Style Sheet Basics in Java

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Style Sheet Basics
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needs it, you can declare it in the scene rule and then use it anywhere else in the style sheetThis works because the scene rule is applied to a node that is the ancestor of every other node in the scene Here s an example:
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scene { my-color: red; } text { fx-fill: my-color; }
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Here, we define a constant called my-color, which is assigned the value red, and then refer to it from the text ruleThe result of this is that the fill of any node with style class text will be red Note that this technique works only for colors Setting the Background Color of the Scene Despite its name, you can t use the scene style to apply CSS rules to the Scene object In particular, there is no way to set the background fill of a scene from a style sheetThe only way to do this is to use a Rectangle as the first element of the scene s content sequence and apply a rule to its backgroundThe following code, from the file javafxstyles/Styles7fx, illustrates this technique:
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Stage { title : Styles 7 var scene:Scene; scene: scene = Scene { stylesheets: {__DIR__}Styles7css width: 100 height: 100 content: [ Rectangle { width: bind scenewidth height: bind sceneheight styleClass: background } ] } }
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Applying this style sheet causes the scene to appear to have a light gray background:
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scene { bg-color: lightGray; } background { -fx-fill: bg-color; }
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23 Style Sheets
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Note that we define the background color as part of the scene rule and then use it in the definition of the style class definition used by the rectangleThis isn t necessary, but it has the advantage of keeping the definition of the background in the place where it should logically be defined Using Multiple Style Sheets In all the examples so far, we have used a single style sheet, but it is also possible to spread your style sheet rules over multiple filesYou might do this to group them together by function for example, corporate styling requirements in one style sheet, differences for your specific application in another, and so onTo use more than one style sheet, you just reference them all from the stylesheets variable of the sceneThe order in which they appear is important In general, style sheets containing more-specific rules should appear after those with less-specific rules, so you would place your corporate style sheet before your local style sheet
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So far in this chapter, we have looked at the overall structure of a style sheet and how the rules that it contains are applied to the nodes of a scene graph In this section, we look more closely at how to specify fonts and colors and how to describe an effect to be applied to a node
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A font can be specified either by using separate properties that assign values to the individual elements of the font or by a single property that includes all parts of the font definition Setting Individual Font Properties You can use four properties to define a font in a style sheet rule If you don t specify all four properties, the values that you don t specify are inherited from the parent of the node to which the style sheet rule is appliedThe property names are -fx-font-family, -fx-font-size, -fx-font-style, and -fx-font-weight Font Family The -fx-font-family property specifies the family name of the font you want to use If the name contains spaces, it must be enclosed in quotes Here are a couple of examples:
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-fx-font-family: Arial; -fx-font-family: Arial Bold ;
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Font Size The -fx-font-size property lets you specify how large the font should beThere are a number of ways to specify the size, the most being to use a numeric value followed by a measuring unitTable 23-1 lists the recognized measuring units
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