431 lines
14 KiB
C++
431 lines
14 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include <QHash>
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#include "diagramscene.h"
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DiagramScene::DiagramScene(QMenu *itemMenu, QObject *parent)
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: QGraphicsScene(parent)
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{
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myItemMenu = itemMenu;
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myMode = MoveItem;
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line = 0;
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textItem = 0;
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myItemColor = Qt::white;
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myTextColor = Qt::black;
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myLineColor = Qt::black;
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snapToGrid=1;
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myGrid=10;
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myPolygonPath=0;
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myCorners=0;
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TitleText = new DiagramTextItem(0,0,1,0xFFF,255,"BLOCK NAME HERE (not visible)",
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QPointF(250,250));
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addItem(TitleText);
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}
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void DiagramScene::editorLostFocus(DiagramTextItem *item)
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{
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QTextCursor cursor = item->textCursor();
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cursor.clearSelection();
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item->setTextCursor(cursor);
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if (item->toPlainText().isEmpty()) {
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removeItem(item);
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item->deleteLater();
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}
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}
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void DiagramScene::drawBackground(QPainter *p, const QRectF &r)
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{
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p -> save();
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p -> setRenderHint(QPainter::Antialiasing, false);
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p -> setRenderHint(QPainter::TextAntialiasing, true);
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p -> setRenderHint(QPainter::SmoothPixmapTransform, false);
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p -> setPen(Qt::NoPen);
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p -> setBrush(Qt::white);
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p -> drawRect(r);
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p -> setPen(Qt::gray);
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p -> setBrush(Qt::NoBrush);
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qreal limite_x = r.x() + r.width();
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qreal limite_y = r.y() + r.height();
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int g_x = (int)ceil(r.x());
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while (g_x % myGrid) ++ g_x;
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int g_y = (int)ceil(r.y());
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while (g_y % myGrid) ++ g_y;
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QPolygon points;
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for (int gx = g_x ; gx < limite_x ; gx += myGrid) {
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for (int gy = g_y ; gy < limite_y ; gy += myGrid) {
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points << QPoint(gx, gy);
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}
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}
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p -> drawPoints(points);
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p->drawLine(500,0,500,1000);
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p->drawLine(0,500,1000,500);
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p -> restore();
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}
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void DiagramScene::doSnapToGrid(QGraphicsSceneMouseEvent *mouseEvent)
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{
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if(snapToGrid){
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mouseEvent->setScenePos(QPointF(
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round(mouseEvent->scenePos().x()/myGrid)*myGrid,
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round(mouseEvent->scenePos().y()/myGrid)*myGrid
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));
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}
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}
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void DiagramScene::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent)
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{
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doSnapToGrid(mouseEvent);
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QString Text;
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if (mouseEvent->button() != Qt::LeftButton)
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return;
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switch (myMode)
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{
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case InsertText:
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//TODO: limit text items to 255 maximum
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if(myTextType<256)
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if(myTextType & 0b10000000)
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Text = "IN " +myTypeString;
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else
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Text = "OUT " +myTypeString;
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else
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Text = myTypeString;
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textItem = new DiagramTextItem(0,0,1,myTextType,0,Text,
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mouseEvent->scenePos());
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if(addTextItem(textItem))
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{
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textItem->setZValue(1000.0);
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connect(textItem, SIGNAL(lostFocus(DiagramTextItem*)),
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this, SLOT(editorLostFocus(DiagramTextItem*)));
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addItem(textItem);
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}
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else
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{
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delete(textItem);
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QMessageBox::warning(0,"Full","The block can only have only"
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"255 text items");
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}
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emit textInserted(textItem);
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break;
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case EditPolygon:
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if(line == 0 && items().indexOf(myPolygonPath)==-1)
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{
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line = new QGraphicsLineItem(QLineF(mouseEvent->scenePos(),
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mouseEvent->scenePos()));
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line->setPen(QPen(Qt::blue, 2));
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line->setZValue(1000.0);
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addItem(line);
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}
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else if(line != 0 && items().indexOf(myPolygonPath)==-1 &&
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line->line().length()>5)
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{
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myPolygonPath = new Arrow(line->line().p1(),line->line().p2(),
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0,this);
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QLineF newLine(line->line().p2(),line->line().p2());
