7.4.4 Interaction between custom widget and dialog box - Automatic data exchange
Custom widgets interact with dialog boxes and can display values or manipulate them.
Conditions
Automatic data exchange takes place under the following conditions:
Condition Direction
When starting or recompiling a dialog Dialog → custom widget
When executing the GC command for generating cycle calls Custom widget → Dialog
Programming
The following definitions are necessary for the interaction:
Expansion of the dialog configuration
Definition: DEF
(variable)
Syntax: (
(type)
//5/"","
(variable)
",""/wr2/)
Variable type: Type Standard input field (no grid or toggle) with any data type
(no W)
Parameters: Variable Any designation of a variable for data exchange
Input mode: wr2 Reading and writing
Example
DEF CUSVAR1 = (R//5/"","CUSVAR1",""/wr2/)
Expansion of the class definition
In the class definition of the custom widgets, a QProperty must be created whose name is
identical to the selected variable of the dialog configuration, e.g.:
Q_PROPERTY(double CUSVAR1 READ cusVar1 WRITE setCusVar1);
Example
The class definition of the dll file should look like this:
#define SLESTESTCUSTOMWIDGET_EXPORT Q_DECL_EXPORT
class SLESTESTCUSTOMWIDGET_EXPORT SlEsTestCustomWidget : public QWidget
{
Q_OBJECT
Q_PROPERTY(double CUSVAR1 READ cusVar1 WRITE setCusVar1);
....
....
}
Graphic and logic elements
7.4 Custom widgets
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178 Programming Manual, 10/2015, 6FC5397-3DP40-5BA3
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