Add a widget gallery example

Since 072ca960f517f0cdfcb768dcbeebba2212a6c21e changed the default
of the styles example back to Norwegian Wood, it is no longer
suited as gallery example.

Extract the dialog from it and re-add it as a gallery example Add a
tooltip displaying the class name and a help shortcut opening the
documentation.

Restructure the group boxes to add more widgets.

Remove the gallery meta-tag from the styles example.

Task-number: PYSIDE-1112
Change-Id: Ie6f13084012771bd8f5bf9cad23b58d0720fdd92
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

1 files changed, 90 insertions, 0 deletions

diff --git a/examples/widgets/gallery/widgetgallery.h b/examples/widgets/gallery/widgetgallery.h
new file mode 100644
index 0000000000..419c925190
--- /dev/null
+++ b/examples/widgets/gallery/widgetgallery.h
@@ -0,0 +1,90 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef WIDGETGALLERY_H
+#define WIDGETGALLERY_H
+
+#include <QDialog>
+
+QT_BEGIN_NAMESPACE
+class QGroupBox;
+class QProgressBar;
+class QTabWidget;
+class QTextBrowser;
+class QToolBox;
+QT_END_NAMESPACE
+
+class WidgetGallery : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit WidgetGallery(QWidget *parent = nullptr);
+
+    void setVisible(bool visible) override;
+
+private slots:
+    void changeStyle(const QString &styleName);
+    void advanceProgressBar();
+    void helpOnCurrentWidget();
+    void updateSystemInfo();
+
+private:
+    static QGroupBox *createButtonsGroupBox();
+    static QTabWidget *createItemViewTabWidget();
+    static QGroupBox *createSimpleInputWidgetsGroupBox();
+    QToolBox *createTextToolBox();
+    QProgressBar *createProgressBar();
+
+    QProgressBar *progressBar;
+    QTextBrowser *systemInfoTextBrowser;
+};
+
+#endif // WIDGETGALLERY_H