karrowbutton.cpp
/* This file is part of the KDE libraries
Copyright (C) 2001 Frerich Raabe <raabe@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "karrowbutton.h"
#include <qstyle.h>
#include <qpainter.h>
class KArrowButtonPrivate
{
public:
Qt::ArrowType arrow;
};
KArrowButton::KArrowButton(QWidget *parent, Qt::ArrowType arrow,
const char *name)
: QPushButton(parent, name)
{
d = new KArrowButtonPrivate();
d->arrow = arrow;
}
KArrowButton::~KArrowButton()
{
delete d;
}
QSize KArrowButton::sizeHint() const
{
return QSize( 12, 12 );
}
void KArrowButton::setArrowType(Qt::ArrowType a)
{
if (d->arrow != a) {
d->arrow = a;
repaint();
}
}
Qt::ArrowType KArrowButton::arrowType() const
{
return d->arrow;
}
void KArrowButton::drawButton(QPainter *p)
{
const unsigned int arrowSize = 8;
const unsigned int margin = 2;
p->fillRect( rect(), colorGroup().brush( QColorGroup::Background ) );
style().drawPrimitive( QStyle::PE_Panel, p, QRect( 0, 0, width(), height() ),
colorGroup(),
isDown() ? QStyle::Style_Sunken : QStyle::Style_Default,
QStyleOption( 2, 0 ) );
if (static_cast<unsigned int>(width()) < arrowSize + margin ||
static_cast<unsigned int>(height()) < arrowSize + margin)
return; // don't draw arrows if we are too small
unsigned int x = 0, y = 0;
if (d->arrow == DownArrow) {
x = (width() - arrowSize) / 2;
y = height() - (arrowSize + margin);
} else if (d->arrow == UpArrow) {
x = (width() - arrowSize) / 2;
y = margin;
} else if (d->arrow == RightArrow) {
x = width() - (arrowSize + margin);
y = (height() - arrowSize) / 2;
} else { // arrowType == LeftArrow
x = margin;
y = (height() - arrowSize) / 2;
}
if (isDown()) {
x++;
y++;
}
QStyle::PrimitiveElement e = QStyle::PE_ArrowLeft;
switch (d->arrow)
{
case Qt::LeftArrow: e = QStyle::PE_ArrowLeft; break;
case Qt::RightArrow: e = QStyle::PE_ArrowRight; break;
case Qt::UpArrow: e = QStyle::PE_ArrowUp; break;
case Qt::DownArrow: e = QStyle::PE_ArrowDown; break;
}
int flags = QStyle::Style_Enabled;
if ( isDown() )
flags |= QStyle::Style_Down;
style().drawPrimitive( e, p, QRect( QPoint( x, y ), QSize( arrowSize, arrowSize ) ),
colorGroup(), flags );
}
void KArrowButton::virtual_hook( int, void* )
{ /*BASE::virtual_hook( id, data );*/ }
#include "karrowbutton.moc"
KArrowButton::setArrowType
void setArrowType(Qt::ArrowType a)
Defines in what direction the arrow is pointing to.
Definition: karrowbutton.cpp:48
KArrowButton::~KArrowButton
virtual ~KArrowButton()
Destructor.
Definition: karrowbutton.cpp:38
KArrowButton::drawButton
virtual void drawButton(QPainter *)
Reimplemented from QPushButton.
Definition: karrowbutton.cpp:60
KArrowButton::KArrowButton
KArrowButton(QWidget *parent=0, Qt::ArrowType arrow=Qt::UpArrow, const char *name=0)
Constructs an arrow button.
Definition: karrowbutton.cpp:30
KArrowButton::arrowType
Qt::ArrowType arrowType() const
Returns the arrow type.
KArrowButton::sizeHint
virtual QSize sizeHint() const
Reimplemented from QPushButton.
Definition: karrowbutton.cpp:43

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