Example Python Alert Dialogs using PyObjC (alternative to EasyDialogs?)

alert_demo.py

import objc
from AppKit import *
from Foundation import *

class Alert(object):
    
    def __init__(self, messageText):
        super(Alert, self).__init__()
        self.messageText = messageText
        self.informativeText = ""
        self.buttons = []
    
    def displayAlert(self):
        alert = NSAlert.alloc().init()
        alert.setMessageText_(self.messageText)
        alert.setInformativeText_(self.informativeText)
        alert.setAlertStyle_(NSInformationalAlertStyle)
        for button in self.buttons:
            alert.addButtonWithTitle_(button)
        NSApp.activateIgnoringOtherApps_(True)
        self.buttonPressed = alert.runModal()
    
def alert(message="Default Message", info_text="", buttons=["OK"]):    
    ap = Alert(message)
    ap.informativeText = info_text
    ap.buttons = buttons
    ap.displayAlert()
    return ap.buttonPressed

def cocoa_dialogs(fn):
    class MainRunner(object):
        def runWithShutdown_(self, timer):
            fn()
            NSApp.stop_(None)

        def run(self):
            NSTimer.scheduledTimerWithTimeInterval_target_selector_userInfo_repeats_(1, self, 'runWithShutdown:', "", False)                    
                    
    def wrapped():
        NSApplication.sharedApplication()
        MainRunner().run()
        NSApp.run()
        
    return wrapped

@cocoa_dialogs
def main():
    alert("Hello!", "We'll rule the world...in Python!", ["OK"])
    print "I love it"
    #big time computation
    x = 10000 + 1
    alert("Some Error?", "Maybe something bad happened?", ["Oh Well", "Thanks"])
    print "End of the code"
    
if __name__ == "__main__":
    main()

very cool ✨ 👍 ✨

Really great. Thanks!

Since alert.runModal() is called, won't that make the an alert dialog an modal ie shouldn't it require the user’s action before it can proceed? I am able to switch tabs even when the alert is shown.

Hi Experts

I am trying to run the alert dialog in Mac OSX 10.12. DMG App is bundled with python 3.4.4.
Not able to get the pop up alert dialog through logs it seems it goes till runModal() which doesnot return anything.

In Safari->Prefrences->Security the Enable Javascript is enabled and Block pop-up windows is disabled.

Any pointers on why it is getting blocked from safari, though the standalone code of alertdialog is working fine.

 def trusted_dialog(self, msg, title):
        from AppKit import NSAlertFirstButtonReturn
        try:
            title_buttons = [_("OK"), _("Cancel")]
            reply = self.displayAlert(msg, "", title_buttons)
            if reply == NSAlertFirstButtonReturn:
                return True
            else:
                get_logger().warning("User has NOT trusted the origin")
        except Exception as e:
            get_logger().debug("MessageBoxEx exception in MacOSX: {}".format(e))

    def displayAlert(self, text, title, title_buttons):
        from AppKit import NSAlert, NSInformationalAlertStyle, NSApp

        alert = NSAlert.alloc().init()
        alert.setMessageText_(text)
        alert.setInformativeText_(title)
        alert.setAlertStyle_(NSInformationalAlertStyle)
        for button in title_buttons:
            alert.addButtonWithTitle_(button)
        NSApp.activateIgnoringOtherApps_(True)
        return alert.runModal()