How to Use Tab Methods in TOM

The following example provides C functions that illustrate the use of the tab methods in the Text Object Model (TOM). It is assumed that most applications include a toolbar that shows the current position and type of the tabs for the currently selected paragraph.

What you need to know

Technologies

Prerequisites

  • C/C++
  • Windows User Interface Programming

Instructions

Use a Tab Method

The following code example demonstrates how to update a toolbar with the current tab details.


HRESULT UpdateToolbar(ITextSelection *pSel)
{
    HRESULT hr       = S_OK;        
    ITextPara *pPara = 0;
    
    float f;
    long tbt;            // tab type
    long tbp;

    hr = pSel->GetPara(&pPara);
    
    if (FAILED(hr))
        goto cleanup;    // Paragraph properties are not supported
    
    f = (float) -1.0;    // Start at beginning
    
    while (pPara->GetTab(tbgoNext, &f, &tbt, NULL) == S_OK)
    {
            // Do something like draw tab icon on toolbar here
            // DrawTabPicture(f, tbt);
    }
    
cleanup:

    if (pPara)
        pPara->Release();
        
    return hr;
    
}

Copy Tab Information

The following example shows how to copy only the tab information from one ITextPara interface to another. It takes two parameters: ITextPara * pParaFrom (the paragraph from which to copy tabs) and ITextPara * pParaFrom (the paragraph to which to copy tabs).


HRESULT CopyOnlyTabs(ITextPara *pParaFrom, ITextPara *pParaTo)
{
    float f;
    short tbt;
    short style;
     
    pParaTo->ClearAllTabs();
    
    f = (float) -1.0;
    
    while (pParaFrom->GetTab(tbgoNext, &f, &tbt, &style) == S_OK)
        pParaTo->AddTab(f, tbt, style);
        
    return S_OK;                
    
}

Related topics

Using The Text Object Model
Using Rich Edit Controls
Windows common controls demo (CppWindowsCommonControls)

 

 

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