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OcGui.py
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OcGui.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""基于 PyQt5 的 GUI.
classes:
class OTitleBar(QWidget)
自定义标题栏,不可单独使用.
class OWindow(QMainWindow)
自定义窗口,内置 自定义标题栏及 qss;
1. 实现了自定义标题栏的主窗口,包含以下功能:
a. 窗口最大化、最小化、关闭;
b. 窗口移动;
c. 拖动改变窗口大小;
2. 基于 requests.get 实现了从互联网及本地加载背景图片.
"""
from PyQt5.QtCore import Qt, QObject, QEvent, QSize, QRect
from PyQt5.QtGui import QIcon, QPixmap, QPalette, QBrush
from PyQt5.QtWidgets import *
from requests import get
from os.path import exists
import logging
from PyOc import OcGuiRes
__auth__ = 'one-ccs'
logging.basicConfig(format='%(levelname)s: %(message)s')
class OTitleBar(QWidget):
"""自定义标题栏
实现了最大化与最小化"""
def __init__(self, parent):
super().__init__()
# 设置尺寸策略
self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
self.setFixedHeight(36)
# ~ self.setAttribute(Qt.WA_TransparentForMouseEvents) # 鼠标点击穿透
self._parent = parent # 父(主)窗口
self._menu_button = None # 菜单按钮(QWidget)
self._skin_button = None # 换肤按钮(QWidget)
self._title_icon = None # 图标(QLabel)
self.title_label = None # 标题(QLabel)
self._min_button = None # 最小化按钮(QWidget)
self._max_button = None # 最大化按钮(QWidget)
self._close_button = None # 关闭按钮(QWidget)
self._central_layout = None # 主布局(水平)
self._menu_icon = None # 菜单图标
self._skin_icon = None # 换肤图标
self._min_icon = None # 最小化按钮图标
self._max_icon = None # 最大化按钮图标
self._restore_icon = None # 最大化按钮恢复图标
self._close_icon = None # 关闭按钮图标
self._series = 'black' # 图标样式(默认黑色)
# 初始化标题栏属性
self.init_titlebar()
# 设置最窄宽度
self.setMinimumWidth(self._title_icon.width() * 13)
# 去除布局及控件间的间隔及边距
set_all_gap(self._central_layout, left=8)
self.setMouseTracking(True)
self._title_icon.setMouseTracking(True)
self.title_label.setMouseTracking(True)
def init_titlebar(self):
"""初始化标题栏属性"""
# 添加标题控件
self._title_icon = QLabel()
self.title_label = QLabel()
self._min_button = QPushButton()
self._max_button = QPushButton()
self._close_button = QPushButton()
self._title_icon.setObjectName('OTitleIcon')
self.title_label.setObjectName('OTitleLabel')
self._min_button.setObjectName('OMinButton')
self._max_button.setObjectName('OMaxButton')
self._close_button.setObjectName('OCloseButton')
# 设置 icon
set_icon(self._title_icon, ':/res/images/one_ccs.ico')
self._load_icon()
# 设置 icon 宽度
self._title_icon.setFixedHeight(24)
self._title_icon.setFixedWidth(24)
# 设置标题控件策略
expanding = QSizePolicy.Expanding
self.title_label.setSizePolicy(expanding, expanding)
# 设置窗口主布局,并放入主容器中
self._central_layout = QHBoxLayout(self)
# 把控件添加进标题栏布局
self._central_layout.addWidget(self._title_icon, alignment=Qt.AlignVCenter)
self._central_layout.addWidget(self.title_label, alignment=Qt.AlignVCenter)
self._central_layout.addWidget(self._min_button, alignment=Qt.AlignVCenter)
self._central_layout.addWidget(self._max_button, alignment=Qt.AlignVCenter)
self._central_layout.addWidget(self._close_button, alignment=Qt.AlignVCenter)
# 链接信号/槽
self._min_button.clicked.connect(self.min_button_click)
self._max_button.clicked.connect(self.max_button_click)
self._close_button.clicked.connect(self.close_button_click)
def set_menu_icon(self, icon):
"""设置菜单按钮图标"""
if not isinstance(icon, QPixmap):
