Массив объектов, размерность неизвестна, трудности... Опции

[FladeX]

Нужно сделать массив объектов, причем размерность массива динамическая, то есть неизвестно сколько элементов будет в нем.
Что делал я:
Сначала описал объект:

class Triangle : public QWidget
{
    Q_OBJECT
public:
    int id;
    double x1;
    double y1;
    double x2;
    double y2;
    double x3;
    double y3;
};

Затем, немного погуглив, понял, что лучше всего использовать QList. Задаю массив так:

class cDrawField : public QWidget
{
    Q_OBJECT
public:
    QList<Triangle> triangle;
}

Вроде все правильно, а компилятор ругается на неизвестные переменные:

main.cpp: In constructor ‘cDrawField::cDrawField(QWidget*)’:
main.cpp:71: error: ‘class QList<Triangle>’ has no member named ‘id’
main.cpp:72: error: ‘class QList<Triangle>’ has no member named ‘x1’
main.cpp:73: error: ‘class QList<Triangle>’ has no member named ‘y1’
main.cpp:74: error: ‘class QList<Triangle>’ has no member named ‘x2’
main.cpp:75: error: ‘class QList<Triangle>’ has no member named ‘y2’
main.cpp:76: error: ‘class QList<Triangle>’ has no member named ‘x3’
main.cpp:77: error: ‘class QList<Triangle>’ has no member named ‘y3’

А где их прописывать, я так и не понял.. Подскажите, пожалуйста.

[FladeX]

main.cpp

#include <QApplication>
#include <QMainWindow>
#include <QWidget>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QString>
#include <QPainter>
#include <QPaintEvent>
#include <QPen>
#include <QFont>
#include <QTextEdit>
#include <QComboBox>
#include "math.h"

#define MOVE_VAL 50

class Triangle
{
public:
    int id;
    int level;
    double x1;
    double y1;
    double x2;
    double y2;
    double x3;
    double y3;
};

class cDrawField : public QWidget
{
    Q_OBJECT
public:
    cDrawField(QWidget *parent = 0);
    ~cDrawField() {};
    double tx1, ty1, tx2, ty2, ts;
    double scale_val;            // dlya mshtabirovaniya, koefficient
    int x_val, y_val;
    QPainter painter;
    QList<Triangle> triag_lst;
    bool time_bool;
    int counter;
    int rec_level;
    //QComboBox *boxTriangle;
protected:
    void paintEvent(QPaintEvent *);
    void triangleDraw(double tmpx1, double tmpy1, double tmpx2, double tmpy2, double tmpx3, double tmpy3, int tmplevel);
};

cDrawField::cDrawField(QWidget *parent)
    : QWidget(parent)
{
    scale_val = 1;

    x_val = 0;
    y_val = 0;

    tx1 = 0;
    ty1 = 0;
    tx2 = 0;
    ty2 = 0;
    ts = 0;
    
    time_bool = true;
    
    counter = 0;
    rec_level = 0;

    setMinimumSize(500, 500);
}

class MyWidget : public QWidget
{
    Q_OBJECT
public:
    MyWidget(QWidget *parent = 0);
    //QComboBox *boxTriangle;
public slots:
    void setValue();
    void drawRect();
    void scaleMinus();
    void scalePlus();
    void moveLeft() { drawer->x_val -= MOVE_VAL; drawer->repaint(); };
    void moveRight() { drawer->x_val += MOVE_VAL; drawer->repaint(); };
    void moveUp() { drawer->y_val -= MOVE_VAL; drawer->repaint(); };
    void moveDown() { drawer->y_val += MOVE_VAL; drawer->repaint(); };
    void triagSelect(int index);
private:
    QLineEdit *x1edit;
    QLineEdit *y1edit;
    QLineEdit *x2edit;
    QLineEdit *y2edit;
    QLineEdit *sedit;
    QPushButton *automode;
    QPushButton *resetmode;
    QPushButton *gomode;
    QComboBox *boxTriangle;
    QTextEdit *textTriangle;
    QPushButton *minus;
    QPushButton *plus;
    QPushButton *b_left, *b_right,
        *b_up, *b_down;
    cDrawField *drawer;
};

