Question

java中swt如何实现跑马灯的效果

Answer 1

Java中swt界面设计跑马灯

import org.eclipse.swt.*;

import org.eclipse.swt.graphics.*;

import org.eclipse.swt.widgets.*;

public class TestMove {

private boolean stop;

private String str;

private int mx,x,width;

private Rectangle clientArea;

private Canvas canvas;

private int step=1;

private int speed = 40;

private Shell shell = null;

private Color color = null;

private int fontSize = 20;

private String fontName = "幼圆";

private Display display = null;

GC gc;

public TestMove(Display display,Shell shell,String soucestr){

this.display = display;

this.shell = shell;

canvas = new Canvas(shell,SWT.NONE);

gc=new GC(canvas);

stop=true;

clientArea=shell.getClientArea();

mx=clientArea.width;

x=mx;

str=soucestr;

width=strlen(soucestr);

color = display.getSystemColor(SWT.COLOR_BLUE);

FontData fd = new FontData(fontName,fontSize,SWT.NORMAL);

Font font = new Font(canvas.getDisplay(),fd);

gc.setForeground(color);

gc.setFont(font);

start(display);

}

public void setFontSize(int size){

fontSize = size;

FontData fd = new FontData(fontName,fontSize,SWT.NORMAL);

Font font = new Font(canvas.getDisplay(),fd);

gc.setFont(font);

}

public void setFontName(String fontName){

this.fontName = fontName;

FontData fd = new FontData(fontName,fontSize,SWT.NORMAL);

Font font = new Font(canvas.getDisplay(),fd);

gc.setFont(font);

}

public void setColor(int c){

if(c>=1&&c<=16){

color = display.getSystemColor(c);

gc.setForeground(color);

}

}

public void setColor(Color c){

this.color = c;

gc.setForeground(color);

}

public void setSpeed(int speed){

this.speed = speed;

}

public void setString(String str){

this.str = str;

width=strlen(str);

}

public void refreshClientArea(){

this.clientArea = shell.getClientArea();

mx = clientArea.width;

x=mx;

}

private int strlen(String str){

int strwidth=0;

for (int i = 0; i < str.length(); i++) {

char c = str.charAt(i);

strwidth += gc.getAdvanceWidth(c);

}

return strwidth;

}

public void start(Display display){

new BackgroundThread(display).start();

}

class BackgroundThread extends Thread{

private Display display;

public BackgroundThread(Display display){

this.display=display;

};

public void run(){

while(true){

if(stop){

display.syncExec(new Runnable(){

public void run(){

if(width<=clientArea.width)

{

if(mx>0)

{

gc.drawString(str, mx, 0);

}

else

{

gc.drawString(str, mx, 0);

gc.drawString(str, x, 0);

if(mx==-width)

{

mx=x+step;

x=clientArea.width;

}

else

{

x-=step;

}

}

mx-=step;

}

else

{

gc.drawString(str, mx, 0);

if(mx>-width)

{

mx-=step;

}

else

{

mx=clientArea.width;

}

}

}

});

}

try{

Thread.sleep(speed);

}catch(Exception e){

e.printStackTrace();

}

}

}

}

public void pause(){

stop=false;

}

public void resume(){

stop=true;

}

}

追问

有点没看懂啊 能不能给个方法让我运行一下