icon = QPixmap(icon)
icon = icon.scaled(width, height, Qt.KeepAspectRatio, Qt.SmoothTransformation)
self._menu_icon = QIcon(QPixmap(icon))
self._menu_button.setPixmap()
self._menu_button.setIcon(self._menu_icon)
def set_skin_icon(self, icon):
"""设置最换肤按钮图标"""
self._skin_icon = QIcon(QPixmap(icon))
self._skin_button.setIcon(self._skin_icon)
def set_min_icon(self, icon):
"""设置最小化按钮图标"""
self._min_icon = QIcon(QPixmap(icon))
self._min_button.setIcon(self._min_icon)
def set_max_icon(self, icon):
"""设置最大化按钮图标"""
self._max_icon = QIcon(QPixmap(icon))
self._max_button.setIcon(self._max_icon)
def set_restore_icon(self, icon):
"""设置恢复按钮图标"""
self._restore_icon = QIcon(QPixmap(icon))
def set_close_icon(self, icon):
"""设置关闭按钮图标"""
self._close_icon = QIcon(QPixmap(icon))
self._close_button.setIcon(self._close_icon)
def set_icon_series(self, series):
"""设置标题图标系列(黑/白)"""
if series == 'black' or series == 'white':
self._series = series
self._load_icon()
def add_menu_button(self):
"""添加菜单按钮"""
self._menu_button = QPushButton()
self.setObjectName('OMenuButton')
self._menu_button.installEventFilter(self._parent)
if self._series == 'black':
self.set_menu_icon(':/res/images/title_menu.ico')
elif self._series == 'white':
self.set_menu_icon(':/res/images/title_menu_w.ico')
self._central_layout.addWidget(self._menu_button)
# 重新放置主按钮
self._central_layout.addWidget(self._min_button)
self._central_layout.addWidget(self._max_button)
self._central_layout.addWidget(self._close_button)
return self._menu_button
def add_skin_button(self):
"""添加换肤按钮"""
self._skin_button = QPushButton()
self._skin_button.setObjectName('OSkinButton')
self._skin_button.installEventFilter(self._parent)
if self._series == 'black':
self.set_skin_icon(':/res/images/title_skin.ico')
elif self._series == 'white':
self.set_skin_icon(':/res/images/title_skin_w.ico')
# 设置图标大小
# ~ self._skin_button.setIconSize(QSize(22, 22))
self._central_layout.addWidget(self._skin_button)
# 重新放置主按钮
self._central_layout.addWidget(self._min_button)
self._central_layout.addWidget(self._max_button)
self._central_layout.addWidget(self._close_button)
return self._skin_button
def _load_icon(self):
"""设置图标"""
res = ':/res/images/'
if self._series == 'black':
if self._menu_button:
self.set_menu_icon(res + 'title_menu.ico')
if self._skin_button:
self.set_skin_icon(res + 'title_skin.ico')
self.set_min_icon(res + 'title_min.ico')
self.set_max_icon(res + 'title_max.ico')
self.set_restore_icon(res + 'title_restore.ico')
self.set_close_icon(res + 'title_close.ico')
elif self._series == 'white':
if self._menu_button:
self.set_menu_icon(res + 'title_menu_w.ico')
if self._skin_button:
self.set_skin_icon(res + 'title_skin_w.ico')
self.set_min_icon(res + 'title_min_w.ico')
self.set_max_icon(res + 'title_max_w.ico')
self.set_restore_icon(res + 'title_restore_w.ico')
self.set_close_icon(res + 'title_close_w.ico')
def _check_parent(self):
"""判断是否有父窗口"""
if isinstance(self._parent, QWidget) or (
isinstance(self._parent, QMainWindow)):
return True
else:
return False
# 槽函数
def min_button_click(self):
"""最小化"""
if self._check_parent():
self._parent.showMinimized()
else:
self.showMinimized()
def max_button_click(self):
"""最大化(恢复)"""
if self._check_parent():
