Variable in Java

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Table 20-11 Variable
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input hue
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Variables of the ColorAdjust Class Type
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Effect Number
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Access
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RW RW
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Default
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null 00
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Description
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The input to this effect The amount by which the hue of each pixel should be adjusted, in the range 10 to 10 Value 0 leaves the hue unchanged The amount by which the saturation of each pixel should be adjusted, in the range -10 to 10 Value 0 leaves the saturation unchanged The amount by which the brightness of each pixel should be adjusted, in the range -10 to 10 Value 0 leaves the brightness unchanged The amount by which the contrast should be adjusted, in the range 025 to 4 Value 1 leaves the contrast unchanged
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saturation
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Number
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brightness
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Number
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contrast
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Number
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The JavaFX Effects Classes
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minimum position and 40 at its maximum position On the left of Figure 20-18, you can see the result of applying almost the maximum brightness, and on the right you see the result of applying the maximum contrast
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Figure 20-18
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The ColorAdjust effect
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InvertMask
The InvertMask effect takes another Effect as its input and produces a result in which all the transparent pixels from the input are opaque and all the opaque pixels are transparentThe output is typically used as one of the inputs to a Blend effect, which is discussed later in this chapterThe variables of the InvertMask class are listed in Table 20-12
Table 20-12 Variable
input pad
The Variables of the InvertMask Class Type
Effect Number
Access
RW RW
Default
null 0
Description
The input to this effect The padding to add to the sides of the resulting image
Reflection
The Reflection effect provides an easy way to create a reflection of a node or group of nodesThe variables that you can use to specify the required characteristics of the reflection are listed in Table 20-13
20 Effects and Blending
Table 20-13 Variable
input topOffset fraction topOpacity bottomOpacity
The Variables of the Reflection Class Type
Effect Number Number Number Number
Access
RW RW RW RW RW
Default
null 0 0 05 0
Description
The input to this effect The distance between the bottom of the input and the beginning of the reflection The fraction of the input that is used to create the reflection The opacity used for the topmost row of pixels in the reflection The opacity of the bottom row of pixels in the reflection
The example code in the file javafxeffects/Reflection1fx allows you to experiment with different values of these variablesA typical result, which is equivalent to the following code, is shown in Figure 20-19
Text { content: "JavaFX Developer's Guide" x: 20 y: 50 fill: ColorWHITE font: Font { size: 24 } effect: Reflection { topOffset:0 fraction: 08 topOpacity: 03 bottomOpacity: 00 } }
Figure 20-19
The Reflection effect
The topOffset variable lets you set the distance between the source object, here the text JavaFX Developer s Guide (and its reflection) Increasing this distance makes it
The JavaFX Effects Classes
seem that the source is further away from the reflecting surface In Figure 20-19, the topOffset value is 0, which places the reflection as close as possible to the original In this case, the reflected text might seem to be farther away than it should be with this value that is because of the descender on the letter p, which is the closest point of contact with the reflection The fraction variable determines how much of the source appears in the reflection Typically, unless the reflecting surface is very shiny, you will not want the whole of the source object to be reflected In Figure 20-19, the fraction variable has the value 08, so about 80% of the source is reflected The topOpacity and bottomOpacity values give the opacity of the reflection at its top and bottom extents, respectively In Figure 20-19, the topOpacity has been set to 03 and bottomOpacity to 00
SepiaTone
The SepiaTone effect is used to give images (or any group of nodes) an Olde Worlde look, as if they have been photographed by an old black-and-white camera, or washed out by the effects of exposure to sunlight over a long periodThis effect provides only the two variables listed in Table 20-14
Table 20-14 Variable
input level
Variables of the SepiaTone Class Type
Effect Number
Access
RW RW
Default
null 10
Description
The input to this effect The level of this effect, from 00 to 10
The level variable determines the extent to which the image is affectedThe example code in the file javafxeffects/SepiaTone1fx creates a Scene containing an image and a slider that lets you vary the value of the level variable and observe the resultThe screenshot on the left of Figure 20-20 has level set to the value 04, while the one on the right has level set to 10