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pixMapItemでのマウスイベントの上書きは私には機能しませんでした; マウスクリックイベントはpixMapItemによって検出されません。これが私のコードです：

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class DrawImage( QMainWindow ):
    def __init__(self, path):

        QMainWindow.__init__(self)
        self.setWindowTitle('Select Window')
        self.local_image = QImage(path)

        self.local_grview = QGraphicsView()
        self.setCentralWidget( self.local_grview )

        self.local_scene = QGraphicsScene()

        self.image_format = self.local_image.format()
        self.pixMapItem = self.local_scene.addPixmap( QPixmap(self.local_image) )
        self.local_grview.setScene( self.local_scene )




        self.pixMapItem.mousePressEvent = self.pixelSelect

        self.show()
        sys.exit(app.exec_())

    def pixelSelect( self, event ):
        print 'hello'
        position = QPoint( event.pos().x(),  event.pos().y())
        color = QColor.fromRgb(self.local_image.pixel( position ) )
        if color.isValid():
            rgbColor = '('+str(color.red())+','+str(color.green())+','+str(color.blue())+','+str(color.alpha())+')'
            self.setWindowTitle( 'Pixel position = (' + str( event.pos().x() ) + ' , ' + str( event.pos().y() )+ ') - Value (R,G,B,A)= ' + rgbColor)
        else:
            self.setWindowTitle( 'Pixel position = (' + str( event.pos().x() ) + ' , ' + str( event.pos().y() )+ ') - color not valid')
4

1 に答える 1

5

私はあなたのコードを試しました。変更すれば動作するようになると思います

self.pixMapItem = self.local_scene.addPixmap( QPixmap(self.local_image) )

への行

self.pixMapItem = QGraphicsPixmapItem(QPixmap(self.local_image), None, self.local_scene)

以下は、私にとっては問題なく機能したコードの完全なバージョンです。

import sys
from PyQt4 import QtGui, QtCore
from PyQt4.QtGui import *
from PyQt4.QtCore import * 

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

        self.setWindowTitle('Select Window')
        self.local_image = QImage('image_file_name.JPG')

        self.local_grview = QGraphicsView()
        self.setCentralWidget( self.local_grview )

        self.local_scene = QGraphicsScene()

        self.image_format = self.local_image.format()
        #self.pixMapItem = self.local_scene.addPixmap( QPixmap(self.local_image) )
        self.pixMapItem = QGraphicsPixmapItem(QPixmap(self.local_image), None, self.local_scene)

        self.local_grview.setScene( self.local_scene )

        self.pixMapItem.mousePressEvent = self.pixelSelect

    def pixelSelect( self, event ):
        print 'hello'
        position = QPoint( event.pos().x(),  event.pos().y())
        color = QColor.fromRgb(self.local_image.pixel( position ) )
        if color.isValid():
            rgbColor = '('+str(color.red())+','+str(color.green())+','+str(color.blue())+','+str(color.alpha())+')'
            self.setWindowTitle( 'Pixel position = (' + str( event.pos().x() ) + ' , ' + str( event.pos().y() )+ ') - Value (R,G,B,A)= ' + rgbColor)
        else:
            self.setWindowTitle( 'Pixel position = (' + str( event.pos().x() ) + ' , ' + str( event.pos().y() )+ ') - color not valid')


def main():
    app = QtGui.QApplication(sys.argv)
    form = DrawImage()
    form.show()
    app.exec_()

if __name__ == '__main__':
    main()

これが役に立てば幸いです、よろしく

于 2010-08-29T19:33:38.560 に答える