MyWidget::MyWidget(QWidget *parent)
    : QWidget(parent)
{
    QHBoxLayout *layout = new QHBoxLayout;
    QGridLayout *grid = new QGridLayout;
    QLabel *x1label = new QLabel(tr("x1="));
    QLabel *y1label = new QLabel(tr("y1="));
    QLabel *x2label = new QLabel(tr("x2="));
    QLabel *y2label = new QLabel(tr("y2="));
    QLabel *slabel = new QLabel(tr("S="));
    QLabel *nolabel = new QLabel(trUtf8("№="));
    x1edit = new QLineEdit;
    y1edit = new QLineEdit;
    x2edit = new QLineEdit;
    y2edit = new QLineEdit;
    sedit = new QLineEdit;
    automode = new QPushButton(tr("Auto"));
    resetmode = new QPushButton(tr("Reset"));
    gomode = new QPushButton(tr("Go!"));
    minus = new QPushButton(tr("-"));
    plus = new QPushButton(tr("+"));

    b_left = new QPushButton(tr("left"));
    b_right = new QPushButton(tr("right"));
    b_up = new QPushButton(tr("up"));
    b_down = new QPushButton(tr("down"));

    boxTriangle = new QComboBox(this);
    textTriangle = new QTextEdit(this);
 
    drawer = new cDrawField(this);
    grid->addWidget(x1label, 0, 0);
    grid->addWidget(y1label, 1, 0);
    grid->addWidget(x2label, 2, 0);
    grid->addWidget(y2label, 3, 0);
    grid->addWidget(slabel, 4, 0);
    grid->addWidget(x1edit, 0, 1);
    grid->addWidget(y1edit, 1, 1);
    grid->addWidget(x2edit, 2, 1);
    grid->addWidget(y2edit, 3, 1);
    grid->addWidget(sedit, 4, 1);
    grid->addWidget(automode, 5, 1);
    grid->addWidget(resetmode, 6, 1);
    grid->addWidget(gomode, 7, 1);
    //grid->addWidget(drawer, 0, 2, 8, 3);
    grid->setRowStretch(8,1);
    grid->addWidget(minus, 9, 0);
    grid->addWidget(plus, 9, 1);
    grid->addWidget(b_up, 10, 0);
    grid->addWidget(b_left, 10, 1);
    grid->addWidget(b_down, 11, 0);
    grid->addWidget(b_right, 11, 1);

    grid->addWidget(nolabel, 12, 0);
    grid->addWidget(boxTriangle, 12, 1);
    grid->addWidget(textTriangle, 13, 0, 1, 2);
    //grid->setColumnStretch(2, 1);
    //grid->setRowStretch(1,1);
    layout->addLayout(grid);
    layout->addWidget(drawer, 1);
    //layout->setAlignment(Qt::AlignLeft);
    setLayout(layout);
    connect(resetmode, SIGNAL(clicked()), x1edit, SLOT(clear()));
    connect(resetmode, SIGNAL(clicked()), y1edit, SLOT(clear()));
    connect(resetmode, SIGNAL(clicked()), x2edit, SLOT(clear()));
    connect(resetmode, SIGNAL(clicked()), y2edit, SLOT(clear()));
    connect(resetmode, SIGNAL(clicked()), sedit, SLOT(clear()));
    connect(automode, SIGNAL(clicked()), this, SLOT(setValue()));
    connect(gomode, SIGNAL(clicked()), this, SLOT(drawRect()));
    connect(minus, SIGNAL(clicked()), this, SLOT(scaleMinus()));
    connect(plus, SIGNAL(clicked()), this, SLOT(scalePlus()));
    connect(b_left, SIGNAL(clicked()), this, SLOT(moveLeft()));
    connect(b_right, SIGNAL(clicked()), this, SLOT(moveRight()));
    connect(b_up, SIGNAL(clicked()), this, SLOT(moveUp()));
    connect(b_down, SIGNAL(clicked()), this, SLOT(moveDown()));
    connect(boxTriangle, SIGNAL(activated(int)), this, SLOT(triagSelect(int)));
}

