class QGraphicsBlurEffect

The QGraphicsBlurEffect class provides a blur effect. More…

Added in version 4.6.

Synopsis

Properties

• blurHintsᅟ - The blur hint of the effect

• blurRadiusᅟ - The blur radius of the effect

Methods

• def __init__()

• def blurHints()

• def blurRadius()

Slots

• def setBlurHints()

• def setBlurRadius()

Signals

• def blurHintsChanged()

• def blurRadiusChanged()

Note

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Detailed Description

A blur effect blurs the source. This effect is useful for reducing details, such as when the source loses focus and you want to draw attention to other elements. The level of detail can be modified using the setBlurRadius() function. Use setBlurHints() to choose the blur hints.

By default, the blur radius is 5 pixels. The blur radius is specified in device coordinates.

See also

QGraphicsDropShadowEffect QGraphicsColorizeEffect QGraphicsOpacityEffect

class BlurHint

(inherits enum.Flag) This enum describes the possible hints that can be used to control how blur effects are applied. The hints might not have an effect in all the paint engines.

Constant	Description
QGraphicsBlurEffect.PerformanceHint	Indicates that rendering performance is the most important factor, at the potential cost of lower quality.
QGraphicsBlurEffect.QualityHint	Indicates that rendering quality is the most important factor, at the potential cost of lower performance.
QGraphicsBlurEffect.AnimationHint	Indicates that the blur radius is going to be animated, hinting that the implementation can keep a cache of blurred versions of the source. Do not use this hint if the source is going to be dynamically changing.

See also

blurHints() setBlurHints()

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property blurHintsᅟ: Combination of QGraphicsBlurEffect.BlurHint

This property holds the blur hint of the effect..

Use the PerformanceHint hint to say that you want a faster blur, the QualityHint hint to say that you prefer a higher quality blur, or the AnimationHint when you want to animate the blur radius.

By default, the blur hint is PerformanceHint .

Access functions:

• blurHints()

• setBlurHints()

• Signal blurHintsChanged()

property blurRadiusᅟ: float

This property holds the blur radius of the effect..

Using a smaller radius results in a sharper appearance, whereas a bigger radius results in a more blurred appearance.

By default, the blur radius is 5 pixels.

The radius is given in device coordinates, meaning it is unaffected by scale.

Access functions:

• blurRadius()

• setBlurRadius()

• Signal blurRadiusChanged()

__init__([parent=None])

Parameters:

parent – QObject

Constructs a new QGraphicsBlurEffect instance. The parent parameter is passed to QGraphicsEffect ‘s constructor.

blurHints()

Return type:

Combination of BlurHint

See also

setBlurHints()

Getter of property blurHintsᅟ .

blurHintsChanged(hints)

Parameters:

hints – Combination of BlurHint

This signal is emitted whenever the effect’s blur hints changes. The hints parameter holds the effect’s new blur hints.

Notification signal of property blurHintsᅟ .

blurRadius()

Return type:

float

See also

setBlurRadius()

Getter of property blurRadiusᅟ .

blurRadiusChanged(blurRadius)

Parameters:

blurRadius – float

This signal is emitted whenever the effect’s blur radius changes. The radius parameter holds the effect’s new blur radius.

Notification signal of property blurRadiusᅟ .

setBlurHints(hints)

Parameters:

hints – Combination of BlurHint

See also

blurHints()

Setter of property blurHintsᅟ .

setBlurRadius(blurRadius)

Parameters:

blurRadius – float

See also

blurRadius()

Setter of property blurRadiusᅟ .