Long live Qt!

1 files changed, 469 insertions, 0 deletions

diff --git a/demos/boxes/qtbox.cpp b/demos/boxes/qtbox.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qtbox.h"
+
+const qreal ROTATE_SPEED_X = 30.0 / 1000.0;
+const qreal ROTATE_SPEED_Y = 20.0 / 1000.0;
+const qreal ROTATE_SPEED_Z = 40.0 / 1000.0;
+const int MAX_ITEM_SIZE = 512;
+const int MIN_ITEM_SIZE = 16;
+
+//============================================================================//
+//                                  ItemBase                                  //
+//============================================================================//
+
+ItemBase::ItemBase(int size, int x, int y) : m_size(size), m_isResizing(false)
+{
+    setFlag(QGraphicsItem::ItemIsMovable, true);
+    setFlag(QGraphicsItem::ItemIsSelectable, true);
+    setFlag(QGraphicsItem::ItemIsFocusable, true);
+    setAcceptHoverEvents(true);
+    setPos(x, y);
+    m_startTime = QTime::currentTime();
+}
+
+ItemBase::~ItemBase()
+{
+}
+
+QRectF ItemBase::boundingRect() const
+{
+    return QRectF(-m_size / 2, -m_size / 2, m_size, m_size);
+}
+
+void ItemBase::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
+{
+    if (option->state & QStyle::State_Selected) {
+        painter->setRenderHint(QPainter::Antialiasing, true);
+        if (option->state & QStyle::State_HasFocus)
+            painter->setPen(Qt::yellow);
+        else
+            painter->setPen(Qt::white);
+        painter->drawRect(boundingRect());
+
+        painter->drawLine(m_size / 2 - 9, m_size / 2, m_size / 2, m_size / 2 - 9);
+        painter->drawLine(m_size / 2 - 6, m_size / 2, m_size / 2, m_size / 2 - 6);
+        painter->drawLine(m_size / 2 - 3, m_size / 2, m_size / 2, m_size / 2 - 3);
+
+        painter->setRenderHint(QPainter::Antialiasing, false);
+    }
+}
+
+void ItemBase::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
+{
+    if (!isSelected() && scene()) {
+        scene()->clearSelection();
+        setSelected(true);
+    }
+
+    QMenu menu;
+    QAction *delAction = menu.addAction("Delete");
+    QAction *newAction = menu.addAction("New");
+    QAction *growAction = menu.addAction("Grow");
+    QAction *shrinkAction = menu.addAction("Shrink");
+
+    QAction *selectedAction = menu.exec(event->screenPos());
+
+    if (selectedAction == delAction)
+        deleteSelectedItems(scene());
+    else if (selectedAction == newAction)
+        duplicateSelectedItems(scene());
+    else if (selectedAction == growAction)
+        growSelectedItems(scene());
+    else if (selectedAction == shrinkAction)
+        shrinkSelectedItems(scene());
+}
+
+void ItemBase::duplicateSelectedItems(QGraphicsScene *scene)
+{
+    if (!scene)
+        return;
+
+    QList<QGraphicsItem *> selected;
+    selected = scene->selectedItems();
+
+    foreach (QGraphicsItem *item, selected) {
+        ItemBase *itemBase = dynamic_cast<ItemBase *>(item);
+        if (itemBase)
+            scene->addItem(itemBase->createNew(itemBase->m_size, itemBase->pos().x() + itemBase->m_size, itemBase->pos().y()));
+    }
+}
+
+void ItemBase::deleteSelectedItems(QGraphicsScene *scene)
+{
+    if (!scene)
+        return;
+
+    QList<QGraphicsItem *> selected;
+    selected = scene->selectedItems();
+
+    foreach (QGraphicsItem *item, selected) {
+        ItemBase *itemBase = dynamic_cast<ItemBase *>(item);
+        if (itemBase)
