zedgraph基本教程篇第九节MasterSampleDemo.cs介绍

第九节MasterSampleDemo.cs介绍

           最近一直挺忙的，都没时间写博客了，好在这是基础篇的最后一篇了，我也可以歇歇了，关于其它的深入章节我会在以后的时间补上的。

先来看看这一节的示图和源代码吧。

using System;
using System.Drawing;
using System.Collections;
 
using ZedGraph;
 
namespace ZedGraph.Demo
{
     ///<summary>
     /// Summary description for SimpleDemo.
     ///</summary>
     public class MasterSampleDemo : DemoBase
     {
 
         public MasterSampleDemo() : base( "Code Project MasterPane Sample",
                  "MasterPane Sample", DemoType.Tutorial )
         {
              MasterPane myMaster = base.MasterPane;
 
              // Remove the default GraphPane that comes with ZedGraphControl
              myMaster.PaneList.Clear();
 
              // Set the masterpane title
              myMaster.Title = "ZedGraph MasterPane Example";
              myMaster.IsShowTitle = true;
 
              // Fill the masterpane background with a color gradient
              myMaster.PaneFill = new Fill( Color.White, Color.MediumSlateBlue, 45.0F );
 
              // Set the margins to 10 points
              myMaster.MarginAll = 10;
 
              // Enable the masterpane legend
              myMaster.Legend.IsVisible = true;
              myMaster.Legend.Position = LegendPos.TopCenter;
 
              // Add a priority stamp
              TextItem text = new TextItem( "Priority", 0.88F, 0.12F );
              text.Location.CoordinateFrame = CoordType.PaneFraction;
              text.FontSpec.Angle = 15.0F;
              text.FontSpec.FontColor = Color.Red;
              text.FontSpec.IsBold = true;
              text.FontSpec.Size = 15;
              text.FontSpec.Border.IsVisible = false;
              text.FontSpec.Border.Color = Color.Red;
              text.FontSpec.Fill.IsVisible = false;
              text.Location.AlignH = AlignH.Left;
              text.Location.AlignV = AlignV.Bottom;
              myMaster.GraphItemList.Add( text );
 
              // Add a draf watermarkè
              text = new TextItem( "DRAFT", 0.5F, 0.5F );
              text.Location.CoordinateFrame = CoordType.PaneFraction;
              text.FontSpec.Angle = 30.0F;
              text.FontSpec.FontColor = Color.FromArgb( 70, 255, 100, 100 );
              text.FontSpec.IsBold = true;
              text.FontSpec.Size = 100;
              text.FontSpec.Border.IsVisible = false;
              text.FontSpec.Fill.IsVisible = false;
              text.Location.AlignH = AlignH.Center;
              text.Location.AlignV = AlignV.Center;
              text.ZOrder = ZOrder.A_InFront;
              myMaster.GraphItemList.Add( text );
 
              // Initialize a color and symbol type rotator
              ColorSymbolRotator rotator = new ColorSymbolRotator();
 
              // Create some new GraphPanes
              for ( int j=0; j<5; j++ )
              {
                  // Create a new graph - rect dimensions do not matter here, since it
                  // will be resized by MasterPane.AutoPaneLayout()
                  GraphPane myPane = new GraphPane( new Rectangle( 10, 10, 10, 10 ),
                       "Case #" + (j+1).ToString(),
                       "Time, Days",
                       "Rate, m/s" );
 
                  // Fill the GraphPane background with a color gradient
                  myPane.PaneFill = new Fill( Color.White, Color.LightYellow, 45.0F );
                  myPane.BaseDimension = 6.0F;
 
                  // Make up some data arrays based on the Sine function
                  PointPairList list = new PointPairLis_u40 ?);
                  for ( int i=0; i<36; i++ )
                  {
                       double x = (double) i + 5;
                       double y = 3.0 * ( 1.5 + Math.Sin( (double) i * 0.2 + (double) j ) );
                       list.Add( x, y );
                  }
 
