1 files changed, 62 insertions, 0 deletions
diff --git a/examples/charts/chartsgallery/contentwidget.cpp b/examples/charts/chartsgallery/contentwidget.cpp
new file mode 100644
index 00000000..06ea8314
--- /dev/null
+++ b/examples/charts/chartsgallery/contentwidget.cpp
@@ -0,0 +1,62 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include "contentwidget.h"
+
+#include <QChart>
+#include <QChartView>
+#include <QFont>
+#include <QLabel>
+#include <QVBoxLayout>
+
+ContentWidget::ContentWidget(QWidget *parent)
+    : QWidget(parent)
+{
+}
+
+void ContentWidget::load()
+{
+    if (m_loaded || layout())
+        return;
+
+    if (!doLoad()) {
+        auto errorLabel = new QLabel(this);
+        auto errorLayout = new QVBoxLayout(this);
+        errorLabel->setText(tr("Error loading the example:\n%1").arg(m_loadError));
+        QFont font = errorLabel->font();
+        font.setPointSize(20);
+        errorLabel->setFont(font);
+        errorLabel->setAlignment(Qt::AlignCenter);
+        errorLayout->addWidget(errorLabel);
+        setLayout(errorLayout);
+    }
+
+    m_loaded = true;
+}
+
+bool ContentWidget::doLoad()
+{
+    // Most examples do their initialization in constructor.
+    // Only those that can fail and show error message need to reimplement this method.
+    return true;
+}
+
+void ContentWidget::resizeEvent(QResizeEvent *)
+{
+    if (m_defaultChartView)
+        m_defaultChartView->resize(size());
+}
+
+// Most examples are simple and need only basic chart view widget, so provide it in this base class
+// to avoid duplicating code
+void ContentWidget::createDefaultChartView(QChart *chart)
+{
+    m_defaultChartView = new QChartView(chart, this);
+    m_defaultChartView->setRenderHint(QPainter::Antialiasing);
+}
+
+void ContentWidget::setDefaultChartView(QChartView *view)
+{
+    m_defaultChartView = view;
+    m_defaultChartView->setRenderHint(QPainter::Antialiasing);
+}