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line->setLine(newLine);
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}
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else if(line != 0 && items().indexOf(myPolygonPath)!=-1 &&
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line->line().length()>5)
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{
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myPolygonPath->createCorner(line->line().p1(),myCorners);
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myPolygonPath->setEndPoint(line->line().p2());
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myPolygonPath->updatePosition();
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QLineF newLine(line->line().p2(),line->line().p2());
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line->setLine(newLine);
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myCorners++;
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}
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case MoveItem:
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QGraphicsScene::mousePressEvent(mouseEvent);
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break;
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default: ;
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}
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}
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void DiagramScene::mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent)
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{
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doSnapToGrid(mouseEvent);
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if (myMode == EditPolygon && line != 0 )
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{
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QLineF newLine(line->line().p1(), mouseEvent->scenePos());
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line->setLine(newLine);
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}
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QGraphicsScene::mouseMoveEvent(mouseEvent);
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}
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void DiagramScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *mouseEvent)
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{
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doSnapToGrid(mouseEvent);
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if (myMode == EditPolygon && line != 0 && myCorners>0)
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{
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if(myPolygonPath->getStartPoint()!=line->line().p2())
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myPolygonPath->createCorner(line->line().p2(),myCorners);
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myPolygonPath->setEndPoint(myPolygonPath->getStartPoint());
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myPolygonPath->createFirstCorner();
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myPolygonPath->updatePosition();
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myCorners=0;
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removeItem(line);
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line = 0;
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myMode = MoveItem;
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emit textInserted(textItem);//Is the same for all buttons
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}
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else if (myMode != EditPolygon)
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{
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QGraphicsScene::mouseDoubleClickEvent(mouseEvent);
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}
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}
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void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
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{
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doSnapToGrid(mouseEvent);
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if (myMode != EditPolygon && line == 0)
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QGraphicsScene::mouseReleaseEvent(mouseEvent);
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}
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bool DiagramScene::isItemChange(int type)
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{
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foreach (QGraphicsItem *item, selectedItems()) {
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if (item->type() == type)
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return true;
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}
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return false;
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}
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QDomDocument DiagramScene::toXmlFormat()
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{
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QDomDocument document;
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QDomComment initialComments=document.createComment(
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"File for SIE Code Generator. Custmos Blocks");
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document.appendChild(initialComments);
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QDomElement diagram = document.createElement("CustomItem");
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diagram.setAttribute("BlockName",TitleText->toPlainText());
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document.appendChild(diagram);
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//Lists of items
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QList<DiagramTextItem *> Items;
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QList<Arrow *> Arrows;
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foreach(QGraphicsItem *item, items())
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{
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if(item->type() == DiagramTextItem::Type)
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Items.append(qgraphicsitem_cast<DiagramTextItem *>(item));
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else if(item->type() == Arrow::Type)
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Arrows.append(qgraphicsitem_cast<Arrow *>(item));
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}
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if(Arrows.count()>1) {printf("Something is wrong.\n"); fflush(stdout);}
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//Create the XML structure
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diagram.appendChild(myPolygonPath->toXml(document));
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QDomElement element;
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if(Items.count()>0)
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{
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QDomElement textItems = document.createElement("TextItems");
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foreach(DiagramTextItem *item, Items)
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{
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if(item->styleIO() != 0xFFF)
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{
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element = item->toXml(document);
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element.setAttribute("ID",textItemsByID.key(item));
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textItems.appendChild(element);
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}
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}
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diagram.appendChild(textItems);
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}
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return(document);
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}
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int DiagramScene::fromXmlFormat(QDomDocument document)
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{
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//Read items TODO: in future... add multi items on same file
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QDomNodeList customsItems = document.elementsByTagName("CustomItem");
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if(!customsItems.at(0).isElement())
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return -1;
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//Load the first item in the document
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QDomElement customItem = customsItems.at(0).toElement();
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if(customItem.attribute("BlockName")=="")
