Platform: add FontDialog

Change-Id: Icda7f8ad0a4cdaace1a2c33fd42cfd071d547a15
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

5 files changed, 253 insertions, 0 deletions

diff --git a/src/imports/platform/doc/images/qtlabsplatform-fontdialog-gtk.png b/src/imports/platform/doc/images/qtlabsplatform-fontdialog-gtk.png
new file mode 100644
index 00000000..9f3dc2e7
--- /dev/null
+++ b/src/imports/platform/doc/images/qtlabsplatform-fontdialog-gtk.png
diff --git a/src/imports/platform/platform.pri b/src/imports/platform/platform.pri
index 289b7d4f..40045a5d 100644
--- a/src/imports/platform/platform.pri
+++ b/src/imports/platform/platform.pri
@@ -1,6 +1,7 @@
 HEADERS += \
     $$PWD/qquickplatformcolordialog_p.h \
     $$PWD/qquickplatformdialog_p.h \
+    $$PWD/qquickplatformfontdialog_p.h \
     $$PWD/qquickplatformiconloader_p.h \
     $$PWD/qquickplatformmenu_p.h \
     $$PWD/qquickplatformmenubar_p.h \
@@ -11,6 +12,7 @@ HEADERS += \
 SOURCES += \
     $$PWD/qquickplatformcolordialog.cpp \
     $$PWD/qquickplatformdialog.cpp \
+    $$PWD/qquickplatformfontdialog.cpp \
     $$PWD/qquickplatformiconloader.cpp \
     $$PWD/qquickplatformmenu.cpp \
     $$PWD/qquickplatformmenubar.cpp \
diff --git a/src/imports/platform/qquickplatformfontdialog.cpp b/src/imports/platform/qquickplatformfontdialog.cpp
new file mode 100644
index 00000000..d0bc3e21
--- /dev/null
+++ b/src/imports/platform/qquickplatformfontdialog.cpp
@@ -0,0 +1,160 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickplatformfontdialog_p.h"
+
+#include <QtGui/qpa/qplatformtheme.h>
+#include <QtGui/private/qguiapplication_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \qmltype FontDialog
+    \inherits Dialog
+    \instantiates QQuickPlatformFontDialog
+    \inqmlmodule Qt.labs.platform
+    \since 5.8
+    \brief A native font dialog.
+
+    The FontDialog type provides a QML API for native platform font dialogs.
+
+    \image qtlabsplatform-fontdialog-gtk.png
+
+    To show a font dialog, construct an instance of FontDialog, set the
+    desired properties, and call \l {Dialog::}{open()}. FontDialog emits
+    the \l fontSelected() signal when the user has selected a font.
+
+    \code
+    MenuItem {
+        text: "Font"
+        onTriggered: fontDialog.open()
+    }
+
+    FontDialog {
+        id: fontDialog
+        currentFont.family: "Sans"
+        onFontSelected: document.font = font
+    }
+    \endcode
+
+    FontDialog is currently available on the following platforms:
+
+    \list
+    \li OS X
+    \li Linux (when running with the GTK+ platform theme)
+    \endlist
+
+    \labs
+*/
+
+/*!
+    \qmlsignal void Qt.labs.platform::FontDialog::fontSelected(font font)
+
+    This signal is emitted just after the user has clicked \uicontrol OK to select a \a font.
+
+    \sa currentFont
+*/
+
+QQuickPlatformFontDialog::QQuickPlatformFontDialog(QObject *parent)
+    : QQuickPlatformDialog(parent), m_options(QFontDialogOptions::create())
+{
+    QPlatformDialogHelper *dialog = QGuiApplicationPrivate::platformTheme()->createPlatformDialogHelper(QPlatformTheme::FontDialog);
+    if (QPlatformFontDialogHelper *fontDialog = qobject_cast<QPlatformFontDialogHelper *>(dialog)) {
+        connect(fontDialog, &QPlatformFontDialogHelper::currentFontChanged, this, &QQuickPlatformFontDialog::currentFontChanged);
+        connect(fontDialog, &QPlatformFontDialogHelper::fontSelected, this, &QQuickPlatformFontDialog::fontSelected);
+    }
+    setHandle(dialog);
+}
+
+/*!
+    \qmlproperty font Qt.labs.platform::FontDialog::currentFont
+
+    This property holds the currently selected font in the dialog.
+
+    \sa fontSelected()
+*/
+QFont QQuickPlatformFontDialog::currentFont() const
+{
+    if (QPlatformFontDialogHelper *fontDialog = qobject_cast<QPlatformFontDialogHelper *>(handle()))
+        return fontDialog->currentFont();
+    return QFont();
+}
+
+void QQuickPlatformFontDialog::setCurrentFont(const QFont &font)
+{
