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qt3/src/kernel/qdrawutil.cpp

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/****************************************************************************
**
** Implementation of draw utilities
**
** Created : 950920
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt 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 Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** 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.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** 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.
**
**********************************************************************/
#include "qdrawutil.h"
#ifndef QT_NO_DRAWUTIL
#include "qbitmap.h"
#include "qpixmapcache.h"
#include "qapplication.h"
#include "qpainter.h"
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws a horizontal (\a y1 == \a y2) or vertical (\a x1 == \a x2)
shaded line using the painter \a p.
Nothing is drawn if \a y1 != \a y2 and \a x1 != \a x2 (i.e. the
line is neither horizontal nor vertical).
The color group argument \a g specifies the shading colors (\link
QColorGroup::light() light\endlink, \link QColorGroup::dark()
dark\endlink and \link QColorGroup::mid() middle\endlink colors).
The line appears sunken if \a sunken is TRUE, or raised if \a
sunken is FALSE.
The \a lineWidth argument specifies the line width for each of the
lines. It is not the total line width.
The \a midLineWidth argument specifies the width of a middle line
drawn in the QColorGroup::mid() color.
If you want to use a QFrame widget instead, you can make it
display a shaded line, for example \c{QFrame::setFrameStyle(
QFrame::HLine | QFrame::Sunken )}.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawShadeRect(), qDrawShadePanel(), QStyle::drawPrimitive()
*/
void qDrawShadeLine( QPainter *p, int x1, int y1, int x2, int y2,
const QColorGroup &g, bool sunken,
int lineWidth, int midLineWidth )
{
if (!( p && lineWidth >= 0 && midLineWidth >= 0 ) ) {
#if defined(QT_CHECK_RANGE)
qWarning( "qDrawShadeLine invalid parameters." );
#endif
return;
}
int tlw = lineWidth*2 + midLineWidth; // total line width
QPen oldPen = p->pen(); // save pen
if ( sunken )
p->setPen( g.dark() );
else
p->setPen( g.light() );
QPointArray a;
int i;
if ( y1 == y2 ) { // horizontal line
int y = y1 - tlw/2;
if ( x1 > x2 ) { // swap x1 and x2
int t = x1;
x1 = x2;
x2 = t;
}
x2--;
for ( i=0; i<lineWidth; i++ ) { // draw top shadow
a.setPoints( 3, x1+i, y+tlw-1-i,
x1+i, y+i,
x2-i, y+i );
p->drawPolyline( a );
}
if ( midLineWidth > 0 ) {
p->setPen( g.mid() );
for ( i=0; i<midLineWidth; i++ ) // draw lines in the middle
p->drawLine( x1+lineWidth, y+lineWidth+i,
x2-lineWidth, y+lineWidth+i );
}
if ( sunken )
p->setPen( g.light() );
else
p->setPen( g.dark() );
for ( i=0; i<lineWidth; i++ ) { // draw bottom shadow
a.setPoints( 3, x1+i, y+tlw-i-1,
x2-i, y+tlw-i-1,
x2-i, y+i+1 );
p->drawPolyline( a );
}
}
else if ( x1 == x2 ) { // vertical line
int x = x1 - tlw/2;
if ( y1 > y2 ) { // swap y1 and y2
int t = y1;
y1 = y2;
y2 = t;
}
y2--;
for ( i=0; i<lineWidth; i++ ) { // draw left shadow
a.setPoints( 3, x+i, y2,
x+i, y1+i,
x+tlw-1, y1+i );
p->drawPolyline( a );
}
if ( midLineWidth > 0 ) {
p->setPen( g.mid() );
for ( i=0; i<midLineWidth; i++ ) // draw lines in the middle
p->drawLine( x+lineWidth+i, y1+lineWidth, x+lineWidth+i, y2 );
}
if ( sunken )
p->setPen( g.light() );
else
p->setPen( g.dark() );
for ( i=0; i<lineWidth; i++ ) { // draw right shadow
a.setPoints( 3, x+lineWidth, y2-i,
x+tlw-i-1, y2-i,
x+tlw-i-1, y1+lineWidth );
p->drawPolyline( a );
}
}
p->setPen( oldPen );
}
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws the shaded rectangle specified by (\a x, \a y, \a w, \a h)
using the painter \a p.
