Qt第二十七章：QWidget、QMainWindow无边框自定义标题栏并自由移动、缩放、圆角

前提：UI必須采用自适应布局。

自定义组件【直接CV】custom_components.py

# 自定义组件
"""
QCustomTitleBar:自定义标题
QWindowMoveResize：自定义缩放和拖动
"""
import PySide6.QtGui
from PySide6.QtGui import QPainter, QBrush
from PySide6 import QtGui, QtWidgets, QtCore
from PySide6.QtCore import Qt, QSize, QRect
from PySide6.QtWidgets import QPushButton, QLabel, QWidget, QProgressBar, QHBoxLayout, QDialog# 自定义标题栏
class QCustomTitleBar:def __init__(self, window: QtWidgets):self.window = window# 默认标题栏高度 必须设self.DEFAULT_TITILE_BAR_HEIGHT = 40# 存储父类的双击事件self.mouseDoubleClickEvent_parent = self.window.mouseDoubleClickEvent# 将本类的双击事件赋值给将父类的双击事件self.window.mouseDoubleClickEvent = self.mouseDoubleClickEvent# 存储父类的窗口大小改变事件self.resizeEvent_parent = self.window.resizeEvent# 将本类的窗口大小改变事件赋值给将父类的窗口大小改变事件self.window.resizeEvent = self.resizeEvent# 设置ui文件里main_layout上边距，以免遮挡标题栏self.window.setContentsMargins(0, self.DEFAULT_TITILE_BAR_HEIGHT, 0, 0)# 1.设置无边框 和 透明背景 无边框必须设置全，不然会导致点击任务栏不能最小化窗口self.window.setWindowFlags(Qt.Window| Qt.FramelessWindowHint| Qt.WindowSystemMenuHint| Qt.WindowMinimizeButtonHint| Qt.WindowMaximizeButtonHint)# self.window.setAttribute(Qt.WA_TranslucentBackground)# 2.添加自定义的标题栏到最顶部self.title = QLabel("", self.window)# 3.设置标题栏样式self.setStyle()# 4.添加按钮# 添加关闭按钮self.close_btn = QPushButton("", self.window)self.close_btn.setGeometry(self.window.width() - 33, 10, 20, 20)# 添加最大化按钮self.max_btn = QPushButton("", self.window)self.max_btn.setGeometry(self.window.width() - 66, 10, 20, 20)# 添加最小化按钮self.min_btn = QPushButton("", self.window)self.min_btn.setGeometry(self.window.width() - 99, 10, 20, 20)# 设置三个按钮的鼠标样式self.close_btn.setCursor(Qt.PointingHandCursor)self.max_btn.setCursor(Qt.PointingHandCursor)self.min_btn.setCursor(Qt.PointingHandCursor)# 设置三个按钮的样式self.close_btn.setStyleSheet("QPushButton{border-image:url('./images/close.png');background:#ff625f;border-radius:10px;}""QPushButton:hover{background:#eb4845;}")self.max_btn.setStyleSheet("QPushButton{border-image:url('./images/max.png');background:#ffbe2f;border-radius:10px;}""QPushButton:hover{background:#ecae27;}")self.min_btn.setStyleSheet("QPushButton{border-image:url('./images/min.png');background:#29c941;border-radius:10px;}""QPushButton:hover{background:#1ac033;}")# 5.添加工具栏按钮事件# 关闭按钮点击绑定窗口关闭事件self.close_btn.pressed.connect(self.window.close)# 最大化按钮绑定窗口最大化事件self.max_btn.pressed.connect(self.setMaxEvent)# 最小化按钮绑定窗口最小化事件self.min_btn.pressed.connect(self.window.showMinimized)# 6.记录全屏窗口的大小-ps非常有用self.window_max_size = None# 7.设置标题栏鼠标跟踪 鼠标移入触发，不设置，移入标题栏不触发self.title.setMouseTracking(True)def setMaxEvent(self, flag=False):"""@description  最大化按钮绑定窗口最大化事件和事件 拿出来是因为拖动标题栏时需要恢复界面大小@param flag 是否是拖动标题栏 bool@return"""if flag:if self.window.isMaximized():self.window.showNormal()self.max_btn.setStyleSheet("QPushButton{border-image:url('./images/max.png');background:#ffbe2f;border-radius:10px;}""QPushButton:hover{background:#ecae27;}")return self.window_max_sizereturn Noneelse:if self.window.isMaximized():self.window.showNormal()self.max_btn.setStyleSheet("QPushButton{border-image:url('./images/max.png');background:#ffbe2f;border-radius:10px;}""QPushButton:hover{background:#ecae27;}")else:self.window.showMaximized()self.max_btn.setStyleSheet("QPushButton{border-image:url('./images/restore.png');background:#ffbe2f;border-radius:10px;}""QPushButton:hover{background:#ecae27;}")# 记录最大化窗口的大小  用于返回最大化时拖动窗口恢复前的大小 这个程序循环帧会取不到恢复前的宽度self.window_max_size = QSize(self.window.width(), self.window.height())def setStyle(self, style: str = ""):"""@description 设置自定义标题栏样式@param@return"""# 想要边框 加上border:1px solid #cccccc;DEFAULT_STYLE = """background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1,stop:0 #fafafa,stop:1 #d1d1d1);color:#333333;padding:10px;border:1px solid #c6c6c6;border-top-left-radius:4px;border-top-right-radius:4px;"""self.title.