how to create QChars dynamically??

timob256

i make scrollArea and up this QChars but this erorr , Why ??

mainwindows.cpp

...  
scrollArea = new QScrollArea(centralwidget);
    scrollArea->setObjectName(QString::fromUtf8("scrollArea"));
    scrollArea->setWidgetResizable(true);
    scrollAreaWidgetContents = new QWidget();
    scrollAreaWidgetContents->setObjectName(QString::fromUtf8("scrollAreaWidgetContents"));
    scrollAreaWidgetContents->setGeometry(QRect(0, 0, 157, 457));

    verticalLayout_2 = new QVBoxLayout(scrollAreaWidgetContents);
    verticalLayout_2->setObjectName(QString::fromUtf8("verticalLayout_2"));


    scrollArea->setWidget(scrollAreaWidgetContents);
    gridLayout->addWidget(scrollArea, 0, 0, 1, 2);
...


// добавляем график
void MainWindow::qpbutton_add_plot_clicked()
{
    DynamicChart *chart = new DynamicChart( this->scrollAreaWidgetContents );  // Создаем объект динамической графика
   
    verticalLayout_2->addWidget(chart);
   
    scrollArea->setWidget(scrollAreaWidgetContents);
}

dynamicchart.h

#ifndef DYNAMICCHART_H
#define DYNAMICCHART_H

//#include <QChart>
//#include <QtCharts/QChartGlobal>

#include <QtCharts>

class DynamicChart: public QChart
{
    Q_OBJECT
public:
    explicit DynamicChart(QChart *parent = 0);

    ~DynamicChart();

    static int ResID;   // Статическая переменная, счетчик номеров графика
    int getID();        // Функция для возврата локального номера графика

public slots:

private:
    int ChartID = 0;   // Локальная переменная, номер графика
};

#endif // DYNAMICCHART_H

dynamicchart.cpp

#include "dynamicchart.h"

DynamicChart::DynamicChart(QChart *parent) :
    QChart(parent)
{
    ResID++;            // Увеличение счетчика на единицу
    ChartID = ResID;   /* Присвоение кнопке номера, по которому будет производиться
                         * дальнейшая работа с рисунка
                         * */

}

DynamicChart::~DynamicChart()
{

}
/* Метод для возврата значения номера рисунка
 * */
int DynamicChart::getID()
{
    return ChartID;
}

/* Инициализация статической переменной класса.
 * Статическая переменная класса должна инициализироваться в обязательном порядке
 * */
int DynamicChart::ResID = 0;

Christian Ehrlicher

@timob256 said in how to create QChars dynamically??:

QChars but this erorr ,

Which error?

SGaist

Hi,

Short in the desk: did you add the charts module to your project ?

timob256

@Christian-Ehrlicher
@SGaist

QChart is a QGraphicsWidget that you can show in a QGraphicsScene.

how QChart include in Layout and layout include scrollArea ?

thank you for your interest in my question

Christian Ehrlicher

@timob256 said in how to create QChars dynamically??:

DynamicChart(QChart *parent = 0);

You want a QChart* as argument for the parent (for unknown reason) but this->scrollAreaWidgetContents is not a QChart* so it will not compile.

JonB

@timob256
In addition to @Christian-Ehrlicher. Are you aware that a QChartView is a QWidget which can be used to display a QChart (just as a QGraphicsView displays a QGraphicsScene). Maybe that is what you are wanting to use here?

timob256

@JonB @Christian-Ehrlicher

I not andestend how include DynamicChart in DynamicWidget and go this in UI ?

I'm trying to do it like here, but not with buttons, but with charts

https://evileg.com/en/post/77/

JonB

@timob256

QChart *chart = new QChart;
QChartView *chartView = new QChartView(chart);
layout->addWidget(chartView);

timob256

@timob256

JonB

@timob256
There is nothing more to say. Code like the stuff you are using. Replace new QPushButton with code for new QChartView plus its own QChart as above.