Feeding_control_system/view/widgets/circular_button.py

from PySide6.QtWidgets import QPushButton
from PySide6.QtGui import QPainter, QFont, Qt, QPixmap, QColor
from PySide6.QtCore import QRectF
import resources.resources_rc
from utils.image_paths import ImagePaths

# 用于 开、拱 等功能按钮
class CircularButton(QPushButton):
    """自定义圆形按钮"""
    def __init__(self, text, parent=None):
        super().__init__(text, parent)
        # 设置按钮大小为41x41（与图片尺寸一致）
        self.setFixedSize(41, 41)
        
        # 加载背景图片
        self.normal_pixmap = QPixmap(ImagePaths.ROUND_BTN_BG1)  # 正常状态图片 需要修改为实际的路径
        self.hover_pixmap = QPixmap(ImagePaths.ROUND_BTN_BG2)   # hover状态图片 需要修改为实际的路径
        
        # 确保图片加载成功（可选：添加错误处理）
        if self.normal_pixmap.isNull():
            print("警告：圆形按钮背景1.png 加载失败")
        if self.hover_pixmap.isNull():
            print("警告：圆形按钮背景2.png 加载失败")
        
        # 字体初始化状态和颜色
        self.is_hover = False
        self.normal_text_color = QColor(6, 224, 239) 
        self.hover_text_color = QColor(3, 20, 100)  

        # 设置按钮手势
        self.setCursor(Qt.PointingHandCursor)
        
        # 去除默认样式
        self.setStyleSheet("background: transparent; border: none;")

    def enterEvent(self, event):
        self.is_hover = True
        self.update()  # 触发重绘
        super().enterEvent(event)

    def leaveEvent(self, event):
        self.is_hover = False
        self.update()  # 触发重绘
        super().leaveEvent(event)

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.RenderHint.Antialiasing)  # 抗锯齿
        
        # 绘制对应状态的背景图片
        current_pixmap = self.hover_pixmap if self.is_hover else self.normal_pixmap
        if not current_pixmap.isNull():
            # 绘制图片并适应按钮大小（保持圆形）
            painter.drawPixmap(self.rect(), current_pixmap)
        
        # 绘制文字
        # painter.setPen(self.hover_text_color if self.is_hover else self.normal_text_color)
        # print("self.is_hover: ", self.is_hover)
        if self.is_hover: # 根据鼠标是否解除修改字体颜色
            painter.setPen(self.hover_text_color)
        else:
            painter.setPen( self.normal_text_color)

        painter.setFont(QFont("Arial", 12, QFont.Weight.Bold))
        # 在按钮中心绘制文字
        painter.drawText(self.rect(), Qt.AlignmentFlag.AlignCenter, self.text())