Add CheckDelegate

CheckDelegate is an item delegate that is used in lists, and can be
checked and unchecked. It derives from QQuickItemDelegate and hence has
background press effects. The order of the indicator and text is
reversed (compared to CheckBox) to reflect what is most commonly seen
on mobile.

Change-Id: I6fdac226fe87247052389b2e49f6cf20d7be44fb
Task-number: QTBUG-52208
Reviewed-by: J-P Nurmi <jpnurmi@theqtcompany.com>

1 files changed, 93 insertions, 0 deletions

diff --git a/src/templates/qquickcheckdelegate_p.h b/src/templates/qquickcheckdelegate_p.h
new file mode 100644
index 00000000..20ca6b39
--- /dev/null
+++ b/src/templates/qquickcheckdelegate_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Templates module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUICKCHECKDELEGATE_P_H
+#define QQUICKCHECKDELEGATE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtQuickTemplates/private/qquickitemdelegate_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQuickCheckDelegatePrivate;
+
+class Q_QUICKTEMPLATES_EXPORT QQuickCheckDelegate : public QQuickItemDelegate
+{
+    Q_OBJECT
+    Q_PROPERTY(bool tristate READ isTristate WRITE setTristate NOTIFY tristateChanged FINAL)
+    Q_PROPERTY(Qt::CheckState checkState READ checkState WRITE setCheckState NOTIFY checkStateChanged FINAL)
+
+public:
+    explicit QQuickCheckDelegate(QQuickItem *parent = nullptr);
+
+    bool isTristate() const;
+    void setTristate(bool tristate);
+
+    Qt::CheckState checkState() const;
+    void setCheckState(Qt::CheckState state);
+
+Q_SIGNALS:
+    void tristateChanged();
+    void checkStateChanged();
+
+protected:
+    void checkStateSet() override;
+    void nextCheckState() override;
+
+#ifndef QT_NO_ACCESSIBILITY
+    QAccessible::Role accessibleRole() const override;
+#endif
+
+private:
+    Q_DISABLE_COPY(QQuickCheckDelegate)
+    Q_DECLARE_PRIVATE(QQuickCheckDelegate)
+};
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QQuickCheckDelegate)
+
+#endif // QQUICKCHECKDELEGATE_P_H