Grafikprogrammierung

#pragma once



namespace cpbs13_6 {



    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>

    /// Zusammenfassung für Form1

    /// </summary>

    public ref class Form1 : public System::Windows::Forms::Form

    {

    public:

        Form1(void)

        {

            InitializeComponent();

            //

            //TODO: Konstruktorcode hier hinzufügen.

            //

        }



    protected:

        /// <summary>

        /// Verwendete Ressourcen bereinigen.

        /// </summary>

        ~Form1()

        {

            if (components)

            {

                delete components;

            }

        }



    private:

        Graphics ^zeichenflaeche;

        Color linienFarbe;

        Color hintergrundFarbe;



        //für die Linienstile

        static array <Drawing2D::DashStyle> ^linienstil = {Drawing2D::DashStyle::Dash,

            Drawing2D::DashStyle::DashDot,

            Drawing2D::DashStyle::DashDotDot,

            Drawing2D::DashStyle::Dot,

            Drawing2D::DashStyle::Solid};



        //für die Hintergrundmuster

        static array <Drawing2D::HatchStyle> ^fuellstil = {Drawing2D::HatchStyle::BackwardDiagonal,

            Drawing2D::HatchStyle::Cross,

            Drawing2D::HatchStyle::DottedGrid,

            Drawing2D::HatchStyle::ForwardDiagonal,

            Drawing2D::HatchStyle::Sphere,

            Drawing2D::HatchStyle::Vertical,

            Drawing2D::HatchStyle::Wave,

            Drawing2D::HatchStyle::ZigZag};







    private: System::Windows::Forms::Panel^  panel1;

    private: System::Windows::Forms::GroupBox^  groupBox1;

    private: System::Windows::Forms::Label^  label3;

    private: System::Windows::Forms::Label^  label2;

    private: System::Windows::Forms::Label^  label1;

    private: System::Windows::Forms::NumericUpDown^  numericUpDownLinieStaerke;

    private: System::Windows::Forms::ListBox^  listBoxLinieStil;

    private: System::Windows::Forms::GroupBox^  groupBox2;

    private: System::Windows::Forms::Label^  label5;

    private: System::Windows::Forms::Label^  label4;

    private: System::Windows::Forms::ListBox^  listBoxHintergrundMuster;

    private: System::Windows::Forms::RadioButton^  radioButtonHintergrundMuster;

    private: System::Windows::Forms::RadioButton^  radioButtonHintergrundFarbe;

    private: System::Windows::Forms::RadioButton^  radioButtonHintergrundOhne;

    private: System::Windows::Forms::GroupBox^  groupBox3;

    private: System::Windows::Forms::RadioButton^  radioButtonLinie;

    private: System::Windows::Forms::RadioButton^  radioButtonRechteck;

    private: System::Windows::Forms::RadioButton^  radioButtonKreis;

    private: System::Windows::Forms::Button^  buttonStart;

    private: System::Windows::Forms::Button^  buttonLoeschen;

    private: System::Windows::Forms::Button^  buttonBeenden;

    private: System::Windows::Forms::TrackBar^  trackBar1;

    private: System::Windows::Forms::Panel^  panelLinieFarbeVorschau;

    private: System::Windows::Forms::Button^  buttonLinieFarbe;

    private: System::Windows::Forms::ColorDialog^  colorDialog1;

    private: System::Windows::Forms::Panel^  panelHintergrundFarbeVorschau;

    private: System::Windows::Forms::Button^  buttonHintergrundFarbe;



    private:

        /// <summary>

        /// Erforderliche Designervariable.

        /// </summary>

        System::ComponentModel::Container ^components;



#pragma region Windows Form Designer generated code

        /// <summary>

        /// Erforderliche Methode für die Designerunterstützung.

        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.