if self._parent.isMaximized():
self._parent.showNormal()
self._max_button.setIcon(self._max_icon)
else:
self._parent.showMaximized()
self._max_button.setIcon(self._restore_icon)
def close_button_click(self):
"""关闭"""
if self._check_parent():
self._parent.close()
else:
self.close()
class OWindow(QMainWindow):
"""这是自定义的窗口"""
def __init__(self, title='PyOc'):
super().__init__()
self.setWindowFlags(Qt.FramelessWindowHint) # 设置为无标题栏
# ~ self.setAttribute(Qt.WA_TranslucentBackground) # 设置窗口背景透明
# ~ self.setWindowOpacity(0.85) # 设置窗口不透明度
self._super = None # 顶级控件(放置背景图片)
self._central = None # 主部件(放置标题栏、工具栏、客户区)
self._super_layout = None # 顶级布局(垂直)
self._central_layout = None # 中心布局(垂直)
self.title = title # 标题
self.titlebar = None # 标题栏(OTitleBar)
self.toolbar = None # 工具栏(QStackedWidget)
self.client = None # 客户区(QStackedWidget)
self.MOVE_SENSITIVITY = 3 # 窗口移动反应灵敏度,反比
self.MARGIN = 9 # 边缘宽度(拖动改变窗口大小)
self._bgimg = None # 存放背景图片的变量
self._isPressed = False
self._press_button = None
self._last_geometry = None
self._area = None
self._move_count = 0
# 初始化窗口属性
self.init_window()
self.setMinimumHeight(self.titlebar.height())
self.setMinimumWidth(self.titlebar.minimumWidth())
# 设置布局间隙
set_all_gap(self._super_layout)
set_all_gap(self._central_layout)
# 设置尺寸策略
self.toolbar.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
# 安装事件过滤器
self.titlebar._min_button.installEventFilter(self)
self.titlebar._max_button.installEventFilter(self)
self.titlebar._close_button.installEventFilter(self)
# 设置鼠标追踪
self.setMouseTracking(True)
self._super.setMouseTracking(True)
self._central.setMouseTracking(True)
self.toolbar.setMouseTracking(True)
self.client.setMouseTracking(True)
# 加载默认样式表
self.setStyleSheet('')
# 显示窗口
self.show()
def init_window(self):
"""初始化窗口"""
# 超·部件(不显示)
self._super = QWidget()
self._super.setObjectName('OSuper')
# 重设窗口主控件
self.setCentralWidget(self._super)
# 中心控件(显示部分)
self._central = QWidget()
self._central.setObjectName('OCentral')
self._central_layout = QVBoxLayout(self._central)
# 标题栏
self.titlebar = OTitleBar(self)
# 设置标题
self.setWindowTitle(self.title)
# 工具栏
self.toolbar = QStackedWidget()
# 客户区,放入客户区布局
self.client = QStackedWidget()
self.client.setObjectName('OClient')
# 中心布局添加部件
self._central_layout.addWidget(self.titlebar)
self._central_layout.addWidget(self.toolbar)
self._central_layout.addWidget(self.client)
# 超·布局
self._super_layout = QVBoxLayout(self._super)
self._super_layout.addWidget(self._central)
self._super.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
self.setMinimumHeight(self.titlebar.title_label.height())
def set_titlebar_height(self, height):
"""设置标题栏高度"""
self.titlebar.setFixedHeight(height)
def _adapt_bg(self, image):
"""返回适应窗口大小的背景图片"""
image = image.scaled(self.width(), self.height(), \
Qt.KeepAspectRatioByExpanding, \
Qt.SmoothTransformation)
return image
def set_bg(self, image):
"""设置本地背景图片
形参 image 可以是 QPixmap 实例、资源路径或磁盘路径。
"""
if type(image) == QPixmap:
self._bgimg = image
elif type(image) == str:
image = image.strip()
if image[:4] == 'http':
logging.warning("set_bg(self, image: Union[QPixmap, path])" +
"\n: The argument 1 is a URL like, you might want to use" +
" set_web_bg(self, url, params=None, **kwargs).")
