--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/boxes/qtbox.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,480 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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 = qgraphicsitem_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 = qgraphicsitem_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 = qgraphicsitem_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 = qgraphicsitem_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;
+}
+
+int ItemBase::type() const
+{
+ return Type;
+}
+
+
+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].setX(i & 1 ? 0.5f : -0.5f);
+ m_vertices[i].setY(i & 2 ? 0.5f : -0.5f);
+ m_vertices[i].setZ(i & 4 ? 0.5f : -0.5f);
+ }
+ for (int i = 0; i < 4; ++i) {
+ m_texCoords[i].setX(i & 1 ? 1.0f : 0.0f);
+ m_texCoords[i].setY(i & 2 ? 1.0f : 0.0f);
+ }
+ m_normals[0] = QVector3D(-1.0f, 0.0f, 0.0f);
+ m_normals[1] = QVector3D(1.0f, 0.0f, 0.0f);
+ m_normals[2] = QVector3D(0.0f, -1.0f, 0.0f);
+ m_normals[3] = QVector3D(0.0f, 1.0f, 0.0f);
+ m_normals[4] = QVector3D(0.0f, 0.0f, -1.0f);
+ m_normals[5] = QVector3D(0.0f, 0.0f, 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
+ };
+
+ painter->beginNativePainting();
+
+ 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(reinterpret_cast<float *>(&m_normals[2 * dir + 0]));
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 2; ++j) {
+ glTexCoord2fv(reinterpret_cast<float *>(&m_texCoords[(j << 1) | i]));
+ glVertex3fv(reinterpret_cast<float *>(&m_vertices[(i << ((dir + 2) % 3)) | (j << ((dir + 1) % 3))]));
+ }
+ }
+ glEnd();
+
+ glBegin(GL_TRIANGLE_STRIP);
+ glNormal3fv(reinterpret_cast<float *>(&m_normals[2 * dir + 1]));
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 2; ++j) {
+ glTexCoord2fv(reinterpret_cast<float *>(&m_texCoords[(j << 1) | i]));
+ glVertex3fv(reinterpret_cast<float *>(&m_vertices[(1 << dir) | (i << ((dir + 1) % 3)) | (j << ((dir + 2) % 3))]));
+ }
+ }
+ 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();
+
+ painter->endNativePainting();
+
+ 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);
+}