        /// </summary>

        void InitializeComponent(void)

        {

            this->panel1 = (gcnew System::Windows::Forms::Panel());

            this->groupBox1 = (gcnew System::Windows::Forms::GroupBox());

            this->panelLinieFarbeVorschau = (gcnew System::Windows::Forms::Panel());

            this->buttonLinieFarbe = (gcnew System::Windows::Forms::Button());

            this->label3 = (gcnew System::Windows::Forms::Label());

            this->label2 = (gcnew System::Windows::Forms::Label());

            this->label1 = (gcnew System::Windows::Forms::Label());

            this->numericUpDownLinieStaerke = (gcnew System::Windows::Forms::NumericUpDown());

            this->listBoxLinieStil = (gcnew System::Windows::Forms::ListBox());

            this->groupBox2 = (gcnew System::Windows::Forms::GroupBox());

            this->panelHintergrundFarbeVorschau = (gcnew System::Windows::Forms::Panel());

            this->label5 = (gcnew System::Windows::Forms::Label());

            this->buttonHintergrundFarbe = (gcnew System::Windows::Forms::Button());

            this->label4 = (gcnew System::Windows::Forms::Label());

            this->listBoxHintergrundMuster = (gcnew System::Windows::Forms::ListBox());

            this->radioButtonHintergrundMuster = (gcnew System::Windows::Forms::RadioButton());

            this->radioButtonHintergrundFarbe = (gcnew System::Windows::Forms::RadioButton());

            this->radioButtonHintergrundOhne = (gcnew System::Windows::Forms::RadioButton());

            this->groupBox3 = (gcnew System::Windows::Forms::GroupBox());

            this->radioButtonLinie = (gcnew System::Windows::Forms::RadioButton());

            this->radioButtonRechteck = (gcnew System::Windows::Forms::RadioButton());

            this->radioButtonKreis = (gcnew System::Windows::Forms::RadioButton());

            this->buttonStart = (gcnew System::Windows::Forms::Button());

            this->buttonLoeschen = (gcnew System::Windows::Forms::Button());

            this->buttonBeenden = (gcnew System::Windows::Forms::Button());

            this->trackBar1 = (gcnew System::Windows::Forms::TrackBar());

            this->colorDialog1 = (gcnew System::Windows::Forms::ColorDialog());

            this->groupBox1->SuspendLayout();

            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->numericUpDownLinieStaerke))->BeginInit();

            this->groupBox2->SuspendLayout();

            this->groupBox3->SuspendLayout();

            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->trackBar1))->BeginInit();

            this->SuspendLayout();

            //

            // panel1

            //

            this->panel1->BackColor = System::Drawing::Color::White;

            this->panel1->BorderStyle = System::Windows::Forms::BorderStyle::FixedSingle;

            this->panel1->Location = System::Drawing::Point(12, 12);

            this->panel1->Name = L"panel1";

            this->panel1->Size = System::Drawing::Size(300, 300);

            this->panel1->TabIndex = 0;

            //

            // groupBox1

            //

            this->groupBox1->Controls->Add(this->panelLinieFarbeVorschau);

            this->groupBox1->Controls->Add(this->buttonLinieFarbe);

            this->groupBox1->Controls->Add(this->label3);

            this->groupBox1->Controls->Add(this->label2);

            this->groupBox1->Controls->Add(this->label1);

            this->groupBox1->Controls->Add(this->numericUpDownLinieStaerke);

            this->groupBox1->Controls->Add(this->listBoxLinieStil);

            this->groupBox1->Location = System::Drawing::Point(326, 12);

            this->groupBox1->Name = L"groupBox1";

            this->groupBox1->Size = System::Drawing::Size(200, 111);

            this->groupBox1->TabIndex = 0;

            this->groupBox1->TabStop = false;

            this->groupBox1->Text = L"Linie";

            //

            // panelLinieFarbeVorschau

            //

            this->panelLinieFarbeVorschau->BackColor = System::Drawing::Color::Black;

            this->panelLinieFarbeVorschau->Location = System::Drawing::Point(51, 19);

            this->panelLinieFarbeVorschau->Name = L"panelLinieFarbeVorschau";

            this->panelLinieFarbeVorschau->Size = System::Drawing::Size(24, 22);

            this->panelLinieFarbeVorschau->TabIndex = 7;

            //

            // buttonLinieFarbe

            //

            this->buttonLinieFarbe->Location = System::Drawing::Point(92, 19);

            this->buttonLinieFarbe->Name = L"buttonLinieFarbe";

            this->buttonLinieFarbe->Size = System::Drawing::Size(30, 23);

            this->buttonLinieFarbe->TabIndex = 6;

            this->buttonLinieFarbe->Text = L"...";

            this->buttonLinieFarbe->UseVisualStyleBackColor = true;

            this->buttonLinieFarbe->Click += gcnew System::EventHandler(this, &Form1::buttonLinieFarbe_Click);

