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tqt3/src/kernel/qstylesheet.cpp

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/****************************************************************************
**
** Implementation of the TQStyleSheet class
**
** Created : 990101
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file. Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
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#include "ntqstylesheet.h"
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#ifndef QT_NO_RICHTEXT
#include "private/qrichtext_p.h"
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#include "ntqlayout.h"
#include "ntqpainter.h"
#include "ntqcleanuphandler.h"
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#include <stdio.h>
class TQStyleSheetItemData
{
public:
TQStyleSheetItem::DisplayMode disp;
int fontitalic;
int fontunderline;
int fontstrikeout;
int fontweight;
int fontsize;
int fontsizelog;
int fontsizestep;
int lineSpacing;
TQString fontfamily;
TQStyleSheetItem *parentstyle;
TQString stylename;
int ncolumns;
TQColor col;
bool anchor;
int align;
TQStyleSheetItem::VerticalAlignment valign;
int margin[5];
TQStyleSheetItem::ListStyle list;
TQStyleSheetItem::WhiteSpaceMode whitespacemode;
TQString contxt;
bool selfnest;
TQStyleSheet* sheet;
};
/*!
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\class TQStyleSheetItem ntqstylesheet.h
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\brief The TQStyleSheetItem class provides an encapsulation of a set of text styles.
\ingroup text
A style sheet item consists of a name and a set of attributes that
specifiy its font, color, etc. When used in a \link TQStyleSheet
style sheet\endlink (see styleSheet()), items define the name() of
a rich text tag and the display property changes associated with
it.
The \link TQStyleSheetItem::DisplayMode display mode\endlink
attribute indicates whether the item is a block, an inline element
or a list element; see setDisplayMode(). The treatment of
whitespace is controlled by the \link
TQStyleSheetItem::WhiteSpaceMode white space mode\endlink; see
setWhiteSpaceMode(). An item's margins are set with setMargin(),
In the case of list items, the list style is set with
setListStyle(). An item may be a hypertext link anchor; see
setAnchor(). Other attributes are set with setAlignment(),
setVerticalAlignment(), setFontFamily(), setFontSize(),
setFontWeight(), setFontItalic(), setFontUnderline(),
setFontStrikeOut and setColor().
*/
/*! \enum TQStyleSheetItem::AdditionalStyleValues
\internal
*/
/*!
\enum TQStyleSheetItem::WhiteSpaceMode
This enum defines the ways in which TQStyleSheet can treat
whitespace.
\value WhiteSpaceNormal any sequence of whitespace (including
line-breaks) is equivalent to a single space.
\value WhiteSpacePre whitespace must be output exactly as given
in the input.
\value WhiteSpaceNoWrap multiple spaces are collapsed as with
WhiteSpaceNormal, but no automatic line-breaks occur. To break
lines manually, use the \c{<br>} tag.
*/
/*!
\enum TQStyleSheetItem::Margin
\value MarginLeft left margin
\value MarginRight right margin
\value MarginTop top margin
\value MarginBottom bottom margin
\value MarginAll all margins (left, right, top and bottom)
\value MarginVertical top and bottom margins
\value MarginHorizontal left and right margins
\value MarginFirstLine margin (indentation) of the first line of
a paragarph (in addition to the MarginLeft of the paragraph)
*/
/*!
Constructs a new style called \a name for the stylesheet \a
parent.
All properties in TQStyleSheetItem are initially in the "do not
change" state, except \link TQStyleSheetItem::DisplayMode display
mode\endlink, which defaults to \c DisplayInline.
*/
TQStyleSheetItem::TQStyleSheetItem( TQStyleSheet* parent, const TQString& name )
{
d = new TQStyleSheetItemData;
d->stylename = name.lower();
d->sheet = parent;
init();
if (parent)
parent->insert( this );
}
/*!
Copy constructor. Constructs a copy of \a other that is not bound
to any style sheet.
*/
TQStyleSheetItem::TQStyleSheetItem( const TQStyleSheetItem & other )
{
d = new TQStyleSheetItemData;
*d = *other.d;
}
/*!
Destroys the style. Note that TQStyleSheetItem objects become
owned by TQStyleSheet when they are created.
*/
TQStyleSheetItem::~TQStyleSheetItem()
{
delete d;
}
/*!
Assignment. Assings a copy of \a other that is not bound to any style sheet.
Unbounds first from previous style sheet.
*/
TQStyleSheetItem& TQStyleSheetItem::operator=( const TQStyleSheetItem& other )
{
if ( &other == this )
return *this;
delete d;
d = new TQStyleSheetItemData;
*d = *other.d;
return *this;
}
/*!
Returns the style sheet this item is in.
*/
TQStyleSheet* TQStyleSheetItem::styleSheet()
{
return d->sheet;
}
/*!
\overload
Returns the style sheet this item is in.
*/
const TQStyleSheet* TQStyleSheetItem::styleSheet() const
{
return d->sheet;
}
/*!
\internal
Internal initialization
*/
void TQStyleSheetItem::init()
{
d->disp = DisplayInline;
d->fontitalic = Undefined;
d->fontunderline = Undefined;
d->fontstrikeout = Undefined;
d->fontweight = Undefined;
d->fontsize = Undefined;
d->fontsizelog = Undefined;
d->fontsizestep = 0;
d->ncolumns = Undefined;
d->col = TQColor(); // !isValid()
d->anchor = FALSE;
d->align = Undefined;
d->valign = VAlignBaseline;
d->margin[0] = Undefined;
d->margin[1] = Undefined;
d->margin[2] = Undefined;
d->margin[3] = Undefined;
d->margin[4] = Undefined;
d->list = ListStyleUndefined;
d->whitespacemode = WhiteSpaceModeUndefined;
d->selfnest = TRUE;
d->lineSpacing = Undefined;
}
/*!
