Swing全屏幕模式

也许用到的机会很少 但JDK还是为我们提供了这个的功能 像许多软件中的打印预览功能 还有某些文本编辑器中为了获得更大的编辑画面 也用到了Swing全屏幕模式 如果你有兴趣写一个像ACDSee这样的软件 使用Swing全屏幕模式可以让用户看到更大的图片画面

如何使用Swing全屏幕模式？

关键是java awt *里面的两个与显示设备有关的类 GraphicsEnvironment和GraphicsDevice

GraphicsEnvironment为Java应用程序提供了特定平台的 GraphicsDevice对象和 Font 对象集合 这些GraphicsDevice可以是各种本机和远端机器的资源 如屏幕 打印机或者是Image Buffer 甚至是Graphics D绘图方法的目标对象

而GraphicsDevice就是指特定的图形环境了 如屏幕和打印设备等 这样 我们就可以用GraphicsDevice来 *** 纵屏幕了 GraphicsDevice提供的setFullScreenWindow()方法就是设置全屏幕用的

由于GraphicsEnvironment的构造器是受保护的(protected) 我们不能直接构造一个GraphicsEnvironment 对象来获得GraphicsDevice对象 幸好它提供了getLocalGraphicsEnvironment()方法 用来获得一个 GraphicsEnvironment实例

GraphicsEnvironment ge = GraphicsEnvironment getLocalGraphicsEnvironment()

有了GraphicsEnvironment可以调用getDefaultScreenDevice方法获得当前的Swing全屏幕模式设备了

GraphicsDevice gd = ge getDefaultScreenDevice()

自己动手体验一下

有了上面的简介 写一个实例来体验一下吧

importjava awt Color

importjava awt Font

importjava awt Graphics

importjava awt GraphicsDevice

importjava awt GraphicsEnvironment

importjava awt event MouseAdapter

importjava awt event MouseEvent

importjavax swing JWindow

publicclassFullScreenTest{

publicstaticvoidmain(String[]args){

GraphicsEnvironmentGraphicsEnvironmentge=

GraphicsEnvironment getLocalGraphicsEnvironment()

GraphicsDevicegd=ge getDefaultScreenDevice()

FullScreenWindowmyWindow=newFullScreenWindow()

if(gd isFullScreenSupported())

gd setFullScreenWindow(myWindow)

else

System out println( Unsupportedfullscreen )

}

staticclassFullScreenWindowextendsJWindow{

publicFullScreenWindow(){

this addMouseListener(newMouseAdapter(){

publicvoidmousePressed(MouseEventevt){

quit()

}

})

}

publicvoidquit(){

this dispose()

}

publicvoidpaint(Graphicsg){

g setFont(newFont( Arial Font BOLD ))

g setColor(Color RED)

g drawString( 这是全屏幕模式 )

}

}

lishixinzhi/Article/program/Java/hx/201311/27030

public void this_windowLostFocus(WindowEvent e) {

this.requestFocus()

this.setLocation(0,0)

}

public void this_windowIconified(WindowEvent e) {

this.setExtendedState(JFrame.MAXIMIZED_BOTH)

}

Java代码

import java awt Color

import java awt DisplayMode

import java awt Font

import java awt Graphics

import javax swing JFrame

public class FullScreenTest extends JFrame {

public static void main(String[] args) {

DisplayMode displayMode

if (args length == ) {

displayMode = new DisplayMode(

Integer parseInt(args[ ])

Integer parseInt(args[ ])

Integer parseInt(args[ ])

DisplayMode REFRESH_RATE_UNKNOWN)

}

else {

displayMode = new DisplayMode(

DisplayMode REFRESH_RATE_UNKNOWN)

}

FullScreenTest test = new FullScreenTest()

test run(displayMode)

}

private static final long DEMO_TIME =

public void run(DisplayMode displayMode) {

setBackground(Color blue)

setForeground(Color white)

setFont(new Font( Dialog Font PLAIN ))

SimpleScreenManager screen = new SimpleScreenManager()

try {

screen setFullScreen(displayMode this)

try {

Thread sleep(DEMO_TIME)

}

catch (InterruptedException ex) { }

}

finally {

screen restoreScreen()

}

}

public void paint(Graphics g) {

g drawString( Hello World! )

}

}

Java代码

import java awt DisplayMode

import java awt GraphicsDevice

import java awt GraphicsEnvironment

import java awt Window

import javax swing JFrame

/**

* The SimpleScreenManager class manages initializing and displaying full screen

* graphics modes

*/

public class SimpleScreenManager {

private GraphicsDevice device

/**

* Creates a new SimpleScreenManager object

*/

public SimpleScreenManager() {

GraphicsEnvironment environment = GraphicsEnvironment

getLocalGraphicsEnvironment()

device = environment getDefaultScreenDevice()

}

/**

* Enters full screen mode and changes the display mode

*/

public void setFullScreen(DisplayMode displayMode JFrame window) {

window setUndecorated(true)

window setResizable(false)

device setFullScreenWindow(window)

if (displayMode != null &&device isDisplayChangeSupported()) {

try {

device setDisplayMode(displayMode)

} catch (IllegalArgumentException ex) {

// ignore illegal mode for this device

}

}

}

/**

* Returns the window currently used in full screen mode

*/

public Window getFullScreenWindow() {

return device getFullScreenWindow()

}

/**

* Restores the screen s display mode

*/

public void restoreScreen() {

Window window = device getFullScreenWindow()

if (window != null) {

window dispose()

}

device setFullScreenWindow(null)

}

lishixinzhi/Article/program/Java/hx/201311/26128

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