Add Line Shapes to Presentations in C++

Create a Plain Line

To add a simple plain line to a selected slide of the presentation, please follow the steps below:

• Create an instance of Presentation class.
• Obtain the reference of a slide by using its Index.
• Add an AutoShape of Line type using AddAutoShape method exposed by Shapes object.
• Write the modified presentation as a PPTX file.

In the example given below, we have added a line to the first slide of the presentation.

Create an Arrow-Shaped Line

Aspose.Slides for C++ also allows developers to configure some properties of the line to make it look more appealing. Let’s try to configure few properties of a line to make it look like an arrow. Please follow the steps below to do so:

• Create an instance of Presentation class.
• Obtain the reference of a slide by using its Index.
• Add an AutoShape of Line type using AddAutoShape method exposed by Shapes object.
• Set the Line Style to one of the styles as offered by Aspose.Slides for C++.
• Set the Width of the line.
• Set the Dash Style of the line to one of the styles offered by Aspose.Slides for C++.
• Set the Arrow Head Style and Length of the start point of the line.
• Set the Arrow Head Style and Length of the end point of the line.
• Write the modified presentation as a PPTX file.

FAQ

Can I convert a regular line into a connector so it “snaps” to shapes?

No. A regular line (an AutoShape of type Line) does not automatically become a connector. To make it snap to shapes, use the dedicated Connector type and the corresponding APIs for connections.

What should I do if a line’s properties are inherited from the theme and it’s hard to determine the final values?

Read the effective properties through the ILineFormatEffectiveData/ILineFillFormatEffectiveData interfaces—these already account for inheritance and theme styles.

Can I lock a line against editing (moving, resizing)?

Yes. Shapes provide lock objects that let you disallow editing operations.