如何从JDialog中完全删除图标？ [英] How to completely remove an icon from JDialog?

问题描述

我正在创建一个对话框，用于显示文件复制的进度。我想要做的是完全删除对话框的图标图像。

I am creating a dialog for showing a progress of files' copying. What I want to do is to completely remove dialog's icon image.

我在提供应用程序的实例 FrameView 作为 JDialog 的构造函数的参数：

I created such kind of dialogs before providing an application's instance of FrameView as an argument for JDialog's constructor like this:

public class MyAppView extends FrameView {

    // ...

    @Action
    public void showOptionsDialog() {

        // Creating modal options' dialog
        JDialog optionsDialog = new JDialog(this, true);

        // ...
    }
}

所以，正如我所看到的，我需要一个父组件来使我的对话框没有图标。在我目前的情况下（当我没有父框架视图时）我尝试了以下hack方法设置一个透明图标，但它不能像我期望的那样工作 - 我仍然看到对话框标题栏中的图标的空白区域（是什么当我点击这个区域时，我仍然有一个弹出窗口。

So, as I can see, I need a parent component to make my dialog with no icon. In my current case (when I have no parent frame view) I tried the following hack method setting a transparent icon but it doesn't work as I expect - I still see an empty area for an icon in dialog's title bar and (what's the worst) I still have a popup window when I click this area.

JFrame dummyFrame = new JFrame();
Image icon = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB_PRE);
dummyFrame.setIconImage(icon);
JDialog myDialog = new JDialog(dummyFrame, true);

无论如何，必须可以删除图标。工作示例是 JOptionPane ：

Anyway, it must be possible to remove an icon. The working example is JOptionPane:

JOptionPane.showMessage(null, "My message");

查看 JOptionPane 的源代码一可以找到静态 Frame JOptionPane.getRootFrame（）用于在父组件设置为 null ：

Looking at JOptionPane's source code one can find that static Frame JOptionPane.getRootFrame() is used to get a parent for the calls when parent component is set to null:

public static Frame getRootFrame() throws HeadlessException {
    Frame sharedFrame = 
        (Frame)SwingUtilities.appContextGet(sharedFrameKey);
    if (sharedFrame == null) {
        sharedFrame = SwingUtilities.getSharedOwnerFrame();
        SwingUtilities.appContextPut(sharedFrameKey, sharedFrame);
    }
    return sharedFrame;
}

所以我也尝试按如下方式创建对话框：

So I've also tried to create my dialog as follows:

JDialog myDialog = new JDialog(JOptionPane.getRootFrame(), true);

但仍然没有成功。当我尝试应用此代码段时，我有一个标准的Java图标。

but there is still no success. I have a standard Java icon when I try to apply this code snippet.

我的问题是：我做错了什么？ 如何通过 JOptionPane ？

And my question is: what am I doing wrong? How to completely remove an icon of JDialog as it is done by JOptionPane?

PS我使用JDK6。

P.S. I use JDK6.

推荐答案

解决方案是使对话框不可调整大小，然后它将没有任何父级的图标窗口。

The solution is to make a dialog non-resizable and then it will be without an icon with any parent window.

JDialog myDialog = new JDialog(new Frame(), true);
myDialog.setResizable(false);
myDialog.setVisible(true);

不幸的是，如果您的对话框可以调整大小，除了设置一个图标外无法删除图标透明图标。

Unfortunately, if your dialog is to be resizable there is no way to remove an icon except of setting a transparent icon.

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