U
Ulkiorra1992March 6, 2018, 8:14 a.m.

QGraphicsScene

Добрый день, можно ли разместить одну сену поверх другой, т.е. есть сцена на весь экран например и в правом верхнем углу другая сцена маленькая, и при нажатии на маленькую сцену она меняется местами с большой(которая на весь экран)

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2
Evgenii Legotckoi
  • March 6, 2018, 3:27 p.m.

Добрый день!
Да такое возможно. Нужно просто перекидывать указатели графических сцен между графическими вьюшками. А ту вьюшку, что в виде миникарты нужно просто постоянно позиционировать в абсолютных координатах относительно родительского виджета.


Например, вот так
widget.h
#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QGraphicsScene>
#include <QResizeEvent>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();


private:
    Ui::Widget *ui;
    QGraphicsScene* m_firstScene;
    QGraphicsScene* m_secondScene;
    QGraphicsView* m_miniMapView;

protected:
    virtual void resizeEvent(QResizeEvent *event) override;

private slots:
    void on_pushButton_clicked();
};

#endif // WIDGET_H

widget.cpp
#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    m_firstScene = new QGraphicsScene(this);
    m_firstScene->setBackgroundBrush(Qt::red);
    ui->graphicsView->setScene(m_firstScene);

    m_secondScene = new QGraphicsScene(this);
    m_secondScene->setBackgroundBrush(Qt::blue);
    m_miniMapView = new QGraphicsView(this);
    m_miniMapView->setFixedSize(200, 130);
    m_miniMapView->setScene(m_secondScene);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::resizeEvent(QResizeEvent *event)
{
    m_miniMapView->setGeometry(event->size().width() - 200, 0, 200, 130);
    QWidget::resizeEvent(event);
}

void Widget::on_pushButton_clicked()
{
    if (ui->graphicsView->scene() == m_firstScene)
    {
        ui->graphicsView->setScene(m_secondScene);
        m_miniMapView->setScene(m_firstScene);
    }
    else
    {
        ui->graphicsView->setScene(m_firstScene);
        m_miniMapView->setScene(m_secondScene);
    }
}

    U
    • March 7, 2018, 10:34 a.m.

    о круто, спасибо))

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