//MyForm.h

#pragma once

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

namespace MyProject {

    public ref class MyForm : public System::Windows::Forms::Form
    {
      public:
        MyForm(void)
        { 
          InitializeComponent();
          this->DoubleBuffered=true; 
          pMouse = gcnew array<PointF>(1);  
          mat=gcnew Matrix();
        }

      protected:

        ~MyForm()
        { 
          if(components) delete components;
          delete g;
        }

      private:

        System::ComponentModel::Container ^components;
      private: System::Windows::Forms::Label^  label1;

        Graphics ^g;
        System::Drawing::Drawing2D::Matrix ^mat;
        array<PointF> ^pMouse;

#pragma region Windows Form Designer generated code

        void InitializeComponent(void)
        {
          this->label1 = (gcnew System::Windows::Forms::Label());
          this->SuspendLayout();
          // 
          // label1
          // 
          this->label1->AutoSize = true;
          this->label1->Location = System::Drawing::Point(15, 10);
          this->label1->Name = L"label1";
          this->label1->Size = System::Drawing::Size(35, 13);
          this->label1->TabIndex = 0;
          this->label1->Text = L"label1";
          // 
          // MyForm
          // 
          this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
          this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
          this->ClientSize = System::Drawing::Size(200, 200);
          this->Controls->Add(this->label1);
          this->Name = L"MyForm";
          this->Text = L"MyForm";
          this->Load += gcnew System::EventHandler(this, &MyForm::MyForm_Load);
          this->Paint += gcnew System::Windows::Forms::PaintEventHandler(this, &MyForm::MyForm_Paint);
          this->Resize += gcnew System::EventHandler(this, &MyForm::MyForm_Resize);
          this->MouseMove += gcnew System::Windows::Forms::MouseEventHandler(this, &MyForm::MyForm_MouseMove);
          this->ResumeLayout(false);
          this->PerformLayout();
        }
#pragma endregion

      private: System::Void MyForm_Load(System::Object^ sender, System::EventArgs^ e)
      {  
        mat->Scale(0.5f, -0.5f);
        mat->Translate(10.0f, -100.0f);
        g = this->CreateGraphics();
        g->PageUnit=GraphicsUnit::Pixel;		
        g->Transform=mat;
      }
      private: System::Void MyForm_Paint(System::Object^ sender, System::Windows::Forms::PaintEventArgs^ e)
      {         
        g->Clear(Color::LightBlue);
        // Draw ...
      }
      private: System::Void MyForm_Resize(System::Object^ sender, System::EventArgs^ e)
      { 
        g->ResetClip();
        g->SetClip(this->ClientRectangle);     
      }
      private: System::Void MyForm_MouseMove(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e)
      {
        pMouse[0].X=(float)e->X;
        pMouse[0].Y=(float)e->Y;
        g->TransformPoints(CoordinateSpace::World, CoordinateSpace::Device, pMouse);
        label1->Text="X, Y = "+pMouse[0].X.ToString("0.00")+", "+pMouse[0].Y.ToString("0.00"); //show world coordinate
      }
    };
}