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)# 设置样式self.title.setStyleSheet(DEFAULT_STYLE if not style else DEFAULT_STYLE + style)# 设置大小self.title.setGeometry(0, 0, self.window.width(), self.DEFAULT_TITILE_BAR_HEIGHT)def mouseDoubleClickEvent(self, a0: QtGui.QMouseEvent) -> None:"""@description 鼠标双击事件@param@return"""# 如果双击的是鼠标左键 且在标题栏范围内 则放大缩小窗口if a0.button() == Qt.MouseButton.LeftButton and a0.position().y() < self.title.height():self.setMaxEvent()return self.mouseDoubleClickEvent_parent(a0)def resizeEvent(self, a0: QtGui.QResizeEvent) -> None:"""@description  窗口缩放事件@param@return"""# 最大化最小化的时候，需要去改变按钮组位置self.close_btn.move(self.window.width() - 33, 10)self.max_btn.move(self.window.width() - 66, 10)self.min_btn.move(self.window.width() - 99, 10)self.title.resize(self.window.width(), self.DEFAULT_TITILE_BAR_HEIGHT)return self.resizeEvent_parent(a0)# 实现拖动和缩放Widget
class QWindowMoveResizeWidget(QWidget):def __init__(self, parent=None):super(QWindowMoveResizeWidget, self).__init__(parent)# 1.设置无边框 和 透明背景 无边框必须设置全，不然会导致点击任务栏不能最小化窗口self.setWindowFlags(Qt.Window| Qt.FramelessWindowHint| Qt.WindowSystemMenuHint| Qt.WindowMinimizeButtonHint| Qt.WindowMaximizeButtonHint)# 设置窗体透明self.setAttribute(Qt.WA_TranslucentBackground)# 默认标题栏高度 必须设self.DEFAULT_TITILE_BAR_HEIGHT = 40# 鼠标缩放窗口最小宽度，必须设self.MIN_WINDOW_WIDTH = 10self.MIN_WINDOW_HEIGHT = 10# 鼠标拖动窗口的标识self.m_flag = False# 初始化鼠标拖动标题栏标志self.drag_flag = False# 记录按下时窗口坐标， 这个用于窗口移动self.win_x = 0self.win_y = 0# 记录按下时鼠标坐标，这个用于计算鼠标移动的距离self.mouse_x = 0self.mouse_y = 0# 记录鼠标移入的拖动区域，共8种区域 左上 左 左下 上 下 右上 右 右下self.left_up = Noneself.left = Noneself.left_down = Noneself.up = Noneself.down = Noneself.right_up = Noneself.right = Noneself.right_down = None# 设置为True则mouseMoveEvent事件不需要按下也能触发,不然要按着鼠标左键或右键才能触发self.setMouseTracking(True)# 设置子类的mousetrack# self.centralwidget.setMouseTracking(True)# 记录按下时窗口的大小，用于计算鼠标相对于窗口移动的距离，用于缩放self.win_w = 0self.win_h = 0# 初始化鼠标缩放标志self.move_left_up_flag = Falseself.move_left_flag = Falseself.move_left_down_flag = Falseself.move_up_flag = Falseself.move_down_flag = Falseself.move_right_up_flag = Falseself.move_right_flag = Falseself.move_right_down_flag = False# 设置边框圆角def paintEvent(self, event: PySide6.QtGui.QPaintEvent) -> None:painter = QPainter(self)painter.setRenderHint(QPainter.RenderHint.Antialiasing)  # 设置抗锯齿，不然边框会有明显锯齿painter.setBrush(Qt.white)  # 设置窗体颜色painter.drawRoundedRect(self.rect(), 10, 10)super().paintEvent(event)def resizeEvent(self, a0: QtGui.QResizeEvent) -> None:"""@description  窗口缩放事件@param@return"""# 最大化最小化的时候，需要去改变按钮组位置# self.titleBar.close_btn.move(self.width() - 33, 10)# self.titleBar.max_btn.move(self.width() - 66, 10)# self.titleBar.min_btn.move(self.width() - 99, 10)# self.titleBar.title.resize(self.width(), DEFAULT_TITILE_BAR_HEIGHT)# 记录鼠标移入的拖动区域，共8种区域self.left_up = QRect(0, 0, 10, 10)self.left = QRect(0, 10, 10, self.height() - 20)self.left_down = QRect(0, self.height() - 10, 10, 10)self.up = QRect(10, 0, self.width() - 20, 10)self.down = QRect(10, self.height() - 10, self.width() - 20, 10)self.right_up = QRect(self.width() - 10, 0, 10, 10)self.right = QRect(self.width() - 10, 10, 10, self.height() - 20)self.right_down = QRect(self.width() - 10, self.height() - 10, 10, 10)return super().resizeEvent(a0)def mousePressEvent(self, a0: QtGui.QMouseEvent) -> None:"""拖动窗口"""if a0.button() == QtCore.Qt.LeftButton and self.isMaximized() == False and self.cursor().shape() == QtGui.QCursor(QtCore.Qt.ArrowCursor).shape():self.m_flag = Trueself.m_Position = a0.globalPosition().toPoint() - self.pos()  # 获取鼠标相对窗口的位置a0.accept()self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标else:"""@description 鼠标按下事件@param@return"""# 记录按下时窗口坐标， 这个用于窗口移动self.win_x = self.x()self.win_y = self.y()# 记录按下时鼠标坐标，这个用于计算鼠标移动的距离self.mouse_x = a0.globalPosition().x()self.mouse_y = a0.globalPosition().y()# 记录按下时窗口的大小，用于计算鼠标相对于窗口移动的距离，用于缩放self.win_w = self.width()self.win_h = self.height()if not self.isMaximized():# 如果按下的是鼠标左键if a0.button() == Qt.MouseButton.LeftButton and self.left_up.contains(a0.position().x(),a0.position().y()):self.move_left_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.left.contains(a0.position().x(),a0.position().y()):self.move_left_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.left_down.contains(a0.position().x(), a0.position().y()):self.move_left_down_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.up.contains(a0.position().x(), a0.position().y()):self.move_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.down.contains(a0.position().x(),a0.position().y()):self.move_down_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right_up.contains(a0.position().x(), a0.position().y()):self.move_right_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right.contains(a0.position().x(),a0.position().y()):self.move_right_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right_down.contains(a0.position().x(), a0.position().y()):self.move_right_down_flag = Truereturn super().mousePressEvent(a0)def mouseMoveEvent(self, a0: QtGui.QMouseEvent) -> None:"""拖动窗口"""if QtCore.Qt.LeftButton and self.m_flag and self.cursor().shape() == QtGui.QCursor(QtCore.Qt.OpenHandCursor).shape():self.move(a0.globalPosition().toPoint() - self.m_Position)  # 更改窗口位置a0.accept()else:"""@description 鼠标按下移动事件@param@return"""# 获取移动后鼠标的位置mouse_move_x = a0.globalPosition().x()mouse_move_y = a0.globalPosition().y()# 计算移动的距离offset_x = mouse_move_x - self.mouse_xoffset_y = mouse_move_y - self.mouse_y# 移动鼠标时设置鼠标样式if not self.isMaximized():# 不是拖动的时才可能是缩放状态if not self.drag_flag:# 左上if self.left_up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeFDiagCursor)# 左elif self.left.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeHorCursor)# 左下elif self.left_down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeBDiagCursor)# 上elif self.up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeVerCursor)# 下elif self.down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeVerCursor)# 右上elif self.right_up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeBDiagCursor)# 右elif self.right.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeHorCursor)# 右下elif self.right_down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeFDiagCursor)else:self.setCursor(Qt.ArrowCursor)else:self.setCursor(Qt.ArrowCursor)else:self.setCursor(Qt.ArrowCursor)# 如果按下且在左上角范围内则缩放（其他代码参考左上）if self.move_left_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeFDiagCursor)resize_w = self.win_w - offset_xresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.win_y + offset_y)# 缩放宽度等于最小宽度，高度鼠标跟随if resize_w == self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.x(), self.win_y + offset_y)# 缩放高度等于最小高度，宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h == self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 如果按下且在左边范围内则缩放elif self.move_left_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeHorCursor)resize_w = self.win_w - offset_xresize_h = self.win_h# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_w# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# 只要宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH:self.move(self.win_x + offset_x, self.win_y)# 如果按下且在左下角范围内则缩放elif self.move_left_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeBDiagCursor)resize_w = self.win_w - offset_xresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 缩放高度等于最小高度，宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h == self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 如果按下且在上边范围内则缩放elif self.move_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeVerCursor)resize_w = self.win_wresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# 只要高度鼠标跟随if resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x, self.win_y + offset_y)# 如果按下且在下边范围内则缩放elif self.move_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeVerCursor)resize_w = self.win_wresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下且在右上角范围内则缩放elif self.move_right_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeBDiagCursor)resize_w = self.win_w + offset_xresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x, self.win_y + offset_y)# 缩放宽度等于最小宽度，高度鼠标跟随if resize_w == self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.x(), self.win_y + offset_y)# 如果按下且在右边范围内则缩放elif self.move_right_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeHorCursor)resize_w = self.win_w + offset_xresize_h = self.win_h# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_w# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下且在右下角范围内则缩放elif self.move_right_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeFDiagCursor)resize_w = self.win_w + offset_xresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下才能移动elif self.drag_flag:# 设置窗口移动的距离self.move(self.win_x + offset_x, self.win_y + offset_y)return super().mouseMoveEvent(a0)def mouseReleaseEvent(self, a0: QtGui.QMouseEvent) -> None:self.m_flag = Falseself.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))"""@description 鼠标按下松开事件@param@return"""self.drag_flag = Falseself.move_left_up_flag = Falseself.move_left_flag = Falseself.move_left_down_flag = Falseself.move_up_flag = Falseself.move_down_flag = Falseself.move_right_up_flag = Falseself.move_right_flag = Falseself.move_right_down_flag = Falseself.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))return super().mouseReleaseEvent(a0)# 实现拖动和缩放Dialog
class QWindowMoveResizeDialog(QDialog):def __init__(self, parent=None):super(QWindowMoveResizeDialog, self).__init__(parent)# 1.设置无边框 和 透明背景 无边框必须设置全，不然会导致点击任务栏不能最小化窗口self.setWindowFlags(Qt.Window| Qt.FramelessWindowHint| Qt.WindowSystemMenuHint| Qt.WindowMinimizeButtonHint| Qt.WindowMaximizeButtonHint)# 窗体透明self.setAttribute(Qt.WA_TranslucentBackground)# 默认标题栏高度 必须设self.DEFAULT_TITILE_BAR_HEIGHT = 40# 鼠标缩放窗口最小宽度，必须设self.MIN_WINDOW_WIDTH = 10self.MIN_WINDOW_HEIGHT = 10# 鼠标拖动窗口的标识self.m_flag = False# 初始化鼠标拖动标题栏标志self.drag_flag = False# 记录按下时窗口坐标， 这个用于窗口移动self.win_x = 0self.win_y = 0# 记录按下时鼠标坐标，这个用于计算鼠标移动的距离self.mouse_x = 0self.mouse_y = 0# 记录鼠标移入的拖动区域，共8种区域 左上 左 左下 上 下 右上 右 右下self.left_up = Noneself.left = Noneself.left_down = Noneself.up = Noneself.down = Noneself.right_up = Noneself.right = Noneself.right_down = None# 设置为True则mouseMoveEvent事件不需要按下也能触发,不然要按着鼠标左键或右键才能触发self.setMouseTracking(True)# 设置子类的mousetrack# self.centralwidget.setMouseTracking(True)# 记录按下时窗口的大小，用于计算鼠标相对于窗口移动的距离，用于缩放self.win_w = 0self.win_h = 0# 初始化鼠标缩放标志self.move_left_up_flag = Falseself.move_left_flag = Falseself.move_left_down_flag = Falseself.move_up_flag = Falseself.move_down_flag = Falseself.move_right_up_flag = Falseself.move_right_flag = Falseself.move_right_down_flag = False# 设置边框圆角def paintEvent(self, event: PySide6.QtGui.QPaintEvent) -> None:painter = QPainter(self)painter.setRenderHint(QPainter.RenderHint.Antialiasing)  # 