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egroupware_official/etemplate/js/et2_dataview_model_columns.js

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JavaScript
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/**
* EGroupware eTemplate2 - Class which contains a the columns model
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage dataview
* @link http://www.egroupware.org
* @author Andreas Stöckel
* @copyright Stylite 2011
* @version $Id$
*/
"use strict";
/*egw:uses
et2_inheritance;
*/
var ET2_COL_TYPE_DEFAULT = 0;
var ET2_COL_TYPE_NAME_ICON_FIXED = 1;
var ET2_COL_VISIBILITY_ALWAYS = 0;
var ET2_COL_VISIBILITY_VISIBLE = 1;
var ET2_COL_VISIBILITY_INVISIBLE = 2;
var ET2_COL_VISIBILITY_ALWAYS_NOSELECT = 3;
/**
* Class which stores the data of a single column.
*
* @augments Class
*/
var et2_dataview_column = Class.extend({
attributes: {
"id": {
"name": "ID",
"type": "string",
"description": "Unique identifier for this column. It is used to " +
"store changed column widths or visibilities."
},
"visibility": {
"name": "Visibility",
"type": "integer",
"default": ET2_COL_VISIBILITY_VISIBLE,
"description": "Defines the visibility state of this column."
},
"caption": {
"name": "Caption",
"type": "string",
"description": "Caption of the column as it is displayed in the " +
"select columns popup."
},
"type": {
"name": "Column type",
"type": "integer",
"default": ET2_COL_TYPE_DEFAULT,
"description": "Type of the column"
},
"width": {
"name": "Width",
"type": "dimension",
"default": "auto",
"description": "Width of the column."
},
"maxWidth": {
"name": "Maximum width",
"type": "integer",
"default": 0,
"description": "Maximum width of the column"
}
},
/**
* Constructor
*
* @param _attrs
* @memberOf et2_dataview_column
*/
init: function(_attrs) {
this.fixedWidth = false;
this.relativeWidth = false;
// Do the sanity check on the attributes and load them
this.generateAttributeSet(_attrs);
this.initAttributes(_attrs);
},
set_width: function(_value) {
// Parse the width parameter. Posible values are:
// 1. "100" => fixedWidth 100px
// 2. "100px" => fixedWidth 100px
// 3. "50%" => relativeWidth 50%
// 4. "auto" => fixedWidth false, relativeWidth false
this.relativeWidth = false;
this.fixedWidth = false;
var w = _value;
if (w.charAt(w.length - 1) == "%" && !isNaN(w.substr(0, w.length - 1)))
{
this.relativeWidth = parseInt(w.substr(0, w.length - 1)) / 100;
// Relative widths with more than 100% are not allowed!
if (this.relativeWidth > 1)
{
this.relativeWidth = false;
}
}
else if (w.substr(w.length - 2, 2) == "px" && !isNaN(w.substr(0, w.length - 2)))
{
this.fixedWidth = parseInt(w.substr(0, w.length - 2));
}
},
set_visibility: function(_value) {
// If visibility is always, don't turn it off
if(this.visibility == ET2_COL_VISIBILITY_ALWAYS || this.visibility == ET2_COL_VISIBILITY_ALWAYS_NOSELECT) return;
if(_value === true)
{
this.visibility = ET2_COL_VISIBILITY_VISIBLE;
}
else if (_value === false)
{
this.visibility = ET2_COL_VISIBILITY_INVISIBLE;
}
else if (typeof _value == "number")
{
this.visibility = _value;
}
else
{
this.egw().debug("warn", "Invalid visibility option for column: ", _value);
}
}
});
/**
* Contains logic for the columns class. The columns class represents the unique set
* of columns a grid view owns. The parameters of the columns (except for visibility)
* do normaly not change.
*/
var et2_dataview_columns = Class.extend({
init: function(_columnData) {
// Initialize some variables
this.totalWidth = 0;
this.columnWidths = [];
// Create the columns object
this.columns = new Array(_columnData.length);
for (var i = 0; i < _columnData.length; i++)
{
this.columns[i] = new et2_dataview_column(_columnData[i]);
}
this.updated = true;
},
destroy: function() {
// Free all column objects
for (var i = 0; i < this.columns.length; i++)
{
this.columns[i].free();
}
},
/**
* Set the total width of the header row
*/
setTotalWidth: function(_width) {
if (_width != this.totalWidth && _width > 0)
{
this.totalWidth = _width;
this.updated = true;
}
},
/**
* Returns the index of the colum with the given id
*/
getColumnIndexById: function(_id) {
for (var i = 0; i < this.columns.length; i++)
{
if (this.columns[i].id == _id)
{
return i;
}
}
return -1;
},
/**
* Returns the column with the given id
*/
getColumnById: function(_id) {
var idx = this.getColumnIndexById(_id);
return (idx == -1) ? null : this.columns[idx];
},
/**
* Returns the width of the column with the given index
*/
getColumnWidth: function(_idx) {
if (this.totalWidth > 0 && _idx >= 0 && _idx < this.columns.length)
{
// Recalculate the column widths if something has changed.
if (this.updated)
{
this._calculateWidths();
this.updated = false;
}
// Return the calculated width for the column with the given index.
return this.columnWidths[_idx];
}
return 0;
},
/**
* Returns an array containing the width of the column and its visibility
* state.