Returns the name of the style item.
*/
TQString TQStyleSheetItem::name() const
{
return d->stylename;
}
/*!
Returns the \link TQStyleSheetItem::DisplayMode display
mode\endlink of the style.
\sa setDisplayMode()
*/
TQStyleSheetItem::DisplayMode TQStyleSheetItem::displayMode() const
{
return d->disp;
}
/*!
\enum TQStyleSheetItem::DisplayMode
This enum type defines the way adjacent elements are displayed.
\value DisplayBlock elements are displayed as a rectangular block
(e.g. \c{<p>...</p>}).
\value DisplayInline elements are displayed in a horizontally
flowing sequence (e.g. \c{<em>...</em>}).
\value DisplayListItem elements are displayed in a vertical
sequence (e.g. \c{<li>...</li>}).
\value DisplayNone elements are not displayed at all.
*/
/*!
Sets the display mode of the style to \a m.
\sa displayMode()
*/
void TQStyleSheetItem::setDisplayMode(DisplayMode m)
{
d->disp=m;
}
/*!
Returns the alignment of this style. Possible values are \c
AlignAuto, \c AlignLeft, \c AlignRight, \c AlignCenter or \c
AlignJustify.
\sa setAlignment(), TQt::AlignmentFlags
*/
int TQStyleSheetItem::alignment() const
{
return d->align;
}
/*!
Sets the alignment to \a f. This only makes sense for styles with
a \link TQStyleSheetItem::DisplayMode display mode\endlink of
DisplayBlock. Possible values are \c AlignAuto, \c AlignLeft,
\c AlignRight, \c AlignCenter or \c AlignJustify.
\sa alignment(), displayMode(), TQt::AlignmentFlags
*/
void TQStyleSheetItem::setAlignment( int f )
{
d->align = f;
}
/*!
Returns the vertical alignment of the style. Possible values are
\c VAlignBaseline, \c VAlignSub or \c VAlignSuper.
\sa setVerticalAlignment()
*/
TQStyleSheetItem::VerticalAlignment TQStyleSheetItem::verticalAlignment() const
{
return d->valign;
}
/*!
\enum TQStyleSheetItem::VerticalAlignment
This enum type defines the way elements are aligned vertically.
This is only supported for text elements.
\value VAlignBaseline align the baseline of the element (or the
bottom, if the element doesn't have a baseline) with the
baseline of the parent
\value VAlignSub subscript the element
\value VAlignSuper superscript the element
*/
/*!
Sets the vertical alignment to \a valign. Possible values are
\c VAlignBaseline, \c VAlignSub or \c VAlignSuper.
The vertical alignment property is not inherited.
\sa verticalAlignment()
*/
void TQStyleSheetItem::setVerticalAlignment( VerticalAlignment valign )
{
d->valign = valign;
}
/*!
Returns TRUE if the style sets an italic font; otherwise returns
FALSE.
\sa setFontItalic(), definesFontItalic()
*/
bool TQStyleSheetItem::fontItalic() const
{
return d->fontitalic > 0;
}
/*!
If \a italic is TRUE sets italic for the style; otherwise sets
upright.
\sa fontItalic(), definesFontItalic()
*/
void TQStyleSheetItem::setFontItalic(bool italic)
{
d->fontitalic = italic?1:0;
}
/*!
Returns TRUE if the style defines a font shape; otherwise returns
FALSE. A style does not define any shape until setFontItalic() is
called.
\sa setFontItalic(), fontItalic()
*/
bool TQStyleSheetItem::definesFontItalic() const
{
return d->fontitalic != Undefined;
}
/*!
Returns TRUE if the style sets an underlined font; otherwise
returns FALSE.
\sa setFontUnderline(), definesFontUnderline()
*/
bool TQStyleSheetItem::fontUnderline() const
{
return d->fontunderline > 0;
}
/*!
If \a underline is TRUE, sets underline for the style; otherwise
sets no underline.
\sa fontUnderline(), definesFontUnderline()
*/
void TQStyleSheetItem::setFontUnderline(bool underline)
{
d->fontunderline = underline?1:0;
}
/*!
Returns TRUE if the style defines a setting for the underline
property of the font; otherwise returns FALSE. A style does not
define this until setFontUnderline() is called.
\sa setFontUnderline(), fontUnderline()
*/
bool TQStyleSheetItem::definesFontUnderline() const
{
return d->fontunderline != Undefined;
}
/*!
Returns TRUE if the style sets a strike out font; otherwise
returns FALSE.
\sa setFontStrikeOut(), definesFontStrikeOut()
*/
bool TQStyleSheetItem::fontStrikeOut() const
{
return d->fontstrikeout > 0;
}
/*!
If \a strikeOut is TRUE, sets strike out for the style; otherwise
sets no strike out.
\sa fontStrikeOut(), definesFontStrikeOut()
*/
void TQStyleSheetItem::setFontStrikeOut(bool strikeOut)
{
d->fontstrikeout = strikeOut?1:0;
}
/*!
Returns TRUE if the style defines a setting for the strikeOut
property of the font; otherwise returns FALSE. A style does not
define this until setFontStrikeOut() is called.
\sa setFontStrikeOut(), fontStrikeOut()
*/
bool TQStyleSheetItem::definesFontStrikeOut() const
{
return d->fontstrikeout != Undefined;
}
/*!
Returns the font weight setting of the style. This is either a
valid \c TQFont::Weight or the value \c TQStyleSheetItem::Undefined.
\sa setFontWeight(), TQFont
*/
int TQStyleSheetItem::fontWeight() const
{
return d->fontweight;
}
/*!
Sets the font weight setting of the style to \a w. Valid values
are those defined by \c TQFont::Weight.
