SWT
Local
External
Example Tiny SWT Program
package com.erdas.experimental;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Shell;
public class JavaWithNative {
/**
* @param args
*/
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Hello world");
Layout layout = new RowLayout();
shell.setLayout(layout);
Button button = new Button(shell, SWT.NONE);
button.setText("Button");
shell.pack();
shell.open();
while(!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}
MessageBox
// often a shell can be gotton by:
Shell shell = this.getShell();
MessageBox mb = new MessageBox(shell);
mb.setMessage("Invalid choice");
mb.open();
See examples here
Layouts
(as of SWT 3.3)
| Name | | Description |
| ColumnLayout | | arranges children in VERTICAL columns, columns are IDENTICAL SIZED, and children STRETCHED HORIZONTALLY, ColumnLayoutData has width and height hints. |
| FillLayout | | |
| FormLayout | | |
| GridLayout | | |
| RowLayout | | |
| SourceViewer.RulerLayout | | |
| StackLayout |
|
All children are at the same place and size - BUT only the topmost one is visible.
Set topmost and call layout to show a new top one.
|
| TableLayout | | |
| TableWrapLayout | | |
| WizardDialog.PageContainerFillLayout | | |
Colors
control.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_MAGENTA))
Size, setting a Minimum Size
Use the Layout GridLayout and when adding a child set its GridData's widthHint and/or heightHint
Composite panel = new Composite(toAddPanel, SWT.NONE);
GridLayout grid = new GridLayout();
grid.numColumns = 1;
panel.setLayout(grid);
Text text = new Text(panel, SWT.SINGLE);
GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
gridData.widthHint = 500;
text.setLayoutData(gridData);