Monster refactor commit.

1 files changed, 220 insertions, 0 deletions

diff --git a/examples/qt3d/graphicsview/modelitem.cpp b/examples/qt3d/graphicsview/modelitem.cpp
new file mode 100644
index 000000000..41ba13833
--- /dev/null
+++ b/examples/qt3d/graphicsview/modelitem.cpp
@@ -0,0 +1,220 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtQuick3D examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "modelitem.h"
+#include "qglpainter.h"
+#include "qgraphicsembedscene.h"
+#include <QtGui/qgraphicssceneevent.h>
+#include <QtGui/qapplication.h>
+
+const qreal CubeSize = 2.0f;
+
+ModelItem::ModelItem(QGraphicsItem *parent)
+    : QGLGraphicsViewportItem(parent)
+    , mScene(0)
+    , mTextureId(0)
+    , navigating(false)
+    , mPressedFace(-1)
+    , pressedButton(Qt::NoButton)
+{
+    startNavCamera = new QGLCamera();
+
+    setFlag(ItemIsFocusable, true);
+}
+
+ModelItem::~ModelItem()
+{
+    delete startNavCamera;
+}
+
+void ModelItem::setScene(QGraphicsEmbedScene *scene)
+{
+    mScene = scene;
+    connect(scene, SIGNAL(changed(QList<QRectF>)), this, SLOT(updateScene()));
+}
+
+void ModelItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    // Render the inner scene into a framebuffer object.
+    // We do this while the ordinary Qt paint engine has
+    // control of the GL context rather than later when the
+    // QGLPainter has control of the GL context.
+    if (mScene)
+        mTextureId = mScene->renderToTexture();
+
+    // Now render the GL parts of the item using QGLPainter.
+    QGLGraphicsViewportItem::paint(painter, option, widget);
+}
+
+void ModelItem::updateScene()
+{
+    update();
+}
+
+void ModelItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    int face;
+    QPointF tc = intersection
+        (event->widget(), event->pos().toPoint(), &face);
+    if (!navigating && mPressedFace == -1 && face != -1) {
+        mPressedFace = face;
+        pressedButton = event->button();
+        mScene->deliverEvent(event, tc);
+        return;
+    } else if (!navigating && face == -1) {
+        navigating = true;
+        pressedButton = event->button();
+        pressedPos = event->pos().toPoint();
+        startNavCamera->setEye(camera()->eye());
+        startNavCamera->setCenter(camera()->center());
+        startNavCamera->setUpVector(camera()->upVector());
+#ifndef QT_NO_CURSOR
+        setCursor(Qt::ClosedHandCursor);
+#endif
+        return;
+    }
+    QGraphicsItem::mousePressEvent(event);
+}
+
+void ModelItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (navigating) {
+        QPoint delta = event->pos().toPoint() - pressedPos;
+        int deltax = delta.x();
+        int deltay = delta.y();
+        QGLCamera *camera = this->camera();
+        int rotation = camera->screenRotation();
+        if (rotation == 90 || rotation == 270) {
+            qSwap(deltax, deltay);
+        }
+        if (rotation == 90 || rotation == 180) {
+            deltax = -deltax;
+        }
+        if (rotation == 180 || rotation == 270) {
+            deltay = -deltay;
+        }
+        qreal anglex = deltax * 90.0f / rect().width();
+        qreal angley = deltay * 90.0f / rect().height();
+        QQuaternion q = startNavCamera->pan(-anglex);
+        q *= startNavCamera->tilt(-angley);
+        camera->setEye(startNavCamera->eye());
+        camera->setCenter(startNavCamera->center());
+        camera->setUpVector(startNavCamera->upVector());
+        camera->rotateCenter(q);
+    } else if (mPressedFace != -1) {
+        int face;
+        QPointF tc = intersection
+            (event->widget(), event->pos().toPoint(), &face);
+        if (face != mPressedFace)
+            tc = QPointF(-1, -1);
+        mScene->deliverEvent(event, tc);
+        return;
+    }
+    QGraphicsItem::mouseMoveEvent(event);
+}
+
+void ModelItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (navigating && pressedButton == event->button()) {
+        navigating = false;
+        pressedButton = Qt::NoButton;
+#ifndef QT_NO_CURSOR
+        unsetCursor();
+#endif
+        return;
+    } else if (mPressedFace != -1) {
+        int face;
+        QPointF tc = intersection
+            (event->widget(), event->pos().toPoint(), &face);
+        if (face != mPressedFace)
+            tc = QPoint(-1, -1);
+        if (pressedButton == event->button()) {
+            mPressedFace = -1;
+            pressedButton = Qt::NoButton;
+        }
+        mScene->deliverEvent(event, tc);
+        return;
+    }
+    QGraphicsItem::mouseReleaseEvent(event);
+}
+
+void ModelItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    int face;
+    QPointF tc = intersection
+        (event->widget(), event->pos().toPoint(), &face);
+    if (mPressedFace == -1 && face != -1) {
+        mPressedFace = face;
+        pressedButton = event->button();
+        mScene->deliverEvent(event, tc);
+        return;
+    }
+    QGraphicsItem::mouseDoubleClickEvent(event);
+}
+
+QPointF ModelItem::intersection
+    (QWidget *widget, const QPoint &point, int *actualFace) const
+{
+    // Bail out if no scene.
+    if (!mScene) {
+        *actualFace = -1;
+        return QPointF();
+    }
+
+    // Get the combined matrix for the projection.
+    int dpiX = widget->logicalDpiX();
+    int dpiY = widget->logicalDpiY();
+    QRectF bounds = boundingRect();
+    qreal aspectRatio = (bounds.width() * dpiY) / (bounds.height() * dpiX);
+    QMatrix4x4 proj = camera()->projectionMatrix(aspectRatio);
+
+    // Find the relative position of the point within (-1, -1) to (1, 1).
+    QPointF relativePoint =
+        QPointF((point.x() - bounds.center().x()) * 2 / bounds.width(),
+                -(point.y() - bounds.center().y()) * 2 / bounds.height());
+
+    // Get the ray extending from the eye through the point the user selected.
+    QVector3D eyept = proj.inverted().map
+        (QVector3D(relativePoint.x(), relativePoint.y(), -1.0f));
+    QRay3D ray(QVector3D(0, 0, 0), eyept);
+
+    // Intersect with the ray using a model-specific intersection method.
+    return intersection(ray, actualFace);
+}