dl-breadcrumbs__homedl-breadcrumb-item__separatorConfiguration and programmingdl-breadcrumb-item__separatorProgramming with CODESYSdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorCODESYS Visualizationdl-breadcrumb-item__separatorDisplaying and Editing Text Files dl-breadcrumb-item__separatorConfiguring the display of a text file
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Configuring the display of a text file dl-permalink__symbolPermalink

To display a text file located on the controller, you need controls for selecting, opening, and closing the file in addition to the “Text Editor” element. As an option, additional controls can also be used to set up a text search in the file.

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Configuring the “Text Editor” element, example

  1. Drag a “Text Editor” element to the visualization editor.

  2. For example, declare the control variables for the element as global variables in the ‎GVL‎ object.

    For more information, see the declaration of the control variables.

  3. For the “Text Editor”, configure the “Editor Mode” property with “Read Only”.

  4. Continue configuring the “Control variables” property.

    Assign the following variables there:

    • “Control variables  File  Variable”: ‎g_sFileName‎

    • “Control variables  File  Open”: ‎g_bFileOpen‎

    • “Control variables  File  Close”: ‎g_bFileClose‎

    • “Control variables  File  New  Variable”: ‎g_bFileNew‎

    • “Control variables  File  Save  Variable”: ‎g_bFileSave‎

    • “Control variables  Edit  Variable”: ‎g_sEditSearchFor‎

    • “Control variables  Edit  Find”: ‎g_bEditFind‎

    • “Control variables  Edit  Find Next”: ‎g_bEditFindNext‎

Declaration of control variables 

VAR_GLOBAL
    g_sFileName: STRING := 'Readme.txt';
    g_bFileOpen : BOOL;
    g_bFileClose: BOOL;
    g_bFileNew: BOOL;
    g_bFileSave: BOOL;
    g_sEditSearchFor : STRING;
    g_bEditFind : BOOL;
    g_bEditFindNext : BOOL;
    g_usiErrorHandlingVarForErrorCode: USINT;
    g_bVarForContentChanged : BOOL;
    g_bVarForReadWriteMode: BOOL;
END_VAR

Configuring control elements for file selection

  1. Add a “Label” element.

  2. Configure the “Texts  Text” property with ‎File‎.

  3. Next to it, add a “Rectangle” element where the user can then enter the file name:

  4. Configure the “Texts  Text” property with ‎%s‎.

  5. Configure the “Texts  Text variable” property with ‎g_sFileName‎.

  6. Configure the “Input configuration  OnMouseclick” property with “Write Variable”.

    In the “Input configuration” dialog, select “Input type” as the “Text input”.

    Select the “Use text output variable” option.

    The box to input the file name is configured.

  7. Add a “Button” property for opening the file.

  8. Configure the “Texts  Text” property with ‎Open‎.

  9. Configure the “Input configuration  OnMouseclick” property with “Switch Variable”.

    Assign ‎g_bFileOpen‎ as the variable.

    The ‎Open‎ button is configured.

  10. Add another “Button” button for closing the file.

  11. Configure the “Texts  Text” property with ‎Close‎.

  12. Configure the “Input configuration  OnMouseclick” property with “Switch Variable”.

    Assign ‎g_bEditFile‎ as the variable.

    The ‎Close‎ button is configured.

Controls for searching for a text

  1. Add a “Label” element.

  2. Configure the “Texts  Text” property with ‎Text‎.

  3. Next to it, add a “Rectangle” element for entering the text to be searched for.

  4. Configure the “Texts  Text” property with ‎%s‎.

  5. Configure the “Texts  Text variable” property with ‎g_sEditSearchFor‎.

  6. Configure the “Input configuration  OnMouseclick” property with “Write Variable”.

    In the “Input configuration” dialog, select “Input type” as the “Text input”.

    Select the “Use text output variable” option.

    The rectangle is configured.

  7. Add a “Button” property for starting the search.

  8. Configure its “Texts  Text” property with ‎Find‎.

  9. Configure the “Input configuration  OnMouseclick” property with “Switch Variable”.

    Assign ‎g_bEditFind‎ as the variable.

  10. Also add the “Execute ST code” action.

    Program the action with: ‎g_bEditFindNext := FALSE;‎

    The button is configured.

  11. Add another “Button” element.

  12. Configure the “Texts  Text” property with ‎Find Next‎.

  13. Configure the “Input configuration  OnMouseclick” property with “Switch Variable”.

    Assign ‎g_bEditFind‎ as the variable.

  14. Also add the “Execute ST code” action.

    Program: ‎g_bEditFindNext := TRUE;‎

    The button is configured.