private static void StartTextBoxBlinker(TimedAction timedAction, TRef <int> blinkerCounter)
{
timedAction.Reset(() =>
{
// The blinker is on falf of the time and events such as input
// changes can reset the blinker.
var value = Volatile.Read(ref blinkerCounter.Value);
value = (value + 1) % (2 * TextBoxBlinkThreshold);
Volatile.Write(ref blinkerCounter.Value, value);
}, TextBoxBlinkSleepMilliseconds);
}
private static void StartTextBoxBlinker(TimedAction timedAction, SoftwareKeyboardUiState state, object stateLock)
{
timedAction.Reset(() =>
{
lock (stateLock)
{
// The blinker is on half of the time and events such as input
// changes can reset the blinker.
state.TextBoxBlinkCounter = (state.TextBoxBlinkCounter + 1) % (2 * SoftwareKeyboardRendererBase.TextBoxBlinkThreshold);
// Tell the render thread there is something new to render.
Monitor.PulseAll(stateLock);
}
}, TextBoxBlinkSleepMilliseconds);
}
private static void StartRenderer(TimedAction timedAction, SoftwareKeyboardRendererBase renderer, SoftwareKeyboardUiState state, object stateLock)
{
SoftwareKeyboardUiState internalState = new SoftwareKeyboardUiState();
bool canCreateSurface = false;
bool needsUpdate = true;
timedAction.Reset(() =>
{
lock (stateLock)
{
if (!Monitor.Wait(stateLock, RendererWaitTimeoutMilliseconds))
{
return;
}
needsUpdate = UpdateStateField(ref state.InputText, ref internalState.InputText);
needsUpdate |= UpdateStateField(ref state.CursorBegin, ref internalState.CursorBegin);
needsUpdate |= UpdateStateField(ref state.CursorEnd, ref internalState.CursorEnd);
needsUpdate |= UpdateStateField(ref state.AcceptPressed, ref internalState.AcceptPressed);
needsUpdate |= UpdateStateField(ref state.CancelPressed, ref internalState.CancelPressed);
needsUpdate |= UpdateStateField(ref state.OverwriteMode, ref internalState.OverwriteMode);
needsUpdate |= UpdateStateField(ref state.TypingEnabled, ref internalState.TypingEnabled);
needsUpdate |= UpdateStateField(ref state.ControllerEnabled, ref internalState.ControllerEnabled);
needsUpdate |= UpdateStateField(ref state.TextBoxBlinkCounter, ref internalState.TextBoxBlinkCounter);
canCreateSurface = state.SurfaceInfo != null && internalState.SurfaceInfo == null;
if (canCreateSurface)
{
internalState.SurfaceInfo = state.SurfaceInfo;
}
}
if (canCreateSurface)
{
renderer.CreateSurface(internalState.SurfaceInfo);
}
if (needsUpdate)
{
renderer.DrawMutableElements(internalState);
renderer.CopyImageToBuffer();
needsUpdate = false;
}
});
}