do not use exec_ on wizard

Closes: #3047

2 files changed, 22 insertions, 7 deletions

diff --git a/src/leap/gui/mainwindow.py b/src/leap/gui/mainwindow.py
index 7180139a..52caf08e 100644
--- a/src/leap/gui/mainwindow.py
+++ b/src/leap/gui/mainwindow.py
@@ -310,12 +310,22 @@ class MainWindow(QtGui.QMainWindow):
         if self._wizard is None:
             self._wizard = Wizard(bypass_checks=self._bypass_checks)
             self._wizard.accepted.connect(self._finish_init)
+            self._wizard.rejected.connect(self._wizard.close)
 
         self.setVisible(False)
-        self._wizard.exec_()
-        # We need this to process any wizard related event
-        QtCore.QCoreApplication.processEvents()
-        self._wizard = None
+        # Do NOT use exec_, it will use a child event loop!
+        # Refer to http://www.themacaque.com/?p=1067 for funny details.
+        self._wizard.show()
+        self._wizard.finished.connect(self._wizard_finished)
+
+    def _wizard_finished(self):
+        """
+        SLOT
+        TRIGGERS
+          self._wizard.finished
+
+        Called when the wizard has finished.
+        """
         self.setVisible(True)
 
     def _get_leap_logging_handler(self):
diff --git a/src/leap/gui/wizard.py b/src/leap/gui/wizard.py
index 67ade349..5333edeb 100644
--- a/src/leap/gui/wizard.py
+++ b/src/leap/gui/wizard.py
@@ -125,6 +125,11 @@ class Wizard(QtGui.QWizard):
         self._domain = None
         self._provider_config = ProviderConfig()
 
+        # We will store a reference to the defers for eventual use
+        # (eg, to cancel them) but not doing anything with them right now.
+        self._provider_select_defer = None
+        self._provider_setup_defer = None
+
         self.currentIdChanged.connect(self._current_id_changed)
 
         self.ui.lblPassword.setEchoMode(QtGui.QLineEdit.Password)
@@ -361,8 +366,8 @@ class Wizard(QtGui.QWizard):
         self._domain = self.ui.lnProvider.text()
 
         self.ui.lblNameResolution.setPixmap(self.QUESTION_ICON)
-        self._provider_bootstrapper.run_provider_select_checks(
-            self._domain)
+        self._provider_select_defer = self._provider_bootstrapper.\
+            run_provider_select_checks(self._domain)
 
     def _complete_task(self, data, label, complete=False, complete_page=-1):
         """
@@ -561,7 +566,7 @@ class Wizard(QtGui.QWizard):
                                           (self._provider_config
                                            .get_name(),))
             self.ui.lblDownloadCaCert.setPixmap(self.QUESTION_ICON)
-            self._provider_bootstrapper.\
+            self._provider_setup_defer = self._provider_bootstrapper.\
                 run_provider_setup_checks(self._provider_config)
 
         if pageId == self.PRESENT_PROVIDER_PAGE: