Class BasicProgressBarUI

Field Detail

• progressBar

  protected JProgressBar progressBar

• changeListener

  protected ChangeListener changeListener

• boxRect

  protected Rectangle boxRect

  Used to hold the location and size of the bouncing box (returned by getBox) to be painted.

  Since:

  1.5

Constructor Detail

• BasicProgressBarUI

  public BasicProgressBarUI()

Method Detail

• createUI

  public static ComponentUI createUI(JComponent x)

• installUI

  public void installUI(JComponent c)

  Description copied from class: ComponentUI
  Configures the specified component appropriately for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:

  1. Install default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
  2. Install a LayoutManager on the component if necessary.
  3. Create/add any required sub-components to the component.
  4. Create/install event listeners on the component.
  5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
  6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
  7. Initialize any appropriate instance data.

  Overrides:

  installUI in class ComponentUI

  Parameters:

  c - the component where this UI delegate is being installed

  See Also:

  ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()

• uninstallUI

  public void uninstallUI(JComponent c)

  Description copied from class: ComponentUI
  Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:

  1. Remove any UI-set borders from the component.
  2. Remove any UI-set layout managers on the component.
  3. Remove any UI-added sub-components from the component.
  4. Remove any UI-added event/property listeners from the component.
  5. Remove any UI-installed keyboard UI from the component.
  6. Nullify any allocated instance data objects to allow for GC.

  Overrides:

  uninstallUI in class ComponentUI

  Parameters:

  c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

  See Also:

  ComponentUI.installUI(javax.swing.JComponent), JComponent.updateUI()

• installDefaults

  protected void installDefaults()

• uninstallDefaults

  protected void uninstallDefaults()

• installListeners

  protected void installListeners()

• startAnimationTimer

  protected void startAnimationTimer()

  Starts the animation thread, creating and initializing it if necessary. This method is invoked when an indeterminate progress bar should start animating. Reasons for this may include:

  • The progress bar is determinate and becomes displayable
  • The progress bar is displayable and becomes determinate
  • The progress bar is displayable and determinate and this UI is installed

  If you implement your own animation thread, you must override this method.

  Since:

  1.4

  See Also:

  stopAnimationTimer()

• stopAnimationTimer

  protected void stopAnimationTimer()

  Stops the animation thread. This method is invoked when the indeterminate animation should be stopped. Reasons for this may include:

  • The progress bar changes to determinate
  • The progress bar is no longer part of a displayable hierarchy
  • This UI in uninstalled

  If you implement your own animation thread, you must override this method.

  Since:

  1.4

  See Also:

  startAnimationTimer()

• uninstallListeners

  protected void uninstallListeners()

  Removes all listeners installed by this object.

• getBaseline

  public int getBaseline(JComponent c,
                int width,
                int height)

  Returns the baseline.

  Overrides:

  getBaseline in class ComponentUI

  Parameters:

  c - JComponent baseline is being requested for

  width - the width to get the baseline for

  height - the height to get the baseline for

  Returns:

  baseline or a value < 0 indicating there is no reasonable baseline

  Throws:

  NullPointerException - if c is null

  IllegalArgumentException - if width or height is < 0

  Since:

  1.6

  See Also:

  JComponent.getBaseline(int, int)

• getBaselineResizeBehavior

  public Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c)

  Returns an enum indicating how the baseline of the component changes as the size changes.

  Overrides:

  getBaselineResizeBehavior in class ComponentUI

  Parameters:

  c - JComponent to return baseline resize behavior for

  Returns:

  an enum indicating how the baseline changes as the component size changes

  Throws:

  NullPointerException - if c is null

  Since:

  1.6

  See Also:

  JComponent.getBaseline(int, int)

• getPreferredInnerHorizontal

  protected Dimension getPreferredInnerHorizontal()

• getPreferredInnerVertical

  protected Dimension getPreferredInnerVertical()

• getSelectionForeground

  protected Color getSelectionForeground()

  The "selectionForeground" is the color of the text when it is painted over a filled area of the progress bar.

• getSelectionBackground

  protected Color getSelectionBackground()

  The "selectionBackground" is the color of the text when it is painted over an unfilled area of the progress bar.

• getCellLength

  protected int getCellLength()

  Returns the width (if HORIZONTAL) or height (if VERTICAL) of each of the indivdual cells/units to be rendered in the progress bar. However, for text rendering simplification and aesthetic considerations, this function will return 1 when the progress string is being rendered.

  Returns:

  the value representing the spacing between cells

  See Also:

  setCellLength(int), JProgressBar.isStringPainted()

• setCellLength

  protected void setCellLength(int cellLen)

• getCellSpacing

  protected int getCellSpacing()

  Returns the spacing between each of the cells/units in the progress bar. However, for text rendering simplification and aesthetic considerations, this function will return 0 when the progress string is being rendered.

  Returns:

  the value representing the spacing between cells

  See Also:

  setCellSpacing(int), JProgressBar.isStringPainted()

• setCellSpacing

  protected void setCellSpacing(int cellSpace)

• getAmountFull

  protected int getAmountFull(Insets b,
                  int width,
                  int height)

  This determines the amount of the progress bar that should be filled based on the percent done gathered from the model. This is a common operation so it was abstracted out. It assumes that your progress bar is linear. That is, if you are making a circular progress indicator, you will want to override this method.

