/*
Copyright 2012 GanttProject Team
This file is part of GanttProject, an opensource project management tool.
GanttProject is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GanttProject is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GanttProject. If not, see <http://www.gnu.org/licenses/>.
*/
package biz.ganttproject.core.chart.scene;
import biz.ganttproject.core.chart.canvas.Canvas;
/**
* This class is responsible for building a scene, which is some particular part of a chart.
* For instance, chart timeline is a scene. The process of building involves creating
* shapes on a canvas instance. When all scene builders finish their work, the
* rendering engine takes their canvases and renders their contents on the target
* device (e.g. on Graphics instance).
*
* @author dbarashev (Dmitry Barashev)
*/
public interface SceneBuilder {
/**
* Resets this builder and sets scene height, which is a height of a user-visible viewport
* of a chart
*
* @param sceneHeight
*/
void reset(int sceneHeight);
/**
* Builds a scene
*/
void build();
/**
* @return canvas instance
*/
Canvas getCanvas();
}