self.set_web_bg(image)
return None
elif not image:
logging.warning("set_bg(self, image: Union[QPixmap, path])" +
"\n: The argument 1 is null.")
return None
elif not exists(image) and image[:2] != ':/':
logging.warning("set_bg(self, image: Union[QPixmap, path])" +
"\n: The file '{}' is inexistence.".format(image))
return None
image = QPixmap(image)
self._bgimg = image
else:
return None
adapt_image = self._adapt_bg(self._bgimg)
palette = QPalette()
palette.setBrush(QPalette.Window, QBrush(adapt_image))
self.setPalette(palette)
def set_web_bg(self, url, params=None, **kwargs):
"""使用 requests.get 加载来自网络的背景图片"""
if url[:4] == 'http':
try:
response = get(url, params=None, **kwargs)
except Exception as e:
loggin.warning('Error: OcGui.OWindow.set_web_bg, ', e)
return False
else:
img = QPixmap()
img.loadFromData(response.content)
self._bgimg = img
palette = QPalette()
adapt = self._adapt_bg(img)
palette.setBrush(QPalette.Window, QBrush(adapt))
self.setPalette(palette)
return True
def add_tools(self, widget):
"""添加工具栏"""
if not isinstance(widget, QWidget):
logging.warning('add_tools(self, widget: QWidget): argument 1 ' +
'is unexpected type {}'.format(type(widget)))
return None
return self.toolbar.addWidget(widget)
def set_page(self, index, obj='client'):
"""切换页面"""
if obj == 'client':
self.client.setCurrentIndex(index)
elif obj == 'toolbar':
self.toolbar.setCurrentIndex(index)
def _change_cursor_icon(self, area):
"""改变鼠标在窗口边缘时的图片"""
if self.maximumWidth() == self.minimumWidth() and (area == 21 or area == 23):
return None
if self.maximumHeight() == self.minimumHeight() and (area == 12 or area == 32):
return None
if area == 11 or area == 33:
self.setCursor(Qt.SizeFDiagCursor)
elif area == 12 or area == 32:
self.setCursor(Qt.SizeVerCursor)
elif area == 13 or area == 31:
self.setCursor(Qt.SizeBDiagCursor)
elif area == 21 or area == 23:
self.setCursor(Qt.SizeHorCursor)
else:
self.setCursor(Qt.ArrowCursor)
def _compute_area(self, pos):
"""计算鼠标在窗口中的区域
Args:
pos: 鼠标相对于窗口的位置
margin: 以此值为外边框宽度,划为九宫格区域
"""
margin = self.MARGIN
# 定位列坐标
if pos.x() < margin:
line = 1
elif pos.x() > self.width() - margin:
line = 3
else:
line = 2
# 定位行坐标并结合列坐标
if pos.y() < margin:
return 10 + line
elif pos.y() > self.height() - margin:
return 30 + line
else:
return 20 + line
def _pos_percent(self, pos):
"""返回鼠标相对窗口的纵横百分比"""
if pos.x() <= 0:
x = 0
else:
x = round(pos.x() / self.width(), 3)
if pos.y() <= 0:
y = 0
else:
y = round(pos.y() / self.height(), 3)
return x, y
def _move(self, event):
"""实现窗口移动"""
self._move_count += 1
# 判断移动次数,减少灵敏度
if self._move_count < self.MOVE_SENSITIVITY:
return None
# 最大化时需恢复并移动到鼠标位置
if self.isMaximized():