The color group argument \a g specifies the shading colors (\link
QColorGroup::light() light\endlink, \link QColorGroup::dark()
dark\endlink and \link QColorGroup::mid() middle\endlink colors).
The rectangle appears sunken if \a sunken is TRUE, or raised if \a
sunken is FALSE.
The \a lineWidth argument specifies the line width for each of the
lines. It is not the total line width.
The \a midLineWidth argument specifies the width of a middle line
drawn in the QColorGroup::mid() color.
The rectangle's interior is filled with the \a fill brush unless
\a fill is 0.
If you want to use a QFrame widget instead, you can make it
display a shaded rectangle, for example \c{QFrame::setFrameStyle(
QFrame::Box | QFrame::Raised )}.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawShadeLine(), qDrawShadePanel(), qDrawPlainRect(),
QStyle::drawItem(), QStyle::drawControl()
QStyle::drawComplexControl()
*/
void qDrawShadeRect( QPainter *p, int x, int y, int w, int h,
const QColorGroup &g, bool sunken,
int lineWidth, int midLineWidth,
const QBrush *fill )
{
if ( w == 0 || h == 0 )
return;
if ( ! ( w > 0 && h > 0 && lineWidth >= 0 && midLineWidth >= 0 ) ) {
#if defined(QT_CHECK_RANGE)
qWarning( "qDrawShadeRect(): Invalid parameters" );
#endif
return;
}
QPen oldPen = p->pen();
if ( sunken )
p->setPen( g.dark() );
else
p->setPen( g.light() );
int x1=x, y1=y, x2=x+w-1, y2=y+h-1;
QPointArray a;
if ( lineWidth == 1 && midLineWidth == 0 ) {// standard shade rectangle
p->drawRect( x1, y1, w-1, h-1 );
if ( sunken )
p->setPen( g.light() );
else
p->setPen( g.dark() );
a.setPoints( 8, x1+1,y1+1, x2-2,y1+1, x1+1,y1+2, x1+1,y2-2,
x1,y2, x2,y2, x2,y1, x2,y2-1 );
p->drawLineSegments( a ); // draw bottom/right lines
} else { // more complicated
int m = lineWidth+midLineWidth;
int i, j=0, k=m;
for ( i=0; i<lineWidth; i++ ) { // draw top shadow
a.setPoints( 8, x1+i, y2-i, x1+i, y1+i, x1+i, y1+i, x2-i, y1+i,
x1+k, y2-k, x2-k, y2-k, x2-k, y2-k, x2-k, y1+k );
p->drawLineSegments( a );
k++;
}
p->setPen( g.mid() );
j = lineWidth*2;
for ( i=0; i<midLineWidth; i++ ) { // draw lines in the middle
p->drawRect( x1+lineWidth+i, y1+lineWidth+i, w-j, h-j );
j += 2;
}
if ( sunken )
p->setPen( g.light() );
else
p->setPen( g.dark() );
k = m;
for ( i=0; i<lineWidth; i++ ) { // draw bottom shadow
a.setPoints( 8, x1+1+i,y2-i, x2-i, y2-i, x2-i, y2-i, x2-i, y1+i+1,
x1+k, y2-k, x1+k, y1+k, x1+k, y1+k, x2-k, y1+k );
p->drawLineSegments( a );
k++;
}
}
if ( fill ) {
QBrush oldBrush = p->brush();
int tlw = lineWidth + midLineWidth;
p->setPen( Qt::NoPen );
p->setBrush( *fill );
p->drawRect( x+tlw, y+tlw, w-2*tlw, h-2*tlw );
p->setBrush( oldBrush );
}
p->setPen( oldPen ); // restore pen
}
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws the shaded panel specified by (\a x, \a y, \a w, \a h) using
the painter \a p.
