DrawingLine3_MyForm.h

#pragma once

namespace DrawingLine3
{

    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>
    /// MyForm 的摘要
    /// </summary>
    public ref class MyForm : public System::Windows::Forms::Form
    {
    public:
        MyForm(void)
        {
            InitializeComponent();
            //
            //TODO:  在此加入建構函式程式碼
            //
        }

    protected:
        /// <summary>
        /// 清除任何使用中的資源。
        /// </summary>
        ~MyForm()
        {
            if (components)
            {
                delete components;
            }
        }
    private: System::Windows::Forms::Button^  button1;
    protected:

    private:
        /// <summary>
        /// 設計工具所需的變數。
        /// </summary>
        System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
        /// <summary>
        /// 此為設計工具支援所需的方法 - 請勿使用程式碼編輯器修改
        /// 這個方法的內容。
        /// </summary>
        void InitializeComponent(void)
        {
            this->button1 = (gcnew System::Windows::Forms::Button());
            this->SuspendLayout();
            //
            // button1
            //
            this->button1->Location = System::Drawing::Point(197, 226);
            this->button1->Name = L"button1";
            this->button1->Size = System::Drawing::Size(75, 23);
            this->button1->TabIndex = 0;
            this->button1->Text = L"button1";
            this->button1->UseVisualStyleBackColor = true;
            this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
            //
            // MyForm
            //
            this->AutoScaleDimensions = System::Drawing::SizeF(6, 12);
            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
            this->ClientSize = System::Drawing::Size(284, 261);
            this->Controls->Add(this->button1);
            this->Name = L"MyForm";
            this->Text = L"MyForm";
            this->ResumeLayout(false);

        }
#pragma endregion
    private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e)
    {
        Graphics^ G = this->CreateGraphics();
        int Idx = 0;

        //for (Idx = 1; Idx <= 100; Idx += 3)
        //{
        //  G->DrawLine(Pens::White, 0, Idx, 200, Idx);
        //  G->DrawLine(Pens::Gray, 0, Idx + 1, 200, Idx + 1);
        //  G->DrawLine(Pens::Black, 0, Idx + 2, 200, Idx + 2);
        //}

        G->DrawLine(gcnew Pen(Brushes::Red, 7), 30, 1, 10, 100);
        G->DrawLine(gcnew Pen(Brushes::Orange, 6), 27, 1, 20, 100);
        G->DrawLine(gcnew Pen(Brushes::Yellow, 5), 24, 1, 30, 100);
        G->DrawLine(gcnew Pen(Brushes::Green, 4), 21, 1, 40, 100);
        G->DrawLine(gcnew Pen(Brushes::Blue, 3), 18, 1, 50, 100);
        G->DrawLine(gcnew Pen(Brushes::Indigo, 2), 15, 1, 60, 100);
        G->DrawLine(Pens::Purple, 12, 1, 70, 100);
        G->DrawLine(Pens::Black, 9, 1, 80, 100);
        G->DrawLine(Pens::Gray, 6, 1, 90, 100);
        G->DrawLine(Pens::White, 3, 1, 100, 100);
    }
    };
}