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qt3/examples/demo/dnd/styledbutton.cpp

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/**********************************************************************
** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
**
** This file is part of Qt Designer.
**
** 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.
**
** 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 "styledbutton.h"
#include <qcolordialog.h>
#include <qpalette.h>
#include <qlabel.h>
#include <qpainter.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qapplication.h>
#include <qdragobject.h>
#include <qstyle.h>
StyledButton::StyledButton(QWidget* parent, const char* name)
: QButton( parent, name ), pix( 0 ), spix( 0 ), edit( ColorEditor ), s( 0 ), mousePressed( FALSE )
{
setMinimumSize( minimumSizeHint() );
setAcceptDrops( TRUE );
connect( this, SIGNAL(clicked()), SLOT(onEditor()));
}
StyledButton::StyledButton( const QBrush& b, QWidget* parent, const char* name, WFlags f )
: QButton( parent, name, f ), spix( 0 ), s( 0 )
{
col = b.color();
pix = b.pixmap();
setMinimumSize( minimumSizeHint() );
}
StyledButton::~StyledButton()
{
if ( pix ) {
delete pix;
pix = 0;
}
if ( spix ) {
delete spix;
spix = 0;
}
}
void StyledButton::setEditor( EditorType e )
{
if ( edit == e )
return;
edit = e;
update();
}
StyledButton::EditorType StyledButton::editor() const
{
return edit;
}
void StyledButton::setColor( const QColor& c )
{
col = c;
update();
}
void StyledButton::setPixmap( const QPixmap & pm )
{
if ( !pm.isNull() ) {
delete pix;
pix = new QPixmap( pm );
} else {
delete pix;
pix = 0;
}
scalePixmap();
}
QColor StyledButton::color() const
{
return col;
}
QPixmap* StyledButton::pixmap() const
{
return pix;
}
bool StyledButton::scale() const
{
return s;
}
void StyledButton::setScale( bool on )
{
if ( s == on )
return;
s = on;
scalePixmap();
}
QSize StyledButton::sizeHint() const
{
return QSize( 50, 25 );
}
QSize StyledButton::minimumSizeHint() const
{
return QSize( 50, 25 );
}
void StyledButton::scalePixmap()
{
delete spix;
if ( pix ) {
spix = new QPixmap( 6*width()/8, 6*height()/8 );
QImage img = pix->convertToImage();
spix->convertFromImage( s? img.smoothScale( 6*width()/8, 6*height()/8 ) : img );
} else {
spix = 0;
}
update();
}
void StyledButton::resizeEvent( QResizeEvent* e )
{
scalePixmap();
QButton::resizeEvent( e );
}
void StyledButton::drawButton( QPainter *paint )
{
style().drawPrimitive(QStyle::PE_ButtonBevel, paint, rect(), colorGroup(),
isDown() ? QStyle::Style_Sunken : QStyle::Style_Default);
drawButtonLabel(paint);
if (hasFocus())
style().drawPrimitive(QStyle::PE_FocusRect, paint,
style().subRect(QStyle::SR_PushButtonFocusRect, this),
colorGroup(), QStyle::Style_Default);
}
void StyledButton::drawButtonLabel( QPainter *paint )
{
QColor pen = isEnabled() ?
hasFocus() ? palette().active().buttonText() : palette().inactive().buttonText()
: palette().disabled().buttonText();
paint->setPen( pen );
if(!isEnabled()) {
paint->setBrush( QBrush( colorGroup().button() ) );
}
else if ( edit == PixmapEditor && spix ) {
paint->setBrush( QBrush( col, *spix ) );
paint->setBrushOrigin( width()/8, height()/8 );
} else
paint->setBrush( QBrush( col ) );
paint->drawRect( width()/8, height()/8, 6*width()/8, 6*height()/8 );
}
void StyledButton::onEditor()
{
switch (edit) {
case ColorEditor: {
QColor c = QColorDialog::getColor( palette().active().background(), this );
if ( c.isValid() ) {
setColor( c );
emit changed();
}
} break;
case PixmapEditor: {
QPixmap p;
/*
if ( pixmap() )
p = qChoosePixmap( this,*pixmap() );
else
p = qChoosePixmap( this, QPixmap() );
if ( !p.isNull() ) {
setPixmap( p );
emit changed();
}
*/
} break;
default:
break;
}
}
void StyledButton::mousePressEvent(QMouseEvent* e)
{
QButton::mousePressEvent(e);
mousePressed = TRUE;
pressPos = e->pos();
}
void StyledButton::mouseMoveEvent(QMouseEvent* e)
{
QButton::mouseMoveEvent( e );
#ifndef QT_NO_DRAGANDDROP
if ( !mousePressed )
return;
if ( ( pressPos - e->pos() ).manhattanLength() > QApplication::startDragDistance() ) {
if ( edit == ColorEditor ) {
QColorDrag *drg = new QColorDrag( col, this );
QPixmap pix( 25, 25 );
pix.fill( col );
QPainter p( &pix );
p.drawRect( 0, 0, pix.width(), pix.height() );
p.end();
drg->setPixmap( pix );
mousePressed = FALSE;
drg->dragCopy();
}
else if ( edit == PixmapEditor && pix && !pix->isNull() ) {
QImage img = pix->convertToImage();
QImageDrag *drg = new QImageDrag( img, this );
if(spix)
drg->setPixmap( *spix );
mousePressed = FALSE;
drg->dragCopy();
}
}
#endif
}
#ifndef QT_NO_DRAGANDDROP
void StyledButton::dragEnterEvent( QDragEnterEvent *e )
{
setFocus();
if ( edit == ColorEditor && QColorDrag::canDecode( e ) )
e->accept();
else if ( edit == PixmapEditor && QImageDrag::canDecode( e ) )
e->accept();
else
e->ignore();
}
void StyledButton::dragLeaveEvent( QDragLeaveEvent * )
{
if ( hasFocus() )
parentWidget()->setFocus();
}
void StyledButton::dragMoveEvent( QDragMoveEvent *e )
{
if ( edit == ColorEditor && QColorDrag::canDecode( e ) )
e->accept();
else if ( edit == PixmapEditor && QImageDrag::canDecode( e ) )
e->accept();
else
e->ignore();
}
void StyledButton::dropEvent( QDropEvent *e )
{
if ( edit == ColorEditor && QColorDrag::canDecode( e ) ) {
QColor color;
QColorDrag::decode( e, color );
setColor(color);
emit changed();
e->accept();
}
else if ( edit == PixmapEditor && QImageDrag::canDecode( e ) ) {
QImage img;
QImageDrag::decode( e, img );
QPixmap pm;
pm.convertFromImage(img);
setPixmap(pm);
emit changed();
e->accept();
} else {
e->ignore();
}
}
#endif // QT_NO_DRAGANDDROP