\sa TQFont, fontWeight()
*/
void TQStyleSheetItem::setFontWeight(int w)
{
d->fontweight = w;
}
/*!
Returns the logical font size setting of the style. This is either
a valid size between 1 and 7 or \c TQStyleSheetItem::Undefined.
\sa setLogicalFontSize(), setLogicalFontSizeStep(), TQFont::pointSize(), TQFont::setPointSize()
*/
int TQStyleSheetItem::logicalFontSize() const
{
return d->fontsizelog;
}
/*!
Sets the logical font size setting of the style to \a s. Valid
logical sizes are 1 to 7.
\sa logicalFontSize(), TQFont::pointSize(), TQFont::setPointSize()
*/
void TQStyleSheetItem::setLogicalFontSize(int s)
{
d->fontsizelog = s;
}
/*!
Returns the logical font size step of this style.
The default is 0. Tags such as \c big define \c +1; \c small
defines \c -1.
\sa setLogicalFontSizeStep()
*/
int TQStyleSheetItem::logicalFontSizeStep() const
{
return d->fontsizestep;
}
/*!
Sets the logical font size step of this style to \a s.
\sa logicalFontSizeStep()
*/
void TQStyleSheetItem::setLogicalFontSizeStep( int s )
{
d->fontsizestep = s;
}
/*!
Sets the font size setting of the style to \a s points.
\sa fontSize(), TQFont::pointSize(), TQFont::setPointSize()
*/
void TQStyleSheetItem::setFontSize(int s)
{
d->fontsize = s;
}
/*!
Returns the font size setting of the style. This is either a valid
point size or \c TQStyleSheetItem::Undefined.
\sa setFontSize(), TQFont::pointSize(), TQFont::setPointSize()
*/
int TQStyleSheetItem::fontSize() const
{
return d->fontsize;
}
/*!
Returns the font family setting of the style. This is either a
valid font family or TQString::null if no family has been set.
\sa setFontFamily(), TQFont::family(), TQFont::setFamily()
*/
TQString TQStyleSheetItem::fontFamily() const
{
return d->fontfamily;
}
/*!
Sets the font family setting of the style to \a fam.
\sa fontFamily(), TQFont::family(), TQFont::setFamily()
*/
void TQStyleSheetItem::setFontFamily( const TQString& fam)
{
d->fontfamily = fam;
}
/*!\obsolete
Returns the number of columns for this style.
\sa setNumberOfColumns(), displayMode(), setDisplayMode()
*/
int TQStyleSheetItem::numberOfColumns() const
{
return d->ncolumns;
}
/*!\obsolete
Sets the number of columns for this style. Elements in the style
are divided into columns.
This makes sense only if the style uses a block display mode
(see TQStyleSheetItem::DisplayMode).
\sa numberOfColumns()
*/
void TQStyleSheetItem::setNumberOfColumns(int ncols)
{
if (ncols > 0)
d->ncolumns = ncols;
}
/*!
Returns the text color of this style or an invalid color if no
color has been set.
\sa setColor() TQColor::isValid()
*/
TQColor TQStyleSheetItem::color() const
{
return d->col;
}
/*!
Sets the text color of this style to \a c.
\sa color()
*/
void TQStyleSheetItem::setColor( const TQColor &c)
{
d->col = c;
}
/*!
Returns whether this style is an anchor.
\sa setAnchor()
*/
bool TQStyleSheetItem::isAnchor() const
{
return d->anchor;
}
/*!
If \a anc is TRUE, sets this style to be an anchor (hypertext
link); otherwise sets it to not be an anchor. Elements in this
style link to other documents or anchors.
\sa isAnchor()
*/
void TQStyleSheetItem::setAnchor(bool anc)
{
d->anchor = anc;
}
/*!
Returns the whitespace mode.
\sa setWhiteSpaceMode() WhiteSpaceMode
*/
TQStyleSheetItem::WhiteSpaceMode TQStyleSheetItem::whiteSpaceMode() const
{
return d->whitespacemode;
}
/*!
Sets the whitespace mode to \a m.
\sa WhiteSpaceMode
*/
void TQStyleSheetItem::setWhiteSpaceMode(WhiteSpaceMode m)
{
d->whitespacemode = m;
}
/*!
Returns the width of margin \a m in pixels.
The margin, \a m, can be \c MarginLeft, \c MarginRight, \c
MarginTop, \c MarginBottom, or \c MarginFirstLine.
\sa setMargin() Margin
*/
int TQStyleSheetItem::margin(Margin m) const
{
if (m == MarginAll ) {
return d->margin[MarginLeft];
} else if (m == MarginVertical) {
return d->margin[MarginTop];
} else if (m == MarginHorizontal) {
return d->margin[MarginLeft];
} else {
return d->margin[m];
}
}
/*!
Sets the width of margin \a m to \a v pixels.
The margin, \a m, can be \c MarginLeft, \c MarginRight, \c
MarginTop, \c MarginBottom, \c MarginFirstLine, \c MarginAll,
\c MarginVertical or \c MarginHorizontal. The value \a v must
be >= 0.
\sa margin()
*/
void TQStyleSheetItem::setMargin(Margin m, int v)
{
if (m == MarginAll) {
d->margin[MarginLeft] = v;
d->margin[MarginRight] = v;
d->margin[MarginTop] = v;
d->margin[MarginBottom] = v;
} else if (m == MarginVertical ) {
d->margin[MarginTop] = v;
d->margin[MarginBottom] = v;
} else if (m == MarginHorizontal ) {
d->margin[MarginLeft] = v;
d->margin[MarginRight] = v;
} else {
d->margin[m] = v;
}
}
/*!
Returns the list style of the style.