The color group argument \a g specifies the shading colors (\link
QColorGroup::light() light\endlink, \link QColorGroup::dark()
dark\endlink and \link QColorGroup::mid() middle\endlink colors).
The panel appears sunken if \a sunken is TRUE, or raised if \a
sunken is FALSE.
The \a lineWidth argument specifies the line width.
The panel's interior is filled with the \a fill brush unless \a
fill is 0.
If you want to use a QFrame widget instead, you can make it
display a shaded panel, for example \c{QFrame::setFrameStyle(
QFrame::Panel | QFrame::Sunken )}.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawWinPanel(), qDrawShadeLine(), qDrawShadeRect(),
QStyle::drawPrimitive()
*/
void qDrawShadePanel( QPainter *p, int x, int y, int w, int h,
const QColorGroup &g, bool sunken,
int lineWidth, const QBrush *fill )
{
if ( w == 0 || h == 0 )
return;
if ( !( w > 0 && h > 0 && lineWidth >= 0 ) ) {
#if defined(QT_CHECK_RANGE)
qWarning( "qDrawShadePanel() Invalid parameters." );
#endif
}
QColor shade = g.dark();
QColor light = g.light();
if ( fill ) {
if ( fill->color() == shade )
shade = g.shadow();
if ( fill->color() == light )
light = g.midlight();
}
QPen oldPen = p->pen(); // save pen
QPointArray a( 4*lineWidth );
if ( sunken )
p->setPen( shade );
else
p->setPen( light );
int x1, y1, x2, y2;
int i;
int n = 0;
x1 = x;
y1 = y2 = y;
x2 = x+w-2;
for ( i=0; i<lineWidth; i++ ) { // top shadow
a.setPoint( n++, x1, y1++ );
a.setPoint( n++, x2--, y2++ );
}
x2 = x1;
y1 = y+h-2;
for ( i=0; i<lineWidth; i++ ) { // left shadow
a.setPoint( n++, x1++, y1 );
a.setPoint( n++, x2++, y2-- );
}
p->drawLineSegments( a );
n = 0;
if ( sunken )
p->setPen( light );
else
p->setPen( shade );
x1 = x;
y1 = y2 = y+h-1;
x2 = x+w-1;
for ( i=0; i<lineWidth; i++ ) { // bottom shadow
a.setPoint( n++, x1++, y1-- );
a.setPoint( n++, x2, y2-- );
}
x1 = x2;
y1 = y;
y2 = y+h-lineWidth-1;
for ( i=0; i<lineWidth; i++ ) { // right shadow
a.setPoint( n++, x1--, y1++ );
a.setPoint( n++, x2--, y2 );
}
p->drawLineSegments( a );
if ( fill ) { // fill with fill color
QBrush oldBrush = p->brush();
p->setPen( Qt::NoPen );
p->setBrush( *fill );
p->drawRect( x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2 );
p->setBrush( oldBrush );
}
p->setPen( oldPen ); // restore pen
}
/*!
\internal
This function draws a rectangle with two pixel line width.
It is called from qDrawWinButton() and qDrawWinPanel().
