Fast Layered Creation Example of the Drop-down Tree Widget

Version

Function Description

Fast layered creation is actually a simplified version of the ordinary layered creation of the drop-down tree widget. You only need to define a dataset and can achieve the effect of the dynamic query in the ordinary layered drop-down tree through the dependent layers and dependent fields. Preview effect after fast layered creation:

The following example uses three columns of data (state, area, and city) to create a drop-down tree through fast layered creation.

Dataset Definition

You only need to define a dataset that contains all the required fields.

Add a built-in dataset and enter the three columns of data: state, area, and city, as shown in the following figure.

Drop-down Tree Definition

On the parameter panel, select the drop-down tree widget, drag it to the parameter panel, choose Attribute > Advanced, and click the  icon next to Data Dictionary. In the pop-up Tree Creation window, set Creation Method to Fast Layered Creation, set Actual Value, Display Value, Dependent Layer, and Dependent Field for each layer. In this way, the drop-down tree is created. The following figure shows the operations.

Note:

When using fast layered creation, you must set Dependent Layer, and Dependent Field for each layer.

(1) Gradation1

(2) Gradation2

(3) Gradation3

Effect Display

Click Pagination Preview, and you can see the drop-down tree widget on the parameter panel. The effect on PCs is shown in the section "Function Description."

The following figure shows the effect on the DataAnalyst app and HTML5 terminals.