Fix issue with drawing not being drawn when opening from central button.
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		@@ -156,7 +156,7 @@ public class MainWindow extends JFrame {
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        this.currentPalette = this.basicPalette;
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        wccPanel = new AlgorithmPanel(this, WeaklyConnectedComponentsAlgorithm.class,
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                "Weakly-Connected Components", new String[] {}, false, false);
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                "Weakly-Connected Components", new String[]{}, false, false);
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        wccPanel.addStartActionListener(new ActionListener() {
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            @Override
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            public void actionPerformed(ActionEvent e) {
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@@ -201,7 +201,7 @@ public class MainWindow extends JFrame {
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        });
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        spPanel = new AlgorithmPanel(this, ShortestPathAlgorithm.class, "Shortest-Path",
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                new String[] { "Origin", "Destination" }, true, true);
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                new String[]{ "Origin", "Destination" }, true, true);
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        spPanel.addStartActionListener(new ActionListener() {
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            @Override
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            public void actionPerformed(ActionEvent e) {
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@@ -254,12 +254,12 @@ public class MainWindow extends JFrame {
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        });
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        cpPanel = new AlgorithmPanel(
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                this, CarPoolingAlgorithm.class, "Car-Pooling", new String[] { "Origin Car",
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                this, CarPoolingAlgorithm.class, "Car-Pooling", new String[]{ "Origin Car",
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                        "Origin Pedestrian", "Destination Car", "Destination Pedestrian" },
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                true, true);
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        psPanel = new AlgorithmPanel(this, PackageSwitchAlgorithm.class, "Car-Pooling",
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                new String[] { "Oribin A", "Origin B", "Destination A", "Destination B" }, true,
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                new String[]{ "Oribin A", "Origin B", "Destination A", "Destination B" }, true,
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                true);
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        // add algorithm panels
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@@ -465,6 +465,9 @@ public class MainWindow extends JFrame {
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        if (!(mainPanel.getLeftComponent() instanceof Drawing)) {
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            mainPanel.setLeftComponent((Component) this.drawing);
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            mainPanel.setDividerLocation(oldLocation);
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            // Need to re-validate or the drawing will not have the
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            // correct size prior to drawing, which can cause issue.
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            this.revalidate();
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        }
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        boolean isNewGraph = newClass == null;
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@@ -510,6 +513,7 @@ public class MainWindow extends JFrame {
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                notifyDrawingLoaded(basicDrawing, mapViewDrawing);
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                drawing.clear();
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                isNewGraph = true;
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                mainPanel.revalidate();
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            }
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            if (isNewGraph) {
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                drawing.clear();
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