class FrameLessWindowUI(QWidget):
""" 主窗口UI 无边框窗口的基本事件(放大缩小移动等)处理"""
Left, Top, Right, Bottom, LeftTop, RightTop, LeftBottom, RightBottom = range(
8) # 枚举左上右下以及四个定点
MARGIN = 5 # 边缘宽度小用于调整窗口大小
def __init__(self, *args, **kwargs):
super(FrameLessWindowUI, self).__init__(*args, **kwargs)
main_layout = QVBoxLayout()
main_layout.setContentsMargins(
QMargins(self.MARGIN, self.MARGIN, self.MARGIN, self.MARGIN))
main_layout.setSpacing(0)
self.setWindowIcon(QIcon("media/logo.png"))
self.setWindowTitle("分析决策系统")
# 基本事件属性设置
self.setMouseTracking(True)
self._pressed = False
self._direction = None
self._mouse_pos = None
self.title_bar = TitleBarUI(self) # 窗口标题栏
main_layout.addWidget(self.title_bar, alignment=Qt.AlignTop)
self.navigation_bar = NavigationBar(self) # 菜单和用户状态栏
main_layout.addWidget(self.navigation_bar, alignment=Qt.AlignTop)
self.center_widget = QMainWindow() # 模块窗体显示窗口
self.center_widget.setContentsMargins(QMargins(2, 0, 2, 2))
main_layout.addWidget(self.center_widget)
self.setLayout(main_layout)
# 样式,属性,大小设置
self.title_bar.installEventFilter(self) # 安装事件过滤进入标题栏还原鼠标样式
self.navigation_bar.installEventFilter(self)
self.center_widget.installEventFilter(self)
self.setWindowFlags(Qt.FramelessWindowHint | Qt.WindowSystemMenuHint
| Qt.WindowMinimizeButtonHint
| Qt.WindowMaximizeButtonHint)
available_size = QDesktopWidget().availableGeometry(
) # 用户的桌面信息,来改变自身窗体大小
available_width, available_height = available_size.width(
), available_size.height()
self.resize(available_width * 0.75, available_height * 0.8)
self.setMaximumSize(available_width, available_height) # 最大为用户桌面大小
self.setMinimumSize(available_width * 0.5,
available_height * 0.5) # 最小为用户桌面大小的一半
self.setAttribute(Qt.WA_TranslucentBackground, True) # 窗口透明
self.center_widget.setAutoFillBackground(True) # 被窗口透明影响,自动填充
self.center_widget.setObjectName("centerWidget")
self.setStyleSheet(
"#centerWidget{background-color:rgb(255,255,255);border:2px solid rgb(34,102,175);border-top:none;"
"border-bottom-right-radius:5px;border-bottom-left-radius:5px}")
def eventFilter(self, obj, event):
""" 事件过滤器, 用于解决鼠标进入其它控件后还原为标准鼠标样式 """
if isinstance(event, QEnterEvent):
self.setCursor(Qt.ArrowCursor)
self._direction = None # 去除方向
self._pressed = None # 去除按下标记
return super(FrameLessWindowUI, self).eventFilter(obj, event)
def mousePressEvent(self, event):
""" 鼠标按下 """
super(FrameLessWindowUI, self).mousePressEvent(event)
if event.button() == Qt.LeftButton:
self._mouse_pos = event.pos()
self._pressed = True
def mouseReleaseEvent(self, event):
""" 鼠标弹起事件 """
super(FrameLessWindowUI, self).mouseReleaseEvent(event)
self._pressed = False
self._direction = None
# 鼠标移动事件(只有边框MARGIN大小范围有效果,因为其他的是其子控件)(会捕获子控件的鼠标按住移动的事件)
def mouseMoveEvent(self, event):
super(FrameLessWindowUI, self).mouseMoveEvent(event)
pos = event.pos()
pos_x, pos_y = pos.x(), pos.y()
wm, hm = self.width() - self.MARGIN, self.height() - self.MARGIN
# print(wm, hm)
# 窗口最大无需事件
if self.isMaximized() or self.isFullScreen():
self._direction = None
self.setCursor(Qt.ArrowCursor)
return
if event.buttons() == Qt.LeftButton and self._pressed:
self.resize_window(pos)
if pos_x <= self.MARGIN and pos_y <= self.MARGIN:
