彻底改版2.0
This commit is contained in:
feiyangqingyun
324
third/3rd_qwt/qwt_text_label.cpp
Normal file
324
third/3rd_qwt/qwt_text_label.cpp
Normal file
@@ -0,0 +1,324 @@
|
||||
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
|
||||
* Qwt Widget Library
|
||||
* Copyright (C) 1997 Josef Wilgen
|
||||
* Copyright (C) 2002 Uwe Rathmann
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the Qwt License, Version 1.0
|
||||
*****************************************************************************/
|
||||
|
||||
#include "qwt_text_label.h"
|
||||
#include "qwt_text.h"
|
||||
#include "qwt_painter.h"
|
||||
#include <qpainter.h>
|
||||
#include <qevent.h>
|
||||
#include <qmath.h>
|
||||
|
||||
class QwtTextLabel::PrivateData
|
||||
{
|
||||
public:
|
||||
PrivateData():
|
||||
indent( 4 ),
|
||||
margin( 0 )
|
||||
{
|
||||
}
|
||||
|
||||
int indent;
|
||||
int margin;
|
||||
QwtText text;
|
||||
};
|
||||
|
||||
/*!
|
||||
Constructs an empty label.
|
||||
\param parent Parent widget
|
||||
*/
|
||||
QwtTextLabel::QwtTextLabel( QWidget *parent ):
|
||||
QFrame( parent )
|
||||
{
|
||||
init();
|
||||
}
|
||||
|
||||
/*!
|
||||
Constructs a label that displays the text, text
|
||||
\param parent Parent widget
|
||||
\param text Text
|
||||
*/
|
||||
QwtTextLabel::QwtTextLabel( const QwtText &text, QWidget *parent ):
|
||||
QFrame( parent )
|
||||
{
|
||||
init();
|
||||
d_data->text = text;
|
||||
}
|
||||
|
||||
//! Destructor
|
||||
QwtTextLabel::~QwtTextLabel()
|
||||
{
|
||||
delete d_data;
|
||||
}
|
||||
|
||||
void QwtTextLabel::init()
|
||||
{
|
||||
d_data = new PrivateData();
|
||||
setSizePolicy( QSizePolicy::Preferred, QSizePolicy::Preferred );
|
||||
}
|
||||
|
||||
/*!
|
||||
Interface for the designer plugin - does the same as setText()
|
||||
\sa plainText()
|
||||
*/
|
||||
void QwtTextLabel::setPlainText( const QString &text )
|
||||
{
|
||||
setText( QwtText( text ) );
|
||||
}
|
||||
|
||||
/*!
|
||||
Interface for the designer plugin
|
||||
|
||||
\return Text as plain text
|
||||
\sa setPlainText(), text()
|
||||
*/
|
||||
QString QwtTextLabel::plainText() const
|
||||
{
|
||||
return d_data->text.text();
|
||||
}
|
||||
|
||||
/*!
|
||||
Change the label's text, keeping all other QwtText attributes
|
||||
\param text New text
|
||||
\param textFormat Format of text
|
||||
|
||||
\sa QwtText
|
||||
*/
|
||||
void QwtTextLabel::setText( const QString &text,
|
||||
QwtText::TextFormat textFormat )
|
||||
{
|
||||
d_data->text.setText( text, textFormat );
|
||||
|
||||
update();
|
||||
updateGeometry();
|
||||
}
|
||||
|
||||
/*!
|
||||
Change the label's text
|
||||
\param text New text
|
||||
*/
|
||||
void QwtTextLabel::setText( const QwtText &text )
|
||||
{
|
||||
d_data->text = text;
|
||||
|
||||
update();
|
||||
updateGeometry();
|
||||
}
|
||||
|
||||
//! Return the text
|
||||
const QwtText &QwtTextLabel::text() const
|
||||
{
|
||||
return d_data->text;
|
||||
}
|
||||
|
||||
//! Clear the text and all QwtText attributes
|
||||
void QwtTextLabel::clear()
|
||||
{
|
||||
d_data->text = QwtText();
|
||||
|
||||
update();
|
||||
updateGeometry();
|
||||
}
|
||||
|
||||
//! Return label's text indent in pixels
|
||||
int QwtTextLabel::indent() const
|
||||
{
|
||||
return d_data->indent;
|
||||
}
|
||||
|
||||
/*!
|
||||
Set label's text indent in pixels
|
||||
\param indent Indentation in pixels
|
||||
*/
|
||||
void QwtTextLabel::setIndent( int indent )
|
||||
{
|
||||
if ( indent < 0 )
|
||||
indent = 0;
|
||||
|
||||
d_data->indent = indent;
|
||||
|
||||
update();
|
||||
updateGeometry();
|
||||
}
|
||||
|
||||
//! Return label's text margin in pixels
|
||||
int QwtTextLabel::margin() const
|
||||
{
|
||||
return d_data->margin;
|
||||
}
|
||||
|
||||
/*!
