public static void ShowSplash(int fadeinTime,bool showVersion) {
// Only show if not showing already
if (Instance == null) {
Instance = new Splash();
Instance.ShowVersionBox = showVersion;
// Hide initially so as to avoid a nasty pre paint flicker
Instance.Opacity = 0;
Instance.Show();
// Process the initial paint events
Application.DoEvents();
// Perform the fade in
if (fadeinTime > 0) {
// Set the timer interval so that we fade out at the same speed.
int fadeStep = (int)System.Math.Round((double)fadeinTime/20);
Instance.fadeTimer.Interval = fadeStep;
for (int i = 0; i <= fadeinTime; i += fadeStep){
System.Threading.Thread.Sleep(fadeStep);
Instance.Opacity += 0.05;
}
} else {
// Set the timer interval so that we fade out instantly.
Instance.fadeTimer.Interval = 1;
}
Instance.Opacity = 1;
}
}
protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
{
base.OnClosing(e);
// Close immediatly is the timer interval is set to 1 indicating no fade.
if (this.fadeTimer.Interval == 1) {
e.Cancel = false;
return;
}
// Only use the timer to fade out if we have a mainform running otherwise there will be no message pump
if (Application.OpenForms.Count > 1) {
if (this.Opacity > 0) {
e.Cancel = true;
this.Opacity -= 0.05;
// use the timer to iteratively call the close method thereby keeping the GUI thread available for other processes.
this.fadeTimer.Tick -= new System.EventHandler(this.FadeoutTick);
this.fadeTimer.Tick += new System.EventHandler(this.FadeoutTick);
this.fadeTimer.Start();
} else {
e.Cancel = false;
this.fadeTimer.Stop();
// Clear the instance variable so we can reshow the splash, and ensure that we don't try to close it twice
Instance = null;
}
} else {
if (this.Opacity > 0) {
// Sleep on this thread to slow down the fade as there is no message pump running
System.Threading.Thread.Sleep(this.fadeTimer.Interval);
Instance.Opacity -= 0.05;
// iteratively call the close method
this.Close();
} else {
e.Cancel = false;
// Clear the instance variable so we can reshow the splash, and ensure that we don't try to close it twice
Instance = null;
}
}
}
protected override void OnClick(System.EventArgs e) {
// If we are displaying as a about dialog we need to provide a way out.
this.Close();
Instance.Dispose();
Instance = null;
}