                  // Add a curve to the Graph, use the next sequential color and symbol
                  LineItem myCurve = myPane.AddCurve( "Type " + j.ToString(),
                       list, ro_u97 ?tor.NextColor, rotator.NextSymbol );
                  // Fill the symbols with white to make them opaque
                  myCurve.Symbol.Fill = new Fill( Color.White );
 
                  // Add the GraphPane to the MasterPane
                  myMaster.Add( myPane );
              }
 
              Graphics g = this.ZedGraphControl.CreateGraphics();
              // Tell ZedGraph to auto layout the new GraphPanes
              myMaster.AutoPaneLayout( g, PaneLayout.ExplicitRow32 );
              myMaster.AxisChange( g );
              g.Dispose();
         }
     }
}
     这一节主要是讲多pane的创建方法。里面大部分的方法和属性在以前的章节中已经介绍过了，这里只想讲三个地方：MasterPane类、ColorSymbolRotator类和ZOrder这个属性的用法。
     首先就是MasterPane类。这个类就是创建多pane的类，是一个GraphPane类的集合。它里面的大部分属性和方法都继承自PaneBase和Object。像.NET一样，这个类提供了Item和PaneList属性来设置和获取里面的成员。在程序中我们也看到了，其实MasterPane什么也没做，就是把其它的类一项项的Add进它的集合中。
           ColorSymbolRotator类就是一个为GraphPane.AddCurve方法循环提供不同颜色和符号的类。这个类的东西不多，我个人认为就相当于一个枚举一样，我们可以看到程序中只用到了rotator.NextColor rotator.NextSymbol这两个属性，来获取不同的颜色和符号。
     最后就是Zorder这个属性了，在前面的几节中我们也见过这个属性，可是当时我没有讲，现在我说说。Zorder就是图形在Z轴的位置。如果我们在平面上把左右看成X轴，把上下看成Y轴，那么内外就是Z轴了，也就是Zorder就是图形在内外的位置(这个内外是针对其它图形来说的)。我们可以看看示图中的DRAFT这个水印的效果，这就是Zorder的功能。如果你把程序中的
text.ZOrder = ZOrder.A_InFront;改成text.ZOrder = ZOrder.G_BehindAll;
那么DRAFT就是如下的效果了，DRAFT就在各个Pane的下面了。
Zorder是一个枚举共有七个枚举值。分别是G_BehindAll、F_BehindAxisFill、E_BehindAxis、D_BehindCurves、C_BehindAxisBorder、B_BehindLegend和A_InFront。具体的解释如
Member Name Description 
G_BehindAll Specifies that the GraphItem will be behind all other objects (including the PaneBaseTitle).  
F_BehindAxisFill Specifies that the GraphItem will be behind the AxisRect background Fill (see AxisFill).  
E_BehindAxis Specifies that the GraphItem will be behind the Axis objects.  
D_BehindCurves Specifies that the GraphItem will be behind the CurveItem objects.  
C_BehindAxisBorder Specifies that the GraphItem will be behind the Axis border.  
B_BehindLegend Specifies that the GraphItem will be behind the Legend object.  
A_InFront Specifies that the GraphItem will be in front of all other objects, except for the other GraphItem objects that have the same ZOrder and are before this object in the GraphItemList.  
Member Name Description   
G_BehindAll Specifies that the GraphItem will be behind all other objects (including the PaneBaseTitle).    
F_BehindAxisFill Specifies that the GraphItem will be behind the AxisRect background Fill (see AxisFill).    
E_BehindAxis Specifies that the GraphItem will be behind the Axis objects.    
D_BehindCurves Specifies that the GraphItem will be behind the CurveItem objects.    
C_BehindAxisBorder Specifies that the GraphItem will be behind the Axis border.    
B_BehindLegend Specifies that the GraphItem will be behind the Legend object.    
A_InFront Specifies that the GraphItem will be in front of all other objects, except for the other GraphItem objects that have the same ZOrder and are before this object in the GraphItemList.    
      



本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/tjvictor/archive/2006/12/15/1444299.aspx

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/tjvictor/archive/2006/12/15/1444299.aspx

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/tjvictor/archive/2006/12/15/1444299.aspx