设置抗锯齿，不然边框会有明显锯齿painter.setBrush(Qt.white)  # 设置窗体颜色painter.drawRoundedRect(self.rect(), 10, 10)super().paintEvent(event)def resizeEvent(self, a0: QtGui.QResizeEvent) -> None:"""@description  窗口缩放事件@param@return"""# 最大化最小化的时候，需要去改变按钮组位置# self.titleBar.close_btn.move(self.width() - 33, 10)# self.titleBar.max_btn.move(self.width() - 66, 10)# self.titleBar.min_btn.move(self.width() - 99, 10)# self.titleBar.title.resize(self.width(), DEFAULT_TITILE_BAR_HEIGHT)# 记录鼠标移入的拖动区域，共8种区域self.left_up = QRect(0, 0, 10, 10)self.left = QRect(0, 10, 10, self.height() - 20)self.left_down = QRect(0, self.height() - 10, 10, 10)self.up = QRect(10, 0, self.width() - 20, 10)self.down = QRect(10, self.height() - 10, self.width() - 20, 10)self.right_up = QRect(self.width() - 10, 0, 10, 10)self.right = QRect(self.width() - 10, 10, 10, self.height() - 20)self.right_down = QRect(self.width() - 10, self.height() - 10, 10, 10)return super().resizeEvent(a0)def mousePressEvent(self, a0: QtGui.QMouseEvent) -> None:"""拖动窗口"""if a0.button() == QtCore.Qt.LeftButton and self.isMaximized() == False and self.cursor().shape() == QtGui.QCursor(QtCore.Qt.ArrowCursor).shape():self.m_flag = Trueself.m_Position = a0.globalPosition().toPoint() - self.pos()  # 获取鼠标相对窗口的位置a0.accept()self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标else:"""@description 鼠标按下事件@param@return"""# 记录按下时窗口坐标， 这个用于窗口移动self.win_x = self.x()self.win_y = self.y()# 记录按下时鼠标坐标，这个用于计算鼠标移动的距离self.mouse_x = a0.globalPosition().x()self.mouse_y = a0.globalPosition().y()# 记录按下时窗口的大小，用于计算鼠标相对于窗口移动的距离，用于缩放self.win_w = self.width()self.win_h = self.height()if not self.isMaximized():# 如果按下的是鼠标左键if a0.button() == Qt.MouseButton.LeftButton and self.left_up.contains(a0.position().x(),a0.position().y()):self.move_left_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.left.contains(a0.position().x(),a0.position().y()):self.move_left_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.left_down.contains(a0.position().x(), a0.position().y()):self.move_left_down_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.up.contains(a0.position().x(), a0.position().y()):self.move_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.down.contains(a0.position().x(),a0.position().y()):self.move_down_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right_up.contains(a0.position().x(), a0.position().y()):self.move_right_up_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right.contains(a0.position().x(),a0.position().y()):self.move_right_flag = Trueif a0.button() == Qt.MouseButton.LeftButton and self.right_down.contains(a0.position().x(), a0.position().y()):self.move_right_down_flag = Truereturn super().mousePressEvent(a0)def mouseMoveEvent(self, a0: QtGui.QMouseEvent) -> None:"""拖动窗口"""if QtCore.Qt.LeftButton and self.m_flag and self.cursor().shape() == QtGui.QCursor(QtCore.Qt.OpenHandCursor).shape():self.move(a0.globalPosition().toPoint() - self.m_Position)  # 更改窗口位置a0.accept()else:"""@description 鼠标按下移动事件@param@return"""# 获取移动后鼠标的位置mouse_move_x = a0.globalPosition().x()mouse_move_y = a0.globalPosition().y()# 计算移动的距离offset_x = mouse_move_x - self.mouse_xoffset_y = mouse_move_y - self.mouse_y# 移动鼠标时设置鼠标样式if not self.isMaximized():# 不是拖动的时才可能是缩放状态if not self.drag_flag:# 左上if self.left_up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeFDiagCursor)# 左elif self.left.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeHorCursor)# 左下elif self.left_down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeBDiagCursor)# 上elif self.up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeVerCursor)# 下elif self.down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeVerCursor)# 右上elif self.right_up.