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/***************************************************************************
* *
* This file is part of the Fotowall project, *
* http://www.enricoros.com/opensource/fotowall *
* *
* Copyright (C) 2009 by Enrico Ros <enrico.ros@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "PanePropertyEditor.h"
#include <QLinearGradient>
#include <QMouseEvent>
#include <QPaintEvent>
#include <QPainter>
#if QT_VERSION >= 0x040600
#include <QPropertyAnimation>
#endif
PaneWidget::PaneWidget(QWidget * parent)
: QWidget(parent)
, m_range(-1.0, -1.0, 2.0, 2.0)
, m_value(0.0, 0.0)
, m_hovered(false)
, m_pressed(false)
{
}
QPointF PaneWidget::value() const
{
return m_value;
}
void PaneWidget::setValue(const QPointF & value)
{
if (value != m_value) {
m_value = value;
emit valueChanged(value);
update();
}
}
QRectF PaneWidget::range() const
{
return m_range;
}
void PaneWidget::setRange(const QRectF & range)
{
if (range != m_range) {
m_range = range;
emit rangeChanged(m_range);
update();
}
}
void PaneWidget::enterEvent(QEvent *)
{
m_hovered = true;
update();
}
void PaneWidget::leaveEvent(QEvent *)
{
m_hovered = false;
update();
}
void PaneWidget::mousePressEvent(QMouseEvent * event)
{
if (event->button() != Qt::LeftButton)
return;
m_pressed = true;
pressing(event->posF());
}
void PaneWidget::mouseMoveEvent(QMouseEvent * event)
{
if (m_pressed)
pressing(event->posF());
}
void PaneWidget::mouseReleaseEvent(QMouseEvent *)
{
m_pressed = false;
update();
}
void PaneWidget::mouseDoubleClickEvent(QMouseEvent *)
{
// using setValue directly breaks animations
pressing(screenMap(QPointF(0, 0)));
}
void PaneWidget::paintEvent(QPaintEvent * event)
{
// draw background
QPainter p(this);
if (m_hovered) {
QLinearGradient lg(0, 0, 0, height());
lg.setColorAt(0.0, QColor(128, 128, 128, 64));
lg.setColorAt(1.0, QColor(255, 255, 255, 128));
p.fillRect(event->rect(), lg);
}
#if 1
else
p.fillRect(event->rect(), QColor(64, 64, 64, 16));
#endif
// draw axis
QPointF pt = screenMap(QPointF(0, 0));
p.setPen(QPen(Qt::lightGray, 1.0));
#if 0
p.drawRect(rect().adjusted(0, 0, -1, -1));
#endif
p.setRenderHint(QPainter::Antialiasing, true);
p.drawLine(pt.x(), 0, pt.x(), height());
p.drawLine(0, pt.y(), width(), pt.y());
// draw point
pt = screenMap(m_value);
p.setPen(m_pressed ? Qt::red : QColor(50, 100, 120, 200));
p.setBrush(QColor(210, 100, 110, 120));
p.drawEllipse(pt, 5, 5);
}
void PaneWidget::pressing(const QPointF & pos)
{
if (width() < 2 || height() < 2)
return;
double px = m_range.left() + m_range.width() * pos.x() / (double)(width() - 1);
double py = m_range.top() + m_range.height() * pos.y() / (double)(height() - 1);
QPointF endValue = QPointF(qBound(m_range.left(), (qreal)px, m_range.right()), qBound(m_range.top(), (qreal)py, m_range.bottom()));
#if QT_VERSION >= 0x040600
// animate the change
QPropertyAnimation * ani = new QPropertyAnimation(this, "value");
ani->setEasingCurve(QEasingCurve::OutCubic);
ani->setDuration(500);
ani->setEndValue(endValue);
ani->start(QPropertyAnimation::DeleteWhenStopped);
#else
// set the final value
setValue(endValue);
#endif
}
QPointF PaneWidget::screenMap(const QPointF & value) const
{
if (m_range.width() <= 0 || m_range.height() <= 0)
return QPointF();
double sx = (value.x() - m_range.left()) * (double)(width() - 1) / m_range.width();
double sy = (value.y() - m_range.top()) * (double)(height() - 1) / m_range.height();
return QPointF(sx, sy);
}
PE_PaneWidget::PE_PaneWidget(PaneWidget * _pane, QObject * _target, const char * propertyName, QObject * parent)
: PE_TypeControl<PaneWidget>(_pane, _target, propertyName, parent)
{
// read initial value and link to property changes
slotPropertyChanged();
PE_LISTEN_TO_PROPERTY(slotPropertyChanged());
// link to the slider changes
connect(m_control.data(), SIGNAL(valueChanged(const QPointF &)), this, SLOT(slotPaneValueChanged(const QPointF &)));
// allow Int and Double properties only
if (m_property.type() != QVariant::PointF)
qWarning("PE_PaneWidget: unhandled property '%s' of type %d", propertyName, (int)m_property.type());
else
m_isValid = true;
}
void PE_PaneWidget::slotPaneValueChanged(const QPointF & pointfValue)
{
// set the property to the current value of the PaneWidget
if (m_control && m_target && m_property.type() == QVariant::PointF)
m_property.write(m_target.data(), pointfValue);
}
void PE_PaneWidget::slotPropertyChanged()
{
// set the control pointf as the property value
if (m_control && m_target && m_property.type() == QVariant::PointF) {
QPointF pointfValue = m_property.read(m_target.data()).toPointF();
m_control->setValue(pointfValue);
}
}
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