void MyWidget::triagSelect(int index)
{
    if (index)
    {
        //QList<Triangle> &lst = drawer->triag_lst;
        textTriangle->clear();
        textTriangle->append(QString::number(qAbs(index - 12)));
        textTriangle->append(QString::number(qAbs(index - 11)));
        textTriangle->append(QString::number(qAbs(index - 10)));
        textTriangle->append(QString::number(qAbs(index - 6)));
        textTriangle->append(QString::number(qAbs(index - 5)));
        textTriangle->append(QString::number(qAbs(index - 4)));
        textTriangle->append(QString::number(index + 1));
        textTriangle->append(QString::number(index + 2));
        textTriangle->append(QString::number(index + 3));
    }
}

void MyWidget::setValue()
{
    double tx1, ty1, tx2, ty2, ts;
    QString sx1, sy1, sx2, sy2, ss;
    tx1 = rand() % 500;
    ty1 = rand() % 500;
    tx2 = rand() % 500;
    ty2 = rand() % 500;
    ts = rand() % 100;
    sx1 = QString::number(tx1);
    sy1 = QString::number(ty1);
    sx2 = QString::number(tx2);
    sy2 = QString::number(ty2);
    ss = QString::number(ts);
    x1edit->setText(sx1);
    y1edit->setText(sy1);
    x2edit->setText(sx2);
    y2edit->setText(sy2);
    sedit->setText(ss);
};

void MyWidget::drawRect()
{
    QString sx1, sy1, sx2, sy2, ss;
    sx1 = x1edit->text();
    sy1 = y1edit->text();
    sx2 = x2edit->text();
    sy2 = y2edit->text();
    ss = sedit->text();
    drawer->tx1 = sx1.toDouble();
    drawer->ty1 = sy1.toDouble();
    drawer->tx2 = sx2.toDouble();
    drawer->ty2 = sy2.toDouble();
    drawer->ts = ss.toDouble();
    drawer->time_bool = true;
    //drawer->update();

    /*for(int k=0; k<500; ++k)
    {
        boxTriangle->insertItem(k, QString::number(k));
    }*/
    boxTriangle->clear();
    boxTriangle->addItem(QLatin1String("---"), -1);
    QList<Triangle> &lst = drawer->triag_lst;
    foreach (Triangle trg, lst)
    {
        boxTriangle->addItem(QString(tr("Triangle: %1")).arg(trg.id), trg.id);
    }
    drawer->update();
};

void MyWidget::scaleMinus()
{
    drawer->scale_val -= 0.15;
    drawer->repaint();
};

void MyWidget::scalePlus()
{
    drawer->scale_val += 0.15;
    drawer->repaint();
};

void cDrawField::paintEvent(QPaintEvent *e)
{
    double a;
    double b;
    double s;
    int k;
    if(time_bool)
        triag_lst.clear();

    counter = 0;
    painter.begin(this);
    //painter.translate(this->width()/2, this->height()/2);
    //painter.scale(10, 10);
    painter.setPen(QPen(Qt::black, 1, Qt::SolidLine));

    // определяем глубину рекурсии
    k = 0;
    a = qAbs(ty2 - ty1);
    b = qAbs(tx2 - tx1);
    s = (a * b) / 2;
    while (s > ts)
    {
        k++;
        s = ((1 / pow(2, k)) * a * b) / 2;
    }
    rec_level = k;

    int t_tx1, t_ty1, t_tx2, t_ty2;
    t_tx1 = (x_val+tx1)*scale_val+(this->width()/2-(tx1+(tx2-tx1)/2)*scale_val);
    t_ty1 = (y_val+ty1)*scale_val+(this->height()/2-(ty1+(ty2-ty1)/2)*scale_val);
    t_tx2 = (x_val+tx2)*scale_val+(this->width()/2-(tx1+(tx2-tx1)/2)*scale_val);
    t_ty2 = (y_val+ty2)*scale_val+(this->height()/2-(ty1+(ty2-ty1)/2)*scale_val);


    triangleDraw(t_tx1, t_ty1, t_tx2, t_ty2, t_tx1, t_ty2, 0);
    triangleDraw(t_tx1, t_ty1, t_tx2, t_ty2, t_tx2, t_ty1, 0);
    painter.end();
    
    if(time_bool)
        time_bool = false;

