Help Center/ Huawei Cloud Astro Zero/ User Guide (Low-Code)/ Frontend Development/ Standard Pages/ Setting Properties of Standard Page Widgets/ Setting Properties of the Input Card Widget
Updated on 2025-08-26 GMT+08:00
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Setting Properties of the Input Card Widget

This widget is used for dialog input and to create frontend dialog pages for foundation models.

Figure 1 Input card widget

Data Binding

For widgets on standard pages, different view models are created to link various data sources to the return values or property values of the widgets, enabling dynamic data effects.
  • Value binding: Value binding is similar to the v-model of the Vue. Bidirectional data binding is created on the widget. Value binding automatically selects the correct method to update the element based on the widget type. In addition, it checks events that cause binding data changes to update data.
    1. In the Data Binding area, click in the value binding area. The Select Model dialog box is displayed.
    2. Click New.
    3. Set Model Name and Source, and click Next.
      Figure 2 Defining a model

      There are four types of models: Custom, Objects, Services, and Events. Each type of model contains parameter definitions and method definitions. Methods are APIs defined on models. In general, these APIs are called in event scripts (such as page loading events and mouse click events) associated with frontend widgets to implement certain logic.

      Table 1 Model types

      Type

      Model Description

      Model Parameter Description

      Model Method Description

      API Calling Method

      Custom

      Models defined by developers.

      Defined by developers. Subnodes can be added.

      Developer-defined method.

      $model.ref("modelName").actionName();

      Objects

      Object models are generated based on the mapping of the object table. For details about the object model, see Objects.

      The system automatically obtains all fields of an object. Developers can select some fields as parameters.

      The system automatically generates four methods: query, save, delete, and count.
      • Query: $model.ref("modelName").query(param);
      • Save: $model.ref("modelName").save();
      • Delete: $model.ref("modelName").delete();
      • Statistics: $model.ref("modelName").count();

      Services

      Service models are generated by mapping backend services. Currently, service models can only be mapped to flows or scripts. For details about the service model, see Flows and Scripts.

      The parameters are mapped to the inputParam and outputParam sections based on the input and output parameters of backend services.

      The run method is automatically generated to execute a flow or a script associated with the model.

      $model.ref("modelName").run();

      Events

      For event models, data binding is created based on fields of a backend event. Model data can be updated based on the web socket.

      Parameters are generated by mapping fields of backend events.

      Directly use.

      Directly use.

      In addition to the methods defined in models, the platform provides the following standard APIs for all models:

      • Obtaining model data: $model.ref("modelName").getData();
      • Setting model data: $model.ref("modelName").setData();
      • Setting model field values: $model.ref("modelName").setValue(key,value);
    4. On the Settings page of the new model, perform the following operations:
      • If Source is set to Custom in the previous step, you need to add customized parameters and types of subnodes.
      • If Source is set to Objects in the previous step, you need to configure the object and fields associated with the model.
      • If Source is set to Services in the previous step, you need to configure the backend service associated with the model. The backend service can be a script, flow, or public API.
      • If Source is set to Events in the previous step, you need to configure the event and event fields associated with the model.
    5. Click Next.

      Generally, you do not need to add a method. If you need to add or modify a method, refer to the method generated by the object and service by default.

    6. Click OK.
  • Property Binding: Binds a property of a container widget, such as hiding, style, and elastic layout, to a specific model field. Once bound, these properties automatically update in sync with the model field's value, functioning in a manner akin to Vue's v-bind directive.
    1. In the Data Binding area, click + next to Property Binding.
    2. Select a property of the container from the Properties drop-down list.
    3. Under Field, click . The model selection page is displayed.
    4. Click New.
    5. Set Model Name and Source, and click Next.
      There are four types of models: Custom, Objects, Services, and Events. Each type of model contains parameter definitions and method definitions. Methods are APIs defined on models. In general, these APIs are called in event scripts (such as page loading events and mouse click events) associated with frontend widgets to implement certain logic. For details, see Table 1.
      Figure 3 Defining a model
    1. On the Settings page of the new model, perform the following operations:
      • If Source is set to Custom in the previous step, you need to add customized parameters and types of subnodes.
      • If Source is set to Objects in the previous step, you need to configure the object and fields associated with the model.
      • If Source is set to Services in the previous step, you need to configure the backend service associated with the model. The backend service can be a script, flow, or public API.
      • If Source is set to Events in the previous step, you need to configure the event and event fields associated with the model.
    2. Click Next.

      Generally, you do not need to add a method. If you need to add or modify a method, refer to the method generated by the object and service by default.

    3. Click OK.

Basic Properties

After basic properties are bound through data, the values of the bound data are used during running.

  • Placeholder: Enter text for the placeholder. Once set, the placeholder content will be displayed in the text box.
  • Max. Character Length: The maximum number of characters that can be entered. Default is 2,000.
  • New Chat: Whether to display the button for creating a chat. This function is enabled by default. Once enabled, the button for creating a chat is displayed.
    Figure 4 Enabling the new chat effect

Common

  • Name: Name of the current widget.
  • Disabled: Whether to disable the widget. This function is disabled by default. Once enabled, the widget is disabled and cannot be operated.
  • Hid: Whether to hide the widget. In this mode, the widget is statically hidden. You can set this property to a Boolean model field. By controlling the value of this field in custom JavaScript code, you can dynamically determine whether to hide the widget. This dynamic setting has the highest priority.

Style

  • Layout: Set the width and height of the widget.
  • Font: Set the font size, style, and color.
  • Background: Set the background color and transparency.
  • Border: Set the border color and width. The unit can be px, em, or %.
  • Shadow: Set the shadow color and style. The units px, em, and % are supported.
  • Advance
    • Style Code: Style code of the widget. After the widget style is set, the style code is automatically displayed in this area. You can also customize the style code to configure the widget in detail. The customized code can be entered in multiple lines and the style parameters are highlighted.
    • Style Class: Name of the CSS style class of the widget, which can be referenced in the CSS code.

Event

Select the input card widget and add an event on the Events tab page.

Figure 5 Adding an event
Table 2 Event description

Event

Description

on-message

This event is triggered when you click the like button. You can obtain the content in the like area using the following script:

// Current widget
const _component = context.$component.current;
// Obtain the content of the current operation area.
const message = _component.getCurrentContent();
console.log(message)

on-new-chat

This event is triggered when you click the button to create a chat.

on-change

This event is triggered when you click the dislike button. You can obtain the content in the dislike area using the following script:

// Current widget
const _component = context.$component.current;
// Obtain the content of the current operation area.
const message = _component.getCurrentContent();
console.log(message)

on-stop

Click the stop button to end the conversation and terminate the connection with a foundation model.

on-focus

This event is triggered when a text box in the widget loses focus.

on-blur

This event is triggered when a text box in the widget loses focus.
Parent Topic: Setting Properties of Standard Page Widgets