public class PickerShellTableSort {
private Table table;
private Image upImage;
private Image downImage;
private int[] sortFlags;
private int[] sortColIndexes;
public PickerShellTableSort(Table table) {
int[] sortCols = new int[table.getColumnCount()];
for (int i = 1; i < sortCols.length; i++) {
sortCols[i] = i;
}
this.table = table;
this.sortColIndexes = sortCols; //需要排序的索引
this.sortFlags = new int[table.getColumnCount()];
init();
}
private void init() {
for (int i = 0; i < sortColIndexes.length; i++) {
final int sortColIndex = this.sortColIndexes[i];
TableColumn col = table.getColumn(sortColIndex);
col.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
columnHandleEvent(event, sortColIndex);
}
});
}
this.upImage = FrameCommonActivator.getImageDescriptor("icons/up.gif").createImage();
this.downImage = FrameCommonActivator.getImageDescriptor("icons/down.gif").createImage();
}
private void columnHandleEvent(Event event, int sortColIndex) {
try {
for (int i = 0; i < sortColIndexes.length; i++) {
TableColumn tabCol = table.getColumn(i);
tabCol.setImage(null);
}
boolean selectColumnType = this.isStringOrNumberType(sortColIndex);
if (this.sortFlags[sortColIndex] == 1) {
clearSortFlags();
this.sortFlags[sortColIndex] = -1;
if(selectColumnType) {
this.addNumberSorter(table.getColumn(sortColIndex), true);
} else {
this.addStringSorter(table.getColumn(sortColIndex), true);
}
table.getColumn(sortColIndex).setImage(this.upImage);
} else {
this.sortFlags[sortColIndex] = 1;
if(selectColumnType) {
this.addNumberSorter(table.getColumn(sortColIndex), false);
} else {
this.addStringSorter(table.getColumn(sortColIndex), false);
}
table.getColumn(sortColIndex).setImage(this.downImage);
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @param table
* @param column
* @param isAscend
*/
private void addStringSorter(TableColumn column,boolean isAscend) {
Collator comparator = Collator.getInstance(Locale.getDefault());
int columnIndex = getColumnIndex(table, column);
TableItem[] items = table.getItems();
//使用冒泡法進(jìn)行排序
for (int i = 1; i < items.length; i++) {
String str2value = items[i].getText(columnIndex);
if(str2value.equalsIgnoreCase("")){
//當(dāng)遇到表格中的空項(xiàng)目時(shí)，就停止往下檢索排序項(xiàng)目
break;
}
for (int j = 0; j < i; j++) {
String str1value = items[j].getText(columnIndex);
boolean isLessThan = comparator.compare(str2value, str1value) < 0;
if ((isAscend && isLessThan) || (!isAscend && !isLessThan)) {
String[] values = getTableItemText(table, items[i]);
Object obj = items[i].getData();
items[i].dispose();
TableItem item = new TableItem(table, SWT.NONE, j);
item.setText(values);
item.setData(obj);
items = table.getItems();
break;
}
}
}
table.setSortColumn(column);
table.setSortDirection((isAscend ? SWT.UP : SWT.DOWN));
isAscend = !isAscend;
}
private void addNumberSorter(TableColumn column,boolean isAscend) {
int columnIndex = getColumnIndex(table, column);
TableItem[] items = table.getItems();
//使用冒泡法進(jìn)行排序
for (int i = 1; i < items.length; i++) {
String strvalue2 = items[i].getText(columnIndex);
if(strvalue2.equalsIgnoreCase("")){
//當(dāng)遇到表格中的空項(xiàng)目時(shí)，就停止往下檢索排序項(xiàng)目
break;
}
for (int j = 0; j < i; j++) {
String strvalue1 = items[j].getText(columnIndex);
//將字符串類型數(shù)據(jù)轉(zhuǎn)化為float類型
float numbervalue1=Float.valueOf(strvalue1);
float numbervalue2=Float.valueOf(strvalue2);
boolean isLessThan =false;
if(numbervalue2<numbervalue1){
isLessThan =true;
}
if ((isAscend && isLessThan) || (!isAscend && !isLessThan)) {
String[] values = getTableItemText(table, items[i]);
Object obj = items[i].getData();
items[i].dispose();
TableItem item = new TableItem(table, SWT.NONE, j);
item.setText(values);
item.setData(obj);
items = table.getItems();
break;
}
}
}
table.setSortColumn(column);
table.setSortDirection((isAscend ? SWT.UP : SWT.DOWN));
isAscend = !isAscend;
}
private int getColumnIndex(Table table, TableColumn column) {
TableColumn[] columns = table.getColumns();
for (int i = 0; i < columns.length; i++) {
if (columns[i].equals(column))
return i;
}
return -1;
}
private String[] getTableItemText(Table table, TableItem item) {
int count = table.getColumnCount();
String[] strs = new String[count];
for (int i = 0; i < count; i++) {
strs[i] = item.getText(i);
}
return strs;
}
private void clearSortFlags() {
for (int i = 0; i < table.getColumnCount(); i++) {
this.sortFlags[i] = 0;
}
}
/**
* 判斷當(dāng)前選中列的數(shù)據(jù)類型
* @return
*/
private boolean isStringOrNumberType(int selectColumnIndex) {
boolean isok = false ;
TableItem[] items = table.getItems();
String[] str = new String[items.length];
for (int i = 0; i < items.length; i++) {
str[i] = items[i].getText(selectColumnIndex);
}
for (int i = 0; i < str.length; i++) {
String string = str[i];
isok = string.matches("^(-|\\+)?\\d+\\.?\\d*$");
//如果這一列中有一個(gè)是字符串，也按字符串排序
if(!isok) {
return isok;
}
}
return isok ;
}
}