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/*
* Copyright 1997 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.swing;
import javax.swing.JPanel;
/**
* Root class for 2 dimensional X,Y controller for wave editors, Theremins, etc. Maps pixel
* coordinates into "world" coordinates.
*
* @author (C) 1997 Phil Burk, SoftSynth.com
*/
public class XYController extends JPanel {
double minWorldX = 0.0;
double maxWorldX = 1.0;
double minWorldY = 0.0;
double maxWorldY = 1.0;
public XYController() {
}
public XYController(double minWX, double minWY, double maxWX, double maxWY) {
setMinWorldX(minWX);
setMaxWorldX(maxWX);
setMinWorldY(minWY);
setMaxWorldY(maxWY);
}
/**
* Set minimum World coordinate value for the horizontal X dimension. The minimum value
* corresponds to the left of the component.
*/
public void setMinWorldX(double minWX) {
minWorldX = minWX;
}
public double getMinWorldX() {
return minWorldX;
}
/**
* Set maximum World coordinate value for the horizontal X dimension. The minimum value
* corresponds to the right of the component.
*/
public void setMaxWorldX(double maxWX) {
maxWorldX = maxWX;
}
public double getMaxWorldX() {
return maxWorldX;
}
/**
* Set minimum World coordinate value for the vertical Y dimension. The minimum value
* corresponds to the bottom of the component.
*/
public void setMinWorldY(double minWY) {
minWorldY = minWY;
}
public double getMinWorldY() {
return minWorldY;
}
/**
* Set maximum World coordinate value for the vertical Y dimension. The maximum value
* corresponds to the top of the component.
*/
public void setMaxWorldY(double maxWY) {
maxWorldY = maxWY;
}
public double getMaxWorldY() {
return maxWorldY;
}
/** Convert from graphics coordinates (pixels) to world coordinates. */
public double convertGXtoWX(int gx) {
int width = getWidth();
return minWorldX + ((maxWorldX - minWorldX) * gx) / width;
}
public double convertGYtoWY(int gy) {
int height = getHeight();
return minWorldY + ((maxWorldY - minWorldY) * (height - gy)) / height;
}
/** Convert from world coordinates to graphics coordinates (pixels). */
public int convertWXtoGX(double wx) {
int width = getWidth();
return (int) (((wx - minWorldX) * width) / (maxWorldX - minWorldX));
}
public int convertWYtoGY(double wy) {
int height = getHeight();
return height - (int) (((wy - minWorldY) * height) / (maxWorldY - minWorldY));
}
/** Clip wx to the min and max World X values. */
public double clipWorldX(double wx) {
if (wx < minWorldX)
wx = minWorldX;
else if (wx > maxWorldX)
wx = maxWorldX;
return wx;
}
/** Clip wy to the min and max World Y values. */
public double clipWorldY(double wy) {
if (wy < minWorldY)
wy = minWorldY;
else if (wy > maxWorldY)
wy = maxWorldY;
return wy;
}
}
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