PyQt: Parameterize Connect Function

radiancef0rge

I have a set of 3 list widgets all with drag and drop capabilities. I am looking to eliminate repeated code and am looking for some help. As you can see in my Dialog class I create 3 Image classes that are drag and drog lists. As of right now each List Widget corresponds to a connect function.

</code>self.connect(self.one, SIGNAL("dropped"), self.oneDropped)</pre>It seems to me that the function&nbsp;<code><pre class="CodeBlock"><code>def oneDropped()

could be turned into a function where <pre class="CodeBlock"><code>self.oneDropped is an argument, but I am having trouble setting that up and could use some help. Here is my code.

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

class Image(QListWidget):
    def __init__(self, type, parent=None):
        super(Image, self).__init__(parent)
        self.setAcceptDrops(True)
        self.setIconSize(QSize(72, 72))

    def dragEnterEvent(self, event):
        if event.mimeData().hasUrls:
            event.accept()
        else:
            event.ignore()

    def dragMoveEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(Qt.CopyAction)
            event.accept()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasUrls:
            event.setDropAction(Qt.CopyAction)
            event.accept()
            links = []
            for url in event.mimeData().urls():
                links.append(str(url.toLocalFile()))
            self.emit(SIGNAL("dropped"), links)
        else:
            event.ignore()

class Dialog(QDialog):
    def __init__(self, parent=None):
        super(Dialog, self).__init__(parent)

        self.ui = uic.loadUi('./qt/default.ui', self)

        self.one = Image(self)
        self.two = Image(self)
        self.three = Image(self)
        self.connect(self.one, SIGNAL("dropped"), self.oneDropped)
        self.connect(self.two, SIGNAL("dropped"), self.twoDropped)
        self.connect(self.three, SIGNAL("dropped"), self.threeDropped)
        self.baseimage_layout.addWidget(self.one)
        self.redimage_layout.addWidget(self.two)
        self.greenimage_layout.addWidget(self.three)


    def oneDropped(self, l):
        for url in l:
            if os.path.exists(url):
                print(url)
                icon = QIcon(url)
                pixmap = icon.pixmap(72, 72)
                icon = QIcon(pixmap)
                item = QListWidgetItem(url, self.one)
                item.setIcon(icon) 

    def twoDropped(self, l):
        for url in l:
            if os.path.exists(url):
                print(url)
                icon = QIcon(url)
                pixmap = icon.pixmap(72, 72)
                icon = QIcon(pixmap)
                item = QListWidgetItem(url, self.two)
                item.setIcon(icon) 

    def threeDropped(self, l):
        for url in l:
            if os.path.exists(url):
                print(url)
                icon = QIcon(url)
                pixmap = icon.pixmap(72, 72)
                icon = QIcon(pixmap)
                item = QListWidgetItem(url, self.three)
                item.setIcon(icon) 

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

if __name__=="__main__":
    main()

RN

You can use a Python lambda function:
http://stackoverflow.com/a/940655/4206247

No idea if this works, but it's an idea:

self.connect(self.one, SIGNAL("dropped"), lambda links, who=self.one: self.processDropped(links, who))<br>self.connect(self.two, SIGNAL("dropped"), lambda links, who=self.two: self.processDropped(links, who))<br>self.connect(self.three, SIGNAL("dropped"), lambda links, who=self.three: self.processDropped(links, who))<br><br><br>def processDropped(self, l, thisImage):<br>        for url in l:<br>            if os.path.exists(url):<br>                print(url)<br>                icon = QIcon(url)<br>                pixmap = icon.pixmap(72, 72)<br>                icon = QIcon(pixmap)<br>                item = QListWidgetItem(url, thisImage)<br>                item.setIcon(icon)

radiancef0rge

That was the solution thanks man