CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- Control graphics
  - Graphics objects
  - Attributes of graphics objects
  - Panel functions
    - "ancestorPanel"
      This attribute is used for child panels and returns a pointer to the panel which opened it.
    - "connectorPoints"
      Maps all connector points within the panel.
    - "childPanels"
      The property "childPanels" returns the childpanels of the current panel.
    - "groups"
      Write all shape-groups within a panel to a variable.
    - "horizontalSizePolicy", "verticalSizePolicy"
      Allows to read/write the size policy of ashape, panel, shape group or panel reference..
    - "imageToClipboard"
    - "imageToFile"
      Saves an image of a graphics object (screenshot).
    - "initAllShapes"
      Allows to trigger the initialize scripts for all of the panel's shapes.
    - "keepInMemory"
      This attribute allows to set whether the panel shall be kept in memory after closing it.
    - "layerVisible"
      Sets the visibility of a panel layer.
    - "layoutEnabled"
      This attribute allows to enable/disable layout management for a panel.
    - "layoutMinimumSize"
      Returns the minimum layout size that is required to display the panel content.
    - "minimumSize","maximumSize"
      Allows to define the minimum / maximum size of a shape
    - "moduleName"
      Returns the name of the current module in which the panel is opened.
    - "panel"
      Returns the panel on which the graphics object is placed.
    - "panelFileName"
      Returns or writes the panel name of a reference in a panel.
    - "parentPanel"
      Returns a pointer to the parent panel of the current panel.
    - "parentShape"
      Returns a pointer to the shape of the embedded module if the current panel is within an embedded module.
    - "rootPanel"
      Returns a pointer to the root panel of the current panel.
    - "script"
      Gets or sets the event script of a shape.
    - "selection"
      Get/ Set property for the shapes or groups selected within a panel.
    - "shapes"
      Writes pointers to all shapes within a panel to a variable.
    - "styleSheet"
      Allows to define a custom style for separate widgets or panels to individually adapt them. These styles override the general stylesheet settings.
    - "type"
      This attribute allows to define a type name for the panel.
    - "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.
    - "windowFlags"
      Allows to set specific flags that define the behavior of the panel.
    - "windowFrameGeometry"
      This attribute holds the geometry of the window including the window frame.
    - "windowGeometry"
      This attribute holds the geometry of the window excluding the window frame.
    - "windowOpacity"
      This property allows to define the opacity of the complete top level window (module or child panel).
    - "windowState"
      This attribute allows to set the window state.
    - "windowVisible"
      This attribute allows to get or set the visibility of the panel.
    - "writeToFile"
      This attribute allows to save a panel.
    - "zoomFactor"
      This read only attribute returns the current zoom factor.
  - Reference Functions
  - Arc
  - AttentionEffect EWO functions
  - Bar trend
  - BarChart3D EWO
  - Button
  - Chart.ewo
  - Calendar
  - Cascade
  - 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
  - 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
  - TextEdit
  - Text field
  - Thumb wheel
  - ToggleSwitch EWO
  - Tree widget
  - Trend
  - 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, basics
- CTRLPPCheck
  Save time and money with increased code quality in your projects

"keepInMemory"

This attribute allows to set whether the panel shall be kept in memory after closing it.

Synopsis

this.keepInMemory(bool enabled);

Parameter


Parameter	Description
enabled	TRUE: Panel is kept in memory (default) FALSE: Panel is not kept in memory

Description

This attribute allows to set whether the panel shall be kept in the random access memory after closing it. Since panels are stored by default, you can reduce the memory usage by setting this attribute to FALSE.

If you use references in a panel with default setting "keepInMemory" and you change the reference, you have to restart the UI to apply the changes.

Assignment

Panel