            //

            // label3

            //

            this->label3->AutoSize = true;

            this->label3->Location = System::Drawing::Point(6, 85);

            this->label3->Name = L"label3";

            this->label3->Size = System::Drawing::Size(41, 13);

            this->label3->TabIndex = 5;

            this->label3->Text = L"Stärke:";

            //

            // label2

            //

            this->label2->AutoSize = true;

            this->label2->Location = System::Drawing::Point(6, 47);

            this->label2->Name = L"label2";

            this->label2->Size = System::Drawing::Size(24, 13);

            this->label2->TabIndex = 4;

            this->label2->Text = L"Stil:";

            //

            // label1

            //

            this->label1->AutoSize = true;

            this->label1->Location = System::Drawing::Point(6, 19);

            this->label1->Name = L"label1";

            this->label1->Size = System::Drawing::Size(37, 13);

            this->label1->TabIndex = 3;

            this->label1->Text = L"Farbe:";

            //

            // numericUpDownLinieStaerke

            //

            this->numericUpDownLinieStaerke->Location = System::Drawing::Point(47, 83);

            this->numericUpDownLinieStaerke->Maximum = System::Decimal(gcnew cli::array< System::Int32 >(4) {20, 0, 0, 0});

            this->numericUpDownLinieStaerke->Minimum = System::Decimal(gcnew cli::array< System::Int32 >(4) {1, 0, 0, 0});

            this->numericUpDownLinieStaerke->Name = L"numericUpDownLinieStaerke";

            this->numericUpDownLinieStaerke->Size = System::Drawing::Size(120, 20);

            this->numericUpDownLinieStaerke->TabIndex = 2;

            this->numericUpDownLinieStaerke->Value = System::Decimal(gcnew cli::array< System::Int32 >(4) {1, 0, 0, 0});

            //

            // listBoxLinieStil

            //

            this->listBoxLinieStil->DrawMode = System::Windows::Forms::DrawMode::OwnerDrawFixed;

            this->listBoxLinieStil->FormattingEnabled = true;

            this->listBoxLinieStil->Location = System::Drawing::Point(46, 47);

            this->listBoxLinieStil->Name = L"listBoxLinieStil";

            this->listBoxLinieStil->Size = System::Drawing::Size(120, 30);

            this->listBoxLinieStil->TabIndex = 1;

            this->listBoxLinieStil->DrawItem += gcnew System::Windows::Forms::DrawItemEventHandler(this, &Form1::listBoxLinieStil_DrawItem);

            //

            // groupBox2

            //

            this->groupBox2->Controls->Add(this->panelHintergrundFarbeVorschau);

            this->groupBox2->Controls->Add(this->label5);

            this->groupBox2->Controls->Add(this->buttonHintergrundFarbe);

            this->groupBox2->Controls->Add(this->label4);

            this->groupBox2->Controls->Add(this->listBoxHintergrundMuster);

            this->groupBox2->Controls->Add(this->radioButtonHintergrundMuster);

            this->groupBox2->Controls->Add(this->radioButtonHintergrundFarbe);

            this->groupBox2->Controls->Add(this->radioButtonHintergrundOhne);

            this->groupBox2->Location = System::Drawing::Point(326, 129);

            this->groupBox2->Name = L"groupBox2";

            this->groupBox2->Size = System::Drawing::Size(200, 110);

            this->groupBox2->TabIndex = 1;

            this->groupBox2->TabStop = false;

            this->groupBox2->Text = L"Hintergrund";

            //

            // panelHintergrundFarbeVorschau

            //

            this->panelHintergrundFarbeVorschau->BackColor = System::Drawing::Color::Black;

            this->panelHintergrundFarbeVorschau->Location = System::Drawing::Point(51, 41);

            this->panelHintergrundFarbeVorschau->Name = L"panelHintergrundFarbeVorschau";

            this->panelHintergrundFarbeVorschau->Size = System::Drawing::Size(24, 22);

            this->panelHintergrundFarbeVorschau->TabIndex = 9;

            //

            // label5

            //

            this->label5->AutoSize = true;

            this->label5->Location = System::Drawing::Point(6, 69);

            this->label5->Name = L"label5";

            this->label5->Size = System::Drawing::Size(24, 13);

            this->label5->TabIndex = 7;

            this->label5->Text = L"Stil:";