+            delete itemBase;
+    }
+}
+
+void ItemBase::growSelectedItems(QGraphicsScene *scene)
+{
+    if (!scene)
+        return;
+
+    QList<QGraphicsItem *> selected;
+    selected = scene->selectedItems();
+
+    foreach (QGraphicsItem *item, selected) {
+        ItemBase *itemBase = dynamic_cast<ItemBase *>(item);
+        if (itemBase) {
+            itemBase->prepareGeometryChange();
+            itemBase->m_size *= 2;
+            if (itemBase->m_size > MAX_ITEM_SIZE)
+                itemBase->m_size = MAX_ITEM_SIZE;
+        }
+    }
+}
+
+void ItemBase::shrinkSelectedItems(QGraphicsScene *scene)
+{
+    if (!scene)
+        return;
+
+    QList<QGraphicsItem *> selected;
+    selected = scene->selectedItems();
+
+    foreach (QGraphicsItem *item, selected) {
+        ItemBase *itemBase = dynamic_cast<ItemBase *>(item);
+        if (itemBase) {
+            itemBase->prepareGeometryChange();
+            itemBase->m_size /= 2;
+            if (itemBase->m_size < MIN_ITEM_SIZE)
+                itemBase->m_size = MIN_ITEM_SIZE;
+        }
+    }
+}
+
+void ItemBase::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (m_isResizing) {
+        int dx = int(2.0 * event->pos().x());
+        int dy = int(2.0 * event->pos().y());
+        prepareGeometryChange();
+        m_size = (dx > dy ? dx : dy);
+        if (m_size < MIN_ITEM_SIZE)
+            m_size = MIN_ITEM_SIZE;
+        else if (m_size > MAX_ITEM_SIZE)
+            m_size = MAX_ITEM_SIZE;
+    } else {
+        QGraphicsItem::mouseMoveEvent(event);
+    }
+}
+
+void ItemBase::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    if (m_isResizing || (isInResizeArea(event->pos()) && isSelected()))
+        setCursor(Qt::SizeFDiagCursor);
+    else
+        setCursor(Qt::ArrowCursor);
+    QGraphicsItem::hoverMoveEvent(event);
+}
+
+void ItemBase::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    static qreal z = 0.0;
+    setZValue(z += 1.0);
+    if (event->button() == Qt::LeftButton && isInResizeArea(event->pos())) {
+        m_isResizing = true;
+    } else {
+        QGraphicsItem::mousePressEvent(event);
+    }
+}
+
+void ItemBase::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton && m_isResizing) {
+        m_isResizing = false;
+    } else {
+        QGraphicsItem::mouseReleaseEvent(event);
+    }
+}
+
+void ItemBase::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Delete:
+        deleteSelectedItems(scene());
+        break;
+    case Qt::Key_Insert:
+        duplicateSelectedItems(scene());
+        break;
+    case Qt::Key_Plus:
+        growSelectedItems(scene());
+        break;
+    case Qt::Key_Minus:
+        shrinkSelectedItems(scene());
+        break;
+    default:
+        QGraphicsItem::keyPressEvent(event);
+        break;
+    }
+}
+
+void ItemBase::wheelEvent(QGraphicsSceneWheelEvent *event)
+{
+    prepareGeometryChange();
+    m_size = int(m_size * exp(-event->delta() / 600.0));
+    if (m_size > MAX_ITEM_SIZE)
+        m_size = MAX_ITEM_SIZE;
+    else if (m_size < MIN_ITEM_SIZE)
+        m_size = MIN_ITEM_SIZE;
+}
+
+bool ItemBase::isInResizeArea(const QPointF &pos)
+{
+    return (-pos.y() < pos.x() - m_size + 9);
+}
+
+//============================================================================//
+//                                    QtBox                                   //
+//============================================================================//
