/// <summary>
/// Closes the currently selected text editor window.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FileClose(object sender, EventArgs e)
{
// If there is an active window:
if (this.MdiChildren.Length > 0)
{
// If the text editor window is the currently active window...
if (this.ActiveMdiChild.GetType() == typeof(formTextEditor))
{
// ...call the text editor's close event handler.
formTextEditor textEditorInstance =
(formTextEditor)this.ActiveMdiChild;
textEditorInstance.FileClose(sender, e);
}
// If the Car Inventory window is the currently active window...
else if (this.ActiveMdiChild.GetType() == typeof(formCarInventory))
{
// ...call the window's close event handler.
formCarInventory carInventoryInstance =
(formCarInventory)this.ActiveMdiChild;
carInventoryInstance.ButtonCloseClick(sender, e);
}
// If the Average Units Shipped window is the currently active window...
else if (this.ActiveMdiChild.GetType() == typeof(formAverageUnitsShipped))
{
// ...call the window's close event handler.
formAverageUnitsShipped unitsShippedInstance =
(formAverageUnitsShipped)this.ActiveMdiChild;
unitsShippedInstance.ButtonCloseClick(sender, e);
}
// If the Weekly Temperature window is the currently active window...
else if (this.ActiveMdiChild.GetType() == typeof(formWeeklyTemperature))
{
// ...call the Car Inventory's close event handler.
formWeeklyTemperature temperatureInstance =
(formWeeklyTemperature)this.ActiveMdiChild;
temperatureInstance.ButtonCloseClick(sender, e);
}
// If any window specified above is not the active window...
else
{
// ...display an appropriate message.
MessageBox.Show("The Close operation is not supported by the " +
"currently selected window.", "Operation Not Supported");
}
}
else
{
MessageBox.Show("To Close a window, a window must first be open.",
"Operation Not Supported");
}
}
/// <summary>
/// Create and display a Car Inventory instance as an MDI child.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void WindowCarList(object sender, EventArgs e)
{
// Create/call Car Inventory Form instance called listInstance.
formCarInventory listInstance = formCarInventory.Instance;
// Set it as an MDI child.
listInstance.MdiParent = this;
// Display the window.
listInstance.Show();
// Set focus to the new window.
listInstance.Focus();
}
/// <summary>
/// Upon the CarInventory instance closing, the contents of the instance
/// variable is destroyed.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CarInventoryClosing(object sender, FormClosingEventArgs e)
{
instance = null;
}