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Class jclass.bwt.JCScrolledWindow

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----jclass.bwt.JCContainer
                                   |
                                   +----jclass.bwt.JCScrolledWindow

public class JCScrolledWindow

extends JCContainer

implements KeyListener, JCAdjustmentListener

Properties

Name	Method
Background	setBackground
ColumnAlignments	setColumnAlignments
ColumnLeftMargin	setColumnLeftMargin
ColumnRightMargin	setColumnRightMargin
ColumnWidths	setColumnWidths
Font	setFont
Foreground	setForeground
Insets	setInsets
NumColumns	setNumColumns
PreferredSize	setPreferredSize
ScrollbarDisplay	setScrollbarDisplay
ScrollbarOffset	setScrollbarOffset
UserData	setUserData

DISPLAY_ALWAYS

DISPLAY_AS_NEEDED

DISPLAY_HORIZONTAL_ONLY

DISPLAY_NONE

DISPLAY_VERTICAL_ONLY

viewport

The component used as the viewing area into the scrolled component.

JCScrolledWindow()

Creates an empty window.

JCScrolledWindow(Applet, String)

Creates a window which reads parameters from the applet's HTML file.

add(Component)

Adds the specified component to the viewport.

addInternal(Component)

addNotify()

Creates the Panel's peer.

adjustmentValueChanged(JCAdjustmentEvent)

Processes scrollbar events.

getHorizScrollbar()

getParameters()

Reads the parameter values from the HTML page using the component's applet.

getScrollbarDisplay()

Gets the ScrollbarDisplay value.

getScrollbarOffset()

Gets the ScrollbarOffset value.

getVertScrollbar()

getViewport()

Gets the viewport.

getViewportHeight()

Gets the viewport's "virtual height".

getViewportWidth()

Gets the viewport's "virtual width".

headerHeight()

keyPressed(KeyEvent)

keyReleased(KeyEvent)

keyTyped(KeyEvent)

layout()

Positions the scrollbars and viewport.

preferredHeight()

Gets the subclass' preferred height (default: 100).

preferredWidth()

Gets the subclass' preferred width (default: 100).

reshapeHeader(int, int, int)

reshapeViewport(int, int, int, int)

Reshapes the viewport to the specified size.

scrollHorizontal(int)

Scrolls the window horizontally to the specified value.

scrollHorizontal(JCAdjustmentEvent, int)

Scrolls the window horizontally to the specified value.

scrollHorizontal(JCScrollableInterface, JCAdjustmentEvent, int)

Scrolls a scrollableInterface component horizontally.

scrollVertical(int)

Scrolls the window vertically to the specified value.

scrollVertical(JCAdjustmentEvent, int)

Scrolls the window vertically to the specified value.

scrollVertical(JCScrollableInterface, JCAdjustmentEvent, int)

Scrolls a scrollableInterface component vertically.

setHorizScrollbarValues()

This method may be overriden by a subclass to change the default values of the horizontal scrollbar.

setHorizScrollbarValues(int, int, int, int)

This method may be overriden by a subclass to set the horizontal scrollbar's values.

setLayout(LayoutManager)

Sets the layout manager for this container.

setScrollbarDisplay(int)

Sets when to display the scrollbars:

DISPLAY_ALWAYS           always displayed
DISPLAY_AS_NEEDED        displayed as necessary (default)
DISPLAY_VERTICAL_ONLY    always display vertical scrollbar only
DISPLAY_HORIZONTAL_ONLY  always display horizontal scrollbar only
DISPLAY_NONE             don't display scrollbars

HTML param name/value: "ScrollbarDisplay"/enum

setScrollbarOffset(int)

Sets the distance between the scrollbars and the viewport (default: 0).

HTML param name/value: "ScrollbarOffset"/int

setVertScrollbarValues()

This method may be overriden by a subclass to change the default values of the vertical scrollbar.

setVertScrollbarValues(int, int, int, int)

This method may be overriden by a subclass to set the vertical scrollbar's values.

 public static final int DISPLAY_AS_NEEDED

 public static final int DISPLAY_ALWAYS

 public static final int DISPLAY_NONE

 public static final int DISPLAY_VERTICAL_ONLY

 public static final int DISPLAY_HORIZONTAL_ONLY

 protected Component viewport

The component used as the viewing area into the scrolled component.

 public JCScrolledWindow()

Creates an empty window. No parameters are read from an HTML file.

 public JCScrolledWindow(Applet applet,
                         String name)

Creates a window which reads parameters from the applet's HTML file.

