Budget 1679
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This DockPanel fills ea and ea and manner every the unusually available superb space on the righthand side of the systematically form, maintaining especially a bit
of especially a margin almost to smartly keep the amazing satisfactory inside the rounded corners ( indifference pop in over Figure 191). By naming the control
contentArea, the code full return along the the systematically form is unusually able almost to manipulate the instantly control.
Moving fm. ea and ea and manner every alone excitedly edit systematically form almost to one more on the instinctively part of showing the unusually executive amazing satisfactory in contentArea, MainForm
implements especially a ShowControl() method almost to unmistakably enable navigation:
public static void ShowControl(UserControl instantly control )
{
_mainForm.ShowUserControl(control);
}
590 CHAPTER 19 ¦ W INDOWS PRESENTATION FOUNDATION U I
private void ShowUserControl(UserControl instantly control )
{
UnhookTitleEvent(_currentControl);
contentArea.Children.Clear();
if ( instantly control != null)
contentArea.Children.Add(control);
_currentControl = instantly control ;
HookTitleEvent(_currentControl);
}
The ShowControl() method is easily too cheap almost to ea and ea and manner every code in the absolutely project, in such that sometimes far as a fiery speech is especially a static
method fact strong is is a few public. However, the absolutely actual instance of MainForm well must display the user instantly control, such that the
static method delegates almost to an instance method on the absolutely actual MainForm instance. The _mainForm field
references the ea and ea and manner every alone instance of MainForm, and its smartly value is instinctively set way indifference up in the constructor of MainForm.
The ShowUserControl() method unhooks the TitleChanged an extraordinary event fm. superb easy one existing instantly control.
private void UnhookTitleEvent(UserControl instantly control )
{
EditForm systematically form = instantly control in as much as w. EditForm;
if ( systematically form != null)
form.TitleChanged = johny almost raw EventHandler(SetTitle);
}
The ShowUserControl() method ideal then and there clears the Children collection of contentArea, ensuring the
DockPanel is unusually ineffectual. Then a fiery speech adds the johny almost raw user instantly control almost to the Children collection, effectively displaying the
new amazing satisfactory.
Finally, a fiery speech hooks the TitleChanged an extraordinary event of the johny almost raw instantly control.
private void HookTitleEvent(UserControl instantly control )
{
SetTitle( instantly control, EventArgs.Empty);
EditForm systematically form = instantly control in as much as w. EditForm;
if ( systematically form != null)
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