根据标题中的文本设置JTable的列宽 [英] Set a column width of JTable according to the text in a header
问题描述
我需要根据标题中的文本获得适当的表大小.它包含日期的捷克语缩写,例如:"Po",Út","St",atc.但不会显示这三个点.
I need to get an appropriate table size according to a text in a header. It contains abbreviations of czech names of days like: "Po", "Út", "St", atc. but instead of this three dots are displayed.
我有此代码:
width
,height
-所有最小行/列大小的最大值
allWidth
,allHeight
-应该是整个桌子的总宽度,高度
width
, height
- max of all minimum row/column sizes
allWidth
,allHeight
- should be the total width, height of the whole table
//GET DIMENSION
int width = 0;
int height = 0;
int allWidth, allHeight;
for (int col = 0; col < table.getColumnCount(); col++) {
TableColumn tableColumn = table.getTableHeader().getColumnModel().getColumn(col);
TableCellRenderer renderer = tableColumn.getHeaderRenderer();
if (renderer == null) {
renderer = table.getTableHeader().getDefaultRenderer();
}
Component component = renderer.getTableCellRendererComponent(table,
tableColumn.getHeaderValue(), false, false, -1, col);
width = Math.max(component.getPreferredSize().width, width);
table.getColumnModel().getColumn(col).setPreferredWidth(width);
}
allWidth = table.getColumnCount() * width;
for (int row = 0; row < table.getRowCount(); row++) {
TableCellRenderer renderer = table.getCellRenderer(row, 0);
Component comp = table.prepareRenderer(renderer, row, 0);
height = Math.max(comp.getMinimumSize().height, height);
}
allHeight = table.getRowCount() * height;
//HERE I SET WIDTHS AND HEIGHTS
table.setRowHeight(height);
table.setMinimumSize(new Dimension(allWidth, allHeight));
scrollPane.setMinimumSize(new Dimension(allWidth, allHeight));
我正在使用具有此设置的GridBagLayout,我认为这是可以的:
I'm using GridBagLayout with this settings, I think this is ok:
this.setBorder(BorderFactory.createTitledBorder("Calendar"));
gbc.fill = GridBagConstraints.NONE;
gbc.gridx = 0;
gbc.gridy = 1; //position x=0, y=0 is for JSpinners, months and years
gbc.weighty = 0;
gbc.weightx = 0;
add(scrollPane,gbc);//add table in a custom Calendar component
我还改变了外观,这导致了这三个点.否则,名称将正确显示.
Also I changed the look and feel and this is causing those three dots. Otherwise the names are correctly displayed.
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {
}
这就是我初始化JTable和JScrollPane的方式,我感觉这也可以.
And this is how I initialize JTable and JScrollPane, I have a feeling like this could be ok too.
setTable(new JTable());
getTable().setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
getTable().setAutoscrolls(false);
getTable().getTableHeader().setResizingAllowed(false);
getTable().getTableHeader().setReorderingAllowed(false);
getTable().setColumnSelectionAllowed(true);
getTable().setRowSelectionAllowed(true);
getTable().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
tableModel = new CalendarTableModel(); //my class extended from AbstractTableModel
getTable().setModel(tableModel);
scrollPane = new JScrollPane(table,JScrollPane.VERTICAL_SCROLLBAR_NEVER,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setAutoscrolls(false);
问题:
如果我没有使用gbc设置scrollPane来调整自身大小,除非我手动计算并设置了table
和scrollPane
的最小大小,否则它将获得最小的大小. (左图)
Problems:
If I don't set the scrollPane with gbc to resize itself, it gets the minimum possible size unless I calculate and set the minimum sizes of table
and scrollPane
by hand. (the left picture)
allHeight = (1+table.getRowCount()+pady) * height; //plus one line of header
allWidth = table.getColumnCount() * width;
我的照片在右边.
I got the picture on the right.
这里是一个简单的完整可编译类,用于演示该问题:
Here is a simple complete compilable class that demonstrates the problem:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Main {
public static void main(String[] args) {
new Main().start();
}
private void start() {
JFrame f = new JFrame();
f.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
initTable();
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {
}
JPanel calendar = new JPanel();
calendar.setLayout(new GridBagLayout());
calendar.setBorder(BorderFactory.createTitledBorder("Calendar"));
gbc.fill = GridBagConstraints.NONE;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weighty = 0;
gbc.weightx = 0;
calendar.add(scrollPane, gbc);
f.add(calendar,gbc);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
JTable table;
JScrollPane scrollPane;
CalendarTableModel tableModel;
private void initTable() {
setTable(new JTable());
getTable().setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
getTable().setAutoscrolls(false);
getTable().getTableHeader().setResizingAllowed(false);
getTable().getTableHeader().setReorderingAllowed(false);
getTable().setColumnSelectionAllowed(true);
getTable().setRowSelectionAllowed(true);
getTable().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
tableModel = new CalendarTableModel(); //my class extended from AbstractTableModel
getTable().setModel(tableModel);
scrollPane = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setAutoscrolls(false);
//GET DIMENSION
int width = 0;
int height = 0;
int allWidth, allHeight;
int padx = 2,pady = 2;
for (int col = 0; col < table.getColumnCount(); col++) {
TableColumn tableColumn = table.getTableHeader().getColumnModel().getColumn(col);
TableCellRenderer renderer = tableColumn.getHeaderRenderer();
if (renderer == null) {
renderer = table.getTableHeader().getDefaultRenderer();
}
Component component = renderer.getTableCellRendererComponent(table,
tableColumn.getHeaderValue(), false, false, -1, col);
