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;
}
});
}
public void DrawMutableElements(SoftwareKeyboardUiState state)
{
if (_surface == null)
{
return;
}
_surface.Mutate(context =>
{
var messageRectangle = MeasureString(MessageText, _messageFont);
float messagePositionX = (_panelRectangle.Width - messageRectangle.Width) / 2 - messageRectangle.X;
float messagePositionY = _messagePositionY - messageRectangle.Y;
var messagePosition = new PointF(messagePositionX, messagePositionY);
var messageBoundRectangle = new RectangleF(messagePositionX, messagePositionY, messageRectangle.Width, messageRectangle.Height);
SetGraphicsOptions(context);
context.Fill(_panelBrush, messageBoundRectangle);
context.DrawText(MessageText, _messageFont, _textNormalColor, messagePosition);
if (!state.TypingEnabled)
{
// Just draw a semi-transparent rectangle on top to fade the component with the background.
// TODO (caian): This will not work if one decides to add make background semi-transparent as well.
context.Fill(_disabledBrush, messageBoundRectangle);
}
DrawTextBox(context, state);
float halfWidth = _panelRectangle.Width / 2;
float buttonsY = _panelRectangle.Y + 185;
PointF acceptButtonPosition = new PointF(halfWidth - 180, buttonsY);
PointF cancelButtonPosition = new PointF(halfWidth, buttonsY);
PointF disableButtonPosition = new PointF(halfWidth + 180, buttonsY);
DrawPadButton(context, acceptButtonPosition, _padAcceptIcon, AcceptText, state.AcceptPressed, state.ControllerEnabled);
DrawPadButton(context, cancelButtonPosition, _padCancelIcon, CancelText, state.CancelPressed, state.ControllerEnabled);
});
}
private void DrawTextBox(IImageProcessingContext context, SoftwareKeyboardUiState state)
{
var inputTextRectangle = MeasureString(state.InputText, _inputTextFont);
float boxWidth = (int)(Math.Max(300, inputTextRectangle.Width + inputTextRectangle.X + 8));
float boxHeight = 32;
float boxY = _panelRectangle.Y + 110;
float boxX = (int)((_panelRectangle.Width - boxWidth) / 2);
RectangleF boxRectangle = new RectangleF(boxX, boxY, boxWidth, boxHeight);
RectangleF boundRectangle = new RectangleF(_panelRectangle.X, boxY - _textBoxOutlineWidth,
_panelRectangle.Width, boxHeight + 2 * _textBoxOutlineWidth);
context.Fill(_panelBrush, boundRectangle);
context.Draw(_textBoxOutlinePen, boxRectangle);
float inputTextX = (_panelRectangle.Width - inputTextRectangle.Width) / 2 - inputTextRectangle.X;
float inputTextY = boxY + 5;
var inputTextPosition = new PointF(inputTextX, inputTextY);
context.DrawText(state.InputText, _inputTextFont, _textNormalColor, inputTextPosition);
// Draw the cursor on top of the text and redraw the text with a different color if necessary.
Color cursorTextColor;
IBrush cursorBrush;
Pen cursorPen;
float cursorPositionYTop = inputTextY + 1;
float cursorPositionYBottom = cursorPositionYTop + _inputTextFontSize + 1;
float cursorPositionXLeft;
float cursorPositionXRight;
bool cursorVisible = false;
if (state.CursorBegin != state.CursorEnd)
{
Debug.Assert(state.InputText.Length > 0);
cursorTextColor = _textSelectedColor;
cursorBrush = _selectionBoxBrush;
cursorPen = _selectionBoxPen;
string textUntilBegin = state.InputText.Substring(0, state.CursorBegin);
string textUntilEnd = state.InputText.Substring(0, state.CursorEnd);
var selectionBeginRectangle = MeasureString(textUntilBegin, _inputTextFont);
var selectionEndRectangle = MeasureString(textUntilEnd, _inputTextFont);
cursorVisible = true;
cursorPositionXLeft = inputTextX + selectionBeginRectangle.Width + selectionBeginRectangle.X;
cursorPositionXRight = inputTextX + selectionEndRectangle.Width + selectionEndRectangle.X;
}
else
{
cursorTextColor = _textOverCursorColor;
cursorBrush = _cursorBrush;
cursorPen = _cursorPen;
if (state.TextBoxBlinkCounter < TextBoxBlinkThreshold)
{
// Show the blinking cursor.
int cursorBegin = Math.Min(state.InputText.Length, state.CursorBegin);
string textUntilCursor = state.InputText.Substring(0, cursorBegin);
var cursorTextRectangle = MeasureString(textUntilCursor, _inputTextFont);
cursorVisible = true;
cursorPositionXLeft = inputTextX + cursorTextRectangle.Width + cursorTextRectangle.X;
if (state.OverwriteMode)
{
// The blinking cursor is in overwrite mode so it takes the size of a character.
if (state.CursorBegin < state.InputText.Length)
{
textUntilCursor = state.InputText.Substring(0, cursorBegin + 1);
cursorTextRectangle = MeasureString(textUntilCursor, _inputTextFont);
cursorPositionXRight = inputTextX + cursorTextRectangle.Width + cursorTextRectangle.X;
}
else
{
cursorPositionXRight = cursorPositionXLeft + _inputTextFontSize / 2;
}
}
else
{
// The blinking cursor is in insert mode so it is only a line.
cursorPositionXRight = cursorPositionXLeft;
}
}
else
{
cursorPositionXLeft = inputTextX;
cursorPositionXRight = inputTextX;
}
}
if (state.TypingEnabled && cursorVisible)
{
float cursorWidth = cursorPositionXRight - cursorPositionXLeft;
float cursorHeight = cursorPositionYBottom - cursorPositionYTop;
if (cursorWidth == 0)
{
PointF[] points = new PointF[]
{
new PointF(cursorPositionXLeft, cursorPositionYTop),
new PointF(cursorPositionXLeft, cursorPositionYBottom),
};
context.DrawLines(cursorPen, points);
}
else
{
var cursorRectangle = new RectangleF(cursorPositionXLeft, cursorPositionYTop, cursorWidth, cursorHeight);
context.Draw(cursorPen, cursorRectangle);
context.Fill(cursorBrush, cursorRectangle);
Image <Argb32> textOverCursor = new Image <Argb32>((int)cursorRectangle.Width, (int)cursorRectangle.Height);
textOverCursor.Mutate(context =>
{
var textRelativePosition = new PointF(inputTextPosition.X - cursorRectangle.X, inputTextPosition.Y - cursorRectangle.Y);
context.DrawText(state.InputText, _inputTextFont, cursorTextColor, textRelativePosition);
});
var cursorPosition = new Point((int)cursorRectangle.X, (int)cursorRectangle.Y);
context.DrawImage(textOverCursor, cursorPosition, 1);
}
}
else if (!state.TypingEnabled)
{
// Just draw a semi-transparent rectangle on top to fade the component with the background.
// TODO (caian): This will not work if one decides to add make background semi-transparent as well.
context.Fill(_disabledBrush, boundRectangle);
}
}