+    if (QPlatformFontDialogHelper *fontDialog = qobject_cast<QPlatformFontDialogHelper *>(handle()))
+        fontDialog->setCurrentFont(font);
+}
+
+/*!
+    \qmlproperty flags Qt.labs.platform::FontDialog::options
+
+    This property holds the various options that affect the look and feel of the dialog.
+
+    By default, all options are disabled.
+
+    Options should be set before showing the dialog. Setting them while the dialog is
+    visible is not guaranteed to have an immediate effect on the dialog (depending on
+    the option and on the platform).
+
+    Available options:
+    \value FontDialog.ScalableFonts Show scalable fonts.
+    \value FontDialog.NonScalableFonts Show non-scalable fonts.
+    \value FontDialog.MonospacedFonts Show monospaced fonts.
+    \value FontDialog.ProportionalFonts Show proportional fonts.
+    \value FontDialog.NoButtons Don't display \uicontrol OK and \uicontrol Cancel buttons (useful for "live dialogs").
+*/
+QFontDialogOptions::FontDialogOptions QQuickPlatformFontDialog::options() const
+{
+    return m_options->options();
+}
+
+void QQuickPlatformFontDialog::setOptions(QFontDialogOptions::FontDialogOptions options)
+{
+    if (options == m_options->options())
+        return;
+
+    m_options->setOptions(options);
+    emit optionsChanged();
+}
+
+void QQuickPlatformFontDialog::applyOptions()
+{
+    if (QPlatformFontDialogHelper *fontDialog = qobject_cast<QPlatformFontDialogHelper *>(handle()))
+        fontDialog->setOptions(m_options);
+}
+
+QT_END_NAMESPACE
diff --git a/src/imports/platform/qquickplatformfontdialog_p.h b/src/imports/platform/qquickplatformfontdialog_p.h
new file mode 100644
index 00000000..91f9a31a
--- /dev/null
+++ b/src/imports/platform/qquickplatformfontdialog_p.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Labs Platform 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 QQUICKPLATFORMFONTDIALOG_P_H
+#define QQUICKPLATFORMFONTDIALOG_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 "qquickplatformdialog_p.h"
+#include <QtGui/qfont.h>
+#include <QtQml/qqml.h>
+
+QT_BEGIN_NAMESPACE
+
+class QQuickPlatformFontDialog : public QQuickPlatformDialog
+{
+    Q_OBJECT
+    Q_PROPERTY(QFont currentFont READ currentFont WRITE setCurrentFont NOTIFY currentFontChanged FINAL)
+    Q_PROPERTY(QFontDialogOptions::FontDialogOptions options READ options WRITE setOptions NOTIFY optionsChanged FINAL)
+    Q_FLAGS(QFontDialogOptions::FontDialogOptions)
+
+public:
+    explicit QQuickPlatformFontDialog(QObject *parent = nullptr);
+
+    QFont currentFont() const;
+    void setCurrentFont(const QFont &font);
+
+    QFontDialogOptions::FontDialogOptions options() const;
+    void setOptions(QFontDialogOptions::FontDialogOptions options);
+
+Q_SIGNALS:
+    void optionsChanged();
+    void currentFontChanged();
+    void fontSelected(const QFont &font);
+
+protected:
+    void applyOptions() override;
+
+private:
+    QSharedPointer<QFontDialogOptions> m_options;
+};
+
+QT_END_NAMESPACE
+
+QML_DECLARE_TYPE(QQuickPlatformFontDialog)
+
+#endif // QQUICKPLATFORMFONTDIALOG_P_H
diff --git a/src/imports/platform/qtlabsplatformplugin.cpp b/src/imports/platform/qtlabsplatformplugin.cpp
index d6be08af..9e778856 100644
--- a/src/imports/platform/qtlabsplatformplugin.cpp
+++ b/src/imports/platform/qtlabsplatformplugin.cpp
@@ -39,6 +39,7 @@
 
 #include "qquickplatformdialog_p.h"
 #include "qquickplatformcolordialog_p.h"
+#include "qquickplatformfontdialog_p.h"
 
 #include "qquickplatformmenu_p.h"
 #include "qquickplatformmenubar_p.h"
@@ -75,6 +76,7 @@ void QtLabsPlatformPlugin::registerTypes(const char *uri)
 {
     qmlRegisterUncreatableType<QQuickPlatformDialog>(uri, 1, 0, "Dialog", QQuickPlatformDialog::tr("Dialog is an abstract base class"));
     qmlRegisterType<QQuickPlatformColorDialog>(uri, 1, 0, "ColorDialog");
+    qmlRegisterType<QQuickPlatformFontDialog>(uri, 1, 0, "FontDialog");
 
     qmlRegisterType<QQuickPlatformMenu>(uri, 1, 0, "Menu");
     qmlRegisterType<QQuickPlatformMenuBar>(uri, 1, 0, "MenuBar");