CONTROL
- Introduction to CTRL
  An introduction to the product's own programming language Control(CTRL).
- CONTROL Classes
- Types of Control Functions
  An overview of the types of functions distinguished within Control.
- Control graphics
  - Graphics objects
  - Attributes of graphics objects
  - Arc
  - AttentionEffect EWO functions
  - Bar trend
  - BarChart3D EWO
  - Button
  - Calendar
  - Cascade
  - Chart.ewo
  - Checkbox
  - Clock
  - Combobox
  - DateTimeEdit EWO functions
  - DialGauge EWO
  - DoubleSpinbox EWO
  - DpTreeView
  - DpTypeView
  - Embedded module
  - Frame
  - GIS Viewer EWO
    WinCC OA GIS Viewer provides the cartographic representation of objects in WinCC OA. This new feature provides numerous advantages, particularly in geographical distributed systems, like in Water, Traffic, Oil & Gas or Energy.
  - Label Functions
  - Layoutgroup functions
  - LCD number
  - Maps Widget - Properties and Functions
  - Panel functions
  - PDF Viewer EWO
  - PictureFlow EWO functions
    - "acceptDrops"
      Specifies whether drop events are enabled for this object.
    - "addSlide"
      Adds a new slide with a picture to the PictureFlow EWO.
    - "centerIndex"
      Defines the slide which shall be used as main slide.
    - "clear"
      Deletes the items of a tree widget.
    - "dragEnabled","dropEnabled"
      With the aid of these functions you can query whether the Drag and Drop was enabled for the elements of the tree widget. See also "setDragEnabled", "setDropEnabled".
    - "font"
      Sets the font of an object.
    - "isActiveWindow"
      The attribute "isActiveWindow"; returns TRUE if this widget is the active window, otherwise FALSE.
    - "layoutDirection"
      Defines the widget's layout direction.
    - "setSlide"
      Allows to change the image of an existing slide.
    - "showSlide"
      Goes to the slide with the specified index using an animation.
    - "slideBackgroundColor"
      Defines the background color for the slides of the PictureFlow EWO.
    - "slideCount"
      This property holds the number of slides of the PictureFlow EWOs.
    - "slideSize"
      Defines the size of a slide.
    - "tooltipDuration"
      Specifies how long a tooltip is shown.
    - "updatesEnabled"
      This attribute specifies whether updates of a widget (for example, a textEdit, slider, progress bar, zoom navigator, LCD number or thumb wheel) have been enabled.
    - "userData"
      Saves/Returns a user-specific text for an item.
    - "x", "y"
      The attributes x and y return the coordinate of an object (e.g. a textEdit, a progress bar, a slider, a zoom navigator, an LCD number or a thumb wheel). x returns the X coordinate of an object. y returns the Y coordinate of an object.
  - Pipe
  - Polyline
  - Primitive text
  - Progress bar
  - Radio box
  - Rectangle
  - Reference Functions
  - Scheduler.ewo
  - Selection list
  - Slider
  - Spin button
  - Splitter
  - Tab
  - Table
    The available functions of the Table object.
  - TextEdit
  - Text field
  - Thumb wheel
  - ToggleSwitch EWO
  - Tree widget
  - Trend Functions
  - WebView EWO
    All events and functions, specifically available for the WebView EWO.
  - Zoom Navigator
    Functions available for the Zoom Navigator widget.
- CONTROL Functions
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.
- CtrlExtension
  The CtrlExtension allows the addition of custom C++ code.

"centerIndex"

Defines the slide which shall be used as main slide.

Synopsis

shape.centerIndex(int index);

Parameter


Parameter	Description
shape	Name of the object
index	Index of the slide (starting from 0)

Description

Defines the slide which shall be used as main slide.

Assignment

PictureFlow EWO