\sa setListStyle() ListStyle
*/
TQStyleSheetItem::ListStyle TQStyleSheetItem::listStyle() const
{
return d->list;
}
/*!
\enum TQStyleSheetItem::ListStyle
This enum type defines how the items in a list are prefixed when
displayed.
\value ListDisc a filled circle (i.e. a bullet)
\value ListCircle an unfilled circle
\value ListSquare a filled square
\value ListDecimal an integer in base 10: \e 1, \e 2, \e 3, ...
\value ListLowerAlpha a lowercase letter: \e a, \e b, \e c, ...
\value ListUpperAlpha an uppercase letter: \e A, \e B, \e C, ...
*/
/*!
Sets the list style of the style to \a s.
This is used by nested elements that have a display mode of \c
DisplayListItem.
\sa listStyle() DisplayMode ListStyle
*/
void TQStyleSheetItem::setListStyle(ListStyle s)
{
d->list=s;
}
/*!
Returns a space-separated list of names of styles that may contain
elements of this style. If nothing has been set, contexts()
returns an empty string, which indicates that this style can be
nested everywhere.
\sa setContexts()
*/
TQString TQStyleSheetItem::contexts() const
{
return d->contxt;
}
/*!
Sets a space-separated list of names of styles that may contain
elements of this style. If \a c is empty, the style can be nested
everywhere.
\sa contexts()
*/
void TQStyleSheetItem::setContexts( const TQString& c)
{
d->contxt = TQChar(' ') + c + TQChar(' ');
}
/*!
Returns TRUE if this style can be nested into an element of style
\a s; otherwise returns FALSE.
\sa contexts(), setContexts()
*/
bool TQStyleSheetItem::allowedInContext( const TQStyleSheetItem* s) const
{
if ( d->contxt.isEmpty() )
return TRUE;
return d->contxt.find( TQChar(' ')+s->name()+TQChar(' ')) != -1;
}
/*!
Returns TRUE if this style has self-nesting enabled; otherwise
returns FALSE.
\sa setSelfNesting()
*/
bool TQStyleSheetItem::selfNesting() const
{
return d->selfnest;
}
/*!
Sets the self-nesting property for this style to \a nesting.
In order to support "dirty" HTML, paragraphs \c{<p>} and list
items \c{<li>} are not self-nesting. This means that starting a
new paragraph or list item automatically closes the previous one.
\sa selfNesting()
*/
void TQStyleSheetItem::setSelfNesting( bool nesting )
{
d->selfnest = nesting;
}
/*!
\internal
Sets the linespacing to be at least \a ls pixels.
For compatibility with previous TQt releases, small values get
treated differently: If \a ls is smaller than the default font
line spacing in pixels at parse time, the resulting line spacing
is the sum of the default line spacing plus \a ls. We recommend
not relying on this behavior.
*/
void TQStyleSheetItem::setLineSpacing( int ls )
{
d->lineSpacing = ls;
}
/*!
\obsolete
Returns the linespacing
*/
int TQStyleSheetItem::lineSpacing() const
{
return d->lineSpacing;
}
//************************************************************************
//************************************************************************
/*!
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\class TQStyleSheet ntqstylesheet.h
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\ingroup text
\brief The TQStyleSheet class is a collection of styles for rich text
rendering and a generator of tags.
\ingroup graphics
\ingroup helpsystem
By creating TQStyleSheetItem objects for a style sheet you build a
definition of a set of tags. This definition will be used by the
internal rich text rendering system to parse and display text
documents to which the style sheet applies. Rich text is normally
visualized in a TQTextEdit or a TQTextBrowser. However, TQLabel,
TQWhatsThis and TQMessageBox also support it, and other classes are
likely to follow. With TQSimpleRichText it is possible to use the
rich text renderer for custom widgets as well.
The default TQStyleSheet object has the following style bindings,
sorted by structuring bindings, anchors, character style bindings
(i.e. inline styles), special elements such as horizontal lines or
images, and other tags. In addition, rich text supports simple
HTML tables.
The structuring tags are
\table
\header \i Structuring tags \i Notes
\row \i \c{<qt>}...\c{</qt>}
\i A TQt rich text document. It understands the following
attributes:
\list
\i \c title -- The caption of the document. This attribute is
easily accessible with TQTextEdit::documentTitle().
\i \c type -- The type of the document. The default type is \c
page. It indicates that the document is displayed in a
page of its own. Another style is \c detail, which can be
used to explain certain expressions in more detail in a
few sentences. For \c detail, TQTextBrowser will then keep
the current page and display the new document in a small
popup similar to TQWhatsThis. Note that links will not work
in documents with \c{<qt type="detail">...</qt>}.
\i \c bgcolor -- The background color, for example \c
bgcolor="yellow" or \c bgcolor="#0000FF".
\i \c background -- The background pixmap, for example \c
background="granite.xpm". The pixmap name will be resolved
by a TQMimeSourceFactory().
\i \c text -- The default text color, for example \c text="red".
\i \c link -- The link color, for example \c link="green".
\endlist
\row \i \c{<h1>...</h1>}
\i A top-level heading.
\row \i \c{<h2>...</h2>}
\i A sublevel heading.
\row \i \c{<h3>...</h3>}
\i A sub-sublevel heading.
\row \i \c{<h4>...</h4>} \c{<h5>...</h5>}
\i Headings of lesser importance.
\row \i \c{<p>...</p>}
\i A left-aligned paragraph. Adjust the alignment with the \c
align attribute. Possible values are \c left, \c right and
\c center.
\row \i \c{<center>...}<br>\c{</center>}
\i A centered paragraph.
\row \i \c{<blockquote>...}<br>\c{</blockquote>}
\i An indented paragraph that is useful for quotes.