c1..c4 and fill are used:
1 1 1 1 1 2
1 3 3 3 4 2
1 3 F F 4 2
1 3 F F 4 2
1 4 4 4 4 2
2 2 2 2 2 2
*/
static void qDrawWinShades( QPainter *p,
int x, int y, int w, int h,
const QColor &c1, const QColor &c2,
const QColor &c3, const QColor &c4,
const QBrush *fill )
{
if ( w < 2 || h < 2 ) // can't do anything with that
return;
QPen oldPen = p->pen();
QPointArray a( 3 );
a.setPoints( 3, x, y+h-2, x, y, x+w-2, y );
p->setPen( c1 );
p->drawPolyline( a );
a.setPoints( 3, x, y+h-1, x+w-1, y+h-1, x+w-1, y );
p->setPen( c2 );
p->drawPolyline( a );
if ( w > 4 && h > 4 ) {
a.setPoints( 3, x+1, y+h-3, x+1, y+1, x+w-3, y+1 );
p->setPen( c3 );
p->drawPolyline( a );
a.setPoints( 3, x+1, y+h-2, x+w-2, y+h-2, x+w-2, y+1 );
p->setPen( c4 );
p->drawPolyline( a );
if ( fill ) {
QBrush oldBrush = p->brush();
p->setBrush( *fill );
p->setPen( Qt::NoPen );
p->drawRect( x+2, y+2, w-4, h-4 );
p->setBrush( oldBrush );
}
}
p->setPen( oldPen );
}
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws the Windows-style button specified by (\a x, \a y, \a w, \a
h) using the painter \a p.
The color group argument \a g specifies the shading colors (\link
QColorGroup::light() light\endlink, \link QColorGroup::dark()
dark\endlink and \link QColorGroup::mid() middle\endlink colors).
The button appears sunken if \a sunken is TRUE, or raised if \a
sunken is FALSE.
The line width is 2 pixels.
The button's interior is filled with the \a *fill brush unless \a
fill is 0.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawWinPanel(), QStyle::drawControl()
*/
void qDrawWinButton( QPainter *p, int x, int y, int w, int h,
const QColorGroup &g, bool sunken,
const QBrush *fill )
{
if ( sunken )
qDrawWinShades( p, x, y, w, h,
g.shadow(), g.light(), g.dark(), g.button(), fill );
else
qDrawWinShades( p, x, y, w, h,
g.light(), g.shadow(), g.button(), g.dark(), fill );
}
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws the Windows-style panel specified by (\a x, \a y, \a w, \a
h) using the painter \a p.
The color group argument \a g specifies the shading colors.
The panel appears sunken if \a sunken is TRUE, or raised if \a
sunken is FALSE.
The line width is 2 pixels.
The button's interior is filled with the \a fill brush unless \a
fill is 0.
If you want to use a QFrame widget instead, you can make it
display a shaded panel, for example \c{QFrame::setFrameStyle(
QFrame::WinPanel | QFrame::Raised )}.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawShadePanel(), qDrawWinButton(), QStyle::drawPrimitive()
*/
void qDrawWinPanel( QPainter *p, int x, int y, int w, int h,
const QColorGroup &g, bool sunken,
const QBrush *fill )
{
if ( sunken )
qDrawWinShades( p, x, y, w, h,
g.dark(), g.light(), g.shadow(), g.midlight(), fill );
else
qDrawWinShades( p, x, y, w, h,
g.light(), g.shadow(), g.midlight(), g.dark(), fill );
}
/*!
\relates QPainter
\c{#include <qdrawutil.h>}
Draws the plain rectangle specified by (\a x, \a y, \a w, \a h)
using the painter \a p.
The color argument \a c specifies the line color.
The \a lineWidth argument specifies the line width.
The rectangle's interior is filled with the \a fill brush unless
\a fill is 0.
If you want to use a QFrame widget instead, you can make it
display a plain rectangle, for example \c{QFrame::setFrameStyle(
QFrame::Box | QFrame::Plain )}.
\warning This function does not look at QWidget::style() or
QApplication::style(). Use the drawing functions in QStyle to make
widgets that follow the current GUI style.