*/
getColumnData: function() {
var result = [];
for (var i = 0; i < this.columns.length; i++)
{
result.push({
"id": this.columns[i].id,
"width": this.getColumnWidth(i),
"visible": this.columns[i].visibility != ET2_COL_VISIBILITY_INVISIBLE
});
}
return result;
},
/**
* Returns an associative array which contains data about the visibility
* state of the columns.
*/
getColumnVisibilitySet: function() {
var result = {};
for (var i = 0; i < this.columns.length; i++)
{
if (this.columns[i].visibility != ET2_COL_VISIBILITY_ALWAYS_NOSELECT)
{
result[this.columns[i].id] = {
"caption": this.columns[i].caption,
"enabled": (this.columns[i].visibility != ET2_COL_VISIBILITY_ALWAYS) &&
(this.columns[i].type != ET2_COL_TYPE_NAME_ICON_FIXED),
"visible": this.columns[i].visibility != ET2_COL_VISIBILITY_INVISIBLE
};
}
}
return result;
},
/**
* Sets a column visiblity set
*/
setColumnVisibilitySet: function(_set) {
for (var k in _set)
{
var col = this.getColumnById(k);
if (col)
{
col.set_visibility(_set[k].visible ? ET2_COL_VISIBILITY_VISIBLE :
ET2_COL_VISIBILITY_INVISIBLE);
}
}
this.updated = true;
},
/* ---- PRIVATE FUNCTIONS ---- */
/**
* Calculates the absolute column width depending on the previously set
* "totalWidth" value. The calculated values are stored in the columnWidths
* array.
*/
_calculateWidths: function()
{
// Reset some values which are used during the calculation
for (var i = 0; i < this.columns.length; i++)
{
this.columns[i]._larger = false;
this.columns[i]._newWidth = false;
}
// Remove the spacing between the columns from the total width
var tw = this.totalWidth;
// Calculate how many space is - relatively - not occupied with columns with
// relative or fixed width
var remRelWidth = 1;
var noWidthCount = 0;
for (var i = 0; i < this.columns.length; i++)
{
var col = this.columns[i];
if (col.visibility != ET2_COL_VISIBILITY_INVISIBLE)
{
if (col.relativeWidth)
{
remRelWidth -= col.relativeWidth;
}
else if (col.fixedWidth)
{
remRelWidth -= col.fixedWidth / tw;
}
else
{
noWidthCount++;
}
}
}
// Check whether the width of columns with relative width is larger than their
// maxWidth
var done;
do
{
done = true;
var noWidth = remRelWidth / noWidthCount;
for (var i = 0; i < this.columns.length; i++)
{
var col = this.columns[i];
if (col.visibility != ET2_COL_VISIBILITY_INVISIBLE)
{
if (col.maxWidth && !col._larger)
{
if (col.relativeWidth)
{
var w = col.relativeWidth * tw;
col._larger = w > col.maxWidth;
if (col._larger)
{
// Recalculate the remaining relative width:
// col.maxWidth / w is the relative amount of space p which
// is remaining for the element. E.g. an element with
// w = 150px and maxWidth = 100px => p = 2/3
// The space which got removed is 1 - p => 1/3
// ==> we have to add 1/3 * oldRelWidth to the remRelWidth
// variable.
remRelWidth += col.relativeWidth * (1 - col.maxWidth / w);
done = false;
break;
}
}
else
{
col._larger = noWidth * tw > col.maxWidth;
if (col._larger)
{
remRelWidth -= col.maxWidth / tw;
noWidthCount--;
done = false;
break;
}
}
}
}
}
// As some columns take their max width, new space might come available, which
// requires other columns to take their maximum width.
} while (!done);
// Check whether the columns where a relative width is specified have more
// space than the remaining columns - if yes, make the relative ones larger
for (var i = 0; i < this.columns.length; i++)
{
var col = this.columns[i];
if (col.visibility != ET2_COL_VISIBILITY_INVISIBLE)
{
if (col.relativeWidth && !col._larger)
{
if (col.relativeWidth < noWidth)
{
noWidthCount++;
remRelWidth += col.relativeWidth;
col._newWidth = true;
}
else
{
col._newWidth = false;
}
}
}
}
// Now calculate the absolute width of the columns in pixels
this.columnWidths = [];
for (var i = 0; i < this.columns.length; i++)
{
var w = 0;
var col = this.columns[i];
if (col.visibility != ET2_COL_VISIBILITY_INVISIBLE)
{
if (col._larger)
{
w = col.maxWidth;
}
else if (col.fixedWidth)
{
w = col.fixedWidth;
}
else if (col.relativeWidth && !col._newWidth)
{
w = Math.round(tw * col.relativeWidth);
}
else
{
w = Math.round(tw * (remRelWidth / noWidthCount));
}
if (w < 0)
{
w = 0;
}
}
this.columnWidths.push(w);
}
}
});