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeBDiagCursor)# 右elif self.right.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeHorCursor)# 右下elif self.right_down.contains(a0.position().x(), a0.position().y()):self.setCursor(Qt.SizeFDiagCursor)else:self.setCursor(Qt.ArrowCursor)else:self.setCursor(Qt.ArrowCursor)else:self.setCursor(Qt.ArrowCursor)# 如果按下且在左上角范围内则缩放（其他代码参考左上）if self.move_left_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeFDiagCursor)resize_w = self.win_w - offset_xresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.win_y + offset_y)# 缩放宽度等于最小宽度，高度鼠标跟随if resize_w == self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.x(), self.win_y + offset_y)# 缩放高度等于最小高度，宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h == self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 如果按下且在左边范围内则缩放elif self.move_left_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeHorCursor)resize_w = self.win_w - offset_xresize_h = self.win_h# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_w# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# 只要宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH:self.move(self.win_x + offset_x, self.win_y)# 如果按下且在左下角范围内则缩放elif self.move_left_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeBDiagCursor)resize_w = self.win_w - offset_xresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 缩放高度等于最小高度，宽度鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h == self.MIN_WINDOW_HEIGHT:self.move(self.win_x + offset_x, self.y())# 如果按下且在上边范围内则缩放elif self.move_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeVerCursor)resize_w = self.win_wresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# 只要高度鼠标跟随if resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x, self.win_y + offset_y)# 如果按下且在下边范围内则缩放elif self.move_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeVerCursor)resize_w = self.win_wresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下且在右上角范围内则缩放elif self.move_right_up_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeBDiagCursor)resize_w = self.win_w + offset_xresize_h = self.win_h - offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 设置窗口移动,需要鼠标跟随# x y 都要鼠标跟随if resize_w != self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.win_x, self.win_y + offset_y)# 缩放宽度等于最小宽度，高度鼠标跟随if resize_w == self.MIN_WINDOW_WIDTH and resize_h != self.MIN_WINDOW_HEIGHT:self.move(self.x(), self.win_y + offset_y)# 如果按下且在右边范围内则缩放elif self.move_right_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeHorCursor)resize_w = self.win_w + offset_xresize_h = self.win_h# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_w# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下且在右下角范围内则缩放elif self.move_right_down_flag:# 拖动的时候也要设置一下形状self.setCursor(Qt.SizeFDiagCursor)resize_w = self.win_w + offset_xresize_h = self.win_h + offset_y# 如果缩放后的尺寸小于最小尺寸则窗口不能缩放了resize_w = self.MIN_WINDOW_WIDTH if resize_w < self.MIN_WINDOW_WIDTH else resize_wresize_h = self.MIN_WINDOW_HEIGHT if resize_h < self.MIN_WINDOW_HEIGHT else resize_h# 设置窗口缩放尺寸self.resize(resize_w, resize_h)# 如果按下才能移动elif self.drag_flag:# 设置窗口移动的距离self.move(self.win_x + offset_x, self.win_y + offset_y)return super().mouseMoveEvent(a0)def mouseReleaseEvent(self, a0: QtGui.QMouseEvent) -> None:self.m_flag = Falseself.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))"""@description 鼠标按下松开事件@param@return"""self.drag_flag = Falseself.move_left_up_flag = Falseself.move_left_flag = Falseself.move_left_down_flag = Falseself.move_up_flag = Falseself.move_down_flag = Falseself.move_right_up_flag = Falseself.move_right_flag = Falseself.move_right_down_flag = Falseself.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))return super().mouseReleaseEvent(a0)

