Aspose::Words::Fields::FormField::Accept method

FormField::Accept method

Accepts a visitor.

bool Aspose::Words::Fields::FormField::Accept(System::SharedPtr<Aspose::Words::DocumentVisitor> visitor) override

Parameter	Type	Description
visitor	System::SharedPtr<Aspose::Words::DocumentVisitor>	The visitor that will visit the node.

ReturnValue

false if the visitor requested the enumeration to stop.

Remarks

Calls VisitFormField().

For more info see the Visitor design pattern.

Examples

Shows how insert different kinds of form fields into a document, and process them with using a document visitor implementation.

void Visitor()
{
    auto doc = MakeObject<Document>();
    auto builder = MakeObject<DocumentBuilder>(doc);

    // Use a document builder to insert a combo box.
    builder->Write(u"Choose a value from this combo box: ");
    SharedPtr<FormField> comboBox = builder->InsertComboBox(u"MyComboBox", MakeArray<String>({u"One", u"Two", u"Three"}), 0);
    comboBox->set_CalculateOnExit(true);
    ASSERT_EQ(3, comboBox->get_DropDownItems()->get_Count());
    ASSERT_EQ(0, comboBox->get_DropDownSelectedIndex());
    ASSERT_TRUE(comboBox->get_Enabled());

    builder->InsertBreak(BreakType::ParagraphBreak);

    // Use a document builder to insert a check box.
    builder->Write(u"Click this check box to tick/untick it: ");
    SharedPtr<FormField> checkBox = builder->InsertCheckBox(u"MyCheckBox", false, 50);
    checkBox->set_IsCheckBoxExactSize(true);
    checkBox->set_HelpText(u"Right click to check this box");
    checkBox->set_OwnHelp(true);
    checkBox->set_StatusText(u"Checkbox status text");
    checkBox->set_OwnStatus(true);
    ASPOSE_ASSERT_EQ(50.0, checkBox->get_CheckBoxSize());
    ASSERT_FALSE(checkBox->get_Checked());
    ASSERT_FALSE(checkBox->get_Default());

    builder->InsertBreak(BreakType::ParagraphBreak);

    // Use a document builder to insert text input form field.
    builder->Write(u"Enter text here: ");
    SharedPtr<FormField> textInput = builder->InsertTextInput(u"MyTextInput", TextFormFieldType::Regular, u"", u"Placeholder text", 50);
    textInput->set_EntryMacro(u"EntryMacro");
    textInput->set_ExitMacro(u"ExitMacro");
    textInput->set_TextInputDefault(u"Regular");
    textInput->set_TextInputFormat(u"FIRST CAPITAL");
    textInput->SetTextInputValue(System::ObjectExt::Box<String>(u"New placeholder text"));
    ASSERT_EQ(TextFormFieldType::Regular, textInput->get_TextInputType());
    ASSERT_EQ(50, textInput->get_MaxLength());

    // This collection contains all our form fields.
    SharedPtr<FormFieldCollection> formFields = doc->get_Range()->get_FormFields();
    ASSERT_EQ(3, formFields->get_Count());

    // Fields display our form fields. We can see their field codes by opening this document
    // in Microsoft and pressing Alt + F9. These fields have no switches,
    // and members of the FormField object fully govern their form fields' content.
    ASSERT_EQ(3, doc->get_Range()->get_Fields()->get_Count());
    ASSERT_EQ(u" FORMDROPDOWN \u0001", doc->get_Range()->get_Fields()->idx_get(0)->GetFieldCode());
    ASSERT_EQ(u" FORMCHECKBOX \u0001", doc->get_Range()->get_Fields()->idx_get(1)->GetFieldCode());
    ASSERT_EQ(u" FORMTEXT \u0001", doc->get_Range()->get_Fields()->idx_get(2)->GetFieldCode());

    // Allow each form field to accept a document visitor.
    auto formFieldVisitor = MakeObject<ExFormFields::FormFieldVisitor>();

    {
        SharedPtr<System::Collections::Generic::IEnumerator<SharedPtr<FormField>>> fieldEnumerator = formFields->GetEnumerator();
        while (fieldEnumerator->MoveNext())
        {
            fieldEnumerator->get_Current()->Accept(formFieldVisitor);
        }
    }

    std::cout << formFieldVisitor->GetText() << std::endl;

    doc->UpdateFields();
    doc->Save(ArtifactsDir + u"FormFields.Visitor.html");
}

class FormFieldVisitor : public DocumentVisitor
{
public:
    FormFieldVisitor()
    {
        mBuilder = MakeObject<System::Text::StringBuilder>();
    }

    VisitorAction VisitFormField(SharedPtr<FormField> formField) override
    {
        AppendLine(System::ObjectExt::ToString(formField->get_Type()) + u": \"" + formField->get_Name() + u"\"");
        AppendLine(String(u"\tStatus: ") + (formField->get_Enabled() ? String(u"Enabled") : String(u"Disabled")));
        AppendLine(String(u"\tHelp Text:  ") + formField->get_HelpText());
        AppendLine(String(u"\tEntry macro name: ") + formField->get_EntryMacro());
        AppendLine(String(u"\tExit macro name: ") + formField->get_ExitMacro());

        switch (formField->get_Type())
        {
        case FieldType::FieldFormDropDown:
            AppendLine(String(u"\tDrop-down items count: ") + formField->get_DropDownItems()->get_Count() + u", default selected item index: " +
                       formField->get_DropDownSelectedIndex());
            AppendLine(String(u"\tDrop-down items: ") + String::Join(u", ", formField->get_DropDownItems()->LINQ_ToArray()));
            break;

        case FieldType::FieldFormCheckBox:
            AppendLine(String(u"\tCheckbox size: ") + formField->get_CheckBoxSize());
            AppendLine(String(u"\t") + u"Checkbox is currently: " + (formField->get_Checked() ? String(u"checked, ") : String(u"unchecked, ")) +
                       u"by default: " + (formField->get_Default() ? String(u"checked") : String(u"unchecked")));
            break;

        case FieldType::FieldFormTextInput:
            AppendLine(String(u"\tInput format: ") + formField->get_TextInputFormat());
            AppendLine(String(u"\tCurrent contents: ") + formField->get_Result());
            break;

        default:
            break;
        }

        // Let the visitor continue visiting other nodes.
        return VisitorAction::Continue;
    }

    String GetText()
    {
        return mBuilder->ToString();
    }

private:
    SharedPtr<System::Text::StringBuilder> mBuilder;

    void AppendLine(String text)
    {
        mBuilder->Append(text + u'\n');
    }
};

Aspose::Words::Fields::FormField::Accept method

FormField::Accept method

ReturnValue

Remarks

Examples

See Also