// OnPaint event handler.
// in:
// sender object that has sent the event
// e paint event arguments
private void OnPaintHandler(object sender, PaintEventArgs e)
{
// Full redraw: draw complete collection of finished strokes and
// also all the strokes that are currently in drawing.
FinishedStrokes.Draw(e.Graphics);
ActiveStrokes.Draw(e.Graphics);
}
// Touch up event handler.
// Finishes the stroke and moves it to the collection of finished strokes.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchUpHandler(object sender, WMTouchEventArgs e)
{
// Find the stroke in the collection of the strokes in drawing
// and remove it from this collection.
Stroke stroke = ActiveStrokes.Remove(e.Id);
Debug.Assert(stroke != null);
// Add this stroke to the collection of finished strokes.
FinishedStrokes.Add(stroke);
// Request full redraw.
Invalidate();
}
// Touch move event handler.
// Adds a point to the active stroke and draws new stroke segment.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchMoveHandler(object sender, WMTouchEventArgs e)
{
// Find the stroke in the collection of the strokes in drawing.
Stroke stroke = ActiveStrokes.Get(e.Id);
Debug.Assert(stroke != null);
// Add contact point to the stroke
stroke.Add(new Point(e.LocationX, e.LocationY));
// Partial redraw: only the last line segment
Graphics g = this.CreateGraphics();
stroke.DrawLast(g);
}
// Touch down event handler.
// Starts a new stroke and assigns a color to it.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchDownHandler(object sender, WMTouchEventArgs e)
{
// We have just started a new stroke, which must have an ID value unique
// among all the strokes currently being drawn. Check if there is a stroke
// with the same ID in the collection of the strokes in drawing.
Debug.Assert(ActiveStrokes.Get(e.Id) == null);
// Create new stroke, add point and assign a color to it.
Stroke newStroke = new Stroke();
newStroke.Color = touchColor.GetColor(e.IsPrimaryContact);
newStroke.Id = e.Id;
// Add new stroke to the collection of strokes in drawing.
ActiveStrokes.Add(newStroke);
}
// Touch move event handler.
// Adds a point to the active stroke and draws new stroke segment.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchMoveHandler(object sender, WMTouchEventArgs e)
{
// Find the stroke in the collection of the strokes in drawing.
Stroke stroke = ActiveStrokes.Get(e.Id);
Debug.Assert(stroke != null);
// Add contact point to the stroke
stroke.Add(new Point(e.LocationX, e.LocationY));
#if (DEBUG_XY)
label5.Text = "TOUCH MOVING";
richTextBox1.AppendText("x: " + e.LocationX.ToString() + " ");
richTextBox1.AppendText("y: " + e.LocationY.ToString() + "\n");
#endif
// Partial redraw: only the last line segment
Graphics g = this.CreateGraphics();
stroke.DrawLast(g);
}
// Touch up event handler.
// Finishes the stroke and moves it to the collection of finished strokes.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchUpHandler(object sender, WMTouchEventArgs e)
{
// Find the stroke in the collection of the strokes in drawing
// and remove it from this collection.
Stroke stroke = ActiveStrokes.Remove(e.Id);
Debug.Assert(stroke != null);
// Add this stroke to the collection of finished strokes.
FinishedStrokes.Add(stroke);
//#if (DEBUG_XY)
label5.Text = "TOUCH UP";
richTextBox1.AppendText("x: " + e.LocationX.ToString() + " ");
richTextBox1.AppendText("y: " + e.LocationY.ToString() + "\n");
//#endif
BoundaryCheck(0, e);
// Request full redraw.
Invalidate();
}
// Touch down event handler.
// Starts a new stroke and assigns a color to it.
// in:
// sender object that has sent the event
// e touch event arguments
private void OnTouchDownHandler(object sender, WMTouchEventArgs e)
{
// We have just started a new stroke, which must have an ID value unique
// among all the strokes currently being drawn. Check if there is a stroke
// with the same ID in the collection of the strokes in drawing.
Debug.Assert(ActiveStrokes.Get(e.Id) == null);
// Create new stroke, add point and assign a color to it.
Stroke newStroke = new Stroke();
newStroke.Color = touchColor.GetColor(e.IsPrimaryContact);
newStroke.Id = e.Id;
// Add new stroke to the collection of strokes in drawing.
ActiveStrokes.Add(newStroke);
//#if (DEBUG_XY)
label5.Text = "TOUCH DOWN";
richTextBox1.AppendText("x: " + e.LocationX.ToString() + " ");
richTextBox1.AppendText("y: " + e.LocationY.ToString() + "\n");
//#endif
BoundaryCheck(1, e);
}
