AConsoleThatsNotAConsole/main.cpp

#define OLC_PGE_APPLICATION
#include "olcPixelGameEngine.h"

// Override base class with your custom functionality
class Example : public olc::PixelGameEngine
{
public:
    Example()
    {
        // Name your application
        sAppName = "Console Example";
    }
    
public:

    std::vector<std::string>console;
    const float BLINK_TIME=1.f;
    float cursorTime=0.0f;
    bool cursorOn=false;

    olc::Pixel color = olc::DARK_BLUE;

    bool OnUserCreate() override
    {
        // Called once at the start, so create things here
        return true;
    }
    
    void OnTextEntryComplete(const std::string& sText) override
    {
        console.clear();
        console.push_back("You typed:");
        console.push_back("   "+sText);
        console.push_back("===================");
        console.push_back("This is the part where I tell you that something might happen. Or it might not...");
        console.push_back("If you press F1 something interesting might happen.");
    }

    std::string WrapText(std::string str,int width,bool proportional=false,olc::vf2d scale={1,1}) {
        std::string newStr;
        while (true) {
            std::string word;
            if (str.find(" ")==std::string::npos) {
                word=str;
            } else {
                word = str.substr(0,str.find(" "));
            }
            olc::vi2d newSize = (proportional?GetTextSizeProp(newStr+(newStr.size()>0?" ":"")+word):GetTextSize(newStr+(newStr.size()>0?" ":"")+word))*scale;
            if (newSize.x>width) {
                newStr+="\n"+word;
            } else {
                newStr+=(newStr.size()>0?" ":"")+word;
            }
            if (str.find(" ")==std::string::npos) {
                break;
            } else {
                str.erase(0,str.find(" ")+1);
            }
        }
        return newStr;
    }

    bool OnUserUpdate(float fElapsedTime) override
    {
        if (!IsTextEntryEnabled()){
            TextEntryEnable(true,"");
        }

        cursorTime+=fElapsedTime;
        if (cursorTime > BLINK_TIME){
            cursorTime-=BLINK_TIME;
            cursorOn=!cursorOn;
        }

        if (GetKey(olc::F1).bPressed){
            console.clear();
            console.push_back("Nice!");
            color=olc::DARK_GREEN;
        }
        
        Clear(color);
        DrawRect(0,0,ScreenWidth()-1, ScreenHeight()-1, olc::YELLOW);

        std::string mouseText="Cursor Position: "+GetMousePos().str();
        FillRectDecal({1,1},{(float)ScreenWidth()-2,20},olc::BLACK);

        int drawPosY=ScreenHeight()-32;

        DrawStringDecal({8,4},mouseText,olc::WHITE);

        for (int i=console.size()-1;i>=0;i--){
            if (drawPosY>=24){
                std::string wrappedVersion=WrapText(console[i],ScreenWidth()-16);
                DrawStringDecal({8,(float)drawPosY - GetTextSize(wrappedVersion).y},wrappedVersion);
                drawPosY-=GetTextSize(wrappedVersion).y+12;
            }
            drawPosY-=12;
        }

        std::string displayText = "> " + TextEntryGetString() + (cursorOn?"|":" ");

        DrawStringDecal({4,(float)ScreenHeight()-12},displayText);

        return true;
    }
};

int main()
{
    Example demo;
    if (demo.Construct(256, 240, 2, 2))
        demo.Start();
    return 0;
}