\row \i \c{<ul>...</ul>}
\i An unordered list. You can also pass a type argument to
define the bullet style. The default is \c type=disc;
other types are \c circle and \c square.
\row \i \c{<ol>...</ol>}
\i An ordered list. You can also pass a type argument to
define the enumeration label style. The default is \c
type="1"; other types are \c "a" and \c "A".
\row \i \c{<li>...</li>}
\i A list item. This tag can be used only within the context
of \c{<ol>} or \c{<ul>}.
\row \i \c{<dl>...</dl>}
\i A list of definitions, consisting of terms and descriptions.
\row \i \c{<dt>...</dt>}
\i A term in a list of definitions. This tag can be used only
in the context of \c{<dl>...</dl>}.
\row \i \c{<dd>...</dd>}
\i A description in a list of definitions. This tag can be
used only in the context of \c{<dl>...</dl>}.
\row \i \c{<pre>...</pre>}
\i For larger chunks of code. Whitespaces in the contents are
preserved. For small bits of code use the inline-style \c
code.
\row \i \c{<div>...</div>} and \c{<span>...</span>}
\i Block grouping elements. These are used to structure the
document, and are often used to provide hints about the
intended presentation of the document.
\endtable
Anchors and links are done with a single tag:
\table
\header \i Anchor tags \i Notes
\row \i \c{<a>...</a>}
\i An anchor or link.
\list
\i A link is created by using an \c href
attribute, for example
<br>\c{<a href="target.qml">Link Text</a>}. Links to
targets within a document are achieved in the same way
as for HTML, e.g.
<br>\c{<a href="target.qml#subtitle">Link Text</a>}.
\i A target is created by using a \c name
attribute, for example
<br>\c{<a name="subtitle"><h2>Sub Title</h2></a>}.
\endlist
\endtable
The default character style bindings are
\table
\header \i Style tags \i Notes
\row \i \c{<em>...</em>}
\i Emphasized. By default this is the same as \c{<i>...</i>}
(italic).
\row \i \c{<strong>...</strong>}
\i Strong. By default this is the same as \c{<b>...</b>}
(bold).
\row \i \c{<i>...</i>}
\i Italic font style.
\row \i \c{<b>...</b>}
\i Bold font style.
\row \i \c{<u>...</u>}
\i Underlined font style.
\row \i \c{<s>...</s>}
\i Strike out font style.
\row \i \c{<big>...</big>}
\i A larger font size.
\row \i \c{<small>...</small>}
\i A smaller font size.
\row \i \c{<sub>...</sub>}
\i Subscripted text
\row \i \c{<sup>...</sup>}
\i Superscripted text
\row \i \c{<code>...</code>}
\i Indicates code. By default this is the same as
\c{<tt>...</tt>} (typewriter). For larger chunks of code
use the block-tag \c{<}\c{pre>}.
\row \i \c{<tt>...</tt>}
\i Typewriter font style.
\row \i \c{<font>...</font>}
\i Customizes the font size, family and text color. The tag
understands the following attributes:
\list
\i \c color -- The text color, for example \c color="red" or
\c color="#FF0000".
\i \c size -- The logical size of the font. Logical sizes 1
to 7 are supported. The value may either be absolute
(for example, \c size=3) or relative (\c size=-2). In
the latter case the sizes are simply added.
\i \c face -- The family of the font, for example \c face=times.
\endlist
\endtable
Special elements are:
\table
\header \i Special tags \i Notes
\row \i \c{<img>}
\i An image. The image name for the mime source factory is
given in the source attribute, for example
\c{<img src="qt.xpm">} The image tag also understands the
attributes \c width and \c height that determine the size
of the image. If the pixmap does not fit the specified
size it will be scaled automatically (by using
TQImage::smoothScale()).
<br>
The \c align attribute determines where the image is
placed. By default, an image is placed inline just like a
normal character. Specify \c left or \c right to place the
image at the respective side.
\row \i \c{<hr>}
\i A horizontal line.
\row \i \c{<br>}
\i A line break.
\row \i \c{<nobr>...</nobr>}
\i No break. Prevents word wrap.
\endtable
In addition, rich text supports simple HTML tables. A table
consists of one or more rows each of which contains one or more
cells. Cells are either data cells or header cells, depending on
their content. Cells which span rows and columns are supported.
\table
\header \i Table tags \i Notes
\row \i \c{<table>...</table>}
\i A table. Tables support the following attributes:
\list
\i \c bgcolor -- The background color.
\i \c width -- The table width. This is either an absolute
pixel width or a relative percentage of the table's
width, for example \c width=80%.
\i \c border -- The width of the table border. The default is
0 (= no border).
\i \c cellspacing -- Additional space around the table cells.
The default is 2.
\i \c cellpadding -- Additional space around the contents of
table cells. The default is 1.
\endlist
\row \i \c{<tr>...</tr>}
\i A table row. This is only valid within a \c table. Rows
support the following attribute:
\list
\i \c bgcolor -- The background color.
\endlist
\row \i \c{<th>...</th>}
\i A table header cell. Similar to \c td, but defaults to
center alignment and a bold font.
\row \i \c{<td>...</td>}
\i A table data cell. This is only valid within a \c tr.
Cells support the following attributes:
\list
\i \c bgcolor -- The background color.
\i \c width -- The cell width. This is either an absolute
pixel width or a relative percentage of table's width,
for example \c width=50%.
\i \c colspan -- Specifies how many columns this cell spans.
The default is 1.
\i \c rowspan -- Specifies how many rows this cell spans. The
default is 1.
\i \c align -- Alignment; possible values are \c left, \c
right, and \c center. The default is \c left.
\i \c valign -- Vertical alignment; possible values are \c
top, \c middle, and \c bottom. The default is \c middle.
\endlist
\endtable
*/
/*!
