How to use

IGraphicsBackgroundListener

in

jsettlers.common.map

public final void setHeightAt(short x, short y, byte height) {
  this.heightGrid[x + y * width] = height;
  backgroundListener.backgroundShapeChangedAt(x, y);
}

public void flattenAndChangeHeightTowards(int x, int y, byte targetHeight) {
  final int index = x + y * width;
  this.heightGrid[index] += Math.signum(targetHeight - this.heightGrid[index]);
  this.landscapeGrid[index] = ELandscapeType.FLATTENED.ordinal;
  this.temporaryFlatened[index] = Byte.MAX_VALUE; // cancel the flattening
  backgroundListener.backgroundShapeChangedAt(x, y);
}

public final void setLandscapeTypeAt(int x, int y, ELandscapeType landscapeType) {
  if (landscapeType == ELandscapeType.FLATTENED && this.landscapeGrid[x + y * width] != ELandscapeType.FLATTENED.ordinal) {
    flattenedResetter.addPosition(x, y);
  }
  this.landscapeGrid[x + y * width] = landscapeType.ordinal;
  backgroundListener.backgroundShapeChangedAt(x, y);
}

public void setHeight(int x, int y, int height) {
  byte safeHeight;
  if (height >= Byte.MAX_VALUE) {
    safeHeight = Byte.MAX_VALUE;
  } else if (height <= 0) {
    safeHeight = 0;
  } else {
    safeHeight = (byte) height;
  }
  undoDelta.addHeightChange(x, y, heights[x][y]);
  heights[x][y] = safeHeight;
  if (backgroundListener != null) {
    backgroundListener.backgroundShapeChangedAt((short) x, (short) y);
  }
}

private boolean setLandscape(int x, int y, ELandscapeType type) {
  if (objects[x][y] != null) {
    if (!landscapeAllowsObjects(type)) {
      return false;
    }
    if (objects[x][y] instanceof LandscapeConstraint) {
      LandscapeConstraint constraint = (LandscapeConstraint) objects[x][y];
      if (!constraint.getAllowedLandscapes().contains(type)) {
        return false;
      }
    }
  }
  undoDelta.addLandscapeChange(x, y, landscapes[x][y]);
  landscapes[x][y] = type;
  if (backgroundListener != null) {
    backgroundListener.backgroundShapeChangedAt((short) x, (short) y);
  }
  return true;
}

inverse.addHeightChange(c.x, c.y, heights[c.x][c.y]);
heights[c.x][c.y] = c.height;
backgroundListener.backgroundShapeChangedAt(c.x, c.y);
c = c.next;
inverse.addLandscapeChange(cl.x, cl.y, landscapes[cl.x][cl.y]);
landscapes[cl.x][cl.y] = cl.landscape;
backgroundListener.backgroundShapeChangedAt(cl.x, cl.y);
cl = cl.next;