81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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"""
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【簡介】
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列印圖片範例
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"""
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from PyQt5.QtCore import Qt
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from PyQt5.QtGui import QImage , QIcon, QPixmap
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from PyQt5.QtWidgets import QApplication , QMainWindow, QLabel, QSizePolicy , QAction
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from PyQt5.QtPrintSupport import QPrinter, QPrintDialog
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import sys
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class MainWindow(QMainWindow):
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def __init__(self,parent=None):
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super(MainWindow,self).__init__(parent)
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self.setWindowTitle(self.tr("列印圖片"))
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# 建立一個置放圖形的QLabel物件imageLabel，並將該QLabel物件設定為中心視窗。
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self.imageLabel=QLabel()
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self.imageLabel.setSizePolicy(QSizePolicy.Ignored,QSizePolicy.Ignored)
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self.setCentralWidget(self.imageLabel)
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self.image=QImage()
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# 建立功能表、工具列等元件
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self.createActions()
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self.createMenus()
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self.createToolBars()
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# 在imageLabel物件中置放圖形
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if self.image.load("./images/screen.png"):
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self.imageLabel.setPixmap(QPixmap.fromImage(self.image))
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self.resize(self.image.width(),self.image.height())
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def createActions(self):
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self.PrintAction=QAction(QIcon("./images/printer.png"),self.tr("列印"),self)
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self.PrintAction.setShortcut("Ctrl+P")
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self.PrintAction.setStatusTip(self.tr("列印"))
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self.PrintAction.triggered.connect(self.slotPrint)
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def createMenus(self):
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PrintMenu=self.menuBar().addMenu(self.tr("列印"))
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PrintMenu.addAction(self.PrintAction)
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def createToolBars(self):
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fileToolBar=self.addToolBar("Print")
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fileToolBar.addAction(self.PrintAction)
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def slotPrint(self):
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# 新建一個QPrinter物件
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printer=QPrinter()
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# 建立一個QPrintDialog物件，參數為QPrinter物件
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printDialog=QPrintDialog(printer,self)
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'''
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判斷列印對話方塊顯示後是否點擊「列印」鈕，如果是，
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則相關列印屬性可以透過建立QPrintDialog物件時以QPrinter物件取得，
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若點擊「取消」鈕，則不執行後續的列印操作。
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'''
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if printDialog.exec_():
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# 建立一個QPainter物件，並指定繪圖設備為一個QPrinter物件。
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painter=QPainter(printer)
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# 取得QPainter物件的視窗矩形
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rect=painter.viewport()
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# 取得圖形的大小
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size=self.image.size()
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# 依照圖形的比例大小重新設定視窗矩形
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size.scale(rect.size(),Qt.KeepAspectRatio)
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painter.setViewport(rect.x(),rect.y(),size.width(),size.height())
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# 設定QPainter視窗大小為圖形的大小
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painter.setWindow(self.image.rect())
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# 列印
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painter.drawImage(0,0,self.image)
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if __name__ == "__main__":
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app=QApplication(sys.argv)
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main=MainWindow()
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main.show()
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sys.exit(app.exec_())
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