Manage TextBox

Texts on slides typically exist in text boxes or shapes. Therefore, to add a text to a slide, you have to add a text box and then put some text inside the textbox. Aspose.Slides for C++ provides the IAutoShape interface that allows you to add a shape containing some text.

Info

Aspose.Slides also provides the IShape interface that allows you to add shapes to slides. However, not all shapes added through the IShape interface can hold text. But shapes added through the IAutoShape interface may contain text.

Note

Therefore, when dealing with a shape to which you want to add text, you may want to check and confirm that it was cast through the IAutoShape interface. Only then will you be able to work with TextFrame, which is a property under IAutoShape. See the Update Text section on this page.

Create Text Box on Slide

To create a textbox on a slide, go through these steps:

1. Create an instance of the Presentation class.
2. Obtain a reference for the first slide in the newly created presentation.
3. Add an IAutoShape object with ShapeType set as Rectangle at a specified position on the slide and obtain the reference for the newly added IAutoShape object.
4. Add a TextFrame property to the IAutoShape object that will contain a text. In the example below, we added this text: Aspose TextBox
5. Finally, write the PPTX file through the Presentation object.

This C++ code—an implementation of the steps above—shows you how to add text to a slide:

// Instantiates Presentation
auto pres = System::MakeObject<Presentation>();

// Gets the first slide in the presentation
auto sld = pres->get_Slides()->idx_get(0);

// Adds an AutoShape with type set as Rectangle
auto ashp = sld->get_Shapes()->AddAutoShape(ShapeType::Rectangle, 150.0f, 75.0f, 150.0f, 50.0f);

// Adds TextFrame to the Rectangle
ashp->AddTextFrame(u" ");

// Accesses the text frame
auto txtFrame = ashp->get_TextFrame();

// Creates the Paragraph object for text frame
auto para = txtFrame->get_Paragraphs()->idx_get(0);

// Creates a Portion object for paragraph
auto portion = para->get_Portions()->idx_get(0);

// Sets Text
portion->set_Text(u"Aspose TextBox");

// Saves the presentation to disk
pres->Save(u"TextBox_out.pptx", SaveFormat::Pptx);

Check for Text Box Shape

Aspose.Slides provides the get_IsTextBox() method (from the AutoShape class) to allow you to examine shapes and find text boxes.

This C++ code shows you how to check whether a shape was created as a text box:

auto pres = System::MakeObject<Presentation>(u"pres.pptx");
for (auto&& slide : pres->get_Slides())
{
    for (auto&& shape : slide->get_Shapes())
    {
        auto autoShape = System::DynamicCast_noexcept<Aspose::Slides::AutoShape>(shape);
        if (autoShape != nullptr)
        {
            System::Console::WriteLine(autoShape->get_IsTextBox() ? System::String(u"shape is text box") : System::String(u"shape is not text box"));
        }
    }
}

Add Column In Text Box

Aspose.Slides provides the set_ColumnCount and set_ColumnSpacing methods (from the ITextFrameFormat interface and TextFrameFormat class) that allow you to add columns to textboxes. You get to specify the number of columns in a text box and set the amount spacing in points between columns.

This code in C++ demonstrates the described operation:

auto presentation = System::MakeObject<Presentation>();
// Gets the first slide in the presentation
auto slide = presentation->get_Slides()->idx_get(0);

// Add an AutoShape with type set as Rectangle
auto aShape = slide->get_Shapes()->AddAutoShape(ShapeType::Rectangle, 100.0f, 100.0f, 300.0f, 300.0f);

// Add TextFrame to the Rectangle
aShape->AddTextFrame(String(u"All these columns are limited to be within a single text container -- ") 
    + u"you can add or delete text and the new or remaining text automatically adjusts " 
    + u"itself to flow within the container. You cannot have text flow from one container " 
    + u"to other though -- we told you PowerPoint's column options for text are limited!");

// Gets the text format of TextFrame
auto format = aShape->get_TextFrame()->get_TextFrameFormat();

// Specifies the number of columns in TextFrame
format->set_ColumnCount(3);

// Specifies the spacing between columns
format->set_ColumnSpacing(10);

// Saves the presentation
presentation->Save(u"ColumnCount.pptx", SaveFormat::Pptx);

Add Column In Text Frame

Aspose.Slides for C++ provides the set_ColumnCount method (from the ITextFrameFormat interface) that allows you to add columns in text frames. Through this method, you can specify your preferred number of columns in a text frame.

