From 634e3f8c2adef630a29f3e30efa05f379c359141 Mon Sep 17 00:00:00 2001
From: Victor <melnikukr@mail.ru>
Date: Tue, 4 Jun 2013 00:20:51 +0300
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---
 src/util/GraphicPanel.java | 109 +++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/util/GraphicPanel.java

diff --git a/src/util/GraphicPanel.java b/src/util/GraphicPanel.java
new file mode 100644
index 0000000..10d3691
--- /dev/null
+++ b/src/util/GraphicPanel.java
@@ -0,0 +1,109 @@
+package util;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Point;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionAdapter;
+import java.awt.geom.Point2D;
+import java.util.ArrayList;
+import javax.swing.JPanel;
+
+/**
+ * @author aNNiMON
+ */
+public abstract class GraphicPanel extends JPanel {
+    
+    // Цвета для графиков.
+    private static final Color[] COLORS = {
+        Color.BLUE, new Color(0x00C000), Color.CYAN, Color.MAGENTA
+    };
+    
+    private final ArrayList<Point2D[]> pointsHolder;
+    private Point clickedPoint;
+    
+    public GraphicPanel() {
+        pointsHolder = new ArrayList<Point2D[]>();
+        setBackground(Color.WHITE);
+        addMouseListener(new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent evt) {
+                formMousePressed(evt);
+            }
+        });
+        addMouseMotionListener(new MouseMotionAdapter() {
+            @Override
+            public void mouseDragged(MouseEvent evt) {
+                formMousePressed(evt);
+            }
+        });
+        clickedPoint = new Point(0, 0);
+    }
+    
+    public void addPoints(Point2D[] input) {
+        pointsHolder.add(input);
+    }
+    
+    @Override
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        final int width = g.getClipBounds().width;
+        final int height = g.getClipBounds().height;
+        
+        if (pointsHolder.size() <= 0) return;
+        
+        // Расчет коэфициентов растягивания
+        Point2D[] input = pointsHolder.get(0);
+        double xMin = input[0].getX();
+        double xMax = input[0].getX();
+        double yMin = input[0].getY();
+        double yMax = input[0].getY();
+        
+        for (int j = 0; j < pointsHolder.size(); j++) {
+            input = pointsHolder.get(j);
+            for (int i = 0; i < input.length; i++) {
+                Point2D point = input[i];
+                if (xMin > point.getX()) xMin = point.getX();
+                else if (xMax < point.getX()) xMax = point.getX();
+                if (yMin > point.getY()) yMin = point.getY();
+                else if (yMax < point.getY()) yMax = point.getY();
+            }
+        }
+        
+        double dx = width / (xMax - xMin);
+        double dy = height / (yMax - yMin);
+        
+        // Рисование графиков
+        for (int j = 0; j < pointsHolder.size(); j++) {
+            g.setColor(COLORS[j]);
+            input = pointsHolder.get(j);
+            
+            for (int i = 0; i < input.length; i++) {
+                Point2D p = input[i];
+                plot(g, (p.getX() - xMin) * dx, height - (p.getY() - yMin) * dy);
+            }
+        }
+        
+        // Отображение позиции выбранной точки
+        g.setColor(Color.RED);
+        double x = clickedPoint.getX() / dx + xMin;
+        int graphX = (int) ((x - xMin) * dx);
+        g.drawLine(graphX, 0, graphX, height);
+        
+        // Подписи
+        drawLabels(g, x);
+    }
+    
+    protected abstract void drawLabels(Graphics g, double x);
+    
+    protected void plot(Graphics g, double x, double y) {
+        g.drawLine((int) x, (int) y, (int) x, (int) y);
+    }
+    
+    private void formMousePressed(java.awt.event.MouseEvent evt) {                                  
+        clickedPoint = evt.getPoint();
+        repaint();
+    } 
+    
+}