de.slothsoft.charts

Interface Drawable

All Known Subinterfaces:

ChartPart

All Known Implementing Classes:

Axis, Border, DataPointLine, FunctionLine, Line, Title, XAxis, XYAxis, YAxis

public interface Drawable

This class represents an abstract drawable, weather it's a graph or a rectangle or something else entirely. Classes are connected like this:

Since:

0.1.0

Author:

Stef Schulz

Method Summary

Modifier and Type	Method and Description
void	addRefreshListener(RefreshListener listener) Adds a refresh listener that is called whenever this Drawable needs to be redrawn by the GUI.
void	paintOn(GraphicContext gc, PaintInstructions instructions) Paints the current content onto the graphic context.
void	removeRefreshListener(RefreshListener listener) Removes a refresh listener that was called whenever this Drawable needed to be redrawn by the GUI.

Method Detail

paintOn

void paintOn(GraphicContext gc,
             PaintInstructions instructions)

Paints the current content onto the graphic context. Checks the instructions for what to paint.

Parameters:

gc - graphic context; coordinates are relative to the Chart

instructions - additional instructions like the area to paint on

addRefreshListener

void addRefreshListener(RefreshListener listener)

Adds a refresh listener that is called whenever this Drawable needs to be redrawn by the GUI.

Parameters:

listener - a listener

removeRefreshListener

void removeRefreshListener(RefreshListener listener)

Removes a refresh listener that was called whenever this Drawable needed to be redrawn by the GUI. Does nothing if the listener was never added.

Parameters:

listener - a listener