45 lines
1.1 KiB
Java
45 lines
1.1 KiB
Java
package idraw;
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import colors.*;
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import geometry.*;
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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 void copy();
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protected native void stop();
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// MF: I need to figure out how to accomplish these two things, especially
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// stop, directly at the Scheme level w/o going thru the Java layer.
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private boolean showing = false;
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public void show() {
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if (!showing) {
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xshow();
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showing = true;
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}
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return ;
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}
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public void close() {
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xclose();
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showing = false;
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return ;
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}
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public native void xshow();
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public native void xclose();
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public native void drawCircle(Posn p, int r, IColor c);
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public native void drawDisk(Posn p, int r, IColor c);
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public native void drawRect(Posn p, int width, int height, IColor c);
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public native void drawLine(Posn p0, Posn p1, IColor c);
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public native void drawString(Posn p, String s);
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}
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