Creates a style sheet called \a name, with parent \a parent. Like
any TQObject it will be deleted when its parent is destroyed (if
the child still exists).
By default the style sheet has the tag definitions defined above.
*/
TQStyleSheet::TQStyleSheet( TQObject *parent, const char *name )
: TQObject( parent, name )
{
init();
}
/*!
Destroys the style sheet. All styles inserted into the style sheet
will be deleted.
*/
TQStyleSheet::~TQStyleSheet()
{
}
/*!
\internal
Initialized the style sheet to the basic TQt style.
*/
void TQStyleSheet::init()
{
styles.setAutoDelete( TRUE );
nullstyle = new TQStyleSheetItem( this,
TQString::fromLatin1("") );
TQStyleSheetItem* style;
style = new TQStyleSheetItem( this, "qml" ); // compatibility
style->setDisplayMode( TQStyleSheetItem::DisplayBlock );
style = new TQStyleSheetItem( this, TQString::fromLatin1("qt") );
style->setDisplayMode( TQStyleSheetItem::DisplayBlock );
style = new TQStyleSheetItem( this, TQString::fromLatin1("a") );
style->setAnchor( TRUE );
style = new TQStyleSheetItem( this, TQString::fromLatin1("em") );
style->setFontItalic( TRUE );
style = new TQStyleSheetItem( this, TQString::fromLatin1("i") );
style->setFontItalic( TRUE );
style = new TQStyleSheetItem( this, TQString::fromLatin1("big") );
style->setLogicalFontSizeStep( 1 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("large") ); // compatibility
style->setLogicalFontSizeStep( 1 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("small") );
style->setLogicalFontSizeStep( -1 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("strong") );
style->setFontWeight( TQFont::Bold);
style = new TQStyleSheetItem( this, TQString::fromLatin1("b") );
style->setFontWeight( TQFont::Bold);
style = new TQStyleSheetItem( this, TQString::fromLatin1("h1") );
style->setFontWeight( TQFont::Bold);
style->setLogicalFontSize(6);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginTop, 18);
style-> setMargin(TQStyleSheetItem::MarginBottom, 12);
style = new TQStyleSheetItem( this, TQString::fromLatin1("h2") );
style->setFontWeight( TQFont::Bold);
style->setLogicalFontSize(5);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginTop, 16);
style-> setMargin(TQStyleSheetItem::MarginBottom, 12);
style = new TQStyleSheetItem( this, TQString::fromLatin1("h3") );
style->setFontWeight( TQFont::Bold);
style->setLogicalFontSize(4);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginTop, 14);
style-> setMargin(TQStyleSheetItem::MarginBottom, 12);
style = new TQStyleSheetItem( this, TQString::fromLatin1("h4") );
style->setFontWeight( TQFont::Bold);
style->setLogicalFontSize(3);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginVertical, 12);
style = new TQStyleSheetItem( this, TQString::fromLatin1("h5") );
style->setFontWeight( TQFont::Bold);
style->setLogicalFontSize(2);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginTop, 12);
style-> setMargin(TQStyleSheetItem::MarginBottom, 4);
style = new TQStyleSheetItem( this, TQString::fromLatin1("p") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style-> setMargin(TQStyleSheetItem::MarginVertical, 12);
style->setSelfNesting( FALSE );
style = new TQStyleSheetItem( this, TQString::fromLatin1("center") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setAlignment( AlignCenter );
style = new TQStyleSheetItem( this, TQString::fromLatin1("twocolumn") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setNumberOfColumns( 2 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("multicol") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
(void) new TQStyleSheetItem( this, TQString::fromLatin1("font") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("ul") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setListStyle( TQStyleSheetItem::ListDisc );
style-> setMargin(TQStyleSheetItem::MarginVertical, 12);
style->setMargin( TQStyleSheetItem::MarginLeft, 40 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("ol") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setListStyle( TQStyleSheetItem::ListDecimal );
style-> setMargin(TQStyleSheetItem::MarginVertical, 12);
style->setMargin( TQStyleSheetItem::MarginLeft, 40 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("li") );
style->setDisplayMode(TQStyleSheetItem::DisplayListItem);
style->setSelfNesting( FALSE );
style = new TQStyleSheetItem( this, TQString::fromLatin1("code") );
style->setFontFamily( TQString::fromLatin1("Courier New,courier") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("tt") );
style->setFontFamily( TQString::fromLatin1("Courier New,courier") );
new TQStyleSheetItem(this, TQString::fromLatin1("img"));
new TQStyleSheetItem(this, TQString::fromLatin1("br"));
new TQStyleSheetItem(this, TQString::fromLatin1("hr"));
style = new TQStyleSheetItem(this, TQString::fromLatin1("sub"));
style->setVerticalAlignment( TQStyleSheetItem::VAlignSub );
style = new TQStyleSheetItem(this, TQString::fromLatin1("sup"));
style->setVerticalAlignment( TQStyleSheetItem::VAlignSuper );
style = new TQStyleSheetItem( this, TQString::fromLatin1("pre") );
style->setFontFamily( TQString::fromLatin1("Courier New,courier") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setWhiteSpaceMode(TQStyleSheetItem::WhiteSpacePre);
style-> setMargin(TQStyleSheetItem::MarginVertical, 12);
style = new TQStyleSheetItem( this, TQString::fromLatin1("blockquote") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setMargin(TQStyleSheetItem::MarginHorizontal, 40 );
style = new TQStyleSheetItem( this, TQString::fromLatin1("head") );
style->setDisplayMode(TQStyleSheetItem::DisplayNone);
style = new TQStyleSheetItem( this, TQString::fromLatin1("body") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style = new TQStyleSheetItem( this, TQString::fromLatin1("div") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock) ;
