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
    - "accelerated"
      If this property is set, the spin box will increase/decrease the value faster the longer you press the respective button.
    - "alignment"
      Changes the alignment at the cursor position or the alignment of the selected text.
    - "buttonSymbols"
      Changes the button symbols of the spin-button symbols.
    - "calendarPopup"
      This attribute defines if the calender shall be displayed in a pop-up.
    - "contextMenuPolicy"
      Defines how the respective widgets shows the context menu.
    - "correctionMode"
      This attribute defines how a wrong respective an intermediate value shall be corrected.
    - "currentSection"
      This attribute holds the current section of the DateTimeEdit Widget.
    - "currentSectionIndex"
      This attribute holds the index of the DateTimeEdit widget's current section.
    - "date", "dateTime"
      These attributes allow to set and query date and time.
    - "displayedSections"
      This attribute holds the currently displayed sections.
    - "displayFormat"
      This attribute allows to define the format in which time and date are shown.
    - "font"
      Sets the font of an object.
    - "frame"
      Defines if a frame is shown around the widget.
    - "layoutDirection"
      Defines the widget's layout direction.
    - maximumDate"
      Defines the maximum selectable date for the Calendar / DateTimeEdit widget.
    - "maximumDateTime"
      Defines the maximum selectable date and time for the Calendar / DateTimeEdit widget.
    - "minimumDate"
      Defines the minimum selectable date for the Calendar / DateTimeEdit widget.
    - "minimumDateTime"
      Defines the minimum selectable date and time for the Calendar / DateTimeEdit widget.
    - "readOnly"
      Sets the scheduler ewo to read only (TRUE) or not to read only (FALSE).
    - "sectionCount"
      This attribute holds the number of displayed sections.
    - "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.
    - "wrapping"
      Locks the possibility to jump from minimum value to maximum value or from maximum value to minimum value.
  - 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
  - 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.

"readOnly"

Sets the scheduler ewo to read only (TRUE) or not to read only (FALSE).

Synopsis

shape.readOnly(bool);

Parameters


Parameter	Description
bool	TRUE = read-only FALSE = not read-only

Description

Sets the scheduler ewo to read only (TRUE) or not to read only (FALSE).

Assignment

Scheduler ewo