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TitleText->setPlainText("Please set Block Name");
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else
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TitleText->setPlainText(customItem.attribute("BlockName"));
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TitleText->updatePosition();
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for (QDomNode node = customItem.firstChild() ;
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!node.isNull() ;
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node = node.nextSibling())
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{
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QDomElement element = node.toElement();
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if(element.tagName()=="Polygon")
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{
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QList<QPointF> points;
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for (QDomNode node = element.firstChild() ;
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!node.isNull() ;
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node = node.nextSibling())
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{
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QDomElement point = node.toElement();
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if(point.tagName()!="Point")
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return -1;
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points.append(QPointF((QPointF(point.attribute("x").toFloat(),0)
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+QPointF(500,500)).x(),
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(QPointF(0,point.attribute("y").toFloat())
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+QPointF(500,500)).y()));
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}
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if(points.count()>0)
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{
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myPolygonPath = new Arrow(points.at(0),points.at(0),0,this);
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for(int i=1; i< points.count();i++)
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{
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myPolygonPath->createCorner(points.at(i),i-1);
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}
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myPolygonPath->createFirstCorner();
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myPolygonPath->updatePosition();
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}
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}
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else if(element.tagName()=="TextItems")
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{
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for (QDomNode node = element.firstChild() ;
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!node.isNull() ;
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node = node.nextSibling())
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{
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QDomElement textItemE = node.toElement();
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if(textItemE.tagName()!="TextItem")
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return -1;
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int myStyleIO = textItemE.attribute("myStyleIO").toInt();
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int myID = textItemE.attribute("ID").toInt();
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bool editableItem = textItemE.attribute("editableItem").toInt();
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QPointF posOffset=
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QPointF((QPointF(textItemE.attribute("posOffset-x")
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.toFloat(),0)+QPointF(500,500)).x(),
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(-QPointF(0,textItemE.attribute("posOffset-y")
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.toFloat())+QPointF(500,500)).y());
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QString itemString=textItemE.attribute("text");
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if(myStyleIO==0)
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{
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if(!editableItem)
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myStyleIO=256;
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else
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myStyleIO=257;
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}
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DiagramTextItem * newTextItem =
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new DiagramTextItem(0,0,1,myStyleIO,myID,itemString,posOffset);
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newTextItem->setZValue(1000.0);
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connect(newTextItem, SIGNAL(lostFocus(DiagramTextItem*)),
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this, SLOT(editorLostFocus(DiagramTextItem*)));
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addItem(newTextItem);
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textItemsByID.insert(myID,newTextItem);
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}
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}
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}
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return 1;
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}
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void DiagramScene::cleanScene()
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{
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//Lists of items
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QList<DiagramTextItem *> Items;
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foreach(QGraphicsItem *item, items())
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{
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if(item->type() == DiagramTextItem::Type)
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Items.append(qgraphicsitem_cast<DiagramTextItem *>(item));
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}
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//Remove Diagram Text Items
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foreach(DiagramTextItem *item, Items)
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{
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if(item->styleIO() != 0xFFF)
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{
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removeItem(item);
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delete(item);
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}
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}
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//Remove Polygon Path
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if(items().indexOf(myPolygonPath)!=-1)
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{
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myPolygonPath->removeLines();
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removeItem(myPolygonPath);
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delete(myPolygonPath);
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}
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TitleText->setPlainText("BLOCK NAME HERE (not visible)");
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TitleText->updatePosition();
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}
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int DiagramScene::addTextItem(DiagramTextItem * textItem)
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{
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for(int i=0; i<255; i++)
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{
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QHash<int,DiagramTextItem *>::iterator iter= textItemsByID.find(i);
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if(iter==textItemsByID.end())
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{
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textItemsByID.insert(i,textItem);
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return 1;
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}
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}
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return 0;
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}
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void DiagramScene::removeTextItem(DiagramTextItem * textItem)
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{
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textItemsByID.remove(textItemsByID.key(textItem));
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}
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