Please Help with QButton

[agup006]

I just want to create a button that will allow me to paint on an image i already have made in my main class. I want this button to draw a square on my image, but whenever i try and use it i cant have it redrawn on my label.

#include <QtCore>
#include <QtGui>
#include <QDebug>
#include <CoordinateValue.h>
#include <mainwindow.h>
#include <Level.h>
//#include <Coordinate.h>
 
//#include<Graphics.h>
 
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
 
QLabel window;
QPixmap lvlone;
QPixmap ftowpic;
QIcon ftowicon;
 
lvlone.load(QString::fromUtf8("C:/Users/Agup/Desktop/Map1.bmp"));
ftowpic.load(QString::fromUtf8("C:/Users/Agup/Desktop/FreshmenTower.bmp"));
 
CoordinateValue cv;
//cv.setValid(1);
 
//load pixmap into icon for button
ftowicon.addPixmap(ftowpic);
QSize ftowsize(25,25);
 
 
// next code is to check if worked or not
//qDebug() << goodLoad << lvlone.isNull() << lvlone.size() << lvlone.depth();
 
//make mappaint use the map as background
 
 
QPainter mappaint(&lvlone);
 
 
QPen Black((QColor::QColor(0,0,0)),1);
mappaint.setPen(Black);
 
for(int i = 0;i<501;i += 50)
{
    mappaint.drawLine(0,i,500,i);
}
for(int j = 0;j<501;j += 50)
{
    mappaint.drawLine(j,0,j,500);
}
//use this code to draw towers depenrding on valid spots.
//mappaint.drawPixmap(200,150,50,50, ftowpic);
 
 
 
//QPushButton Start("Start", &window);
//Start.setGeometry(200,200,50,50);
//QObject::connect(&Start,SIGNAL(clicked()),g,SLOT(PaintIT()));
 
 
//freshmen tower button
QPushButton FTower(ftowicon,"Freshmen\n Tower", &window);
FTower.setFont(QFont("Purisa",8));
FTower.setGeometry(500,0,100,100);
FTower.setIconSize(ftowsize);
 
 
 
cv.getPainter(mappaint);
 
QObject::connect(&FTower,SIGNAL(clicked()),&cv, SLOT(paintValid()));
QPushButton quit("Quit", &window);
quit.setFont(QFont("Purisa", 12));
quit.setGeometry(575,400,100,50);
QObject::connect(&quit, SIGNAL(clicked()), &app, SLOT(quit()));
 
window.resize(750,500);
window.setPixmap(lvlone);
window.show();
 
cv.paintValid();
return app.exec();
}

#include <QtCore>
#include <QtGui>
#include <QDebug>
#include <CoordinateValue.h>
#include <mainwindow.h>
#include <Level.h>
//#include <Coordinate.h>

//#include<Graphics.h>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QLabel window;
QPixmap lvlone;
QPixmap ftowpic;
QIcon ftowicon;

lvlone.load(QString::fromUtf8("C:/Users/Agup/Desktop/Map1.bmp"));
ftowpic.load(QString::fromUtf8("C:/Users/Agup/Desktop/FreshmenTower.bmp"));

CoordinateValue cv;
//cv.setValid(1);

//load pixmap into icon for button
ftowicon.addPixmap(ftowpic);
QSize ftowsize(25,25);


// next code is to check if worked or not
//qDebug() << goodLoad << lvlone.isNull() << lvlone.size() << lvlone.depth();

//make mappaint use the map as background


QPainter mappaint(&lvlone);


QPen Black((QColor::QColor(0,0,0)),1);
mappaint.setPen(Black);

for(int i = 0;i<501;i += 50)
{
    mappaint.drawLine(0,i,500,i);
}
for(int j = 0;j<501;j += 50)
{
    mappaint.drawLine(j,0,j,500);
}
//use this code to draw towers depenrding on valid spots.
//mappaint.drawPixmap(200,150,50,50, ftowpic);



//QPushButton Start("Start", &window);
//Start.setGeometry(200,200,50,50);
//QObject::connect(&Start,SIGNAL(clicked()),g,SLOT(PaintIT()));


//freshmen tower button
QPushButton FTower(ftowicon,"Freshmen\n Tower", &window);
FTower.setFont(QFont("Purisa",8));
FTower.setGeometry(500,0,100,100);
FTower.setIconSize(ftowsize);



cv.getPainter(mappaint);

QObject::connect(&FTower,SIGNAL(clicked()),&cv, SLOT(paintValid()));
QPushButton quit("Quit", &window);
quit.setFont(QFont("Purisa", 12));
quit.setGeometry(575,400,100,50);
QObject::connect(&quit, SIGNAL(clicked()), &app, SLOT(quit()));

window.resize(750,500);
window.setPixmap(lvlone);
window.show();

cv.paintValid();
return app.exec();
}

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and it uses a slot from here