style = new TQStyleSheetItem( this, TQString::fromLatin1("span") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("dl") );
style-> setMargin(TQStyleSheetItem::MarginVertical, 8);
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style = new TQStyleSheetItem( this, TQString::fromLatin1("dt") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setContexts(TQString::fromLatin1("dl") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("dd") );
style->setDisplayMode(TQStyleSheetItem::DisplayBlock);
style->setMargin(TQStyleSheetItem::MarginLeft, 30);
style->setContexts(TQString::fromLatin1("dt dl") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("u") );
style->setFontUnderline( TRUE);
style = new TQStyleSheetItem( this, TQString::fromLatin1("s") );
style->setFontStrikeOut( TRUE);
style = new TQStyleSheetItem( this, TQString::fromLatin1("nobr") );
style->setWhiteSpaceMode( TQStyleSheetItem::WhiteSpaceNoWrap );
// compatibily with some minor 3.0.x TQt versions that had an
// undocumented <wsp> tag. ### Remove 3.1
style = new TQStyleSheetItem( this, TQString::fromLatin1("wsp") );
style->setWhiteSpaceMode( TQStyleSheetItem::WhiteSpacePre );
// tables
style = new TQStyleSheetItem( this, TQString::fromLatin1("table") );
style = new TQStyleSheetItem( this, TQString::fromLatin1("tr") );
style->setContexts(TQString::fromLatin1("table"));
style = new TQStyleSheetItem( this, TQString::fromLatin1("td") );
style->setContexts(TQString::fromLatin1("tr"));
style = new TQStyleSheetItem( this, TQString::fromLatin1("th") );
style->setFontWeight( TQFont::Bold );
style->setAlignment( TQt::AlignCenter );
style->setContexts(TQString::fromLatin1("tr"));
style = new TQStyleSheetItem( this, TQString::fromLatin1("html") );
}
static TQStyleSheet* defaultsheet = 0;
Automated update from qt3
13 years ago
static TQSingleCleanupHandler<TQStyleSheet> tqt_cleanup_stylesheet;
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
13 years ago
/*!
Returns the application-wide default style sheet. This style sheet
is used by rich text rendering classes such as TQSimpleRichText,
TQWhatsThis and TQMessageBox to define the rendering style and
available tags within rich text documents. It also serves as the
initial style sheet for the more complex render widgets, TQTextEdit
and TQTextBrowser.
\sa setDefaultSheet()
*/
TQStyleSheet* TQStyleSheet::defaultSheet()
{
if (!defaultsheet) {
defaultsheet = new TQStyleSheet();
Automated update from qt3
13 years ago
tqt_cleanup_stylesheet.set( &defaultsheet );
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
13 years ago
}
return defaultsheet;
}
/*!
Sets the application-wide default style sheet to \a sheet,
deleting any style sheet previously set. The ownership is
transferred to TQStyleSheet.
\sa defaultSheet()
*/
void TQStyleSheet::setDefaultSheet( TQStyleSheet* sheet)
{
if ( defaultsheet != sheet ) {
if ( defaultsheet )
Automated update from qt3
13 years ago
tqt_cleanup_stylesheet.reset();
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
13 years ago
delete defaultsheet;
}
defaultsheet = sheet;
if ( defaultsheet )
Automated update from qt3
13 years ago
tqt_cleanup_stylesheet.set( &defaultsheet );
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
13 years ago
}
/*!\internal
Inserts \a style. Any tags generated after this time will be
bound to this style. Note that \a style becomes owned by the
style sheet and will be deleted when the style sheet is destroyed.
*/
void TQStyleSheet::insert( TQStyleSheetItem* style )
{
styles.insert(style->name(), style);
}
/*!
Returns the style called \a name or 0 if there is no such style.
*/
TQStyleSheetItem* TQStyleSheet::item( const TQString& name)
{
if ( name.isNull() )
return 0;
return styles[name];
}
/*!
\overload
Returns the style called \a name or 0 if there is no such style
(const version)
*/
const TQStyleSheetItem* TQStyleSheet::item( const TQString& name) const
{
if ( name.isNull() )
return 0;
return styles[name];
}
/*!
\preliminary
Generates an internal object for the tag called \a name, given the
attributes \a attr, and using additional information provided by
the mime source factory \a factory.
\a context is the optional context of the document, i.e. the path
to look for relative links. This becomes important if the text
contains relative references, for example within image tags.
TQSimpleRichText always uses the default mime source factory (see
\l{TQMimeSourceFactory::defaultFactory()}) to resolve these
references. The context will then be used to calculate the
absolute path. See TQMimeSourceFactory::makeAbsolute() for details.
\a emptyTag and \a doc are for internal use only.
This function should not be used in application code.
*/
#ifndef QT_NO_TEXTCUSTOMITEM
TQTextCustomItem* TQStyleSheet::tag( const TQString& name,
const TQMap<TQString, TQString> &attr,
const TQString& context,
const TQMimeSourceFactory& factory,
bool /*emptyTag */, TQTextDocument *doc ) const
{
const TQStyleSheetItem* style = item( name );
// first some known tags
if ( !style )
return 0;
if ( style->name() == "img" )
return new TQTextImage( doc, attr, context, (TQMimeSourceFactory&)factory );
if ( style->name() == "hr" )
return new TQTextHorizontalLine( doc, attr, context, (TQMimeSourceFactory&)factory );
return 0;
}
#endif
/*! Auxiliary function. Converts the plain text string \a plain to a
rich text formatted paragraph while preserving most of its look.
\a mode defines the whitespace mode. Possible values are \c
TQStyleSheetItem::WhiteSpacePre (no wrapping, all whitespaces
preserved) and \c TQStyleSheetItem::WhiteSpaceNormal (wrapping,
simplified whitespaces).
