#include <qaction.h>#include <qapplication.h>#include <qclipboard.h>#include <qinputdialog.h>#include <qpainter.h>#include <qpopupmenu.h>#include <algorithm>using namespace std;#include "diagramview.h"#include "propertiesdialog.h"DiagramView::DiagramView(QCanvas *canvas, QWidget *parent,                         const char *name)    : QCanvasView(canvas, parent, name){    pendingItem = 0;    activeItem = 0;    minZ = 0;    maxZ = 0;    createActions();}void DiagramView::createActions(){    cutAct = new QAction(tr("Cu&t"), tr("Ctrl+X"), this);    cutAct->setIconSet(QPixmap::fromMimeSource("cut.png"));    connect(cutAct, SIGNAL(activated()), this, SLOT(cut()));    copyAct = new QAction(tr("&Copy"), tr("Ctrl+C"), this);    copyAct->setIconSet(QPixmap::fromMimeSource("copy.png"));    connect(copyAct, SIGNAL(activated()), this, SLOT(copy()));    pasteAct = new QAction(tr("&Paste"), tr("Ctrl+V"), this);    pasteAct->setIconSet(QPixmap::fromMimeSource("paste.png"));    connect(pasteAct, SIGNAL(activated()), this, SLOT(paste()));    deleteAct = new QAction(tr("&Delete"), tr("Del"), this);    deleteAct->setIconSet(QPixmap::fromMimeSource("delete.png"));    connect(deleteAct, SIGNAL(activated()), this, SLOT(del()));    propertiesAct = new QAction(tr("&Properties..."), 0, this);    connect(propertiesAct, SIGNAL(activated()),            this, SLOT(properties()));    addBoxAct = new QAction(tr("Add &Box"), 0, this);    addBoxAct->setIconSet(QPixmap::fromMimeSource("box.png"));    connect(addBoxAct, SIGNAL(activated()), this, SLOT(addBox()));    addLineAct = new QAction(tr("Add &Line"), 0, this);    addLineAct->setIconSet(QPixmap::fromMimeSource("line.png"));    connect(addLineAct, SIGNAL(activated()), this, SLOT(addLine()));    bringToFrontAct = new QAction(tr("Bring to &Front"), 0, this);    bringToFrontAct->setIconSet(            QPixmap::fromMimeSource("bringtofront.png"));    connect(bringToFrontAct, SIGNAL(activated()),            this, SLOT(bringToFront()));    sendToBackAct = new QAction(tr("Send to &Back"), 0, this);    sendToBackAct->setIconSet(            QPixmap::fromMimeSource("sendtoback.png"));    connect(sendToBackAct, SIGNAL(activated()),            this, SLOT(sendToBack()));}void DiagramView::contentsContextMenuEvent(QContextMenuEvent *event){    QPopupMenu contextMenu(this);    if (activeItem) {        cutAct->addTo(&contextMenu);        copyAct->addTo(&contextMenu);        deleteAct->addTo(&contextMenu);        contextMenu.insertSeparator();        bringToFrontAct->addTo(&contextMenu);        sendToBackAct->addTo(&contextMenu);        contextMenu.insertSeparator();        propertiesAct->addTo(&contextMenu);    } else {        pasteAct->addTo(&contextMenu);        contextMenu.insertSeparator();        addBoxAct->addTo(&contextMenu);        addLineAct->addTo(&contextMenu);    }    contextMenu.exec(event->globalPos());}void DiagramView::addBox(){    addItem(new DiagramBox(canvas()));}void DiagramView::addLine(){    addItem(new DiagramLine(canvas()));}void DiagramView::addItem(QCanvasItem *item){    delete pendingItem;    pendingItem = item;    setActiveItem(0);    setCursor(crossCursor);}void DiagramView::contentsMousePressEvent(QMouseEvent *event){    if (event->button() == LeftButton && pendingItem) {        pendingItem->move(event->pos().x(), event->pos().y());        showNewItem(pendingItem);        pendingItem = 0;        unsetCursor();    } else {        QCanvasItemList items = canvas()->collisions(event->pos());        if (items.empty())            setActiveItem(0);        else            setActiveItem(*items.begin());    }    lastPos = event->pos();}void DiagramView::contentsMouseMoveEvent(QMouseEvent *event){    if (event->state() & LeftButton) {        if (activeItem) {            activeItem->moveBy(event->pos().x() - lastPos.x(),                               event->pos().y() - lastPos.y());            lastPos = event->pos();            canvas()->update();        }    }}void DiagramView::contentsMouseDoubleClickEvent(QMouseEvent *event){    if (event->button() == LeftButton && activeItem            && activeItem->rtti() == DiagramBox::RTTI) {        DiagramBox *box = (DiagramBox *)activeItem;        bool ok;        QString newText = QInputDialog::getText(                tr("Diagram"), tr("Enter new text:"),                QLineEdit::Normal, box->text(), &ok, this);        if (ok) {            box->setText(newText);            canvas()->update();        }    }}void DiagramView::bringToFront(){    if (activeItem) {        ++maxZ;        activeItem->setZ(maxZ);        canvas()->update();    }}void DiagramView::sendToBack(){    if (activeItem) {        --minZ;        activeItem->setZ(minZ);        