public async Task <SnapsCoordinate> GetTappedCoordinateAsync()
{
enableTouch();
SnapsCoordinate tappedPositionResult = new SnapsCoordinate();
AutoResetEvent GetTappedPositionCompleteEvent = new AutoResetEvent(false);
var tcs = new TaskCompletionSource <object>();
TappedEventHandler lambda = (s, e) =>
{
// Get the position relative to the graphics canvas as this
// is the one we will be drawing
Point p = e.GetPosition(manager.DisplayGrid);// (Grid) s);
tappedPositionResult.XValue = (int)Math.Round(p.X);
tappedPositionResult.YValue = (int)Math.Round(p.Y);
tcs.TrySetResult(null);
};
try
{
this.Tapped += lambda;
await tcs.Task;
}
finally
{
this.Tapped -= lambda;
disableTouch();
}
return(tappedPositionResult);
}
public void StartProgram()
{
while (true)
{
SnapsCoordinate drawPos = SnapsEngine.GetDraggedCoordinate();
SnapsEngine.DrawDot(pos: drawPos, width: 10);
}
}
public void StartProgram()
{
while (true)
{
SnapsCoordinate tappedPos = SnapsEngine.GetTappedCoordinate();
SnapsEngine.DrawDot(tappedPos, 20);
}
}
public void StartProgram()
{
SnapsCoordinate origin = new SnapsCoordinate(x: 0, y: 0);
SnapsEngine.SetDrawingColor(red: 255, green: 0, blue: 0);
while (true)
{
SnapsCoordinate lineEnd = SnapsEngine.GetTappedCoordinate();
SnapsEngine.DrawLine(p1: origin, p2: lineEnd);
}
}
void DrawDotsUntilDrawInLeftCorner()
{
while (true)
{
SnapsCoordinate drawPos = SnapsEngine.GetDraggedCoordinate();
if (drawPos.XValue < 50 && drawPos.YValue < 50)
{
break;
}
SnapsEngine.DrawDot(pos: drawPos, width: 20);
}
}
public SnapsCoordinate GetTappedCoordinate()
{
SnapsCoordinate tappedPositionResult = new SnapsCoordinate();
AutoResetEvent GetTappedCompleteEvent = new AutoResetEvent(false);
manager.InvokeOnUIThread(
async() =>
{
tappedPositionResult = await GetTappedCoordinateAsync();
GetTappedCompleteEvent.Set();
});
GetTappedCompleteEvent.WaitOne();
return(tappedPositionResult);
}
public void StartProgram()
{
while (true)
{
SnapsCoordinate drawPos = SnapsEngine.GetDraggedCoordinate();
if (drawPos.XValue < 10 && drawPos.YValue < 10)
{
SnapsEngine.ClearGraphics();
}
else
{
SnapsEngine.DrawDot(pos: drawPos, width: 20);
}
}
}
public void StartProgram()
{
SnapsCoordinate screenSize = SnapsEngine.GetScreenSize();
SnapsCoordinate center;
center.XValue = screenSize.XValue / 2;
center.YValue = screenSize.YValue / 2;
SnapsEngine.SetDrawingColor(red: 255, green: 0, blue: 0);
while (true)
{
SnapsCoordinate lineEnd = SnapsEngine.GetTappedCoordinate();
SnapsEngine.DrawLine(center, lineEnd);
}
}
public void StartProgram()
{
SnapsEngine.SetBackgroundColor(red: 100, green: 100, blue: 100);
SnapsCoordinate pos = new SnapsCoordinate(100, 200);
SnapsEngine.SetDrawingColor(red: 255, green: 255, blue: 255);
SnapsEngine.DrawDot(pos: pos, width: 100);
SnapsEngine.SetDrawingColor(red: 0, green: 0, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 80);
SnapsEngine.SetDrawingColor(red: 0, green: 0, blue: 255);
SnapsEngine.DrawDot(pos: pos, width: 60);
SnapsEngine.SetDrawingColor(red: 255, green: 0, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 40);
SnapsEngine.SetDrawingColor(red: 255, green: 255, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 20);
}
public SnapsCoordinate GetScreenSize()
{
AutoResetEvent getSizeCompletedEvent = new AutoResetEvent(false);
SnapsCoordinate position = new SnapsCoordinate();
manager.InvokeOnUIThread(
() =>
{
position.XValue = (int)this.ActualWidth;
position.YValue = (int)this.ActualHeight;
getSizeCompletedEvent.Set();
}
);
getSizeCompletedEvent.WaitOne();
return(position);
}
public void StartProgram()
{
// Set the screen color to gray
SnapsEngine.SetBackgroundColor(red: 100, green: 100, blue: 100);
// Stop the control menu being displayed when the program finishes
SnapsEngine.DisplayControMenuAtProgramEnd = false;
SnapsCoordinate pos = new SnapsCoordinate(100, 200);
SnapsEngine.SetDrawingColor(red: 255, green: 255, blue: 255);
SnapsEngine.DrawDot(pos: pos, width: 100);
SnapsEngine.SetDrawingColor(red: 0, green: 0, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 80);
SnapsEngine.SetDrawingColor(red: 0, green: 0, blue: 255);
SnapsEngine.DrawDot(pos: pos, width: 60);
SnapsEngine.SetDrawingColor(red: 255, green: 0, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 40);
SnapsEngine.SetDrawingColor(red: 255, green: 255, blue: 0);