\sa qDrawShadeRect(), QStyle::drawPrimitive()
*/
void qDrawPlainRect( QPainter *p, int x, int y, int w, int h, const QColor &c,
int lineWidth, const QBrush *fill )
{
if ( w == 0 || h == 0 )
return;
if ( !( w > 0 && h > 0 && lineWidth >= 0 ) ) {
#if defined(QT_CHECK_RANGE)
qWarning( "qDrawPlainRect() Invalid parameters." );
#endif
}
QPen oldPen = p->pen();
QBrush oldBrush = p->brush();
p->setPen( c );
p->setBrush( Qt::NoBrush );
for ( int i=0; i<lineWidth; i++ )
p->drawRect( x+i, y+i, w-i*2, h-i*2 );
if ( fill ) { // fill with fill color
p->setPen( Qt::NoPen );
p->setBrush( *fill );
p->drawRect( x+lineWidth, y+lineWidth, w-lineWidth*2, h-lineWidth*2 );
}
p->setPen( oldPen );
p->setBrush( oldBrush );
}
QRect qItemRect( QPainter *p, Qt::GUIStyle gs,
int x, int y, int w, int h,
int flags,
bool enabled,
const QPixmap *pixmap,
const QString& text, int len )
{
QRect result;
if ( pixmap ) {
if ( (flags & Qt::AlignVCenter) == Qt::AlignVCenter )
y += h/2 - pixmap->height()/2;
else if ( (flags & Qt::AlignBottom) == Qt::AlignBottom)
y += h - pixmap->height();
if ( (flags & Qt::AlignRight) == Qt::AlignRight )
x += w - pixmap->width();
else if ( (flags & Qt::AlignHCenter) == Qt::AlignHCenter )
x += w/2 - pixmap->width()/2;
else if ( (flags & Qt::AlignLeft) != Qt::AlignLeft && QApplication::reverseLayout() )
x += w - pixmap->width();
result = QRect(x, y, pixmap->width(), pixmap->height());
} else if ( !text.isNull() && p ) {
result = p->boundingRect( x, y, w, h, flags, text, len );
if ( gs == Qt::WindowsStyle && !enabled ) {
result.setWidth(result.width()+1);
result.setHeight(result.height()+1);
}
} else {
result = QRect(x, y, w, h);
}
return result;
}
void qDrawItem( QPainter *p, Qt::GUIStyle gs,
int x, int y, int w, int h,
int flags,
const QColorGroup &g, bool enabled,
const QPixmap *pixmap,
const QString& text, int len , const QColor* penColor )
{
p->setPen( penColor?*penColor:g.foreground() );
if ( pixmap ) {
QPixmap pm( *pixmap );
bool clip = (flags & Qt::DontClip) == 0;
if ( clip ) {
if ( pm.width() < w && pm.height() < h )
clip = FALSE;
else
p->setClipRect( x, y, w, h );
}
if ( (flags & Qt::AlignVCenter) == Qt::AlignVCenter )
y += h/2 - pm.height()/2;
else if ( (flags & Qt::AlignBottom) == Qt::AlignBottom)
y += h - pm.height();
if ( (flags & Qt::AlignRight) == Qt::AlignRight )
x += w - pm.width();
else if ( (flags & Qt::AlignHCenter) == Qt::AlignHCenter )
x += w/2 - pm.width()/2;
else if ( ((flags & Qt::AlignLeft) != Qt::AlignLeft) && QApplication::reverseLayout() ) // AlignAuto && rightToLeft
x += w - pm.width();
if ( !enabled ) {
if ( pm.mask() ) { // pixmap with a mask
if ( !pm.selfMask() ) { // mask is not pixmap itself
QPixmap pmm( *pm.mask() );
pmm.setMask( *((QBitmap *)&pmm) );
pm = pmm;
}
} else if ( pm.depth() == 1 ) { // monochrome pixmap, no mask
pm.setMask( *((QBitmap *)&pm) );
#ifndef QT_NO_IMAGE_HEURISTIC_MASK
} else { // color pixmap, no mask
QString k;
k.sprintf( "$qt-drawitem-%x", pm.serialNumber() );
QPixmap *mask = QPixmapCache::find(k);
bool del=FALSE;
if ( !mask ) {
mask = new QPixmap( pm.createHeuristicMask() );
mask->setMask( *((QBitmap*)mask) );
del = !QPixmapCache::insert( k, mask );
}
pm = *mask;
if (del) delete mask;
#endif
}
if ( gs == Qt::WindowsStyle ) {
p->setPen( g.light() );
p->drawPixmap( x+1, y+1, pm );
p->setPen( g.text() );
}
}
p->drawPixmap( x, y, pm );
if ( clip )
p->setClipping( FALSE );
} else if ( !text.isNull() ) {
if ( gs == Qt::WindowsStyle && !enabled ) {
p->setPen( g.light() );
p->drawText( x+1, y+1, w, h, flags, text, len );
p->setPen( g.text() );
}
p->drawText( x, y, w, h, flags, text, len );
}
}
/*****************************************************************************
Overloaded functions.
