python programming作业10(文件的保存和读入尚未实现，持续更新中)
# -*- coding: utf-8 -*-
import os
import platform
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
#调画笔宽度的对话框
class PenWidthDlg(QDialog):
def __init__(self, parent=None):
super(PenWidthDlg, self).__init__(parent)
widthLabel = QLabel("宽度:")
self.widthSpinBox = QSpinBox()
widthLabel.setBuddy(self.widthSpinBox)
self.widthSpinBox.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
self.widthSpinBox.setRange(0, 50)
okButton = QPushButton("ok")
cancelButton = QPushButton("cancle")
layout = QGridLayout()
layout.addWidget(widthLabel,0,0)
layout.addWidget(self.widthSpinBox,0,1)
layout.addWidget(okButton,1,0)
layout.addWidget(cancelButton,1,1)
self.setLayout(layout)
self.setWindowTitle("宽度设置")
okButton.clicked.connect(self.accept)
cancelButton.clicked.connect(self.reject)
class myMainWindow(QMainWindow):
def __init__(self,parent=None):
super().__init__(parent)
#初始化参数
self.initData()
#清空画布
self.initView()
'''
a="F:/ProgramData/我的python/python_programming/cat.jpg"
self.pixmap = QPixmap(a)
self.painter = QPainter(self.pixmap)
self.painter.setPen(self.pen)
self.imageLabel.setPixmap(self.pixmap)
'''
#菜单栏
self.Menu = self.menuBar().addMenu("菜单")
#清空
self.ClearAction = QAction(QIcon("images/file-new.gif"), "清空", self)
self.ClearAction.triggered.connect(self.initView)
self.Menu.addAction(self.ClearAction)
#调画笔颜色
self.changeColor = QAction(QIcon("images/color.png"), "颜色", self)
self.changeColor.triggered.connect(self.showColorDialog)
self.Menu.addAction(self.changeColor)
#调画笔粗细
self.changeWidth = QAction(QIcon("images/width.ico"), "宽度", self)
self.changeWidth.triggered.connect(self.showWidthDialog)
self.Menu.addAction(self.changeWidth)
'''
#右侧停靠窗口
logDockWidget = QDockWidget("Log", self)
logDockWidget.setAllowedAreas(Qt.LeftDockWidgetArea|Qt.RightDockWidgetArea)
self.listWidget = QListWidget()
logDockWidget.setWidget(self.listWidget)
self.addDockWidget(Qt.RightDockWidgetArea, logDockWidget)
'''
#各种动作
self.fileOpenAction = QAction(QIcon("images/fileopen.png"), "&Open", self)
self.fileOpenAction.setShortcut(QKeySequence.Open)
self.fileOpenAction.setToolTip("Open an image.")
self.fileOpenAction.setStatusTip("Open an image.")
self.fileOpenAction.triggered.connect(self.fileOpen)
self.fileSaveAction = QAction(QIcon("images/filesave.png"), "&Save", self)
self.fileSaveAction.setShortcut(QKeySequence.Save)
self.fileSaveAction.setToolTip("Save an image.")
self.fileSaveAction.setStatusTip("Save an image.")
self.fileSaveAction.triggered.connect(self.fileSaveAs)
#工具栏
fileToolbar = self.addToolBar("文件")
fileToolbar.addAction(self.fileOpenAction)
fileToolbar.addAction(self.fileSaveAction)
editToolbar = self.addToolBar("清空")
editToolbar.addAction(self.ClearAction)
colorToolbar = self.addToolBar("颜色")
colorToolbar.addAction(self.changeColor)
widthToolbar = self.addToolBar("宽度")
widthToolbar.addAction(self.changeWidth)
#状态栏
self.sizeLabel = QLabel()
self.sizeLabel.setFrameStyle(QFrame.StyledPanel|QFrame.Sunken)
status = self.statusBar()
status.setSizeGripEnabled(False)
status.addPermanentWidget(self.sizeLabel)
status.showMessage("Ready", 5000)
def initData(self):
self.size = QSize(480,460)
self.pixmap = QPixmap(self.size)
self.dirty = False
self.filename = None
self.recentFiles = []
#新建画笔
self.width = 5
self.color = QColor(0, 0, 0)
self.pen = QPen() # 实例化画笔对象
self.pen.setColor(self.color) #设置画笔颜色
self.pen = QPen(Qt.SolidLine) #实例化画笔对象.参数：画笔样式
self.pen.setWidth(self.width) #设置画笔粗细
#新建绘图工具
self.painter = QPainter(self.pixmap)
self.painter.setPen(self.pen)
#鼠标位置
self.__lastPos = QPoint(0,0)#上一次鼠标位置
self.__currentPos = QPoint(0,0)#当前的鼠标位置
self.image = QImage()
def initView(self):
#设置界面的尺寸为__size
self.Clear()
self.imageLabel = QLabel()
self.imageLabel.setPixmap(self.pixmap)
self.setCentralWidget(self.imageLabel)
def Clear(self):
#清空画板
self.pixmap.fill(Qt.white)
self.update()
self.dirty = False
'''
def painting(self):
self.painter.drawLine(1,1,200,200)
#画完图以后放回去
self.imageLabel.setPixmap(self.pixmap)
'''
def mousePressEvent(self,event):
#鼠标按下时，获取鼠标的当前位置保存为上一次位置
self.__currentPos = event.pos()
self.__lastPos = self.__currentPos
def mouseMoveEvent(self,event):
#鼠标移动时，更新当前位置，并在上一个位置和当前位置间画线
self.__currentPos = event.pos()
#self.painter = QPainter(self.pixmap)
#self.painter.setPen(self.pen)
self.painter.drawLine(self.__lastPos, self.__currentPos)
self.__lastPos = self.__currentPos
self.imageLabel.setPixmap(self.pixmap)
#调画笔颜色
def showColorDialog(self):
col = QColorDialog.getColor()
self.pen.setColor(col)
self.painter.setPen(self.pen)
def updateWidth(self):
print(self.width)
self.pen.setWidth(self.width)
self.painter.setPen(self.pen)
def showWidthDialog(self):
dialog = PenWidthDlg(self)
dialog.widthSpinBox.setValue(self.width)
if dialog.exec_():
self.width = dialog.widthSpinBox.value()
self.updateWidth()
'''####################################################'''
def okToContinue(self): #警告当前图像未保存
if self.dirty:
reply = QMessageBox.question(self,
"Image Changer - Unsaved Changes",
"Save unsaved changes?",
QMessageBox.Yes|QMessageBox.No|QMessageBox.Cancel)
if reply == QMessageBox.Cancel:
return False
elif reply == QMessageBox.Yes:
return self.fileSaveAs()
return True
def fileOpen(self):
if not self.okToContinue():
return
dir = (os.path.dirname(self.filename)
if self.filename is not None else ".")