SnapsEngine.DrawDot(pos: pos, width: 20);
}
public void StartProgram()
{
PenModes penType;
penType = PenModes.SquarePen;
// Draw a pallette block for selecting a square pen
SnapsEngine.SetDrawingColor(SnapsColor.Red);
// draw the block background
SnapsEngine.DrawBlock(x: 0, y: 0, width: 50, height: 50);
SnapsEngine.SetDrawingColor(SnapsColor.White);
// draw a white block to indicate the square pen
SnapsEngine.DrawBlock(x: 15, y: 15, width: 20, height: 20);
// Draw a pallette block for selecting a round pen
SnapsEngine.SetDrawingColor(SnapsColor.Red);
// draw the block background
SnapsEngine.DrawBlock(x: 52, y: 0, width: 50, height: 50);
SnapsEngine.SetDrawingColor(SnapsColor.White);
// draw a white dot to indicate the round pen
SnapsEngine.DrawDot(x: 77, y: 25, width: 20);
// Draw a pallette block for selecting the "erase" pen
SnapsEngine.SetDrawingColor(SnapsColor.Red);
// draw the block background
SnapsEngine.DrawBlock(x: 104, y: 0, width: 50, height: 50);
SnapsEngine.SetDrawingColor(SnapsColor.White);
// draw an X that indicates "erase"
SnapsEngine.DrawLine(x1: 104, y1: 0, x2: 154, y2: 50);
SnapsEngine.DrawLine(x1: 104, y1: 50, x2: 154, y2: 0);
SnapsColor backgroundColor = SnapsColor.White;
SnapsColor drawColor = SnapsColor.Black;
while (true)
{
SnapsCoordinate drawPos = SnapsEngine.GetDraggedCoordinate();
// See if the draw position is inside the square pen pallette item
if (drawPos.XValue > 0 && drawPos.XValue < 50 &&
drawPos.YValue > 0 && drawPos.YValue < 50)
{
// in the square pen area
penType = PenModes.SquarePen;
continue; // go round the loop again
}
// See if the draw position is inside the round pen pallette item
if (drawPos.XValue > 52 && drawPos.XValue < 102 &&
drawPos.YValue > 0 && drawPos.YValue < 50)
{
// in the round pen area
penType = PenModes.RoundPen;
continue; // go round the loop again
}
// See if the draw position is inside the erase pen pallette item
if (drawPos.XValue > 104 && drawPos.XValue < 154 &&
drawPos.YValue > 0 && drawPos.YValue < 50)
{
// in the erase pen area
penType = PenModes.ErasePen;
continue; // go round the loop again
}
switch (penType)
{
case PenModes.RoundPen:
SnapsEngine.SetDrawingColor(drawColor);
SnapsEngine.DrawDot(drawPos, 20);
break;
case PenModes.SquarePen:
SnapsEngine.SetDrawingColor(drawColor);
SnapsEngine.DrawBlock(drawPos.XValue, drawPos.YValue, 20, 20);
break;
case PenModes.ErasePen:
SnapsEngine.SetDrawingColor(backgroundColor);
SnapsEngine.DrawBlock(drawPos.XValue, drawPos.YValue, 20, 20);
break;
}
}
}
public async Task <SnapsCoordinate> GetDraggedCoordinateAsync()
{
enableTouch();
SnapsCoordinate draggedPositionResult = new SnapsCoordinate();
AutoResetEvent GetDraggedPositionCompleteEvent = new AutoResetEvent(false);
var tcs = new TaskCompletionSource <object>();
TappedEventHandler pointerTappedHandler = (s, e) =>
{
// Get the position relative to the graphics canvas as this
// is the one we will be drawing
Point p = e.GetPosition(manager.DisplayGrid);// (Grid) s);
draggedPositionResult.XValue = (int)Math.Round(p.X);
draggedPositionResult.YValue = (int)Math.Round(p.Y);
tcs.TrySetResult(null);
};
PointerEventHandler pointerMovedHandler = (s, e) =>
{
bool doDraw = false;
// Get the position relative to the graphics canvas as this
// is the one we will be drawing
PointerPoint p = e.GetCurrentPoint(this);// (Grid) s);
switch (p.PointerDevice.PointerDeviceType)
{
case Windows.Devices.Input.PointerDeviceType.Mouse:
if (p.Properties.IsLeftButtonPressed)
{
doDraw = true;
}
break;
case Windows.Devices.Input.PointerDeviceType.Pen:
if (p.Properties.Pressure > 0)
{
doDraw = true;
}
break;
case Windows.Devices.Input.PointerDeviceType.Touch:
doDraw = true;
break;
}
if (doDraw)
{
draggedPositionResult.XValue = (int)Math.Round(p.RawPosition.X);
draggedPositionResult.YValue = (int)Math.Round(p.RawPosition.Y);
tcs.TrySetResult(null);
}
};
try
{
this.Tapped += pointerTappedHandler;
this.PointerMoved += pointerMovedHandler;
await tcs.Task;
}
finally
{
this.Tapped -= pointerTappedHandler;
this.PointerMoved -= pointerMovedHandler;
disableTouch();
}
return(draggedPositionResult);
}
public void DrawLine(SnapsCoordinate p1, SnapsCoordinate p2)
{
graphicsCanvas.DrawLine(p1.XValue, p1.YValue, p2.XValue, p2.YValue);
}
public void DrawDot(SnapsCoordinate pos, int width)
{
graphicsCanvas.DrawDot(pos.XValue, pos.YValue, width);
}
