// Method is called when the current tab selected is changed
// Depending on which tab is selected, method removes and adds the corresponding grapher instance
// This method demonstrates the dynamic creation of user controls
private void TabControlSelectedIndexChanged(object sender, EventArgs e)
{
// If the Integration tab is selected
if (TabControl.SelectedIndex == 0)
{
// Remove the current AreaPlotter instance from the TabControl
TabIntegration.Controls.Remove(areaPlotter);
// Create a new default Mid Ordinate Plotter instance with default properties
areaPlotter = new MidOrdPlotter();
areaPlotter.ResultChange += AreaPlotterResultChange;
areaPlotter.Size = new Size(605, 500);
areaPlotter.Lower = 0;
areaPlotter.Upper = 10;
areaPlotter.Equation = EquationTextBox.Text;
areaPlotter.Dock = DockStyle.Fill;
areaPlotter.Resize += PlotterResize;
areaPlotter.PositionMove += PlotterPositionMove;
// Update the parameter controls on the form to show changes
UpperLimitTextBox.Text = areaPlotter.Upper.ToString(CultureInfo.InvariantCulture);
LowerLimitTextBox.Text = areaPlotter.Lower.ToString(CultureInfo.InvariantCulture);
IterationsTextBox.Text = areaPlotter.Iterations.ToString(CultureInfo.InvariantCulture);
// Add the new AreaPlotter to the TabControl
TabIntegration.Controls.Add(areaPlotter);
// Focus the new AreaPlotter control
areaPlotter.Focus();
}
// If the Differentiation tab is selected
else if (TabControl.SelectedIndex == 1)
{
// Remove the current DifferentiationPlotter instance from the TabControl
TabDifferentiation.Controls.Remove(differentiationPlotter);
// Create a new default DifferentiationPlotter instance with default properties
differentiationPlotter = new DifferentiationPlotter();
differentiationPlotter.ResultChange += DifferentiationPlotterResultChange;
differentiationPlotter.Size = new Size(605, 527);
differentiationPlotter.Equation = EquationTextBox.Text;
differentiationPlotter.Dock = DockStyle.Fill;
differentiationPlotter.Resize += PlotterResize;
differentiationPlotter.PositionMove += PlotterPositionMove;
// Add the new DifferentiationPlotter to the TabControl
TabDifferentiation.Controls.Add(differentiationPlotter);
// Focus the new DifferentiationPlotter control
differentiationPlotter.Focus();
}
// If the Extrema tab is selected
else if (TabControl.SelectedIndex == 2)
{
// Remove the current ExtremaPlotter instance from the TabControl
TabExtrema.Controls.Remove(extremaPlotter);
// Create a new default ExtremaPlotter instance with default properties
extremaPlotter = new ExtremaPlotter();
extremaPlotter.Dock = DockStyle.Fill;
extremaPlotter.Size = new Size(605, 527);
extremaPlotter.Equation = EquationTextBox.Text;
extremaPlotter.Resize += PlotterResize;
extremaPlotter.PositionMove += PlotterPositionMove;
// Add the new ExtremaPlotter to the TabControl
TabExtrema.Controls.Add(extremaPlotter);
// Focus the new ExtremaPlotter control
extremaPlotter.Focus();
}
// If the Iterations tab is selected
else if (TabControl.SelectedIndex == 3)
{
// Calculate a new results set and populate the listview control
CalculateResults();
}
}
// Method is called whenever the user presses a radio button to change the method of integration
// Method removes the current grapher from the tab and adds a corresponding AreaPlotter depending on which
// rule of integration has been chosen
// This method demonstrates the dynamic creation of user controls
private void AreaGrapherChange(object sender, EventArgs e)
{
// Cast the sender object to a RadioButton object to determine which radiobutton was pressed
var button = sender as RadioButton;
// If the sender was not a RadioButton instance, exit the method
if (button == null) return;
// Get the properties of the current AreaPlotter instance and store in variables
float x = areaPlotter.OriginX;
float y = areaPlotter.OriginY;
int zoom = areaPlotter.Zoom;
float low = areaPlotter.Lower;
float upper = areaPlotter.Upper;
int iter = areaPlotter.Iterations;
// Remove the current AreaPlotter instance from the TabControl
TabIntegration.Controls.Remove(areaPlotter);
// Dispose of the AreaPlotter instance to free resources
areaPlotter.Dispose();
// If the Mid Ordinate rule RadioButton was pressed
if (button.Name.Equals("MidOrdRuleRadioButton"))
{
// Set the AreaPlotter instance to become a new Mid Ordinate Plotter
areaPlotter = new MidOrdPlotter();
}
// If the Trapezium rule RadioButton was pressed
else if (button.Name.Equals("TrapeziumRuleRadioButton"))
{
// Set the AreaPlotter instance to become a new Trapezium Plotter
areaPlotter = new TrapeziumPlotter();
}
// If the Simpsons rule RadioButton was pressed
else
{
// Set the AreaPlotter instance to become a new Simpsons Plotter
areaPlotter = new SimpsonPlotter();
}
// Add event handlers to the new AreaPlotter
areaPlotter.ResultChange += AreaPlotterResultChange;
areaPlotter.Resize += PlotterResize;
areaPlotter.PositionMove += PlotterPositionMove;
// Set the default size of the AreaPlotter
areaPlotter.Size = new Size(605, 500);
// Add the new AreaPlotter to the TabControl
TabIntegration.Controls.Add(areaPlotter);
// Assign the properties of the new AreaPlotter instance to that of the old AreaPlotter
areaPlotter.OriginX = x;
areaPlotter.OriginY = y;
areaPlotter.Zoom = zoom;
areaPlotter.Lower = low;
areaPlotter.Upper = upper;
areaPlotter.Iterations = iter;
areaPlotter.Equation = EquationTextBox.Text;
areaPlotter.Dock = DockStyle.Fill;
// Repaint the AreaPlotter to show changes
areaPlotter.Invalidate();
// Update the parameters and result label
AreaParamsChange(null, new KeyEventArgs(Keys.Return));
IntegrationResultLabel.Text = Math.Round(areaPlotter.Result, 4).ToString(CultureInfo.InvariantCulture);
}
