Module java.desktop

Class AbstractBorder

    • Constructor Detail

      • AbstractBorder

        public AbstractBorder​()
    • Method Detail

      • paintBorder

        public void paintBorder​(Component c,
                                Graphics g,
                                int x,
                                int y,
                                int width,
                                int height)
        This default implementation does no painting.
        Specified by:
        paintBorder in interface Border
        Parameters:
        c - the component for which this border is being painted
        g - the paint graphics
        x - the x position of the painted border
        y - the y position of the painted border
        width - the width of the painted border
        height - the height of the painted border
      • getBorderInsets

        public Insets getBorderInsets​(Component c)
        This default implementation returns a new Insets object that is initialized by the getBorderInsets(Component,Insets) method. By default the top, left, bottom, and right fields are set to 0.
        Specified by:
        getBorderInsets in interface Border
        Parameters:
        c - the component for which this border insets value applies
        Returns:
        a new Insets object
      • getBorderInsets

        public Insets getBorderInsets​(Component c,
                                      Insets insets)
        Reinitializes the insets parameter with this Border's current Insets.
        Parameters:
        c - the component for which this border insets value applies
        insets - the object to be reinitialized
        Returns:
        the insets object
      • isBorderOpaque

        public boolean isBorderOpaque​()
        This default implementation returns false.
        Specified by:
        isBorderOpaque in interface Border
        Returns:
        false
      • getInteriorRectangle

        public Rectangle getInteriorRectangle​(Component c,
                                              int x,
                                              int y,
                                              int width,
                                              int height)
        This convenience method calls the static method.
        Parameters:
        c - the component for which this border is being computed
        x - the x position of the border
        y - the y position of the border
        width - the width of the border
        height - the height of the border
        Returns:
        a Rectangle containing the interior coordinates
      • getInteriorRectangle

        public static Rectangle getInteriorRectangle​(Component c,
                                                     Border b,
                                                     int x,
                                                     int y,
                                                     int width,
                                                     int height)
        Returns a rectangle using the arguments minus the insets of the border. This is useful for determining the area that components should draw in that will not intersect the border.
        Parameters:
        c - the component for which this border is being computed
        b - the Border object
        x - the x position of the border
        y - the y position of the border
        width - the width of the border
        height - the height of the border
        Returns:
        a Rectangle containing the interior coordinates
      • getBaseline

        public int getBaseline​(Component c,
                               int width,
                               int height)
        Returns the baseline. A return value less than 0 indicates the border does not have a reasonable baseline.

        The default implementation returns -1. Subclasses that support baseline should override appropriately. If a value >= 0 is returned, then the component has a valid baseline for any size >= the minimum size and getBaselineResizeBehavior can be used to determine how the baseline changes with size.

        Parameters:
        c - Component baseline is being requested for
        width - the width to get the baseline for
        height - the height to get the baseline for
        Returns:
        the baseline or < 0 indicating there is no reasonable baseline
        Throws:
        IllegalArgumentException - if width or height is < 0
        Since:
        1.6
        See Also:
        Component.getBaseline(int,int), Component.getBaselineResizeBehavior()
      • getBaselineResizeBehavior

        public Component.BaselineResizeBehavior getBaselineResizeBehavior​(Component c)
        Returns an enum indicating how the baseline of a component changes as the size changes. This method is primarily meant for layout managers and GUI builders.

        The default implementation returns BaselineResizeBehavior.OTHER, subclasses that support baseline should override appropriately. Subclasses should never return null; if the baseline can not be calculated return BaselineResizeBehavior.OTHER. Callers should first ask for the baseline using getBaseline and if a value >= 0 is returned use this method. It is acceptable for this method to return a value other than BaselineResizeBehavior.OTHER even if getBaseline returns a value less than 0.

        Parameters:
        c - Component to return baseline resize behavior for
        Returns:
        an enum indicating how the baseline changes as the border is resized
        Since:
        1.6
        See Also:
        Component.getBaseline(int,int), Component.getBaselineResizeBehavior()