ComboBox ControlDescription: | A ComboBox combines a text box with a list box. Text can be entered in the text box part or selected from the list box part. There are three styles of ComboBoxes: Simple DropDown DropDownList | |
Sample images: | ||
Simple style: |
| A text box with a list box. List always visible. |
DropDown style: |
| A text box with a drop-down list box. List only visible when drop down button pressed. Text can be entered that is not contained in the list. Control when list not selected. Control with drop down list selected and arbitrary text entered. |
DropDownList style: |
| A read-only text box with a drop-down list box. List only visible when drop down button pressed. Values in text box limited to values in the list. Control when list not selected. Control with drop down list selected. |
Details: | ||||
File formats: | Data for the lists can be loaded from text files, CSV (Comma Separated Values) files, and fixed text format files. Text files - As created with text editors like Notepad. Records are separated by carriage return, line feed bytes. CSV files - Text files with fields separated by commas. Fixed Length format files - Files with fixed length records not separated by any special characters. | |||
Fields: | CSV and Fixed Length formats allow you to select a particular field from the records to display in the list. Define the fields for Fixed Text format files using the RecordForm property. Only one field can be displayed at a time. Specify the field to be displayed using the CurFieldNo property. | |||
Records: | For Simple and DropDown styles you can access the whole of the record, whose field value is selected in the list box part. | |||
Filtered list: | For Simple and DropDown styles the values in the list box can be limited to match the characters in the text box part. When the IsQuery property is set to True, the list box part only displays items that start with the characters entered in the text box part. When users want to display all the items in the list (i.e. clear the filter), they should delete all the text in the text box part and press the ENTER key. | |||
Properties: | Array AutoLoadFile AutoSize BackColor ClassMajorVersion ClassMinorVersion ClassProgID Container CurFieldNo Enabled FileName | FileType Font ForeColor Height Highlight HighlightColor IMEMode Index IsQuery Left ListCount ListIndex | ListString Name Parent Printable QueryString RecordForm RenderText ScaleMode ScalingStyle SelField SelString | Sorted Style TabGroup TabIndex TabStop Text ToolTipText Top Visible Width |
Methods: | AddString ClearList DeleteString | InsertString LoadFile Move | Refresh SaveFile | SetFocus ZOrder |
Events: | Change Click DblClick Edit | GotFocus KeyDown KeyPress KeyUp | LostFocus MouseDown MouseMove MouseUp | Return SelChange |
Class ProgID name: | Fujitsu.PcobComboBox.4 | |||
Corresponding Controls in PowerCOBOL V3.0 or earlier: | Combo Box Item Selection Box Item | |||
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