public override void OnMouseDown(MouseEventArgs e)
{
if (TilesetSelection == Rectangle.Empty || World.IsDragging || e.Button != MouseButtons.Left)
{
return;
}
ChangesUndo = new TileChangesList(World.SelectedLayer);
ChangesRedo = new TileChangesList(World.SelectedLayer);
Point location = RelativePoint(e.Location);
// draw a uniform line if shift is pressed when clicked
if (lastRenderedPoint != PointNull && (Control.ModifierKeys & Keys.Shift) == Keys.Shift)
{
renderUniformLine(lastRenderedPoint, location);
}
else
{
renderPointCentered(location, true);
}
lastMouseMove = location;
mouseDown = true;
}
/// <summary>
/// Renders the tileset selection to the world centered
/// on given point
/// </summary>
/// <param name="point"> Point origin </param>
/// <param name="invalidate"> Flag for invalidating the world canvas after done calculating changes </param>
protected void renderPointCentered(Point point, bool invalidate = false)
{
//cast changes as changes list
TileChangesList undo = ChangesUndo as TileChangesList,
redo = ChangesRedo as TileChangesList;
int width = TilesetSelection.Width / TileSize.Width,
height = TilesetSelection.Height / TileSize.Height,
offsetX = (int)Math.Floor((float)width / 2),
offsetY = (int)Math.Floor((float)height / 2);
bool checkRectangle = World.SelectionRectangle != Rectangle.Empty;
for (int x = point.X, sx = 0; x < point.X + width; x++, sx++)
{
for (int y = point.Y, sy = 0; y < point.Y + height; y++, sy++)
{
Point change = new Point(x - offsetX, y - offsetY);
if (!World.PointInWorld(change.X, change.Y))
{
continue;
}
if (checkRectangle && !World.SelectionRectangle.Contains(change))
{
continue;
}
if (undo != null && !undo.ContainsKey(change))
{
undo[change] = World.GetTile(change);
}
WorldTile tile = TileFromSelectionOffset(sx, sy);
World.SetTile(change.X, change.Y, tile, World.SelectedLayer);
if (redo != null)
{
redo[change] = tile;
}
}
}
lastRenderedPoint = point;
if (invalidate)
{
World.InvalidateCanvas();
}
}
/// <summary>
/// Generic history callback delegate specifically for tile based tools
/// </summary>
/// <param name="obj"> History arguement</param>
protected virtual void ApplyTileChanges(HistoryAction action, object obj)
{
lastRenderedPoint = PointNull;
TileChangesList changes = (TileChangesList)obj;
foreach (var change in changes)
{
World.SetTile(change.Key.X, change.Key.Y, change.Value, changes.Layer);
}
World.SelectLayer(changes.Layer);
}
public override void OnMouseDown(MouseEventArgs e)
{
if (TilesetSelection == Rectangle.Empty || World.IsDragging || e.Button != MouseButtons.Left)
return;
ChangesUndo = new TileChangesList(World.SelectedLayer);
ChangesRedo = new TileChangesList(World.SelectedLayer);
Point location = RelativePoint(e.Location);
// draw a uniform line if shift is pressed when clicked
if (lastRenderedPoint != PointNull && (Control.ModifierKeys & Keys.Shift) == Keys.Shift)
{
renderUniformLine(lastRenderedPoint, location);
}
else
{
renderPointCentered(location, true);
}
lastMouseMove = location;
mouseDown = true;
}