workspace/TrainDelayed/src/com/td/HistoryView.java

   1 package com.td;\r
   2 \r
   3 import org.afree.chart.AFreeChart;\r
   4 import org.afree.graphics.geom.RectShape;\r
   5 \r
   6 import android.content.Context;\r
   7 import android.graphics.Canvas;\r
   8 import android.util.AttributeSet;\r
   9 import android.view.MotionEvent;\r
  10 import android.view.View;\r
  11 \r
  12 public class HistoryView extends View {\r
  13     private AFreeChart chart;\r
  14         private int tx = -1;\r
  15         private int ty = -1;\r
  16         private int rr = -1;\r
  17         private static float dw = 1;\r
  18         private HistoryActivity activity;\r
  19         \r
  20     public HistoryView(Context context, AttributeSet attrs) {\r
  21         super(context, attrs);\r
  22     }\r
  23 \r
  24     public void setHistoryActivity(HistoryActivity activity){\r
  25         this.activity = activity;\r
  26     }\r
  27     \r
  28     @Override\r
  29     protected void onDraw(Canvas canvas) {\r
  30         super.onDraw(canvas);\r
  31                 \r
  32         int width = this.getWidth();\r
  33                 int height = this.getHeight();\r
  34                 RectShape chartArea = new RectShape(0.0, 0.0, width, height);\r
  35                 this.chart.draw(canvas, chartArea);\r
  36     }\r
  37 \r
  38     @Override\r
  39     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {\r
  40         int width = (int)(HistoryActivity.W * dw);//measureWidth(widthMeasureSpec);\r
  41                 int height = measureHeight(heightMeasureSpec);\r
  42         setMeasuredDimension(width, height);\r
  43 //      setMeasuredDimension(1000, 300);\r
  44     }\r
  45 \r
  46     private int measureWidth(int measureSpec) {\r
  47                 int result = 0;\r
  48                 //int specMode = MeasureSpec.getMode(measureSpec);\r
  49                 int specSize = MeasureSpec.getSize(measureSpec);\r
  50 \r
  51                 result = specSize;\r
  52 \r
  53                 return result;\r
  54         }\r
  55 \r
  56         private int measureHeight(int measureSpec) {\r
  57                 int result = 0;\r
  58                 //int specMode = MeasureSpec.getMode(measureSpec);\r
  59                 int specSize = MeasureSpec.getSize(measureSpec);\r
  60 \r
  61                 result = specSize;\r
  62                 return result;\r
  63         }\r
  64         \r
  65         public void setChart(AFreeChart chart) {\r
  66         this.chart = chart;\r
  67     }\r
  68         \r
  69         @Override\r
  70         public boolean onTouchEvent(MotionEvent event) {\r
  71                 if (chart == null){\r
  72                         return true;\r
  73                 }\r
  74                 int type = event.getAction();\r
  75                 int count = event.getPointerCount();\r
  76                 \r
  77                 switch (type){\r
  78                 case MotionEvent.ACTION_DOWN:\r
  79                         tx = -1;\r
  80                         ty = -1;\r
  81                         rr = -1;\r
  82                         break;\r
  83                 case MotionEvent.ACTION_MOVE:\r
  84                         int history = event.getHistorySize() / count;\r
  85                         \r
  86                         for (int i = 0; i < history; i++){\r
  87                                 int index1 = event.findPointerIndex(0);\r
  88                                 int index2 = event.findPointerIndex(1);\r
  89 \r
  90                                 if (index1 >= 0 && index2 >= 0){\r
  91                                         int ux1 = (int) event.getHistoricalX(index1, i);\r
  92                                         int uy1 = (int) event.getHistoricalY(index1, i);\r
  93                                         int ux2 = (int) event.getHistoricalX(index2, i);\r
  94                                         int uy2 = (int) event.getHistoricalY(index2, i);\r
  95                                         int ss = (ux1 - ux2) * (ux1 - ux2) + (uy1 - uy2) * (uy1 - uy2);\r
  96                                         if (rr >= 0){\r
  97                                                 float drr = rotateR(rr, ss);\r
  98                                                 if (drr != 0){\r
  99                                                         magnification(drr);                                             \r
 100                                                 }\r
 101                                         }\r
 102                                         rr = ss;                                        \r
 103                                 }\r
 104                                 else if (index1 >= 0 || index2 >= 0){\r
