我正在为我的游戏设置屏幕管理器，但它没有按我的意愿工作。我开发了在传递给此屏幕管理器的 JFrame 上在全屏和窗口之间切换的方法，但它给了我不应该存在的错误。为了获得独家全屏，我想通过移除框架上的装饰setUndecorated，这需要框架不可见。所以我setVisible(false)在任何之前申请，setUndecorated但它没有任何效果。当打印输出清楚地显示框架不可见时，SetUndecorated 仍然抱怨可见性。
编辑：在与下面有用的评论者讨论时，我发现我的 bufferstrategys 内容在切换出全屏时完全丢失了，你如何避免这种情况？
Called from fullscreen before toggle, visible? false
Called from fullscreen after toogle, visible? false
Called from windowed before toggle, visible? true
Exception in thread "main" java.awt.IllegalComponentStateException:
The frame is displayable.
at java.awt.Frame.setUndecorated(Unknown Source)
at gfx.ScreenManager.setWindowed(ScreenManager.java:100)
at gfx.ScreenManager.main(ScreenManager.java:145)
Called from windowed after toggle before decorated, visible? false
我的屏幕管理器的当前迭代：
package gfx;
import java.awt.DisplayMode;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;
public class ScreenManager {
private JFrame frame;
private GraphicsDevice gd;
private DisplayMode defaultMode;
private DisplayMode[] supportedModes;
// Use with frame from elsewhere
public ScreenManager(JFrame frame) {
this();
this.frame = frame;
}
// Used with a frame that is tied to instance
public ScreenManager() {
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
this.gd = ge.getDefaultScreenDevice();
this.defaultMode = new DisplayMode(800, 600, 16, 60);
this.setSupportedModes();
this.frame = new JFrame();
}
// Get the supported displayrates from current graphicsdevice
private void setSupportedModes() {
this.supportedModes = gd.getDisplayModes();
}
// Check if the supplied displaymode is supported by current device
public boolean isSupportedDisplayMode(DisplayMode odm) {
for (DisplayMode dm : this.supportedModes) {
if (dm.getHeight() == odm.getHeight()
&& dm.getWidth() == odm.getWidth()
&& dm.getBitDepth() == odm.getBitDepth()
|| odm.getBitDepth() == DisplayMode.BIT_DEPTH_MULTI
&& dm.getRefreshRate() == odm.getBitDepth()
|| odm.getRefreshRate() == DisplayMode.REFRESH_RATE_UNKNOWN)
return true;
}
return false;
}
public void setFullScreen(DisplayMode displayMode) {
this.setFullScreen(displayMode, frame);
}
// Set fullscreen if supported displaymode, else default displaymode
public void setFullScreen(DisplayMode displayMode, JFrame frame) {
if (gd.isFullScreenSupported()) {
// Fullscreen on visible frame not allowed
System.out
.println("Called from fullscreen before toggle, visible? "
+ frame.isVisible());
frame.setVisible(false);
System.out.println("Called from fullscreen after toogle, visible? "
+ frame.isVisible());
// Remove decoration and unresiable
frame.setUndecorated(true);
frame.setResizable(false);
frame.setIgnoreRepaint(true);
// Set frame as fullscreenwindow
gd.setFullScreenWindow(frame);
// Set default if requested not supported or null
if (displayMode == null || !isSupportedDisplayMode(displayMode))
gd.setDisplayMode(defaultMode);
else
gd.setDisplayMode(displayMode);
// Create bufferstrategy
frame.createBufferStrategy(2);
}
}
// Make windowed
public void setWindowed() {
// Windowed from fullscreen if fullscreen, otherwise we are probably
// windowed already
if (gd.getFullScreenWindow() != null) {
System.out.println("Called from windowed before toggle, visible? "
+ frame.isVisible());
frame.setVisible(false);
System.out
.println("Called from windowed after toggle before decorated, visible? "
+ frame.isVisible());
frame.setUndecorated(false);
frame.setVisible(true);
frame.setIgnoreRepaint(false);
gd.setFullScreenWindow(null);
// gd.getFullScreenWindow().dispose(); < Clears frame, you lose all
// info, da fuck is the point of this except on gamexit from
// fullscreen?
}
}
// Get the drawing graphics of this ScreenManagers bufferstrategy
public Graphics2D getGraphics() {
Window frame = gd.getFullScreenWindow();
if (frame != null) {
BufferStrategy bufferStrategy = frame.getBufferStrategy();
return (Graphics2D) bufferStrategy.getDrawGraphics();
}
return null;
}
public void update() {
Window frame = gd.getFullScreenWindow();
if (frame != null) {
BufferStrategy bufferStrategy = frame.getBufferStrategy();
if (!bufferStrategy.contentsLost())
bufferStrategy.show();
}
Toolkit.getDefaultToolkit().sync();
}
// Display in readable format, eg 800x600x32@60
public String displayModeToString(DisplayMode dm) {
return dm.getWidth() + "x" + dm.getHeight() + "x" + dm.getBitDepth()
+ "@" + dm.getRefreshRate();
}
public static void main(String[] args) throws InterruptedException {
JFrame frame = new JFrame();
frame.setSize(800, 600);
ScreenManager sm = new ScreenManager(frame);
sm.setFullScreen(new DisplayMode(1680, 1050, 32, 60));
Thread.sleep(3000);
sm.setWindowed();
}
有趣的方法是 setWindowed 和 setFullScreen。
编辑：对于下面的评论，这个新的 main 在全屏缓冲区上绘制一个字符串，显示它，然后在退出全屏时它完全消失了，这不需要处理，也不需要担心装饰。考虑到我首先进入全屏模式并且全屏方法创建了一个附加到 JFrame 的缓冲区，所以这很奇怪，因此即使我离开全屏模式，JFrame 现在也附加了一个缓冲区策略。所以缓冲区内容在转换之间由于某种原因丢失了..
// Make windowed
public void setWindowed() {
// Windowed from fullscreen if fullscreen, otherwise we are probably
// windowed already
if (gd.getFullScreenWindow() != null) {
// gd.getFullScreenWindow().dispose();
gd.setFullScreenWindow(null);
// frame.setUndecorated(false);
frame.setVisible(true);
}
}
public static void main(String[] args) throws InterruptedException {
JFrame frame = new JFrame();
frame.setSize(800, 600);
ScreenManager sm = new ScreenManager(frame);
sm.setFullScreen(new DisplayMode(1680, 1050, 32, 60));
Graphics2D g2d = sm.getGraphics();
g2d.setColor(Color.red);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Font font = new Font("Serif", Font.PLAIN, 96);
g2d.setFont(font);
g2d.drawString("jade", 40, 120);
g2d.dispose();
sm.update();
Thread.sleep(3000);
sm.setWindowed();
}