Fix styling of QMessageBoxes

MessageBoxHandler will decide an appropriate parent widget for new
QMessageBox objects just before they are shown. This is not quaranteed
to be a PackageManagerGui instance, for example when the installer
wizard does not have focus, which means the style properties do not
get inherited.

Rather set the used style sheet for the whole application using
QApplication::setStyleSheet().

Task-number: QTIFW-2121
Change-Id: I6f2131279d6f6d3dd41b9eacab8404770aad09a3
Reviewed-by: Katja Marttila <katja.marttila@qt.io>

1 files changed, 1 insertions, 18 deletions

diff --git a/src/sdk/tabcontroller.cpp b/src/sdk/tabcontroller.cpp
index 5e2f1ed13..3bcb3f11a 100644
--- a/src/sdk/tabcontroller.cpp
+++ b/src/sdk/tabcontroller.cpp
@@ -1,6 +1,6 @@
 /**************************************************************************
 **
-** Copyright (C) 2017 The Qt Company Ltd.
+** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Installer Framework.
@@ -166,23 +166,6 @@ void TabController::restartWizard()
 void TabController::onSettingsButtonClicked()
 {
     SettingsDialog dialog(d->m_core);
-    // set custom stylesheet
-    const QString styleSheetFile = d->m_core->settings().styleSheet();
-    if (!styleSheetFile.isEmpty()) {
-        QFile sheet(styleSheetFile);
-        if (sheet.exists()) {
-            if (sheet.open(QIODevice::ReadOnly)) {
-                dialog.setStyleSheet(QString::fromLatin1(sheet.readAll()));
-            } else {
-                qCWarning(QInstaller::lcDeveloperBuild) << "The specified style sheet file "
-                    "can not be opened.";
-            }
-        } else {
-            qCWarning(QInstaller::lcDeveloperBuild) << "A style sheet file is specified, "
-                "but it does not exist.";
-        }
-    }
-
     connect(&dialog, &SettingsDialog::networkSettingsChanged,
             this, &TabController::onNetworkSettingsChanged);
     dialog.exec();