gvsig-raster / org.gvsig.raster / trunk / org.gvsig.raster / org.gvsig.raster.swing / org.gvsig.raster.swing.impl / src / main / java / org / gvsig / raster / swing / impl / canvas / layer / function / DefaultStraightLine.java @ 2584
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.swing.impl.canvas.layer.function; |
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import java.awt.Color; |
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import java.awt.Component; |
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import java.awt.Cursor; |
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import java.awt.Graphics; |
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import java.awt.Image; |
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import java.awt.Point; |
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import java.awt.Toolkit; |
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import java.awt.event.MouseEvent; |
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import java.awt.image.MemoryImageSource; |
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import java.util.ArrayList; |
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import java.util.List; |
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import org.gvsig.raster.swing.gcanvas.DrawableElement; |
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import org.gvsig.raster.swing.gcanvas.StraightLine; |
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import org.gvsig.raster.swing.impl.canvas.DefaultGCanvas; |
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import org.gvsig.raster.swing.impl.canvas.layer.DefaultInfoLayer; |
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/**
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* Representa una linea recta con puntos de arrastre para la ecualizaci?n de
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* un histograma y realce lineales y dencity slicing.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class DefaultStraightLine extends DefaultBaseFunction implements StraightLine { |
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|
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/**
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* Representa un punto seleccionado sobre el canvas. Este es
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* dibujado como un peque?o cuadrado.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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class Square { |
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private double x = 0.0D; |
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private double y = 0.0D; |
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private int width = 6; |
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private Color color = Color.WHITE; |
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|
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/**
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* Constructor. Calcula las esquinas del cuadrado
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* @param p
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*/
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public Square(double x, double y) { |
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setPosition(x, y); |
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} |
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/**
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* Constructor. Calcula las esquinas del cuadrado
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* @param p
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*/
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public Square(int x, int y) { |
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setPosition(x, y); |
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} |
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/**
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* Asigna una nueva posici?n al punto
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* @param x
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*/
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public void setPosition(double x, double y) { |
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this.x = x;
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this.y = y;
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if (this.x > 1.0D) this.x = 1.0D; |
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if (this.x < 0.0D) this.x = 0.0D; |
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if (this.y > 1.0D) this.y = 1.0D; |
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if (this.y < 0.0D) this.y = 0.0D; |
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} |
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/**
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* Asigna una nueva posici?n al punto
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* @param x
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*/
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public void setPosition(int x, int y) { |
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setPosition(pixelToValueX(x), pixelToValueY(y)); |
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} |
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public int getPixelX() { |
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return valueToPixelX(x);
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} |
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public int getPixelY() { |
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return valueToPixelY(y);
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} |
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public double getX() { |
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return x;
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} |
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public double getY() { |
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return y;
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} |
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/**
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* Dibuja el cuadrado
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* @param g
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*/
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protected void paint(Graphics g) { |
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g.setColor(color); |
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g.drawRect((int) valueToPixelX(x) - (width >> 1), (int) valueToPixelY(y) - (width >> 1), (int) width, (int)width); |
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} |
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/**
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* Dibuja el cursor del raton
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* @param g
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*/
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protected void paintCursor(Graphics g) { |
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g.setColor(Color.white);
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g.drawLine(valueToPixelX(x) - 6, valueToPixelY(y), valueToPixelX(x) + 6, valueToPixelY(y)); |
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g.drawLine(valueToPixelX(x), valueToPixelY(y) - 6, valueToPixelX(x), valueToPixelY(y) + 6); |
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} |
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/**
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* Informa de si el punto pasado por par?metro cae dentro del cuadro o no
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* @param p Punto a comprobar
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* @return true si el punto est? dentro y false si no lo est?
