Re: [platform-swt-dev] Size of IFigure in LightweightSystem

[Veronika Irvine <Veronika_Irvine@xxxxxxxxxx>]

If you have set a layout on the parent, you should not call setBounds() on 
the child.

Since you have used a GridLayout, you should instead use something like:

GridData data = new GridData();
data.widthHint = 500;
data.heightHint = 75;
graphGroup.setLayoutData(data);

The same is true of graphCanvas.

See:

http://www.eclipse.org/articles/Understanding%20Layouts/Understanding%20Layouts.htm

There is bug report regarding the second resize on shell.open:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=4409





"W. Nathaniel Mills, III" <nat@xxxxxxxxxxxxxxxx>
Sent by: platform-swt-dev-admin@xxxxxxxxxxx
09/17/2003 03:39 PM
Please respond to platform-swt-dev
 
        To:     platform-swt-dev@xxxxxxxxxxx
        cc: 
        Subject:        [platform-swt-dev] Size of IFigure in 
LightweightSystem


I have a group where I've set the bounds and I've created a Canvas in its 
client area. When I query the canvas, I get reasonable sizes:

However, when the paintFigure method is called, the dimension of the 
client area is only 64x64 rather than the expected 494x59.  I've tried 
setting the constructor of the Figure to a Dimension of 494x59.

Here is some example code that shows the problem.  I'd expected the blue 
rectangle to fill the client area of the group.

import org.eclipse.draw2d.Figure;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.LightweightSystem;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Shell;

public class testFigure {
static class ChartFigure extends Figure {
    public ChartFigure(Dimension dim) {
      setMinimumSize(dim);
      System.out.println("Dim:" + dim);
      setBounds(new Rectangle(0, 0, dim.width, dim.height));
    }

    protected void paintFigure(Graphics g) {
      Rectangle clientArea = getClientArea();
      Rectangle graphArea = clientArea.getCopy();
      Dimension dim = graphArea.getSize();
      System.out.println(dim);
    }
}

public static void main(String[] args) {
    final Display display = new Display();
    Color m_Red = display.getSystemColor(SWT.COLOR_RED);
    Color m_Blue = display.getSystemColor(SWT.COLOR_BLUE);
    Color m_White = display.getSystemColor(SWT.COLOR_WHITE);
    Color m_Gray = display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);
    Color m_Green = display.getSystemColor(SWT.COLOR_GREEN);
    Color m_Black = display.getSystemColor(SWT.COLOR_BLACK);

    final Shell shell = new Shell();
    shell.setBounds(0, 0, 540, 540);
    final GridLayout gridLayout = new GridLayout();
    gridLayout.makeColumnsEqualWidth = true;
    shell.setLayout(gridLayout);
    final Group graphGroup = new Group(shell, SWT.NONE);
    graphGroup.setBounds(0, 0, 500, 75);
    graphGroup.setText("Graph:");
    graphGroup.setLayoutData(new 
GridData(GridData.HORIZONTAL_ALIGN_FILL));
    final GridLayout graphLayout = new GridLayout();
    graphLayout.numColumns = 1;
    graphLayout.makeColumnsEqualWidth = true;
    graphGroup.setLayout(graphLayout);
    org.eclipse.swt.graphics.Rectangle rect = graphGroup.getClientArea();
    System.out.println("Rect:" + rect);

    final Canvas graphCanvas = new Canvas(graphGroup, SWT.NONE);
    graphCanvas.setBounds(graphGroup.getClientArea());
    graphCanvas.setBackground(m_Blue);
    org.eclipse.swt.graphics.Point pt = graphCanvas.getSize();
    System.out.println("Client:" + pt);

    ChartFigure m_ChartFigure = new ChartFigure(new Dimension(pt));
    LightweightSystem lws = new LightweightSystem(graphCanvas);
    lws.setContents(m_ChartFigure);
    // DESIGNER: Add controls before this line.
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
}
}

Thanks in advance for your help (I can send the source if it got too 
mangled)...  Nat

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