How to call a slot of button class when a window is closed ?

pratik041

I have a window class and a child button class. I am making custom button.I am using mouse release and press event in button class.
I am changing button image at each mouse_hover and press or release event.

I want when i press a button a new window should open and as long as the window is opened the button should be in pressed state
and when i close that window, button should change to released state. I can't use checkable state property because my button is custom type. So how i will know the window is closed or not and how to change the button state at the same time.
My code is pasted below please tell me the change i have to do in that

main.cpp
@#include <QtGui/QApplication>
#include "button.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QMainWindow window;
QMainWindow window1;

float button_width  = 47;
float button_height = 47;
int   button_states = 1;

//window.setStyleSheet("background-image: url(:/Sunset.jpg);");

QPixmap pixmap(":/endcall.png");    
Button *button1  = new Button(button_width, button_height, button_states, pixmap, &window);
button1->setGeometry(60, 70, 80, 90);

QObject::connect(button1,SIGNAL(clicked()),window1,SLOT(open()));

window.show();

return a.exec&#40;&#41;;

}

button.cpp

#include "mainwindow.h"

Button::Button(QWidget *parent):
QPushButton(parent),
m_hovered(false),
m_pressed(false)
{}

Button::Button (float button_width1,
float button_height1,
int button_states,
QPixmap &pixmap1,
QWidget *parent):
QPushButton( parent),
m_hovered(false),
m_pressed(false)
{
pixmap = pixmap1;
button_width = button_width1;
button_height = button_height1;
num_of_states = button_states;
num_of_images = pixmap.width()/button_width;
press_count = 0;
count = 0;

target = QRectF(0.0, 0.0, button_width, button_height);
source = QRectF(0.0, 0.0, button_width, button_height);

}

Button::~Button ()
{}

void Button::enterEvent (QEvent *e)
{
m_hovered = true;
this->repaint();
QPushButton::enterEvent(e);
}

void Button::leaveEvent (QEvent *e)
{
m_hovered = false;
this->repaint();
QPushButton::leaveEvent(e);
}

void Button::mousePressEvent (QMouseEvent *e)
{
....................

...........................
this->repaint();
QPushButton::mousePressEvent(e);
}

void Button::mouseReleaseEvent (QMouseEvent *e)
{.................

.........................

        this->repaint();
    
QPushButton::mouseReleaseEvent(e);

}

void Button::paintEvent (QPaintEvent *e)
{
Q_UNUSED(e);

.............

.......................
this->setMask(region);
painter.drawPixmap(target, pixmap, source);

switch (num_of_states) {

case 1:

    if (this->isEnabled()) {

        if(num_of_images == 4) {

            painter.drawPixmap(target, pixmap, source);

        } else {

            if(!m_pressed) {

                source = QRectF(0.0, 0.0, button_width, button_height);
            }

            painter.drawPixmap(target, pixmap, source);

            if (m_hovered) {
                source = QRectF(button_width, 0.0 ,button_width, button_height);
                painter.drawPixmap(target, pixmap, source);

            }
        }

    } else {

        painter.drawPixmap(target, pixmap, source);
    }

    break;


case 2:

    if (this->isEnabled()) {

        if (press_count % 2 != 0 || press_count == 0) {
            if(!m_pressed) {
                source = QRectF(0, 0, button_width, button_height);
           }

        } else {
            if(m_pressed) {
              source = QRectF(0, 0 , button_width, button_height);
            }
        }

        painter.drawPixmap(target,pixmap,source);

        if (press_count % 2 != 0 || press_count == 0) {
            if (m_hovered && m_pressed == false) {
                source = QRectF(button_width , 0, button_width, button_height);

            }
        } else {
            if (m_hovered && m_pressed == true){
                source = QRectF(button_width , 0, button_width, button_height);
            }
        }
        painter.drawPixmap(target, pixmap, source);

        break;
    }
}

}

button.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtGui>

class Button : public QPushButton
{

Q_OBJECT

public:

Button(QWidget *parent = 0);

Button(float button_width1, float button_height1, int button_states, QPixmap &, QWidget *parent = 0);

void check_condition(int,QPainter &);

~Button();

void enterEvent(QEvent *);

void leaveEvent(QEvent *);

void mousePressEvent(QMouseEvent *e);

void mouseReleaseEvent(QMouseEvent *e);

void paintEvent(QPaintEvent *);

private:

bool m_hovered;
bool m_pressed;

int num_of_states;
int press_count;
int count;
int num_of_images;

float button_width;
float button_height;

QRectF target;
QRectF source;

QPixmap pixmap;

};

#endif // MAINWINDOW_H

@

goetz

Is the second window a modal dialog? If yes, the exec call returns only after the second window has been closed. The first window has blocked user input though.

pratik041

Sorry, but i didn't get the answer. Please specify it in details

goetz

[[Doc:QDialog]] has the explanations about modal and modeless dialogs. A modal dialog spins its own [[Doc:QEventLoop]], you should know about both as a Qt developer. Maybe using a modal dialog solves your problem.

pratik041

ok i will try that