            //

            // buttonHintergrundFarbe

            //

            this->buttonHintergrundFarbe->Location = System::Drawing::Point(92, 42);

            this->buttonHintergrundFarbe->Name = L"buttonHintergrundFarbe";

            this->buttonHintergrundFarbe->Size = System::Drawing::Size(30, 23);

            this->buttonHintergrundFarbe->TabIndex = 8;

            this->buttonHintergrundFarbe->Text = L"...";

            this->buttonHintergrundFarbe->UseVisualStyleBackColor = true;

            this->buttonHintergrundFarbe->Click += gcnew System::EventHandler(this, &Form1::buttonHintergrundFarbe_Click);

            //

            // label4

            //

            this->label4->AutoSize = true;

            this->label4->Location = System::Drawing::Point(6, 45);

            this->label4->Name = L"label4";

            this->label4->Size = System::Drawing::Size(37, 13);

            this->label4->TabIndex = 6;

            this->label4->Text = L"Farbe:";

            //

            // listBoxHintergrundMuster

            //

            this->listBoxHintergrundMuster->DrawMode = System::Windows::Forms::DrawMode::OwnerDrawFixed;

            this->listBoxHintergrundMuster->FormattingEnabled = true;

            this->listBoxHintergrundMuster->Location = System::Drawing::Point(47, 69);

            this->listBoxHintergrundMuster->Name = L"listBoxHintergrundMuster";

            this->listBoxHintergrundMuster->Size = System::Drawing::Size(120, 30);

            this->listBoxHintergrundMuster->TabIndex = 4;

            this->listBoxHintergrundMuster->DrawItem += gcnew System::Windows::Forms::DrawItemEventHandler(this, &Form1::listBoxHintergrundMuster_DrawItem);

            //

            // radioButtonHintergrundMuster

            //

            this->radioButtonHintergrundMuster->AutoSize = true;

            this->radioButtonHintergrundMuster->Location = System::Drawing::Point(137, 19);

            this->radioButtonHintergrundMuster->Name = L"radioButtonHintergrundMuster";

            this->radioButtonHintergrundMuster->Size = System::Drawing::Size(57, 17);

            this->radioButtonHintergrundMuster->TabIndex = 2;

            this->radioButtonHintergrundMuster->Text = L"Muster";

            this->radioButtonHintergrundMuster->UseVisualStyleBackColor = true;

            //

            // radioButtonHintergrundFarbe

            //

            this->radioButtonHintergrundFarbe->AutoSize = true;

            this->radioButtonHintergrundFarbe->Location = System::Drawing::Point(70, 19);

            this->radioButtonHintergrundFarbe->Name = L"radioButtonHintergrundFarbe";

            this->radioButtonHintergrundFarbe->Size = System::Drawing::Size(52, 17);

            this->radioButtonHintergrundFarbe->TabIndex = 1;

            this->radioButtonHintergrundFarbe->Text = L"Farbe";

            this->radioButtonHintergrundFarbe->UseVisualStyleBackColor = true;

            //

            // radioButtonHintergrundOhne

            //

            this->radioButtonHintergrundOhne->AutoSize = true;

            this->radioButtonHintergrundOhne->Checked = true;

            this->radioButtonHintergrundOhne->Location = System::Drawing::Point(9, 19);

            this->radioButtonHintergrundOhne->Name = L"radioButtonHintergrundOhne";

            this->radioButtonHintergrundOhne->Size = System::Drawing::Size(49, 17);

            this->radioButtonHintergrundOhne->TabIndex = 0;

            this->radioButtonHintergrundOhne->TabStop = true;

            this->radioButtonHintergrundOhne->Text = L"ohne";

            this->radioButtonHintergrundOhne->UseVisualStyleBackColor = true;

            //

            // groupBox3

            //

            this->groupBox3->Controls->Add(this->radioButtonLinie);

            this->groupBox3->Controls->Add(this->radioButtonRechteck);

            this->groupBox3->Controls->Add(this->radioButtonKreis);

            this->groupBox3->Location = System::Drawing::Point(326, 245);

            this->groupBox3->Name = L"groupBox3";

            this->groupBox3->Size = System::Drawing::Size(200, 52);

            this->groupBox3->TabIndex = 2;

            this->groupBox3->TabStop = false;

            this->groupBox3->Text = L"Figur";

