Objective Grid: User Attributes

Article ID: 42
Last updated: 16 Apr, 2018
Article ID: 42
Last updated: 16 Apr, 2018
Revision: 4
Views: 1830
Posted: 24 Jan, 2001
by Meltreger B.
Updated: 16 Apr, 2018
by Meltreger B.

Problem


What is a User Attribute?
 


Cause



Action


User Attributes help you store information in cells that can be interpreted by custom cell types. Suppose you implement a new cell type, CMyEditControl, that underlines the text when the value in the cell is greater than a given number. The number can be different for individual cells.

This number is a good example for using user attributes. If you register a new user attribute with the ID IDS_UA_COMPARENUMBER, you can apply this user attribute to individual cells with SetStyleRange() and SetUserAttribute().  In CMyEditControl, you can read this attribute with GetUserAttribute().

Example:

  1. Apply number to individual cells

  2.  
    SetStyleRange(CGXRange(nRow, 1),
    CGXStyle()
    .SetControl(IDS_CTRL_MYEDIT)
    .SetUserAttribute(IDS_UA_COMPARENUMBER, 100)
    );
    SetStyleRange(CGXRange(nRow, 2), 
    CGXStyle()
    .SetControl(IDS_CTRL_MYEDIT)
    .SetUserAttribute(IDS_UA_COMPARENUMBER, 200)
    );
  3. In CMyEditControl you can read this user attribute:

  4.  
    // read number
    double number = atof(m_pStyle->GetUserAttribute(IDS_UA_COMPARENUMBER));

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Article ID: 42
Last updated: 16 Apr, 2018
Revision: 4
Views: 1830
Posted: 24 Jan, 2001 by Meltreger B.
Updated: 16 Apr, 2018 by Meltreger B.

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