*****************************************************************************/
/*!
\overload void qDrawShadeLine( QPainter *p, const QPoint &p1, const QPoint &p2, const QColorGroup &g, bool sunken, int lineWidth, int midLineWidth )
*/
void qDrawShadeLine( QPainter *p, const QPoint &p1, const QPoint &p2,
const QColorGroup &g, bool sunken,
int lineWidth, int midLineWidth )
{
qDrawShadeLine( p, p1.x(), p1.y(), p2.x(), p2.y(), g, sunken,
lineWidth, midLineWidth );
}
/*!
\overload void qDrawShadeRect( QPainter *p, const QRect &r, const QColorGroup &g, bool sunken, int lineWidth, int midLineWidth, const QBrush *fill )
*/
void qDrawShadeRect( QPainter *p, const QRect &r,
const QColorGroup &g, bool sunken,
int lineWidth, int midLineWidth,
const QBrush *fill )
{
qDrawShadeRect( p, r.x(), r.y(), r.width(), r.height(), g, sunken,
lineWidth, midLineWidth, fill );
}
/*!
\overload void qDrawShadePanel( QPainter *p, const QRect &r, const QColorGroup &g, bool sunken, int lineWidth, const QBrush *fill )
*/
void qDrawShadePanel( QPainter *p, const QRect &r,
const QColorGroup &g, bool sunken,
int lineWidth, const QBrush *fill )
{
qDrawShadePanel( p, r.x(), r.y(), r.width(), r.height(), g, sunken,
lineWidth, fill );
}
/*!
\overload void qDrawWinButton( QPainter *p, const QRect &r, const QColorGroup &g, bool sunken, const QBrush *fill )
*/
void qDrawWinButton( QPainter *p, const QRect &r,
const QColorGroup &g, bool sunken,
const QBrush *fill )
{
qDrawWinButton( p, r.x(), r.y(), r.width(), r.height(), g, sunken, fill );
}
/*!
\overload void qDrawWinPanel( QPainter *p, const QRect &r, const QColorGroup &g, bool sunken, const QBrush *fill )
*/
void qDrawWinPanel( QPainter *p, const QRect &r,
const QColorGroup &g, bool sunken,
const QBrush *fill )
{
qDrawWinPanel( p, r.x(), r.y(), r.width(), r.height(), g, sunken, fill );
}
/*!
