Combo Box

This widget allows you to use a combo box in your Frontend. It can be connected to a tool parameter of your MERLIC Vision App to display the value list of the respective parameter. This enables you to set the value of a connected parameter directly in the Frontend.

Alternatively you can define your own extended list of values for the connected tool parameter. However, if you have also selected a tool parameter or result at the property "Connected Parameter", it will have precedence over your specified values. Thus your values are disabled.

Style

X, Y:

Adjust the position of the widget by typing the desired coordinate values of the upper left corner into the input field.

Z-Order:

Adjust the z-order of the widget by typing the desired value into the input field. This defines which widget is displayed on top if several widgets are positioned at the same place, for example, if widget "A" has "Z-Order" "0" and widget "B" has "Z-Order" "1", widget "B" will be displayed on top of widget "A".

Width:

Adjust the width of the widget. The width is defined in pixels and set to 180 by default. To change the value, type the new width into the input field. It must be at least 80 and not be bigger than 2147483647.

Height:

Adjust the height of the widget. The height is defined in pixels and set to 50 by default. To change the value, type the new height into the input field. It must be at least 40 and not be bigger than 2147483647.

Background Color:

Adjust the background color of the widget. To change the color, click into the color field and select a new color in the color selection dialog or enter the color code manually.

Font Size:

Adjust the size of the displayed font. Select the font size from the combo box or type the value directly into the input field.

Font Color:

Adjust the color of the displayed values. To change the color, click into the color field and select a new color in the color selection dialog or enter the color code manually.

Font Family:

Select the font family of the displayed text in the drop-down menu of this property.

Horizontal Text Alignment:

Adjust the horizontal alignment of the values that are displayed in the widget. It is set to "left" by default. You can also select "center" and "right" for the alignment at the drop-down menu.

Number of Decimal Places:

Define the number of decimal places that are displayed in case the widget is connected to a tool parameter with decimal values. It is set to 4 by default. You can change the number to a value from 0 to 8.

Read Only:

Define if new values can be added to the combo box in the Frontend. By default, the user is not allowed to add new values in the Frontend. If you want to allow that new values are added to the list in the combo box, select "false" in the drop-down menu.

Data

Values:

Define a customized list of parameter values to be displayed in the combo box. Click on the "Edit..." button and enter the values in the new dialog. If a list of individual values is defined, the combo box ignores the parameters of a connected tool and displays only the defined value list.

The chapter Adjusting Your Widgets contains a detailed description how to define customized values for a tool parameter that is connected to a widget.

Connected Tool:

Connect to a tool from your MERLIC Vision App by selecting the desired tool from the drop-down menu. You can only select tools that are used in your MERLIC Vision App. At the property "Connected Parameter" you may then select the parameter whose value you want to display in the widget.

Connected Parameter:

Select the parameter of the connected tool whose value you want to display from the drop-down menu. The list shows only the parameters of the tool that is selected in the property "Connected Tool". Therefore, you have to make sure that the widget is connected to a tool before selecting a parameter.

Application Example

This widget is used in the following MERLIC Vision App examples:

• demonstrate_evaluate_expression.mvapp
• detect_anomalies_of_bottles_in_the_global_context.mvapp