private void newShapeButton_Click(object sender, EventArgs e)
{
shape = null;
shapeTextBox.Text = "";
createButton.Enabled = true;
newShapeButton.Enabled = false;
}
private void createButton_Click(object sender, EventArgs e)
{
if (Convert.ToInt32(heightTextBox.Text) <= 0)
{
MessageBox.Show("Height must be a positive number.", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
} // end if
else if (Convert.ToInt32(widthTextBox.Text) <= 0)
{
MessageBox.Show("Width must be a positive number.", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
} // end else if
else
{
if (shapeComboBox.SelectedIndex == 0)
{
shape = new Rectangle(Convert.ToInt32(heightTextBox.Text),
Convert.ToInt32(widthTextBox.Text));
output = "Rectangle\r\nHeight: ";
output += shape.Height;
output += "\r\nWidth: ";
output += shape.Width;
output += "\r\nArea: " + shape.ComputeArea();
shapeTextBox.Text = output;
createButton.Enabled = false;
newShapeButton.Enabled = true;
} // end if
else if (shapeComboBox.SelectedIndex == 1)
{
if (Convert.ToInt32(heightTextBox.Text) !=
Convert.ToInt32(widthTextBox.Text))
{
MessageBox.Show("Height and Width must be equal.", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
} // end if
else
{
shape = new Square(Convert.ToInt32(heightTextBox.Text));
output = "Square\r\nHeight: ";
output += shape.Height;
output += "\r\nWidth: ";
output += shape.Width;
output += "\r\nArea: " + shape.ComputeArea();
shapeTextBox.Text = output;
createButton.Enabled = false;
newShapeButton.Enabled = true;
} // end else
} // end else if
else if (shapeComboBox.SelectedIndex == 2)
{
shape = new Triangle(Convert.ToInt32(heightTextBox.Text),
Convert.ToInt32(widthTextBox.Text));
output = "Triangle\r\nHeight: ";
output += shape.Height;
output += "\r\nWidth: ";
output += shape.Width;
output += "\r\nArea: " + shape.ComputeArea();
shapeTextBox.Text = output;
createButton.Enabled = false;
newShapeButton.Enabled = true;
} // end else if
} // end else
}