com.jidesoft.swing
Class JideScrollPaneLayout

java.lang.Object
  javax.swing.ScrollPaneLayout
      com.jidesoft.swing.JideScrollPaneLayout

All Implemented Interfaces:

JideScrollPaneConstants, java.awt.LayoutManager, java.io.Serializable, javax.swing.ScrollPaneConstants

public class JideScrollPaneLayout
extends javax.swing.ScrollPaneLayout
implements JideScrollPaneConstants

The layout manager used by JideScrollPane. JideScrollPaneLayout is responsible for eleven components: a viewport, two scrollbars, a row header, a column header, a row footer, a column footer, and four "corner" components.

See Also:

Serialized Form

Field Summary

protected javax.swing.JViewport	_colFoot The column footer child.
protected java.awt.Component	_hLeft The component to the left of horizontal scroll bar.
protected java.awt.Component	_hRight The component to the right of horizontal scroll bar.
protected javax.swing.JViewport	_rowFoot The row footer child.
protected java.awt.Component	_vBottom The component to the bottom of vertical scroll bar.
protected java.awt.Component	_vTop The component to the top of vertical scroll bar.

Fields inherited from class javax.swing.ScrollPaneLayout

colHead, hsb, hsbPolicy, lowerLeft, lowerRight, rowHead, upperLeft, upperRight, viewport, vsb, vsbPolicy

Fields inherited from interface com.jidesoft.swing.JideScrollPaneConstants

COLUMN_FOOTER, HORIZONTAL_LEADING, HORIZONTAL_LEFT, HORIZONTAL_RIGHT, HORIZONTAL_TRAILING, ROW_FOOTER, VERTICAL_BOTTOM, VERTICAL_TOP

Fields inherited from interface javax.swing.ScrollPaneConstants

COLUMN_HEADER, HORIZONTAL_SCROLLBAR, HORIZONTAL_SCROLLBAR_ALWAYS, HORIZONTAL_SCROLLBAR_AS_NEEDED, HORIZONTAL_SCROLLBAR_NEVER, HORIZONTAL_SCROLLBAR_POLICY, LOWER_LEADING_CORNER, LOWER_LEFT_CORNER, LOWER_RIGHT_CORNER, LOWER_TRAILING_CORNER, ROW_HEADER, UPPER_LEADING_CORNER, UPPER_LEFT_CORNER, UPPER_RIGHT_CORNER, UPPER_TRAILING_CORNER, VERTICAL_SCROLLBAR, VERTICAL_SCROLLBAR_ALWAYS, VERTICAL_SCROLLBAR_AS_NEEDED, VERTICAL_SCROLLBAR_NEVER, VERTICAL_SCROLLBAR_POLICY, VIEWPORT

Constructor Summary

JideScrollPaneLayout()

Method Summary

void	addLayoutComponent(java.lang.String s, java.awt.Component c)
javax.swing.JViewport	getColumnFooter() Returns the JViewport object that is the column footer.
javax.swing.JViewport	getRowFooter() Returns the JViewport object that is the row footer.
java.awt.Component	getScrollBarCorner(java.lang.String key) Returns the Component at the specified corner.
protected boolean	isColumnFootersHeightUnified(javax.swing.JScrollPane sp)
protected boolean	isColumnHeadersHeightUnified(javax.swing.JScrollPane sp)
protected boolean	isHsbCoversWholeWidth(javax.swing.JScrollPane sp)
protected boolean	isVsbCoversWholeHeight(javax.swing.JScrollPane sp)
void	layoutContainer(java.awt.Container parent) Lays out the scrollpane.
java.awt.Dimension	minimumLayoutSize(java.awt.Container parent) The minimum size of a ScrollPane is the size of the insets plus minimum size of the viewport, plus the scrollpane's viewportBorder insets, plus the minimum size of the visible headers, plus the minimum size of the scrollbars whose displayPolicy isn't NEVER.
java.awt.Dimension	preferredLayoutSize(java.awt.Container parent) The preferred size of a ScrollPane is the size of the insets, plus the preferred size of the viewport, plus the preferred size of the visible headers, plus the preferred size of the scrollbars that will appear given the current view and the current scrollbar displayPolicies.
void	removeLayoutComponent(java.awt.Component c)
void	syncWithScrollPane(javax.swing.JScrollPane sp)

Methods inherited from class javax.swing.ScrollPaneLayout

addSingletonComponent, getColumnHeader, getCorner, getHorizontalScrollBar, getHorizontalScrollBarPolicy, getRowHeader, getVerticalScrollBar, getVerticalScrollBarPolicy, getViewport, getViewportBorderBounds, setHorizontalScrollBarPolicy, setVerticalScrollBarPolicy

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_rowFoot

protected javax.swing.JViewport _rowFoot

The row footer child. Default is null.

See Also:

JideScrollPane.setRowFooter(javax.swing.JViewport)

_colFoot

protected javax.swing.JViewport _colFoot

The column footer child. Default is null.

