/// <summary>
/// Saves the currently selected text editor, or calls the "Save As" event
/// handler if the file has not already been saved.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FileSave(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 FileSave event handler.
formTextEditor textEditorInstance =
(formTextEditor)this.ActiveMdiChild;
textEditorInstance.FileSave(sender, e);
}
// If the text editor is not the active window...
else
{
// ...display an appropriate message.
MessageBox.Show("The Save operation is not supported by the " +
"currently selected window.", "Operation Not Supported");
}
}
// If there are no active windows...
else
{
// ...display an appropriate message.
MessageBox.Show("You must have an open text editor window to Save.",
"Operation Not Supported");
}
}
/// <summary>
/// Creates a new text editor child window.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FileNew(object sender, EventArgs e)
{
formTextEditor textEditorInstance = new formTextEditor();
textEditorInstance.MdiParent = this;
textEditorInstance.Show();
}
/// <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>
/// Opens a saved text editor document.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void FileOpen(object sender, EventArgs e)
{
// If there is an active window:
if (this.MdiChildren.Length > 0)
{
// If a text editor window is the currently active window...
if (this.ActiveMdiChild.GetType() == typeof(formTextEditor))
{
// ...call the text editor's Open event handler.
formTextEditor textEditorInstance =
(formTextEditor)this.ActiveMdiChild;
textEditorInstance.FileOpen(sender, e);
}
// If a text editor is not the active window:
else
{
// Create a new text editor window.
formTextEditor textEditorInstance = new formTextEditor();
textEditorInstance.MdiParent = this;
textEditorInstance.Show();
// Set focus to the new window and call the Open event handler.
textEditorInstance.Focus();
textEditorInstance.FileOpen(sender, e);
}
}
// If there are no active windows:
else
{
// Create a new text editor window.
formTextEditor textEditorInstance = new formTextEditor();
textEditorInstance.MdiParent = this;
textEditorInstance.Show();
// Set focus to the new window and call the Open event handler.
textEditorInstance.Focus();
textEditorInstance.FileOpen(sender, e);
}
}
