Java 通过单击列标题进行SWT表排序
在swt表中-字符串排序工作如何对整型值、双精度值和日期值进行排序。这只适用于字符串升序。有谁能提出更好的方法吗Java 通过单击列标题进行SWT表排序,java,swt,Java,Swt,在swt表中-字符串排序工作如何对整型值、双精度值和日期值进行排序。这只适用于字符串升序。有谁能提出更好的方法吗 TableItem item = new TableItem(table, SWT.NONE); item.setText(new String[] { "1", "v", "1.1", "20/03/2013" }); item = new TableItem(table, SWT.NONE); item.setText(new String[] {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "1", "v", "1.1", "20/03/2013" });
item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "10", "z", "1.5", "20/04/2013" });
item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "3", "a", "1.3", "30/01/2013" });
Listener sortListener = new Listener() {
public void handleEvent(Event e) {
TableItem[] items = table.getItems();
Collator collator = Collator.getInstance(Locale.getDefault());
TableColumn column = (TableColumn) e.widget;
int index = column == tblclmnNumber ? 0 : 1;
for (int i = 1; i < items.length; i++) {
String value1 = items[i].getText(index);
for (int j = 0; j < i; j++) {
String value2 = items[j].getText(index);
if (collator.compare(value1, value2) < 0) {
String[] values = { items[i].getText(0),
items[i].getText(1), items[i].getText(2),
items[i].getText(3) };
items[i].dispose();
TableItem item = new TableItem(table, SWT.NONE, j);
item.setText(values);
items = table.getItems();
break;
}
}
}
table.setSortColumn(column);
}
};
tblclmnNumber.addListener(SWT.Selection, sortListener);
tblclmnName.addListener(SWT.Selection, sortListener);
tblclmnDeci.addListener(SWT.Selection, sortListener);
tblclmnDate.addListener(SWT.Selection, sortListener);
table.setSortColumn(tblclmnNumber);
table.setSortDirection(SWT.UP);
TableItem项目=新的TableItem(表,SWT.NONE);
项目.setText(新字符串[]{“1”、“v”、“1.1”、“20/03/2013”});
项目=新表项目(表,SWT.NONE);
项目.setText(新字符串[]{“10”、“z”、“1.5”、“20/04/2013”});
项目=新表项目(表,SWT.NONE);
项目.setText(新字符串[]{“3”、“a”、“1.3”、“30/01/2013”});
Listener sortListener=new Listener(){
公共无效handleEvent(事件e){
TableItem[]items=table.getItems();
Collator-Collator=Collator.getInstance(Locale.getDefault());
TableColumn=(TableColumn)e.widget;
int index=列==TBLCLMNNNUMBER?0:1;
对于(int i=1;i
我修改了带有排序的SWT代码段,以显示如何对具有不同数据类型的列进行排序
/*
* Table example snippet: sort a table by column
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
public class SortTable {
private TableRow rows[] = new TableRow[] {
new TableRow(1, "aaa", new Date(1363784269000L)),
new TableRow(2, "abc", new Date(1367784269000L)),
new TableRow(3, "efc", new Date(1363584269000L)),
new TableRow(4, "ccc", new Date(1363734269000L)),
};
private Table table;
private TableColumn intColumn;
private TableColumn strColumn;
private TableColumn dateColumn;
public SortTable() {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
table = new Table(shell, SWT.BORDER);
table.setHeaderVisible(true);
intColumn = new TableColumn(table, SWT.NONE);
intColumn.setText("int");
intColumn.setWidth(50);
strColumn = new TableColumn(table, SWT.NONE);
strColumn.setText("string");
strColumn.setWidth(50);
dateColumn = new TableColumn(table, SWT.NONE);
dateColumn.setText("date");
dateColumn.setWidth(100);
updateTable();
Listener sortListener = new Listener() {
public void handleEvent(Event e) {
TableColumn column = (TableColumn) e.widget;
if (column == intColumn) Arrays.sort(rows, BY_VAL);
if (column == strColumn) Arrays.sort(rows, BY_STR);
if (column == dateColumn) Arrays.sort(rows, BY_DATE);
table.setSortColumn(column);
updateTable();
}
};
intColumn.addListener(SWT.Selection, sortListener);
strColumn.addListener(SWT.Selection, sortListener);
dateColumn.addListener(SWT.Selection, sortListener);
shell.setSize(shell.computeSize(SWT.DEFAULT, SWT.DEFAULT).x, 300);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private void updateTable() {
table.removeAll();
for (TableRow row : rows) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(row.asString());
}
}
public final Comparator<TableRow> BY_VAL = new Comparator<TableRow>() {
@Override
public int compare(TableRow o1, TableRow o2) {
if (o1.val < o2.val) return -1;
if (o1.val > o2.val) return 1;
return 0;
}
};
public final Comparator<TableRow> BY_STR = new Comparator<TableRow>() {
@Override
public int compare(TableRow o1, TableRow o2) {
return o1.str.compareTo(o2.str);
}
};
public final Comparator<TableRow> BY_DATE = new Comparator<TableRow>() {
@Override
public int compare(TableRow o1, TableRow o2) {
return o1.date.compareTo(o2.date);
}
};
