33 lines
1.3 KiB
Java
33 lines
1.3 KiB
Java
package draw;
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public class Canvas {
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private int width = 0;
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private int height = 0;
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public Canvas(int width, int height) {
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this.width = width;
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this.height = height;
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}
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// these two are cheats:
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protected native boolean copy();
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protected native boolean stop();
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// I need to figure out how to accomplish these two things, especially stop,
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// directly at the Scheme level w/o going thru the Java layer.
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// BUG: this is actually a bug in ProfessorJ. Making these protected should
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// work just fine. Indeed, leaving off the access control qualifier should
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// work, too. (That's package protected.)
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public native boolean show();
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public native boolean close();
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public native boolean drawCircle(Posn p, int r, Color c);
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public native boolean drawDisk(Posn p, int r, Color c);
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public native boolean drawRect(Posn p, int width, int height, Color c);
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public native boolean drawLine(Posn p0, Posn p1, Color c);
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public native boolean drawString(Posn p, String s);
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public native boolean clearCircle(Posn p, int r, Color c);
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public native boolean clearDisk(Posn p, int r, Color c);
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public native boolean clearRect(Posn p, int width, int height, Color c);
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public native boolean clearLine(Posn p0, Posn p1, Color c);
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}
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