\sa escape()
*/
TQString TQStyleSheet::convertFromPlainText( const TQString& plain, TQStyleSheetItem::WhiteSpaceMode mode )
{
int col = 0;
TQString rich;
rich += "<p>";
for ( int i = 0; i < int(plain.length()); ++i ) {
if ( plain[i] == '\n' ){
int c = 1;
while ( i+1 < int(plain.length()) && plain[i+1] == '\n' ) {
i++;
c++;
}
if ( c == 1)
rich += "<br>\n";
else {
rich += "</p>\n";
while ( --c > 1 )
rich += "<br>\n";
rich += "<p>";
}
col = 0;
} else {
if ( mode == TQStyleSheetItem::WhiteSpacePre && plain[i] == '\t' ){
rich += 0x00a0U;
++col;
while ( col % 8 ) {
rich += 0x00a0U;
++col;
}
}
else if ( mode == TQStyleSheetItem::WhiteSpacePre && plain[i].isSpace() )
rich += 0x00a0U;
else if ( plain[i] == '<' )
rich +="&lt;";
else if ( plain[i] == '>' )
rich +="&gt;";
else if ( plain[i] == '&' )
rich +="&amp;";
else
rich += plain[i];
++col;
}
}
if ( col != 0 )
rich += "</p>";
return rich;
}
/*!
Auxiliary function. Converts the plain text string \a plain to a
rich text formatted string with any HTML meta-characters escaped.
\sa convertFromPlainText()
*/
TQString TQStyleSheet::escape( const TQString& plain)
{
TQString rich;
for ( int i = 0; i < int(plain.length()); ++i ) {
if ( plain[i] == '<' )
rich +="&lt;";
else if ( plain[i] == '>' )
rich +="&gt;";
else if ( plain[i] == '&' )
rich +="&amp;";
else
rich += plain[i];
}
return rich;
}
// Must doc this enum somewhere, and it is logically related to TQStyleSheet
/*!
\enum TQt::TextFormat
This enum is used in widgets that can display both plain text and
rich text, e.g. TQLabel. It is used for deciding whether a text
string should be interpreted as one or the other. This is normally
done by passing one of the enum values to a setTextFormat()
function.
\value PlainText The text string is interpreted as a plain text
string.
\value RichText The text string is interpreted as a rich text
string using the current TQStyleSheet::defaultSheet().
\value AutoText The text string is interpreted as for \c RichText
if TQStyleSheet::mightBeRichText() returns TRUE, otherwise as
\c PlainText.
\value LogText A special, limited text format which is only used
by TQTextEdit in an optimized mode.
*/
/*!
Returns TRUE if the string \a text is likely to be rich text;
otherwise returns FALSE.
This function uses a fast and therefore simple heuristic. It
mainly checks whether there is something that looks like a tag
before the first line break. Although the result may be correct
for common cases, there is no guarantee.
*/
bool TQStyleSheet::mightBeRichText( const TQString& text)
{
if ( text.isEmpty() )
return FALSE;
int start = 0;
while ( start < int(text.length()) && text[start].isSpace() )
++start;
if ( text.mid( start, 5 ).lower() == "<!doc" )
return TRUE;
int open = start;
while ( open < int(text.length()) && text[open] != '<'
&& text[open] != '\n' ) {
if ( text[open] == '&' && text.mid(open+1,3) == "lt;" )
return TRUE; // support desperate attempt of user to see <...>
++open;
}
if ( open < (int)text.length() && text[open] == '<' ) {
int close = text.find('>', open);
if ( close > -1 ) {
TQString tag;
for (int i = open+1; i < close; ++i) {
if ( text[i].isDigit() || text[i].isLetter() )
tag += text[i];
else if ( !tag.isEmpty() && text[i].isSpace() )
break;
else if ( !text[i].isSpace() && (!tag.isEmpty() || text[i] != '!' ) )
return FALSE; // that's not a tag
}
return defaultSheet()->item( tag.lower() ) != 0;
}
}
return FALSE;
}
/*!
\fn void TQStyleSheet::error( const TQString& msg) const
This virtual function is called when an error occurs when
processing rich text. Reimplement it if you need to catch error
messages.
Errors might occur if some rich text strings contain tags that are
not understood by the stylesheet, if some tags are nested
incorrectly, or if tags are not closed properly.
\a msg is the error message.
*/
void TQStyleSheet::error( const TQString& ) const
{
}
/*!
Scales the font \a font to the appropriate physical point size
corresponding to the logical font size \a logicalSize.
When calling this function, \a font has a point size corresponding
to the logical font size 3.
Logical font sizes range from 1 to 7, with 1 being the smallest.
\sa TQStyleSheetItem::logicalFontSize(), TQStyleSheetItem::logicalFontSizeStep(), TQFont::setPointSize()
*/
void TQStyleSheet::scaleFont( TQFont& font, int logicalSize ) const
{
if ( logicalSize < 1 )
logicalSize = 1;
if ( logicalSize > 7 )
logicalSize = 7;
int baseSize = font.pointSize();
bool pixel = FALSE;
if ( baseSize == -1 ) {
baseSize = font.pixelSize();
pixel = TRUE;
}
int s;
switch ( logicalSize ) {
case 1:
s = 7*baseSize/10;
break;
case 2:
s = (8 * baseSize) / 10;
break;
case 4:
s = (12 * baseSize) / 10;
break;
case 5:
s = (15 * baseSize) / 10;
break;
case 6:
s = 2 * baseSize;
break;
case 7:
s = (24 * baseSize) / 10;
break;
default:
s = baseSize;
}
if ( pixel )
font.setPixelSize( s );
else
font.setPointSize( s );
}
#endif // QT_NO_RICHTEXT