    /*for(int k=0; k<triag_lst.size(); ++k)
    {
        *boxTriangle.insertItem(triag_lst[k].id);
    }*/
    e->accept();
}

void cDrawField::triangleDraw(double tmpx1, double tmpy1, double tmpx2, double tmpy2, double tmpx3, double tmpy3, int tmplevel)
{
    double tmpx4, tmpy4, tmpx5, tmpy5, tmpx6, tmpy6;
    double sqt; // площадь
    double a, b, c, p; // стороны и полупериметр
    QString count;
    QString lev;
    painter.setPen(QPen(Qt::black, 1, Qt::SolidLine));
    painter.drawLine(tmpx1, tmpy1, tmpx2, tmpy2);
    painter.drawLine(tmpx2, tmpy2, tmpx3, tmpy3);
    painter.drawLine(tmpx3, tmpy3, tmpx1, tmpy1);
    //counter++;
    tmplevel++;
    if (tmplevel < rec_level)
    //if (tmplevel == (rec_level - 5))
    {
    
        count = QString::number(counter);
        
        if(time_bool)
        {
            Triangle triangle;
            triangle.id = counter;
            triangle.level = tmplevel;
            triangle.x1 = tmpx1;
            triangle.y1 = tmpy1;
            triangle.x2 = tmpx2;
            triangle.y2 = tmpy2;
            triangle.x3 = tmpx3;
            triangle.y3 = tmpy3;
    
            triag_lst.append(triangle);
        }
    
        painter.setFont(QFont("Times", 10, QFont::Normal));
        painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine));
        count = QString::number(counter);
        painter.drawText(tmpx1+10, tmpy1+10, count);
        painter.setPen(QPen(Qt::red, 1, Qt::SolidLine));
        counter++;
        count = QString::number(counter);
        painter.drawText(tmpx1, tmpy1, count);
        counter++;
        count = QString::number(counter);
        painter.drawText(tmpx2, tmpy2, count);
        counter++;
        count = QString::number(counter);
        painter.drawText(tmpx3, tmpy3, count);
    }
    tmpx4 = (tmpx1 + tmpx2) / 2.0;
    tmpy4 = (tmpy1 + tmpy2) / 2.0;
    tmpx5 = (tmpx2 + tmpx3) / 2.0;
    tmpy5 = (tmpy2 + tmpy3) / 2.0;
    tmpx6 = (tmpx1 + tmpx3) / 2.0;
    tmpy6 = (tmpy1 + tmpy3) / 2.0;
    a = sqrt(((tmpx4 - tmpx5) * (tmpx4 - tmpx5)) + ((tmpy4 - tmpy5) * (tmpy4 - tmpy5)));
    b = sqrt(((tmpx5 - tmpx6) * (tmpx5 - tmpx6)) + ((tmpy5 - tmpy6) * (tmpy5 - tmpy6)));
    c = sqrt(((tmpx6 - tmpx4) * (tmpx6 - tmpx4)) + ((tmpy6 - tmpy4) * (tmpy6 - tmpy4)));
    p = (a + b + c) / 2.0;
    sqt = sqrt((p - a) * (p - b) * (p - c))/(scale_val*scale_val);
    if ((sqt > ts) && (ts != 0))
    {
        triangleDraw(tmpx1, tmpy1, tmpx4, tmpy4, tmpx6, tmpy6, tmplevel);
        triangleDraw(tmpx2, tmpy2, tmpx4, tmpy4, tmpx5, tmpy5, tmplevel);
        triangleDraw(tmpx3, tmpy3, tmpx5, tmpy5, tmpx6, tmpy6, tmplevel);
        triangleDraw(tmpx4, tmpy4, tmpx5, tmpy5, tmpx6, tmpy6, tmplevel);
    }
}

#include "main.moc"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyWidget widget;
    widget.show();
    return app.exec();
}