Java Swing JTable；右键单击菜单（我如何让它“选择”又名突出显示行）
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Java Swing JTable; Right Click Menu (How do I get it to "select" aka highlight the row)
提问by Carlo del Mundo
Short: I need a "right-click event" to highlight the cell row.
简短：我需要一个“右键单击事件”来突出显示单元格行。
I am using a JTable inside a ScrollPane in Java Swing (Netbeans Matisse). I have a MouseClicked event listener on the JTable that does the following:
我在 Java Swing (Netbeans Matisse) 的 ScrollPane 中使用 JTable。我在 JTable 上有一个 MouseClicked 事件侦听器，它执行以下操作：
if (evt.getButton() == java.awt.event.MouseEvent.BUTTON3) {
System.out.println("Right Click");
JPopUpMenu.show(myJTable, evt.getX(), evt.getY())
}
The problem is... whenever I execute a right click on the JTable, the row isn't highlighted (I set the selection to rows only btw). I have looked for several setSelected() functions but could not find a suitable one. By default, left clicking automatically highlights the row. How do I set it up for right clicks?
问题是......每当我在 JTable 上执行右键单击时，该行不会突出显示（顺便说一句，我将选择设置为行）。我已经寻找了几个 setSelected() 函数，但找不到合适的函数。默认情况下，左键单击会自动突出显示该行。如何设置右键单击？
采纳答案by clamp
like this:
像这样：
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseReleased(MouseEvent e) {
int r = table.rowAtPoint(e.getPoint());
if (r >= 0 && r < table.getRowCount()) {
table.setRowSelectionInterval(r, r);
} else {
table.clearSelection();
}
int rowindex = table.getSelectedRow();
if (rowindex < 0)
return;
if (e.isPopupTrigger() && e.getComponent() instanceof JTable ) {
JPopupMenu popup = createYourPopUp();
popup.show(e.getComponent(), e.getX(), e.getY());
}
}
});
......
......
回答by Markus Weninger
The accepted answer does not take modifier keys like ctrlor shiftinto account, yet they indicate that the current selection should notbe replaced, but extended.
接受的答案并不需要修改键像ctrl或shift考虑，但他们表示，目前的选择应该不会被取代，但延长。
Also, I added multi-OS support by checking mousePressedandmouseReleased.
此外，我通过检查mousePressed和添加了多操作系统支持mouseReleased。
Following, you can find a complete example on how to adjust the selected rows, using the ListSelectionModel, including MouseEvent#getModifierschecks. After that, it is possible to open a (optional) JPopupMenu.
下面，您可以找到有关如何使用ListSelectionModel，包括MouseEvent#getModifiers检查调整所选行的完整示例。之后，可以打开一个（可选）JPopupMenu。
JPopupMenu contextMenu = new JPopupMenu();
// ...
// add elements to the popup menu
// ...
table.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
handleRowClick(e);
if (e.isPopupTrigger()) {
doPop(e);
} else {
hidePop();
}
}
@Override
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) {
doPop(e);
}
}
private void handleRowClick(MouseEvent e) {
ListSelectionModel selectionModel = table.getSelectionModel();
Point contextMenuOpenedAt = e.getPoint();
int clickedRow = table.rowAtPoint(contextMenuOpenedAt);
if (clickedRow < 0) {
// No row selected
selectionModel.clearSelection();
} else {
// Some row selected
if ((e.getModifiers() & InputEvent.SHIFT_MASK) == InputEvent.SHIFT_MASK) {
int maxSelect = selectionModel.getMaxSelectionIndex();
if ((e.getModifiers() & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK) {
// Shift + CTRL
selectionModel.addSelectionInterval(maxSelect, clickedRow);
} else {
// Shift
selectionModel.setSelectionInterval(maxSelect, clickedRow);
}
} else if ((e.getModifiers() & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK) {
// CTRL
selectionModel.addSelectionInterval(clickedRow, clickedRow);
} else {
// No modifier key pressed
selectionModel.setSelectionInterval(clickedRow, clickedRow);
}
}
}
private void doPop(MouseEvent e) {
if (table.getSelectedRowCount() == 0) {
return;
}
contextMenu.setVisible(true);
contextMenu.show(e.getComponent(), e.getX(), e.getY());
}
private void hidePop() {
contextMenu.setVisible(false);
}
});
