stackbargraph3d.cs

C#自定义查询控件

// Disclaimer and Copyright Information
// StackBarGraph3D.cs : 
//
// All rights reserved.
//
// Written by Pardesi Services, LLC
// Version 1.01
//
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///////////////////////////////////////////////////////////////////////////////
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using System;
using System.Diagnostics;
using System.Drawing;
using System.Collections;

namespace CommonComponent.CommonChart
{
	/// <summary>
	/// 
	/// </summary>
	public class StackBarGraph3D : CommonChart.BarGraph3D
	{
		public StackBarGraph3D()
		{
			this.m_GraphType = Type.StackBarGraph3D;
			this.m_QuadrantToShow = QuadrantType.Quad1;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <returns></returns>
		override protected bool DrawData()
		{
			//TODO: For now we will process only first array of data list. Later
			//		on implementation needs to take into account that there may
			//		be more than one list.
			ArrayList dataList = (ArrayList)this.m_obIslandList[0];
			if (null == dataList || dataList.Count == 0)
			{
				throw new Exception("There is no data list present in the array.");
			}

			int nCount = dataList.Count;
			CalculateBarWidth(nCount);

			CalculateBarHeightScale();

			if (this.UseRandomColors)
			{
				ColorUtil.GenerateRandomColors(nCount, out m_arrColors);
			}
			else
			{
				ColorUtil.GenerateColorValues(this.Colors, out m_arrColors);
			}

			int nStartX = (int)(this.m_ChartAxis.Origin.X + m_fIslandSpacing/2.0F);

			PointF pt = new PointF();
			double dThickness = this.m_iYAxisSpan * 0.05;

			int nHeight = 0;
			int nWidth = 0;
			for (int nIdx = 0; nIdx < this.m_obDataIslandNodes.Count; nIdx++)
			{
				ArrayList obIslandDataList = (ArrayList)this.m_obIslandList[nIdx];
				nCount = obIslandDataList.Count;
				pt.Y = this.m_ChartAxis.Origin.Y;
				pt.X = (int)(nStartX + nIdx*(this.m_fIslandWidth + this.m_fIslandSpacing));
				for (int i = 0; i < nCount; i++)
				{
					Color fillColor = (Color)this.m_arrColors[i];
					SolidBrush obBrush = new SolidBrush(fillColor);
					GraphDataObject obData = (GraphDataObject)obIslandDataList[i];
					if (null != obData)
					{
						// First draw the front rectangle.
						nHeight = (int)(obData.Y * this.m_dBarHeightScale);
						nWidth = (int)this.m_dDrawBarWidth;

						pt.Y -= nHeight;
						this.DrawBar(this.m_obGraphics, (int)pt.X, (int)pt.Y, nWidth, nHeight, dThickness, fillColor);
					}
					obBrush.Dispose();
				}
			}
			return true;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="barCount"></param>
		/// <returns></returns>
		override protected bool CalculateBarWidth(int barCount)
		{
			// Now we need to calculate data about islands.
			CalculateIslandDrawData();

			m_dDrawBarWidth = m_dEqualBarWidth = this.m_fIslandDrawWidth;
			// TODO: Provide attribuye to set the spacing between bars.
			//		 For now its fixed to about 85% of the width.
			m_dDrawBarWidth *= 0.85;
			return true;
		}
	}
}