relative = self._pos_percent(event.pos())
self.titlebar.max_button_click()
gpos = event.globalPos()
width = self._last_geometry.width()
height = self._last_geometry.height()
x = gpos.x() - round(width * relative[0])
y = gpos.y() - round(height * relative[1])
self.setGeometry(x, y, width, height)
else:
# 鼠标移动偏移量
offsetPos = event.globalPos() - self._posLast
# ~ print(self.pos(), '->', self.pos() + offsetPos)
self.move(self.pos() + offsetPos)
def _resize(self, event):
"""实现拖动调整窗口大小的函数
以新旧坐标差计算偏移量,使用 QRect 实例附带位置坐标;
核心算法做了三重校验,以确保任意情况下窗口都能以正确的方式调整大小:
一: 横纵坐标与最值校验,确保在最值范围内调整大小;
二: 横纵坐标与左右区块校验,确保鼠标在窗口边缘时才调整大小;
三: 横纵坐标与极值偏移量校验,确保在改变坐标的情况下,窗口不会发生漂移
"""
# 鼠标在窗口中的区域
area = self._area
# 鼠标偏移量
offsetPos = event.globalPos() - self._posLast
# 鼠标在窗口中的坐标
winPos = event.pos()
# 矩形实例,被赋予窗口的几何属性(x, y, width, height)
# 利用其改变左上角坐标,但右下角坐标不变的特性,实现窗口移动效果
rect = QRect(self.geometry())
x = rect.x()
y = rect.y()
width = rect.width()
height = rect.height()
minWidth = self.minimumWidth()
minHeight = self.minimumHeight()
maxWidth = self.maximumWidth()
maxHeight = self.maximumHeight()
# 根据不同区域选择不同操作
if area == 11:
# 左上
pos = rect.topLeft()
if offsetPos.x() < 0 and width < maxWidth or offsetPos.x() > 0 and width > minWidth:
if offsetPos.x() < 0 and winPos.x() <= 0 or offsetPos.x() > 0 and winPos.x() >= 0:
if (maxWidth - width) >= -offsetPos.x() and (width - minWidth) >= offsetPos.x():
pos.setX(pos.x() + offsetPos.x())
if offsetPos.y() < 0 and height < maxHeight or offsetPos.y() > 0 and height > minHeight:
if offsetPos.y() < 0 and winPos.y() <= 0 or offsetPos.y() > 0 and winPos.y() >= 0:
if (maxHeight - height) >= -offsetPos.y() and (height - minHeight) >= offsetPos.y():
pos.setY(pos.y() + offsetPos.y())
rect.setTopLeft(pos)
elif area == 13:
# 右上
pos = rect.topRight()
if offsetPos.x() < 0 and width > minWidth or offsetPos.x() > 0 and width < maxWidth:
if offsetPos.x() < 0 and winPos.x() <= width or offsetPos.x() > 0 and winPos.x() >= width:
pos.setX(pos.x() + offsetPos.x())
if offsetPos.y() < 0 and height < maxHeight or offsetPos.y() > 0 and height > minHeight:
if offsetPos.y() < 0 and winPos.y() <= 0 or offsetPos.y() > 0 and winPos.y() >= 0:
if (maxHeight - height) >= -offsetPos.y() and (height - minHeight) >= offsetPos.y():
pos.setY(pos.y() + offsetPos.y())
rect.setTopRight(pos)
elif area == 31:
# 左下
pos = rect.bottomLeft()
if offsetPos.x() < 0 and width < maxWidth or offsetPos.x() > 0 and width > minWidth:
if offsetPos.x() < 0 and winPos.x() <= 0 or offsetPos.x() > 0 and winPos.x() >= 0:
if (maxWidth - width) >= -offsetPos.x() and (width - minWidth) >= offsetPos.x():
pos.setX(pos.x() + offsetPos.x())
if offsetPos.y() < 0 and height > minHeight or offsetPos.y() > 0 and height < maxHeight:
