C# カラーピッカーのスライダーを作ってみた その２

C#たんかわいいよC#たん　もでりんぐしたい＞＜


先日から引き続きカラーピッカー用のスライダーを作ってみた。
変更点は色選択を配列で渡すように変更して、２色以上のグラデーションに対応。

これでHSVのHのスライダーが作れるようになった＾＾

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1. using System;  
2. using System.ComponentModel;  
3. using System.Drawing;  
4. using System.Windows.Forms;  
5. using System.Drawing.Drawing2D;  
6.   
7. public partial class GradationSlider : Control  
8. {  
9.   
10.     // イベントの宣言  
11.     [Description("コントロールの値が変更するとき発生します。")]  
12.     [Category("アクション")]  
13.     public event EventHandler ValueChanged;  
14.   
15.     // プロパティ  
16.     private int _maximum = 100;  
17.     public int Maximum  
18.     {  
19.         set  
20.         {  
21.             this._maximum = value;  
22.         }  
23.         get  
24.         {  
25.             return this._maximum;  
26.         }  
27.     }  
28.   
29.     public int Minimum { get; set; }  
30.   
31.     private int _value;  
32.     public int Value  
33.     {  
34.         set  
35.         {  
36.             this._value = value;  
37.             if (ValueChanged != null && Value >= Minimum && Value <= Maximum) ValueChanged(this, new EventArgs());  
38.             this.Refresh();  
39.         }  
40.         get  
41.         {  
42.             return this._value;  
43.         }  
44.     }  
45.   
46.     private Color[] _gradationColor;  
47.     public Color[] GradationColor  
48.     {  
49.         set  
50.         {  
51.             this._gradationColor = value;  
52.             drawGradation();  
53.             this.Refresh();  
54.         }  
55.         get  
56.         {  
57.   
58.             return this._gradationColor;  
59.         }  
60.     }  
61.   
62.     public GradationSlider()  
63.     {  
64.         InitializeComponent();  
65.   
66.         this.SetStyle(ControlStyles.ResizeRedraw, true);  
67.         this.SetStyle(ControlStyles.DoubleBuffer, true);  
68.         this.SetStyle(ControlStyles.UserPaint, true);  
69.         this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);  
70.   
71.         this.Resize += new System.EventHandler(this.CSlider_Resize);  
72.         this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseMove);  
73.         this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseDown);  
74.         this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseUp);  
75.         this.MouseLeave += new System.EventHandler(this.CSlider_MouseLeave);  
76.         this.MouseEnter += new System.EventHandler(this.CSlider_MouseEnter);  
77.   
78.         drawTick();  
79.     }  
80.   
81.     // 描画  
82.     //針の描画  
83.     private Bitmap tick;  
84.     private void drawTick()  
85.     {  
86.         tick = new Bitmap(10, 10);  
87.   
88.         Graphics g = Graphics.FromImage(tick);  
89.         g.SmoothingMode = SmoothingMode.HighQuality;  
90.         Point[] point = {   new Point(5,1), new Point(9,5),  
91.                                 new Point(9,7), new Point(8,8),  
92.                                 new Point(2,8), new Point(1,7),  
93.                                 new Point(1,5), new Point(5,1) };  
94.         Brush b = new SolidBrush(Color.White);  
95.         g.FillPolygon(b, point);  
96.         Pen p = new Pen(Color.Black, 1);  
97.         if (activeFlag == true)  
98.         {  
99.             p = new Pen(Color.Brown, 1);  
100.         }  
101.         g.DrawLines(p, point);  
102.         g.Dispose();  
103.     }  
104.   
105.     protected override void OnPaint(PaintEventArgs pe)  
106.     {  
107.         base.OnPaint(pe);  
108.         drawGradation();  
109.         pe.Graphics.DrawImage(gradation, 5, 0, gradation.Width, gradation.Height);  
110.         pe.Graphics.DrawImage(tick, (Value * gradation.Width) / (Maximum - Minimum), gradation.Height);  
111.   
112.     }  
113.   
114.     //グラデーションの描画  
115.     private Bitmap gradation;  
116.     private void drawGradation()  
117.     {  
118.         if (this.Width > 10 && this.Height > 10)  
119.         {  
120.             Size gradationSize = new Size(this.Width - 10, this.Height - 10);  
121.   
122.             gradation = new Bitmap(gradationSize.Width, gradationSize.Height);  
123.             Graphics g = Graphics.FromImage(gradation);  
124.             LinearGradientBrush lgb =  
125.                 new LinearGradientBrush(new Rectangle(0, 0, gradationSize.Width, gradationSize.Height),  
126.                     Color.Black, Color.White, LinearGradientMode.Horizontal);  
127.   
128.             //多色用  
129.   
130.   
131.             if (GradationColor != null && GradationColor.Length >= 2)  
132.             {  
133.                 // ColorBlendクラスを生成   
134.                 ColorBlend cb = new ColorBlend();  
135.                 cb.Colors = GradationColor;  
136.                 float[] Position = new float[GradationColor.Length];  
137.                 for (int i = 0; i < GradationColor.Length; i++)  
138.                 {  
139.                     Position[i] = (1.0f / (GradationColor.Length - 1)) * (i);  
140.                 }  
141.   
142.                 cb.Positions = Position;  
143.                 // ブラシのInterpolationColorsに設定   
144.                 lgb.InterpolationColors = cb;  
145.             }  
146.   
147.   
148.             g.FillRectangle(lgb, new Rectangle(0, 0, gradationSize.Width, gradationSize.Height));  
149.   
150.             //枠線  
151.             Pen p = new Pen(Color.Black, 1);  
152.             if (activeFlag == true)  
153.             {  
154.                 p = new Pen(Color.Brown, 1);  
155.             }  
156.   
157.             g.DrawRectangle(p, 0, 0, gradationSize.Width - 1, gradationSize.Height - 1);  
158.             lgb.Dispose();  
159.             g.Dispose();  
160.         }  
161.   
162.     }  
163.   
164.   
165.     //リサイズ時、グラデーションの再描画  
166.     private void CSlider_Resize(object sender, EventArgs e)  
167.     {  
168.         drawGradation();  
169.         this.Refresh();  
170.     }  
171.   
172.   
173.     //プロパティ  
174.     private bool mouseDown = false;  
175.     private void CSlider_MouseDown(object sender, MouseEventArgs e)  
176.     {  
177.         Value = (int)(((float)(e.X - 5) / (this.Width - 10)) * (Maximum - Minimum));  
178.         if (Value <= Minimum) Value = Minimum;  
179.         if (Value >= Maximum) Value = Maximum;  
180.   
181.         if (ValueChanged != null) ValueChanged(this, new EventArgs());  
182.   
183.         mouseDown = true;  
184.     }  
185.   
186.     private void CSlider_MouseMove(object sender, MouseEventArgs e)  
187.     {  
188.         if (mouseDown == true)  
189.         {  
190.             Value = (int)(((float)(e.X - 5) / (this.Width - 10)) * (Maximum - Minimum));  
191.             if (Value <= Minimum) Value = Minimum;  
192.             if (Value >= Maximum) Value = Maximum;  
193.   
194.             if (ValueChanged != null) ValueChanged(this, new EventArgs());  
195.         }  
196.     }  
197.   
198.     private void CSlider_MouseUp(object sender, MouseEventArgs e)  
199.     {  
200.         mouseDown = false;  
201.     }  
202.   
203.   
204.     private bool activeFlag = false;  
205.     private void CSlider_MouseEnter(object sender, EventArgs e)  
206.     {  
207.         activeFlag = true;  
208.   
209.         drawGradation();  
210.         drawTick();  
211.         this.Refresh();  
212.     }  
213.   
214.     private void CSlider_MouseLeave(object sender, EventArgs e)  
215.     {  
216.         activeFlag = false;  
217.   
218.         drawGradation();  
219.         drawTick();  
220.         this.Refresh();  
221.     }  
222. }  

