/// <summary>
/// Makes main form repaint a set of controls.
/// </summary>
internal virtual void MakeControlsPaint(ReadOnlyCollection <ControlToPaint> ctrls)
{
if (parent != null)
{
parent.MakeControlsPaint(ctrls);
}
}
/// <summary>
/// Actual timer event handler, so first-level handler can deal only with exception wrapping.
/// </summary>
private void doTimerEvent()
{
List <ZenControlBase> subscribers;
lock (timerSubscribers)
{
subscribers = new List <ZenControlBase>(timerSubscribers);
}
List <ZenControlBase.ControlToPaint> ctrlsToPaint = new List <ZenControlBase.ControlToPaint>();
foreach (ZenControlBase ctrl in subscribers)
{
bool? needBackground;
RenderMode?renderMode;
ctrl.DoTimer(out needBackground, out renderMode);
if (renderMode != null)
{
ctrlsToPaint.Add(new ZenControlBase.ControlToPaint(ctrl, needBackground.Value, renderMode.Value));
}
}
// If any controls requested a pain callback, do it
if (ctrlsToPaint.Count != 0)
{
parent.MakeControlsPaint(new ReadOnlyCollection <ZenControlBase.ControlToPaint>(ctrlsToPaint));
}
// Start counting again
timer.Start();
}
/// <summary>
/// Triggers a callback to control's <see cref="DoPaint"/>, then re-renders canvas.
/// </summary>
/// <param name="needBackground">If true, full canvas is repainted to control can render over stuff outside it's own rectangle.</param>
/// <param name="rm">Determines when canvas is re-rendered after painting.</param>
protected void MakeMePaint(bool needBackground, RenderMode rm)
{
// Request comes from background thread. In the UI thread, parent may just have been removed.
// If I have no parent, silently do not invoke.
// Happens when an animation is in progress and user switches to different tab in top form
ZenControlBase parent = Parent;
if (parent != null)
{
ControlToPaint[] ctrls = new ControlToPaint[1];
ctrls[0] = new ControlToPaint(this, needBackground, rm);
parent.MakeControlsPaint(new ReadOnlyCollection <ControlToPaint>(ctrls));
}
}
