//===========================================================================
//                            ZAJECIA 1 - APLIKACJA
//---Zad.1-------------------------------------------------------------------
private:System::Void button1_Click(System::Object^sender, System::EventArgs^e)
{
  this->panel1->BackColor = Color::Red;
}
private:System::Void button2_Click(System::Object^sender, System::EventArgs^e)
{
  panel1->BackColor = Color::Blue;
}
//---Zad.2-------------------------------------------------------------------
private:System::Void button3_Click(System::Object^sender, System::EventArgs^e)
{
  if(panel2->BackColor == Color::Blue)
    panel2->BackColor = Color::Red;
  else
    panel2->BackColor = Color::Blue;
}
//---Zad.3-------------------------------------------------------------------
private: System::Void button4_Click(System::Object^  sender, System::EventArgs^  e)
{
  if(panel3->BackColor == Color::Blue)
  {
    panel3->BackColor = Color::Red;
    button4->Text=L"Czerwony";
  }
  else
  {
    panel3->BackColor = Color::Blue;
    button4->Text=L"Niebieski";
  }
}
//---Zad.4-------------------------------------------------------------------
private:System::Void comboBox1_SelectedIndexChanged(System::Object^sender, System::EventArgs^ e)
{
       if(comboBox1->SelectedIndex==0)    textBox1->BackColor=Color::Red;
  else if(comboBox1->SelectedIndex==1)    textBox1->BackColor=Color::Green;
  else if(comboBox1->SelectedIndex==2)    textBox1->BackColor=Color::Blue;
}
private:System::Void checkBox1_CheckedChanged(System::Object^sender, System::EventArgs^e)
{
  textBox1->Visible= ! checkBox1->Checked;
}
private:System::Void hScrollBar1_Scroll(System::Object^sender, System::Windows::Forms::ScrollEventArgs^e)
{
  int x=hScrollBar1->Value;
  int y=textBox1->Size.Height;
  label1->Text=L"X= "+x.ToString();
  textBox1->Size=Drawing::Size(x,y);
}
private:System::Void hScrollBar2_Scroll(System::Object^sender, System::Windows::Forms::ScrollEventArgs^e)
{
  int x=textBox1->Size.Width;
  int y=hScrollBar2->Value;
  label2->Text=L"Y= "+y.ToString();
  textBox1->Size=Drawing::Size(x,y);
}
//---Kalkulator--------------------------------------------------------------
private: System::Void button5_Click(System::Object^  sender, System::EventArgs^  e)
{
  double a,b,w=0.0;
  a= Convert::ToDouble( textBox2->Text);
  b= Convert::ToDouble( textBox3->Text);
  try
  {
       if(comboBox2->SelectedIndex==0)    w=a+b;
  else if(comboBox2->SelectedIndex==1)    w=a-b;
  else if(comboBox2->SelectedIndex==2)    w=a*b;
  else if(comboBox2->SelectedIndex==3)    w=a/b;
  }
  catch(...) //FormatException ^e)
  {
    MessageBox::Show("Musisz podać poprawną wartość liczbową", "Bląd",
                     MessageBoxButtons::OK, MessageBoxIcon::Error);
  }
  textBox4->Text=w.ToString();
}
//---Koniec------------------------------------------------------------------
private: System::Void button6_Click(System::Object^  sender, System::EventArgs^  e)
{
  this->Close();
}