這就是我在Windows平臺設置中移動和重新調整Windows大小的方式。這是我的一些USER32 JNA的Windows代碼庫的一小部分:
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);
}
這就要求你必須從你的classpath的JNA庫jna.jar和platform.jar。而且,這僅適用於Windows平臺。代碼的第一部分,TestMoveWindow只是一個用於演示程序如何工作的測試GUI,它實際上只不過是對JnaUtil.moveWindow(hWnd, x, y, w, h);
的調用,但代碼的「肉」是我的JnaUtil類和User32接口。 JNA圖書館做這個所以容易,這是荒謬的。爲了讓我的代碼正常工作,您還需要知道窗口文本的開始 - 通常是網頁的標題 - 以便它可以獲得指向窗口的指針。
我真的不知道是否存在任何跨平臺的解決方案。我想認爲有,但我有點懷疑,因爲我相信這總是需要系統調用,但我很想證明是錯誤的!
我知道一個平臺相關的解決方案,但只適用於Windows,它需要JNA或JNI。 –
我需要它是跨平臺的,但我對你的方法很感興趣。 –
感謝編輯Dimo。 –