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Class jclass.bwt.JCHeader

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

public class JCHeader

extends JCContainer

implements JCMultiColumnInterface

Properties

Name	Method
Background	setBackground
ColumnAlignments	setColumnAlignments
ColumnLeftMargin	setColumnLeftMargin
ColumnRightMargin	setColumnRightMargin
ColumnWidths	setColumnWidths
Font	setFont
Foreground	setForeground
Insets	setInsets
Labels	setLabels
Buttons	setButtons
NumColumns	setNumColumns
PreferredSize	setPreferredSize
UserData	setUserData

Events

Class	Listener	Description
JCActionEvent	addActionListener	Posted when a button's is clicked

actionListeners

List of JCActionEvent listeners

comp

The component being controlled.

data

The data for this component.

resize_col

The mouse position, or the column currently being resized.

resizing

True if a column is being resized.

JCHeader()

Creates an empty header.

JCHeader(JCVector)

Creates a header with the specified labels.

JCHeader(String[])

Creates a header with the specified labels.

JCHeader(String[], Applet, String)

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

addActionListener(JCActionListener)

Adds the specified listener to receive action events from the buttons.

addButton(Object)

Creates a button with the specified value, and adds it to the header.

addLabel(Object)

Creates a label with the specified value, and adds it to the header.

addNotify()

Calculates column widths.

calcWidth(int)

Calculates the width of a column.

drawLine(boolean, int)

Draw temporary dashed line while resizing.

getColumnAlignment(int)

Gets a column's alignment (default: BWTEnum.MIDDLELEFT).

getColumnAlignments()

Gets the column alignments.

getColumnLeftMargin(int)

Gets the column's left margin value (pixels).

getColumnPosition(int)

Gets the physical position of the left boundary of the column.

getColumnRightMargin(int)

Gets the column's right margin value (pixels).

getColumnWidth(int)

Gets the current width of a column, or 0 if the column does not exist.

getColumnWidths()

Gets a list of the column widths.

getLabels()

Gets the labels.

getMultiColumnComponent()

Gets the component controlled by the header.

getMultiColumnData()

Gets the component's JCMultiColumnData instance.

getNumColumns()

Gets the current number of columns.

getParameters()

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

layout()

Positions all labels.

mouseDown(Event)

If at a label boundary, starts a resize.

mouseDrag(Event)

If currently resizing a column, redraws the temporary line.

mouseExit(Event)

Changes the cursor to the default.

mouseExit(Event, int, int)

Sets the cursor to the default cursor if not resizing a column.

mouseMove(Event)

Tracks the cursor.

mouseUp(Event)

If currently resizing a column, resizes the component's column.

preferredHeight()

Returns the height of the largest label.

preferredWidth()

Returns the preferred width of all labels, adding the component's first column's offset.

recalc()

Determines the widths of variable-sized columns and repaints.

removeActionListener(JCActionListener)

Removes the specified listener so it no longer receives action events from the buttons.

setButtons(JCVector)

Creates a JCButton for each label.

HTML param name/value: "Buttons"/comma-separated list of labels

setColumnAlignment(int, int)

Sets a column's alignment.

setColumnAlignments(int[])

Sets the column's alignments.

HTML param name/value: "ColumnAlignments"/comma-separated list of enums

setColumnButtons(JCVector)

Creates a JCButton for each label.

HTML param name/value: "Buttons"/comma-separated list of labels

setColumnLabels(JCVector)

Creates a JCLabel for each label.

HTML param name/value: "Labels"/comma-separated list of labels

setColumnLeftMargin(int, int)

Sets the column's left margin value (pixels) (default: 5).

HTML param name/value: "ColumnLeftMargins"/comma-separated list of ints, one for each column

setColumnRightMargin(int, int)

Sets the column's right margin value (pixels) (default: 5).

HTML param name/value: "ColumnRightMargins"/comma-separated list of ints, one for each column

setColumnWidth(int, int)

Sets the width of a column.

setColumnWidths(int[])

Sets the list of column widths.

setFont(Font)

Sets the font of the component.

setLabels(JCVector)

Creates a JCLabel for each label.

HTML param name/value: "Labels"/comma-separated list of labels

setLayout(LayoutManager)

Sets the layout manager for this container.

setMultiColumnComponent(JCMultiColumnInterface)

Sets the component which will be controlled by the header.

setNumColumns(int)

Sets the current number of columns.

updateParent()

Recalculates column widths, and forces the parent to relayout the header.

 protected JCMultiColumnData data

The data for this component.

 protected JCMultiColumnInterface comp

The component being controlled.

 protected int resize_col

The mouse position, or the column currently being resized.

 protected boolean resizing

True if a column is being resized.

 protected JCVector actionListeners

List of JCActionEvent listeners

 public JCHeader()

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

 public JCHeader(String labels[])

Creates a header with the specified labels. No parameters are read from an HTML file.

 public JCHeader(JCVector labels)

Creates a header with the specified labels. No parameters are read from an HTML file.

See Also:

setLabels

 public JCHeader(String labels[],
                 Applet applet,
                 String name)

Creates a header 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:

setLabels

 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 synchronized void setFont(Font f)

Sets the font of the component. This value may be set from an HTML file using a PARAM tag with a "Font" name and a Font value.

Overrides:

setFont in class Component

See Also:

toFont

 public JCMultiColumnInterface getMultiColumnComponent()

Gets the component controlled by the header.

