1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
namespace _103303058_0601_01
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
g = this.CreateGraphics();
pen1 = new Pen(Color.GreenYellow, 3);
ClickPoint = new Point[99];
PointCounter = 0;
fromClick = Color.PowderBlue;
}

private void Form1_Paint(object sender, PaintEventArgs e)
{
g.Clear(fromClick);

SolidBrush brush = new SolidBrush(Color.Gold);
Font font = new Font("標楷體", 17);

g.DrawString("繪至黃色文字，字體樣式為標楷體，字型大小17", font, brush, 35,20);

//g.DrawLine(pen1, new Point(0, 0), new Point(100, 100));
for (int i = 0; i <= PointCounter; i = i + 2)
{
g.DrawLine(pen1, ClickPoint[i], ClickPoint[i + 1]);
}

}

private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left) //將起點存入
{
ClickPoint[PointCounter] = new Point(e.X, e.Y);
PointCounter += 1;
}
else if (e.Button == MouseButtons.Right)
{
g.DrawRectangle(pen1, 0, 0, 300, 300);
}
}

private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left) //將終點存入
{
ClickPoint[PointCounter] = new Point(e.X, e.Y);
PointCounter += 1;
Form1_Paint(sender, null);
}
}

private void Form1_Click(object sender, EventArgs e)
{
fromClick = Color.SkyBlue;
}

private void Form1_DoubleClick(object sender, EventArgs e)
{
fromClick = Color.Silver;
}
}
}

小畫家程式