Question

我正在设计一个使用GridBagLayout显示项目的面板。我正在寻找的结果是这样的：

但是，目前我看到以下内容：

然后我初始化我的面板并设置布局：

JPanel surveyDetailsFieldsPane = new JPanel();  
surveyDetailsFieldsPane.setMinimumSize(new Dimension(0, 300));
surveyDetailsFieldsPane.setPreferredSize(new Dimension(410, 300));
GridBagLayout detailsGridBagLayout = new GridBagLayout();
surveyDetailsFieldsPane.setLayout(detailsGridBagLayout);
surveyDetailsFieldsPane.setBorder(new EmptyBorder(STANDARD_BORDER,
            STANDARD_BORDER,
            STANDARD_BORDER,
            STANDARD_BORDER));

我初始化我的组件以添加到网格中：

JLabel jobNameLbl.setText("Job Name:");
JTextField jobNameTF = new JTextField(20);

JLabel jobNumLbl.setText("Job Number:");
JTextField jobNumTF = new JTextField(12);

然后我使用addComponentToSurveyDetailsGrid方法将组件添加到网格中：

 // Row 1
 addComponentToSurveyDetailsGrid(jobNameLbl, 0, 0, 1, 1, 0, 0, GridBagConstraints.NONE, GridBagConstraints.WEST);
 addComponentToSurveyDetailsGrid(jobNameTF, 1, 0, 1, 1, 0, 0, GridBagConstraints.HORIZONTAL, GridBagConstraints.WEST);
 // Row 2
 addComponentToSurveyDetailsGrid(jobNumLbl, 0, 1, 1, 1, 10, 0, GridBagConstraints.NONE, GridBagConstraints.WEST); 
 addComponentToSurveyDetailsGrid(jobNumTF, 1, 1, 0, 1, 40, 0, GridBagConstraints.HORIZONTAL, GridBagConstraints.WEST);
 addComponentToSurveyDetailsGrid(dateLbl, 4, 1, 1, 1, 10, 0, GridBagConstraints.NONE, GridBagConstraints.WEST);
 addComponentToSurveyDetailsGrid(dateTF, 5, 1, 0, 1, 40, 0, GridBagConstraints.HORIZONTAL, GridBagConstraints.WEST);

使用的方法如下所示：

private void addComponentToSurveyDetailsGrid(Component component, int gridX, int gridY,
                            int gridWidth, int gridHeight, int weightX, 
                            int weightY, int fill, int anchor) {

    GridBagConstraints constraint = new GridBagConstraints();
    constraint.gridx = gridX;
    constraint.gridy = gridY;
    constraint.gridwidth = gridWidth;
    constraint.gridheight = gridHeight;
    constraint.weightx = weightX;
    constraint.weighty = weightY;       
    constraint.fill = fill;
    constraint.anchor = anchor;
    constraint.insets = new Insets(Dimens.SMALL_BORDER, 
                                Dimens.SMALL_BORDER, 
                                Dimens.SMALL_BORDER, 
                                Dimens.SMALL_BORDER);
    detailsGridBagLayout.setConstraints(component, constraint);
    surveyDetailsFieldsPane.add(component);
}

请告诉我这里做错了什么！

Answer 1

我怀疑它会解决你的问题，但是：

 addComponentToSurveyDetailsGrid(jobNumLbl, 0, 1, 1, 1, 10, 0, ...
 addComponentToSurveyDetailsGrid(jobNumTF, 1, 1, 0, 1, 40, 0, ...
 addComponentToSurveyDetailsGrid(dateLbl, 4, 1, 1, 1, 10, 0, ...
 addComponentToSurveyDetailsGrid(dateTF, 5, 1, 0, 1, 40, 0, ...

您的gridx值为0,1,4,5。

您不能尝试将组件添加到网格4. GridBagLayout不会奇怪地将组件添加到网格2和3.所以您需要将组件添加到网格2和3。

如果希望jobname文本字段占用其下3个组件的空间，则在添加jobname文本字段时需要指定gridwidth值为3。

阅读How to Use GridBagLayout上的Swing教程中的部分。本教程将解释gridwidth参数的工作原理，并为您提供下载和测试的工作示例。

并非GridBagLayout行中显示的所有项目

1 个答案: