Public Types¶

enum LayoutAttribute { MinimumLayout = 1 }
enum PaintAttribute { PaintUsingTextFont = 1, PaintUsingTextColor = 2, PaintBackground = 4 }
enum TextFormat { AutoText = 0, PlainText, RichText, MathMLText, TeXText, OtherFormat = 100 }

Public Member Functions¶

QwtText (const QString &=QString::null, TextFormat textFormat=AutoText)
QwtText (const QwtText &)
~QwtText ()
QBrush backgroundBrush () const
QPen backgroundPen () const
QColor color () const
void draw (QPainter *painter, const QRect &rect) const
QFont font () const
int heightForWidth (int width, const QFont &=QFont()) const
bool isEmpty () const
bool isNull () const
int operator!= (const QwtText &) const
QwtText & operator= (const QwtText &)
int operator== (const QwtText &) const
int renderFlags () const
void setBackgroundBrush (const QBrush &)
void setBackgroundPen (const QPen &)
void setColor (const QColor &)
void setFont (const QFont &)
void setLayoutAttribute (LayoutAttribute, bool on=true)
void setPaintAttribute (PaintAttribute, bool on=true)
void setRenderFlags (int flags)
void setText (const QString &, QwtText::TextFormat textFormat=AutoText)
bool testLayoutAttribute (LayoutAttribute) const
bool testPaintAttribute (PaintAttribute) const
QString text () const
QSize textSize (const QFont &=QFont()) const
QColor usedColor (const QColor &) const
QFont usedFont (const QFont &) const

Static Public Member Functions¶

static void setTextEngine (QwtText::TextFormat, QwtTextEngine *)
static const QwtTextEngine * textEngine (const QString &text, QwtText::TextFormat=AutoText)
static const QwtTextEngine * textEngine (QwtText::TextFormat)

enum QwtText::LayoutAttribute¶

Layout Attributes. The layout attributes affects some aspects of the layout of the text.

•

MinimumLayout
Layout the text without its margins. This mode is useful if a text needs to be aligned accurately, like the tick labels of a scale. If QwtTextEngine::textMargins is not implemented for the format of the text, MinimumLayout has no effect.

enum QwtText::PaintAttribute¶

Paint Attributes. Font and color and background are optional attributes of a QwtText. The paint attributes hold the information, if they are set.

• PaintUsingTextFont
  The text has an individual font.
• PaintUsingTextColor
  The text has an individual color.
• PaintBackground
  The text has an individual background.

enum QwtText::TextFormat¶

Text format. The text format defines the QwtTextEngine, that is used to render the text.

• AutoText
  The text format is determined using QwtTextEngine::mightRender for all available text engines in increasing order > PlainText. If none of the text engines can render the text is rendered like PlainText.
• PlainText
  Draw the text as it is, using a QwtPlainTextEngine.
• RichText
  Use the Scribe framework (Qt Rich Text) to render the text.
• MathMLText
  Use a MathML (http://en.wikipedia.org/wiki/MathML) render engine to display the text. The Qwt MathML extension offers such an engine based on the MathML renderer of the Qt solutions package. Unfortunately it is only available for owners of a commercial Qt license.
• TeXText
  Use a TeX (http://en.wikipedia.org/wiki/TeX) render engine to display the text.
• OtherFormat
  The number of text formats can be extended using setTextEngine. Formats >= OtherFormat are not used by Qwt.

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QwtText::QwtText (const QString &text = QString::null, QwtText::TextFormattextFormat = AutoText)¶

Constructor

Parameters:

QBrush QwtText::backgroundBrush () const¶

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QPen QwtText::backgroundPen () const¶

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void QwtText::draw (QPainter *painter, const QRect &rect) const¶

Draw a text into a rectangle

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int QwtText::heightForWidth (intwidth, const QFont &defaultFont = QFont()) const¶

Find the height for a given width

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bool QwtText::isEmpty () const [inline]¶

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bool QwtText::isNull () const [inline]¶

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int QwtText::renderFlags () const¶

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void QwtText::setBackgroundBrush (const QBrush &brush)¶

Set the background brush

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void QwtText::setBackgroundPen (const QPen &pen)¶

Set the background pen

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void QwtText::setColor (const QColor &color)¶

Set the pen color used for painting the text.

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void QwtText::setFont (const QFont &font)¶

Set the font.

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void QwtText::setLayoutAttribute (LayoutAttributeattribute, boolon = true)¶

Change a layout attribute

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void QwtText::setPaintAttribute (PaintAttributeattribute, boolon = true)¶

Change a paint attribute

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void QwtText::setRenderFlags (intrenderFlags)¶

Change the render flags. The default setting is Qt::AlignCenter

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Note:

void QwtText::setText (const QString &text, QwtText::TextFormattextFormat = AutoText)¶

Assign a new text content

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void QwtText::setTextEngine (QwtText::TextFormatformat, QwtTextEngine *engine) [static]¶

Assign/Replace a text engine for a text format

With setTextEngine it is possible to extend Qwt with other types of text formats.

Owner of a commercial Qt license can build the qwtmathml library, that is based on the MathML renderer, that is included in MML Widget component of the Qt solutions package.

For QwtText::PlainText it is not allowed to assign a engine == NULL.

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bool QwtText::testLayoutAttribute (LayoutAttributeattribute) const¶

Test a layout attribute

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bool QwtText::testPaintAttribute (PaintAttributeattribute) const¶

Test a paint attribute

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QString QwtText::text () const¶

Return the text.

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const QwtTextEngine * QwtText::textEngine (const QString &text, QwtText::TextFormatformat = AutoText) [static]¶

Find the text engine for a text format

In case of QwtText::AutoText the first text engine (beside QwtPlainTextEngine) is returned, where QwtTextEngine::mightRender returns true. If there is none QwtPlainTextEngine is returnd.

If no text engine is registered for the format QwtPlainTextEngine is returnd.

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const QwtTextEngine * QwtText::textEngine (QwtText::TextFormatformat) [static]¶

Find the text engine for a text format. textEngine can be used to find out if a text format is supported. F.e, if one wants to use MathML labels, the MathML renderer from the commercial Qt solutions package might be required, that is not available in Qt Open Source Edition environments.

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QSize QwtText::textSize (const QFont &defaultFont = QFont()) const¶

Find the height for a given width

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Returns the size, that is needed to render text

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QColor QwtText::usedColor (const QColor &defaultColor) const¶

Return the color of the text, if it has one. Otherwise return defaultColor.

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QFont QwtText::usedFont (const QFont &defaultFont) const¶

Return the font of the text, if it has one. Otherwise return defaultFont.

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