Texto Matemático

Este artículo muestra cómo trabajar con formas de texto matemático y dar formato a ecuaciones usando Aspose.Slides for Java.

Agregar texto matemático

Cree una forma matemática que contenga una fracción y la fórmula pitagórica.

static void addMathText() {
    Presentation presentation = new Presentation();
    try {
        ISlide slide = presentation.getSlides().get_Item(0);

        // Añadir una forma matemática a la diapositiva.
        IAutoShape mathShape = slide.getShapes().addMathShape(0, 0, 720, 150);

        // Acceder al párrafo matemático.
        IParagraph paragraph = mathShape.getTextFrame().getParagraphs().get_Item(0);
        IPortion textPortion = paragraph.getPortions().get_Item(0);
        IMathParagraph mathParagraph = ((MathPortion) textPortion).getMathParagraph();

        // Añadir una fracción simple: x / y.
        IMathElement fraction = new MathematicalText("x").divide("y");
        mathParagraph.add(new MathBlock(fraction));

        // Añadir ecuación: c² = a² + b².
        IMathBlock mathBlock = new MathematicalText("c")
                .setSuperscript("2")
                .join("=")
                .join(new MathematicalText("a").setSuperscript("2"))
                .join("+")
                .join(new MathematicalText("b").setSuperscript("2"));
        mathParagraph.add(mathBlock);
    } finally {
        presentation.dispose();
    }
}

Acceder al texto matemático

Localice una forma que contenga un párrafo matemático en la diapositiva.

static void accessMathText() {
    Presentation presentation = new Presentation("sample.pptx");
    try {
        ISlide slide = presentation.getSlides().get_Item(0);

        // Encontrar la primera forma que contiene un párrafo matemático.
        IAutoShape mathShape = null;
        for (IShape shape : slide.getShapes()) {
            if (shape instanceof IAutoShape) {
                IAutoShape autoShape = (IAutoShape) shape;
                ITextFrame textFrame = autoShape.getTextFrame();
                if (textFrame != null) {
                    boolean hasMath = false;
                    for (IParagraph paragraph : textFrame.getParagraphs()) {
                        for (IPortion portion : paragraph.getPortions()) {
                            if (portion instanceof MathPortion) {
                                hasMath = true;
                                break;
                            }
                        }
                        if (hasMath) break;
                    }
                    if (hasMath) {
                        mathShape = autoShape;
                        break;
                    }
                }
            }
        }

        if (mathShape != null) {
            IParagraph paragraph = mathShape.getTextFrame().getParagraphs().get_Item(0);
            IPortion textPortion = paragraph.getPortions().get_Item(0);
            IMathParagraph mathParagraph = ((MathPortion) textPortion).getMathParagraph();

            // Ejemplo: crear una fracción (no añadida aquí).
            IMathElement fraction = new MathematicalText("x").divide("y");

            // Utilizar mathParagraph o fraction según sea necesario...
        }
    } finally {
        presentation.dispose();
    }
}

Eliminar texto matemático

Elimine una forma matemática de la diapositiva.

static void removeMathText() {
    Presentation presentation = new Presentation();
    try {
        ISlide slide = presentation.getSlides().get_Item(0);

        IAutoShape mathShape = slide.getShapes().addMathShape(50, 50, 100, 50);

        IParagraph paragraph = mathShape.getTextFrame().getParagraphs().get_Item(0);
        IPortion textPortion = paragraph.getPortions().get_Item(0);
        IMathParagraph mathParagraph = ((MathPortion) textPortion).getMathParagraph();
        IMathElement fraction = new MathematicalText("x").divide("y");
        mathParagraph.add(new MathBlock(fraction));

        // Eliminar la forma matemática.
        slide.getShapes().remove(mathShape);
    } finally {
        presentation.dispose();
    }
}

Formatear texto matemático

Establezca las propiedades de fuente para una porción matemática.

static void formatMathText() {
    Presentation presentation = new Presentation();
    try {
        ISlide slide = presentation.getSlides().get_Item(0);

        IAutoShape mathShape = slide.getShapes().addMathShape(50, 50, 100, 50);
        IParagraph paragraph = mathShape.getTextFrame().getParagraphs().get_Item(0);
        IPortion textPortion = paragraph.getPortions().get_Item(0);
        IMathParagraph mathParagraph = ((MathPortion) textPortion).getMathParagraph();
        IMathElement fraction = new MathematicalText("x").divide("y");
        mathParagraph.add(new MathBlock(fraction));

        textPortion.getPortionFormat().setFontHeight(20);
    } finally {
        presentation.dispose();
    }
}