1 files changed, 146 insertions, 0 deletions
diff --git a/src/AnimatingUiElement.cpp b/src/AnimatingUiElement.cpp
new file mode 100644
index 0000000..de7c231
--- /dev/null
+++ b/src/AnimatingUiElement.cpp
@@ -0,0 +1,146 @@
+#include <QPropertyAnimation>
+#include <QLinearGradient>
+#include <QPainter>
+#include <QDebug>
+
+#include "AnimatingUiElement.h"
+
+QPixmap* AnimatingUiElement::s_tmpGfx = 0;
+int AnimatingUiElement::s_ref = 0;
+
+AnimatingUiElement::AnimatingUiElement(const QString& text, QObject *parent, QGraphicsItem* graphicsParent) :
+    QObject(parent), QGraphicsPixmapItem(graphicsParent)
+{
+    m_durationPressed = 500;
+    m_durationReleased = 400;
+    m_text = text;
+
+    m_animation = 0;
+
+    initialize();
+}
+
+AnimatingUiElement::~AnimatingUiElement()
+{
+    s_ref--;
+
+    if (s_tmpGfx && s_ref == 0)
+    {
+        delete s_tmpGfx;
+        s_tmpGfx = 0;
+    }
+}
+
+void AnimatingUiElement::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (m_animation)
+    {
+        m_animation->stop();
+        delete m_animation;
+        m_animation = 0;
+    }
+
+    m_animation = new QPropertyAnimation(this, "scale");
+    connect(m_animation, SIGNAL(finished()), this, SLOT(animationFinished()));
+    m_animation->setDuration(m_durationPressed);
+    m_animation->setEndValue(1.3);
+    m_animation->setEasingCurve(QEasingCurve::OutBounce); //or OutBounce, OutQuint...
+
+    m_animation->start();
+
+    m_released = false;
+}
+
+void AnimatingUiElement::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    m_released = true;
+
+    if (m_animation)
+    {
+        m_animation->stop();
+        delete m_animation;
+        m_animation = 0;
+    }
+
+    m_animation = new QPropertyAnimation(this, "scale");
+    connect(m_animation, SIGNAL(finished()), this, SLOT(animationFinished()));
+    m_animation->setDuration(m_durationReleased);
+    m_animation->setEndValue(1.0);
+    m_animation->setEasingCurve(QEasingCurve::OutBounce); //or OutBounce, OutQuint...
+
+    m_animation->start();
+
+    m_released = true;
+}
+
+void AnimatingUiElement::initialize()
+{
+    s_ref++;
+
+    int pw = 280;
+    int ph = 60;
+
+    // Draw the gradients only once
+    if (!s_tmpGfx)
+    {
+        //DBG("generating button gradients");
+
+        s_tmpGfx = new QPixmap(pw, ph);
+        QPainter painter(s_tmpGfx);
+
+        painter.setPen(Qt::NoPen);
+
+        painter.setBrush(Qt::white);
+        painter.drawRect(s_tmpGfx->rect());
+
+        QLinearGradient grad;
+
+        grad.setCoordinateMode(QGradient::ObjectBoundingMode);
+
+        grad.setStart(0, 0);
+        grad.setFinalStop(0, 1);
+
+        grad.setColorAt(0, Qt::red);
+        grad.setColorAt(0.20, QColor(255, 127, 0));
+        grad.setColorAt(0.35, QColor(255, 255, 0));
+        grad.setColorAt(0.5, QColor(0, 255, 0));
+        grad.setColorAt(0.65, QColor(0, 0, 255));
+        grad.setColorAt(0.80, QColor(111, 0, 255));
+        grad.setColorAt(1, QColor(143, 0, 255));
+
+        painter.setBrush(QBrush(grad));
+        painter.drawRect(4, 4, pw-8, ph-8);
+    }
+
+    QPixmap buttonImage = QPixmap(*s_tmpGfx);
+    QPainter painter(&buttonImage);
+
+    QFont font("Arial", 36);
+    font.setLetterSpacing(QFont::PercentageSpacing, 95);
+
+    QFontMetrics metrics(font);
+    QRect bbox = metrics.boundingRect(m_text);
+
+    QPainterPath path;
+
+    int x = (ph - metrics.height()) / 2;
+    path.addText(pw/2-bbox.width()/2, x + metrics.ascent(),  font, m_text);
+
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.setPen(QPen(Qt::black, 3));
+    painter.setBrush(Qt::white);
+    painter.drawPath(path);
+
+    setPixmap(buttonImage);
+}
+
+void AnimatingUiElement::animationFinished()
+{
+    delete m_animation;
+    m_animation = 0;
+    if (m_released)
+    {
+        m_released = false;
+        emit clicked();
+    }
+}