/*★ Direct 3D で Form を表示    前田 稔 ★*/
#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>
#using <Microsoft.DirectX.dll>
#using <Microsoft.DirectX.Direct3D.dll>
#using <Microsoft.DirectX.Direct3DX.dll>

using namespace System;
using namespace System::Windows::Forms;
using namespace System::Drawing;
using namespace Microsoft::DirectX;
using namespace Microsoft::DirectX::Direct3D;

ref class CreateDevice : public System::Windows::Forms::Form
{
    Microsoft::DirectX::Direct3D::Device  ^device;

  public:
    // Constructor
    CreateDevice()
    {
        device = nullptr;
        // Window のサイズを設定
        this->ClientSize = System::Drawing::Size(400,300);
        // caption の設定
        this->Text = "D3D CreateDevice";
    }

    bool InitializeGraphics()
    {
        PresentParameters ^presentParams = gcnew PresentParameters();
        presentParams->Windowed=true;
        presentParams->SwapEffect = SwapEffect::Discard;
        device = gcnew Device(0, DeviceType::Hardware, this, CreateFlags::SoftwareVertexProcessing, presentParams);
        if (device!=nullptr)    return true;
        MessageBox::Show("Create Direct3D Device Error.");
        return false; 
    }

  public:
    // OnPaint() から呼ばれる描画処理
    void Render()
    {
        if (device==nullptr)    return;

        //Clear the backbuffer to a blue color 
        device->Clear(ClearFlags::Target, System::Drawing::Color::Blue, 1.0f, 0);
        //Begin the scene
        device->BeginScene();

        // Rendering of scene objects can happen here

        //End the scene
        device->EndScene();
        device->Present();
    }

    // Window の描画 OnPaint() を override
    virtual void OnPaint(PaintEventArgs ^e) override
    {
        this->Render();    // Render on painting
    }

    // OnKeyPress() を override
    virtual void OnKeyPress(System::Windows::Forms::KeyPressEventArgs ^e) override
    {
        if ((int)e->KeyChar == (int)System::Windows::Forms::Keys::Escape)
            this->Close();  // Esc was pressed
    }

};

//☆ Main() メソッド
int main()
{
    CreateDevice ^frm;
    frm = gcnew CreateDevice();
    if (frm)
    {
        if (!frm->InitializeGraphics())
        {
            MessageBox::Show("Could not initialize Direct3D.");
            return 0;
        }
        frm->Show();

        // メッセージループ
        while(frm->Created)
        {
            frm->Render();
            Application::DoEvents();
        }
    }
    return 0;
}