if offsetPos.y() < 0 and winPos.y() <= height or offsetPos.y() > 0 and winPos.y() >= height:
pos.setY(pos.y() + offsetPos.y())
rect.setBottomLeft(pos)
elif area == 33:
# 右下
pos = rect.bottomRight()
if offsetPos.x() < 0 and width > minWidth or offsetPos.x() > 0 and width < maxWidth:
if offsetPos.x() < 0 and winPos.x() <= width or offsetPos.x() > 0 and winPos.x() >= width:
pos.setX(pos.x() + offsetPos.x())
if offsetPos.y() < 0 and height > minHeight or offsetPos.y() > 0 and height < maxHeight:
if offsetPos.y() < 0 and winPos.y() <= height or offsetPos.y() > 0 and winPos.y() >= height:
pos.setY(pos.y() + offsetPos.y())
rect.setBottomRight(pos)
elif area == 12:
# 中上
if offsetPos.y() < 0 and height < maxHeight or offsetPos.y() > 0 and height > minHeight:
if offsetPos.y() < 0 and winPos.y() <= 0 or offsetPos.y() > 0 and winPos.y() >= 0:
if (maxHeight - height) >= -offsetPos.y() and (height - minHeight) >= offsetPos.y():
rect.setTop(rect.top() + offsetPos.y())
elif area == 21:
# 中左
if offsetPos.x() < 0 and width < maxWidth or offsetPos.x() > 0 and width > minWidth:
if offsetPos.x() < 0 and winPos.x() <= 0 or offsetPos.x() > 0 and winPos.x() >= 0:
if (maxWidth - width) >= -offsetPos.x() and (width - minWidth) >= offsetPos.x():
rect.setLeft(rect.left() + offsetPos.x())
elif area == 23:
# 中右
if offsetPos.x() < 0 and width > minWidth or offsetPos.x() > 0 and width < maxWidth:
if offsetPos.x() < 0 and winPos.x() <= width or offsetPos.x() > 0 and winPos.x() >= width:
rect.setRight(rect.right() + offsetPos.x())
elif area == 32:
# 中下
if offsetPos.y() < 0 and height > minHeight or offsetPos.y() > 0 and height < maxHeight:
if offsetPos.y() < 0 and winPos.y() <= height or offsetPos.y() > 0 and winPos.y() >= height:
rect.setBottom(rect.bottom() + offsetPos.y())
# 设置窗口几何属性(坐标,宽高)
self.setGeometry(rect)
# 重写方法
def setWindowIcon(self, icon='default', width=16, height=16):
"""设置窗口图标"""
if icon == 'default':
icon = set_icon(self.titlebar._title_icon, ':/res/images/one_ccs.ico',
width=width, height=height)
else:
icon = set_icon(self.titlebar._title_icon, icon, width=width, height=height)
QWidget.setWindowIcon(self, QIcon(icon))
def setWindowTitle(self, string):
"""设置窗口标题"""
self.titlebar.title_label.setText(string)
def addWidget(self, widget):
"""每添加一个 widget 既一页"""
if not isinstance(widget, QWidget):
logging.warning('addWidget(self, widget: QWidget): argument 1 ' +
'is unexpected type {}'.format(type(widget)))
return None
return self.client.addWidget(widget)
def addLayout(self, *args):
"""禁止添加布局"""
logging.warning("You shouldn't useadd Layout(self, *args), " +
"you should use addWidget(self, widget).")
