VerticalLabel的简单实现

最新推荐文章于 2021-02-24 17:44:17 发布

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最新推荐文章于 2021-02-24 17:44:17 发布

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本文介绍了一种在Windows Forms应用程序中实现垂直显示文本标签的方法。通过自定义Label控件，文章详细展示了如何调整文本方向并控制其布局。此外，还提供了一个示例项目，展示如何使用属性网格来调整垂直标签的属性。

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一早收到CodeProject的订阅邮件，大概看了一下。里面有一个做VerticalLabel的例子，我没看，就想自己做一个试试。抛砖引玉！

using System;

using System.Drawing;

using System.Windows.Forms;

namespace Webb.Publics.WinForm

{

/**//// <summary>

/// Summary description for VerticalLabel.

/// </summary>

public class VerticalLabel : System.Windows.Forms.Label

{

private int _Span = 0;

public int TextSpan

{

get

{return this._Span;}

set

{

this._Span = value;

this.Refresh();

}

public VerticalLabel()

{

// TODO: Add constructor logic here

this.Width = 35;

this.Height = 100;

}

protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)

{

//base.OnPaint (e);

SizeF m_size = e.Graphics.MeasureString(this.Text,this.Font);

float m_SingleWidth = m_size.Width/this.Text.Length+2;

float m_SingleHeight = m_size.Height;

float m_TotalWidth = m_SingleWidth;

float m_TotalHeight = m_size.Height*this.Text.Length;

//int i = 0;

PointF m_Offset = this.MeasurePosition(m_TotalWidth,m_TotalHeight);

for(int i = 0;i<this.Text.Length;i++)

{

RectangleF m_Rec = new RectangleF(m_Offset.X,m_Offset.Y+(m_SingleHeight+this.TextSpan)*i,m_SingleWidth,m_SingleHeight);

e.Graphics.DrawString(this.Text.Substring(i,1),this.Font,new SolidBrush(this.ForeColor),m_Rec);

}

private PointF MeasurePosition(float i_TotalWidth,float i_TotalHeight)

{

PointF m_Result;

switch(this.TextAlign)

{

//Bottom

case ContentAlignment.BottomCenter:

m_Result = new PointF((this.Width-i_TotalWidth)/2,this.Height-i_TotalHeight);

break;

case ContentAlignment.BottomLeft:

m_Result = new PointF(0,this.Height-i_TotalHeight);

break;

case ContentAlignment.BottomRight:

m_Result = new PointF(this.Width-i_TotalWidth,this.Height-i_TotalHeight);

break;

//Middle

case ContentAlignment.MiddleCenter:

m_Result = new PointF((this.Width-i_TotalWidth)/2,(this.Height-i_TotalHeight)/2);

break;

case ContentAlignment.MiddleLeft:

m_Result = new PointF(0,(this.Height-i_TotalHeight)/2);

break;

case ContentAlignment.MiddleRight:

m_Result = new PointF(this.Width-i_TotalWidth,(this.Height-i_TotalHeight)/2);

break;

//Top

case ContentAlignment.TopCenter:

m_Result = new PointF((this.Width-i_TotalWidth)/2,0);

break;

default:

case ContentAlignment.TopLeft:

m_Result = new PointF(0,0);

break;

case ContentAlignment.TopRight:

m_Result = new PointF(this.Width-i_TotalWidth,0);

break;

}

return m_Result;

}

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

namespace WindowsApplication1

{

/**//// <summary>

/// Summary description for Form5.

/// </summary>

public class Form5 : System.Windows.Forms.Form

{

private System.Windows.Forms.PropertyGrid propertyGrid1;

private Webb.Publics.WinForm.VerticalLabel verticalLabel2;

/**//// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.Container components = null;

public Form5()

{

// Required for Windows Form Designer support

InitializeComponent();

// TODO: Add any constructor code after InitializeComponent call

}

/**//// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if(components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

Windows Form Designer generated code#region Windows Form Designer generated code

/**//// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.propertyGrid1 = new System.Windows.Forms.PropertyGrid();

this.verticalLabel2 = new Webb.Publics.WinForm.VerticalLabel();

this.SuspendLayout();

// propertyGrid1

this.propertyGrid1.CommandsVisibleIfAvailable = true;

this.propertyGrid1.Dock = System.Windows.Forms.DockStyle.Right;

this.propertyGrid1.LargeButtons = false;

this.propertyGrid1.LineColor = System.Drawing.SystemColors.ScrollBar;

this.propertyGrid1.Location = new System.Drawing.Point(304, 0);

this.propertyGrid1.Name = "propertyGrid1";

this.propertyGrid1.PropertySort = System.Windows.Forms.PropertySort.Alphabetical;

this.propertyGrid1.SelectedObject = this.verticalLabel2;

this.propertyGrid1.Size = new System.Drawing.Size(272, 269);

this.propertyGrid1.TabIndex = 1;

this.propertyGrid1.Text = "propertyGrid1";

this.propertyGrid1.ViewBackColor = System.Drawing.SystemColors.Window;

this.propertyGrid1.ViewForeColor = System.Drawing.SystemColors.WindowText;

// verticalLabel2

this.verticalLabel2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;

this.verticalLabel2.Location = new System.Drawing.Point(8, 8);

this.verticalLabel2.Name = "verticalLabel2";

this.verticalLabel2.Size = new System.Drawing.Size(288, 256);

this.verticalLabel2.TabIndex = 3;

this.verticalLabel2.Text = "这是一个测试";

this.verticalLabel2.TextSpan = 0;

// Form5

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(576, 269);

this.Controls.Add(this.verticalLabel2);

this.Controls.Add(this.propertyGrid1);

this.Name = "Form5";

this.Text = "Form5";

this.Load += new System.EventHandler(this.Form5_Load);

this.ResumeLayout(false);

}

#endregion

private void Form5_Load(object sender, System.EventArgs e)

{

}