Exercises, examples and other material relating to training module T221. This topic is presented on public course Tcl/Tk
In Tcl/Tk, you'll often want pull-down menu selection. Briefly, you'll use a menu bar which comprises a number of menus. Each menu will comprise a number of menu items, some of which may be submenus. And each menu item will have an action associated with it. In this module, you learn the mechanisms used to create menus, and you learn programming techniques to allow you to create a flexible, maintainable menu system too.
|Articles and tips on this subject||updated|
|1475||Tcl/Tk - updating your display while tasks are running|
Let me make two statements:
1. When you are popping up a new window from your program, the very last thing you want to see happen is for the window to gradually appear, with bits of it being resized as it comes on the screen - not only is such an operation irritating on the eye, but also it's burning ...
Examples from our training material
|idletasks|| use of update idle tasks to update the display|
|mb1|| First menu button|
|mb2|| Various options for menu buttons|
|mb3|| Menu bar system based on array or lists|
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Topics covered in this module
Simple pulldown menu.
Options for pulldown menus.
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