canvas()->update();    }}void DiagramView::cut(){    copy();    del();}void DiagramView::copy(){    if (activeItem) {        QString str;        if (activeItem->rtti() == DiagramBox::RTTI) {            DiagramBox *box = (DiagramBox *)activeItem;            str = QString("DiagramBox %1 %2 %3 %4 %5")                  .arg(box->width())                  .arg(box->height())                  .arg(box->pen().color().name())                  .arg(box->brush().color().name())                  .arg(box->text());        } else if (activeItem->rtti() == DiagramLine::RTTI) {            DiagramLine *line = (DiagramLine *)activeItem;            QPoint delta = line->endPoint() - line->startPoint();            str = QString("DiagramLine %1 %2 %3")                  .arg(delta.x())                  .arg(delta.y())                  .arg(line->pen().color().name());        }        QApplication::clipboard()->setText(str);    }}void DiagramView::paste(){    QString str = QApplication::clipboard()->text();    QTextIStream in(&str);    QString tag;    in >> tag;    if (tag == "DiagramBox") {        int width;        int height;        QString lineColor;        QString fillColor;        QString text;        in >> width >> height >> lineColor >> fillColor;        text = in.read();        DiagramBox *box = new DiagramBox(canvas());        box->move(20, 20);        box->setSize(width, height);        box->setText(text);        box->setPen(QColor(lineColor));        box->setBrush(QColor(fillColor));        showNewItem(box);    } else if (tag == "DiagramLine") {        int deltaX;        int deltaY;        QString lineColor;        in >> deltaX >> deltaY >> lineColor;        DiagramLine *line = new DiagramLine(canvas());        line->move(20, 20);        line->setPoints(0, 0, deltaX, deltaY);        line->setPen(QColor(lineColor));        showNewItem(line);    }}void DiagramView::del(){    if (activeItem) {        QCanvasItem *item = activeItem;        setActiveItem(0);        delete item;        canvas()->update();    }}void DiagramView::properties(){    if (activeItem) {        PropertiesDialog dialog;        dialog.exec(activeItem);    }}void DiagramView::showNewItem(QCanvasItem *item){    setActiveItem(item);    bringToFront();    item->show();    canvas()->update();}void DiagramView::setActiveItem(QCanvasItem *item){    if (item != activeItem) {        if (activeItem)            activeItem->setActive(false);        activeItem = item;        if (activeItem)            activeItem->setActive(true);        canvas()->update();    }}const int Margin = 2;void drawActiveHandle(QPainter &painter, const QPoint &center){    painter.setPen(Qt::black);    painter.setBrush(Qt::gray);    painter.drawRect(center.x() - Margin, center.y() - Margin,                     2 * Margin + 1, 2 * Margin + 1);}DiagramBox::DiagramBox(QCanvas *canvas)    : QCanvasRectangle(canvas){    setSize(100, 60);    setPen(black);    setBrush(white);    str = "Text";}DiagramBox::~DiagramBox(){    hide();}void DiagramBox::setText(const QString &newText){    str = newText;    update();}void DiagramBox::drawShape(QPainter &painter){    QCanvasRectangle::drawShape(painter);    painter.drawText(rect(), AlignCenter, text());    if (isActive()) {        drawActiveHandle(painter, rect().topLeft());        drawActiveHandle(painter, rect().topRight());        drawActiveHandle(painter, rect().bottomLeft());        drawActiveHandle(painter, rect().bottomRight());    }}QRect DiagramBox::boundingRect() const{    return QRect((int)x() - Margin, (int)y() - Margin,                 width() + 2 * Margin, height() + 2 * Margin);}DiagramLine::DiagramLine(QCanvas *canvas)    : QCanvasLine(canvas){    setPoints(0, 0, 0, 99);}DiagramLine::~DiagramLine(){    hide();}void DiagramLine::drawShape(QPainter &painter){    QCanvasLine::drawShape(painter);    if (isActive()) {        drawActiveHandle(painter, startPoint() + offset());        drawActiveHandle(painter, endPoint() + offset());    }}QPointArray DiagramLine::areaPoints() const{    const int Extra = Margin + 1;    QPointArray points(6);    QPoint pointA = startPoint() + offset();    QPoint pointB = endPoint() + offset();    if (pointA.x() > pointB.x())        swap(pointA, pointB);    points[0] = pointA + QPoint(-Extra, -Extra);    points[1] = pointA + QPoint(-Extra, +Extra);    points[3] = pointB + QPoint(+Extra, +Extra);    points[4] = pointB + QPoint(+Extra, -Extra);    if (pointA.y() > pointB.y()) {        points[2] = pointA + QPoint(+Extra, +Extra);        points[5] = pointB + QPoint(-Extra, -Extra);    } else {        points[2] = pointB + QPoint(-Extra, +Extra);        points[5] = pointA + QPoint(+Extra, -Extra);    }    return points;}