Window larger than screen: how to see all parts?

Processing
1

Sometimes I use processing with larger photos (e.g. size(15000, 4000);).

It would be great if I could scroll around (or even zoom in and out) to see if all the parts of the photo are ready before saving the image, but right now the best I can do is slide the window from left to right and only see the uppermost part. Is there anyway around this?

2

did you play with the image function copy and resize?
small test:

/**
 * Load and Display 
 * 
 * Images can be loaded and displayed to the screen at their actual size
 * or any other size. 
 */
 
// test move zoom 

//______________________________________ VARIABLES
PImage img0,img; //_____________________ Declare variables of type PImage
String infile = "data/moonwalk.jpg"; //_ source file
float w,h,zoom=0.50;
float px,py; //_________________________ center position

void setup() { //_______________________ SETUP
  size(640, 360);
  img0 = loadImage(infile); //__________ Load the image into the program  
  w = img0.width; //____________________ get its original size
  h = img0.height;
  px = w/2; //__________________________ default center position
  py = h/2;
  println("use: mouse for move and mouswheel for zoom");
}

void select() { //______________________ IMAGE MOD FUNCTION
  mousemove(); //_______________________ look for mouse position
  img = img0.copy(); //_________________ make a copy
  img.copy(int(px-w/2),int(py-h/2),int(w),int(h),0,0, int(w),int(h)); //_ select what we need
  img.resize(int(w*zoom),int(h*zoom)); //_ and zoom it
}

void draw() { //________________________ DRAW
  background(200,200,0); 
  select(); //__________________________ get it
  image(img, 0, 0); //__________________ show it
}

void mousemove() { //___________________ mouse click CENTER
  px = mouseX*zoom; //__________________ not optimal math
  py = mouseY*zoom;
  println("center at "+px+" , "+py);
}

void mouseWheel(MouseEvent event) { //__ mouse scroll ZOOM
  float e = event.getCount();
  //if ( keyPressed && key == 'z' )  //_ optional MWPP  
  zoom += e*0.03; //____________________ play with zoom step size here
}
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3

What you need is call panning. Previous posts:

Kf

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