\overload void qDrawPlainRect( QPainter *p, const QRect &r, const QColor &c, int lineWidth, const QBrush *fill )
*/
void qDrawPlainRect( QPainter *p, const QRect &r, const QColor &c,
int lineWidth, const QBrush *fill )
{
qDrawPlainRect( p, r.x(), r.y(), r.width(), r.height(), c,
lineWidth, fill );
}
static void qDrawWinArrow( QPainter *p, Qt::ArrowType type, bool down,
int x, int y, int w, int h,
const QColorGroup &g, bool enabled )
{
QPointArray a; // arrow polygon
switch ( type ) {
case Qt::UpArrow:
a.setPoints( 7, -3,1, 3,1, -2,0, 2,0, -1,-1, 1,-1, 0,-2 );
break;
case Qt::DownArrow:
a.setPoints( 7, -3,-1, 3,-1, -2,0, 2,0, -1,1, 1,1, 0,2 );
break;
case Qt::LeftArrow:
a.setPoints( 7, 1,-3, 1,3, 0,-2, 0,2, -1,-1, -1,1, -2,0 );
break;
case Qt::RightArrow:
a.setPoints( 7, -1,-3, -1,3, 0,-2, 0,2, 1,-1, 1,1, 2,0 );
break;
}
if ( a.isNull() )
return;
if ( down ) {
x++;
y++;
}
QPen savePen = p->pen(); // save current pen
if (down)
p->setBrushOrigin(p->brushOrigin() + QPoint(1,1));
p->fillRect( x, y, w, h, g.brush( QColorGroup::Button ) );
if (down)
p->setBrushOrigin(p->brushOrigin() - QPoint(1,1));
if ( enabled ) {
a.translate( x+w/2, y+h/2 );
p->setPen( g.foreground() );
p->drawLineSegments( a, 0, 3 ); // draw arrow
p->drawPoint( a[6] );
} else {
a.translate( x+w/2+1, y+h/2+1 );
p->setPen( g.light() );
p->drawLineSegments( a, 0, 3 ); // draw arrow
p->drawPoint( a[6] );
a.translate( -1, -1 );
p->setPen( g.mid() );
p->drawLineSegments( a, 0, 3 ); // draw arrow
p->drawPoint( a[6] );
}
p->setPen( savePen ); // restore pen
}
#if defined(Q_CC_MSVC)
#pragma warning(disable: 4244)
#endif
#ifndef QT_NO_STYLE_MOTIF
// motif arrows look the same whether they are used or not
// is this correct?
static void qDrawMotifArrow( QPainter *p, Qt::ArrowType type, bool down,
int x, int y, int w, int h,
const QColorGroup &g, bool )
{
QPointArray bFill; // fill polygon
QPointArray bTop; // top shadow.
QPointArray bBot; // bottom shadow.
QPointArray bLeft; // left shadow.
#ifndef QT_NO_TRANSFORMATIONS
QWMatrix matrix; // xform matrix
#endif
bool vertical = type == Qt::UpArrow || type == Qt::DownArrow;
bool horizontal = !vertical;
int dim = w < h ? w : h;
int colspec = 0x0000; // color specification array
if ( dim < 2 ) // too small arrow
return;
if ( dim > 3 ) {
if ( dim > 6 )
bFill.resize( dim & 1 ? 3 : 4 );
bTop.resize( (dim/2)*2 );
bBot.resize( dim & 1 ? dim + 1 : dim );
bLeft.resize( dim > 4 ? 4 : 2 );
bLeft.putPoints( 0, 2, 0,0, 0,dim-1 );
if ( dim > 4 )
bLeft.putPoints( 2, 2, 1,2, 1,dim-3 );
bTop.putPoints( 0, 4, 1,0, 1,1, 2,1, 3,1 );
bBot.putPoints( 0, 4, 1,dim-1, 1,dim-2, 2,dim-2, 3,dim-2 );
for( int i=0; i<dim/2-2 ; i++ ) {
bTop.putPoints( i*2+4, 2, 2+i*2,2+i, 5+i*2, 2+i );
bBot.putPoints( i*2+4, 2, 2+i*2,dim-3-i, 5+i*2,dim-3-i );
}
if ( dim & 1 ) // odd number size: extra line
bBot.putPoints( dim-1, 2, dim-3,dim/2, dim-1,dim/2 );
if ( dim > 6 ) { // dim>6: must fill interior
bFill.putPoints( 0, 2, 1,dim-3, 1,2 );
if ( dim & 1 ) // if size is an odd number
bFill.setPoint( 2, dim - 3, dim / 2 );
else
bFill.putPoints( 2, 2, dim-4,dim/2-1, dim-4,dim/2 );
}
}
else {
if ( dim == 3 ) { // 3x3 arrow pattern
bLeft.setPoints( 4, 0,0, 0,2, 1,1, 1,1 );
bTop .setPoints( 2, 1,0, 1,0 );
bBot .setPoints( 2, 1,2, 2,1 );
}
else { // 2x2 arrow pattern
bLeft.setPoints( 2, 0,0, 0,1 );
bTop .setPoints( 2, 1,0, 1,0 );
bBot .setPoints( 2, 1,1, 1,1 );
}
}
if ( type == Qt::UpArrow || type == Qt::LeftArrow ) {
#ifndef QT_NO_TRANSFORMATIONS // #### fix me!
