public static void Paint <TState, TParam>(Graphics graphics, Rectangle bounds, PaintAction <TState, TParam> paintAction,
TState currentState, TParam data)
{
using (var g = new SafeDCHandle(graphics))
using (var bp = new BufferedPaintHandle(g, bounds))
paintAction(bp.Graphics, bounds, currentState, data);
}
private void Control_Paint(object sender, PaintEventArgs e)
{
if (BufferedPaintSupported)
{
var stateChanged = !Equals(currentState, newState);
using (var hdc = new SafeDCHandle(e.Graphics))
{
if (!hdc.IsInvalid)
{
// see if this paint was generated by a soft-fade animation
if (!BufferedPaintRenderAnimation(new HandleRef(Control, Control.Handle), hdc))
{
var animParams = new BP_ANIMATIONPARAMS(BP_ANIMATIONSTYLE.BPAS_LINEAR);
// get appropriate animation time depending on state transition (or 0 if unchanged)
if (stateChanged)
{
var transition = Transitions.SingleOrDefault(x => Equals(x.FromState, currentState) && Equals(x.ToState, newState));
animParams.Duration = transition?.Duration ?? DefaultDuration;
}
using (var h = new BufferedPaintHandle(Control, hdc, Control.ClientRectangle, animParams, BP_PAINTPARAMS.NoClip))
{
if (!h.IsInvalid)
{
if (h.SourceGraphics != null)
{
OnPaintVisualState(new BufferedPaintEventArgs <TState>(currentState, h.SourceGraphics));
}
if (h.Graphics != null)
{
OnPaintVisualState(new BufferedPaintEventArgs <TState>(newState, h.Graphics));
}
}
else
{
currentState = newState;
OnPaintVisualState(new BufferedPaintEventArgs <TState>(currentState, e.Graphics));
}
}
}
}
}
}
else
{
// buffered painting not supported, just paint using the current state
currentState = newState;
OnPaintVisualState(new BufferedPaintEventArgs <TState>(currentState, e.Graphics));
}
}
public static void PaintAnimation <TState, TParam>(Graphics graphics, IWin32Window ctrl, Rectangle bounds,
PaintAction <TState, TParam> paintAction, TState currentState, TState newState, GetDuration <TState> getDuration, TParam data)
{
try
{
if (System.Environment.OSVersion.Version.Major >= 6)
{
// If this handle is running with a different state, stop the animations
Tuple <object, object> val;
if (paintAnimationInstances.TryGetValue(ctrl.Handle, out val))
{
if (!Equals(val.Item1, currentState) || !Equals(val.Item2, newState))
{
BufferedPaintStopAllAnimations(new HandleRef(ctrl, ctrl.Handle));
System.Diagnostics.Debug.WriteLine("BufferedPaintStop.");
paintAnimationInstances[ctrl.Handle] = new Tuple <object, object>(currentState, newState);
}
}
else
{
paintAnimationInstances.Add(ctrl.Handle, new Tuple <object, object>(currentState, newState));
}
using (var hdc = new SafeDCHandle(graphics))
{
if (hdc.IsInvalid)
{
return;
}
// see if this paint was generated by a soft-fade animation
if (BufferedPaintRenderAnimation(new HandleRef(ctrl, ctrl.Handle), hdc))
{
paintAnimationInstances.Remove(ctrl.Handle);
return;
}
var animParams = new BP_ANIMATIONPARAMS(BP_ANIMATIONSTYLE.BPAS_LINEAR, getDuration?.Invoke(currentState, newState) ?? 0);
using (var h = new BufferedPaintHandle(ctrl, hdc, bounds, animParams, BP_PAINTPARAMS.NoClip))
{
if (!h.IsInvalid)
{
if (h.SourceGraphics != null)
{
paintAction(h.SourceGraphics, bounds, currentState, data);
}
if (h.Graphics != null)
{
paintAction(h.Graphics, bounds, newState, data);
}
}
else
{
// hdc.Dispose();
paintAction(graphics, bounds, newState, data);
}
}
}
}
else
{
paintAction(graphics, bounds, newState, data);
}
}
catch { }
System.Diagnostics.Debug.WriteLine($"BufferedPaint state items = {paintAnimationInstances.Count}.");
}