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*/
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public boolean isInside(Point p) { |
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if (p.getX() < (valueToPixelX(x) - (width >> 1))) |
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return false; |
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if (p.getX() > (valueToPixelX(x) + (width >> 1))) |
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return false; |
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if (p.getY() < (valueToPixelY(y) - (width >> 1))) |
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return false; |
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if (p.getY() > (valueToPixelY(y) + (width >> 1))) |
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return false; |
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return true; |
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} |
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/**
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* Asigna el color del cuadrado
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* @param c Color
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*/
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public void setColor(Color c) { |
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this.color = c;
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} |
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private int valueToPixelX(double value) { |
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value = minx + ((maxx - minx) * value); |
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return (int) Math.round(canvas.getCanvasMinX() + border + ((canvas.getCanvasMaxX() - canvas.getCanvasMinX() - (border * 2)) * value)); |
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} |
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private int valueToPixelY(double value) { |
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value = 1.0D - value;
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return (int) Math.round(canvas.getCanvasMinY() + border + ((canvas.getCanvasMaxY() - canvas.getCanvasMinY() - (border * 2)) * value)); |
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} |
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} |
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/**
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* Lista de cuadrados que intersectan con la recta
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*/
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protected List<Square> listSquare = new ArrayList<Square>(); |
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private int pointDragged = -1; |
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private Cursor transparentCursor = null; |
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private boolean showSquares = true; |
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private int border = 2; |
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/**
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* Constructor. Asigna el color
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* @param c
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*/
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public DefaultStraightLine(Color c) { |
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int[] pixels = new int[16 * 16]; |
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Image image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16)); |
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transparentCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0), "invisibleCursor"); |
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setColor(c); |
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clearSquares(); |
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addSquare(0.0D, 0.0D); |
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addSquare(1.0D, 1.0D); |
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} |
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public void clearSquares() { |
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listSquare.clear(); |
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} |
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public void addSquare(double x, double y) { |
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listSquare.add(new Square(x, y));
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} |
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/**
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* Dibujado de las l?neas y cuadros sobre el canvas
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*/
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protected void paint(Graphics g) { |
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super.paint(g);
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g.setColor(color); |
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// Dibujamos una l?nea desde un punto hasta el siguiente
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Square square = null;
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Square lastSquare = null;
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if (listSquare.size() > 0) { |
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square = ((Square) listSquare.get(0));
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g.drawLine(canvas.getCanvasMinX(), square.getPixelY(), square.getPixelX(), square.getPixelY()); |
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} |
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for (int i = 0; i < listSquare.size(); i++) { |
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lastSquare = square; |
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square = ((Square) listSquare.get(i)); |
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if (lastSquare != null) |
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g.drawLine(lastSquare.getPixelX(), lastSquare.getPixelY(), square.getPixelX(), square.getPixelY()); |
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} |
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if (listSquare.size() > 0) { |
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square = ((Square) listSquare.get(listSquare.size() - 1));
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g.drawLine(square.getPixelX(), square.getPixelY(), canvas.getCanvasMaxX(), square.getPixelY()); |
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} |
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// Dibujamos los cuadrados de los puntos
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if (showSquares) {
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for (int i = 0; i < listSquare.size(); i++) { |
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square = ((Square) listSquare.get(i)); |
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square.setColor(color); |
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if (pointDragged != i)
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square.paint(g); |
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else
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square.paintCursor(g); |
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} |
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} |
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if (pointDragged != -1) { |
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setInfoPoint(pointDragged); |
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} |
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} |
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/**
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* Visualiza la posicion de un punto en la barra de estado
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* @param square
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*/
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private void setInfoPoint(int point) { |
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List<DrawableElement> list = canvas.getDrawableElements(DefaultInfoLayer.class);
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if (list.size() > 0) { |
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DefaultInfoLayer infoLayer = (DefaultInfoLayer) list.get(0);
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if (point != -1) { |
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Square square = ((Square) listSquare.get(point)); |
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double value = minx + (square.getX() * (maxx - minx));
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value = infoLayer.getMin() + (value * (infoLayer.getMax() - infoLayer.getMin())); |
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infoLayer.setStatusLeft("In: " + clipDecimals(value, 1)); |
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infoLayer.setStatusRight("Out: " + Math.round(square.getY() * 255.0D)); |
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} else {
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infoLayer.setStatusLeft(null);
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infoLayer.setStatusRight(null);
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} |
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} |
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} |
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public double clipDecimals(double num, int n) { |
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long m = (long) Math.pow(10, n); |
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long aux = Math.round(num * m); |
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return (double) aux / (double) m; |
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} |
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/**
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* Asigna el objeto JComponent donde se pintan los elementos. Inicializa los puntos
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* de inicio y fin de l?nea y asigna los listener
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* @param canvas
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*/
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public void setCanvas(DefaultGCanvas canvas) { |
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super.setCanvas(canvas);
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} |
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/**
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* Inserta un elemento (cuadrado) en el array entre los dos cuadrados entre los que se
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* encuentre el valor de su X, as? siempre est?n ordenados en el array por valor de X.