This C++ code shows you how to add a column inside a text frame:

String outPptxFileName = u"ColumnsTest.pptx";
    
auto pres = System::MakeObject<Presentation>();
auto shape = pres->get_Slides()->idx_get(0)->get_Shapes()->AddAutoShape(ShapeType::Rectangle, 100.0f, 100.0f, 300.0f, 300.0f);
auto format = System::ExplicitCast<TextFrameFormat>(shape->get_TextFrame()->get_TextFrameFormat());

format->set_ColumnCount(2);
shape->get_TextFrame()->set_Text(String(u"All these columns are forced to stay within a single text container -- ") 
    + u"you can add or delete text - and the new or remaining text automatically adjusts " 
    + u"itself to stay within the container. You cannot have text spill over from one container " 
    + u"to other, though -- because PowerPoint's column options for text are limited!");
pres->Save(outPptxFileName, SaveFormat::Pptx);

{
    auto test = System::MakeObject<Presentation>(outPptxFileName);
    auto format1 = System::ExplicitCast<AutoShape>(test->get_Slides()->idx_get(0)->get_Shapes()->idx_get(0))->get_TextFrame()->get_TextFrameFormat();
    CODEPORTING_DEBUG_ASSERT1(2 == format1->get_ColumnCount());
    CODEPORTING_DEBUG_ASSERT1(std::numeric_limits<double>::quiet_NaN() == format1->get_ColumnSpacing());
}

format->set_ColumnSpacing(20);
pres->Save(outPptxFileName, SaveFormat::Pptx);

{
    auto test = System::MakeObject<Presentation>(outPptxFileName);
    auto format2 = System::ExplicitCast<AutoShape>(test->get_Slides()->idx_get(0)->get_Shapes()->idx_get(0))->get_TextFrame()->get_TextFrameFormat();
    CODEPORTING_DEBUG_ASSERT1(2 == format2->get_ColumnCount());
    CODEPORTING_DEBUG_ASSERT1(20 == format2->get_ColumnSpacing());
}

format->set_ColumnCount(3);
format->set_ColumnSpacing(15);
pres->Save(outPptxFileName, SaveFormat::Pptx);

{
    auto test = System::MakeObject<Presentation>(outPptxFileName);
    auto format3 = System::ExplicitCast<AutoShape>(test->get_Slides()->idx_get(0)->get_Shapes()->idx_get(0))->get_TextFrame()->get_TextFrameFormat();
    CODEPORTING_DEBUG_ASSERT1(3 == format3->get_ColumnCount());
    CODEPORTING_DEBUG_ASSERT1(15 == format3->get_ColumnSpacing());
}

Update Text

Aspose.Slides allows you to change or update the text contained in a text box or all the texts contained in a presentation.

This C++ code demonstrates an operation where all the texts in a presentation are updated or changed:

auto pres = System::MakeObject<Presentation>(u"text.pptx");
for (const auto& slide : pres->get_Slides())
{
    for (const auto& shape : slide->get_Shapes())
    {
        if (ObjectExt::Is<IAutoShape>(shape))
        {
            auto autoShape = System::AsCast<IAutoShape>(shape);
            for (const auto& paragraph : autoShape->get_TextFrame()->get_Paragraphs())
            {
                for (const auto& portion : paragraph->get_Portions())
                {
                    //Changes text
                    portion->set_Text(portion->get_Text().Replace(u"years", u"months"));
                    //Changes formatting
                    portion->get_PortionFormat()->set_FontBold(NullableBool::True);
                }
            }
        }
    }
}

//Saves modified presentation
pres->Save(u"text-changed.pptx", SaveFormat::Pptx);

Add Text Box with Hyperlink

You can insert a link inside a text box. When the text box is clicked, users are directed to open the link.

To add a text box containing a link, go through these steps:

1. Create an instance of the Presentation class.
2. Obtain a reference for the first slide in the newly created presentation.
3. Add an AutoShape object with ShapeType set as Rectangle at a specified position on the slide and obtain a reference of the newly added AutoShape object.
4. Add a TextFrame to the AutoShape object that contains Aspose TextBox as its default text.
5. Instantiate the IHyperlinkManager class.
6. Assign the IHyperlinkManager object to the set_HyperlinkClick method associated with your preferred portion of the TextFrame.
7. Finally, write the PPTX file through the Presentation object.

This C++ code—an implementation of the steps above—shows you how to add a text box with a hyperlink to a slide:

// Instantiates a Presentation class that represents a PPTX
auto presentation = System::MakeObject<Presentation>();

// Gets the first slide in the presentation
auto slide = presentation->get_Slides()->idx_get(0);

// Adds an AutoShape object with type set as Rectangle
auto shape = slide->get_Shapes()->AddAutoShape(ShapeType::Rectangle, 150.0f, 150.0f, 150.0f, 50.0f);

// Casts the shape to AutoShape
auto autoShape = System::ExplicitCast<IAutoShape>(shape);

// Accesses the ITextFrame property associated with the AutoShape
autoShape->AddTextFrame(u"");

auto textFrame = autoShape->get_TextFrame();

// Adds some text to the frame
textFrame->get_Paragraphs()->idx_get(0)->get_Portions()->idx_get(0)->set_Text(u"Aspose.Slides");

// Sets the Hyperlink for the portion text
auto linkManager = textFrame->get_Paragraphs()->idx_get(0)->get_Portions()->idx_get(0)->get_PortionFormat()->get_HyperlinkManager();
linkManager->SetExternalHyperlinkClick(u"http://www.aspose.com");

// Saves the PPTX Presentation
presentation->Save(u"hLinkPPTX_out.pptx", SaveFormat::Pptx);