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|
/*
* This functions allow the user to interact with a datagrid object.
*/
// Global object holding the data for the different grids.
var strutsLayoutDatagridData = new Object();
StrutsLayout = new Object();
// definition of a column
StrutsLayout.Column = function (in_property, in_styleClass, in_type, in_values) {
this.property = in_property;
this.styleClass = in_styleClass;
this.type = in_type;
this.values = in_values;
}
// definition of an option
StrutsLayout.Option = function (in_label, in_value) {
this.label = in_label;
this.value = in_value;
}
// definition of the Struts-Layout datagrid js object.
StrutsLayout.Datagrid = function Datagrid(in_property, in_styleId, in_styleClass, in_styleClass2, in_allowSelection, in_allowMultipleSelection) {
// form property holding the data.
this.property = in_property;
// id of the table element.
this.styleId = in_styleId;
// definition of the columns of the table
this.columns = new Array();
// definition of the styleClass of the rows.
this.styleClass = in_styleClass;
this.styleClass2 = in_styleClass2;
this.rowStyleClassMap = new Object();
// allow selection
this.allowSelection = in_allowSelection;
this.allowMultipleSelection = in_allowMultipleSelection;
// add a column
StrutsLayout.Datagrid.prototype.addColumn = function addColumn(in_property, in_styleClass, in_type, in_values) {
this.columns[this.columns.length] = new StrutsLayout.Column(in_property, in_styleClass, in_type, in_values);
}
// add a styleClass
StrutsLayout.Datagrid.prototype.addStyleClass = function addStyleClass(in_styleName, in_styleClass) {
this.rowStyleClassMap[in_styleName] = in_styleClass;
}
// set the state
StrutsLayout.Datagrid.prototype.initState = function initState(in_index, in_state) {
var table = document.getElementById(this.styleId);
var row = table.rows[in_index+1]; // row 0 is header.
if (in_state!=null && in_state!="") {
row.className = this.rowStyleClassMap[in_state];
}
var hidden = this.createStateElement(in_index, in_state);
table.parentNode.appendChild(hidden);
}
this.getDatagridRowStateField = getDatagridRowStateField;
this.addDatagridCell = addDatagridCell;
this.getDatagridLinesWithState = getDatagridLinesWithState;
this.createStateElement = createStateElement;
this.unselectRows = unselectRows;
this.selectDatagridLine = selectDatagridLine;
// return the hidden field holding the state of the specified line.
function getDatagridRowStateField(rowIndex) {
var element = document.forms[0].elements[this.property + ".dataState[" + (rowIndex-1) + "]"];
if (element==null) {
// IE bug
element = document.getElementById(this.property + ".dataState[" + (rowIndex-1) + "]");
}
return element;
}
// select a datagrid line
function selectDatagridLine(row) {
var table;
var index;
if (row.parentNode) {
// Get the parent table.
table = row.parentNode.parentNode;
// Get the row index.
for (index = 0; index < table.rows.length; index++) {
if (row==table.rows[index]) {
break;
}
}
} else {
index = parseInt(row) - 1;
table = document.getElementById(this.styleId);
row = table.rows[index];
}
// Get the row status.
var hidden = this.getDatagridRowStateField(index);
var status = hidden.value;
if (status=="selected") {
status = "";
} else {
status = "selected";
}
// Set the new row status.
hidden.value = status;
if (status=="") {
if (index % 2) {
row.className = this.styleClass;
} else {
row.className = this.styleClass2;
}
} else {
row.className = this.rowStyleClassMap["selected"];
}
// If single selection is used, unselect all other rows.
if (!this.allowMultipleSelection) {
this.unselectRows(table, index);
}
}
// unselect all rows other than the one specified.
function unselectRows(table, index) {
var i;
var rows;
var hidden;
for (i = 1; i < table.rows.length; i++) {
if (i!=index) {
hidden = this.getDatagridRowStateField(i);
if (hidden.value=="selected") {
row = table.rows[i];
if (i % 2) {
row.className = this.styleClass;
} else {
row.className = this.styleClass2;
}
hidden.value = "";
}
}
}
}
function createStateElement(index, value) {
var hidden = document.createElement("INPUT");
hidden.setAttribute('type', 'hidden');
hidden.setAttribute('name', this.property + ".dataState[" + (index) + "]");
hidden.setAttribute('value', value);
hidden.id = this.property + ".dataState[" + (index) + "]"; // ie bug :(
return hidden;
}
function addDatagridCell(row, index, property, styleClass, type, values) {
var newCell = row.insertCell(row.cells.length);
newCell.className = styleClass;
var inputElementName = type=="select"? "SELECT" : "INPUT";
var input = document.createElement(inputElementName);
if (type!="select") {
input.setAttribute('type', type==null ? "text" : type);
}
input.setAttribute('name', property + "[" + index + "]");
if (type=="checkbox") {
input.setAttribute('value', "true");
} else if (type=="select") {
for (i=0;i<values.length; i++) {
var option = document.createElement("OPTION");
option.setAttribute("value", values[i].value);
option.innerHTML = values[i].label;
input.appendChild(option);
}
} else {
input.setAttribute('value', "");
}
newCell.appendChild(input);
return newCell;
}
// return the lines having the specified state.
function getDatagridLinesWithState(state) {
var i = 0;
var hidden = document.forms[0].elements[this.property + ".dataState[" + i + "]"];
var array = new Array();
while (hidden!=null) {
if (hidden.value==state) {
array[i] = true;
}
i++;
hidden = document.forms[0].elements[this.property + ".dataState[" + i + "]"];
}
return array;
}
}
// add a line, PUBLIC
StrutsLayout.addDatagridLine = function(property) {
// Get the datagrid.
var datagrid = strutsLayoutDatagridData[property];
// Get the table object.
var table = document.getElementById(datagrid.styleId);
// Create a new line.
var newRow = table.insertRow(table.rows.length);
var odd = table.rows.length % 2;
newRow.className = !odd ? datagrid.styleClass : datagrid.styleClass2;
if (datagrid.allowSelection) {
newRow.onclick = new Function("strutsLayoutDatagridData['" + property + "'].selectDatagridLine(" + table.rows.length + ");");
if (document.all) {
// Does not work on Gecko
newRow.style.cursor = "hand";
} else {
// Break on IE5.x
newRow.style.cursor = "pointer";
}
}
var newCell;
for (i in datagrid.columns) {
var column = datagrid.columns[i];
var cellStyle = column.styleClass;
var type = column.type;
var values = column.values;
newCell = datagrid.addDatagridCell(newRow, table.rows.length-2, property + "." + column.property, cellStyle, type, values);
}
var hidden = datagrid.createStateElement(table.rows.length-2, "");
table.parentNode.appendChild(hidden);
}
// set the state of the selected lines.
StrutsLayout.setDatagridLineState = function(property, state) {
// Get the datagrid.
var datagrid = strutsLayoutDatagridData[property];
// Get the table object.
var table = document.getElementById(datagrid.styleId);
// Get the selected items.
var selectedLines = datagrid.getDatagridLinesWithState("selected");
for (i in selectedLines) {
// Set the state of the line to "removed".
document.forms[0].elements[property + ".dataState[" + i + "]"].value = state;
// Hide the line
table.rows[parseInt(i)+1].className = datagrid.rowStyleClassMap[state];
}
} |
