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# QtDoublePropertyManager Class Reference

The QtDoublePropertyManager provides and manages double properties. More...

     #include <QtDoublePropertyManager>

Inherits QtAbstractPropertyManager.

- List of all members, including inherited members

### Public Functions

- QtDoublePropertyManager ( QObject * parent = 0 )
- ~QtDoublePropertyManager ()
- int decimals ( const QtProperty * property ) const
- double maximum ( const QtProperty * property ) const
- double minimum ( const QtProperty * property ) const
- double singleStep ( const QtProperty * property ) const
- double value ( const QtProperty * property ) const

- 3 public functions inherited from QtAbstractPropertyManager
- 29 public functions inherited from QObject

### Public Slots

- void setDecimals ( QtProperty * property, int prec )
- void setMaximum ( QtProperty * property, double maxVal )
- void setMinimum ( QtProperty * property, double minVal )
- void setRange ( QtProperty * property, double minimum, double maximum )
- void setSingleStep ( QtProperty * property, double step )
- void setValue ( QtProperty * property, double value )

- 1 public slot inherited from QObject

### Signals

- void decimalsChanged ( QtProperty * property, int prec )
- void rangeChanged ( QtProperty * property, double minimum, double maximum )
- void singleStepChanged ( QtProperty * property, double step )
- void valueChanged ( QtProperty * property, double value )

- 4 signals inherited from QtAbstractPropertyManager
- 1 signal inherited from QObject

### Additional Inherited Members

- 1 property inherited from QObject
- 1 public type inherited from QObject
- 4 static public members inherited from QObject
- 6 protected functions inherited from QtAbstractPropertyManager
- 7 protected functions inherited from QObject
- 2 protected variables inherited from QObject

## Detailed Description

The QtDoublePropertyManager provides and manages double properties.

A double property has a current value, and a range specifying the valid values. The range is defined by a minimum and a maximum value.

The property's value and range can be retrieved using the value(), minimum() and maximum() functions, and can be set using the setValue(), setMinimum() and setMaximum() slots. Alternatively, the range can be defined in one go using the setRange() slot.

In addition, QtDoublePropertyManager provides the valueChanged() signal which is emitted whenever a property created by this manager changes, and the rangeChanged() signal which is emitted whenever such a property changes its range of valid values.

See also QtAbstractPropertyManager and QtDoubleSpinBoxFactory.

## Member Function Documentation

### QtDoublePropertyManager::QtDoublePropertyManager ( QObject * parent = 0 )

Creates a manager with the given parent.

### QtDoublePropertyManager::~QtDoublePropertyManager ()

Destroys this manager, and all the properties it has created.

### int QtDoublePropertyManager::decimals ( const QtProperty * property ) const

Returns the given property's precision, in decimals.

See also setDecimals().

### void QtDoublePropertyManager::decimalsChanged ( QtProperty * property, int prec ) `[signal]`

This signal is emitted whenever a property created by this manager changes its precision of value, passing a pointer to the property and the new prec value

See also setDecimals().

### double QtDoublePropertyManager::maximum ( const QtProperty * property ) const

Returns the given property's maximum value.

See also setMaximum(), minimum(), and setRange().

### double QtDoublePropertyManager::minimum ( const QtProperty * property ) const

Returns the given property's minimum value.

See also setMinimum(), maximum(), and setRange().

### void QtDoublePropertyManager::rangeChanged ( QtProperty * property, double minimum, double maximum ) `[signal]`

This signal is emitted whenever a property created by this manager changes its range of valid values, passing a pointer to the property and the new minimum and maximum values

See also setRange().

### void QtDoublePropertyManager::setDecimals ( QtProperty * property, int prec ) `[slot]`

Sets the precision of the given property to prec.

The valid decimal range is 0-13. The default is 2.

See also decimals().

### void QtDoublePropertyManager::setMaximum ( QtProperty * property, double maxVal ) `[slot]`

Sets the maximum value for the given property to maxVal.

When setting the maximum value, the minimum and current values are adjusted if necessary (ensuring that the range remains valid and that the current value is within in the range).

See also maximum(), setRange(), and rangeChanged().

### void QtDoublePropertyManager::setMinimum ( QtProperty * property, double minVal ) `[slot]`

Sets the minimum value for the given property to minVal.

When setting the minimum value, the maximum and current values are adjusted if necessary (ensuring that the range remains valid and that the current value is within in the range).

See also minimum(), setRange(), and rangeChanged().

### void QtDoublePropertyManager::setRange ( QtProperty * property, double minimum, double maximum ) `[slot]`

Sets the range of valid values.

This is a convenience function defining the range of valid values in one go; setting the minimum and maximum values for the given property with a single function call.

When setting a new range, the current value is adjusted if necessary (ensuring that the value remains within range).

See also setMinimum(), setMaximum(), and rangeChanged().

### void QtDoublePropertyManager::setSingleStep ( QtProperty * property, double step ) `[slot]`

Sets the step value for the given property to step.

The step is typically used to increment or decrement a property value while pressing an arrow key.

See also singleStep().

### void QtDoublePropertyManager::setValue ( QtProperty * property, double value ) `[slot]`

Sets the value of the given property to value.

If the specified value is not valid according to the given property's range, the value is adjusted to the nearest valid value within the range.

See also value(), setRange(), and valueChanged().

### double QtDoublePropertyManager::singleStep ( const QtProperty * property ) const

Returns the given property's step value.

The step is typically used to increment or decrement a property value while pressing an arrow key.

See also setSingleStep().

### void QtDoublePropertyManager::singleStepChanged ( QtProperty * property, double step ) `[signal]`

This signal is emitted whenever a property created by this manager changes its single step property, passing a pointer to the property and the new step value

See also setSingleStep().

### double QtDoublePropertyManager::value ( const QtProperty * property ) const

Returns the given property's value.

If the given property is not managed by this manager, this function returns 0.

See also setValue().

### void QtDoublePropertyManager::valueChanged ( QtProperty * property, double value ) `[signal]`

This signal is emitted whenever a property created by this manager changes its value, passing a pointer to the property and the new value as parameters.

See also setValue().