            //

            // radioButtonLinie

            //

            this->radioButtonLinie->AutoSize = true;

            this->radioButtonLinie->Location = System::Drawing::Point(137, 19);

            this->radioButtonLinie->Name = L"radioButtonLinie";

            this->radioButtonLinie->Size = System::Drawing::Size(47, 17);

            this->radioButtonLinie->TabIndex = 2;

            this->radioButtonLinie->Text = L"Linie";

            this->radioButtonLinie->UseVisualStyleBackColor = true;

            //

            // radioButtonRechteck

            //

            this->radioButtonRechteck->AutoSize = true;

            this->radioButtonRechteck->Location = System::Drawing::Point(61, 19);

            this->radioButtonRechteck->Name = L"radioButtonRechteck";

            this->radioButtonRechteck->Size = System::Drawing::Size(72, 17);

            this->radioButtonRechteck->TabIndex = 1;

            this->radioButtonRechteck->Text = L"Rechteck";

            this->radioButtonRechteck->UseVisualStyleBackColor = true;

            //

            // radioButtonKreis

            //

            this->radioButtonKreis->AutoSize = true;

            this->radioButtonKreis->Checked = true;

            this->radioButtonKreis->Location = System::Drawing::Point(9, 19);

            this->radioButtonKreis->Name = L"radioButtonKreis";

            this->radioButtonKreis->Size = System::Drawing::Size(48, 17);

            this->radioButtonKreis->TabIndex = 0;

            this->radioButtonKreis->TabStop = true;

            this->radioButtonKreis->Text = L"Kreis";

            this->radioButtonKreis->UseVisualStyleBackColor = true;

            //

            // buttonStart

            //

            this->buttonStart->Location = System::Drawing::Point(326, 347);

            this->buttonStart->Name = L"buttonStart";

            this->buttonStart->Size = System::Drawing::Size(75, 23);

            this->buttonStart->TabIndex = 4;

            this->buttonStart->Text = L"Los geht\'s";

            this->buttonStart->UseVisualStyleBackColor = true;

            this->buttonStart->Click += gcnew System::EventHandler(this, &Form1::buttonStart_Click);

            //

            // buttonLoeschen

            //

            this->buttonLoeschen->Location = System::Drawing::Point(407, 347);

            this->buttonLoeschen->Name = L"buttonLoeschen";

            this->buttonLoeschen->Size = System::Drawing::Size(75, 23);

            this->buttonLoeschen->TabIndex = 5;

            this->buttonLoeschen->Text = L"Löschen";

            this->buttonLoeschen->UseVisualStyleBackColor = true;

            this->buttonLoeschen->Click += gcnew System::EventHandler(this, &Form1::buttonLoeschen_Click);

            //

            // buttonBeenden

            //

            this->buttonBeenden->Location = System::Drawing::Point(488, 347);

            this->buttonBeenden->Name = L"buttonBeenden";

            this->buttonBeenden->Size = System::Drawing::Size(75, 23);

            this->buttonBeenden->TabIndex = 6;

            this->buttonBeenden->Text = L"Beenden";

            this->buttonBeenden->UseVisualStyleBackColor = true;

            this->buttonBeenden->Click += gcnew System::EventHandler(this, &Form1::buttonBeenden_Click);

            //

            // trackBar1

            //

            this->trackBar1->Location = System::Drawing::Point(326, 303);

            this->trackBar1->Maximum = 3;

            this->trackBar1->Minimum = 1;

            this->trackBar1->Name = L"trackBar1";

            this->trackBar1->Size = System::Drawing::Size(200, 45);

            this->trackBar1->TabIndex = 3;

            this->trackBar1->Value = 2;

            //

            // Form1

            //

            this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);

            this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;

            this->ClientSize = System::Drawing::Size(584, 382);

            this->Controls->Add(this->buttonLoeschen);

            this->Controls->Add(this->buttonBeenden);

            this->Controls->Add(this->buttonStart);

            this->Controls->Add(this->groupBox3);

            this->Controls->Add(this->groupBox2);

            this->Controls->Add(this->groupBox1);

            this->Controls->Add(this->panel1);

            this->Controls->Add(this->trackBar1);

            this->Name = L"Form1";

            this->Text = L"Eine Spielerei";

            this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);

            this->groupBox1->ResumeLayout(false);

            this->groupBox1->PerformLayout();

