QInputAspect: launch an axis/action update frame

Change-Id: I78038ed7a559647db87be800a8fe2d080da3620c
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 145 insertions, 0 deletions

diff --git a/src/input/backend/updateaxisactionjob.cpp b/src/input/backend/updateaxisactionjob.cpp
new file mode 100644
index 000000000..9270a1df7
--- /dev/null
+++ b/src/input/backend/updateaxisactionjob.cpp
@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D 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 "updateaxisactionjob_p.h"
+#include <Qt3DInput/private/inputhandler_p.h>
+#include <Qt3DInput/private/inputmanagers_p.h>
+#include <Qt3DInput/qabstractphysicaldevicebackendnode.h>
+#include <Qt3DInput/qinputdeviceintegration.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DInput {
+
+namespace Input {
+
+namespace {
+
+bool anyOfRequiredKeysPressed(qint64 keys, QAbstractPhysicalDeviceBackendNode *physicalDeviceBackend)
+{
+    bool validKeyWasPressed = false;
+    for (int i = 0; i < 64; ++i) {
+        const int individualBit = (1 << i);
+        if ((individualBit & keys) && physicalDeviceBackend->isButtonPressed(individualBit))
+            validKeyWasPressed = true;
+        break;
+    }
+    return validKeyWasPressed;
+}
+
+} // anonymous
+
+UpdateAxisActionJob::UpdateAxisActionJob(InputHandler *handler, HLogicalDevice handle)
+    : Qt3DCore::QAspectJob()
+    , m_handler(handler)
+    , m_handle(handle)
+{
+}
+
+void UpdateAxisActionJob::run()
+{
+    // Note: we assume axis/action are not really shared:
+    // there's no benefit in sharing those when it comes to computing
+    LogicalDevice *device = m_handler->logicalDeviceManager()->data(m_handle);
+    updateAction(device);
+    updateAxis(device);
+}
+
+void UpdateAxisActionJob::updateAction(LogicalDevice *device)
+{
+    Q_FOREACH (const Qt3DCore::QNodeId actionId, device->actions()) {
+        bool actionTriggered = false;
+        Action *action = m_handler->actionManager()->lookupResource(actionId);
+
+        Q_FOREACH (const Qt3DCore::QNodeId actionInputId, action->inputs()) {
+            ActionInput *actionInput = m_handler->actionInputManager()->lookupResource(actionInputId);
+            QAbstractPhysicalDeviceBackendNode *physicalDeviceBackend = Q_NULLPTR;
+
+            Q_FOREACH (QInputDeviceIntegration *integration, m_handler->inputDeviceIntegrations()) {
+                if ((physicalDeviceBackend = integration->physicalDevice(actionInput->sourceDevice())) != Q_NULLPTR)
+                    break;
+            }
+
+            if (physicalDeviceBackend != Q_NULLPTR) {
+                // Update the value
+                actionTriggered |= anyOfRequiredKeysPressed(actionInput->keys(), physicalDeviceBackend);
+            }
+        }
+
+        action->setActionTriggered(actionTriggered);
+    }
+}
+
+void UpdateAxisActionJob::updateAxis(LogicalDevice *device)
+{
+    Q_FOREACH (const Qt3DCore::QNodeId axisId, device->axes()) {
+        Axis *axis = m_handler->axisManager()->lookupResource(axisId);
+        float axisValue = 0.0f;
+
+        Q_FOREACH (const Qt3DCore::QNodeId axisInputId, axis->inputs()) {
+            AxisInput *axisInput = m_handler->axisInputManager()->lookupResource(axisInputId);
+            QAbstractPhysicalDeviceBackendNode *physicalDeviceBackend = Q_NULLPTR;
+
+            Q_FOREACH (QInputDeviceIntegration *integration, m_handler->inputDeviceIntegrations()) {
+                if ((physicalDeviceBackend = integration->physicalDevice(axisInput->sourceDevice())) != Q_NULLPTR)
+                    break;
+            }
+
+            if (physicalDeviceBackend != Q_NULLPTR) {
+                // Update the value
+                const qint64 keys = axisInput->keys();
+                // Axis was specified -> we take this as the base value
+                if (axisInput->axis() != -1)
+                    axisValue += physicalDeviceBackend->axisValue(axisInput->axis());
+                else if (keys != 0) {
+                    // TO DO: Linear Curver for the progression of the scale value
+                    if (anyOfRequiredKeysPressed(keys, physicalDeviceBackend))
+                        axisValue += axisInput->scale();
+                }
+            }
+        }
+
+        // Clamp the axisValue -1/1
+        axisValue = qMin(1.0f, qMax(axisValue, -1.0f));
+        axis->setAxisValue(axisValue);
+    }
+}
+
+} // Input
+
+} // Qt3DInput
+
+QT_END_NAMESPACE