Question

我必须在某个动作上显示一个消息框，我能够这样做但是消息对话框看起来尺寸较小。有没有办法增加java中消息框的大小？

这是我的代码：

Display.getDefault().syncExec(new Runnable () {
 @Override
 public void run() {
// Get active window page
   IWorkbench workbench = PlatformUI.getWorkbench();
  IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
  Shell parent  = window.getShell();
  MessageBox dialog = 
  new MessageBox(shell,SWT.RESIZE|SWT.ICON_INFORMATION|SWT.OK);

  dialog.setText("Project info");
  dialog.setMessage("Project info Text will come here");
  int returnCode = dialog.open(); 
  System.out.println("returnCode "+ returnCode);
  }     
});

Answer 1

您可以创建自己的对话框。看一下示例here。我已经复制了相关代码，以防链接停止工作：

public class DialogExample extends Dialog {

    public DialogExample(Shell parent) {
        super(parent);
    }

    public String open() {
        Shell parent = getParent();
        Shell dialog = new Shell(parent, SWT.DIALOG_TRIM
            | SWT.APPLICATION_MODAL);
        dialog.setSize(100, 100);
        dialog.setText("Java Source and Support");
        dialog.open();
        Display display = parent.getDisplay();
        while (!dialog.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        return "After Dialog";
    }

    public static void main(String[] argv) {
        new DialogExample(new Shell());
    }
}

Answer 2

据我所知，SWT使用OS系统消息框，这意味着您只能更改标题/文本和图标类型。

但你可以使用JFace，它是SWT的扩展，并尝试使用org.eclipse.jface.dialogs.MessageDialog API。

Answer 3

这是我的版本：您不需要对对话框大小进行硬编码，而是根据用户的屏幕大小进行变换。

我在下面添加了我的个人帮助方法，并展示了它们的用法。

这比操作系统MessageBox更灵活，但你必须手动添加图标（我认为你甚至可以覆盖MessageDialog而不是Dialog - 你的调用）

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Monitor;
import org.eclipse.swt.widgets.Shell;

/**
 * 
 * @author stackoverflow.com/users/1774643/ggrec
 *
 */
public class CustomMessageBox extends Dialog
{

    // ==================== 1. Static Fields ========================

    /*
     * Default ratio values for big dialogs
     */
    private static final double DEFAULT_DIALOG_WIDTH_SCREEN_PERCENTAGE = 0.63;
    private static final double DEFAULT_DIALOG_HEIGHT_SCREEN_PERCENTAGE = 0.75; 


    // ==================== Static Helper Methods ====================

    /**
     * <pre>
     * Very useful for dialogs. Resizes the dialog shell to a size proportional
     * to the primary monitor bounds.
     * 
     * <b>1920x1080 monitor && 0.63x0.75 ratios => 1400x800 shell</b>
     * 
     * This means 63% of screen's width, and 75% of screen's height.
     *
     * The advantage of this method is that the dialog will always be proportional
     * to the screen, no matter what the screen size is (e.g. big LG flat TV screen,
     * or MacOS display).
     * </pre> 
     *  
     * @param shell Dialog shell (e.g. the 'newShell' object in configureShell API from Dialog)
     * @param widthRatio A percentage of current screen's size (i.e. smaller than 1, bigger than 0)
     * @param heightRatio 
     */
    public static void resizeAndCenterShellOnScreen(final Shell shell, final double widthRatio, final double heightRatio)
    {
        final Display display = shell.getDisplay();
        final Monitor primaryMonitor = display.getPrimaryMonitor();
        final Rectangle monitorRect = primaryMonitor.getBounds();

        // 1.) Resize the Shell
        final int newWidth  = (int) Math.floor(monitorRect.width  * widthRatio);
        final int newHeight = (int) Math.floor(monitorRect.height * heightRatio);

        shell.setSize(newWidth, newHeight);
        centerShellOnScreen(shell);
    }


    public static void centerShellOnScreen(final Shell shell)
    {
        final Rectangle shellBounds = shell.getBounds();

        final Display display = shell.getDisplay();
        final Monitor primaryMonitor = display.getPrimaryMonitor();
        final Rectangle monitorRect = primaryMonitor.getBounds();

        final int x = monitorRect.x + (monitorRect.width  - shellBounds.width)  / 2;
        final int y = monitorRect.y + (monitorRect.height - shellBounds.height) / 2;

        shell.setLocation(x, y);
    }


    // ==================== 3. Static Methods ====================

    public static void main(final String[] args)
    {
        new CustomMessageBox().open();
    }


    // ==================== 4. Constructors ====================

    public CustomMessageBox()
    {
        super(Display.getDefault().getActiveShell());
    }


    // ==================== 5. Creators ====================

    @Override
    protected Control createDialogArea(final Composite parent)
    {
        final Composite dialogArea = (Composite) super.createDialogArea(parent);

        final Label label = new Label(dialogArea, SWT.NULL);
        label.setText("YOLO");
        label.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, true));

        return dialogArea;
    }


    @Override
    protected void configureShell(final Shell newShell)
    {
        super.configureShell(newShell);

        resizeAndCenterShellOnScreen(newShell, DEFAULT_DIALOG_WIDTH_SCREEN_PERCENTAGE, DEFAULT_DIALOG_HEIGHT_SCREEN_PERCENTAGE);
    }

}

干杯。

调整SWT中的消息框大小（Eclipse Platform API）

3 个答案: