1998-09-09 04:52:38 +04:00
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/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is the Grendel mail/news client.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1997
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* Netscape Communications Corporation. All Rights Reserved.
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*
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* Created: Will Scullin <scullin@netscape.com>, 21 Aug 1997.
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*/
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package grendel.widgets;
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import java.awt.AWTEventMulticaster;
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import java.util.Vector;
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import java.util.Enumeration;
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import java.util.StringTokenizer;
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1999-01-09 06:55:32 +03:00
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import javax.swing.event.ChangeEvent;
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1998-09-09 04:52:38 +04:00
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public class ColumnModelImp implements ColumnModel, ColumnChangeListener {
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Vector fColumns = new Vector();
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ColumnModelListener fListeners = null;
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int fMargin = 0;
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Column fSelectedColumn = null;
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public void addColumn(Column aColumn) {
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addColumnAt(aColumn, fColumns.size());
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}
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public void addColumnAt(Column aColumn, int aIndex) {
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aColumn.addColumnChangeListener(this);
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fColumns.insertElementAt(aColumn, aIndex);
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if (fListeners != null) {
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fListeners.columnAdded(new ColumnModelEvent(this, 0, aIndex));
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}
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}
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public void removeColumn(Column aColumn) {
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aColumn.removeColumnChangeListener(this);
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int idx = getColumnIndex(aColumn);
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if (idx > -1) {
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fColumns.removeElementAt(idx);
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if (fListeners != null) {
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fListeners.columnRemoved(new ColumnModelEvent(this, idx, 0));
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}
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}
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}
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public void moveColumn(int aSource, int aDest) {
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int i;
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if (aSource < aDest) {
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for (i = aSource; i < aDest; i++) {
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Object a = fColumns.elementAt(i);
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fColumns.removeElementAt(i);
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fColumns.insertElementAt(a, i + 1);
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}
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if (fListeners != null) {
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fListeners.columnMoved(new ColumnModelEvent(this, aSource, aDest));
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}
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} else if (aDest < aSource) {
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for (i = aSource; i > aDest; i--) {
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Object a = fColumns.elementAt(i);
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fColumns.removeElementAt(i);
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fColumns.insertElementAt(a, i - 1);
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}
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if (fListeners != null) {
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fListeners.columnMoved(new ColumnModelEvent(this, aSource, aDest));
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}
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} // else same, do nothing
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}
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public int getColumnCount() {
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return fColumns.size();
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}
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public Column getColumn(int aIndex) {
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return (Column) fColumns.elementAt(aIndex);
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}
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public Column getColumn(Object aID) {
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int count = getColumnCount();
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for (int i = 0; i < count; i++) {
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Column column = getColumn(i);
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if (column.getID().equals(aID)) {
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return column;
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}
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}
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return null;
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}
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private Column getColumn(String aID) {
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int count = getColumnCount();
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for (int i = 0; i < count; i++) {
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Column column = getColumn(i);
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if (column.getID().toString().equals(aID)) {
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return column;
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}
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}
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return null;
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}
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public Enumeration getColumns() {
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return fColumns.elements();
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}
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public int getColumnIndex(Column aColumn) {
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return fColumns.indexOf(aColumn);
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}
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public int getColumnIndexAtX(int aX) {
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if (aX < 0) {
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return -1;
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}
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int count = getColumnCount();
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int width = 0;
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for (int i = 0; i < count; i++) {
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Column column = getColumn(i);
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width += column.getWidth() + fMargin;
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if (aX <= width) {
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return i;
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}
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}
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return -1;
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}
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public void setColumnMargin(int aMargin) {
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fMargin = aMargin;
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if (fListeners != null) {
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fListeners.columnMarginChanged(new ChangeEvent(this));
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}
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}
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public int getColumnMargin() {
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return fMargin;
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}
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public int getTotalColumnWidth() {
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int i, res = 0;