            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->numericUpDownLinieStaerke))->EndInit();

            this->groupBox2->ResumeLayout(false);

            this->groupBox2->PerformLayout();

            this->groupBox3->ResumeLayout(false);

            this->groupBox3->PerformLayout();

            (cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->trackBar1))->EndInit();

            this->ResumeLayout(false);

            this->PerformLayout();



        }

#pragma endregion



private: System::Void buttonBeenden_Click(System::Object^  sender, System::EventArgs^  e) {

             Close();

         }

private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {

            //die Linienfarbe auf Schwarz setzen

             linienFarbe = Color::Black;

             //und auch die Hintergrundfarbe

             hintergrundFarbe = Color::Black;

             //die Einträge für die Linienstile erzeugen

            for each (Drawing2D::DashStyle element in linienstil)

                listBoxLinieStil->Items->Add("");

            //und für die Hintergrundmuster

            for each (Drawing2D::HatchStyle element in fuellstil)

                listBoxHintergrundMuster->Items->Add("");

            //einen Handle auf die Zeichenfläche des Panels setzen

            //zeichenflaeche ist als Attribut der Klasse Form1 vereinbart

            zeichenflaeche = panel1->CreateGraphics();

         }

private: System::Void buttonLoeschen_Click(System::Object^  sender, System::EventArgs^  e) {

             //die Zeichenfläche löschen

             zeichenflaeche->Clear(panel1->BackColor);

         }

private: System::Void buttonStart_Click(System::Object^  sender, System::EventArgs^  e) {

            //eine lokale Variable für die Größe

            Int32 groesse;

            //einen schwarzen Stift erzeugen

            Pen ^stift = gcnew Pen(linienFarbe);

            //einen schwarzen Pinsel erzeugen

            SolidBrush ^pinsel = gcnew SolidBrush(hintergrundFarbe);

            //die Dicke des Stiftes setzen

            stift->Width=Convert::ToSingle(numericUpDownLinieStaerke->Value);

            //den Linienstil setzen

            if (listBoxLinieStil->SelectedIndex>=0)

                stift->DashStyle=linienstil[listBoxLinieStil->SelectedIndex];



            //die Größe der Figur ermitteln

            switch (trackBar1->Value) {

                case 1: groesse=125;

                        break;

                case 2: groesse=100;

                        break;

                case 3: groesse=75;

                        break;

            }

            //Figur ermitteln

            //beim Kreis und beim Rechteck auch die Füllung überprüfen

            if (radioButtonKreis->Checked == true) {

                if (radioButtonHintergrundOhne->Checked == true)

                    zeichenflaeche->DrawEllipse(stift, panel1->ClientRectangle.Left + groesse, panel1->ClientRectangle.Top + groesse, panel1->ClientRectangle.Width - (groesse*2), panel1->ClientRectangle.Height - (groesse * 2));

                if (radioButtonHintergrundFarbe->Checked == true)

                    zeichenflaeche->FillEllipse(pinsel, panel1->ClientRectangle.Left + groesse, panel1->ClientRectangle.Top + groesse, panel1->ClientRectangle.Width - (groesse*2), panel1->ClientRectangle.Height - (groesse * 2));

                //soll mit Muster gezeichnet werden und ist ein Muster ausgewählt?

                if (radioButtonHintergrundMuster->Checked == true && listBoxHintergrundMuster->SelectedIndex>=0) {

                    //einen neuen Pinsel für das Muster erzeugen

                    //die Vordergrundfarbe kommt vom Stift, der Hintergrund ist immer weiß

                    Drawing2D::HatchBrush ^musterPinsel = gcnew Drawing2D::HatchBrush(fuellstil[listBoxHintergrundMuster->SelectedIndex], stift->Color, Color::White);

                    zeichenflaeche->FillEllipse(musterPinsel,panel1->ClientRectangle.Left+groesse, panel1->ClientRectangle.Top+groesse,panel1->ClientRectangle.Width-(groesse*2), panel1->ClientRectangle.Height-(groesse*2));

                    delete musterPinsel;

                }

            }

            if (radioButtonRechteck->Checked == true) {

                if (radioButtonHintergrundOhne->Checked == true)

                    zeichenflaeche->DrawRectangle(stift, panel1->ClientRectangle.Left + groesse, panel1->ClientRectangle.Top + groesse, panel1->ClientRectangle.Width - (groesse*2), panel1->ClientRectangle.Height - (groesse * 2));

                if (radioButtonHintergrundFarbe->Checked == true)

                    zeichenflaeche->FillRectangle(pinsel, panel1->ClientRectangle.Left + groesse, panel1->ClientRectangle.Top + groesse, panel1->ClientRectangle.Width - (groesse*2), panel1->ClientRectangle.Height - (groesse * 2));

