ofxJFCanvas/ofxJFCanvas.h at master · joaodafonseca/ofxJFCanvas · GitHub

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//
//  ofxJFCanvas.h
//  ofxJFCanvas
//
//  Created by João Fonseca on 31/07/15.
//
//

#pragma once

class ofxJFCanvas {

public:

    ofVec2f canvasSize;
    ofVec2f windowSize;
    ofVec2f anchorPoint;
    ofVec2f navWindowSize;

    ofFbo * canvas;
    ofFbo * canvas2;

    float scale;
    float minScale;
    float maxScale;

    bool pdfRendering;


    ofxJFCanvas(){}

    ofxJFCanvas(int _w, int _h, ofFbo * _canvas, ofFbo * _canvas2){

        canvas = _canvas;
        canvas2 = _canvas2;
        windowSize.set(_w, _h);

        scale = windowSize.x / canvas->getWidth();
        minScale = scale;
        maxScale = 10;
        anchorPoint.set(0,0);
        canvasSize.set(canvas->getWidth()*scale,canvas->getHeight()*scale);

        pdfRendering=false;
    }

    void update(){

    }

    void draw(){

        float anchorPosX=ofMap(anchorPoint.x,0,navWindowSize.x,0,canvasSize.x);
        float anchorPosY=ofMap(anchorPoint.y,0,navWindowSize.y,0,canvasSize.y);

        ofPushMatrix();
        ofPushStyle();

        ofTranslate(ofGetWidth()/2, ofGetHeight()/2);
        ofPushStyle();
        ofSetColor(220);
        ofDrawRectangle(0-(canvasSize.x/2)-anchorPosX,0-(canvasSize.y/2)-anchorPosY,canvasSize.x,canvasSize.y);
        ofPopStyle();

        ofSetColor(255);
        canvas->draw(0-(canvasSize.x/2)-anchorPosX,0-(canvasSize.y/2)-anchorPosY,canvasSize.x,canvasSize.y);
        ofSetColor(255);
        canvas2->draw(0-(canvasSize.x/2)-anchorPosX,0-(canvasSize.y/2)-anchorPosY,canvasSize.x,canvasSize.y);

        ofPopStyle();
        ofPopMatrix();


        //exportToPdf();

        navigationWindow();

//        ofPixels temp;
//        canvas->readToPixels(temp);
//        ofSaveImage(temp, "exports/png/frame_"+ofToString(ofGetFrameNum())+".png", OF_IMAGE_QUALITY_BEST);
    }

    void navigationWindow(){

        float navWindowScale=0.1;


        navWindowSize.set(canvas->getWidth()*navWindowScale,canvas->getHeight()*navWindowScale);
        ofVec2f navWindowPosition(windowSize.x-20-navWindowSize.x,20);
        navWindowPosition+=navWindowSize/2;

        ofPushMatrix();
        ofPushStyle();

        ofTranslate(navWindowPosition.x, navWindowPosition.y);

        ofSetColor(255);
        canvas->draw(-navWindowSize.x/2,-navWindowSize.y/2,navWindowSize.x,navWindowSize.y);
        canvas2->draw(-navWindowSize.x/2,-navWindowSize.y/2,navWindowSize.x,navWindowSize.y);

        ofNoFill();
        ofSetColor(255);
        ofDrawRectangle(-navWindowSize.x/2,-navWindowSize.y/2,navWindowSize.x,navWindowSize.y);


        if(scale!=minScale){
            ofFill();
            ofSetColor(255);
            int lineSize=20;
            ofDrawLine(anchorPoint.x-lineSize, anchorPoint.y, anchorPoint.x+lineSize, anchorPoint.y);
            ofDrawLine(anchorPoint.x, anchorPoint.y-lineSize, anchorPoint.x, anchorPoint.y+lineSize);


            if(ofGetMousePressed() && ((ofGetMouseX()>navWindowPosition.x-navWindowSize.x/2) && (ofGetMouseX()<navWindowPosition.x -navWindowSize.x/2 + navWindowSize.x) && (ofGetMouseY()>navWindowPosition.y -navWindowSize.y/2) && (ofGetMouseY()<navWindowPosition.y -navWindowSize.y/2 + navWindowSize.y))){

                anchorPoint.set(ofGetMouseX()-(navWindowPosition.x-navWindowSize.x/2)-navWindowSize.x/2, ofGetMouseY()-(navWindowPosition.y-navWindowSize.y/2)-navWindowSize.y/2);
            }

        }else {

            anchorPoint.set(0,0);
        }

        ofPopStyle();
        ofPopMatrix();


    }


    void zoom(){

        scale = ofClamp(scale, minScale, maxScale);
        canvasSize.set(canvas->getWidth()*scale,canvas->getHeight()*scale);
    }


    void keyPressed(int _key){

        if (_key == '+') {
            scale += 0.1;
            zoom();

        }else if(_key == '-'){
            scale -= 0.1;
            zoom();

        }else if(_key == '1'){
            scale = minScale;
            zoom();

        }else if(_key == '2'){
            scale = 1;
            zoom();

        }else if(_key == '3'){
            scale = 1*5;
            zoom();

        }else if(_key == 'e'){

            //            pdfRendering=!pdfRendering;
            //            exportToPdf();
        }
    }


    void exportToPdf(){

        //ofPushMatrix();

        if( pdfRendering ){
            //ofSetFrameRate(12);  // so it doesn't generate tons of pages
            ofRectangle viewport(0, 0, canvas->getWidth(), canvas->getHeight());
            ofViewport(viewport);
            ofBeginSaveScreenAsPDF("exports/frame_"+ofToString(ofGetFrameNum())+".pdf", false);
        }else{
            // ofSetFrameRate(60);
            ofEndSaveScreenAsPDF();

        }

    }


};