qtforum.de

Code: Alles auswählen

//MyLegoViewer.h
#ifndef MYLEGOVIEWER_H
#define MYLEGOVIEWER_H

#include<QWidget>
#include<QLabel>
#include<QPixmap>
#include<QImage>
#include<QVBoxLayout>
#include<QGridLayout>
#include<QString>
#include<QPushButton>

class vector;

class MyLegoViewer: public QWidget
{
   Q_OBJECT

   public:
      MyLegoViewer(QWidget* parent=0);
      ~MyLegoViewer();
       
   private:
      QLabel imageholder;
      QImage image;

      std::vector<QString> filenames;
      int counter;

      QPushButton back;
      QPushButton forward;

      QGridLayout gridLayout;
      QVBoxLayout boxLayout;

   public slots:
      void sBack();
      void sForward();
     
};
#endif

Code: Alles auswählen

//MyLegoViewer.cpp
#include"MyLegoViewer.h"
#include<vector>

MyLegoViewer::MyLegoViewer(QWidget* parent)
:QWidget(parent)
{
   back.setText("<<");
   forward.setText(">>");
   filenames.push_back("lego.bmp");
   filenames.push_back("lego2.bmp");
   
   counter=0;

   image.load(filenames[0]);
   imageholder.setPixmap(QPixmap::fromImage(image));

   connect(&forward,SIGNAL(clicked()),this,SLOT(sForward()));
   connect(&back,SIGNAL(clicked()),this,SLOT(sBack()));

   gridLayout.addWidget(&back,0,0);
   gridLayout.addWidget(&forward,0,1);

   boxLayout.addWidget(&imageholder);
   boxLayout.addLayout(&gridLayout);

   setLayout(&boxLayout);
}

MyLegoViewer::~MyLegoViewer()
{}

void MyLegoViewer::sForward()
{
   if(counter+1==filenames.size()) return;
   else
   {
      image.load(filenames[++counter]);
      imageholder.setPixmap(QPixmap::fromImage(image));
   }
}

void MyLegoViewer::sBack()
{
   if((counter-1)==-1) return;
   else
   {
      image.load(filenames[--counter]);
      imageholder.setPixmap(QPixmap::fromImage(image));
   }
}

Code: Alles auswählen

//main.cpp
#include <QApplication>
#include"MyLegoViewer.h"

int main(int argc, char *argv[])
{
   QApplication app(argc, argv);
        
   MyLegoViewer window;
   window.show();
        
   return app.exec();
 }