See Also:

JideScrollPane.setColumnFooter(javax.swing.JViewport)

_hLeft

protected java.awt.Component _hLeft

The component to the left of horizontal scroll bar.

_hRight

protected java.awt.Component _hRight

The component to the right of horizontal scroll bar.

_vTop

protected java.awt.Component _vTop

The component to the top of vertical scroll bar.

_vBottom

protected java.awt.Component _vBottom

The component to the bottom of vertical scroll bar.

Constructor Detail

JideScrollPaneLayout

public JideScrollPaneLayout()

Method Detail

syncWithScrollPane

public void syncWithScrollPane(javax.swing.JScrollPane sp)

Overrides:

syncWithScrollPane in class javax.swing.ScrollPaneLayout

isHsbCoversWholeWidth

protected boolean isHsbCoversWholeWidth(javax.swing.JScrollPane sp)

isVsbCoversWholeHeight

protected boolean isVsbCoversWholeHeight(javax.swing.JScrollPane sp)

isColumnHeadersHeightUnified

protected boolean isColumnHeadersHeightUnified(javax.swing.JScrollPane sp)

isColumnFootersHeightUnified

protected boolean isColumnFootersHeightUnified(javax.swing.JScrollPane sp)

addLayoutComponent

public void addLayoutComponent(java.lang.String s,
                               java.awt.Component c)

Specified by:

addLayoutComponent in interface java.awt.LayoutManager

Overrides:

addLayoutComponent in class javax.swing.ScrollPaneLayout

removeLayoutComponent

public void removeLayoutComponent(java.awt.Component c)

Specified by:

removeLayoutComponent in interface java.awt.LayoutManager

Overrides:

removeLayoutComponent in class javax.swing.ScrollPaneLayout

getRowFooter

public javax.swing.JViewport getRowFooter()

Returns the JViewport object that is the row footer.

Returns:

the JViewport object that is the row footer

See Also:

JideScrollPane.getRowFooter()

getColumnFooter

public javax.swing.JViewport getColumnFooter()

Returns the JViewport object that is the column footer.

Returns:

the JViewport object that is the column footer

See Also:

JideScrollPane.getColumnFooter()

getScrollBarCorner

public java.awt.Component getScrollBarCorner(java.lang.String key)

Returns the Component at the specified corner.

Parameters:

key - the String specifying the corner

Returns:

the Component at the specified corner, as defined in ScrollPaneConstants; if key is not one of the four corners, null is returned

See Also:

JScrollPane.getCorner(java.lang.String)

preferredLayoutSize

public java.awt.Dimension preferredLayoutSize(java.awt.Container parent)

The preferred size of a ScrollPane is the size of the insets, plus the preferred size of the viewport, plus the preferred size of the visible headers, plus the preferred size of the scrollbars that will appear given the current view and the current scrollbar displayPolicies.

Note that the rowHeader is calculated as part of the preferred width and the colHeader is calculated as part of the preferred size.

Specified by:

preferredLayoutSize in interface java.awt.LayoutManager

Overrides:

preferredLayoutSize in class javax.swing.ScrollPaneLayout

Parameters:

parent - the Container that will be laid out

Returns:

a Dimension object specifying the preferred size of the viewport and any scrollbars

See Also:

ViewportLayout, LayoutManager

minimumLayoutSize

public java.awt.Dimension minimumLayoutSize(java.awt.Container parent)

The minimum size of a ScrollPane is the size of the insets plus minimum size of the viewport, plus the scrollpane's viewportBorder insets, plus the minimum size of the visible headers, plus the minimum size of the scrollbars whose displayPolicy isn't NEVER.

Specified by:

minimumLayoutSize in interface java.awt.LayoutManager

Overrides:

minimumLayoutSize in class javax.swing.ScrollPaneLayout

Parameters:

parent - the Container that will be laid out

Returns:

a Dimension object specifying the minimum size

layoutContainer

public void layoutContainer(java.awt.Container parent)

Lays out the scrollpane. The positioning of components depends on the following constraints:

• The row header, if present and visible, gets its preferred width and the viewport's height.

• The column header, if present and visible, gets its preferred height and the viewport's width.

• If a vertical scrollbar is needed, i.e. if the viewport's extent height is smaller than its view height or if the displayPolicy is ALWAYS, it's treated like the row header with respect to its dimensions and is made visible.

• If a horizontal scrollbar is needed, it is treated like the column header (see the paragraph above regarding the vertical scrollbar).

• If the scrollpane has a non-null viewportBorder, then space is allocated for that.

• The viewport gets the space available after accounting for the previous constraints.

• The corner components, if provided, are aligned with the ends of the scrollbars and headers. If there is a vertical scrollbar, the right corners appear; if there is a horizontal scrollbar, the lower corners appear; a row header gets left corners, and a column header gets upper corners.

Specified by:

layoutContainer in interface java.awt.LayoutManager

Overrides:

layoutContainer in class javax.swing.ScrollPaneLayout

Parameters:

parent - the Container to lay out