@Swapnil_Shelke
To create those kind of buttons you need more than CSS.
You must go into button's paintEvent and then draw what you need (there are 3 simultaneous animation BTW) :
#include <QtCore/qvariantanimation.h>
#include <QtCore/qvariant.h>
#include <QtWidgets/qabstractbutton.h>
#include <QtWidgets/qapplication.h>
#include <QtWidgets/qlayout.h>
class Animation : public QVariantAnimation {
Q_OBJECT
public:
Animation(QObject *parent = 0) :QVariantAnimation(parent) {
setTargetWidget(qobject_cast<QWidget*>(parent));
setAutoUpdateEnable(true);
}
void setAutoUpdateEnable(bool a) {
if (targetWidget()) {
a ? QObject::connect(this, SIGNAL(valueChanged(QVariant)), targetWidget(), SLOT(update()))
: QObject::disconnect(this, SIGNAL(valueChanged(QVariant)), targetWidget(), SLOT(update()));
}
}
QWidget *targetWidget() const {
return _target;
}
void setTargetWidget(QWidget *w) {
_target = w;
}
QVariant value() const {
return _value;
}
void setValue(const QVariant &variant) {
if (_value == variant) return;
_value = variant;
}
protected:
void updateCurrentValue(const QVariant &value) override {
setValue(value);
}
private:
QVariant _value;
QWidget *_target = nullptr;
};
class SampleButton :public QAbstractButton {
public:
struct ButtonStyle {
qreal border_radius = 4.0;
QColor background_color = QColor("#f4511e");
QColor text_color = QColor("#ffffff");
int font_size = 28;
QString font_family = "Arial";
int width = 200;
int padding = 20;
qreal hover_padding = 25;
int duration = 600;
QIcon icon = QIcon("next.png"); // http://www.flaticon.com/free-icon/double-angle-pointing-to-right_25358 @16x16
qreal pixmap_padding = 20;
};
SampleButton(const QString &text, QWidget *parent = 0) :QAbstractButton(parent), _textEff(new Animation(this)), _pixmapEff0(new Animation(this)), _pixmapEff1(new Animation(this)) {
setFont(QFont(_st.font_family, _st.font_size));
setText(text);
}
QSize sizeHint() const override {
return QSize(_st.width, _st.padding + fontMetrics().height() + _st.padding);
}
protected:
void paintEvent(QPaintEvent *) override {
QPainter p(this);
// draw background
p.setPen(Qt::NoPen);
p.setBrush(_st.background_color);
p.setRenderHint(QPainter::Antialiasing, true);
p.drawRoundedRect(rect(), _st.border_radius, _st.border_radius);
p.setRenderHint(QPainter::Antialiasing, false);
// draw text
if (!text().isEmpty()) {
p.setFont(font());
p.setPen(_st.text_color);
p.setRenderHint(QPainter::TextAntialiasing, true);
p.drawText(QRectF(rect().x() - _textEff->value().toReal(), rect().y(), rect().width(), rect().height()), Qt::AlignCenter, text());
p.setRenderHint(QPainter::TextAntialiasing, false);
}
// draw icon
if (!_st.icon.isNull()) {
p.setRenderHint(QPainter::SmoothPixmapTransform, true);
auto s = _st.icon.availableSizes().at(0);
p.setOpacity(_pixmapEff0->value().toReal());
p.drawPixmap(QPointF(rect().right() - (_st.pixmap_padding * 2) - _pixmapEff1->value().toReal(), rect().center().y() - s.width() / 4), _st.icon.pixmap(s));
}
}
void enterEvent(QEvent *e) {
_textEff->setStartValue(0.0);
_textEff->setEndValue(_st.hover_padding);
_textEff->setDuration(_st.duration);
_textEff->setEasingCurve(QEasingCurve::OutCubic);
_textEff->start();
_pixmapEff0->setStartValue(0.0);
_pixmapEff0->setEndValue(1.0);
_pixmapEff0->setDuration(_st.duration);
_pixmapEff0->setEasingCurve(_textEff->easingCurve());
_pixmapEff0->start();
_pixmapEff1->setStartValue(0.0);
_pixmapEff1->setEndValue(_st.pixmap_padding);
_pixmapEff1->setDuration(_st.duration);
_pixmapEff1->setEasingCurve(_textEff->easingCurve());
_pixmapEff1->start();
QWidget::enterEvent(e);
}
void leaveEvent(QEvent *e) {
_textEff->setStartValue(_st.hover_padding);
_textEff->setEndValue(0.0);
_textEff->setDuration(_st.duration);
_textEff->start();
_pixmapEff0->setStartValue(1.0);
_pixmapEff0->setEndValue(0.0);
_pixmapEff0->setDuration(_st.duration);
_pixmapEff0->start();
_pixmapEff1->setStartValue(_st.pixmap_padding);
_pixmapEff1->setEndValue(0.0);
_pixmapEff1->setDuration(_st.duration);
_pixmapEff1->setEasingCurve(_textEff->easingCurve());
_pixmapEff1->start();
QWidget::leaveEvent(e);
}
private:
ButtonStyle _st;
Animation *_textEff = nullptr;
Animation *_pixmapEff0 = nullptr;
Animation *_pixmapEff1 = nullptr;
};
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QWidget *dialog = new QWidget;
dialog->setWindowFlags(Qt::FramelessWindowHint);
QHBoxLayout _Layout;
dialog->setLayout(&_Layout);
SampleButton *sb = new SampleButton("Hover");
_Layout.addWidget(sb);
dialog->show();
return app.exec();
}
#include "main.moc"
[image: Kgjed.gif]
