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Simple SFML problem here

Aceix (1118)
Hi all,
I know that this problem is a bit simple but I still havn't fixed it. Now what I'm trying to do is to draw a circle not by hard-coding but based on mouse coordinates using the Circle(); function.

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//aim:
//----------------------header files---------------------------------------------
#include <iostream>
#include <cstdlib>
#include <SFML/Graphics.hpp>
//----------------------namespaces-----------------------------------------------
using namespace std;
//------------globals/functions'n'classes-prototypes-----------------------------


//-------------------------code--------------------------------------------------

int main()
{
    sf::RenderWindow winMainWindow;
    sf::Shape mwCircle1;

    winMainWindow.Create(sf::VideoMode(800,600,32),"Prog 5 - Main Window");
    while(winMainWindow.IsOpened())
    {
        static sf::Event eventMainWindow;
        static const sf::Input& inputMainWindow=winMainWindow.GetInput();
        static bool bIsDrawing=false;
        static int circle1X, circle1Y, circle1Radius, circle1Temp;

        while(winMainWindow.GetEvent(eventMainWindow))
        {
            if(eventMainWindow.Type==sf::Event::Closed)
            {
                winMainWindow.Close();
            }
            if(eventMainWindow.Type==sf::Event::MouseButtonPressed &&
               eventMainWindow.MouseButton.Button==sf::Mouse::Left && !bIsDrawing)
            {
                bIsDrawing=true;
                circle1X=eventMainWindow.MouseButton.X;
                circle1Y=eventMainWindow.MouseButton.Y;
                circle1Temp=circle1X;
                circle1Radius=0;
            }
            if(bIsDrawing)
            {
                circle1X=inputMainWindow.GetMouseX();
                circle1Radius=(circle1X-circle1Temp);
                mwCircle1.Circle(circle1X,circle1Y,circle1Radius,sf::Color(255,0,255));
                winMainWindow.Clear();
                winMainWindow.Draw(mwCircle1);
            }
            if(eventMainWindow.Type==sf::Event::MouseButtonReleased &&
               eventMainWindow.MouseButton.Button==sf::Mouse::Left)
            {
                bIsDrawing=false;
            }
        }

        mwCircle1.Circle(100,100,100,sf::Color(255,0,255));  //this is just to test the function but it still doesn't work?!?
        winMainWindow.Draw(mwCircle1);

        winMainWindow.Display();
    }

    return 0;
}


Aceix.
Last edited on
Aceix (1118)
The thing is everyrhing compiles fine and no runtime errors, but the circle does not show or draw in the window?

Please help,
Aceix.
cire (8284)
sf::Shape::Circle is a static function that returns a sf::Shape.

Try something like the following (I don't have 1.6 installed, so you may need to make some adjustments -- you should upgrade to 2.0)

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///aim:
//----------------------header files---------------------------------------------
#include <iostream>
#include <cstdlib>
#include <SFML/Graphics.hpp>
//----------------------namespaces-----------------------------------------------
using namespace std;
//------------globals/functions'n'classes-prototypes-----------------------------


//-------------------------code--------------------------------------------------

int main()
{
    sf::RenderWindow winMainWindow;
    winMainWindow.Create(sf::VideoMode(800,600,32),"Prog 5 - Main Window");

    while(winMainWindow.IsOpened())
    {
        // no reason for these to be static
        sf::Event eventMainWindow;
        bool bIsDrawing=false;
        int circle1X, circle1Y, circle1Radius;

        while(winMainWindow.GetEvent(eventMainWindow))
        {
            switch( eventMainWindow.Type )
            {
            case sf::Event::Closed:
                winMainWindow.Close();
                break;

            case sf::Event::MouseButtonPressed:
                if ( eventMainWindow.MouseButton.Button == sf::Mouse::Left && !bIsDrawing )
                {
                    bIsDrawing = true ;
                    circle1X = eventMainWindow.MouseButton.X ;
                    circle1Y = eventMainWindow.MouseButton.Y ;
                    circle1Radius = 0 ;
                }
                break ;

            case sf::Event::MouseButtonReleased:
                if ( eventMainWindow.MouseButton.Button == sf::Mouse::Left )
                    bIsDrawing = false ;
                break ;

            case sf::Event::MouseMoved:
                if ( bIsDrawing )
                {
                    int mouseX = eventMainWindow.MouseMove.X ;
                    int mouseY = eventMainWindow.MouseMove.Y ;
                    circle1Radius = sqrt((circle1X-mouseX)*(circle1X-mouseX)+
                                         (circle1Y-mouseY)*(circle1Y-mouseY)) ;
                }
                break ;

            }
        }

        winMainWindow.Clear() ;        
        winMainWindow.Draw(sf::Shape::Circle(circle1X, circle1Y, 
            circle1Radius, sf::Color(255,0,255))) ;
        winMainWindow.Display();
    }

    return 0;
}
Last edited on
Aceix (1118)
Thanks,
Working on it.

Aceix.
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