form1.h

《VC++2005编程实例》第二章的源代码

#pragma once


namespace Example {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Form1 摘要
	///
	/// 警告: 如果更改此类的名称，则需要更改
	///          与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
	///          “资源文件名”属性。否则，
	///          设计器将不能与此窗体的关联
	///          本地化资源正确交互。
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
			//
			//TODO: 在此处添加构造函数代码
			//
		}

	protected:
		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}

	private:
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要
		/// 使用代码编辑器修改此方法的内容。
		/// </summary>
		void InitializeComponent(void)
		{
			this->SuspendLayout();
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->BackColor = System::Drawing::SystemColors::ControlLightLight;
			this->ClientSize = System::Drawing::Size(390, 214);
			this->Name = L"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = L"演示绘制不规则连接线";
			this->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::Form1_MouseUp);
			this->MouseMove += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::Form1_MouseMove);
			this->MouseDown += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::Form1_MouseDown);
			this->ResumeLayout(false);

		}
#pragma endregion
	public: Point MyPoint1,MyPoint2;
	public: static int MyFlag=0;
//记录连接线第二个坐标点并根据标志确定是否绘制连接线
	private: System::Void Form1_MouseMove(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
   Graphics^ g;
   Pen^ MyPen;
   MyPen=gcnew Pen(Color::Black);
   if(this->MyFlag==0)
        return;
   this->MyPoint2.X=e->X;
   this->MyPoint2.Y=e->Y;
   g=this->CreateGraphics();
   //绘制直线
   g->DrawLine(MyPen,MyPoint1.X,MyPoint1.Y,MyPoint2.X,MyPoint2.Y);
   MyPoint1.X=MyPoint2.X;
   MyPoint1.Y=MyPoint2.Y;
			 }
   //表示可以绘制连接线
	private: System::Void Form1_MouseUp(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
	    this->MyFlag = 0;
			 }
 //记录连接线第一个坐标点
	private: System::Void Form1_MouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
	    this->MyFlag=1;
   this->MyPoint1.X=e->X;
   this->MyPoint2.Y=e->Y;
			 }
	};
}