/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the tools applications of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** This file may be used under the terms of the GNU Lesser General Public | |
** License version 2.1 as published by the Free Software Foundation and | |
** appearing in the file LICENSE.LGPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | |
** | |
** In addition, as a special exception, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia Qt LGPL Exception | |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | |
** | |
** GNU General Public License Usage | |
** Alternatively, this file may be used under the terms of the GNU General | |
** Public License version 3.0 as published by the Free Software Foundation | |
** and appearing in the file LICENSE.GPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU General | |
** Public License version 3.0 requirements will be met: | |
** http://www.gnu.org/copyleft/gpl.html. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#include "colorbutton.h" | |
#include <QApplication> | |
#include <QtEvents> | |
#include <QColorDialog> | |
#include <QPainter> | |
#include <QMimeData> | |
#include <QStyle> | |
#include <QStyleOption> | |
QT_BEGIN_NAMESPACE | |
ColorButton::ColorButton(QWidget *parent) | |
: QAbstractButton(parent), mousepressed(false) | |
{ | |
setAcceptDrops(true); | |
col = Qt::black; | |
connect(this, SIGNAL(clicked()), SLOT(changeColor())); | |
} | |
ColorButton::ColorButton(const QColor &c, QWidget *parent) | |
: QAbstractButton(parent) | |
{ | |
setAcceptDrops(true); | |
col = c; | |
connect(this, SIGNAL(clicked()), SLOT(changeColor())); | |
} | |
void ColorButton::setColor(const QColor &c) | |
{ | |
col = c; | |
update(); | |
} | |
void ColorButton::changeColor() | |
{ | |
QColor c = QColorDialog::getColor(col, qApp->activeWindow()); | |
if (c.isValid()) { | |
setColor(c); | |
emit colorChanged(color()); | |
} | |
} | |
QSize ColorButton::sizeHint() const | |
{ | |
return QSize(40, 25); | |
} | |
QSize ColorButton::minimumSizeHint() const | |
{ | |
return QSize(40, 25); | |
} | |
void ColorButton::drawButton(QPainter *p) | |
{ | |
QStyleOptionButton buttonOptions; | |
buttonOptions.init(this); | |
buttonOptions.features = QStyleOptionButton::None; | |
buttonOptions.rect = rect(); | |
buttonOptions.palette = palette(); | |
buttonOptions.state = (isDown() ? QStyle::State_Sunken : QStyle::State_Raised); | |
style()->drawPrimitive(QStyle::PE_PanelButtonBevel, &buttonOptions, p, this); | |
p->save(); | |
drawButtonLabel(p); | |
p->restore(); | |
QStyleOptionFocusRect frectOptions; | |
frectOptions.init(this); | |
frectOptions.rect = style()->subElementRect(QStyle::SE_PushButtonFocusRect, &buttonOptions, this); | |
if (hasFocus()) | |
style()->drawPrimitive(QStyle::PE_FrameFocusRect, &frectOptions, p, this); | |
} | |
void ColorButton::drawButtonLabel(QPainter *p) | |
{ | |
QPalette::ColorGroup cg = | |
(isEnabled() ? (hasFocus() ? QPalette::Active : QPalette::Inactive) : QPalette::Disabled); | |
p->setPen(palette().color(cg, QPalette::ButtonText)); | |
p->setBrush(col); | |
p->drawRect(width() / 4, height() / 4, width() / 2 - 1, height() / 2 - 1); | |
} | |
void ColorButton::dragEnterEvent(QDragEnterEvent *e) | |
{ | |
if (!e->mimeData()->hasColor()) { | |
e->ignore(); | |
return; | |
} | |
} | |
void ColorButton::dragMoveEvent(QDragMoveEvent *e) | |
{ | |
if (!e->mimeData()->hasColor()) { | |
e->ignore(); | |
return; | |
} | |
e->accept(); | |
} | |
void ColorButton::dropEvent(QDropEvent *e) | |
{ | |
if (!e->mimeData()->hasColor()) { | |
e->ignore(); | |
return; | |
} | |
QColor c = qvariant_cast<QColor>(e->mimeData()->colorData()); | |
setColor(c); | |
emit colorChanged(color()); | |
} | |
void ColorButton::mousePressEvent(QMouseEvent *e) | |
{ | |
presspos = e->pos(); | |
mousepressed = true; | |
QAbstractButton::mousePressEvent(e); | |
} | |
void ColorButton::mouseReleaseEvent(QMouseEvent *e) | |
{ | |
mousepressed = false; | |
QAbstractButton::mouseReleaseEvent(e); | |
} | |
void ColorButton::mouseMoveEvent(QMouseEvent *e) | |
{ | |
if (! mousepressed) | |
return; | |
if ((presspos - e->pos()).manhattanLength() > QApplication::startDragDistance()) { | |
mousepressed = false; | |
setDown(false); | |
QDrag *drag = new QDrag(this); | |
QMimeData *data = new QMimeData; | |
data->setColorData(color()); | |
drag->setMimeData(data); | |
drag->start(Qt::CopyAction); | |
} | |
} | |
void ColorButton::paintEvent(QPaintEvent *) | |
{ | |
QPainter p(this); | |
drawButton(&p); | |
} | |
QT_END_NAMESPACE |