Transferring data from one form to another in Qt? - c++

Question

there was such problem. I have a main and auxiliary form. With the second form, I take two values: the index and the color. I'm transferring to the main form. I get the values ​​in the "setParametr" method. But I can not get them in the "paintEvent" method. QDebug show that the method "setParametr" got the values. When I check the values ​​in "on_pushButton_clicked()" values is 0. What could be the problem. Just started to study Qt
dialog.h
class Dialog : public QDialog
{
Q_OBJECT
public:
explicit Dialog(QWidget *parent = 0);
~Dialog();
void setcolor(int);
int getcolor();
void setindex(int);
int getindex();
private slots:
void ColorIndex();
void on_pushButton_clicked();
private:
Ui::Dialog *ui;
int squareColor;
int Index;
};
dialog.cpp
#include "ui_dialog.h"
#include "dialog.h"
#include "mainwindow.h"
#include "QDebug"
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
//connect(ui->pushButton,SIGNAL(clicked()),this,SLOT(ColorIndex()));
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::setcolor(int color)
{
squareColor = color;
}
int Dialog::getcolor()
{
return squareColor;
}
void Dialog::setindex(int index)
{
Index = index;
}
int Dialog::getindex()
{
return Index;
}
void Dialog::on_pushButton_clicked()
{
MainWindow *main = new MainWindow();
if(ui->radioButton->isChecked()){
setcolor(1);
}
if(ui->radioButton_2->isChecked()){
setcolor(2);
}
if(ui->radioButton_3->isChecked()){
setcolor(3);
}
if(ui->comboBox->currentIndex()==0)
{
setindex(1);
}
if(ui->comboBox->currentIndex()==1)
{
setindex(2);
}
if(ui->comboBox->currentIndex()==2)
{
setindex(3);
}
if(ui->comboBox->currentIndex()==3)
{
setindex(4);
}
qDebug() << QString::number(getcolor());
qDebug() << QString::number(getindex());
main->SetParametr(getindex(),getcolor());
}
mainwindow.h
#include <QWidget>
#include <QPainter>
#include <QPaintEvent>
#include <QPainterPath>
#include <QColor>
#include <QColorDialog>
#include <QPushButton>
#include <QMainWindow>
#include "dialog.h"
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void setColor(int);
int getColor();
void setIndex(int);
int getIndex();
private:
Dialog *dial = new Dialog();
int fIndex;
int fColor;
private slots:
void on_actionMy_Dialog_triggered();
void paintEvent(QPaintEvent *event);
void on_pushButton_clicked();
signals:
void SetParametr(int index, int color);
private:
Ui::MainWindow *ui;
void onInit();
};
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QDebug"
#include "dialog.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
fColor = 0;
fIndex =0;
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::SetParametr(int index, int color)
{
fIndex = index;
fColor = color;
qDebug() << QString::number(fColor) + "s";
qDebug() << QString::number(fIndex);
}
/*void MainWindow::setColor(int _color)
{
fColor = _color;
}
int MainWindow::getColor()
{
return fColor;
}
void MainWindow::setIndex(int _index)
{
fIndex = _index;
}
int MainWindow::getIndex()
{
return fIndex;
}
*/
void MainWindow::paintEvent(QPaintEvent *event)
{
QColor red1;
if(fColor==1){
red1 = Qt::red;
}
if(fColor == 2){
red1 = Qt::blue;
}
if(fColor == 3){
red1 = Qt::green;
}
int index1;
if(fIndex == 0)
{
index1 = 0;
}
if(fIndex == 1)
{
index1 = 1;
}
if(fIndex == 2)
{
index1 = 2;
}
if(fIndex == 3)
{
index1 = 3;
}
Q_UNUSED(event);
QPainter painter(this);
if(index1 == 0)
{
painter.setBrush(QBrush(red1, Qt::SolidPattern));
painter.drawEllipse(100, 50, 150, 150);
}
if(index1 == 1)
{
painter.setBrush(QBrush(red1, Qt::SolidPattern));
painter.drawRect(50, 50, 250, 150);
}
if(index1 == 2)
{
painter.setBrush(QBrush(red1, Qt::SolidPattern));
QPolygon polygon;
polygon<<QPoint(175,50)<<QPoint(50,200)<<QPoint(300,200);
painter.drawPolygon(polygon);
}
if(index1 == 3)
{
painter.setBrush(QBrush(red1, Qt::SolidPattern));
painter.drawRect(100, 50, 150, 150);
}
}
void MainWindow::on_actionMy_Dialog_triggered()
{
dial->show();
}
void MainWindow::on_pushButton_clicked()
{
qDebug() << QString::number(fColor);
qDebug() << QString::number(fIndex);
}