Console GDI
 

i Wrote some basic code on something i saw here i while ago and was wondering what people could do with it. it uses a console and you can draw on the console or the entire desktop. i was hopping there was thing people could do to add or improve my code. if you get linker errors you have to add the libgdi32.a library

Main.cpp

#define _WIN32_WINNT 0x0500

#include <iostream>

#include <windows.h>

#include "Pen.h"



using namespace std;



int main()

{

        Draw draw(0); ///Sets if the drawing is only in the cmd console or in the entire screen

        draw.SetPen(255,100,0,10); ///sets pen color and size SetPen(RED,GREEN,BLUE,PEN SIZE);

        while(true) // loop

        {

                draw.Pen(); /// draws pen

                Sleep(10);

        }//end

        return 0;

}

Pen.h

#ifndef PEN_H_INCLUDED

#define PEN_H_INCLUDED



#include <iostream>

#include <windows.h>



using namespace std;



class Draw{

        private:

        POINT p;

        HWND console;

        HDC hdc;

        int R;

        int G;

        int B;

        int Size;

        public:

        Draw(int i)

        {

                /// SetUP

                R=255;

                G=0;

                B=0;

                Size=10;

                if(i == 1){/// to draw in cmd window

                console = GetConsoleWindow();

                hdc = GetDC(console);

                SelectObject(hdc, CreatePen(0, Size, RGB(R,G,B)));

                GetCursorPos(&p);

                ScreenToClient(console, &p);

                MoveToEx(hdc, p.x, p.y, NULL);

                }else if(i==0){ /// draw on entire screen

                console = GetConsoleWindow();

                console = NULL;

                hdc = GetDC(0);

                SelectObject(hdc, CreatePen(0, Size, RGB(R,G,B)));

                GetCursorPos(&p);

                ScreenToClient(NULL, &p);

                MoveToEx(hdc, p.x, p.y, 0);

                }

                ///End

        }

        //Functions



        void Pen();

        void Pen(int x, int y);

        void SetPen(int r, int g, int b, int s);

        // END



};

///Set pen color, Set Pen Size

void Draw::SetPen(int r, int g, int b, int s){

        R=r;

        G=g;

        B=b;

        Size=s;

        SelectObject(hdc, CreatePen(0, Size, RGB(R,G,B)));

}



/// Draws Pen using mousepos

void Draw::Pen()

{

        GetCursorPos(&p);

        ScreenToClient(console, &p);

        LineTo(hdc, p.x, p.y);

}



///using an x and y value input

void Draw::Pen(int x, int y){

        GetCursorPos(&p);

        ScreenToClient(console, &p);

        LineTo(hdc, x, y);

}





#endif // PEN_H_INCLUDED

Re: Console GDI
 

This has no sense.
Drawing must be done in WM_PAINT
Console are not for drawing

Re: Console GDI
 

Why not? If it's possible? Try thinking outside the box :)

To be honest, I can't think of any uses right now, but if were to make a console-based hangman game or something in that order, this might come in useful

Re: Console GDI
 

Well if one was to hide the console window and paint on the main window / active window you could use it in conjunction with something like presentations as a pointing aidor something like that.

@marco
Thats like saying you should do all DirectX Drawing inside WM_PAINT :)

Re: Console GDI
 

Well my use for this was for presentations. so i can draw on the screen. only problem is that if it draws over anything that changes or moves the line is deleted on that area

Re: Console GDI
 

Store what has been drawn by the user somehow, then redraw it :)

Re: Console GDI
 

thanks but sorry to bother you how do i store what has been painted

Re: Console GDI
 

Store the points at which you have something drawn on the screen in an array/vector or what ever you feel is best.