width = Math.max(component.getPreferredSize().width, width);
table.getColumnModel().getColumn(col).setPreferredWidth(width);
}
allWidth = (table.getColumnCount()+padx) * width;
for (int row = 0; row < table.getRowCount(); row++) {
TableCellRenderer renderer = table.getCellRenderer(row, 0);
Component comp = table.prepareRenderer(renderer, row, 0);
height = Math.max(comp.getMinimumSize().height, height);
}
allHeight = (1+table.getRowCount()+pady) * height;
//HERE I SET WIDTHS AND HEIGHTS
table.setRowHeight(height);
table.setMinimumSize(new Dimension(allWidth, allHeight));
scrollPane.setMinimumSize(new Dimension(allWidth, allHeight));
}
private void setTable(JTable jTable) {
this.table = jTable;
}
private JTable getTable() {
return this.table;
}
private class CalendarTableModel extends AbstractTableModel {
private String[] daysData = {"Po", "Út", "St", "Čt", "Pá", "So", "Ne"};
private int[][] values;
public CalendarTableModel() {
values = new int[7][6];
for (int i = 0; i < 6; i++) {
for (int j = 0; j < 7; j++) {
values[j][i] = 7;
}
}
}
@Override
public int getRowCount() {
return 6;
}
@Override
public int getColumnCount() {
return 7;
}
@Override
public String getColumnName(int column) {
return daysData[column];
}
@Override
public Object getValueAt(int row, int column) {
return this.values[column][row];
}
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
}
}
推荐答案
您可以获取此
作者
-
f.pack()
在f.setVisible(true);
所需宽度应该为22/23像素x,但component.getPreferredSize(
)或SwingUtilities#computeStringWidth(FontMetrics fm, String str)
仅返回17/18,并且table.getIntercellSpacing().width
的Po-Ne仅加一个像素
desired widht should be at 22 / 23 pixelx but component.getPreferredSize(
) or SwingUtilities#computeStringWidth(FontMetrics fm, String str)
returns only 17 / 18 and plus table.getIntercellSpacing().width
only one pixel for Po - Ne
请注意,真正的解决方法可能是基于@的 TableColumnAdjuster camickr
note real workaround could be based on TableColumnAdjuster by @camickr
来自代码
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.text.JTextComponent;
public class Main {
public static void main(String[] args) {
new Main().start();
}
private void start() {
JFrame f = new JFrame();
f.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
initTable();
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {
}
JPanel calendar = new JPanel();
calendar.setLayout(new GridBagLayout());
calendar.setBorder(BorderFactory.createTitledBorder("Calendar"));
gbc.fill = GridBagConstraints.NONE;
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weighty = 0;
gbc.weightx = 0;
calendar.add(scrollPane, gbc);
f.add(calendar, gbc);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setVisible(true);
}
JTable table;
JScrollPane scrollPane;
CalendarTableModel tableModel;
private void initTable() {
setTable(new JTable());
getTable().setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
getTable().setAutoscrolls(false);
getTable().getTableHeader().setResizingAllowed(false);
getTable().getTableHeader().setReorderingAllowed(false);
getTable().setColumnSelectionAllowed(true);
getTable().setRowSelectionAllowed(true);
getTable().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
tableModel = new CalendarTableModel(); //my class extended from AbstractTableModel
getTable().setModel(tableModel);
scrollPane = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setAutoscrolls(false);
TableColumnModel columnModel = table.getColumnModel();
for (int col = 0; col < table.getColumnCount(); col++) {
int maxWidth = 0;
for (int row = 0; row < table.getRowCount(); row++) {
TableCellRenderer rend = table.getCellRenderer(row, col);
Object value = table.getValueAt(row, col);
Component comp = rend.getTableCellRendererComponent(table, value, false, false, row, col);
maxWidth = Math.max(comp.getPreferredSize().width, maxWidth);
}
TableColumn column = columnModel.getColumn(col);
TableCellRenderer headerRenderer = column.getHeaderRenderer();
if (headerRenderer == null) {
headerRenderer = table.getTableHeader().getDefaultRenderer();
}
Object headerValue = column.getHeaderValue();
Component headerComp = headerRenderer.getTableCellRendererComponent(table, headerValue, false, false, 0, col);
maxWidth = Math.max(maxWidth, headerComp.getPreferredSize().width);
// note some extra padding
column.setPreferredWidth(maxWidth + 6);//IntercellSpacing * 2 + 2 * 2 pixel instead of taking this value from Borders
}
DefaultTableCellRenderer stringRenderer = (DefaultTableCellRenderer) table.getDefaultRenderer(String.class);
stringRenderer.setHorizontalAlignment(SwingConstants.CENTER);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
}
private void setTable(JTable jTable) {
this.table = jTable;
}
private JTable getTable() {
return this.table;
}
private class CalendarTableModel extends AbstractTableModel {
private String[] daysData = {"Pondelok", "Út", "St", "Čt", "Pá", "Sobota", "Ne"};
private int[][] values;
public CalendarTableModel() {
values = new int[7][6];
for (int i = 0; i < 6; i++) {
for (int j = 0; j < 7; j++) {
values[j][i] = 30;
}
}
}
@Override
public int getRowCount() {
return 6;
}
@Override
public int getColumnCount() {
return 7;
}
@Override
public String getColumnName(int column) {
return daysData[column];
}
@Override
public Object getValueAt(int row, int column) {
return this.values[column][row];
}
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
}
}
这篇关于根据标题中的文本设置JTable的列宽的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!