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Author: Sas Jacobs | Website: http://www.sasjacobs.com

Creating the dynamic text fields

Next we're going to create text fields so we can enter data for the chart. The user will select the number of text fields to enter, fill them in and then click the Update chart button. The data labels and values will be transferred to the chart.

I added the change handler function drawFields to the combo box in the property inspector. After the user has selected the number of fields to add, the function will generate the input boxes to the right of the chart to allow the data to be entered. The function is shown below and is broken down on the following pages.

function drawFields(component) {
//remove fields
removeTextFields();

//get number of fields
var NumFieldsDraw = component.getSelectedItem().data;

//text format
Tformat = new TextFormat();
Tformat.font = "Verdana";
Tformat.size = 10;

//label format
Lformat = new TextFormat();
Lformat.bold = true;
Lformat.font = "Verdana";
Lformat.size = 10;

//dynamically create text fields
for (var i=0; i < NumFieldsDraw; i++) {
//instanceName,depth,x,y,width,height
this.createTextField("ChartLabel"+i,i,380,90+(i*25),110,20);
this["ChartLabel"+i].text = "Enter Chart Label";
this["ChartLabel"+i].type = "input";
this["ChartLabel"+i].setTextFormat(Lformat);
this["ChartLabel"+i].setNewTextFormat(Lformat);

this.createTextField("ChartValue"+i,100+i,500,90+(i*25),110,20);
this["ChartValue"+i].text = "Enter Chart Value";
this["ChartValue"+i].type = "input";
this["ChartValue"+i].border = true;
this["ChartValue"+i].setTextFormat(Tformat);
this["ChartValue"+i].setNewTextFormat(Tformat);
}
}

The variable NumFieldsDraw is the value of the Data Rows combo box and determines how many text fields will be created. Creating the text fields is explained in more detail on the next page.

» Level Intermediate

Added: 2002-08-05
Rating: 8 Votes: 41
(10 being the highest)
» Author
Applications Developer Marconi Australia
» Download
Download the files used in this tutorial.
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