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

public partial class GradationSlider : Control
{

    // イベントの宣言
    [Description("コントロールの値が変更するとき発生します。")]
    [Category("アクション")]
    public event EventHandler ValueChanged;

    // プロパティ
    private int _maximum = 100;
    public int Maximum
    {
        set
        {
            this._maximum = value;
        }
        get
        {
            return this._maximum;
        }
    }

    public int Minimum { get; set; }

    private int _value;
    public int Value
    {
        set
        {
            this._value = value;
            if (ValueChanged != null && Value >= Minimum && Value <= Maximum) ValueChanged(this, new EventArgs());
            this.Refresh();
        }
        get
        {
            return this._value;
        }
    }

    private Color[] _gradationColor;
    public Color[] GradationColor
    {
        set
        {
            this._gradationColor = value;
            drawGradation();
            this.Refresh();
        }
        get
        {

            return this._gradationColor;
        }
    }

    public GradationSlider()
    {
        InitializeComponent();

        this.SetStyle(ControlStyles.ResizeRedraw, true);
        this.SetStyle(ControlStyles.DoubleBuffer, true);
        this.SetStyle(ControlStyles.UserPaint, true);
        this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);

        this.Resize += new System.EventHandler(this.CSlider_Resize);
        this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseMove);
        this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseDown);
        this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.CSlider_MouseUp);
        this.MouseLeave += new System.EventHandler(this.CSlider_MouseLeave);
        this.MouseEnter += new System.EventHandler(this.CSlider_MouseEnter);

        drawTick();
    }

    // 描画
    //針の描画
    private Bitmap tick;
    private void drawTick()
    {
        tick = new Bitmap(10, 10);

