From 6a27b85924159e90f4fa1f608ae95ab67af73cd7 Mon Sep 17 00:00:00 2001
From: FarmRadio Hangar <johannes@isomorphic.co>
Date: Tue, 17 May 2016 16:58:46 +0300
Subject: [PATCH] re-implement Raised Button animations as state machine

---
 components/raisedbutton.cpp | 98 +++++++++++--------------------------
 components/raisedbutton.h   | 28 -----------
 components/raisedbutton_p.h |  2 +
 3 files changed, 31 insertions(+), 97 deletions(-)

diff --git a/components/raisedbutton.cpp b/components/raisedbutton.cpp
index 546664a..6c40768 100644
--- a/components/raisedbutton.cpp
+++ b/components/raisedbutton.cpp
@@ -1,5 +1,6 @@
 #include "raisedbutton.h"
 #include <QGraphicsDropShadowEffect>
+#include <QEventTransition>
 #include "raisedbutton_p.h"
 
 void RaisedButtonPrivate::init()
@@ -13,6 +14,34 @@ void RaisedButtonPrivate::init()
     q->setGraphicsEffect(effect);
 
     q->setAutoFillBackground(true);
+
+    QState *normalState = new QState;
+    QState *pressedState = new QState;
+
+    machine.addState(normalState);
+    machine.addState(pressedState);
+
+    normalState->assignProperty(effect, "offset", QPoint(0, 0));
+    normalState->assignProperty(effect, "blurRadius", 7);
+
+    pressedState->assignProperty(effect, "offset", QPoint(0, 6));
+    pressedState->assignProperty(effect, "blurRadius", 20);
+
+    QAbstractTransition *transition;
+
+    transition = new QEventTransition(q, QEvent::MouseButtonPress);
+    transition->setTargetState(pressedState);
+    normalState->addTransition(transition);
+
+    transition = new QEventTransition(q, QEvent::MouseButtonRelease);
+    transition->setTargetState(normalState);
+    pressedState->addTransition(transition);
+
+    machine.setInitialState(normalState);
+
+    // add animation.. duration: 100 !!!
+
+    machine.start();
 }
 
 RaisedButton::RaisedButton(QWidget *parent)
@@ -26,72 +55,3 @@ RaisedButton::RaisedButton(QWidget *parent)
 RaisedButton::~RaisedButton()
 {
 }
-
-//#include <QDebug>
-//#include <QPropertyAnimation>
-//#include <QGraphicsDropShadowEffect>
-//#include <QStylePainter>
-//#include <QPaintEvent>
-//#include "raisedbutton.h"
-//
-//RaisedButton::RaisedButton(QWidget *parent)
-//    : FlatButton(parent)
-//{
-//    QGraphicsDropShadowEffect *effect = new QGraphicsDropShadowEffect;
-//    effect->setBlurRadius(7);
-//    effect->setOffset(QPoint(0, 0));
-//    effect->setColor(QColor(0, 0, 0, 100));
-//    setGraphicsEffect(effect);
-//
-//    setAutoFillBackground(true);
-//
-//    QPropertyAnimation *animation;
-//
-//    animation = new QPropertyAnimation;
-//    animation->setTargetObject(effect);
-//    animation->setPropertyName("offset");
-//    animation->setStartValue(QPoint(0, 6));
-//    animation->setEndValue(QPoint(0, 0));
-//    animation->setDuration(100);
-//    _group.addAnimation(animation);
-//
-//    animation = new QPropertyAnimation;
-//    animation->setTargetObject(effect);
-//    animation->setPropertyName("blurRadius");
-//    animation->setStartValue(20);
-//    animation->setEndValue(7);
-//    animation->setDuration(100);
-//    _group.addAnimation(animation);
-//
-//    connect(animation, SIGNAL(valueChanged(QVariant)), this, SLOT(update()));
-//}
-//
-//RaisedButton::~RaisedButton()
-//{
-//}
-//
-//void RaisedButton::mousePressEvent(QMouseEvent *event)
-//{
-//    _group.setDirection(QAbstractAnimation::Backward);
-//    _group.start();
-//
-//    FlatButton::mousePressEvent(event);
-//}
-//
-//void RaisedButton::mouseReleaseEvent(QMouseEvent *event)
-//{
-//    _group.setDirection(QAbstractAnimation::Forward);
-//    _group.start();
-//
-//    FlatButton::mouseReleaseEvent(event);
-//}
-//
-//void RaisedButton::paintEvent(QPaintEvent *event)
-//{
-//    Q_UNUSED(event)
-//
-//    QStylePainter painter(this);
-//
-////    painter.drawControl(QStyle::CE_PushButton, getStyleOption());
-//}
-//
diff --git a/components/raisedbutton.h b/components/raisedbutton.h
index 528ea45..d5d827e 100644
--- a/components/raisedbutton.h
+++ b/components/raisedbutton.h
@@ -19,31 +19,3 @@ private:
 };
 
 #endif // RAISEDBUTTON_H
-
-//#ifndef RAISEDBUTTON_H
-//#define RAISEDBUTTON_H
-//
-//#include <QParallelAnimationGroup>
-//#include "flatbutton.h"
-//
-//class QPropertyAnimation;
-//
-//class RaisedButton : public FlatButton
-//{
-//    Q_OBJECT
-//
-//public:
-//    explicit RaisedButton(QWidget *parent = 0);
-//    ~RaisedButton();
-//
-//protected:
-//    void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
-//    void mouseReleaseEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
-//    void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
-//
-//private:
-//    QParallelAnimationGroup _group;
-//};
-//
-//#endif // RAISEDBUTTON_H
-//
diff --git a/components/raisedbutton_p.h b/components/raisedbutton_p.h
index 821d549..cd5c205 100644
--- a/components/raisedbutton_p.h
+++ b/components/raisedbutton_p.h
@@ -14,6 +14,8 @@ public:
     {}
 
     void init();
+
+    QStateMachine machine;
 };
 
 #endif // RAISEDBUTTON_P_H