+
+QtBox::QtBox(int size, int x, int y) : ItemBase(size, x, y), m_texture(0)
+{
+    for (int i = 0; i < 8; ++i) {
+        m_vertices[i][0] = (i & 1 ? 0.5f : -0.5f);
+        m_vertices[i][1] = (i & 2 ? 0.5f : -0.5f);
+        m_vertices[i][2] = (i & 4 ? 0.5f : -0.5f);
+    }
+    for (int i = 0; i < 4; ++i) {
+        m_texCoords[i][0] = (i & 1 ? 1.0f : 0.0f);
+        m_texCoords[i][1] = (i & 2 ? 1.0f : 0.0f);
+    }
+    memset(m_normals, 0, sizeof(m_normals));
+    for (int i = 0; i < 3; ++i) {
+        m_normals[2 * i + 0][i] = -1.0f;
+        m_normals[2 * i + 1][i] = 1.0f;
+    }
+}
+
+QtBox::~QtBox()
+{
+    if (m_texture)
+        delete m_texture;
+}
+
+ItemBase *QtBox::createNew(int size, int x, int y)
+{
+    return new QtBox(size, x, y);
+}
+
+void QtBox::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    QRectF rect = boundingRect().translated(pos());
+    float width = float(painter->device()->width());
+    float height = float(painter->device()->height());
+
+    float left = 2.0f * float(rect.left()) / width - 1.0f;
+    float right = 2.0f * float(rect.right()) / width - 1.0f;
+    float top = 1.0f - 2.0f * float(rect.top()) / height;
+    float bottom = 1.0f - 2.0f * float(rect.bottom()) / height;
+    float moveToRectMatrix[] = {
+        0.5f * (right - left), 0.0f, 0.0f, 0.0f,
+        0.0f, 0.5f * (bottom - top), 0.0f, 0.0f,
+        0.0f, 0.0f, 1.0f, 0.0f,
+        0.5f * (right + left), 0.5f * (bottom + top), 0.0f, 1.0f
+    };
+
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadMatrixf(moveToRectMatrix);
+    gluPerspective(60.0, 1.0, 0.01, 10.0);
+
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glLoadIdentity();
+
+    //glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_COLOR_MATERIAL);
+    glEnable(GL_NORMALIZE);
+
+    if(m_texture == 0)
+        m_texture = new GLTexture2D(":/res/boxes/qt-logo.jpg", 64, 64);
+    m_texture->bind();
+    glEnable(GL_TEXTURE_2D);
+
+    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
+    float lightColour[] = {1.0f, 1.0f, 1.0f, 1.0f};
+    float lightDir[] = {0.0f, 0.0f, 1.0f, 0.0f};
+    glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColour);
+    glLightfv(GL_LIGHT0, GL_POSITION, lightDir);
+    glEnable(GL_LIGHT0);
+
+    glTranslatef(0.0f, 0.0f, -1.5f);
+    glRotatef(ROTATE_SPEED_X * m_startTime.msecsTo(QTime::currentTime()), 1.0f, 0.0f, 0.0f);
+    glRotatef(ROTATE_SPEED_Y * m_startTime.msecsTo(QTime::currentTime()), 0.0f, 1.0f, 0.0f);
+    glRotatef(ROTATE_SPEED_Z * m_startTime.msecsTo(QTime::currentTime()), 0.0f, 0.0f, 1.0f);
+    int dt = m_startTime.msecsTo(QTime::currentTime());
+    if (dt < 500)
+        glScalef(dt / 500.0f, dt / 500.0f, dt / 500.0f);
+
+    for (int dir = 0; dir < 3; ++dir) {
+        glColor4f(1.0f, 1.0f, 1.0f, 1.0);
+
+        glBegin(GL_TRIANGLE_STRIP);
+        glNormal3fv(m_normals[2 * dir + 0].bits());
+        for (int i = 0; i < 2; ++i) {
+            for (int j = 0; j < 2; ++j) {
+                glTexCoord2fv(m_texCoords[(j << 1) | i].bits());
+                glVertex3fv(m_vertices[(i << ((dir + 2) % 3)) | (j << ((dir + 1) % 3))].bits());
+            }
+        }
+        glEnd();
+
+        glBegin(GL_TRIANGLE_STRIP);
+        glNormal3fv(m_normals[2 * dir + 1].bits());
+        for (int i = 0; i < 2; ++i) {
+            for (int j = 0; j < 2; ++j) {