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for (i = 0; i < fColumns.size(); i++) {
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res += getColumn(i).getWidth() + fMargin;
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}
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return res;
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}
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public void setSelectedColumn(Column aColumn) {
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fSelectedColumn = aColumn;
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if (fListeners != null) {
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fListeners.columnSelectionChanged(new ChangeEvent(this));
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}
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}
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public Column getSelectedColumn() {
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return fSelectedColumn;
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}
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public synchronized String getPrefString() {
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StringBuffer pref = new StringBuffer();
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Integer intVal = new Integer(0);
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for (int i = 0; i < fColumns.size(); i++) {
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pref.append(getColumn(i).getID().toString());
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pref.append(",");
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pref.append(Integer.toString(getColumn(i).getWidth()));
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if (i < fColumns.size() - 1) {
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pref.append(",");
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}
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}
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return pref.toString();
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}
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public synchronized void setPrefString(String aString) {
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StringTokenizer tokens = new StringTokenizer(aString, ",", false);
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int i = 0;
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while (tokens.hasMoreTokens()) {
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String id = tokens.nextToken();
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String width = tokens.nextToken();
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Column column = getColumn(id);
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if (column != null) {
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column.setWidth(Integer.parseInt(width));
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moveColumn(getColumnIndex(column), i);
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}
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i++;
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}
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}
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//
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// Listener support
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//
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public synchronized void addColumnModelListener(ColumnModelListener aListener) {
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fListeners = ColumnModelMulticaster.add(fListeners, aListener);
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}
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public synchronized void removeColumnModelListener(ColumnModelListener aListener) {
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fListeners = ColumnModelMulticaster.remove(fListeners, aListener);
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}
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//
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// ColumnListener Interface
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//
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public void columnWidthChanged(ChangeEvent aEvent) {
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int idx = fColumns.indexOf(aEvent.getSource());
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if (fListeners != null) {
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fListeners.columnWidthChanged(new ColumnModelEvent(this, 0, idx));
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}
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}
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}
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class ColumnModelMulticaster implements ColumnModelListener {
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ColumnModelListener a, b;
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public ColumnModelMulticaster(ColumnModelListener a, ColumnModelListener b) {
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this.a = a;
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this.b = b;
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}
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public static ColumnModelListener add(ColumnModelListener a, ColumnModelListener b) {
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if (a == null) return b;
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if (b == null) return a;
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return new ColumnModelMulticaster(a, b);
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}
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public static ColumnModelListener remove(ColumnModelListener a, ColumnModelListener b) {
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if (a == b || a == null) {
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return null;
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} else if (a instanceof ColumnModelMulticaster) {
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return ((ColumnModelMulticaster)a).remove(b);
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} else {
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return a; // it's not here
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}
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}
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public ColumnModelListener remove(ColumnModelListener c) {
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if (c == a) return b;
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if (c == b) return a;
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ColumnModelListener a2 = remove(a, c);
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ColumnModelListener b2 = remove(b, c);
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if (a2 == a && b2 == b) {
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return this; // it's not here
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}
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return add(a2, b2);
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}
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public void columnAdded(ColumnModelEvent aEvent) {
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a.columnAdded(aEvent);
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b.columnAdded(aEvent);
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}
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public void columnRemoved(ColumnModelEvent aEvent) {
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a.columnRemoved(aEvent);
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b.columnRemoved(aEvent);
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}
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public void columnMoved(ColumnModelEvent aEvent) {
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a.columnMoved(aEvent);
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b.columnMoved(aEvent);
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}
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public void columnMarginChanged(ChangeEvent aEvent) {
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a.columnMarginChanged(aEvent);
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b.columnMarginChanged(aEvent);
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}
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public void columnSelectionChanged(ChangeEvent aEvent) {
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a.columnSelectionChanged(aEvent);
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b.columnSelectionChanged(aEvent);
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}
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public void columnWidthChanged(ColumnModelEvent aEvent) {
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a.columnWidthChanged(aEvent);
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b.columnWidthChanged(aEvent);
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}
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}
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