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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls 2 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 "qquickmacfocusframe.h"
#include <AppKit/AppKit.h>
#include <QtCore/qmetaobject.h>
#include <QtGui/qguiapplication.h>
#include <QtGui/private/qcoregraphics_p.h>
#include <QtQml/qqmlengine.h>
#include <QtQml/qqmlcontext.h>
#include <QtQml/qqmlcomponent.h>
#include <QtQuick/qquickitem.h>
#include <QtQuick/private/qquicktextinput_p.h>
#include <QtQuick/private/qquicktextedit_p.h>
#include <QtQuick/private/qquickflickable_p.h>
#include <QtQuickTemplates2/private/qquickframe_p.h>
#include <QtQuickTemplates2/private/qquickbutton_p.h>
#include <QtQuickTemplates2/private/qquickscrollview_p.h>
#include <QtQuickTemplates2/private/qquickslider_p.h>
#include <QtQuickTemplates2/private/qquickcombobox_p.h>
#include <QtQuickTemplates2/private/qquickcheckbox_p.h>
#include <QtQuickTemplates2/private/qquickradiobutton_p.h>
#include <QtQuickTemplates2/private/qquickspinbox_p.h>
#include <QtQuickTemplates2/private/qquicktextfield_p.h>
#include <QtQuickTemplates2/private/qquicktextarea_p.h>
#include "items/qquickstyleitem.h"
#include "qquicknativestyle.h"
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(lcFocusFrame, "qt.quick.controls.focusframe")
QQuickFocusFrameDescription QQuickFocusFrameDescription::Invalid = { nullptr, QQuickStyleMargins(), 0 };
QScopedPointer<QQuickItem> QQuickMacFocusFrame::m_focusFrame;
QQuickMacFocusFrame::QQuickMacFocusFrame()
{
connect(qGuiApp, &QGuiApplication::focusObjectChanged, [=]{
if (auto item = qobject_cast<QQuickItem *>(qGuiApp->focusObject()))
moveToItem(item);
});
}
void QQuickMacFocusFrame::moveToItem(QQuickItem *item)
{
if (!m_focusFrame) {
const auto context = QQmlEngine::contextForObject(item);
if (!context)
return;
createFocusFrame(context);
}
const QQuickFocusFrameDescription &config = getDescriptionForItem(item);
if (!config.isValid()) {
m_focusFrame->setParentItem(nullptr);
m_focusFrame->setVisible(false);
return;
}
m_focusFrame->setVisible(true);
QMetaObject::invokeMethod(m_focusFrame.data(), "moveToItem",
Q_ARG(QVariant, QVariant::fromValue(config.target)),
Q_ARG(QVariant, QVariant::fromValue(config.margins)),
Q_ARG(QVariant, QVariant::fromValue(config.radius)));
}
void QQuickMacFocusFrame::createFocusFrame(QQmlContext *context)
{
QQmlComponent component(
context->engine(),
QUrl(QStringLiteral(
"qrc:/qt-project.org/imports/QtQuick/NativeStyle/util/FocusFrame.qml")));
m_focusFrame.reset(qobject_cast<QQuickItem *>(component.create()));
auto indicatorColor = qt_mac_toQColor(NSColor.keyboardFocusIndicatorColor.CGColor);
indicatorColor.setAlpha(255);
m_focusFrame->setProperty("systemFrameColor", indicatorColor);
}
QQuickFocusFrameDescription QQuickMacFocusFrame::getDescriptionForItem(QQuickItem *focusItem) const
{
qCDebug(lcFocusFrame) << "new focusobject:" << focusItem;
const auto parentItem = focusItem->parentItem();
if (!parentItem)
return QQuickFocusFrameDescription::Invalid;
// The item that gets active focus can be a child of the control (e.g
// editable ComboBox). In that case, resolve the actual control first.
const auto proxy = focusItem->property("__focusFrameControl").value<QQuickItem *>();
const auto control = proxy ? proxy : focusItem;
auto target = control->property("__focusFrameTarget").value<QQuickItem *>();
qCDebug(lcFocusFrame) << "target:" << target;
qCDebug(lcFocusFrame) << "control:" << control;
if (!target) {
// __focusFrameTarget points to the item in the control that should
// get the focus frame. This is usually the control itself, but can
// sometimes be a child (CheckBox). We anyway require
// this property to be set if we are to show the focus frame around
// the control in the first place. So for controls that don't want
// a frame (ProgressBar), we simply skip setting it.
// Also, we should never show a focus frame around custom controls.
// None of the built-in styles do that, so to be consistent, we
// shouldn't either. Besides, drawing a focus frame around an unknown
// item without any way to turn it off can easily be unwanted. A better
// way for custom controls to get a native focus frame is for us to offer
// a FocusFrame control (QTBUG-86818).
return QQuickFocusFrameDescription::Invalid;
}
// If the control gives us a QQuickStyleItem, we use that to configure the focus frame.
// By default we assume that the background delegate is a QQuickStyleItem, but the
// control can override this by setting __focusFrameStyleItem.
const auto styleItemProperty = control->property("__focusFrameStyleItem");
auto item = styleItemProperty.value<QQuickItem *>();
if (!item) {
const auto styleItemProperty = control->property("background");
item = styleItemProperty.value<QQuickItem *>();
}
qCDebug(lcFocusFrame) << "styleItem:" << item;
if (!item)
return QQuickFocusFrameDescription::Invalid;
if (QQuickStyleItem *styleItem = qobject_cast<QQuickStyleItem *>(item))
return { target, QQuickStyleMargins(styleItem->layoutMargins()), styleItem->focusFrameRadius() };
// Some controls don't have a QQuickStyleItem. But if the __focusFrameStyleItem
// has a "__isDefaultDelegate" property set, we show a default focus frame instead.
if (item->property("__isDefaultDelegate").toBool() == true) {
qCDebug(lcFocusFrame) << "'__isDefaultDelegate' property found, showing a default focus frame";
const QStyleOption opt;
const qreal radius = QQuickNativeStyle::style()->pixelMetric(QStyle::PM_TextFieldFocusFrameRadius, &opt);
return { target, QQuickStyleMargins(), radius };
}
// The application has set a custom delegate on the control. In that
// case, it's the delegates responsibility to draw a focus frame.
qCDebug(lcFocusFrame) << "custom delegates in use, skip showing focus frame";
return QQuickFocusFrameDescription::Invalid;
}
QT_END_NAMESPACE
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