matrixion/src/ui/RaisedButton.cc

#include <QEventTransition>
#include <QPropertyAnimation>

#include "RaisedButton.h"

void
RaisedButton::init()
{
	shadow_state_machine_ = new QStateMachine(this);
	normal_state_ = new QState;
	pressed_state_ = new QState;
	effect_ = new QGraphicsDropShadowEffect;

	effect_->setBlurRadius(7);
	effect_->setOffset(QPointF(0, 2));
	effect_->setColor(QColor(0, 0, 0, 75));

	setBackgroundMode(Qt::OpaqueMode);
	setMinimumHeight(42);
	setGraphicsEffect(effect_);
	setBaseOpacity(0.3);

	shadow_state_machine_->addState(normal_state_);
	shadow_state_machine_->addState(pressed_state_);

	normal_state_->assignProperty(effect_, "offset", QPointF(0, 2));
	normal_state_->assignProperty(effect_, "blurRadius", 7);

	pressed_state_->assignProperty(effect_, "offset", QPointF(0, 5));
	pressed_state_->assignProperty(effect_, "blurRadius", 29);

	QAbstractTransition *transition;

	transition = new QEventTransition(this, QEvent::MouseButtonPress);
	transition->setTargetState(pressed_state_);
	normal_state_->addTransition(transition);

	transition = new QEventTransition(this, QEvent::MouseButtonDblClick);
	transition->setTargetState(pressed_state_);
	normal_state_->addTransition(transition);

	transition = new QEventTransition(this, QEvent::MouseButtonRelease);
	transition->setTargetState(normal_state_);
	pressed_state_->addTransition(transition);

	QPropertyAnimation *animation;

	animation = new QPropertyAnimation(effect_, "offset", this);
	animation->setDuration(100);
	shadow_state_machine_->addDefaultAnimation(animation);

	animation = new QPropertyAnimation(effect_, "blurRadius", this);
	animation->setDuration(100);
	shadow_state_machine_->addDefaultAnimation(animation);

	shadow_state_machine_->setInitialState(normal_state_);
	shadow_state_machine_->start();
}

RaisedButton::RaisedButton(QWidget *parent)
  : FlatButton(parent)
{
	init();
}

RaisedButton::RaisedButton(const QString &text, QWidget *parent)
  : FlatButton(parent)
{
	init();
	setText(text);
}

RaisedButton::~RaisedButton()
{
}

bool
RaisedButton::event(QEvent *event)
{
	if (QEvent::EnabledChange == event->type()) {
		if (isEnabled()) {
			shadow_state_machine_->start();
			effect_->setEnabled(true);
		} else {
			shadow_state_machine_->stop();
			effect_->setEnabled(false);
		}
	}

	return FlatButton::event(event);
}