matrix.translate( x, y );
if ( vertical ) {
matrix.translate( 0, h - 1 );
matrix.rotate( -90 );
} else {
matrix.translate( w - 1, h - 1 );
matrix.rotate( 180 );
}
#endif
if ( down )
colspec = horizontal ? 0x2334 : 0x2343;
else
colspec = horizontal ? 0x1443 : 0x1434;
}
else if ( type == Qt::DownArrow || type == Qt::RightArrow ) {
#ifndef QT_NO_TRANSFORMATIONS // #### fix me!
matrix.translate( x, y );
if ( vertical ) {
matrix.translate( w-1, 0 );
matrix.rotate( 90 );
}
#endif
if ( down )
colspec = horizontal ? 0x2443 : 0x2434;
else
colspec = horizontal ? 0x1334 : 0x1343;
}
QColor *cols[5];
cols[0] = 0;
cols[1] = (QColor *)&g.button();
cols[2] = (QColor *)&g.mid();
cols[3] = (QColor *)&g.light();
cols[4] = (QColor *)&g.dark();
#define CMID *cols[ (colspec>>12) & 0xf ]
#define CLEFT *cols[ (colspec>>8) & 0xf ]
#define CTOP *cols[ (colspec>>4) & 0xf ]
#define CBOT *cols[ colspec & 0xf ]
QPen savePen = p->pen(); // save current pen
QBrush saveBrush = p->brush(); // save current brush
#ifndef QT_NO_TRANSFORMATIONS
QWMatrix wxm = p->worldMatrix();
#endif
QPen pen( Qt::NoPen );
const QBrush &brush = g.brush( QColorGroup::Button );
p->setPen( pen );
p->setBrush( brush );
#ifndef QT_NO_TRANSFORMATIONS
p->setWorldMatrix( matrix, TRUE ); // set transformation matrix
#endif
p->drawPolygon( bFill ); // fill arrow
p->setBrush( Qt::NoBrush ); // don't fill
p->setPen( CLEFT );
p->drawLineSegments( bLeft );
p->setPen( CTOP );
p->drawLineSegments( bTop );
p->setPen( CBOT );
p->drawLineSegments( bBot );
#ifndef QT_NO_TRANSFORMATIONS
p->setWorldMatrix( wxm );
#endif
p->setBrush( saveBrush ); // restore brush
p->setPen( savePen ); // restore pen
#undef CMID
#undef CLEFT
#undef CTOP
#undef CBOT
}
#endif
void qDrawArrow( QPainter *p, Qt::ArrowType type, Qt::GUIStyle style, bool down,
int x, int y, int w, int h,
const QColorGroup &g, bool enabled )
{
switch ( style ) {
case Qt::WindowsStyle:
qDrawWinArrow( p, type, down, x, y, w, h, g, enabled );
break;
#ifndef QT_NO_STYLE_MOTIF
case Qt::MotifStyle:
qDrawMotifArrow( p, type, down, x, y, w, h, g, enabled );
break;
#endif
default:
#if defined(QT_CHECK_RANGE)
qWarning( "qDrawArrow: Requested GUI style not supported" );
#else
;
#endif
}
}
#endif //QT_NO_DRAWUTIL
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