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Java Standard Edition (SE)

SynthScrollBarUI


javax.swing.plaf.synth

Class SynthScrollBarUI

    • Constructor Detail

      • SynthScrollBarUI

        public SynthScrollBarUI()
    • Method Detail

      • getContext

        public SynthContext getContext(JComponent c)
        Returns the Context for the specified component.
        Specified by:
        getContext in interface SynthUI
        Parameters:
        c - Component requesting SynthContext.
        Returns:
        SynthContext describing component.
      • getSupportsAbsolutePositioning

        public boolean getSupportsAbsolutePositioning()
        Indicates whether the user can absolutely position the thumb with a mouse gesture (usually the middle mouse button).
        Overrides:
        getSupportsAbsolutePositioning in class BasicScrollBarUI
        Returns:
        true if a mouse gesture can absolutely position the thumb
      • update

        public void update(Graphics g,
                           JComponent c)
        Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the paint(SynthContext,Graphics) method.

        In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the paint method.

        Overrides:
        update in class ComponentUI
        Parameters:
        g - the Graphics object used for painting
        c - the component being painted
        See Also:
        paint(SynthContext,Graphics)
      • paint

        protected void paint(SynthContext context,
                             Graphics g)
        Paints the specified component.
        Parameters:
        context - context for the component being painted
        g - the Graphics object used for painting
        See Also:
        update(Graphics,JComponent)
      • paintBorder

        public void paintBorder(SynthContext context,
                                Graphics g,
                                int x,
                                int y,
                                int w,
                                int h)
        Paints the border.
        Specified by:
        paintBorder in interface SynthUI
        Parameters:
        context - a component context
        g - Graphics to paint on
        x - the X coordinate
        y - the Y coordinate
        w - width of the border
        h - height of the border
      • paintTrack

        protected void paintTrack(SynthContext context,
                                  Graphics g,
                                  Rectangle trackBounds)
        Paints the scrollbar track.
        Parameters:
        context - context for the component being painted
        g - Graphics object used for painting
        trackBounds - bounding box for the track
      • paintThumb

        protected void paintThumb(SynthContext context,
                                  Graphics g,
                                  Rectangle thumbBounds)
        Paints the scrollbar thumb.
        Parameters:
        context - context for the component being painted
        g - Graphics object used for painting
        thumbBounds - bounding box for the thumb
      • getMinimumThumbSize

        protected Dimension getMinimumThumbSize()
        Returns the smallest acceptable size for the thumb. If the scrollbar becomes so small that this size isn't available, the thumb will be hidden.

        Warning : the value returned by this method should not be be modified, it's a shared static constant.

        Overrides:
        getMinimumThumbSize in class BasicScrollBarUI
        Returns:
        The smallest acceptable size for the thumb.
        See Also:
        BasicScrollBarUI.getMaximumThumbSize()
      • setThumbRollover

        protected void setThumbRollover(boolean active)
        Sets whether or not the mouse is currently over the thumb.
        Overrides:
        setThumbRollover in class BasicScrollBarUI
        Parameters:
        active - True indicates the thumb is currently active.


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