diff options
author | Gabriel de Dietrich <gabriel.dietrich-de@nokia.com> | 2012-08-17 13:23:19 +0200 |
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committer | Qt by Nokia <qt-info@nokia.com> | 2012-08-20 12:20:55 +0200 |
commit | 806dda08d685bc5f9ed71dfe8b61f21848d48066 (patch) | |
tree | a63533a1c4a335ae17adc105abb0ae4e62e2f26e /examples/graphicsview/elasticnodes/node.cpp | |
parent | 9f942014e31842b512c3198de035d041c59f54a9 (diff) |
Moving .qdoc files under examples/widgets/doc
Updated those .qdoc files to refer to the new relative examples
emplacement. Images and snippets to be moved later.
Also grouped all widgets related examples under widgets.
Change-Id: Ib29696e2d8948524537f53e8dda88f9ee26a597f
Reviewed-by: J-P Nurmi <j-p.nurmi@nokia.com>
Diffstat (limited to 'examples/graphicsview/elasticnodes/node.cpp')
-rw-r--r-- | examples/graphicsview/elasticnodes/node.cpp | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/examples/graphicsview/elasticnodes/node.cpp b/examples/graphicsview/elasticnodes/node.cpp deleted file mode 100644 index dad226a5e6..0000000000 --- a/examples/graphicsview/elasticnodes/node.cpp +++ /dev/null @@ -1,212 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the 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 <QGraphicsScene> -#include <QGraphicsSceneMouseEvent> -#include <QPainter> -#include <QStyleOption> - -#include "edge.h" -#include "node.h" -#include "graphwidget.h" - -//! [0] -Node::Node(GraphWidget *graphWidget) - : graph(graphWidget) -{ - setFlag(ItemIsMovable); - setFlag(ItemSendsGeometryChanges); - setCacheMode(DeviceCoordinateCache); - setZValue(-1); -} -//! [0] - -//! [1] -void Node::addEdge(Edge *edge) -{ - edgeList << edge; - edge->adjust(); -} - -QList<Edge *> Node::edges() const -{ - return edgeList; -} -//! [1] - -//! [2] -void Node::calculateForces() -{ - if (!scene() || scene()->mouseGrabberItem() == this) { - newPos = pos(); - return; - } -//! [2] - -//! [3] - // Sum up all forces pushing this item away - qreal xvel = 0; - qreal yvel = 0; - foreach (QGraphicsItem *item, scene()->items()) { - Node *node = qgraphicsitem_cast<Node *>(item); - if (!node) - continue; - - QPointF vec = mapToItem(node, 0, 0); - qreal dx = vec.x(); - qreal dy = vec.y(); - double l = 2.0 * (dx * dx + dy * dy); - if (l > 0) { - xvel += (dx * 150.0) / l; - yvel += (dy * 150.0) / l; - } - } -//! [3] - -//! [4] - // Now subtract all forces pulling items together - double weight = (edgeList.size() + 1) * 10; - foreach (Edge *edge, edgeList) { - QPointF vec; - if (edge->sourceNode() == this) - vec = mapToItem(edge->destNode(), 0, 0); - else - vec = mapToItem(edge->sourceNode(), 0, 0); - xvel -= vec.x() / weight; - yvel -= vec.y() / weight; - } -//! [4] - -//! [5] - if (qAbs(xvel) < 0.1 && qAbs(yvel) < 0.1) - xvel = yvel = 0; -//! [5] - -//! [6] - QRectF sceneRect = scene()->sceneRect(); - newPos = pos() + QPointF(xvel, yvel); - newPos.setX(qMin(qMax(newPos.x(), sceneRect.left() + 10), sceneRect.right() - 10)); - newPos.setY(qMin(qMax(newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10)); -} -//! [6] - -//! [7] -bool Node::advance() -{ - if (newPos == pos()) - return false; - - setPos(newPos); - return true; -} -//! [7] - -//! [8] -QRectF Node::boundingRect() const -{ - qreal adjust = 2; - return QRectF( -10 - adjust, -10 - adjust, - 23 + adjust, 23 + adjust); -} -//! [8] - -//! [9] -QPainterPath Node::shape() const -{ - QPainterPath path; - path.addEllipse(-10, -10, 20, 20); - return path; -} -//! [9] - -//! [10] -void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *) -{ - painter->setPen(Qt::NoPen); - painter->setBrush(Qt::darkGray); - painter->drawEllipse(-7, -7, 20, 20); - - QRadialGradient gradient(-3, -3, 10); - if (option->state & QStyle::State_Sunken) { - gradient.setCenter(3, 3); - gradient.setFocalPoint(3, 3); - gradient.setColorAt(1, QColor(Qt::yellow).light(120)); - gradient.setColorAt(0, QColor(Qt::darkYellow).light(120)); - } else { - gradient.setColorAt(0, Qt::yellow); - gradient.setColorAt(1, Qt::darkYellow); - } - painter->setBrush(gradient); - - painter->setPen(QPen(Qt::black, 0)); - painter->drawEllipse(-10, -10, 20, 20); -} -//! [10] - -//! [11] -QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value) -{ - switch (change) { - case ItemPositionHasChanged: - foreach (Edge *edge, edgeList) - edge->adjust(); - graph->itemMoved(); - break; - default: - break; - }; - - return QGraphicsItem::itemChange(change, value); -} -//! [11] - -//! [12] -void Node::mousePressEvent(QGraphicsSceneMouseEvent *event) -{ - update(); - QGraphicsItem::mousePressEvent(event); -} - -void Node::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) -{ - update(); - QGraphicsItem::mouseReleaseEvent(event); -} -//! [12] |