blob: 0f65e3ee454fd8a7fb522b935a597be503bb344f (
plain) (
blame)
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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace grapher
{
public class Field
{
#region Enums
public enum FieldState
{
Undefined,
Default,
Typing,
Entered,
Unavailable,
}
#endregion Enums
#region Constructors
public Field(TextBox box, Form containingForm, double defaultData)
{
DefaultText = defaultData.ToString("N1");
Box = box;
Data = defaultData;
DefaultData = defaultData;
State = FieldState.Undefined;
ContainingForm = containingForm;
box.KeyDown += new System.Windows.Forms.KeyEventHandler(KeyDown);
SetToDefault();
}
#endregion Constructors
#region Properties
TextBox Box { get; }
Form ContainingForm { get; }
public double Data { get; private set; }
public string DefaultText { get; }
public FieldState State { get; private set; }
private double DefaultData { get; }
#endregion Properties
#region Methods
public void SetToDefault()
{
if (State != FieldState.Default)
{
Box.BackColor = Color.White;
Box.ForeColor = Color.Gray;
State = FieldState.Default;
}
Data = DefaultData;
Box.Text = DefaultText;
ContainingForm.ActiveControl = null;
}
public void SetToTyping()
{
if (State != FieldState.Typing)
{
Box.BackColor = Color.White;
Box.ForeColor = Color.Black;
State = FieldState.Typing;
}
Box.Text = string.Empty;
}
public void SetToEntered()
{
if (State != FieldState.Entered)
{
Box.BackColor = Color.AntiqueWhite;
Box.ForeColor = Color.DarkGray;
State = FieldState.Entered;
}
ContainingForm.ActiveControl = null;
}
public void SetToEntered(double value)
{
SetToEntered();
Data = value;
Box.Text = Data.ToString("N2");
}
public void SetToUnavailable()
{
if (State != FieldState.Unavailable)
{
Box.BackColor = Color.LightGray;
Box.ForeColor = Color.LightGray;
Box.Text = string.Empty;
State = FieldState.Unavailable;
}
}
public void KeyDown(object sender, KeyEventArgs e)
{
switch(State)
{
case FieldState.Default:
if (e.KeyCode == Keys.Enter)
{
SetToDefault();
}
else
{
SetToTyping();
}
break;
case FieldState.Entered:
if (e.KeyCode != Keys.Enter)
{
SetToTyping();
}
break;
case FieldState.Typing:
HandleTyping(sender, e);
break;
case FieldState.Unavailable:
Box.Text = string.Empty;
ContainingForm.ActiveControl = null;
break;
default:
break;
}
}
private void HandleTyping(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
try
{
Data = Convert.ToDouble(((TextBox)sender).Text);
}
catch
{
}
Box.Text = Data.ToString("N2");
e.Handled = true;
e.SuppressKeyPress = true;
SetToEntered();
}
}
#endregion Methods
}
}
|