Module java.desktop

Class ParagraphView

All Implemented Interfaces:
SwingConstants, TabExpander

public class ParagraphView
extends ParagraphView
Displays the a paragraph, and uses css attributes for its configuration.
  • Constructor Details

    • ParagraphView

      public ParagraphView(Element elem)
      Constructs a ParagraphView for the given element.
      Parameters:
      elem - the element that this view is responsible for
  • Method Details

    • setParent

      public void setParent(View parent)
      Establishes the parent view for this view. This is guaranteed to be called before any other methods if the parent view is functioning properly.

      This is implemented to forward to the superclass as well as call the setPropertiesFromAttributes method to set the paragraph properties from the css attributes. The call is made at this time to ensure the ability to resolve upward through the parents view attributes.

      Overrides:
      setParent in class CompositeView
      Parameters:
      parent - the new parent, or null if the view is being removed from a parent it was previously added to
    • getAttributes

      public AttributeSet getAttributes()
      Fetches the attributes to use when rendering. This is implemented to multiplex the attributes specified in the model with a StyleSheet.
      Overrides:
      getAttributes in class View
      Returns:
      the attributes to use when rendering
    • setPropertiesFromAttributes

      protected void setPropertiesFromAttributes()
      Sets up the paragraph from css attributes instead of the values found in StyleConstants (i.e. which are used by the superclass). Since
      Overrides:
      setPropertiesFromAttributes in class ParagraphView
    • getStyleSheet

      protected StyleSheet getStyleSheet()
      Convenient method to get the StyleSheet.
      Returns:
      the StyleSheet
    • calculateMinorAxisRequirements

      protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r)
      Calculate the needs for the paragraph along the minor axis.

      If size requirements are explicitly specified for the paragraph, use that requirements. Otherwise, use the requirements of the superclass ParagraphView.

      If the axis parameter is neither View.X_AXIS nor View.Y_AXIS, IllegalArgumentException is thrown. If the r parameter is null, a new SizeRequirements object is created, otherwise the supplied SizeRequirements object is returned.

      Overrides:
      calculateMinorAxisRequirements in class ParagraphView
      Parameters:
      axis - the minor axis
      r - the input SizeRequirements object
      Returns:
      the new or adjusted SizeRequirements object
      Throws:
      IllegalArgumentException - if the axis parameter is invalid
      See Also:
      SizeRequirements
    • isVisible

      public boolean isVisible()
      Indicates whether or not this view should be displayed. If none of the children wish to be displayed and the only visible child is the break that ends the paragraph, the paragraph will not be considered visible. Otherwise, it will be considered visible and return true.
      Overrides:
      isVisible in class View
      Returns:
      true if the paragraph should be displayed
    • paint

      public void paint(Graphics g, Shape a)
      Renders using the given rendering surface and area on that surface. This is implemented to delegate to the superclass after stashing the base coordinate for tab calculations.
      Overrides:
      paint in class ParagraphView
      Parameters:
      g - the rendering surface to use
      a - the allocated region to render into
      See Also:
      View.paint(java.awt.Graphics, java.awt.Shape)
    • getPreferredSpan

      public float getPreferredSpan(int axis)
      Determines the preferred span for this view. Returns 0 if the view is not visible, otherwise it calls the superclass method to get the preferred span. axis.
      Overrides:
      getPreferredSpan in class BoxView
      Parameters:
      axis - may be either View.X_AXIS or View.Y_AXIS
      Returns:
      the span the view would like to be rendered into; typically the view is told to render into the span that is returned, although there is no guarantee; the parent may choose to resize or break the view
      See Also:
      BoxView.getPreferredSpan(int)
    • getMinimumSpan

      public float getMinimumSpan(int axis)
      Determines the minimum span for this view along an axis. Returns 0 if the view is not visible, otherwise it calls the superclass method to get the minimum span.
      Overrides:
      getMinimumSpan in class BoxView
      Parameters:
      axis - may be either View.X_AXIS or View.Y_AXIS
      Returns:
      the minimum span the view can be rendered into
      See Also:
      BoxView.getMinimumSpan(int)
    • getMaximumSpan

      public float getMaximumSpan(int axis)
      Determines the maximum span for this view along an axis. Returns 0 if the view is not visible, otherwise it calls the superclass method ot get the maximum span.
      Overrides:
      getMaximumSpan in class BoxView
      Parameters:
      axis - may be either View.X_AXIS or View.Y_AXIS
      Returns:
      the maximum span the view can be rendered into
      See Also:
      BoxView.getMaximumSpan(int)