protected override void OnMouseMove(MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
if (OldMouseEventArgs == null)
{
OldMouseEventArgs = e;
OldScreenPosition = e.GetPosition(this);
return;
}
Point ScreenPosition = e.GetPosition(this);
Point newPosition = VisibleRegion.Center;
newPosition.X += (OldScreenPosition.X - ScreenPosition.X) * VisibleRegion.Downsample;
newPosition.Y -= (OldScreenPosition.Y - ScreenPosition.Y) * VisibleRegion.Downsample;
Size VisibleArea = new Size(this.ActualWidth * VisibleRegion.Downsample, this.ActualHeight * VisibleRegion.Downsample);
VisibleRegion = new VisibleRegionInfo(newPosition, VisibleArea, VisibleRegion.Downsample);
OldScreenPosition = ScreenPosition;
OldMouseEventArgs = e;
}
base.OnMouseMove(e);
}
protected override Size ArrangeOverride(Size finalSize)
{
//Tell each child where they go in the grid...
int numCells = this.NumRows * this.NumCols;
double CellWidth = finalSize.Width / NumCols;
double CellHeight = finalSize.Height / NumRows;
Trace.WriteLine("Arrange Override: " + this.NumRows.ToString() + " x " + this.NumCols.ToString());
LastValidCellHeight = CellHeight;
LastValidCellWidth = CellWidth;
int iChild = 0;
if (CenterNumber < (numCells / 2))
{
iChild = CenterNumber - (numCells / 2);
}
Debug.Assert(Children.Count <= NumRows * NumCols);
for (int iY = 0; iY < NumRows; iY++)
{
for (int iX = 0; iX < NumCols; iX++, iChild++ )
{
if (iChild < 0)
continue;
Rect childRect = new Rect(new Point(iX * CellWidth, iY * CellHeight), new Size(CellWidth, CellHeight));
if(iChild < Children.Count)
Children[iChild].Arrange(childRect);
}
}
double Aspect = LastValidCellHeight / LastValidCellWidth;
double visWidth = LastValidCellWidth * VisibleRegion.Downsample;
double visHeight = LastValidCellWidth * Aspect * VisibleRegion.Downsample;
Rect visRect = new Rect(VisibleRegion.Center.X - (visWidth / 2),
VisibleRegion.Center.Y - (visHeight / 2),
visWidth,
visHeight);
VisibleRegion = new VisibleRegionInfo(visRect, VisibleRegion.Downsample);
return finalSize;
}
protected void StepCameraDistance(float multiplier)
{
double ds = VisibleRegion.Downsample;
if (multiplier > 0)
ds *= 0.86956521739130434782608695652174;
else
ds *= 1.15;
if (ds < 0.25)
ds = 0.25;
//double Aspect = LastValidCellHeight / LastValidCellWidth;
//double visWidth = LastValidCellWidth * ds;
//double visHeight = LastValidCellWidth * Aspect * ds;
double Aspect = this.ActualHeight / this.ActualWidth;
double visWidth = this.ActualWidth * ds;
double visHeight = visWidth * Aspect;
Rect visRect = new Rect(VisibleRegion.Center.X - (visWidth / 2),
VisibleRegion.Center.Y - (visHeight / 2),
visWidth,
visHeight);
VisibleRegion = new VisibleRegionInfo(visRect, ds);
}
protected void VisibleRegionChanged(VisibleRegionInfo newValue, VisibleRegionInfo oldValue)
{
//if (oldValue.Contains(newValue) == false)
{
System.Diagnostics.Trace.WriteLine("VisibleRegionChanged");
UpdateTiles(newValue.VisibleRect, newValue.Downsample);
}
}