uiui元素简介将数据放在屏幕上下文绑定使用控制.pdf

UI Elements Contents: ⚫ Introduction to UI elements ⚫ Putting data on the screen: Context binding ⚫ Controlling the behaviour of UI elements using context binding ⚫ Using a basic composite UI element What is a UI element? A UI element is any graphical entity that occupies a position within a view layout. Group UI Element TextView UI Element Label UI Element InputField UI Element How are UI elements arranged? All view layouts are composed from a hierarchy of UI elements. The root node is always of type TransparentContainer, and is always called RootUIElementContainer. You cannot change this, it is hard coded! Hard coded RootUIElementContainer UI Element categories Various categories of UI elements are supported e.g. Button, InputField, Gantt work Label In ctiveForm BusinessGraphics, GeoMap e.g. DateNavigator, Table, Tree BI Application Frame OfficeControl e.g. TransparentContainer, MessageArea Tray Each UI element object is represented as an class that is t of any presentation layer. Using the View Editor 1. Choose Change from the context of a view View Editor 2. The Layout view 3a. UI elements can be added by will be