76 lines
2.0 KiB
C#
76 lines
2.0 KiB
C#
using System;
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using System.ComponentModel.Design;
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using System.Drawing.Design;
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using System.ComponentModel;
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using System.Windows.Forms.ComponentModel;
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using System.Windows.Forms.Design;
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namespace DevComponents.Tree
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{
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/// <summary>
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/// Represents the class used by windows forms editor for picking an image from image list.
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/// </summary>
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public class ImageIndexEditor:UITypeEditor
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{
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private ImageEditor m_ImageEditor;
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private System.Windows.Forms.ImageList m_ImageList=null;
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public ImageIndexEditor():base()
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{
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m_ImageEditor=System.ComponentModel.TypeDescriptor.GetEditor(typeof(System.Drawing.Image),typeof(UITypeEditor)) as ImageEditor;
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}
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public override bool GetPaintValueSupported(ITypeDescriptorContext context)
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{
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return true;
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}
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public override void PaintValue(PaintValueEventArgs e)
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{
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try
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{
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if(e==null || e.Value==null)
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return;
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int iIndex=(int)e.Value;
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System.Drawing.Image img=this.GetImage(e.Context,iIndex);
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if(img==null)
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return;
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PaintValueEventArgs pi=new PaintValueEventArgs(e.Context,img,e.Graphics,e.Bounds);
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m_ImageEditor.PaintValue(pi);
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//m_ImageEditor.PaintValue(img,e.Graphics,e.Bounds);
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}
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catch{}
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}
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private System.Drawing.Image GetImage(System.ComponentModel.ITypeDescriptorContext context,int index)
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{
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if(m_ImageList!=null && index>=0 && index<=m_ImageList.Images.Count)
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{
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return m_ImageList.Images[index];
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}
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if(context==null)
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return null;
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object o=context.Instance;
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if(o==null)
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return null;
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System.ComponentModel.PropertyDescriptorCollection pd=System.ComponentModel.TypeDescriptor.GetProperties(o);
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if(pd==null)
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return null;
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foreach(System.ComponentModel.PropertyDescriptor prop in pd)
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{
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if(prop.PropertyType==typeof(System.Windows.Forms.ImageList))
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{
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m_ImageList=prop.GetValue(o) as System.Windows.Forms.ImageList;
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if(m_ImageList!=null && index>=0 && index<=m_ImageList.Images.Count)
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{
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return m_ImageList.Images[index];
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}
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break;
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}
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}
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return null;
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}
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}
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}
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