|
||||
Set label's margin in pixels
|
||||
\param margin Margin in pixels
|
||||
*/
|
||||
void QwtTextLabel::setMargin( int margin )
|
||||
{
|
||||
d_data->margin = margin;
|
||||
|
||||
update();
|
||||
updateGeometry();
|
||||
}
|
||||
|
||||
//! Return a size hint
|
||||
QSize QwtTextLabel::sizeHint() const
|
||||
{
|
||||
return minimumSizeHint();
|
||||
}
|
||||
|
||||
//! Return a minimum size hint
|
||||
QSize QwtTextLabel::minimumSizeHint() const
|
||||
{
|
||||
QSizeF sz = d_data->text.textSize( font() );
|
||||
|
||||
int mw = 2 * ( frameWidth() + d_data->margin );
|
||||
int mh = mw;
|
||||
|
||||
int indent = d_data->indent;
|
||||
if ( indent <= 0 )
|
||||
indent = defaultIndent();
|
||||
|
||||
if ( indent > 0 )
|
||||
{
|
||||
const int align = d_data->text.renderFlags();
|
||||
if ( align & Qt::AlignLeft || align & Qt::AlignRight )
|
||||
mw += d_data->indent;
|
||||
else if ( align & Qt::AlignTop || align & Qt::AlignBottom )
|
||||
mh += d_data->indent;
|
||||
}
|
||||
|
||||
sz += QSizeF( mw, mh );
|
||||
|
||||
return QSize( qCeil( sz.width() ), qCeil( sz.height() ) );
|
||||
}
|
||||
|
||||
/*!
|
||||
\param width Width
|
||||
\return Preferred height for this widget, given the width.
|
||||
*/
|
||||
int QwtTextLabel::heightForWidth( int width ) const
|
||||
{
|
||||
const int renderFlags = d_data->text.renderFlags();
|
||||
|
||||
int indent = d_data->indent;
|
||||
if ( indent <= 0 )
|
||||
indent = defaultIndent();
|
||||
|
||||
width -= 2 * frameWidth();
|
||||
if ( renderFlags & Qt::AlignLeft || renderFlags & Qt::AlignRight )
|
||||
width -= indent;
|
||||
|
||||
int height = qCeil( d_data->text.heightForWidth( width, font() ) );
|
||||
if ( ( renderFlags & Qt::AlignTop ) || ( renderFlags & Qt::AlignBottom ) )
|
||||
height += indent;
|
||||
|
||||
height += 2 * frameWidth();
|
||||
|
||||
return height;
|
||||
}
|
||||
|
||||
/*!
|
||||
Qt paint event
|
||||
\param event Paint event
|
||||
*/
|
||||
void QwtTextLabel::paintEvent( QPaintEvent *event )
|
||||
{
|
||||
QPainter painter( this );
|
||||
|
||||
if ( !contentsRect().contains( event->rect() ) )
|
||||
{
|
||||
painter.save();
|
||||
painter.setClipRegion( event->region() & frameRect() );
|
||||
drawFrame( &painter );
|
||||
painter.restore();
|
||||
}
|
||||
|
||||
painter.setClipRegion( event->region() & contentsRect() );
|
||||
|
||||
drawContents( &painter );
|
||||
}
|
||||
|
||||
//! Redraw the text and focus indicator
|
||||
void QwtTextLabel::drawContents( QPainter *painter )
|
||||
{
|
||||
const QRect r = textRect();
|
||||
if ( r.isEmpty() )
|
||||
return;
|
||||
|
||||
painter->setFont( font() );
|
||||
painter->setPen( palette().color( QPalette::Active, QPalette::Text ) );
|
||||
|
||||
drawText( painter, QRectF( r ) );
|
||||
|
||||
if ( hasFocus() )
|
||||
{
|
||||
const int m = 2;
|
||||
|
||||
QRect focusRect = contentsRect().adjusted( m, m, -m + 1, -m + 1);
|
||||
|
||||
QwtPainter::drawFocusRect( painter, this, focusRect );
|
||||
}
|
||||
}
|
||||
|
||||
//! Redraw the text
|
||||
void QwtTextLabel::drawText( QPainter *painter, const QRectF &textRect )
|
||||
{
|
||||
d_data->text.draw( painter, textRect );
|
||||
}
|
||||
|
||||
/*!
|
||||
Calculate geometry for the text in widget coordinates
|
||||
\return Geometry for the text
|
||||
*/
|
||||
QRect QwtTextLabel::textRect() const
|
||||
{
|
||||
QRect r = contentsRect();
|
||||
|
||||
if ( !r.isEmpty() && d_data->margin > 0 )
|
||||
{
|
||||
r.setRect( r.x() + d_data->margin, r.y() + d_data->margin,
|
||||
r.width() - 2 * d_data->margin, r.height() - 2 * d_data->margin );
|
||||
}
|
||||
|
||||
if ( !r.isEmpty() )
|
||||
{
|
||||
int indent = d_data->indent;
|
||||
if ( indent <= 0 )
|
||||
indent = defaultIndent();
|
||||
|
||||
if ( indent > 0 )
|
||||
{
|
||||
const int renderFlags = d_data->text.renderFlags();
|
||||
|
||||
if ( renderFlags & Qt::AlignLeft )
|
||||
r.setX( r.x() + indent );
|
||||
else if ( renderFlags & Qt::AlignRight )
|
||||
r.setWidth( r.width() - indent );
|
||||
else if ( renderFlags & Qt::AlignTop )
|
||||
r.setY( r.y() + indent );
|
||||
else if ( renderFlags & Qt::AlignBottom )
|
||||
r.setHeight( r.height() - indent );
|
||||
}
|
||||
}
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
int QwtTextLabel::defaultIndent() const
|
||||
{
|
||||
if ( frameWidth() <= 0 )
|
||||
return 0;
|
||||
|
||||
QFont fnt;
|
||||
if ( d_data->text.testPaintAttribute( QwtText::PaintUsingTextFont ) )
|
||||
fnt = d_data->text.font();
|
||||
else
|
||||
fnt = font();
|
||||
|
||||
return QFontMetrics( fnt ).width( 'x' ) / 2;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user