        Graphics g = Graphics.FromImage(tick);
        g.SmoothingMode = SmoothingMode.HighQuality;
        Point[] point = {   new Point(5,1), new Point(9,5),
                                new Point(9,7), new Point(8,8),
                                new Point(2,8), new Point(1,7),
                                new Point(1,5), new Point(5,1) };
        Brush b = new SolidBrush(Color.White);
        g.FillPolygon(b, point);
        Pen p = new Pen(Color.Black, 1);
        if (activeFlag == true)
        {
            p = new Pen(Color.Brown, 1);
        }
        g.DrawLines(p, point);
        g.Dispose();
    }

    protected override void OnPaint(PaintEventArgs pe)
    {
        base.OnPaint(pe);
        drawGradation();
        pe.Graphics.DrawImage(gradation, 5, 0, gradation.Width, gradation.Height);
        pe.Graphics.DrawImage(tick, (Value * gradation.Width) / (Maximum - Minimum), gradation.Height);

    }

    //グラデーションの描画
    private Bitmap gradation;
    private void drawGradation()
    {
        if (this.Width > 10 && this.Height > 10)
        {
            Size gradationSize = new Size(this.Width - 10, this.Height - 10);

            gradation = new Bitmap(gradationSize.Width, gradationSize.Height);
            Graphics g = Graphics.FromImage(gradation);
            LinearGradientBrush lgb =
                new LinearGradientBrush(new Rectangle(0, 0, gradationSize.Width, gradationSize.Height),
                    Color.Black, Color.White, LinearGradientMode.Horizontal);

            //多色用


            if (GradationColor != null && GradationColor.Length >= 2)
            {
                // ColorBlendクラスを生成 
                ColorBlend cb = new ColorBlend();
                cb.Colors = GradationColor;
                float[] Position = new float[GradationColor.Length];
                for (int i = 0; i < GradationColor.Length; i++)
                {
                    Position[i] = (1.0f / (GradationColor.Length - 1)) * (i);
                }

                cb.Positions = Position;
                // ブラシのInterpolationColorsに設定 
                lgb.InterpolationColors = cb;
            }


            g.FillRectangle(lgb, new Rectangle(0, 0, gradationSize.Width, gradationSize.Height));

            //枠線
            Pen p = new Pen(Color.Black, 1);
            if (activeFlag == true)
            {
                p = new Pen(Color.Brown, 1);
            }

            g.DrawRectangle(p, 0, 0, gradationSize.Width - 1, gradationSize.Height - 1);
            lgb.Dispose();
            g.Dispose();
        }

    }


    //リサイズ時、グラデーションの再描画
    private void CSlider_Resize(object sender, EventArgs e)
    {
        drawGradation();
        this.Refresh();
    }


    //プロパティ
    private bool mouseDown = false;
    private void CSlider_MouseDown(object sender, MouseEventArgs e)
    {
        Value = (int)(((float)(e.X - 5) / (this.Width - 10)) * (Maximum - Minimum));
        if (Value <= Minimum) Value = Minimum;
        if (Value >= Maximum) Value = Maximum;

        if (ValueChanged != null) ValueChanged(this, new EventArgs());

        mouseDown = true;
    }

    private void CSlider_MouseMove(object sender, MouseEventArgs e)
    {
        if (mouseDown == true)
        {
            Value = (int)(((float)(e.X - 5) / (this.Width - 10)) * (Maximum - Minimum));
            if (Value <= Minimum) Value = Minimum;
            if (Value >= Maximum) Value = Maximum;

            if (ValueChanged != null) ValueChanged(this, new EventArgs());
        }
    }

    private void CSlider_MouseUp(object sender, MouseEventArgs e)
    {
        mouseDown = false;
    }


    private bool activeFlag = false;
    private void CSlider_MouseEnter(object sender, EventArgs e)
    {
        activeFlag = true;

        drawGradation();
        drawTick();
        this.Refresh();
    }

    private void CSlider_MouseLeave(object sender, EventArgs e)
    {
        activeFlag = false;

        drawGradation();
        drawTick();
        this.Refresh();
    }
}