这就是我在Windows平台设置中移动和重新调整Windows大小的方式。这是我的一些USER32 JNA的Windows代码库的一小部分:
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import javax.swing.*;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.win32.StdCallLibrary;
@SuppressWarnings("serial")
public class TestMoveWindow extends JPanel {
public static final String[] BOUNDS_NAMES = { "x", "y", "w", "h" };
private JTextField windowNameField = new JTextField(15);
private JTextField[] boundsFields = new JTextField[BOUNDS_NAMES.length];
public TestMoveWindow() {
JPanel winNamePanel = new JPanel();
winNamePanel.add(new JLabel("Window Name:"));
winNamePanel.add(windowNameField);
JPanel boundsPanel = new JPanel(new GridLayout(1, 0, 5, 0));
for (int i = 0; i < BOUNDS_NAMES.length; i++) {
JPanel fieldPanel = new JPanel();
fieldPanel.add(new JLabel(BOUNDS_NAMES[i] + ":"));
boundsFields[i] = new JTextField(3);
fieldPanel.add(boundsFields[i]);
boundsPanel.add(fieldPanel);
}
JPanel btnPanel = new JPanel();
Action doItAction = new AbstractAction("Do it!") {
@Override
public void actionPerformed(ActionEvent e) {
String startOfWindowName = windowNameField.getText().trim();
Pointer hWnd = JnaUtil.getWinHwnd(startOfWindowName);
if (hWnd == null || startOfWindowName.isEmpty()) {
String message = String.format(
"Window named \"%s\" was not found", startOfWindowName);
JOptionPane.showMessageDialog(TestMoveWindow.this, message,
"Window Not Found", JOptionPane.ERROR_MESSAGE);
return;
}
int x = 0;
int y = 0;
int w = 0;
int h = 0;
String xStr = boundsFields[0].getText();
String yStr = boundsFields[1].getText();
String wStr = boundsFields[2].getText();
String hStr = boundsFields[3].getText();
try {
x = Integer.parseInt(xStr);
y = Integer.parseInt(yStr);
w = Integer.parseInt(wStr);
h = Integer.parseInt(hStr);
} catch (NumberFormatException e1) {
String message = String
.format(
"Numbers cannot be parsed: \"%s\", \"%s\", \"%s\", \"%s\"",
xStr, yStr, wStr, hStr);
JOptionPane.showMessageDialog(TestMoveWindow.this, message,
"Numbers Not Parseable", JOptionPane.ERROR_MESSAGE);
return;
}
JnaUtil.moveWindow(hWnd, x, y, w, h);
}
};
btnPanel.add(new JButton(doItAction));
windowNameField.addActionListener(doItAction);
for (JTextField boundField : boundsFields) {
boundField.addActionListener(doItAction);
}
setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
add(winNamePanel);
add(boundsPanel);
add(btnPanel);
}
private static void createAndShowGui() {
JFrame frame = new JFrame("Test Move Window");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new TestMoveWindow());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
class JnaUtil {
private static final User32 user32 = User32.INSTANCE;
private static Pointer callBackHwnd;
public static Pointer getWinHwnd(final String startOfWindowName) {
callBackHwnd = null;
user32.EnumWindows(new User32.WNDENUMPROC() {
@Override
public boolean callback(Pointer hWnd, Pointer userData) {
byte[] windowText = new byte[512];
user32.GetWindowTextA(hWnd, windowText, 512);
String wText = Native.toString(windowText).trim();
if (!wText.isEmpty() && wText.startsWith(startOfWindowName)) {
callBackHwnd = hWnd;
return false;
}
return true;
}
}, null);
return callBackHwnd;
}
public static boolean moveWindow(Pointer hWnd, int x, int y, int nWidth,
int nHeight) {
boolean bRepaint = true;
return user32.MoveWindow(hWnd, x, y, nWidth, nHeight, bRepaint);
}
}
interface User32 extends StdCallLibrary {
User32 INSTANCE = (User32) Native.loadLibrary("user32", User32.class);
interface WNDENUMPROC extends StdCallCallback {
boolean callback(Pointer hWnd, Pointer arg);
}
boolean EnumWindows(WNDENUMPROC lpEnumFunc, Pointer userData);
boolean MoveWindow(Pointer hWnd, int x, int y, int nWidth, int nHeight,
boolean bRepaint);
int GetWindowTextA(Pointer hWnd, byte[] lpString, int nMaxCount);
}
这就要求你必须从你的classpath的JNA库jna.jar和platform.jar。而且,这仅适用于Windows平台。代码的第一部分,TestMoveWindow只是一个用于演示程序如何工作的测试GUI,它实际上只不过是对JnaUtil.moveWindow(hWnd, x, y, w, h);
的调用,但代码的“肉”是我的JnaUtil类和User32接口。 JNA图书馆做这个所以容易,这是荒谬的。为了让我的代码正常工作,您还需要知道窗口文本的开始 - 通常是网页的标题 - 以便它可以获得指向窗口的指针。
我真的不知道是否存在任何跨平台的解决方案。我想认为有,但我有点怀疑,因为我相信这总是需要系统调用,但我很想证明是错误的!
我知道一个平台相关的解决方案,但只适用于Windows,它需要JNA或JNI。 –
我需要它是跨平台的,但我对你的方法很感兴趣。 –
感谢编辑Dimo。 –