 105                                         int index;\r
 106                                         if (index1 >= 0){\r
 107                                                 index = index1;\r
 108                                         }\r
 109                                         else {\r
 110                                                 index = index2;\r
 111                                         }\r
 112                                         \r
 113                                         int ux = (int) event.getHistoricalX(index, i);\r
 114                                         int uy = (int) event.getHistoricalY(index, i);\r
 115 //                                      if (tx >= 0) {\r
 116 //                                              float rx = rotateXY(tx, ux);\r
 117 //                                              float ry = rotateXY(ty, uy);\r
 118 //                                              if (rx != 0 || ry != 0) {\r
 119 //                                                      drawer.rotate(rx, ry, 0);\r
 120 //                                              }\r
 121 //                                      }\r
 122                                         tx = ux;\r
 123                                         ty = uy;\r
 124                                         rr = -1;\r
 125                                 }\r
 126                         }\r
 127                         int index1 = event.findPointerIndex(0);\r
 128                         int index2 = event.findPointerIndex(1);\r
 129                         if (index1 >= 0 && index2 >= 0){\r
 130                                 int ux1 = (int) event.getX(index1);\r
 131                                 int uy1 = (int) event.getY(index1);\r
 132                                 int ux2 = (int) event.getX(index2);\r
 133                                 int uy2 = (int) event.getY(index2);\r
 134                                 int ss = (ux1 - ux2) * (ux1 - ux2) + (uy1 - uy2) * (uy1 - uy2);\r
 135                                 if (rr >= 0){\r
 136                                         float drr = rotateR(rr, ss);\r
 137                                         if (drr != 0){\r
 138                                                 magnification(drr);                                             \r
 139                                         }\r
 140                                 }\r
 141                                 rr = ss;\r
 142                         }\r
 143                         else if (index1 >= 0 || index2 >= 0){\r
 144                                 int index;\r
 145                                 if (index1 >= 0){\r
 146                                         index = index1;\r
 147                                 }\r
 148                                 else {\r
 149                                         index = index2;\r
 150                                 }\r
 151                                 \r
 152                                 int ux = (int) event.getX(index);\r
 153                                 int uy = (int) event.getY(index);\r
 154 //                              if (tx >= 0) {\r
 155 //                                      float rx = rotateXY(tx, ux);\r
 156 //                                      float ry = rotateXY(ty, uy);\r
 157 //                                      if (rx != 0 || ry != 0) {\r
 158 //                                              drawer.rotate(rx, ry, 0);\r
 159 //                                      }\r
 160 //                              }\r
 161                                 tx = ux;\r
 162                                 ty = uy;\r
 163                                 rr = -1;\r
 164                         }\r
 165                         break;\r
 166                 }\r
 167                 \r
 168                 return true;\r
 169         }\r
 170 \r
 171         private void magnification(float drr) {\r
 172                 dw += drr;\r
 173                 if (dw < 1){\r
 174                         dw = 1;\r
 175                 }\r
 176                 else if (dw > 5){\r
 177                         dw = 5;\r
 178                 }\r
 179         int width = (int)(HistoryActivity.W * dw);\r
 180         this.setMinimumWidth(width);\r
 181         activity.magnification(dw);\r
 182                 this.requestLayout();\r
 183         }\r
 184 \r
 185         private float rotateR(int src, int dst){\r
 186                 if (src > dst){\r
 187                         return -0.5f;\r
 188                 }\r
 189                 else if (src < dst){\r
 190                         return 0.5f;                    \r
 191                 }\r
 192                 else {\r
 193                         return 0.0f;\r
 194                 }\r
 195         }\r
 196 }\r