# 左上角
self._direction = self.LeftTop
self.setCursor(Qt.SizeFDiagCursor)
elif wm <= pos_x <= self.width() and hm <= pos_y <= self.height():
# 右下角
self._direction = self.RightBottom
self.setCursor(Qt.SizeFDiagCursor)
elif wm <= pos_x and pos_y <= self.MARGIN:
# 右上角
self._direction = self.RightTop
self.setCursor(Qt.SizeBDiagCursor)
elif pos_x <= self.MARGIN and hm <= pos_y:
# 左下角
self._direction = self.LeftBottom
self.setCursor(Qt.SizeBDiagCursor)
elif 0 <= pos_x <= self.MARGIN <= pos_y <= hm:
# 左边
self._direction = self.Left
self.setCursor(Qt.SizeHorCursor)
elif wm <= pos_x <= self.width() and self.MARGIN <= pos_y <= hm:
# 右边
self._direction = self.Right
self.setCursor(Qt.SizeHorCursor)
elif wm >= pos_x >= self.MARGIN >= pos_y >= 0:
# 上面
self._direction = self.Top
self.setCursor(Qt.SizeVerCursor)
elif self.MARGIN <= pos_x <= wm and hm <= pos_y <= self.height():
# 下面
self._direction = self.Bottom
self.setCursor(Qt.SizeVerCursor)
def paintEvent(self, event):
""" 由于是全透明背景窗口,重绘事件中绘制透明度为1的难以发现的边框,用于调整窗口大小 """
super(FrameLessWindowUI, self).paintEvent(event)
painter = QPainter(self)
painter.setRenderHint(QPainter.Antialiasing)
painter.setPen(QPen(QColor(255, 255, 255, 1), self.MARGIN * 2))
painter.drawRect(self.rect())
def resize_window(self, pos):
""" 调整窗口大小 """
if self._direction is None:
return
mpos = pos - self._mouse_pos
xPos, yPos = mpos.x(), mpos.y()
geometry = self.geometry()
x, y, w, h = geometry.x(), geometry.y(), geometry.width(
), geometry.height()
if self._direction == self.LeftTop: # 左上角
if w - xPos > self.minimumWidth():
x += xPos
w -= xPos
if h - yPos > self.minimumHeight():
y += yPos
h -= yPos
elif self._direction == self.RightBottom: # 右下角
if w + xPos > self.minimumWidth():
w += xPos
self._mouse_pos = pos
if h + yPos > self.minimumHeight():
h += yPos
self._mouse_pos = pos
elif self._direction == self.RightTop: # 右上角
if h - yPos > self.minimumHeight():
y += yPos
h -= yPos
if w + xPos > self.minimumWidth():
w += xPos
self._mouse_pos.setX(pos.x())
elif self._direction == self.LeftBottom: # 左下角
if w - xPos > self.minimumWidth():
x += xPos
w -= xPos
if h + yPos > self.minimumHeight():
h += yPos
self._mouse_pos.setY(pos.y())
elif self._direction == self.Left: # 左边
if w - xPos > self.minimumWidth():
x += xPos
w -= xPos
else:
return
elif self._direction == self.Right: # 右边
if w + xPos > self.minimumWidth():
w += xPos
self._mouse_pos = pos
else:
return
elif self._direction == self.Top: # 上面
if h - yPos > self.minimumHeight():
y += yPos
h -= yPos
else:
return
elif self._direction == self.Bottom: # 下面
if h + yPos > self.minimumHeight():
h += yPos
self._mouse_pos = pos
else:
return
self.setGeometry(x, y, w, h)
def showMaximized(self):
""" 窗口最大化去除边界MARGIN """
super(FrameLessWindowUI, self).showMaximized()
self.layout().setContentsMargins(0, 0, 0, 0)
def showNormal(self):
""" 还原保留调整大小的边界 """
super(FrameLessWindowUI, self).showNormal()
self.layout().setContentsMargins(self.MARGIN, self.MARGIN, self.MARGIN,
self.MARGIN)
def __init__(self, w_window: QMainWindow) -> None:
super().__init__(w_window)
self._w_window = w_window # Main Qt window.
w_window.installEventFilter(self)