private class TableRow {
private int val;
private String str;
private Date date;
private SimpleDateFormat format = new SimpleDateFormat();
public TableRow(int val, String str, Date date) {
this.val = val;
this.str = str;
this.date = date;
}
public String[] asString() {
return new String[] {Integer.toString(val), str, format.format(date)};
}
}
public static void main(String[] args) {
new SortTable();
}
}
/*
*表示例代码段:按列对表进行排序
*
*有关所有SWT示例代码段的列表,请参见
* http://www.eclipse.org/swt/snippets/
*
*@自3.2
*/
导入java.text.simpleDataFormat;
导入java.util.array;
导入java.util.Comparator;
导入java.util.Date;
导入org.eclipse.swt.swt;
导入org.eclipse.swt.layout.FillLayout;
导入org.eclipse.swt.widgets.Display;
导入org.eclipse.swt.widgets.Event;
导入org.eclipse.swt.widgets.Listener;
导入org.eclipse.swt.widgets.Shell;
导入org.eclipse.swt.widgets.Table;
导入org.eclipse.swt.widgets.TableColumn;
导入org.eclipse.swt.widgets.TableItem;
公共类可排序{
私有表行[]=新表行[]{
新表行(1,“aaa”,新日期(1363784269000L)),
新表格行(2,“abc”,新日期(1367784269000L)),
新表格行(3,“efc”,新日期(1363584269000L)),
新表行(4,“ccc”,新日期(1363734269000L)),
};
私人餐桌;
private TableColumn intColumn;
私有表列结构列;
私有表列dateColumn;
公共排序表(){
显示=新显示();
外壳=新外壳(显示);
setLayout(新的FillLayout());
表=新表(外壳、SWT.边框);
表.setheadervible(true);
intColumn=新表列(表,SWT.NONE);
intColumn.setText(“int”);
intColumn.setWidth(50);
strColumn=新表列(表,SWT.NONE);
strColumn.setText(“字符串”);
立柱设置宽度(50);
dateColumn=新表列(表,SWT.NONE);
dateColumn.setText(“日期”);
dateColumn.setWidth(100);
updateTable();
Listener sortListener=new Listener(){
公共无效handleEvent(事件e){
TableColumn=(TableColumn)e.widget;
if(column==intColumn)array.sort(rows,BY_VAL);
if(column==strColumn)Arrays.sort(rows,BY_STR);
if(column==dateColumn)Arrays.sort(行,按日期);
表1.setSortColumn(列);
updateTable();
}
};
addListener(SWT.Selection,sortListener);
strColumn.addListener(SWT.Selection,sortListener);
dateColumn.addListener(SWT.Selection,sortListener);
shell.setSize(shell.computeSize(SWT.DEFAULT,SWT.DEFAULT).x300);
shell.open();
而(!shell.isDisposed()){
如果(!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
私有void updateTable(){
table.removeAll();
用于(表格行:行){
TableItem项目=新的TableItem(表,SWT.NONE);
item.setText(row.asString());
}
}
公共最终比较器由_VAL=新比较器()提供{
@凌驾
公共整数比较(表行o1,表行o2){
如果(o1.valo2.val)返回1;
返回0;
}
};
_STR=新比较器()的公共最终比较器{
@凌驾
公共整数比较(表行o1,表行o2){
返回o1.str.compareTo(o2.str);
}
};
截止日期的公共最终比较器=新比较器(){
@凌驾
公共整数比较(表行o1,表行o2){
返回o1.日期比较(o2.日期);
}
};
私人类表格行{
私人国际旅行社;
私有字符串str;
私人日期;
私有SimpleDataFormat格式=新SimpleDataFormat();
公共表行(int-val,String-str,Date){
this.val=val;
this.str=str;
this.date=日期;
}
公众的
intColumn = new TableColumn(table, SWT.NONE);
intColumn.setText("int");
intColumn.setWidth(50);
intColumn.setData(new Comparator<TableItem>() {
@Override
public int compare(TableItem t1, TableItem t2) {
int i1 = Integer.parseInt(t1.getText(0));
int i2 = Integer.parseInt(t2.getText(0));
if (i1.val < i2.val) return -1;
if (i1.val > i2.val) return 1;
return 0;
}
};
strColumn = new TableColumn(table, SWT.NONE);
strColumn.setText("string");
strColumn.setWidth(50);
strColumn.setData(new Comparator<TableItem>() {
@Override
public int compare(TableItem t1, TableItem t2) {
return t1.getText(1).compareTo(t2.getText(1));
}
};
dateColumn = new TableColumn(table, SWT.NONE);
dateColumn.setText("date");
dateColumn.setWidth(100);
dateColumn.setData(new Comparator<TableItem>() {
@Override
public int compare(TableItem t1, TableItem t2) {
return Date.parse(t1.getText(2)).compareTo(Date.parse(t2.getText(2)));
}
};
Listener sortListener = e -> {
TableColumn sortColumn = table.getSortColumn();
TableColumn selectedColumn = (TableColumn) e.widget;
int dir = table.getSortDirection();
if (sortColumn == selectedColumn) {
dir = dir == SWT.UP ? SWT.DOWN : SWT.UP;
} else {
table.setSortColumn(selectedColumn);
dir = SWT.UP;
}
TableItem[] items = table.getItems();
final Comparator<TableItem> comparator = (Comparator<TableItem>) selectedColumn.getData();
for (int i = 1; i < items.length; i++) {
for (int j = 0; j < i; j++) {
if ((comparator.compare(items[i], items[j]) < 0 && dir == SWT.UP) || (comparator.compare(items[i], items[j]) > 0 && dir == SWT.DOWN)) {
String[] oldItem = new String[table.getColumnCount()];
for (int h = 0; h < table.getColumnCount(); h++) {
item[h] = items[i].getText(h);
}
items[i].dispose();
TableItem newItem = new TableItem(table, SWT.NONE, j);
newItem.setText(oldItem);
items = table.getItems();
break;
}
}
}
table.setSortDirection(dir);
};