// Calculates the maximum zoom level, with which both coordinates still fit into the given size
public static int GetOptimalZoomLevel(Size size, BoundingBoxWGS84 box)
{
return GetOptimalZoomLevel(size, box.West, box.North, box.East, box.South);
}
private void MapPanel_MouseUp(object sender, MouseEventArgs e)
{
if(e.Button!=MouseButtons.Left) return;
switch(CurrentAction)
{
case Action.Selection:
{
PointD centerTileCoord=GetTileIndex(ZoomLevel, X, Y);
PointD startMouseTileCoord=centerTileCoord;
startMouseTileCoord.X+=(selectionStartPosX-ClientSize.Width/2.0)/TileSize.Width;
startMouseTileCoord.Y+=(selectionStartPosY-ClientSize.Height/2.0)/TileSize.Height;
PointD endMouseTileCoord=centerTileCoord;
endMouseTileCoord.X+=(e.X-ClientSize.Width/2.0)/TileSize.Width;
endMouseTileCoord.Y+=(e.Y-ClientSize.Height/2.0)/TileSize.Height;
PointD startMouseCoord=GetCoordinates(ZoomLevel, startMouseTileCoord.X, startMouseTileCoord.Y);
PointD endMouseCoord=GetCoordinates(ZoomLevel, endMouseTileCoord.X, endMouseTileCoord.Y);
MouseXWGS84=endMouseCoord.X;
MouseYWGS84=endMouseCoord.Y;
Selection=new BoundingBoxWGS84(startMouseCoord.X, startMouseCoord.Y, endMouseCoord.X, endMouseCoord.Y, MaxYCoordinate);
CurrentAction=Action.None;
selectionStartPosX=selectionStartPosY=0;
selectionDragPosX=selectionDragPosY=0;
Invalidate();
if(SelectionChanged!=null) SelectionChanged(this, Selection);
}
break;
case Action.Move:
{
moveDeltaX=moveStartPosX-e.X;
moveDeltaY=moveStartPosY-e.Y;
PointD tb=GetTileIndex(ZoomLevel, X, Y);
tb.X+=(double)moveDeltaX/TileSize.Width;
tb.Y+=(double)moveDeltaY/TileSize.Height;
PointD coord=GetCoordinates(ZoomLevel, tb.X, tb.Y);
X=coord.X;
Y=coord.Y;
CurrentAction=Action.None;
moveStartPosX=moveStartPosY=0;
moveDeltaX=moveDeltaY=0;
Invalidate();
if(PositionChanged!=null) PositionChanged(this, X, Y);
if(!wasMoveDrag&&NonDragingMouseClick!=null) NonDragingMouseClick(this, MouseXWGS84, MouseYWGS84);
}
break;
case Action.SelectionMove:
case Action.SelectionSizeWest:
case Action.SelectionSizeNorth:
case Action.SelectionSizeEast:
case Action.SelectionSizeSouth:
{
PointD selectionNWTileCoord=GetTileIndex(ZoomLevel, Selection.West, Selection.North);
PointD selectionSETileCoord=GetTileIndex(ZoomLevel, Selection.East, Selection.South);
PointD startMouseTileCoord=selectionNWTileCoord;
if(CurrentAction==Action.SelectionSizeWest||CurrentAction==Action.SelectionMove)
startMouseTileCoord.X+=((double)e.X-selectionStartPosX)/TileSize.Width;
if(CurrentAction==Action.SelectionSizeNorth||CurrentAction==Action.SelectionMove)
startMouseTileCoord.Y+=((double)e.Y-selectionStartPosY)/TileSize.Height;
PointD endMouseTileCoord=selectionSETileCoord;
if(CurrentAction==Action.SelectionSizeEast||CurrentAction==Action.SelectionMove)
endMouseTileCoord.X+=((double)e.X-selectionStartPosX)/TileSize.Width;
if(CurrentAction==Action.SelectionSizeSouth||CurrentAction==Action.SelectionMove)
endMouseTileCoord.Y+=((double)e.Y-selectionStartPosY)/TileSize.Height;
PointD startMouseCoord=GetCoordinates(ZoomLevel, startMouseTileCoord.X, startMouseTileCoord.Y);
PointD endMouseCoord=GetCoordinates(ZoomLevel, endMouseTileCoord.X, endMouseTileCoord.Y);
PointD mouseCoord=GetCoordinates(ZoomLevel, e.X, e.Y);
MouseXWGS84=mouseCoord.X;
MouseYWGS84=mouseCoord.Y;
Selection=new BoundingBoxWGS84(startMouseCoord.X, startMouseCoord.Y, endMouseCoord.X, endMouseCoord.Y, MaxYCoordinate);
CurrentAction=Action.None;
selectionStartPosX=selectionStartPosY=0;
selectionDragPosX=selectionDragPosY=0;
Invalidate();
if(SelectionChanged!=null) SelectionChanged(this, Selection);
}
break;
}
}
public void ZoomToBoundingBox(BoundingBoxWGS84 bbox)
{
if(bbox==null) return;
int zoomLevel=GetOptimalZoomLevel(ClientSize, bbox);
ZoomLevel=zoomLevel-1;
X=(bbox.West+bbox.East)/2;
Y=(bbox.North+bbox.South)/2;
if(PositionChanged!=null) PositionChanged(this, X, Y);
}