private void renderMap()
{
//calculating viewport
PointF centerTile = TileCoordinatesConverter.GetTileIndex(Zoom, CenterCoord);
SizeF viewportSizeInTiles = new SizeF((float)Size.Width / (float)tileManager.TileSize.Width, (float)Size.Height / (float)tileManager.TileSize.Height);
topLeftTile = new PointF(centerTile.X - viewportSizeInTiles.Width / 2.0f, centerTile.Y - viewportSizeInTiles.Height / 2.0f);
bottomRightTile = new PointF(centerTile.X + viewportSizeInTiles.Width / 2.0f, centerTile.Y + viewportSizeInTiles.Height / 2.0f);
//generate bitmap with tiles
bitmap = new Bitmap(Size.Width, Size.Height);
Graphics g = Graphics.FromImage(bitmap);
for (int x = roundDownCoordinates(topLeftTile).X; x <= roundDownCoordinates(bottomRightTile).X; x++)
{
for (int y = roundDownCoordinates(topLeftTile).Y; y <= roundDownCoordinates(bottomRightTile).Y; y++)
{
Tile tile = tileManager.GetTile(zoom, x, y);
if (tile != null)
{
g.DrawImageUnscaled(tile.Picture, getLocationForTileIndex(tile.X, tile.Y));
}
}
}
//render overlay items
foreach (OverlayItem item in overlayItems)
{
if (item.Icon != null)
{
ImageAttributes attr = new ImageAttributes();
attr.SetColorKey(item.Transparent, item.Transparent);
Point loc = getLocationForCoordinates(item.Coord);
loc.X -= item.Offset.X;
loc.Y -= item.Offset.Y;
Rectangle destRect = new Rectangle(loc, item.Icon.Size);
g.DrawImage(item.Icon, destRect, 0, 0, item.Icon.Size.Width, item.Icon.Size.Height, GraphicsUnit.Pixel, attr);
}
}
//render polygons
foreach (PointF[] pointArray in polygonItems)
{
List <Point> locArray = new List <Point>();
foreach (PointF p in pointArray)
{
locArray.Add(getLocationForCoordinates(p));
}
g.DrawPolygon(polygonPen, locArray.ToArray());
}
g.Dispose();
this.Invalidate();
displayedAreaChanged(TopLeftDisplay, BottomRightDisplay, Zoom);
}
void OpenStreetMapViewer_MouseWheel(object sender, MouseEventArgs e)
{
if (e.Delta > 0)
{
Zoom += 1;
CenterCoord = TileCoordinatesConverter.GetCoordinates(zoom, getTileCoordinatesFromLocation(e.Location));
}
if (e.Delta < 0)
{
Zoom -= 1;
}
}
private void OpenStreetMapViewer_MouseMove(object sender, MouseEventArgs e)
{
// pointed coordinate
PointF pointTile = new PointF((float)e.X / (float)tileManager.TileSize.Width + topLeftTile.X, (float)e.Y / (float)tileManager.TileSize.Height + topLeftTile.Y);
coordinatePointed(TileCoordinatesConverter.GetCoordinates(zoom, pointTile));
actMousePosition = e.Location;
//tooltip hide/ show
if (toolTip != null)
{
if (e.X < toolTip.Left || e.X > toolTip.Right || e.Y < toolTip.Top || e.Y > toolTip.Bottom)
{
removeToolTip();
}
}
else if (startedAction == ActionType.none)
{
int offset = 5;
foreach (OverlayItem item in overlayItems)
{
Point loc = getLocationForCoordinates(item.Coord);
if (loc.X >= e.X - offset &&
loc.X <= e.X + offset &&
loc.Y >= e.Y - offset &&
loc.Y <= e.Y + offset)
{
addToolTip(loc, item.ToolTip);
break;
}
}
}
// repaint
if (startedAction != ActionType.none)
{
Invalidate();
}
}
private void OpenStreetMapViewer_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (startedAction == ActionType.mark && ModifierKeys == markModifiers)
{
PointF pointTile = TileCoordinatesConverter.GetCoordinates(zoom, getTileCoordinatesFromLocation(e.Location));
float xMin = Math.Min(lastClickedCoord.X, pointTile.X);
float xMax = Math.Max(lastClickedCoord.X, pointTile.X);
float yMin = Math.Min(lastClickedCoord.Y, pointTile.Y);
float yMax = Math.Max(lastClickedCoord.Y, pointTile.Y);
TopLeftCoord = new PointF(xMin, yMax);
BottomRightCoord = new PointF(xMax, yMin);
coordinatesMarked(new PointF(xMin, yMax), new PointF(xMax, yMin));
}
if (startedAction == ActionType.move && ModifierKeys == moveModifiers)
{
PointF pointTile = TileCoordinatesConverter.GetCoordinates(zoom, getTileCoordinatesFromLocation(e.Location));
PointF diff = new PointF(lastClickedCoord.X - pointTile.X, lastClickedCoord.Y - pointTile.Y);
CenterCoord = new PointF(CenterCoord.X + diff.X, CenterCoord.Y + diff.Y);
}
}
startedAction = ActionType.none;
}
private void OpenStreetMapViewer_MouseDown(object sender, MouseEventArgs e)
{
if (startedAction == ActionType.none && e.Button == MouseButtons.Left)
{
lastClickedCoord = TileCoordinatesConverter.GetCoordinates(zoom, getTileCoordinatesFromLocation(e.Location));
lastMouseClick = e.Location;
if (ModifierKeys == markModifiers)
{
startedAction = ActionType.mark;
}
else if (ModifierKeys == moveModifiers)
{
startedAction = ActionType.move;
}
else
{
startedAction = ActionType.none;
}
}
else
{
startedAction = ActionType.none;
}
}
private void OpenStreetMapViewer_MouseClick(object sender, MouseEventArgs e)
{
coordinateClicked(TileCoordinatesConverter.GetCoordinates(zoom, getTileCoordinatesFromLocation(e.Location)));
}
private Point getLocationForCoordinates(PointF coord)
{
PointF tileIndex = TileCoordinatesConverter.GetTileIndex(Zoom, coord);
return(getLocationForTileIndex(tileIndex.X, tileIndex.Y));
}