NeoFT/Controls/ImageButton.cs

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Diagnostics;
using System.Windows.Forms;

namespace nft.controls
{
        public enum ButtonStateImage :int{ Normal, Hover, Pressed, Disabled };
        /// <summary>
        /// ImageButton の概要の説明です。
        /// </summary>
        public class ImageButton : System.Windows.Forms.UserControl
        {
                const int ButtonStateCounts = 4;
                /// <summary>
                /// 必要なデザイナ変数です。
                /// </summary>
                protected ImageList imgList;
        protected Bitmap bmpStrip;
        protected Color colTransKey;
        private ImageList imgListInternal;
                protected bool imgListDispose = false;
                protected readonly short[] stateIndices = new short[4];

                public ImageButton(){
                        this.Size = new Size(16,16);
            this.BackColor = Color.Transparent;
                }
        
                public ImageList ImageList { 
                        get{ return imgList; } 
                        set{
                if (imgList != value){
                    if (imgListInternal != null && imgListInternal != imgList) {
                        imgListInternal.Dispose();
                    }
                    imgList = value;
                    imgListInternal = imgList;
                    colTransKey = imgList.TransparentColor;
                }
                        }
                }

        public Bitmap StripSource {
            get { return bmpStrip; }
            set {
                if (bmpStrip != value) {
                    if (imgListInternal != null && imgListInternal != imgList) {
                        imgListInternal.Dispose();
                    }
                    bmpStrip = value;
                    if (value != null) {
                        imgListInternal = new ImageList();
                        int w = bmpStrip.Width >> 2;
                        imgListInternal.ImageSize = new Size(w, bmpStrip.Height);
                        imgListInternal.Images.AddStrip(bmpStrip);
                        imgListInternal.TransparentColor = colTransKey;
                    }
                    imgList = null;
                }
            }
        }

        public Color TransparentKey {
            get {
                if (imgListInternal != null) {
                    return imgListInternal.TransparentColor;
                } else {
                    return colTransKey;
                }
            }
            set {
                this.colTransKey = value;
                if (imgListInternal != null) {
                    imgListInternal.TransparentColor = colTransKey;
                }
            }                
        }

                public bool DisposeImageList {
                        get{ return imgListDispose; }
                        set{ imgListDispose = value; }
                }

                public void SetModeImageIndices(int normal, int hover, int press, int disable) {
                        stateIndices[(int)ButtonStateImage.Normal] = (short)normal;
                        stateIndices[(int)ButtonStateImage.Hover] = (short)hover;
                        stateIndices[(int)ButtonStateImage.Pressed] = (short)press;
                        stateIndices[(int)ButtonStateImage.Disabled] = (short)disable;
                }

                public int IdxNormalImage { 
                        get { return stateIndices[(int)ButtonStateImage.Normal]; }
                        set { stateIndices[(int)ButtonStateImage.Normal]=(short)value; }
                }
                public int IdxHoverImage { 
                        get { return stateIndices[(int)ButtonStateImage.Hover]; }
                        set { stateIndices[(int)ButtonStateImage.Hover]=(short)value; }
                }
                public int IdxPressedImage { 
                        get { return stateIndices[(int)ButtonStateImage.Pressed]; }
                        set { stateIndices[(int)ButtonStateImage.Pressed]=(short)value; }
                }
                public int IdxDisabledImage { 
                        get { return stateIndices[(int)ButtonStateImage.Disabled]; }
                        set { stateIndices[(int)ButtonStateImage.Disabled]=(short)value; }
                }

                public Image GetImage(ButtonStateImage state){
                        try {
                return imgListInternal.Images[stateIndices[(int)state]];
                        }catch{
                                return SystemIcons.Error.ToBitmap();
                        }
                }

        protected override void OnLoad(EventArgs e) {
            base.OnLoad(e);
        }

                /// <summary>
                /// 使用されているリソースに後処理を実行します。
                /// </summary>
                protected override void Dispose( bool disposing )
                {
                        base.Dispose( disposing );
            if (imgListDispose && imgListInternal != null)
                imgListInternal.Dispose();
                }
                
                protected override void OnPaint(PaintEventArgs e) {
                        base.OnPaint (e);
                        Graphics g = e.Graphics;
                        ButtonStateImage bs = ButtonStateImage.Normal;
                        
                        if(Enabled){
                                Point mp = PointToClient(MousePosition);
                                if(mp.X>=0 && mp.X<Width && mp.Y>=0 && mp.Y<Height){
                                        if(Control.MouseButtons==MouseButtons.Left)
                                                bs = ButtonStateImage.Pressed;
                                        else
                                                bs = ButtonStateImage.Hover;
                                }                               
                        } else
                                bs = ButtonStateImage.Disabled;
                        g.DrawImage(GetImage(bs),0,0,Width,Height);
                }
      
                protected override void OnMouseEnter(EventArgs e) {
            base.OnMouseEnter(e);
            Invalidate();
        }

                protected override void OnMouseLeave(EventArgs e) {
            base.OnMouseLeave(e);
            Invalidate();
        }

                protected override void OnMouseDown(MouseEventArgs e) {
            base.OnMouseDown(e);
            if (e.Button == MouseButtons.Left)
                Invalidate();
        }

                protected override void OnMouseUp(MouseEventArgs e) {
            base.OnMouseUp(e);
            if (e.Button == MouseButtons.Left)
                Invalidate();
        }
        

        }
}