automatically performs the following actions:

1. Creates a scrolling draw widget with the specified dimensions.

2. Adds itself as an observer of the underlying IDLitWindow object. The

CW_ITWINDOW widget listens for the following message:

See “iTool Messaging System” on page 41 for a discussion of observers and

notifications.

3. Handles all mouse and keyboard events. See “IDLitWindow” (IDL Reference

Guide) for a list of the mouse and keyboard callback methods.

Resizing CW_ITWINDOW Widgets

CW_ITWINDOW does not automatically resize itself to fit its parent widget. To

resize the widget, your base widget must call the CW_ITWINDOW_RESIZE

procedure with the new size. This procedure has the following interface:

CW_ITWINDOW_RESIZE, Widget_ID, Xsize, Ysize

where Widget_ID is the CW_ITWINDOW widget ID, and Xsize and Ysize are

the new visible size of the draw window.

Syntax

Result = CW_ITWINDOW(Parent, UI [, DIMENSIONS=[width, height]]

[, VIRTUAL_DIMENSIONS=[width, height] ] [Also accepts all

WIDGET_DRAW keywords])

Message Value Description / Result

CONTEXTMENU Menu identifier Change the current context menu.

Table B-5: Messages Understood by CW_ITWINDOW

1 2 ... 411 412 413 414 415 416 417 418 419 420 421 ... 429 430

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ITT Rule IDL Version 7.0 User Manual Page 416

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