form1.h

实例112 如何旋转显示图片实例113 如何分块显示图片实例114 如何缩放显示图片实例115 如何投射显示图片

#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: 如果您更改该类的名称，则需要更改 
	///          与该类所依赖的所有 .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关联的
	///          本地化资源正确交互。
	/// </summary>
	public __gc class Form1 : public System::Windows::Forms::Form
	{	
	public:
		Form1(void)
		{
			InitializeComponent();
		}
  
	protected:
		void Dispose(Boolean disposing)
		{
			if (disposing && components)
			{
				components->Dispose();
			}
			__super::Dispose(disposing);
		}
	private: System::Windows::Forms::PictureBox *  pictureBox1;
	private: System::Windows::Forms::Button *  button1;
	private: System::Windows::Forms::Button *  button2;
	private: System::Windows::Forms::OpenFileDialog *  openFileDialog1;

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

		/// <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)
		{
			System::Resources::ResourceManager *  resources = new System::Resources::ResourceManager(__typeof(Example::Form1));
			this->pictureBox1 = new System::Windows::Forms::PictureBox();
			this->button1 = new System::Windows::Forms::Button();
			this->button2 = new System::Windows::Forms::Button();
			this->openFileDialog1 = new System::Windows::Forms::OpenFileDialog();
			this->SuspendLayout();
			// 
			// pictureBox1
			// 
			this->pictureBox1->BorderStyle = System::Windows::Forms::BorderStyle::Fixed3D;
			this->pictureBox1->Image = (__try_cast<System::Drawing::Image *  >(resources->GetObject(S"pictureBox1.Image")));
			this->pictureBox1->Location = System::Drawing::Point(0, 0);
			this->pictureBox1->Name = S"pictureBox1";
			this->pictureBox1->Size = System::Drawing::Size(352, 184);
			this->pictureBox1->TabIndex = 0;
			this->pictureBox1->TabStop = false;
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(48, 188);
			this->button1->Name = S"button1";
			this->button1->Size = System::Drawing::Size(96, 23);
			this->button1->TabIndex = 1;
			this->button1->Text = S"浏览图像";
			this->button1->Click += new System::EventHandler(this, button1_Click);
			// 
			// button2
			// 
			this->button2->Location = System::Drawing::Point(192, 188);
			this->button2->Name = S"button2";
			this->button2->Size = System::Drawing::Size(96, 23);
			this->button2->TabIndex = 2;
			this->button2->Text = S"旋转图片";
			this->button2->Click += new System::EventHandler(this, button2_Click);
			// 
			// openFileDialog1
			// 
			this->openFileDialog1->Filter = S"Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|" 
				S" JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b" 
				S"mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f" 
				S"iles (*.*)|*.*";
			// 
			// Form1
			// 
			this->AutoScaleBaseSize = System::Drawing::Size(6, 14);
			this->ClientSize = System::Drawing::Size(344, 214);
			this->Controls->Add(this->button2);
			this->Controls->Add(this->button1);
			this->Controls->Add(this->pictureBox1);
			this->MaximizeBox = false;
			this->Name = S"Form1";
			this->StartPosition = System::Windows::Forms::FormStartPosition::CenterScreen;
			this->Text = S"演示旋转显示图片";
			this->ResumeLayout(false);

		}	
	private: System::Void button2_Click(System::Object *  sender, System::EventArgs *  e)
			 {//旋转图片
				 Graphics* g=this->pictureBox1->CreateGraphics();
				 g->Clear(Color::White);
                 //装入图片
				 Bitmap* MyImage=(Bitmap*)this->pictureBox1->Image;           	 
				//获取当前窗口的中心点
				 Rectangle MyRect=Rectangle(0,0,this->pictureBox1->get_Width(),this->pictureBox1->get_Height());
				 PointF MyCenter=PointF(MyRect.Width/2,MyRect.Height/2);
				float MyOffsetX=0;
				float MyOffsetY=0;
				MyOffsetX=MyCenter.X-MyImage->get_Width()/2;
				MyOffsetY=MyCenter.Y-MyImage->get_Height()/2;
				//构造图片显示区域:让图片的中心点与窗口的中心点一致
				RectangleF MyPicRect=RectangleF(MyOffsetX,MyOffsetY,MyImage->get_Width(),MyImage->get_Height());
				PointF MyPointCenter=PointF(MyPicRect.X+MyPicRect.get_Width()/2,MyPicRect.Y+MyPicRect.get_Height()/2);
				//让图片绕中心旋转一周
				for(int iAngle=0; iAngle<361; iAngle+=1)
				{
					//g->Clear(Color::White);
					// 绘图平面以图片的中心点旋转
					g->TranslateTransform(MyPointCenter.X,MyPointCenter.Y);
					g->RotateTransform( iAngle);
					//恢复绘图平面在水平和垂直方向的平移
					g->TranslateTransform(-MyPointCenter.X,-MyPointCenter.Y);
					//绘制图片并延时
					g->DrawImage(MyImage,MyPicRect);
					System::Threading::Thread::Sleep(5);
					//重置绘图平面的所有变换
					g->ResetTransform();
				}
			
			 }	
	private: System::Void button1_Click(System::Object *  sender, System::EventArgs *  e)
			 {//浏览图像
				if(this->openFileDialog1->ShowDialog()==DialogResult::OK)
				{

					Image* MyImage=System::Drawing::Image::FromFile(this->openFileDialog1->FileName);
					this->pictureBox1->Image=MyImage;
				}
			 }

	};
}