基本教程篇----第九节MasterSampleDemo.cs介绍

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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 watermark è

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 PaneBase Title).
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 PaneBase Title).
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.