#ifndef COORDINATEVALUE_H
#define COORDINATEVALUE_H
 
 
#include <QtCore>
#include <QtGui>
#include <QDebug>
#include <Coordinate.h>
class CoordinateValue: public QObject
{
    Q_OBJECT
 
        Coordinate coor[100];
 
    public:
        QPixmap newImage;
        QLabel newWindow;
        QPainter plzwrk;
 
    //makes 100 coordinates
 
        int getSpot(int x,int y)
        {
 
            //returns numerical spot corresponding
            //with array coor for which spot coordinate is in
            return (x%50)+((y/50)*10);
        }
        void setValues()
        {
            //sets each value of grid in image
            //to a value of 1-100 based on location
            int c = 0;
            for(int i = 0; i<500; i+= 50){
                for(int j = 0;j<500; j+=50)
                {
                    coor[c].setX(j);
                    coor[c].setY(i);
                    c++;
                }
            }
        }
        //get X Drawing Coordinates
        int getXDC(int spot)
        {
            return coor[spot].getX();
        }
        //get Y Drawing Coordinates
        int getYDC(int spot)
        {
            return coor[spot].getY();
        }
        void setValid(int levelnum)
       {
//            switch (levelnum)
//                case 1:
 
//                break;
//                case 2:
 
//                break;
 
        }
        void getPainter(QPainter &painter)
        {
            plzwrk = painter;
        }
public slots:
        void paintValid()
        {
                    QPen linepen;
                    linepen.setWidth(2);
                    linepen.setColor(Qt::green);
                    plzwrk.setPen(linepen);
 
                    QPolygon poly;
                    poly<< QPoint(0,0);
                    poly<< QPoint(0,50);
                    poly<< QPoint(50,50);
                    poly<< QPoint(50,0);
 
                    QBrush transbrush;
                    transbrush.setColor(Qt::green);
                    transbrush.setStyle(Qt::Dense5Pattern);
 
                    QPainterPath path;
                    path.addPolygon(poly);
 
                    plzwrk.drawPolygon(poly);
                    plzwrk.fillPath(path,transbrush);
 
        }
        void doNothing()
        {
            QString new1 = "hi";
            qDebug()<<new1;
        }
 
};
#endif // COORDINATEVALUE_H

#ifndef COORDINATEVALUE_H
#define COORDINATEVALUE_H


#include <QtCore>
#include <QtGui>
#include <QDebug>
#include <Coordinate.h>
class CoordinateValue: public QObject
{
    Q_OBJECT

        Coordinate coor[100];

    public:
        QPixmap newImage;
        QLabel newWindow;
        QPainter plzwrk;

    //makes 100 coordinates

        int getSpot(int x,int y)
        {

            //returns numerical spot corresponding
            //with array coor for which spot coordinate is in
            return (x%50)+((y/50)*10);
        }
        void setValues()
        {
            //sets each value of grid in image
            //to a value of 1-100 based on location
            int c = 0;
            for(int i = 0; i<500; i+= 50){
                for(int j = 0;j<500; j+=50)
                {
                    coor[c].setX(j);
                    coor[c].setY(i);
                    c++;
                }
            }
        }
        //get X Drawing Coordinates
        int getXDC(int spot)
        {
            return coor[spot].getX();
        }
        //get Y Drawing Coordinates
        int getYDC(int spot)
        {
            return coor[spot].getY();
        }
        void setValid(int levelnum)
       {
//            switch (levelnum)
//                case 1:

//                break;
//                case 2:

//                break;

        }
        void getPainter(QPainter &painter)
        {
            plzwrk = painter;
        }
public slots:
        void paintValid()
        {
                    QPen linepen;
                    linepen.setWidth(2);
                    linepen.setColor(Qt::green);
                    plzwrk.setPen(linepen);

                    QPolygon poly;
                    poly<< QPoint(0,0);
                    poly<< QPoint(0,50);
                    poly<< QPoint(50,50);
                    poly<< QPoint(50,0);

                    QBrush transbrush;
                    transbrush.setColor(Qt::green);
                    transbrush.setStyle(Qt::Dense5Pattern);

                    QPainterPath path;
                    path.addPolygon(poly);

                    plzwrk.drawPolygon(poly);
                    plzwrk.fillPath(path,transbrush);

        }
        void doNothing()
        {
            QString new1 = "hi";
            qDebug()<<new1;
        }

};
#endif // COORDINATEVALUE_H

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i get that its not neat but any help would greatly be appreciated thanks

[grin]

I just want to create a button that will allow me to paint on an image

For this task you do not necessarily create you own button's class. You can you QPushButton or QToolButton.
See http://doc.qt.nokia.com/stable/qabst...html#icon-prop.

P.S. - I don't saw your code - sorry.