diff options
Diffstat (limited to 'src/plugins/platforms/mirclient/qmirclientscreenobserver.cpp')
| -rw-r--r-- | src/plugins/platforms/mirclient/qmirclientscreenobserver.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/plugins/platforms/mirclient/qmirclientscreenobserver.cpp b/src/plugins/platforms/mirclient/qmirclientscreenobserver.cpp new file mode 100644 index 0000000000..792aeca351 --- /dev/null +++ b/src/plugins/platforms/mirclient/qmirclientscreenobserver.cpp @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2016 Canonical, Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** 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.LGPL3 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-3.0.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 (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#include "qmirclientscreenobserver.h" +#include "qmirclientscreen.h" +#include "qmirclientwindow.h" +#include "qmirclientlogging.h" + +// Qt +#include <QMetaObject> +#include <QPointer> + +// Mir +#include <mirclient/mir_toolkit/mir_connection.h> +#include <mirclient/mir_toolkit/mir_display_configuration.h> + +#include <memory> + +namespace { + static void displayConfigurationChangedCallback(MirConnection */*connection*/, void* context) + { + ASSERT(context != NULL); + QMirClientScreenObserver *observer = static_cast<QMirClientScreenObserver *>(context); + QMetaObject::invokeMethod(observer, "update"); + } + + const char *mirFormFactorToStr(MirFormFactor formFactor) + { + switch (formFactor) { + case mir_form_factor_unknown: return "unknown"; + case mir_form_factor_phone: return "phone"; + case mir_form_factor_tablet: return "tablet"; + case mir_form_factor_monitor: return "monitor"; + case mir_form_factor_tv: return "tv"; + case mir_form_factor_projector: return "projector"; + } + Q_UNREACHABLE(); + } +} // anonymous namespace + +QMirClientScreenObserver::QMirClientScreenObserver(MirConnection *mirConnection) + : mMirConnection(mirConnection) +{ + mir_connection_set_display_config_change_callback(mirConnection, ::displayConfigurationChangedCallback, this); + update(); +} + +void QMirClientScreenObserver::update() +{ + // Wrap MirDisplayConfiguration to always delete when out of scope + auto configDeleter = [](MirDisplayConfig *config) { mir_display_config_release(config); }; + using configUp = std::unique_ptr<MirDisplayConfig, decltype(configDeleter)>; + configUp displayConfig(mir_connection_create_display_configuration(mMirConnection), configDeleter); + + // Mir only tells us something changed, it is up to us to figure out what. + QList<QMirClientScreen*> newScreenList; + QList<QMirClientScreen*> oldScreenList = mScreenList; + mScreenList.clear(); + + for (int i = 0; i < mir_display_config_get_num_outputs(displayConfig.get()); i++) { + const MirOutput *output = mir_display_config_get_output(displayConfig.get(), i); + if (mir_output_is_enabled(output)) { + QMirClientScreen *screen = findScreenWithId(oldScreenList, mir_output_get_id(output)); + if (screen) { // we've already set up this display before + screen->updateMirOutput(output); + oldScreenList.removeAll(screen); + } else { + // new display, so create QMirClientScreen for it + screen = new QMirClientScreen(output, mMirConnection); + newScreenList.append(screen); + qCDebug(mirclient) << "Added Screen with id" << mir_output_get_id(output) + << "and geometry" << screen->geometry(); + } + mScreenList.append(screen); + } + } + + // Announce old & unused Screens, should be deleted by the slot + Q_FOREACH (const auto screen, oldScreenList) { + Q_EMIT screenRemoved(screen); + } + + /* + * Mir's MirDisplayOutput does not include formFactor or scale for some reason, but Qt + * will want that information on creating the QScreen. Only way we get that info is when + * Mir positions a Window on that Screen. See "handleScreenPropertiesChange" method + */ + + // Announce new Screens + Q_FOREACH (const auto screen, newScreenList) { + Q_EMIT screenAdded(screen); + } + + qCDebug(mirclient) << "======================================="; + for (auto screen: mScreenList) { + qCDebug(mirclient) << screen << "- id:" << screen->mirOutputId() + << "geometry:" << screen->geometry() + << "form factor:" << mirFormFactorToStr(screen->formFactor()) + << "scale:" << screen->scale(); + } + qCDebug(mirclient) << "======================================="; +} + +QMirClientScreen *QMirClientScreenObserver::findScreenWithId(int id) +{ + return findScreenWithId(mScreenList, id); +} + +QMirClientScreen *QMirClientScreenObserver::findScreenWithId(const QList<QMirClientScreen *> &list, int id) +{ + Q_FOREACH (const auto screen, list) { + if (screen->mirOutputId() == id) { + return screen; + } + } + return nullptr; +} + +void QMirClientScreenObserver::handleScreenPropertiesChange(QMirClientScreen *screen, int dpi, + MirFormFactor formFactor, float scale) +{ + screen->setAdditionalMirDisplayProperties(scale, formFactor, dpi); +} + |