使用实例
①QWidget使用示例
UI文件（转成py文件）

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>Form</class><widget class="QWidget" name="Form"><property name="geometry"><rect><x>0</x><y>0</y><width>400</width><height>300</height></rect></property><property name="windowTitle"><string>Form</string></property><layout class="QHBoxLayout" name="horizontalLayout_2"><item><layout class="QVBoxLayout" name="verticalLayout"><item><layout class="QHBoxLayout" name="horizontalLayout"><item><widget class="QLineEdit" name="lineEdit"/></item><item><widget class="QPushButton" name="pushButton"><property name="text"><string>PushButton</string></property></widget></item></layout></item><item><widget class="QTextEdit" name="textEdit"/></item></layout></item></layout></widget><resources/><connections/>
</ui>

from PySide6.QtWidgets import QApplication, QWidgetfrom custom_components import QWindowMoveResizeWidget, QCustomTitleBar
from ui_widget_test import Ui_Formclass TestWindow(QWindowMoveResizeWidget, Ui_Form):def __init__(self, parent=None):super(TestWindow, self).__init__(parent)self.setupUi(self)# 自定义标题栏QCustomTitleBar(self)if __name__ == "__main__":app = QApplication([])window = TestWindow()window.show()app.exec()

②QMainWindow使用示例
UI文件（转成py文件）

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0"><class>MainWindow</class><widget class="QMainWindow" name="MainWindow"><property name="geometry"><rect><x>0</x><y>0</y><width>641</width><height>444</height></rect></property><property name="windowTitle"><string>MainWindow</string></property><widget class="QWidget" name="centralwidget"><layout class="QHBoxLayout" name="horizontalLayout_2"><item><layout class="QVBoxLayout" name="verticalLayout"><item><layout class="QHBoxLayout" name="horizontalLayout"><item><widget class="QLineEdit" name="lineEdit"/></item><item><widget class="QPushButton" name="pushButton"><property name="text"><string>PushButton</string></property></widget></item></layout></item><item><widget class="QTextEdit" name="textEdit"/></item></layout></item></layout></widget><widget class="QMenuBar" name="menubar"><property name="geometry"><rect><x>0</x><y>0</y><width>641</width><height>23</height></rect></property><widget class="QMenu" name="menu"><property name="title"><string>菜单</string></property></widget><addaction name="menu"/></widget><widget class="QStatusBar" name="statusbar"/></widget><resources/><connections/>
</ui>

from PySide6 import QtCore, QtGui
from PySide6.QtWidgets import QApplication, QMainWindowfrom custom_components import QCustomTitleBar
from ui_main_window_test import Ui_MainWindowclass TestWindow(QMainWindow, Ui_MainWindow):def __init__(self, parent=None):super(TestWindow, self).__init__(parent)self.setupUi(self)# 自定义标题栏QCustomTitleBar(self)def mousePressEvent(self, event):if event.button() == QtCore.Qt.LeftButton and self.isMaximized() == False:self.m_flag = Trueself.m_Position = event.globalPosition().toPoint() - self.pos()  # 获取鼠标相对窗口的位置event.accept()self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标def mouseMoveEvent(self, mouse_event):if QtCore.Qt.LeftButton and self.m_flag:self.move(mouse_event.globalPosition().toPoint() - self.m_Position)  # 更改窗口位置mouse_event.accept()def mouseReleaseEvent(self, mouse_event):self.m_flag = Falseself.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))if __name__ == "__main__":app = QApplication([])window = TestWindow()window.show()app.exec()

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Qt第二十七章：QWidget、QMainWindow无边框自定义标题栏并自由移动、缩放、圆角

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