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* @param element
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* @return Devuelve la posici?n del elemento insertado, en caso de no poder insertarse
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* devolver? -1
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*/
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private int insert(Square element) { |
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for (int i = 0; i < (listSquare.size() - 1); i++) { |
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double sqX = ((Square) listSquare.get(i)).getX();
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double sqNextX = ((Square) listSquare.get(i + 1)).getX(); |
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if (element.getX() >= sqX && element.getX() <= sqNextX) {
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listSquare.add(i + 1, element);
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return i + 1; |
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} |
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} |
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return -1; |
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} |
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/**
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* Se captura el punto a arrastrar, en caso de que no coincida con un punto,
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* se inserta
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*/
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public boolean mousePressed(MouseEvent e) { |
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for (int i = 0; i < listSquare.size(); i++) { |
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if (((Square) listSquare.get(i)).isInside(e.getPoint())) {
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if ((e.getModifiersEx() & MouseEvent.BUTTON3_DOWN_MASK) != 0) { |
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if ((i == 0) || ((i + 1) == listSquare.size())) |
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continue;
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pointDragged = -1;
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listSquare.remove(i); |
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((Component)canvas).repaint();
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return false; |
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} |
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if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) != 0) { |
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pointDragged = i; |
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this.mouseDragged(e);
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return false; |
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} |
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} |
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} |
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if ((e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == 0) |
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return true; |
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// En caso de que nadie lo este tratando, osea, un cursor normal
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if (((Component)canvas).getCursor().getType() == Cursor.DEFAULT_CURSOR) { |
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pointDragged = insert(new Square(e.getX(), e.getY()));
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this.mouseDragged(e);
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return false; |
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} |
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return true; |
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} |
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/**
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* Inicializamos el punto arrastrado a un valor fuera del array
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*/
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public boolean mouseReleased(MouseEvent e) { |
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pointDragged = -1;
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setInfoPoint(-1);
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((Component)canvas).repaint();
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canvas.callDataChanged("line", this); |
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return true; |
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} |
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/**
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* Cuando se ha pinchado un punto y se arrastra se define aqu? su comportamiento.
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*/
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public boolean mouseDragged(MouseEvent e) { |
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if (pointDragged >= 0) { |
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((Component)canvas).setCursor(transparentCursor);
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int minX = canvas.getCanvasMinX();
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int minY = canvas.getCanvasMinY();
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int maxX = canvas.getCanvasMaxX();
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int maxY = canvas.getCanvasMaxY();
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// Controlamos que no se salga de los l?mites
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int x = Math.min(Math.max(e.getX(), minX), maxX); |
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int y = Math.min(Math.max(e.getY(), minY), maxY); |
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Square point = ((Square) listSquare.get(pointDragged)); |
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try {
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// El primer punto no se desplaza en X
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if (pointDragged == 0) { |
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point.setPosition(minX, y); |
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return false; |
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} |
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// El ?ltimo punto no se desplaza en X
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if (pointDragged == (listSquare.size() - 1)) { |
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point.setPosition(maxX, y); |
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return false; |
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} |
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// Puntos centrales
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point.setPosition(x, y); |
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// Arrastra a los de abajo si la X es menor que los inferiores
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for (int i = 0; i < pointDragged; i++) { |
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Square lowPoint = ((Square) listSquare.get(i)); |
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if (lowPoint.getPixelX() >= x) {
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lowPoint.setPosition(x, lowPoint.getPixelY()); |
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for (int j = i + 1; listSquare.get(j) != point;) { |
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listSquare.remove(j); |
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pointDragged--; |
