FlowDocumentReader.SelectionOpacity 属性

定义

命名空间:

System.Windows.Controls

程序集:

PresentationFramework.dll

获取或设置 SelectionBrush 的不透明度。

public:
 property double SelectionOpacity { double get(); void set(double value); };

public double SelectionOpacity { get; set; }

member this.SelectionOpacity : double with get, set

Public Property SelectionOpacity As Double

属性值

Double

SelectionBrush 的不透明度。 默认值为 0.4。

示例

以下示例创建 ， FlowDocumentReader将 SelectionBrush 属性设置为粉色，并将 属性 SelectionOpacity 设置为 0.7。

<FlowDocumentReader SelectionBrush="Pink" SelectionOpacity="0.7">
    <FlowDocument>
        <Paragraph>
            <Bold>Neptune</Bold> (planet), major planet in the solar system, eighth planet
from the Sun and fourth largest in diameter.  Neptune maintains an almost constant
distance, about 4,490 million km (about 2,790 million mi), from the Sun.  Neptune
revolves outside the orbit of Uranus and for most of its orbit moves inside the
elliptical path of the outermost planet Pluto (see Solar System). Every 248 years,
Pluto’s elliptical orbit brings the planet inside Neptune’s nearly circular orbit
for about 20 years, temporarily making Neptune the farthest planet from the Sun.
The last time Pluto’s orbit brought it inside Neptune’s orbit was in 1979. In
1999 Pluto’s orbit carried it back outside Neptune’s orbit.
        </Paragraph>
    </FlowDocument>
</FlowDocumentReader>

注解

如果将 设置为 SelectionOpacity 0，则 SelectionBrush 为透明且不可见。 如果将 设置为 SelectionOpacity 1.0 或更高版本， SelectionBrush 则 为不透明且所选文本不可见。