gecko-dev/grendel/widgets/Column.java

331 строка
6.9 KiB
Java

/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1997
* Netscape Communications Corporation. All Rights Reserved.
*
* Created: Will Scullin <scullin@netscape.com>, 21 Aug 1997.
*
* Contributors: Jeff Galyan <talisman@anamorphic.com>
*/
package grendel.widgets;
import java.util.Vector;
import javax.swing.Icon;
import javax.swing.event.ChangeEvent;
/**
* A Column is a vertical display unit for a table that maintains width, rendering,
* and header display data. A column has no data model, thus it is only useful
* in conjunction with another UI component that provides a one.
*/
public class Column {
Icon fIcon;
String fTitle;
Object fID;
int fWidth, fMinWidth, fMaxWidth;
boolean fResizeable;
boolean fSelectable;
Vector fListeners = new Vector();
CellRenderer fCellRenderer = new DefaultCellRenderer();
CellEditor fCellEditor;
HeaderRenderer fHeaderRenderer = new DefaultHeaderRenderer();
/**
* Constructs a column with the given ID and title
*/
public Column(Object aID, String aTitle) {
this(aID);
fTitle = new String(aTitle);
}
/**
* Contructs a column with the given ID and icon
*/
public Column(Object aID, Icon aIcon) {
this(aID);
fIcon = aIcon;
}
/**
* Constructs a column with the given ID
*/
public Column(Object aID) {
fID = aID;
fMinWidth = 10;
fWidth = 100;
fMaxWidth = 1000;
fResizeable = true;
}
/**
* Sets the width of the column.
* @see getWidth()
*/
public void setWidth(int aWidth) {
if (fWidth != aWidth) {
fWidth = aWidth;
notifyWidthChange();
}
}
/**
* Returns the current column width
* @see setWidth()
*/
public int getWidth() {
return fWidth;
}
/**
* Sets the minimum column width. This width
* is for reference only, it is not enforced
* @see getMinWidth()
*/
public void setMinWidth(int aWidth) {
fMinWidth = aWidth;
}
/**
* Returns the minimum column width. This width
* is for reference only, it is not enforced
* @see setMinWidth()
*/
public int getMinWidth() {
return fMinWidth;
}
/**
* Sets the maximum column width. This width
* is for reference only, it is not enforced
* @see getMaxWidth()
*/
public void setMaxWidth(int aWidth) {
fMaxWidth = aWidth;
}
/**
* returns the maximum column width. This width
* is for reference only, it is not enforced
* @see setMaxWidth()
*/
public int getMaxWidth() {
return fMaxWidth;
}
/**
* Sets whether or not the column is resizable. This
* attribute is for reference only, it is not enforced.
* @see isResizeable()
*/
public void setResizeable(boolean aResizeable) {
fResizeable = aResizeable;
}
/**
* Returns whether or not the column is resizable. This
* attribute is for reference only, it is not enforced.
* @see setResizeable()
*/
public boolean isResizeable() {
return fResizeable;
}
/**
* Sets whether or not the column is selectable.
* @see isSelectable()
*/
public void setSelectable(boolean aSelectable) {
fSelectable = aSelectable;
}
/**
* Returns whether or not the column is resizable. This
* attribute is for reference only, it is not enforced.
* @see setSelectable()
*/
public boolean isSelectable() {
return fSelectable;
}
/**
* Sets the column title. This is intended to be displayed
* in the header above the column.
* @see getTitle()
*/
public void setTitle(String aTitle) {
fTitle = new String(aTitle);
}
/**
* Returns the column title.
* @see setTitle()
*/
public String getTitle() {
return fTitle;
}
/**
* Sets the icon for the column. This is intended to be
* displayed in the header above the column
*
* @see getIcon()
*/
public void setIcon(Icon aIcon) {
fIcon = aIcon;
}
/**
* Returns the column icon
*
* @see setIcon()
*/
public Icon getIcon() {
return fIcon;
}
/**
* Sets the column's user defined id. The user can define
* whatever value they find meaningful for this purpose.
* @see getID()
*/
public void setID(Object aID) {
fID = aID;
}
/**
* Returns the column's user defined id.
* @see setID()
*/
public Object getID() {
return fID;
}
/**
* Sets the cell renderer for this column. This renderer
* is used for column data provided by another source.
* @see getCellRenderer()
* @see CellRenderer
*/
public void setCellRenderer(CellRenderer aRenderer) {
fCellRenderer = aRenderer;
}
/**
* Returns the cell renderer for this column.
* @see setCellRenderer()
* @see CellRenderer
*/
public CellRenderer getCellRenderer() {
return fCellRenderer;
}
/**
* Not implemented
*/
public void setCellEditor(CellEditor aEditor) {
fCellEditor = aEditor;
}
/**
* Not implemented
*/
public CellEditor getCellEditor() {
return fCellEditor;
}
/**
* Sets the column's header renderer. This renders the
* column caption in a space provided by that object
* @see getHeaderRenderer()
* @see javax.swing.CellRenderer
*/
public void setHeaderRenderer(HeaderRenderer aRenderer) {
fHeaderRenderer = aRenderer;
}
/**
* Returns the column's header renderer
* @see setHeaderRenderer()
*/
public HeaderRenderer getHeaderRenderer() {
return fHeaderRenderer;
}
/**
* Adds a ColumnChangeListener. The listener is notified whenever
* a significant attribute changes. Currently this only includes
* the column width, but this will expand.
* @see removeColumnListener()
* @see ColumnChangeListener
*/
public void addColumnChangeListener(ColumnChangeListener aListener) {
fListeners.addElement(aListener);
}
/**
* Removes a ColumnChangeListener.
* @see addColumnChangeListener.
*/
public void removeColumnChangeListener(ColumnChangeListener aListener) {
fListeners.removeElement(aListener);
}
/**
* Used internally
*/
void notifyWidthChange() {
ChangeEvent event = new ChangeEvent(this);
for (int i = 0; i < fListeners.size(); i++) {
ColumnChangeListener listener =
(ColumnChangeListener) fListeners.elementAt(i);
listener.columnWidthChanged(event);
}
}
}