def setStyleSheet(self, qss, default='enabled'):
"""加载样式表"""
if not isinstance(qss, str):
logging.warning('setStyleSheet(self, qss: str): argument 1' +
'is a unexpected type ' + type(qss))
return None
if default != 'disabled':
qss = OcGuiRes.qss + qss
if qss[:8] == 'PyOc.qss':
qss = qss[8:]
QWidget.setStyleSheet(self, qss)
elif qss.find('\\') or qss.find('/'):
try:
with open(qss, 'r') as f:
lines = f.readlines()
stylesheet = ''.join(lines)
except Exception as e:
logging.warning('Error of function OWindow.setStyleSheet()\n', e)
else:
QWidget.setStyleSheet(self, stylesheet)
else:
QWidget.setStyleSheet(self, qss)
# 重写事件
def eventFilter(self, obj, event):
"""事件过滤器"""
minb = self.titlebar._min_button
maxb = self.titlebar._max_button
clob = self.titlebar._close_button
skib = self.titlebar._skin_button
menb = self.titlebar._menu_button
if obj == minb or obj == maxb or obj == clob or obj == skib or obj == menb:
self.setCursor(Qt.ArrowCursor)
if obj == maxb and event.type() == QEvent.MouseButtonPress:
self._last_geometry = self.geometry()
# ~ return True # 说明这个事件已被处理,其他控件别插手
return QObject.eventFilter(self, obj, event) # 交由其他控件处理
def resizeEvent(self, event):
"""重写窗口大小改变事件,实现自适应背景图片"""
if not self._bgimg:
return None
palette = QPalette()
img = self._adapt_bg(self._bgimg)
palette.setBrush(QPalette.Window, QBrush(img))
self.setPalette(palette)
def mouseDoubleClickEvent(self, event):
"""重写继承的鼠标双击事件"""
self._last_geometry = self.geometry()
self.titlebar.max_button_click()
return QMainWindow.mouseDoubleClickEvent(self, event)
def mousePressEvent(self, event):
"""重写继承的鼠标按住事件"""
self._isPressed = True
self._press_button = event.button()
self._area = self._compute_area(event.pos())
self._move_count = 0
self._posLast = event.globalPos()
return QMainWindow.mousePressEvent(self, event)
def mouseReleaseEvent(self, event):
"""重写继承的鼠标释放事件"""
self._isPressed = False
self._press_button = None
self._area = None
self._move_count = 0
self.setCursor(Qt.ArrowCursor)
return QMainWindow.mouseReleaseEvent(self, event)
def mouseMoveEvent(self, event):
"""重写继承的鼠标移动事件,实现拖动改变窗口大小"""
area = self._compute_area(event.pos())
# 调整窗口大小及移动
if self._isPressed and self._press_button == Qt.LeftButton:
if self._area == 22:
self._move(event)
elif not self.isMaximized():
self._resize(event)
# 更新鼠标全局坐标
self._posLast = event.globalPos()
return None
if not self._isPressed and not self.isMaximized():
# 调整鼠标图标,按下鼠标后锁定状态
self._change_cursor_icon(area)
return QMainWindow.mouseMoveEvent(self, event)
def set_icon(obj, icon, width=20, height=20):
"""为 QLabel 或 QPushButton 设置图像"""
if not isinstance(obj, QLabel) and not isinstance(obj, QPushButton):
logging.warning('set_icon(obj: Union[QLabel, QPushButton], icon,' +
' width=20, height=20): argument 1 is unexpected' +
' type {}'.format(type(obj)))
return None
KAR = Qt.KeepAspectRatio
STFM = Qt.SmoothTransformation
if isinstance(obj, QLabel):
if isinstance(icon, str):
icon = QPixmap(icon).scaled(width, height, KAR, STFM)
obj.setPixmap(icon)
else:
if isinstance(icon, str):
icon = QIcon(QPixmap(icon))
if isinstance(icon, QPixmap):
icon = QIcon(icon)
obj.setIcon(icon)
obj.setIconSize(QSize(width, height))
return icon
def set_all_gap(layout, left=0, top=0, right=0, bottom=0, spacing=0):
"""设置布局间的所有间距"""
# 设置布局边距(左,顶,右,底)
layout.setContentsMargins(left, top, right, bottom)
# 去除布局及控件间的间隔
layout.setSpacing(spacing)