OptionGroup Control Properties, Methods, and Events
Properties
Methods
| AddObject | AddProperty | CloneObject |
| Drag | Move | OLEDrag |
| ReadExpression | ReadMethod | Refresh |
| RemoveObject | ResetToDefault | SaveAsClass |
| SetAll | WriteExpression | WriteMethod |
| ZOrder |
Events
Example
The following example creates an OptionGroup control and places the control on a form. The OptionGroup control has three buttons, and depending on the option button you click, a circle, ellipse, or square is displayed. The Buttons and Caption properties are used to specify the text displayed next to each option button.
The Shape control is used to create the circle, ellipse, and square. The OptionGroup control's Click event uses a DO CASE ... ENDCASE structure and the Value property to display the appropriate shape when you click an option button.
frmMyForm = CREATEOBJECT('Form') && Create a Form
frmMyForm.Closable = .F. && Disable the Control menu box
frmMyForm.AddObject('cmdCommand1','cmdMyCmndBtn') && Add Command button
frmMyForm.AddObject('opgOptionGroup1','opgMyOptGrp') && Add Option Group
frmMyForm.AddObject('shpCircle1','shpMyCircle') && Add Circle Shape
frmMyForm.AddObject('shpEllipse1','shpMyEllipse') && Add Ellipse Shape
frmMyForm.AddObject('shpSquare','shpMySquare') && Add Box Shape
frmMyForm.cmdCommand1.Visible =.T. && "Quit" Command button visible
frmMyForm.opgOptionGroup1.Buttons(1).Caption = "\<Circle"
frmMyForm.opgOptionGroup1.Buttons(2).Caption = "\<Ellipse"
frmMyForm.opgOptionGroup1.Buttons(3).Caption = "\<Square"
frmMyForm.opgOptionGroup1.SetAll("Width", 100) && Set Option group width
frmMyForm.opgOptionGroup1.Visible = .T. && Option Group visible
frmMyForm.opgOptionGroup1.Click && Show the circle
frmMyForm.SHOW && Display the form
READ EVENTS && Start event processing
DEFINE CLASS opgMyOptGrp AS OptionGroup && Create an Option Group
ButtonCount = 3 && Three Option buttons
Top = 10
Left = 10
Height = 75
Width = 100
PROCEDURE Click
ThisForm.shpCircle1.Visible = .F. && Hide the circle
ThisForm.shpEllipse1.Visible = .F. && Hide the ellipse
ThisForm.shpSquare.Visible = .F. && Hide the square
DO CASE
CASE ThisForm.opgOptionGroup1.Value = 1
ThisForm.shpCircle1.Visible = .T. && Show the circle
CASE ThisForm.opgOptionGroup1.Value = 2
ThisForm.shpEllipse1.Visible = .T. && Show the ellipse
CASE ThisForm.opgOptionGroup1.Value = 3
ThisForm.shpSquare.Visible = .T. && Show the square
ENDCASE
ENDDEFINE
DEFINE CLASS cmdMyCmndBtn AS CommandButton && Create Command button
Caption = '\<Quit' && Caption on the Command button
Cancel = .T. && Default Cancel Command button (Esc)
Left = 125 && Command button column
Top = 210 && Command button row
Height = 25 && Command button height
PROCEDURE Click
CLEAR EVENTS && Stop event processing, close Form
ENDDEFINE
DEFINE CLASS shpMyCircle AS SHAPE && Create a circle
Top = 10
Left = 200
Width = 100
Height = 100
Curvature = 99
BackColor = RGB(255,0,0) && Red
ENDDEFINE
DEFINE CLASS shpMyEllipse AS SHAPE && Create an ellipse
Top = 35
Left = 200
Width = 100
Height = 50
Curvature = 99
BackColor = RGB(0,128,0) && Green
ENDDEFINE
DEFINE CLASS shpMySquare AS SHAPE && Create a square
Top = 10
Left = 200
Width = 100
Height = 100
Curvature = 0
BackColor = RGB(0,0,255) && Blue
ENDDEFINE