Making a basic paint program

1package com.lcc.java2final_lefelhocz;
2
3import android.graphics.Canvas;
4import android.graphics.Color;
5import android.graphics.Paint;
6
7public class MyLine extends MyDrawable {
8float startX;
9float startY;
10float stopX;
11float stopY;
12static int color = Color.BLACK;
13Canvas canvas = new Canvas();
14Paint paint = new Paint();
15
16public MyLine(float aStartX, float aStartY, float aStopX, float aStopY, int aColor)
17{
18 startX = aStartX;
19 startY = aStartY;
20 stopX = aStopX;
21 stopY = aStopY;
22 color = aColor;
23}
24
25 public void draw(Canvas canvas, Paint paint) {
26
27 // TODO Auto-generated method stub
28 paint.setColor(color);
29canvas.drawLine(startX, startY, stopX, stopY, paint);
30 }
31
32}

1// Project: Java2Paint
2// File: LineDrawView.java
3// Date: 4/16/13
4// Description: Final Exam
5//
6package com.lcc.java2final_lefelhocz;
7
8
9
10import android.annotation.SuppressLint;
11import android.content.Context;
12import android.graphics.Canvas;
13import android.graphics.Color;
14import android.graphics.Paint;
15import android.view.MotionEvent;
16import android.view.View;
17
18@SuppressLint("DrawAllocation")
19public class LineDrawView extends View
20{
21 private float currentX;
22 private float currentY;
23 private float startX=0;
24 private float startY=0;
25
26
27 private int drawType = 3;
28 private Paint paintStroke;
29
30 public LineDrawView(Context context)
31 {
32 // call the super class constructor
33 super(context);
34
35 // The Paint class holds the style and color information about how to draw geometries, text and bitmaps.
36 // For efficiency create the paint objects in the constructor, not in draw
37 // paint.setStrokeWidth(10); // works on lines
38 // You can change the color of Paint without effecting objects already drawn
39 // You can NOT change the style of Paint without effecting objects already drawn
40 // The Style, TextSize apply to all objects drawn with the paint.
41
42 new Paint();
43
44 // added for lab12
45 // Create a Paint Object with Style=Stroke
46 paintStroke = new Paint();
47 paintStroke.setStyle(Paint.Style.STROKE);
48
49 // set the background color when the view is created
50 this.setBackgroundColor(Color.LTGRAY);
51 }
52
53
54
55 protected void onDraw(Canvas canvas, Paint paint)
56 {
57 // Draw a Red Diagonal line from upper left corner to bottom right corner
58
59
60 // added for lab12
61 switch(drawType){
62 case 1:
63 MyDrawable MyLine = (MyDrawable) new Object();
64 MyLine.draw(canvas, paint);
65 return;
66 case 2:
67
68 MyDrawable MyCircle = (MyDrawable) new Object();
69 MyCircle.draw(canvas, paint);
70
71
72 return;
73
74 case 3:
75
76 MyDrawable MyRectangle = (MyDrawable) new Object();
77 MyRectangle.draw(canvas, paint);
78
79 return;}
80 }
81
82 @Override
83 public boolean onTouchEvent(MotionEvent event)
84 {
85 // get the current X and Y position from the event
86 currentX = event.getX();
87 currentY = event.getY();
88
89 // switch on the touch event action
90 switch(event.getAction())
91 {
92 case MotionEvent.ACTION_DOWN:
93
94 // start the line
95 startX = currentX;
96 startY = currentY;
97 invalidate();
98 return true;
99 case MotionEvent.ACTION_UP:
100
101 invalidate();
102 return true;
103 case MotionEvent.ACTION_MOVE:
104
105
106 invalidate();
107 return true;
108 default:
109 return super.onTouchEvent(event);
110 }
111 }
112
113 // Called back when the view is first created or its size changes.
114 @Override
115 public void onSizeChanged(int width, int height, int oldWidth, int oldHeight)
116 {
117 }
118
119 // added for lab 12
120 public void setDrawType(int aDrawType)
121 {
122 drawType = aDrawType;
123 }
124}

1package com.lcc.java2final_lefelhocz;
2
3import android.graphics.Canvas;
4import android.graphics.Color;
5import android.graphics.Paint;
6
7public class MyCircle extends MyDrawable {
8 Canvas canvas = new Canvas();
9 Paint paint = new Paint();
10 private float startX;
11 private float startY;
12 private float endX;
13 private float endY;
14 static int color = Color.BLACK;
15
16
17 public MyCircle(float aStartX, float aStartY, float aStopX, float aStopY, int aColor)
18 {
19 startX = aStartX;
20 startY = aStartY;
21 endX = aStopX;
22 endY = aStopY;
23 color = aColor;
24 }
25 public void draw(Canvas canvas, Paint paint) {
26 // TODO Auto-generated method stub
27 paint.setColor(color);
28 canvas.drawCircle(startX, endX, (float) Math.sqrt((Math.pow(endX - startX,2) + Math.pow(endY - startY, 2))), paint);
29 }
30
31 }