小编Sau*_*igh的帖子

有没有办法检测用户是否试图关闭窗口？例如,在Tkinter中我们可以这样做:

def exit_dialog():
    #do stuff
    pass

root = Tk()
root.protocol("WM_DELETE_WINDOW", exit_dialog)
root.mainloop()

谢谢.

我有一个点列表.例如,points = [[160, 75], [115, 567]].

如何在PyQt4中绘制一条线,所以它会是这样的:

提前致谢.

编辑:为了记录,我正在尝试实现Bezier曲线,所以它看起来像这样:

这是我目前的代码:

from PyQt4.QtGui import QWidget, QPolygonF, QPainter, QPen, QBrush, QColor, \
    QApplication, QIcon, QVBoxLayout, QSlider, QHBoxLayout, QPushButton, QLCDNumber
from PyQt4.QtCore import QObject, SIGNAL, SLOT, QPointF, Qt, QRectF, QPointF
import time, sys

#================================================================
# For the next block I used this post
# http://stackoverflow.com/a/3220819/736306, 
# but I wish to replace it with self.liniar_bez(),
# biliniar_bez(), self.cubic_bez() and self.fourG_bez()
# because I want to control 't' with self.slider

def avg(a, …

我正在尝试为折线设置动画(它必须像波浪一样).我试过这种方式:

from PySide.QtCore import *
from PySide.QtGui import *
import sys, time

class Test(QMainWindow):
    def __init__(self, parent=None):
        QMainWindow.__init__(self, parent)

    def poly(self, pts):
        return QPolygonF(map(lambda p: QPointF(*p), pts))

    def paintEvent(self, event):
        painter = QPainter(self)

        pts = [[80, 490], [180, 0], [280, 0], [430, 0], [580, 0], [680, 0], [780, 0]]

        for i in pts:
            while i[1] < 600:

                painter.setPen(QPen(QColor(Qt.darkGreen), 3))

                painter.drawPolyline(self.poly(pts))

                painter.setBrush(QBrush(QColor(255, 0, 0)))
                painter.setPen(QPen(QColor(Qt.black), 1))

                for x, y in pts:
                    painter.drawEllipse(QRectF(x - 4, y - 4, 8, 8))

                i[1] += …

我正在尝试用Tkinter写简单的记事本.我需要一些字体选择器.所以我的问题是:是否包括一个？如果没有,我在哪里可以得到一个？

谢谢.

我试图在Python和Tkinter的帮助下编写一个简单的Arkanoid.目标是让球从顶部,右侧和左侧反射.如果球员错过球而接触到底部,则比赛将停止.

这是代码:

from Tkinter import *
import time

root = Tk()
canv = Canvas(root, highlightthickness=0)
canv.pack(fill='both', expand=True)
top = canv.create_line(0, 0, 640, 0, fill='green', tags=('top'))
left = canv.create_line(0, 0, 0, 480, fill='green', tags=('left'))
right = canv.create_line(639, 0, 639, 480, fill='green', tags=('right'))
bottom = canv.create_line(0, 478, 640, 478, fill='red', tags=('bottom'))

rect = canv.create_rectangle(270, 468, 365, 478, outline='black', fill='gray40', tags=('rect'))
ball = canv.create_oval(0, 20, 20, 40, outline='black', fill='gray40', tags=('ball'))

delta_x = delta_y = 3
new_x, new_y = delta_x, -delta_y
while True:
    time.sleep(0.025) …

这是我的问题细节:我有这些小部件 - QMenuBar,QTableWidget和QToolbar.这是我的代码示例:

import sys
from PySide import QtGui
class Example(QtGui.QMainWindow):

  def __init__(self):
      super(Example, self).__init__()

      self.header_lbls = ['Name', 'Second Name', 'Surname', 'Birth Date', 'Phone Number', 'Skype', 'E-mail']

      self.table = QtGui.QTableWidget(10, 7)
      self.table.setHorizontalHeaderLabels(self.header_lbls)
      self.setCentralWidget(self.table)

      #ACTIONS
      self.createActions()

      #MENUBAR
      self.createMenus()

      #TOOLBAR
      self.createToolbar()

      #STATUSBAR
      self.creatStatusbar()

def contextMenuEvent(self, event):
     self.menu = QtGui.QMenu(self.table)
     self.menu.addAction(self.aboutAct)
     self.menu.exec_(QtGui.QCursor.pos())

def createActions(self):
     self.exitAct = QtGui.QAction('E&xit', self, shortcut='Ctrl+Q',
        statusTip='Exit the application', triggered=app.exit)

def createMenus(self):
    self.menubar = self.menuBar()
    self.fileMenu = self.menuBar().addMenu("&File")
    self.fileMenu.addAction(self.exitAct)

def createToolbar(self):
    self.toolbar = self.addToolBar('Toolbar')
    self.toolbar.addAction(self.settingsAct)
    self.toolbar.addSeparator()
    self.toolbar.addAction(self.exitAct)

def creatStatusbar(self):
    self.statusBar() …

我正在尝试从sqlite数据库输出数据.我在PyQt的例子中做过,但它不起作用.似乎数据库已打开,但代码提供错误,但事实并非如此.你能告诉我为什么以及如何解决这个问题？

#####################################################################
# test.py                                                           #
# ! /usr/bin/env python                                             #
#  -*- coding: utf-8 -*-                                            #
#####################################################################

from PyQt4 import QtGui, QtCore, QtSql
from src.database import DBase

class Test(QtGui.QMainWindow):

    def __init__(self):
        super(Test, self).__init__()

        self.tview = QtGui.QTableView()
        self.setCentralWidget(self.tview)
        model = QtSql.QSqlTableModel(self)
        model.setTable("person")
        model.setEditStrategy(QtSql.QSqlTableModel.OnManualSubmit)
        model.select()
        model.setHeaderData(0, QtCore.Qt.Horizontal, QtCore.QObject.trUtf8(model, "?"))
        model.setHeaderData(1, QtCore.Qt.Horizontal, QtCore.QObject.trUtf8(model, "Name"))
        model.setHeaderData(2, QtCore.Qt.Horizontal, QtCore.QObject.trUtf8(model, "Lastname"))

        self.tview.setModel(model)

if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    db = DBase()
    db.connection_db()
    window = Test()
    window.resize(800, 600)
    window.show()
    sys.exit(app.exec_())

#####################################################################
# database.py                                                       # …