The QGlyphRun 類提供對字體內部字形的直接訪問。 更多...
| 頭： | #include <QGlyphRun> |
| Since: | Qt 4.8 |
| QGlyphRun () | |
| QGlyphRun (const QGlyphRun & other ) | |
| ~QGlyphRun () | |
| void | clear () |
| QVector<quint32> | glyphIndexes () const |
| bool | overline () const |
| QVector<QPointF> | positions () const |
| QRawFont | rawFont () const |
| void | setGlyphIndexes (const QVector<quint32> & glyphIndexes ) |
| void | setOverline (bool overline ) |
| void | setPositions (const QVector<QPointF> & positions ) |
| void | setRawData (const quint32 * glyphIndexArray , const QPointF * glyphPositionArray , int size ) |
| void | setRawFont (const QRawFont & rawFont ) |
| void | setStrikeOut (bool strikeOut ) |
| void | setUnderline (bool underline ) |
| bool | strikeOut () const |
| bool | underline () const |
| bool | operator!= (const QGlyphRun & other ) const |
| QGlyphRun & | operator= (const QGlyphRun & other ) |
| bool | operator== (const QGlyphRun & other ) const |
The QGlyphRun 類提供對字體內部字形的直接訪問。
When Qt displays a string of text encoded in Unicode, it will first convert the Unicode points into a list of glyph indexes and a list of positions based on one or more fonts. The Unicode representation of the text and the QFont object will in this case serve as a convenient abstraction that hides the details of what actually takes place when displaying the text on-screen. For instance, by the time the text actually reaches the screen, it may be represented by a set of fonts in addition to the one specified by the user, e.g. in case the originally selected font did not support all the writing systems contained in the text.
Under certain circumstances, it can be useful as an application developer to have more low-level control over which glyphs in a specific font are drawn to the screen. This could for instance be the case in applications that use an external font engine and text shaper together with Qt. QGlyphRun provides an interface to the raw data needed to get text on the screen. It contains a list of glyph indexes, a position for each glyph and a font.
It is the user's responsibility to ensure that the selected font actually contains the provided glyph indexes.
QTextLayout::glyphRuns () 或 QTextFragment::glyphRuns () can be used to convert unicode encoded text into a list of QGlyphRun objects, and QPainter::drawGlyphRun () can be used to draw the glyphs.
注意： 請注意 QRawFont is considered local to the thread in which it is constructed. This in turn means that a new QRawFont will have to be created and set on the QGlyphRun if it is moved to a different thread. If the QGlyphRun contains a reference to a QRawFont from a different thread than the current, it will not be possible to draw the glyphs using a QPainter , as the QRawFont is considered invalid and inaccessible in this case.
構造空的 QGlyphRun 對象。
構造 QGlyphRun 對象是副本為 other .
銷毀 QGlyphRun .
清零所有數據從 QGlyphRun 對象。
Returns the glyph indexes for this QGlyphRun 對象。
另請參閱 setGlyphIndexes () 和 setPositions ().
返迴 true，若此 QGlyphRun should be painted with an overline decoration.
另請參閱 setOverline ().
Returns the position of the edge of the baseline for each glyph in this set of glyph indexes.
另請參閱 setPositions ().
Returns the font selected for this QGlyphRun 對象。
另請參閱 setRawFont ().
Set the glyph indexes for this QGlyphRun 對象到 glyphIndexes . The glyph indexes must be valid for the selected font.
另請參閱 glyphIndexes ().
Indicates that this QGlyphRun should be painted with an overline decoration if overline is true. Otherwise the QGlyphRun should be painted with no overline decoration.
另請參閱 overline ().
Sets the positions of the edge of the baseline for each glyph in this set of glyph indexes to positions .
另請參閱 positions ().
Sets the glyph indexes and positions of this QGlyphRun to use the first size elements in the arrays glyphIndexArray and glyphPositionArray . The data is not copied. The caller must guarantee that the arrays are not deleted as long as this QGlyphRun and any copies of it exists.
另請參閱 setGlyphIndexes () 和 setPositions ().
Sets the font specified by rawFont to be the font used to look up the glyph indexes.
另請參閱 rawFont () 和 setGlyphIndexes ().
Indicates that this QGlyphRun should be painted with an strike out decoration if strikeOut is true. Otherwise the QGlyphRun should be painted with no strike out decoration.
另請參閱 strikeOut ().
Indicates that this QGlyphRun should be painted with an underline decoration if underline is true. Otherwise the QGlyphRun should be painted with no underline decoration.
另請參閱 underline ().
返迴 true，若此 QGlyphRun should be painted with a strike out decoration.
另請參閱 setStrikeOut ().
返迴 true，若此 QGlyphRun should be painted with an underline decoration.
另請參閱 setUnderline ().
比較 other 到此 QGlyphRun object. Returns true if any of the list of glyph indexes, the list of positions or the font are different, otherwise returns false.
賦值 other 到此 QGlyphRun 對象。
比較 other 到此 QGlyphRun object. Returns true if the list of glyph indexes, the list of positions and the font are all equal, otherwise returns false.
