from PySide6.QtWidgets import QApplication, QPushButton, QMainWindow
from PySide6.QtGui import QPainter, QRadialGradient, QColor, QFont
from PySide6.QtCore import Qt, QRectF, QPropertyAnimation, QEasingCurve
import sys

class GradientButton(QPushButton):
    def __init__(self, text, parent=None):
        super().__init__(text, parent)
        self.setFlat(True)
        self.setFont(QFont("Arial", 14, QFont.Bold))
        self.setMouseTracking(True)
        self.hover = False
        self.animation = QPropertyAnimation(self, b"geometry")
        self.animation.setDuration(100)
        self.animation.setEasingCurve(QEasingCurve.OutQuad)

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)

        rect = self.rect()

        gradient = QRadialGradient(rect.width()/2,rect.top(), rect.width())
        gradient.setColorAt(0, QColor(0, 0, 0))
        gradient.setColorAt(1, QColor(255, 255, 255))

        if self.hover:
            gradient.setColorAt(0, QColor(30, 30, 30))
            gradient.setColorAt(1, QColor(220, 220, 220))

        brush = gradient
        painter.setBrush(brush)
        painter.setPen(Qt.NoPen)

        radius = 10
        painter.drawRoundedRect(QRectF(rect), radius, radius)

        painter.setPen(QColor(0, 0, 0) if not self.hover else QColor(50, 50, 50))
        painter.drawText(rect, Qt.AlignCenter, self.text())

    def enterEvent(self, event):
        self.hover = True
        self.update()
        super().enterEvent(event)

    def leaveEvent(self, event):
        self.hover = False
        self.update()
        super().leaveEvent(event)

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            # 开始缩放动画（缩小）
            geom = self.geometry()
            new_geom = geom.adjusted(5, 5, -5, -5)
            self.animation.stop()
            self.animation.setStartValue(geom)
            self.animation.setEndValue(new_geom)
            self.animation.start()
        super().mousePressEvent(event)

    def mouseReleaseEvent(self, event):
        if event.button() == Qt.LeftButton:
            # 恢复原始大小
            geom = self.geometry()
            new_geom = geom.adjusted(-5, -5, 5, 5)
            self.animation.stop()
            self.animation.setStartValue(geom)
            self.animation.setEndValue(new_geom)
            self.animation.start()
        super().mouseReleaseEvent(event)

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("带动画的渐变按钮示例")
        self.setFixedSize(400, 300)

        self.button = GradientButton("点击我", self)
        self.button.setGeometry(150, 130, 100, 40)
        self.button.clicked.connect(self.on_button_click)

    def on_button_click(self):
        print("按钮被点击了！")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec())