Question

我正在尝试创建一个Java JDialog，其中符号以表格方式显示。实际上类似于charmap for windows： enter image description here

但我遇到了一些问题：

我需要JDialog重新调整大小，所以我不能选择将表作为显示，因为它需要动态缩放。（澄清我的意思不仅仅是调整宽度每个单元格，但行/列中单元格的实际数量）
这些符号显然需要包含在某种听众友好的组件中。但是如果我选择JButton，由于像素中的字符宽度不同，一切看起来都不对。
由于我必须遍历符号才能创建JButtons，因此我只能创建没有名称的对象。那么我怎样才能找出按下哪个按钮？

这是我到目前为止所得到的：

代码已于2014年12月5日更新

import java.awt.Dimension;

import javax.swing.JDialog;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.border.EmptyBorder;

import java.awt.Color;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;


public class SymbolDialog extends JDialog{
private char[] math = {8704, 8707, 8708, 8710, 8712, 8713, 8715, 8716, 8721, 8723, 8728, 8730, 8734, 8743, 8744, 8745, 8746, 8747, 8776, 8793, 8800, 8801, 8804, 8805, 8834, 8835, 8836, 8837, 8838, 8839};
private final String[] sTypes = {"Math","Logic", "Arrows"};
private JPanel pan = new JPanel();

public SymbolDialog(){
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (ClassNotFoundException e) {
        System.out.println("catdch 1");
    } catch (InstantiationException e1) {
        System.out.println("catdch 2");
    } catch (IllegalAccessException e1) {
        System.out.println("catdch 3");
    } catch (UnsupportedLookAndFeelException e1) {
        System.out.println("catdch 4");
    }
    SwingUtilities.updateComponentTreeUI(this);

    pan.setPreferredSize(new Dimension(428, 70));
    pan.setLayout(new ColumnsFlowLayout(0,0));
    // Button Build
    for (int i = 0; i < math.length; i++){
        pan.add(new JButton(math[i]+""));
    }  
    GridBagLayout gridBagLayout = new GridBagLayout();
    gridBagLayout.columnWidths = new int[]{0, 0};
    gridBagLayout.rowHeights = new int[]{0, 0, 0};
    gridBagLayout.columnWeights = new double[]{1.0, Double.MIN_VALUE};
    gridBagLayout.rowWeights = new double[]{0.0, 1.0, Double.MIN_VALUE};
    getContentPane().setLayout(gridBagLayout);

    JPanel panel = new JPanel();
    panel.setBorder(new EmptyBorder(5,10,0,10));
    GridBagConstraints gbc_panel = new GridBagConstraints();
    gbc_panel.anchor = GridBagConstraints.WEST;
    gbc_panel.fill = GridBagConstraints.VERTICAL;
    gbc_panel.insets = new Insets(0, 0, 5, 0);
    gbc_panel.gridx = 0;
    gbc_panel.gridy = 0;
    getContentPane().add(panel, gbc_panel);
    GridBagLayout gbl_panel = new GridBagLayout();
    gbl_panel.columnWidths = new int[]{0, 0, 0};
    gbl_panel.rowHeights = new int[]{0, 0};
    gbl_panel.columnWeights = new double[]{1.0, 0.0, Double.MIN_VALUE};
    gbl_panel.rowWeights = new double[]{0.0, Double.MIN_VALUE};
    panel.setLayout(gbl_panel);

    JLabel lblCathegorie = new JLabel("Categories:");
    GridBagConstraints gbc_lblCathegorie = new GridBagConstraints();
    gbc_lblCathegorie.insets = new Insets(0, 0, 0, 5);
    gbc_lblCathegorie.gridx = 0;
    gbc_lblCathegorie.gridy = 0;
    panel.add(lblCathegorie, gbc_lblCathegorie);

    JComboBox<Object> comboBox = new JComboBox<Object>(sTypes);
    GridBagConstraints gbc_comboBox = new GridBagConstraints();
    gbc_comboBox.gridx = 1;
    gbc_comboBox.gridy = 0;
    panel.add(comboBox, gbc_comboBox);

    GridBagConstraints gbc_scrollPane = new GridBagConstraints();
    gbc_scrollPane.fill = GridBagConstraints.BOTH;
    gbc_scrollPane.gridx = 0;
    gbc_scrollPane.gridy = 1;
    getContentPane().add(pan, gbc_scrollPane);

    // Pack
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    setResizable(true);
    pack();
    setTitle("Symbols");
    setVisible(true);

}
public void actionPerformed(ActionEvent event) {
    //TODO sysout which symbol was clicked
    System.out.println(((JButton) event.getSource()).getText());
}

public static void main(String[] args){
    new SymbolDialog();
}
}

ps：我使用here

Answer 1

我会在JButton[][]中使用GridLayout。要将它们添加到JPanel，您可以在for循环中使用它，如下所示：

for(int row = 0; row < ITEMS-PER-ROW; row++){
     for(int col = 0; col < ITEMS-PER-COL; col++){
        JButton[row][col] = new JButton(/*SignToShowAs  String[][]*/)
     }
}

Java符号表对话框

1 个答案: