Drop-down

About 2 min read

TwDropDown · Category: Basic

Settings

These settings are in the properties panel on the right while the widget is selected. The default value is the value the widget has when it is first added to a page.

Setting	Type	Default	Description
Read Only readOnly	Checkbox	On	When on, the user cannot change the value at runtime.
Needs Confirmation needsConfirmation	Checkbox	Off	Asks for confirmation before the value is written to the Tag.
Process Value processValue	Value (typed)	-1	Main value of the widget, usually bound to a Tag or an expression in Bindings.
Placeholder placeHolder	Text	Select an option	Text shown while no option is selected.
Enable Flashing enableFlashing	Checkbox	Off	Makes the widget blink (an opacity pulse every second). Usually bound to an alarm condition.
Log Button logButton	Checkbox	Off	At runtime shows a chart icon when hovering the widget; clicking it adds the Tags bound to the widget to the log Tag list.

Bindings

In the Bindings (Rules) section of the properties panel, a Tag can be bound to the following properties of this widget with a Direct binding. The binding types (Direct, IntRange, FloatRange, Boolean, Bit) are the same for all widgets; they are described on the Widget Reference page.

title, visible, authorization, x, y, width, height, rotation, class, foregroundColor, backgroundColor, borderColor, borderStyle, borderWidth, borderRadius, borderTopLeftRadius, borderTopRightRadius, enableFlashing, logButton, readOnly, needsConfirmation, processValue, placeHolder, onChange

Common sections

While this widget is selected, the properties panel also shows these common sections: General, Layout, Appearance, Items, Events, Bindings (Rules). These sections are described on the Page Editor page.