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/*
* The MIT License (MIT)
*
* Copyright (c) 2015 Camil Staps <info@camilstaps.nl>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.camilstaps.mandelbrot;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
/**
* A frame in which zooming is possible
* @author Camil Staps, s4498062
*/
public class ZoomFrame extends JFrame implements MouseListener, MouseMotionListener {
private MandelbrotView mandelbrotView;
private MandelbrotTextFields mandelbrotTextFields;
private Graphics graphics;
private int start_x, start_y, old_x, old_y;
private boolean dragging = false;
public ZoomFrame(String s) {
super(s);
addMouseListener(this);
addMouseMotionListener(this);
}
public void setMandelbrotView(MandelbrotView mv) {
mandelbrotView = mv;
}
public void setMandelbrotTextFields(MandelbrotTextFields mtf) {
mandelbrotTextFields = mtf;
}
@Override
public void mouseClicked(MouseEvent me) {}
/**
* Save the coordinates
* @param me
*/
@Override
public void mousePressed(MouseEvent me) {
old_x = start_x = me.getX();
old_y = start_y = me.getY();
}
/**
* On shift-click, zoom out.
* On click, zoom in.
* On drag, zoom the box.
* @param me
*/
@Override
public void mouseReleased(MouseEvent me) {
if (me.getX() == start_x && me.getY() == start_y) {
if ((me.getModifiers() & InputEvent.SHIFT_MASK) != 0) {
zoomOut(me);
} else {
zoomIn(me);
}
} else {
zoomBox(me);
}
mandelbrotView.redraw();
dragging = false;
}
/**
* Zoom in with factor 2
* @param me
*/
private void zoomIn(MouseEvent me) {
if (mandelbrotView == null || mandelbrotTextFields == null)
return;
mandelbrotTextFields.setCenterX(mandelbrotView.getX(me.getX()));
mandelbrotTextFields.setCenterY(mandelbrotView.getY(me.getY()));
mandelbrotTextFields.setScale(mandelbrotTextFields.getScale() * 2);
}
/**
* Zoom out with factor 2
* @param me
*/
private void zoomOut(MouseEvent me) {
if (mandelbrotView == null || mandelbrotTextFields == null)
return;
mandelbrotTextFields.setCenterX(mandelbrotView.getX(me.getX()));
mandelbrotTextFields.setCenterY(mandelbrotView.getY(me.getY()));
mandelbrotTextFields.setScale(mandelbrotTextFields.getScale() / 2);
}
/**
* Zoom to the selected box.
* Intentionally chose to let the user only select squares, otherwise it's too easy to mess up the scale
* @param me
*/
private void zoomBox(MouseEvent me) {
double center_x = (mandelbrotView.getX(me.getX())
- mandelbrotView.getX(start_x)) / 2
+ mandelbrotView.getX(start_x);
double center_y = (mandelbrotView.getY(me.getY())
- mandelbrotView.getY(start_y)) / 2
+ mandelbrotView.getY(start_y);
mandelbrotTextFields.setCenterX(center_x);
mandelbrotTextFields.setCenterY(center_y);
double scale = mandelbrotTextFields.getScale()
/ (me.getX() - start_x)
* getWidth();
mandelbrotTextFields.setScale(scale);
}
@Override
public void mouseEntered(MouseEvent me) {}
@Override
public void mouseExited(MouseEvent me) {}
/**
* Erase the old box, draw the new box
* @param me
*/
@Override
public void mouseDragged(MouseEvent me) {
Graphics g = getSafeGraphics();
if (g != null) {
if (dragging) {
eraseZoombox();
}
g.drawRect(start_x, start_y, me.getX() - start_x, me.getX() - start_x);
old_y = old_x = me.getX();
dragging = true;
}
}
/**
* Semi-singleton construction for graphics
* @return
*/
private Graphics getSafeGraphics() {
if (graphics == null) {
graphics = getGraphics();
graphics.setXORMode(Color.white);
}
return graphics;
}
/**
* Erase the old zoombox if it exists
*/
private void eraseZoombox() {
if (start_x < 0 || start_y < 0 || old_x < 0 || old_y < 0)
return;
Graphics g = getSafeGraphics();
if (g != null)
g.drawRect(start_x, start_y, old_x - start_x, old_y - start_x);
}
@Override
public void mouseMoved(MouseEvent me) {}
/**
* Interface to get and set user input
*/
public interface MandelbrotTextFields {
/**
* Set the center X
* @param x
*/
public void setCenterX(double x);
/**
* Set the center Y
* @param y
*/
public void setCenterY(double y);
/**
* Get the scale factor
* @return
*/
public double getScale();
/**
* Set the scale factor
* @param scale
*/
public void setScale(double scale);
/**
* Set the max amount of iterations for the mandel function
* @param repetitions
*/
public void setRepetitions(int repetitions);
}
}
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