label.htm

网上商城的设计与实现

// ************************************************************************<BR>
// Microsoft Script Library<BR>
// Visual InterDev 6.0 Label Object for DHTML<BR>
// Copyright 1998 Microsoft Corporation. All Rights Reserved.<BR>
// <B>Do not modify in design view. Switch to source view.</B><BR>
// ************************************************************************<BR>
// <SCRIPT>
function CreateLabel(strName,funcInit,objParent)
{
	if (typeof(strName) != 'string' || strName == '')
		return null;

	var strTag = '<SPAN id="' + strName + '" name="' + strName + '"></SPAN>';
	
	if ((typeof(objParent) == 'object') && (objParent != null))
		objParent.insertAdjacentHTML('BeforeEnd',strTag);
	else
		document.write(strTag);

	var objLabel = eval(strName);
	if (typeof(objLabel) != 'object')
		return null;

	objLabel.hide = _LBL_hide;
	objLabel.show = _LBL_show;
	objLabel.isVisible = _LBL_isVisible;
	objLabel.getCaption = _LBL_getCaption;
	objLabel.setCaption = _LBL_setCaption;
	objLabel.getDataFormatAs = _LBL_getDataFormatAs;
	objLabel.setDataFormatAs = _LBL_setDataFormatAs;
	objLabel.getDataSource = _LBL_getDataSource;
	objLabel.setDataSource = _LBL_setDataSource;
	objLabel.getDataField = _LBL_getDataField;
	objLabel.setDataField = _LBL_setDataField;
	objLabel.advise = _LBL_advise;
	objLabel.unadvise = _LBL_unadvise;
	objLabel.display = _LBL_display;

	//private members
	objLabel._objEventManager = null;
	objLabel._objDataSource = null;
	objLabel._strDataField = '';
	objLabel._dataFormatAs = 'text';
	objLabel._fireEvent = _LBL__fireEvent;

	objLabel._fireEvent(funcInit);
	return objLabel;
}

function _LBL_isVisible()
{	return (this.style.visibility != 'hidden');	}

function _LBL_hide()
{	this.style.visibility = 'hidden';	}	

function _LBL_show()
{	this.style.visibility = 'visible';	}	

function _LBL_getCaption()
{
	if (this._dataFormatAs == 'html')
		return this.innerHTML;
	else
		return this.innerText;
}

function _LBL_setCaption(strCaption)
{
	if (this._dataFormatAs == 'html')
		this.innerHTML = strCaption;
	else
		this.innerText = strCaption;
}

function _LBL_getDataFormatAs()
{	return this._dataFormatAs;	}

function _LBL_setDataFormatAs(strValue)
{
	var strFormat = String(strValue);
	strFormat = strFormat.toLowerCase();
	if (strFormat == 'text' || strFormat == 'html')
	{
		var strCaption = this.getCaption();
		this._dataFormatAs = strFormat;
		this.setCaption(strCaption);
		if (this._objDataSource != null && this._strDataField != '')
			this.dataFormatAs = this._dataFormatAs;
		return true;
	}
	return false;
}

function _LBL_getDataSource()
{	return this._objDataSource;	}
	
function _LBL_setDataSource(objDataSource)
{
	if (typeof(objDataSource) != 'object')
		return false;

	if ((this._objDataSource != null) && (this._strDataField != ''))
	{
		if (this._objDataSource.isDHTMLAware())
		{
			this.dataSrc = '';
			this.dataFld = '';
		}
		else
			this._objDataSource.unadvise(this._rowEnterID);
	}
	
	if ((this._objDataSource == null) || (objDataSource != null && this._objDataSource.id != objDataSource.id))
	{
		if (this._objDataSource != null)
			this._objDataSource.unadvise(this._afterOpenID);
			
		this._afterOpenID = objDataSource.advise(RS_ONAFTEROPEN, this.id + '.setDataSource(' + objDataSource.id + ');');		
	}
	
	this._objDataSource = objDataSource;
	if ((objDataSource != null) && (this._strDataField != ''))
	{	
		if (objDataSource.isDHTMLAware())
		{
			this.dataSrc = '#' + objDataSource.getDHTMLDataSourceID();
			this.dataFld = this._strDataField;
			this.dataFormatAs = this._dataFormatAs;
		}	
		else
			this._rowEnterID = objDataSource.advise(RS_ONROWENTER, '_LBL__onrowenter(' + objDataSource.id + ', ' + this.id + ', "' + this._strDataField + '");');
	}		
	return true;
}

function _LBL_getDataField()
{	return this._strDataField;	}	

function _LBL_setDataField(strDataField)
{
	if ((this._objDataSource != null) && (this._strDataField != ''))
	{
		if (this._objDataSource.isDHTMLAware())
		{
			this.dataSrc = '';
			this.dataFld = '';
		}
		else
			this._objDataSource.unadvise(this._rowEnterID);
	}
	this._strDataField = strDataField;
	if ((this._objDataSource != null) && (this._strDataField != ''))
	{	
		if (this._objDataSource.isDHTMLAware())
		{
			this.dataSrc = '#' + this._objDataSource.getDHTMLDataSourceID();
			this.dataFld = strDataField;
			this.dataFormatAs = this._dataFormatAs;
		}
		else
			this._rowEnterID = this._objDataSource.advise(RS_ONROWENTER, '_LBL__onrowenter(' + this._objDataSource.id + ', ' + this.id + ', "' + strDataField + '");');
	}		
	return true;
}

function _LBL_advise(strEvent,funcToCall)
{
	if (this._objEventManager == null)
		this._objEventManager = CreateEventManager();
	var nAdviseID = this._objEventManager.advise(strEvent,funcToCall);
	if (nAdviseID != -1)
		eval('this.' + strEvent + ' = _LBL__fireEvent;');
	return nAdviseID;
}

function _LBL_unadvise(strEvent,nAdviseID)
{
	if (this._objEventManager != null)
		return this._objEventManager.unadvise(strEvent,nAdviseID);
	return false;
}

function _LBL_display()
{	}

function _LBL__fireEvent(funcToFire)
{
	if (typeof(funcToFire) == 'undefined')
	{
		if (this._objEventManager != null)
			this._objEventManager.fireEvent('on' + window.event.type);
	}
	else
		_EM__fireEvent(funcToFire);
}

function _LBL__onrowenter(objRecordset,objLabel,strDataField)
{
	objLabel.setCaption(objRecordset.fields.getValue(strDataField) + '');
}