Attachment 214841 Details for Bug 253670 – Demonstrates rotate problem, and use of line attributes to fix

Demonstrates rotate problem, and use of line attributes to fix

RotateTest.java (text/x-java), 3.74 KB, created by Colin Sharples

on 2012-04-30 17:43:10 EDT

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Filename:

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Creator: Colin Sharples

Created: 2012-04-30 17:43:10 EDT

Size: 3.74 KB

patch

obsolete

>package nz.co.ctg.draw2d;
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.PaintEvent;
>import org.eclipse.swt.events.PaintListener;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.graphics.Color;
>import org.eclipse.swt.graphics.Transform;
>import org.eclipse.swt.layout.GridData;
>import org.eclipse.swt.layout.GridLayout;
>import org.eclipse.swt.layout.RowLayout;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Canvas;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Label;
>import org.eclipse.swt.widgets.Shell;
>
>public class RotateTest {
>  static int rotation = 0;
>
>  public static void main(String[] args) {
>    Display display = new Display ();
>    Shell shell = new Shell(display);
>    shell.setSize(400, 400);
>    shell.setLayout(new GridLayout(2, false));
>    Composite b = new Composite(shell, SWT.NONE);
>    b.setLayout(new RowLayout(SWT.HORIZONTAL));
>    GridData gd = new GridData();
>    gd.horizontalSpan = 2;
>    b.setLayoutData(gd);
>
>    Label l = new Label(shell, SWT.NONE);
>    l.setText("Good");
>    l = new Label(shell, SWT.NONE);
>    l.setText("Bad");
>
>    final Canvas goodCanvas = new Canvas(shell, SWT.BORDER);
>    final Canvas badCanvas = new Canvas(shell, SWT.BORDER);
>
>    Button left = new Button(b, SWT.ARROW | SWT.LEFT);
>    left.addSelectionListener(new SelectionAdapter() {
>      @Override
>      public void widgetSelected(SelectionEvent e) {
>        rotation -= 5;
>        if (rotation < 0) {
>          rotation += 360;
>        }
>        if (rotation >= 360) {
>          rotation -= 360;
>        }
>        goodCanvas.redraw();
>        badCanvas.redraw();
>      }
>    });
>    Button right = new Button(b, SWT.ARROW | SWT.RIGHT);
>    right.addSelectionListener(new SelectionAdapter() {
>      @Override
>      public void widgetSelected(SelectionEvent e) {
>        rotation += 5;
>        if (rotation < 0) {
>          rotation += 360;
>        }
>        if (rotation >= 360) {
>          rotation -= 360;
>        }
>        goodCanvas.redraw();
>        badCanvas.redraw();
>      }
>    });
>
>    gd = new GridData(SWT.FILL, SWT.FILL, true, true);
>    gd.widthHint = 200;
>    gd.heightHint = 200;
>    goodCanvas.setLayoutData(gd);
>    goodCanvas.addPaintListener(new PaintListener() {
>      @Override
>      public void paintControl(PaintEvent e) {
>        e.gc.setForeground(new Color(Display.getCurrent(), 0, 0, 0));
>        e.gc.setBackground(new Color(Display.getCurrent(), 255, 255, 255));
>        Transform transform = new Transform(Display.getCurrent());
>        transform.translate(100, 100);
>        transform.rotate(rotation);
>        e.gc.setTransform(transform);
>        e.gc.getGCData().state |= 1 << 9; // DRAW_OFFSET
>        e.gc.fillRectangle(0, 0, 20, 20);
>        e.gc.drawRectangle(0, 0, 20, 20);
>      }
>    });
>
>    gd = new GridData(SWT.FILL, SWT.FILL, true, true);
>    gd.widthHint = 200;
>    gd.heightHint = 200;
>    badCanvas.setLayoutData(gd);
>    badCanvas.addPaintListener(new PaintListener() {
>      @Override
>      public void paintControl(PaintEvent e) {
>        //        e.gc.setLineAttributes(new LineAttributes(1, SWT.CAP_FLAT, SWT.JOIN_MITER));
>        e.gc.setForeground(new Color(Display.getCurrent(), 0, 0, 0));
>        e.gc.setBackground(new Color(Display.getCurrent(), 255, 255, 255));
>        Transform transform = new Transform(Display.getCurrent());
>        transform.translate(100, 100);
>        transform.rotate(rotation);
>        e.gc.setTransform(transform);
>        e.gc.fillRectangle(0, 0, 20, 20);
>        e.gc.drawRectangle(0, 0, 20, 20);
>      }
>    });
>
>    shell.open ();
>    while (!shell.isDisposed ()) {
>      if (!display.readAndDispatch ()) {
>        display.sleep ();
>      }
>    }
>  }
>}

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Attachments on bug 253670: 133345 | 133346 | 214841