See Also:

setMultiColumnComponent

 public void setMultiColumnComponent(JCMultiColumnInterface comp)

Sets the component which will be controlled by the header.

 public JCComponent[] getLabels()

Gets the labels.

 public void setColumnLabels(JCVector labels)

Creates a JCLabel for each label.

HTML param name/value: "Labels"/comma-separated list of labels

See Also:

addLabel, addButton

 public void setLabels(JCVector labels)

Creates a JCLabel for each label.

HTML param name/value: "Labels"/comma-separated list of labels

See Also:

addLabel, addButton, toVector

 public void setColumnButtons(JCVector labels)

Creates a JCButton for each label.

HTML param name/value: "Buttons"/comma-separated list of labels

See Also:

addButton, addButton

 public void setButtons(JCVector labels)

Creates a JCButton for each label.

HTML param name/value: "Buttons"/comma-separated list of labels

See Also:

addButton, addButton, toVector

 public JCLabel addLabel(Object label)

Creates a label with the specified value, and adds it to the header.

Returns:

the new label

See Also:

addButton, setLabel

 public JCButton addButton(Object label)

Creates a button with the specified value, and adds it to the header.

Returns:

the new button

See Also:

addButton, setLabel

 public void updateParent()

Recalculates column widths, and forces the parent to relayout the header.

Overrides:

updateParent in class JCContainer

 public void addNotify()

Calculates column widths.

Overrides:

addNotify in class JCContainer

 public synchronized void layout()

Positions all labels.

Overrides:

layout in class Container

 public void recalc()

Determines the widths of variable-sized columns and repaints.

 protected int preferredHeight()

Returns the height of the largest label.

Overrides:

preferredHeight in class JCContainer

 protected int preferredWidth()

Returns the preferred width of all labels, adding the component's first column's offset.

Overrides:

preferredWidth in class JCContainer

 public void addActionListener(JCActionListener l)

Adds the specified listener to receive action events from the buttons.

See Also:

JCActionEvent

 public void removeActionListener(JCActionListener l)

Removes the specified listener so it no longer receives action events from the buttons.

See Also:

addActionListener

 protected boolean mouseMove(Event ev)

Tracks the cursor.

 protected boolean mouseExit(Event ev)

Changes the cursor to the default.

 protected boolean mouseDown(Event ev)

If at a label boundary, starts a resize.

 protected boolean mouseDrag(Event ev)

If currently resizing a column, redraws the temporary line.

 protected boolean mouseUp(Event ev)

If currently resizing a column, resizes the component's column.

 public boolean mouseExit(Event ev,
                          int x,
                          int y)

Sets the cursor to the default cursor if not resizing a column.

Overrides:

mouseExit in class Component

 protected void drawLine(boolean clear,
                         int x)

Draw temporary dashed line while resizing.

Parameters:

clear - If true, the previously-drawn line is erased (and the remaining arguments are ignored).

 public int calcWidth(int col)

Calculates the width of a column. If the multiColumn component's column width is not VARIABLE, it is returned. Otherwise the larger of the label's width and the component's column width is returned.

 public int[] getColumnWidths()

Gets a list of the column widths.

See Also:

setColumnWidths

 public void setColumnWidths(int widths[])

Sets the list of column widths. If a column's value is set to BWTEnum.VARIABLE, the width is set to the widest value in the column.

HTML param name/value: "ColumnWidths" name and a comma-separated list of ints.

 public int getColumnWidth(int col)

Gets the current width of a column, or 0 if the column does not exist.

 public void setColumnWidth(int col,
                            int width)

Sets the width of a column. If the value is set to BWTEnum.VARIABLE, the width is set to the widest value in the column.

 public int getNumColumns()

Gets the current number of columns.

 public void setNumColumns(int v)

Sets the current number of columns. If set to BWTEnum.VARIABLE (default), all labels are displayed.

HTML param name/value: "NumColumns"/int

 public int[] getColumnAlignments()

Gets the column alignments.

 public int getColumnAlignment(int col)

Gets a column's alignment (default: BWTEnum.MIDDLELEFT).

 public void setColumnAlignment(int col,
                                int align)

Sets a column's alignment.

Parameters:

alignment - one of: BWTEnum.TOPLEFT, TOPCENTER, TOPRIGHT, MIDDLELEFT, MIDDLECENTER, MIDDLERIGHT, BOTTOMLEFT, BOTTOMCENTER and BOTTOMRIGHT

 public void setColumnAlignments(int align[])

Sets the column's alignments.

HTML param name/value: "ColumnAlignments"/comma-separated list of enums

Parameters:

align - one of: BWTEnum.TOPLEFT, TOPCENTER, TOPRIGHT, MIDDLELEFT, MIDDLECENTER, MIDDLERIGHT, BOTTOMLEFT, BOTTOMCENTER and BOTTOMRIGHT

 public int getColumnPosition(int col)

Gets the physical position of the left boundary of the column.

 public int getColumnLeftMargin(int col)

Gets the column's left margin value (pixels).

 public void setColumnLeftMargin(int col,
                                 int value)

Sets the column's left margin value (pixels) (default: 5).

HTML param name/value: "ColumnLeftMargins"/comma-separated list of ints, one for each column

 public int getColumnRightMargin(int col)

Gets the column's right margin value (pixels).

 public void setColumnRightMargin(int col,
                                  int value)

Sets the column's right margin value (pixels) (default: 5).

HTML param name/value: "ColumnRightMargins"/comma-separated list of ints, one for each column

 public JCMultiColumnData getMultiColumnData()

Gets the component's JCMultiColumnData instance.

 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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