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reimplement multi-touch method #104

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reimplement multi-touch method #104

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2 changes: 1 addition & 1 deletion Demo.WindowsPresentation/Windows/MainWindow.xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@
</Window.Resources>
<Grid>
<GroupBox Name="mapgroup" Header="gmap" Margin="12,7,241,12" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
<src:Map x:Name="MainMap" Zoom="13" MaxZoom="24" MinZoom="1" />
<src:Map x:Name="MainMap" Zoom="13" MaxZoom="24" MinZoom="1" MultiTouchEnabled="True" />
</GroupBox>
<GroupBox HorizontalAlignment="Right" Margin="0,7,186,12" VerticalAlignment="Stretch" Header="Zoom">
<Grid>
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2 changes: 1 addition & 1 deletion Demo.WindowsPresentation/Windows/MainWindow.xaml.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ public MainWindow()
// config map
MainMap.MapProvider = GMapProviders.OpenStreetMap;
MainMap.Position = new PointLatLng(54.6961334816182, 25.2985095977783);

MainMap.TouchEnabled = false;
//MainMap.ScaleMode = ScaleModes.Dynamic;

// map events
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226 changes: 220 additions & 6 deletions GMap.NET.WindowsPresentation/GMap.NET.WindowsPresentation/GMapControl.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1913,6 +1913,219 @@ protected override void OnStylusMove(StylusEventArgs e)
}
}

private Dictionary<int, Point> movingPoints = new Dictionary<int, Point>();
protected override void OnTouchDown(TouchEventArgs e)
{
base.OnTouchDown(e);
if (MultiTouchEnabled)
{
TouchPoint touchpoint = e.GetTouchPoint(this);
Point point = new Point();
point.X = touchpoint.Position.X;
point.Y = touchpoint.Position.Y;
movingPoints[e.TouchDevice.Id] = point;
if (movingPoints.Count == 0)
{
if (MapScaleTransform != null)
{
point = MapScaleTransform.Inverse.Transform(point);
}

point = ApplyRotationInversion(point.X, point.Y);

Core.mouseDown.X = (int)point.X;
Core.mouseDown.Y = (int)point.Y;

InvalidateVisual();
}
}
}

private double calcdist(double x1, double y1, double x2, double y2)
{
return Math.Sqrt(Math.Pow(x1 - x2, 2) + Math.Pow(y1 - y2, 2));
}
int change = 0;
protected override void OnTouchMove(TouchEventArgs e)
{
base.OnTouchMove(e);
if (MultiTouchEnabled)
{
if (movingPoints.Count == 1)
{
if (movingPoints.Keys.Contains(e.TouchDevice.Id))
{
if ((e.Timestamp & Int32.MaxValue) - onMouseUpTimestamp < 55)
{
Debug.WriteLine("OnMouseMove skipped: " + ((e.Timestamp & Int32.MaxValue) - onMouseUpTimestamp) + "ms");
return;
}

if (!Core.IsDragging)
{
TouchPoint touchpoint = e.GetTouchPoint(this);
Point p = new Point();
p.X = touchpoint.Position.X;
p.Y = touchpoint.Position.Y;

if (MapScaleTransform != null)
{
p = MapScaleTransform.Inverse.Transform(p);
}

p = ApplyRotationInversion(p.X, p.Y);

// cursor has moved beyond drag tolerance
if (Math.Abs(p.X - movingPoints[e.TouchDevice.Id].X) * 2 >= SystemParameters.MinimumHorizontalDragDistance || Math.Abs(p.Y - movingPoints[e.TouchDevice.Id].Y) * 2 >= SystemParameters.MinimumVerticalDragDistance)
{
GPoint gp = new GPoint();
gp.X = (int)movingPoints[e.TouchDevice.Id].X;
gp.Y = (int)movingPoints[e.TouchDevice.Id].Y;
Core.BeginDrag(gp);
}
}