                 //soll mit Muster gezeichnet werden und ist ein Muster ausgewählt?

                 if (radioButtonHintergrundMuster->Checked == true && listBoxHintergrundMuster->SelectedIndex>=0) {

                     //einen neuen Pinsel für das Muster erzeugen

                     //die Vordergrundfarbe kommt vom Stift, der Hintergrund ist immer weiß

                     Drawing2D::HatchBrush ^musterPinsel = gcnew Drawing2D::HatchBrush(fuellstil[listBoxHintergrundMuster->SelectedIndex], stift->Color, Color::White);

                     zeichenflaeche->FillRectangle(musterPinsel,panel1->ClientRectangle.Left+groesse, panel1->ClientRectangle.Top+groesse,panel1->ClientRectangle.Width-(groesse*2), panel1->ClientRectangle.Height-(groesse*2));

                     delete musterPinsel;

                 }

            }

            if (radioButtonLinie->Checked == true)

                zeichenflaeche->DrawLine(stift, panel1->ClientRectangle.Left + groesse, panel1->ClientRectangle.Height / 2, panel1->ClientRectangle.Width - groesse, panel1->ClientRectangle.Height / 2);

            //Stift und Pinsel löschen

            delete stift;

            delete pinsel;

         }

private: System::Void buttonLinieFarbe_Click(System::Object^  sender, System::EventArgs^  e) {

            //den Dialog zur Farbauswahl anzeigen

            if (colorDialog1->ShowDialog() == Windows::Forms::DialogResult::OK) {

                //die Hintergrundfarbe für das Panel auf die ausgewählte Farbe setzen

                panelLinieFarbeVorschau->BackColor=colorDialog1->Color;

                //und die Linienfarbe

                //linienFarbe ist ein Attribut der Klasse Form1

                linienFarbe=colorDialog1->Color;

            }

         }

private: System::Void buttonHintergrundFarbe_Click(System::Object^  sender, System::EventArgs^  e) {

            //den Dialog zur Farbauswahl anzeigen

            if (colorDialog1->ShowDialog() == Windows::Forms::DialogResult::OK) {

                //die Hintergrundfarbe für das Panel auf die ausgewählte Farbe setzen

                panelHintergrundFarbeVorschau->BackColor=colorDialog1->Color;

                //und die eigentliche Hintergrundfarbe

                //hintergrundFarbe ist ein Attribut der Klasse Form1

                hintergrundFarbe=colorDialog1->Color;

                //die Auswahl Farbe aktivieren

                radioButtonHintergrundFarbe->Checked=true;

            }

        }

private: System::Void listBoxLinieStil_DrawItem(System::Object^  sender, System::Windows::Forms::DrawItemEventArgs^  e) {

            //eine lokale Variable für die Berechnung der Mitte

            Int32 Y;

            //ein neuer lokaler Stift

            Pen ^boxStift = gcnew Pen(Color::Black);

            //die Mitte berechnen

            Y=(e->Bounds.Top + e->Bounds.Bottom)/2;

            //den Hintergrund zeichnen

            e->DrawBackground();

            //und die Linie

            boxStift->DashStyle=linienstil[e->Index];

            e->Graphics->DrawLine(boxStift, e->Bounds.Left+1, Y, e->Bounds.Right-1, Y);

            //den Stift löschen

            delete boxStift;

         }

private: System::Void listBoxHintergrundMuster_DrawItem(System::Object^  sender, System::Windows::Forms::DrawItemEventArgs^  e) {

            //ein neuer lokaler Pinsel für das Muster

            Drawing2D::HatchBrush ^boxPinsel = gcnew Drawing2D::HatchBrush(fuellstil[e->Index], Color::Black, Color::White);

            //den Hintergrund zeichnen

            e->DrawBackground();

            //und das Rechteck

            e->Graphics->FillRectangle(boxPinsel, e->Bounds.Left+1, e->Bounds.Top+1, e->Bounds.Width-1, e->Bounds.Height-1);

            //den Pinsel löschen

            delete boxPinsel;

         }

};

}