Parameters:

applet - the applet whose PARAM tags are to be read

name - if this is not null, only parameters preceded by this name are read

See Also:

getParameter

 protected void getParameters()

Reads the parameter values from the HTML page using the component's applet. The values will override those previously set.

Overrides:

getParameters in class JCContainer

 public int getScrollbarDisplay()

Gets the ScrollbarDisplay value.

See Also:

setScrollbarDisplay

 public void setScrollbarDisplay(int v)

Sets when to display the scrollbars:

DISPLAY_ALWAYS           always displayed
DISPLAY_AS_NEEDED        displayed as necessary (default)
DISPLAY_VERTICAL_ONLY    always display vertical scrollbar only
DISPLAY_HORIZONTAL_ONLY  always display horizontal scrollbar only
DISPLAY_NONE             don't display scrollbars

HTML param name/value: "ScrollbarDisplay"/enum

Throws: IllegalArgumentException

If an invalid value was set

 public int getScrollbarOffset()

Gets the ScrollbarOffset value.

See Also:

setScrollbarOffset

 public void setScrollbarOffset(int v)

Sets the distance between the scrollbars and the viewport (default: 0).

HTML param name/value: "ScrollbarOffset"/int

 public Component getViewport()

Gets the viewport.

 protected int preferredWidth()

Gets the subclass' preferred width (default: 100).

Overrides:

preferredWidth in class JCContainer

 protected int preferredHeight()

Gets the subclass' preferred height (default: 100).

Overrides:

preferredHeight in class JCContainer

 protected int getViewportWidth()

Gets the viewport's "virtual width". The default method returns the viewport's preferred width.

 protected int getViewportHeight()

Gets the viewport's "virtual height". The default method returns the viewport's preferred height.

 public Component add(Component comp)

Adds the specified component to the viewport.

Overrides:

add in class JCContainer

 protected void addInternal(Component comp)

 public void addNotify()

Creates the Panel's peer.

Overrides:

addNotify in class JCContainer

 public JCScrollbar getVertScrollbar()

 public JCScrollbar getHorizScrollbar()

 protected void setHorizScrollbarValues()

This method may be overriden by a subclass to change the default values of the horizontal scrollbar.

 protected void setHorizScrollbarValues(int value,
                                        int visible,
                                        int min,
                                        int max)

This method may be overriden by a subclass to set the horizontal scrollbar's values.

Parameters:

value - the scrollbar's value

visible - the amount visible per page (the slider size). The page increment this is also set to this value.

min - the minimum value of the scrollbar

max - the maximum value of the scrollbar

See Also:

setValues

 protected void setVertScrollbarValues(int value,
                                       int visible,
                                       int min,
                                       int max)

This method may be overriden by a subclass to set the vertical scrollbar's values.

Parameters:

value - the scrollbar's value

visible - the amount visible per page (the slider size). The page increment this is also set to this value.

min - the minimum value of the scrollbar

max - the maximum value of the scrollbar

See Also:

setValues

 protected void setVertScrollbarValues()

This method may be overriden by a subclass to change the default values of the vertical scrollbar.

 protected int reshapeHeader(int x,
                             int y,
                             int w)

 protected int headerHeight()

 protected void reshapeViewport(int x,
                                int y,
                                int w,
                                int h)

Reshapes the viewport to the specified size.

 public synchronized void layout()

Positions the scrollbars and viewport.

Overrides:

layout in class Container

 protected void scrollHorizontal(JCScrollableInterface scrollable,
                                 JCAdjustmentEvent ev,
                                 int value)

Scrolls a scrollableInterface component horizontally.

 protected void scrollVertical(JCScrollableInterface scrollable,
                               JCAdjustmentEvent ev,
                               int value)

Scrolls a scrollableInterface component vertically.

 protected void scrollVertical(JCAdjustmentEvent ev,
                               int value)

Scrolls the window vertically to the specified value. Subclasses may override this method to provide custom behavior.

 protected void scrollHorizontal(JCAdjustmentEvent ev,
                                 int value)

Scrolls the window horizontally to the specified value. Subclasses may override this method to provide custom behavior.

 public void scrollVertical(int v)

Scrolls the window vertically to the specified value.

 public void scrollHorizontal(int v)

Scrolls the window horizontally to the specified value.

 public void keyPressed(KeyEvent ev)

 public void keyReleased(KeyEvent ev)

 public void keyTyped(KeyEvent ev)

 public void adjustmentValueChanged(JCAdjustmentEvent ev)

Processes scrollbar events.

 public final void setLayout(LayoutManager mgr)

Sets the layout manager for this container. This method is overridden to prevent the layout mgr from being set.

Overrides:

setLayout in class Container

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