Clich here for an overview of the differences and similarities between the various components that provide selection list and input box capabilities.
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| The Drop Down List component offers a facility to select a value from a
pre-defined set of possible values. Clich here for an overview of the differences and similarities between the various components that provide selection list and input box capabilities. |
The Drop Down List is almost the same as the list box. The difference is that the Drop Down List allows a choice to be erased after a value has been selected.
Hint: If the list of possible values is "only two possible values", a Check Box might be preferrable. When the list is up to five, the Radio Button is probably the best approach. Up to a couple of dozen, the List Box or Drop Down List is the best way, and if the list is even longer, the Long List Box is to be preferred.
The events that are recognized for components of the type Dropdown are: Create, Destroy, Enter, Exit, change, deselect, gotFocus, help, lostFocus and select.
The default property for a drop down list is Value.
The property list for a drop down list is:
| Property Name (MSM-Workstation) | Property Name (MWAPI) | Default Value | Value Range |
|---|---|---|---|
| Active | ACTIVE | Boolean value | |
| BackColor | BCOLOR | Color | |
| Cancel | CANCEL | Boolean value | |
| Changed | CHANGED | Boolean value | |
| ChoiceField | Field | ||
| ChoiceVar | Field | ||
| Container | Free text | ||
| DataField | Field | ||
| DisplayOnly | CANCHANGE | Boolean value | |
| FontBold | FSTYLE | Boolean value | |
| FontFace | FFACE | Font face | |
| FontItalic | FSTYLE | Boolean value | |
| FontSize | FSIZE | Font size | |
| FontUline | FSTYLE | Boolean value | |
| ForeColor | FCOLOR | Color | |
| Message | ZMESSAGE | Free text | |
| Name | Name of component (current window) | ||
| NextControl | NEXTG | Name of component | |
| Pointer | PTYPE | Pointer (extended) | |
| PosLeft | POS | Positive numeric value | |
| PosTop | POS | Positive numeric value | |
| PosUnits | POS | Unit Specification | |
| SizeHeight | SIZE | 40 | Positive numeric value |
| SizeUnits | SIZE | Unit Specification | |
| SizeWidth | SIZE | 40 | Positive numeric value |
| TBackColor | TBCOLOR | Color | |
| TFontBold | TFSTYLE | Boolean value | |
| TFontFace | TFFACE | Font face | |
| TFontItalic | TFSTYLE | Boolean value | |
| TFontSize | TFSIZE | Font size | |
| TFontUline | TFSTYLE | Boolean value | |
| TForeColor | TFCOLOR | Color | |
| TabStops | ZTABSTOPS | Tabulator stops | |
| Title | TITLE | [Title] | Free text |
| TitlePos | TPOS | Title position | |
| Type | TYPE | LISTBUTTON | Type of component |
| Units | UNITS | Unit Specification | |
| Value | VALUE | Item in list of choices | |
| VarName | Name of variable | ||
| VarPermanent | Boolean value | ||
| Visible | VISIBLE | Boolean value | |
Go back to the alphabetic list of components.