if (Core.IsDragging)
{
if (!isDragging)
{
isDragging = true;
Debug.WriteLine("IsDragging = " + isDragging);
cursorBefore = Cursor;
Cursor = Cursors.SizeAll;
Mouse.Capture(this);
}

if (BoundsOfMap.HasValue && !BoundsOfMap.Value.Contains(Position))
{
// ...
}
else
{
TouchPoint touchpoint = e.GetTouchPoint(this);
Point p = new Point();
p.X = touchpoint.Position.X;
p.Y = touchpoint.Position.Y;

if (MapScaleTransform != null)
{
p = MapScaleTransform.Inverse.Transform(p);
}

p = ApplyRotationInversion(p.X, p.Y);

Core.mouseCurrent.X = (int)p.X;
Core.mouseCurrent.Y = (int)p.Y;
{
Core.Drag(Core.mouseCurrent);
}

if (IsRotated)
{
ForceUpdateOverlays();
}
else
{
UpdateMarkersOffset();
}
}
InvalidateVisual();
}
}
}
else if (movingPoints.Count == 2)
{
if (movingPoints.Keys.Contains(e.TouchDevice.Id))
{
Point point1 = new Point();
Point point2 = new Point();
double nowdistance = 0;
double predistance = 0;
int count = 0;
foreach (var item in movingPoints)
{
if (count == 0)
point1 = item.Value;
else
point2 = item.Value;
count++;
}
predistance = calcdist(point1.X, point1.Y, point2.X, point2.Y);
TouchPoint touchpoint = e.GetTouchPoint(this);
Point npoint = new Point();
npoint.X = touchpoint.Position.X;
npoint.Y = touchpoint.Position.Y;
if (movingPoints[e.TouchDevice.Id] == point1)
{
nowdistance = calcdist(npoint.X, npoint.Y, point2.X, point2.Y);
}
else
{
nowdistance = calcdist(npoint.X, npoint.Y, point1.X, point1.Y);
}
//movingPoints[e.TouchDevice.Id] = npoint;
if (change <= 2)
{
if (nowdistance - predistance > 10)
{
Zoom += 0.5;
change++;
}
else if (nowdistance - predistance < -10)
{
Zoom -= 0.5;
change++;
}
}
}
}
}
}

protected override void OnTouchUp(TouchEventArgs e)
{
base.OnTouchUp(e);
if (MultiTouchEnabled && !TouchEnabled)
{
change = 0;
movingPoints.Remove(e.TouchDevice.Id);
if (true) // add bool to starting for single touch vs multi touch
{
if (isSelected)
{
isSelected = false;
}

if (Core.IsDragging)
{
if (isDragging)
{
onMouseUpTimestamp = e.Timestamp & Int32.MaxValue;
isDragging = false;
Debug.WriteLine("IsDragging = " + isDragging);
Cursor = cursorBefore;
Mouse.Capture(null);
}
Core.EndDrag();

if (BoundsOfMap.HasValue && !BoundsOfMap.Value.Contains(Position))
{
if (Core.LastLocationInBounds.HasValue)
{
Position = Core.LastLocationInBounds.Value;
}
}
}
else
{
Core.mouseDown = GPoint.Empty;
InvalidateVisual();
}
}
}
}

/*
/// <summary>
/// Called when the <see cref="E:System.Windows.UIElement.ManipulationDelta" /> event occurs.
/// </summary>
Expand Down Expand Up @@ -2049,15 +2262,16 @@ protected override void OnManipulationCompleted(ManipulationCompletedEventArgs e
}
}
}
*/
#endregion

#endregion

#region IGControl Members
#region IGControl Members

/// <summary>
/// Call it to empty tile cache & reload tiles
/// </summary>
public void ReloadMap()
/// <summary>
/// Call it to empty tile cache & reload tiles
/// </summary>
public void ReloadMap()
{
Core.ReloadMap();
}
Expand Down