ListBox, ComboBox, Menu

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ListBox, ComboBox, Menu
Chapter 5.4, 12.1
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ComboBox Control Properties Methods

• Combines TextBox features with a short drop-down
  list
• cboOne.AddItem(string)
• List
• Strings displayed in the ComboBox, as an array
• cboOne.List(3)
• ListCount
• Contains the number of list items
• ListIndex
• Index of the selected item

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ComboBox Control Properties Methods

• Locked
• When True user can not type data in the ComboBox
• Sorted
• When True items in the list are sorted
• RemoveItem
• Removes an item from list
• Clear
• Removes all items from the list

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ComboBox Styles

• DropDown
• Allows user entry
• Simple
• Visual appearance of a textbox
• Items are listed by arrow keys
• Allows user entry
• DropDownList
• Does not allow user entry
• Fast movement to an item by first character

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ListBox Control

• Let user to view a list of items
• Allow user to select one or more items
• lstOne.AddItem(string)
• List
• Strings displayed in the list, in an array like
  form
• lstOne.List(3)
• ListCount
• Contains the number of list items
• ListIndex
• Index of the selected item
• What if more than one item is selected?

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ListBox Control Properties Methods

• Selected
• Array of Boolean values
• Each is set to true only if the corresponding
  element is selected
• MultiSelect
• Specifies whether user can select more than one
  item
• SelCount
• Number of list items selected
• Sorted
• When True items in the list are sorted
• RemoveItem
• Removes an item from list
• Clear
• Removes all items from the list

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ListBox Styles

• None
• Does not allow multiple selection
• Simple
• Allows multiple selection
• Selection is done by mouse or Space bar
• Extended
• Allows multiple selection
• Selection is done by mouse or Space bar
• Holding the Shift key and selecting an item
  selects all items between the last selection and
  the current selection

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Menu Editor

• There are 3 ways to start menu editor
• Click the Menu Editor button on the toolbar
• Choose Tools/Menu Editor
• Press CtrlE
• Each line of text in a menu is a Menu Control

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Menu Control Properties

• Caption
• Actual text displayed in the menu item
• Name
• Unique identifier used by the program
• Index
• Used if menu item is part of a control array
• Shortcut
• Key combinations can be set for shortcuts
• Checked
• When true, a check mark appears to the left of
  menu item

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Menu Editor Example