javax.swing.plaf.metal

Class MetalTreeUI

public class MetalTreeUI extends BasicTreeUI

A UI delegate for the {@link JTree} component.

Constructor Summary
	MetalTreeUI() Constructs a new instance of `MetalTreeUI`.

Method Summary
static ComponentUI	createUI(JComponent component) Returns a new instance of `MetalTreeUI`.
protected void	decodeLineStyle(Object lineStyleFlag) This function converts between the string passed into the client property and the internal representation (currently an int).
protected int	getHorizontalLegBuffer() The horizontal element of legs between nodes starts at the right of the left-hand side of the child node by default.
void	installUI(JComponent c) Configures the specified component appropriate for the look and feel.
protected boolean	isLocationInExpandControl(int row, int rowLevel, int mouseX, int mouseY) Checks if the location is in expand control.
void	paint(Graphics g, JComponent c) Paints the specified component appropriate for the look and feel.
protected void	paintHorizontalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, Rectangle bounds, TreePath path, int row, boolean isExpanded, boolean hasBeenExpanded, boolean isLeaf) Paints the horizontal part of the leg.
protected void	paintHorizontalSeparators(Graphics g, JComponent c) Paints the horizontal separators.
protected void	paintVerticalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, TreePath path) Paints the vertical part of the leg.
void	uninstallUI(JComponent c) Reverses configuration which was done on the specified component during installUI.

Constructor Detail

MetalTreeUI

public MetalTreeUI()

Constructs a new instance of MetalTreeUI.

Method Detail

createUI

public static ComponentUI createUI(JComponent component)

Returns a new instance of MetalTreeUI.

Parameters: component the component for which we return an UI instance

Returns: A new instance of MetalTreeUI.

decodeLineStyle

protected void decodeLineStyle(Object lineStyleFlag)

This function converts between the string passed into the client property and the internal representation (currently an int).

Parameters: lineStyleFlag - String representation

getHorizontalLegBuffer

protected int getHorizontalLegBuffer()

The horizontal element of legs between nodes starts at the right of the left-hand side of the child node by default. This method makes the leg end before that.

Configures the specified component appropriate 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 any 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.

isLocationInExpandControl

protected boolean isLocationInExpandControl(int row, int rowLevel, int mouseX, int mouseY)

Checks if the location is in expand control.

Parameters: row - current row rowLevel - current level mouseX - current x location of the mouse click mouseY - current y location of the mouse click

paint

public void paint(Graphics g, JComponent c)

Paints the specified component appropriate for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.

Parameters: g - the current graphics configuration. c - the current component to draw

paintHorizontalPartOfLeg

protected void paintHorizontalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, Rectangle bounds, TreePath path, int row, boolean isExpanded, boolean hasBeenExpanded, boolean isLeaf)

Paints the horizontal part of the leg. The receiver should NOT \ modify clipBounds, or insets. NOTE: parentRow can be -1 if the root is not visible.

paintHorizontalSeparators

protected void paintHorizontalSeparators(Graphics g, JComponent c)

Paints the horizontal separators.

Parameters: g - the current graphics configuration. c - the current component to draw

paintVerticalPartOfLeg

protected void paintVerticalPartOfLeg(Graphics g, Rectangle clipBounds, Insets insets, TreePath path)

Paints the vertical part of the leg. The receiver should NOT modify clipBounds, insets.

Parameters: g - the current graphics configuration. clipBounds - insets - path - the current path

uninstallUI

public void uninstallUI(JComponent c)

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.