+                glTexCoord2fv(m_texCoords[(j << 1) | i].bits());
+                glVertex3fv(m_vertices[(1 << dir) | (i << ((dir + 1) % 3)) | (j << ((dir + 2) % 3))].bits());
+            }
+        }
+        glEnd();
+    }
+    m_texture->unbind();
+
+    //glDisable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_LIGHTING);
+    glDisable(GL_COLOR_MATERIAL);
+    glDisable(GL_TEXTURE_2D);
+    glDisable(GL_LIGHT0);
+    glDisable(GL_NORMALIZE);
+
+    glPopMatrix();
+
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+
+    ItemBase::paint(painter, option, widget);
+}
+
+//============================================================================//
+//                                 CircleItem                                 //
+//============================================================================//
+
+CircleItem::CircleItem(int size, int x, int y) : ItemBase(size, x, y)
+{
+     m_color = QColor::fromHsv(rand() % 360, 255, 255);
+}
+
+void CircleItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    int dt = m_startTime.msecsTo(QTime::currentTime());
+
+    qreal r0 = 0.5 * m_size * (1.0 - exp(-0.001 * ((dt + 3800) % 4000)));
+    qreal r1 = 0.5 * m_size * (1.0 - exp(-0.001 * ((dt + 0) % 4000)));
+    qreal r2 = 0.5 * m_size * (1.0 - exp(-0.001 * ((dt + 1800) % 4000)));
+    qreal r3 = 0.5 * m_size * (1.0 - exp(-0.001 * ((dt + 2000) % 4000)));
+
+    if (r0 > r1)
+        r0 = 0.0;
+    if (r2 > r3)
+        r2 = 0.0;
+
+    QPainterPath path;
+    path.moveTo(r1, 0.0);
+    path.arcTo(-r1, -r1, 2 * r1, 2 * r1, 0.0, 360.0);
+    path.lineTo(r0, 0.0);
+    path.arcTo(-r0, -r0, 2 * r0, 2 * r0, 0.0, -360.0);
+    path.closeSubpath();
+    path.moveTo(r3, 0.0);
+    path.arcTo(-r3, -r3, 2 * r3, 2 * r3, 0.0, 360.0);
+    path.lineTo(r0, 0.0);
+    path.arcTo(-r2, -r2, 2 * r2, 2 * r2, 0.0, -360.0);
+    path.closeSubpath();
+    painter->setRenderHint(QPainter::Antialiasing, true);
+    painter->setBrush(QBrush(m_color));
+    painter->setPen(Qt::NoPen);
+    painter->drawPath(path);
+    painter->setBrush(Qt::NoBrush);
+    painter->setPen(Qt::SolidLine);
+    painter->setRenderHint(QPainter::Antialiasing, false);
+
+    ItemBase::paint(painter, option, widget);
+}
+
+ItemBase *CircleItem::createNew(int size, int x, int y)
+{
+    return new CircleItem(size, x, y);
+}
+
+//============================================================================//
+//                                 SquareItem                                 //
+//============================================================================//
+
+SquareItem::SquareItem(int size, int x, int y) : ItemBase(size, x, y)
+{
+    m_image = QPixmap(":/res/boxes/square.jpg");
+}
+
+void SquareItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    int dt = m_startTime.msecsTo(QTime::currentTime());
+    QTransform oldTransform = painter->worldTransform();
+    int dtMod = dt % 2000;
+    qreal amp = 0.002 * (dtMod < 1000 ? dtMod : 2000 - dtMod) - 1.0;
+
+    qreal scale = 0.6 + 0.2 * amp * amp;
+    painter->setWorldTransform(QTransform().rotate(15.0 * amp).scale(scale, scale), true);
+
+    painter->drawPixmap(-m_size / 2, -m_size / 2, m_size, m_size, m_image);
+
+    painter->setWorldTransform(oldTransform, false);
+    ItemBase::paint(painter, option, widget);
+}
+
+ItemBase *SquareItem::createNew(int size, int x, int y)
+{
+    return new SquareItem(size, x, y);
+}