formats = (["*.{}".format(format.data().decode("ascii").lower())
for format in QImageReader.supportedImageFormats()])
fname = QFileDialog.getOpenFileName(self,
"Image Changer - Choose Image", dir,
"Image files ({})".format(" ".join(formats)))
if fname:
print(1)
self.loadFile(fname[0])
print(2)
#self.painter = QPainter(self.pixmap)
print(3)
#self.painter.setPen(self.pen)
#self.updateFileMenu()
print(self.filename)
self.updatePainter()
print(type(self.filename))
def updatePainter(self):
#self.pixmap = QPixmap(self.filename)
print(333)
print(self.pixmap)
'''
try:
self.painter = QPainter(self.pixmap)
except Exception e:
print(Exception,":",e)
'''
print(444)
self.painter.setPen(self.pen)
print(555)
self.imageLabel.setPixmap(self.pixmap)
print(666)
def loadFile(self, fname=None):
if fname is None:
action = self.sender()
if isinstance(action, QAction):
fname = action.data()
if not self.okToContinue():
return
else:
return
if fname:
self.filename = None
image = QImage(fname)
if image.isNull():
message = "Failed to read {}".format(fname)
else:
self.addRecentFile(fname)
self.image = QImage()
self.image = image
self.filename = fname
self.showImage()
self.dirty = False
message = "Loaded {}".format(os.path.basename(fname))
self.updateStatus(message)
def updateStatus(self, message):
self.statusBar().showMessage(message, 5000)
if self.filename:
self.setWindowTitle("Image Changer - {}[*]".format(
os.path.basename(self.filename)))
print(8)
elif not self.image.isNull():
self.setWindowTitle("Image Changer - Unnamed[*]")
else:
self.setWindowTitle("Image Changer[*]")
def updateFileMenu(self):
self.fileMenu.clear()
self.fileMenu.addAction(self.fileOpenAction)
self.fileMenu.addAction(self.fileSaveAction)
current = self.filename
recentFiles = []
print(self.recentFiles)
for fname in self.recentFiles:
if fname != current and QFile.exists(fname):
recentFiles.append(fname)
if recentFiles:
self.fileMenu.addSeparator()
for i, fname in enumerate(recentFiles):
action = QAction(QIcon("images/icon.png"),
"&{} {}".format(i + 1, QFileInfo(
fname).fileName()), self)
action.setData(fname)
action.triggered.connect(lambda: self.loadFile(fname))
self.fileMenu.addAction(action)
def addRecentFile(self, fname):
if fname is None:
return
if fname not in self.recentFiles:
if len(self.recentFiles) < 10:
self.recentFiles = [fname] + self.recentFiles
else:
self.recentFiles = [fname] + self.recentFiles[:8]
print(len(self.recentFiles))
def fileSaveAs(self):
if self.image.isNull():
return True
fname = self.filename if self.filename is not None else "."
formats = (["*.{}".format(format.data().decode("ascii").lower())
for format in QImageWriter.supportedImageFormats()])
fname = QFileDialog.getSaveFileName(self,
"Image Changer - Save Image", fname,
"Image files ({})".format(" ".join(formats)))
fname = fname[0]
if fname:
print(fname)
if "." not in fname:
fname += ".png"
self.addRecentFile(fname)
self.filename = fname
if self.image.save(self.filename, None):
self.updateStatus("Saved as {}".format(self.filename))
self.dirty = False
return True
else:
self.updateStatus("Failed to save {}".format(
self.filename))
return False
return False
def showImage(self, percent=None):
if self.image.isNull():
return
self.pixmap = QPixmap.fromImage(self.image)
self.imageLabel.setPixmap(self.pixmap)
app = QApplication(sys.argv)
form = myMainWindow()
form.setMinimumSize(400,400)
form.show()
app.exec_()
文件的保存和读入尚未实现，遇到了bug，555...，望有大神能有所指点！！！
