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我试图使我的JFrame
使用下面的代码在Mac OSX上的我的扩展坞旁边显示,但它不起作用。是否有可能让框架出现在那里?我正在使用Java。这可以在Mac OSX上实现吗?
frame.setLocation(5, Toolkit.getDefaultToolkit().getScreenSize().height-45);
我试图使我的JFrame
使用下面的代码在Mac OSX上的我的扩展坞旁边显示,但它不起作用。是否有可能让框架出现在那里?我正在使用Java。这可以在Mac OSX上实现吗?
frame.setLocation(5, Toolkit.getDefaultToolkit().getScreenSize().height-45);
是的,但你需要利用GraphicsDevice
的,GraphicsEnvironment
和GraphicsConfiguration
APIs
Toolkit#getScreenSize
只是临时T,它返回屏幕的尺寸,但它并没有包括所有的操作系统元素,如码头,它占用额外的空间
所以,这是一帮库代码,设计找到GraphicsDevice
特定组件驻留,或者默认GraphicsDevice
...库中的代码;)
public static Rectangle getDefaultScreenBounds() {
return getScreenBounds(null, true);
}
public static Rectangle getScreenBounds(Component comp, boolean acceptDefault) {
Rectangle bounds = getScreenBounds(comp);
if ((bounds == null || (bounds.x == 0 && bounds.y == 0 && bounds.width == 0 && bounds.height == 0)) && acceptDefault) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
bounds = gd.getDefaultConfiguration().getBounds();
}
return bounds;
}
public static Rectangle getScreenBounds(Component comp) {
Rectangle bounds = new Rectangle(0, 0, 0, 0);
GraphicsDevice gd = getGraphicsDevice(comp);
if (gd != null) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
bounds = gc.getBounds();
}
return bounds;
}
public static GraphicsDevice getGraphicsDevice(Component comp) {
GraphicsDevice device = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice lstGDs[] = ge.getScreenDevices();
List<GraphicsDevice> lstDevices = new ArrayList<>(lstGDs.length);
if (comp != null && comp.isVisible()) {
Rectangle parentBounds = comp.getBounds();
/*
* If the component is not a window, we need to find its location on the
* screen...
*/
if (!(comp instanceof Window)) {
Point p = new Point(0, 0);
SwingUtilities.convertPointToScreen(p, comp);
parentBounds.setLocation(p);
}
for (GraphicsDevice gd : lstGDs) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Rectangle screenBounds = gc.getBounds();
if (screenBounds.intersects(parentBounds)) {
lstDevices.add(gd);
}
}
if (lstDevices.size() == 1) {
device = lstDevices.get(0);
} else {
GraphicsDevice gdMost = null;
float maxArea = 0;
for (GraphicsDevice gd : lstDevices) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Rectangle bounds = gc.getBounds();
Rectangle2D intBounds = bounds.createIntersection(parentBounds);
float perArea = (float) ((intBounds.getWidth() * intBounds.getHeight())/(parentBounds.width * parentBounds.height));
if (perArea > maxArea) {
maxArea = perArea;
gdMost = gd;
}
}
if (gdMost != null) {
device = gdMost;
}
}
}
return device;
}
而且,这是如何使用它...
package javaapplication1.pkg169;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Window;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
Rectangle bounds = getDefaultScreenBounds();
System.out.println(bounds);
int x = bounds.x + ((bounds.width - frame.getWidth())/2);
frame.setLocation(x, bounds.y + (bounds.height - frame.getHeight()));
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
public static Rectangle getDefaultScreenBounds() {
return getScreenBounds(null, true);
}
public static Rectangle getScreenBounds(Component comp, boolean acceptDefault) {
Rectangle bounds = getScreenBounds(comp);
if ((bounds == null || (bounds.x == 0 && bounds.y == 0 && bounds.width == 0 && bounds.height == 0)) && acceptDefault) {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
bounds = gd.getDefaultConfiguration().getBounds();
}
return bounds;
}
public static Rectangle getScreenBounds(Component comp) {
Rectangle bounds = new Rectangle(0, 0, 0, 0);
GraphicsDevice gd = getGraphicsDevice(comp);
if (gd != null) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
bounds = gc.getBounds();
}
return bounds;
}
public static GraphicsDevice getGraphicsDevice(Component comp) {
GraphicsDevice device = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice lstGDs[] = ge.getScreenDevices();
List<GraphicsDevice> lstDevices = new ArrayList<>(lstGDs.length);
if (comp != null && comp.isVisible()) {
Rectangle parentBounds = comp.getBounds();
/*
* If the component is not a window, we need to find its location on the
* screen...
*/
if (!(comp instanceof Window)) {
Point p = new Point(0, 0);
SwingUtilities.convertPointToScreen(p, comp);
parentBounds.setLocation(p);
}
for (GraphicsDevice gd : lstGDs) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Rectangle screenBounds = gc.getBounds();
if (screenBounds.intersects(parentBounds)) {
lstDevices.add(gd);
}
}
if (lstDevices.size() == 1) {
device = lstDevices.get(0);
} else {
GraphicsDevice gdMost = null;
float maxArea = 0;
for (GraphicsDevice gd : lstDevices) {
GraphicsConfiguration gc = gd.getDefaultConfiguration();
Rectangle bounds = gc.getBounds();
Rectangle2D intBounds = bounds.createIntersection(parentBounds);
float perArea = (float) ((intBounds.getWidth() * intBounds.getHeight())/(parentBounds.width * parentBounds.height));
if (perArea > maxArea) {
maxArea = perArea;
gdMost = gd;
}
}
if (gdMost != null) {
device = gdMost;
}
}
}
return device;
}
}
我看着你的代码和真相被告知我不太了解Graphics Environment,但我确实发现了这一点:1.从我在你添加的图片中看到的,框架仍然出现在码头上方2.如果我改变将框架设置为“未修饰”,然后框架可以通过设置其位置出现在码头的旁边和后面。那么,你认为OSX限制装饰帧的边界在码头之上吗?对不起,我很难理解Graphics,因为我是新手。无论哪种方式你的答案是完整的,并帮助我了解了很多,所以我接受它。 – Lae