布局问题:自动增长标签(SWT)
我正在使用 GridLayout 尝试使标签自动增长而不隐藏其任何内容。这是一个要测试的简单代码:每次按下按钮时,标签文本都会变大,但只有在水平调整窗口大小后,我才能获得正确的布局。 有没有什么办法可以解决这个问题而无需调整窗口大小? 我想我已经尝试了所有属性,但仍然无法正常工作,这让我发疯!
这就是我得到的
这就是它应该的样子
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class UItest {
protected Shell shell;
private Label label;
public static void main(String[] args) {
try {
UItest window = new UItest();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
protected void createContents() {
shell = new Shell();
shell.setSize(450, 300);
shell.setText("SWT Application");
shell.setLayout(new GridLayout(1, false));
Button button = new Button(shell, SWT.NONE);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent arg0) {
label.setText(label.getText() + " " + label.getText());
}
});
button.setText("New Button");
label = new Label(shell, SWT.WRAP);
label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1));
label.setText("New Label");
List list = new List(shell, SWT.BORDER);
list.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
}
protected Label getLabel() {
return label;
}
}
感谢您的宝贵时间。
解决了这些更改:
Button button = new Button(shell, SWT.NONE);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent arg0) {
label.setText(label.getText() + " " + label.getText());
shell.layout(); // ADDED THIS
}
});
button.setText("New Button");
label = new Label(shell, SWT.WRAP);
// SET HORIZONTAL GRAB ON LABEL (FIRST TRUE IN GridData CONSTRUCTOR)
label.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1));
label.setText("New Label");
I'm using a GridLayout trying to make a label autogrow without hiding anything of its content. Here's a simple code to test: Everytime I press the button the label text grows larger, but only after I resize the window horizontally I get the correct layout.
Is there any way to fix this without having to resize the window?
I think I've tried every property and I still can't get this working, it's driving me nuts!
This is what I got
This is how it should be
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
public class UItest {
protected Shell shell;
private Label label;
public static void main(String[] args) {
try {
UItest window = new UItest();
window.open();
} catch (Exception e) {
e.printStackTrace();
}
}
public void open() {
Display display = Display.getDefault();
createContents();
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
protected void createContents() {
shell = new Shell();
shell.setSize(450, 300);
shell.setText("SWT Application");
shell.setLayout(new GridLayout(1, false));
Button button = new Button(shell, SWT.NONE);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent arg0) {
label.setText(label.getText() + " " + label.getText());
}
});
button.setText("New Button");
label = new Label(shell, SWT.WRAP);
label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1));
label.setText("New Label");
List list = new List(shell, SWT.BORDER);
list.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
}
protected Label getLabel() {
return label;
}
}
Thanks for your time.
SOLVED WITH THESE CHANGES:
Button button = new Button(shell, SWT.NONE);
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent arg0) {
label.setText(label.getText() + " " + label.getText());
shell.layout(); // ADDED THIS
}
});
button.setText("New Button");
label = new Label(shell, SWT.WRAP);
// SET HORIZONTAL GRAB ON LABEL (FIRST TRUE IN GridData CONSTRUCTOR)
label.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1));
label.setText("New Label");
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我认为,问题在于文本更改时布局不会失效 - 尝试强制重新布局(通过调用 getShell().layout(true, true) )。
I think, the problem is that the layout is not invalidated when the text changes - try to force a relayouting (by calling
getShell().layout(true, true)
).