• paint

  public void paint(Graphics g,
           JComponent c)

  Delegates painting to one of two methods: paintDeterminate or paintIndeterminate.

  Overrides:

  paint in class ComponentUI

  Parameters:

  g - the Graphics context in which to paint

  c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

  See Also:

  ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)

• getBox

  protected Rectangle getBox(Rectangle r)

  Stores the position and size of the bouncing box that would be painted for the current animation index in r and returns r. Subclasses that add to the painting performed in this class's implementation of paintIndeterminate -- to draw an outline around the bouncing box, for example -- can use this method to get the location of the bouncing box that was just painted. By overriding this method, you have complete control over the size and position of the bouncing box, without having to reimplement paintIndeterminate.

  Parameters:

  r - the Rectangle instance to be modified; may be null

  Returns:

  null if no box should be drawn; otherwise, returns the passed-in rectangle (if non-null) or a new rectangle

  Since:

  1.4

  See Also:

  setAnimationIndex(int)

• getBoxLength

  protected int getBoxLength(int availableLength,
                 int otherDimension)

  Returns the length of the "bouncing box" to be painted. This method is invoked by the default implementation of paintIndeterminate to get the width (if the progress bar is horizontal) or height (if vertical) of the box. For example:

  boxRect.width = getBoxLength(componentInnards.width,
                               componentInnards.height);
   

  Parameters:

  availableLength - the amount of space available for the bouncing box to move in; for a horizontal progress bar, for example, this should be the inside width of the progress bar (the component width minus borders)

  otherDimension - for a horizontal progress bar, this should be the inside height of the progress bar; this value might be used to constrain or determine the return value

  Returns:

  the size of the box dimension being determined; must be no larger than availableLength

  Since:

  1.5

  See Also:

  SwingUtilities.calculateInnerArea(javax.swing.JComponent, java.awt.Rectangle)

• paintIndeterminate

  protected void paintIndeterminate(Graphics g,
                        JComponent c)

  All purpose paint method that should do the right thing for all linear bouncing-box progress bars. Override this if you are making another kind of progress bar.

  Since:

  1.4

  See Also:

  paintDeterminate(java.awt.Graphics, javax.swing.JComponent)

• paintDeterminate

  protected void paintDeterminate(Graphics g,
                      JComponent c)

  All purpose paint method that should do the right thing for almost all linear, determinate progress bars. By setting a few values in the defaults table, things should work just fine to paint your progress bar. Naturally, override this if you are making a circular or semi-circular progress bar.

  Since:

  1.4

  See Also:

  paintIndeterminate(java.awt.Graphics, javax.swing.JComponent)

• paintString

  protected void paintString(Graphics g,
                 int x,
                 int y,
                 int width,
                 int height,
                 int amountFull,
                 Insets b)

• getStringPlacement

  protected Point getStringPlacement(Graphics g,
                         String progressString,
                         int x,
                         int y,
                         int width,
                         int height)

  Designate the place where the progress string will be painted. This implementation places it at the center of the progress bar (in both x and y). Override this if you want to right, left, top, or bottom align the progress string or if you need to nudge it around for any reason.

• getPreferredSize

  public Dimension getPreferredSize(JComponent c)

  Description copied from class: ComponentUI
  Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method returns null.

  Overrides:

  getPreferredSize in class ComponentUI

  Parameters:

  c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

  See Also:

  JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)

• getMinimumSize

  public Dimension getMinimumSize(JComponent c)

  The Minimum size for this component is 10. The rationale here is that there should be at least one pixel per 10 percent.

  Overrides:

  getMinimumSize in class ComponentUI

  Parameters:

  c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

  Returns:

  a Dimension object or null

  See Also:

  JComponent.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent)

• getMaximumSize

  public Dimension getMaximumSize(JComponent c)

  Description copied from class: ComponentUI
  Returns the specified component's maximum size appropriate for the look and feel. If null is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.

  Overrides:

  getMaximumSize in class ComponentUI

  Parameters:

  c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components

  Returns:

  a Dimension object or null

  See Also:

  JComponent.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container)

• getAnimationIndex

  protected int getAnimationIndex()

  Gets the index of the current animation frame.

  Since:

  1.4

• getFrameCount

  protected final int getFrameCount()

  Returns the number of frames for the complete animation loop used by an indeterminate JProgessBar. The progress chunk will go from one end to the other and back during the entire loop. This visual behavior may be changed by subclasses in other Look and Feels.

  Returns:

  the number of frames

  Since:

  1.6

• setAnimationIndex

  protected void setAnimationIndex(int newValue)

  Sets the index of the current animation frame to the specified value and requests that the progress bar be repainted. Subclasses that don't use the default painting code might need to override this method to change the way that the repaint method is invoked.

  Parameters:

  newValue - the new animation index; no checking is performed on its value

  Since:

  1.4

  See Also:

  incrementAnimationIndex()

• incrementAnimationIndex

  protected void incrementAnimationIndex()

  Sets the index of the current animation frame, to the next valid value, which results in the progress bar being repainted. The next valid value is, by default, the current animation index plus one. If the new value would be too large, this method sets the index to 0. Subclasses might need to override this method to ensure that the index does not go over the number of frames needed for the particular progress bar instance. This method is invoked by the default animation thread every X milliseconds, where X is specified by the "ProgressBar.repaintInterval" UI default.

  Since:

  1.4

  See Also:

  setAnimationIndex(int)