Post on 07-Aug-2020
Nimbus:Making Swing Look Sexy!
Jasper PottsPeter ZhelezniakovSun Microsystems
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Abstract
Get acquainted with the new Nimbus Look andFeel, and learn some ways to customize it
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Agenda
> Overview> Architecture> Customizations> Tool Support
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Nimbus Overview
> A Synth descendant> Cross platform> Vector based> Painters based> Highly customizable> Now in JDK7!
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Its Default Look
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Agenda
> Overview> Architecture> Customizations
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Vector Based
> All Nimbus components are purely vector based● Scalable: larger or smaller
> No images used● Allows us to participate in solution for hi-DPI● Allows color theming for branding
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Vector Based
> Heuristic based image caching● Cache is invalidated if the sizes change
dramatically● Or colors, fonts, etc change
> 9-Square technique resizes vector shapes● Move control points based on location in grid
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Bitmap Scaling
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Vector Scaling
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9 SquareHow vectors are resized dynamically
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Painters
> Component rendering is delegated to Painters● javax.swing.Painter● Stateless● Extend AbstractRegionPainter
to get scaling and caching
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Painters
public interface Painter { public void paint( Graphics2D g, JComponent c, int width, int height);}
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Now in JDKTM7
> javax.swing.plaf.nimbus> javax.swing.Painter> Some old com.sun.java.swing stuff
preserved for backward compatibility:● Painter● plaf.nimbus.NimbusLookAndFeel
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Agenda
> Overview> Architecture> Customizations
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Scalable Components
> Support for small and large components● For use in palettes or toolbars
> Supply a client property to the component● “JComponent.sizeVariant”● Either “large”, “small”, or “mini”
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Scalable Componentshttps://laffy.dev.java.net
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Color Themes
> Most colors are derived from a set ofbase colors
> Derived colors are updated automatically whentheir parent colors change
> Derived colors refer to parent colors indirectly viaUI property name
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Color Tree
nimbusBase
nimbusBlueGrey nimbusSelection
nimbusBorder
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Creating Derived Colors
> NimbusLookAndFeel.getDerivedColor(String uiDefaultParentName,float hOffset, float sOffset,float bOffset, int aOffset,boolean uiResource)
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Customizing Colors
UIManager.put("nimbusBase", new Color(...));UIManager.put("nimbusBlueGrey", new Color(...));UIManager.put("control", new Color(...));
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DEMO: Custom Color Theme
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Everything is in UIDefaults
> All customizations are exposed via UIDefaults● Button.foreground
> Properties can be state dependent● Button[Disabled].foreground
> States can be combined● Button[Default+Focused].foreground
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Selectors
> Region names● ComboBox
> Component names● “ComboBox.renderer”
● Applies to all components with that name> Hierarchical
● MenuBar:Menu● Applies to all Menus whose parent is a MenuBar
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Cascading Defaults
> Most specific default wins> Example:
● foreground = Color.BLACK● Label.foreground = Color.BLUE● Label[Disabled].foreground = Color.GRAY● “SomeLabel”[Disabled].foreground = Color.WHITE
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Customizations
> States> Fonts and colors> Standard components
● Replace painting code and change defaults● For all components of a single type (ie: JButton)● For a single component instance● For all components with a specific name
> Add support for 3rd Party components
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Per-instance Customization
> Create a UIDefaults Map> Load the map with all overrides of global values> Set map on target component
● Nimbus.Overrides> Ignore UIManager defaults if necessary
● Nimbus.Overrides.InheritDefaults
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Custom Painters
> Button[Enabled].backgroundPainter● Used by buttons when enabled
> Button[MouseOver].borderPainter● Used by buttons when mouse over
> Button.foregroundPainter● Used by default
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DEMO: Missile Control Login
> TODO add some demo slides
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Further Development
> Publish Synth delegates: 6827653> Fix startup performance: 6802944
● Fixed in 6u14> Open Designer source code
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More Information
> http://openjdk.java.net> https://laffy.dev.java.net> http://www.jasperpotts.com/blog