[英]How enable scroll using scroll composite in gridlayout?
如果我使用外殼,下面的代碼工作正常。 但我使用的復合材料無法正常工作。
如果使用shell,代碼可以正常工作:
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout(new GridLayout());
final ScrolledComposite sc = new ScrolledComposite(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
sc.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
Composite c = new Composite(sc, SWT.NONE);
c.setLayout(new GridLayout(10, true));
for (int i = 0 ; i < 300; i++) {
Button b = new Button(c, SWT.PUSH);
b.setText("Button "+i);
}
sc.setContent(c);
sc.setExpandHorizontal(true);
sc.setExpandVertical(true);
sc.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT));
sc.setShowFocusedControl(true);
shell.setSize(300, 500);
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
如果在gridlayout中使用Composite,則相同的代碼將無法正常工作:
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout(new GridLayout());
Composite c1 = new Composite(shell, SWT.NONE);
c1.setLayout(new GridLayout());
final ScrolledComposite sc = new ScrolledComposite(c1, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
sc.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
Composite c = new Composite(sc, SWT.NONE);
c.setLayout(new GridLayout(10, true));
for (int i = 0 ; i < 300; i++) {
Button b = new Button(c, SWT.PUSH);
b.setText("Button "+i);
}
sc.setContent(c);
sc.setExpandHorizontal(true);
sc.setExpandVertical(true);
sc.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT));
sc.setShowFocusedControl(true);
shell.setSize(300, 500);
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
您沒有告訴c1
復合材料相對於其父級應該如何表現(即設置布局數據)。
您有兩種選擇:
c1.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
要么
shell.setLayout(new FillLayout());
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