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} |
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break;
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} |
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} |
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// Arrastra a los de arriba si la X es mayor que los superiores
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for (int i = listSquare.size() - 1; i > pointDragged; i--) { |
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Square upperPoint = ((Square) listSquare.get(i)); |
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if (upperPoint.getPixelX() <= x) {
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upperPoint.setPosition(x, upperPoint.getPixelY()); |
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for (int j = i - 1; listSquare.get(j) != point;) { |
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listSquare.remove(j); |
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j--; |
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} |
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break;
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} |
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} |
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} finally {
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// Siempre repintamos
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((Component)canvas).repaint();
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canvas.callDataDragged("line", this); |
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} |
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return false; |
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} |
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return true; |
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} |
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|
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/**
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* Variable para saber si se ha visualizado alguna informacion
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*/
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boolean last = false; |
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public boolean mouseMoved(MouseEvent e) { |
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for (int i = 0; i < listSquare.size(); i++) { |
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if (((Square)listSquare.get(i)).isInside(e.getPoint())) {
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((Component)canvas).setCursor(new Cursor(Cursor.MOVE_CURSOR)); |
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setInfoPoint(i); |
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((Component)canvas).repaint();
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last = true;
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return false; |
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} |
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} |
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if (last) {
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setInfoPoint(-1);
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((Component)canvas).repaint();
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last = false;
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} |
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return true; |
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} |
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public double[] getInValues(double min, double max) { |
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double[] in = getPercentInValues(); |
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for (int i = 0; i < in.length; i++) |
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in[i] = min + (in[i] * (max - min)); |
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return in;
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} |
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public int[] getOutValues() { |
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double[] values = getPercentOutValues(); |
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int[] out = new int[values.length]; |
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for (int i = 0; i < values.length; i++) |
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out[i] = (int) Math.round(values[i] * 255.0D); |
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return out;
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} |
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|
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public double[] getPercentInValues() { |
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double[] in = new double[listSquare.size() + 2]; |
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for (int i = 0; i < listSquare.size(); i++) { |
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Square square = ((Square) listSquare.get(i)); |
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in[i + 1] = minx + ((maxx - minx) * square.getX());
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} |
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in[0] = 0.0D; |
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in[in.length - 1] = 1.0D; |
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return in;
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} |
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|
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public double[] getPercentOutValues() { |
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double[] out = new double[listSquare.size() + 2]; |
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for (int i = 0; i < listSquare.size(); i++) { |
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Square square = ((Square) listSquare.get(i)); |
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out[i + 1] = square.getY();
|
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} |
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out[0] = out[1]; |
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out[out.length - 1] = out[out.length - 2]; |
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return out;
|
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} |
| 474 |
|
| 475 |
public void firstActions() {} |
| 476 |
public void firstDrawActions() {} |
| 477 |
|
| 478 |
/**
|
| 479 |
* @param showSquares the showSquares to set
|
| 480 |
*/
|
| 481 |
public void setShowSquares(boolean showSquares) { |
| 482 |
this.showSquares = showSquares;
|
| 483 |
} |
| 484 |
|
| 485 |
protected double pixelToValueX(int pixel) { |
| 486 |
double value = ((double) (pixel - canvas.getCanvasMinX() - border) / (double) (canvas.getCanvasMaxX() - canvas.getCanvasMinX() - (border * 2.0D))); |
| 487 |
|
| 488 |
value = (value - minx) / (maxx - minx); |
| 489 |
|
| 490 |
return value;
|
| 491 |
} |
| 492 |
|
| 493 |
protected double pixelToValueY(int pixel) { |
| 494 |
double div = (double) (canvas.getCanvasMaxY() - canvas.getCanvasMinY() - (border * 2.0D)); |
| 495 |
if (div == 0.0D) |
| 496 |
return 0.0D; |
| 497 |
|
| 498 |
return (1.0D - ((double) (pixel - canvas.getCanvasMinY() - border) / div)); |
| 499 |
} |
| 500 |
|
| 501 |
public int getFunctionType() { |
| 502 |
return 0; |
| 503 |
} |
| 504 |
|
| 505 |
/**
|
| 506 |
* En una funci?n lineal da igual lo que devuelva, pero es interesante para sus
|
| 507 |
* clases derivadas
|
| 508 |
* @return
|
| 509 |
*/
|
| 510 |
public double getValueFunction() { |
| 511 |
return 0.0; |
| 512 |
} |
| 513 |
} |