我在按钮中显示图像,单击该按钮会打开一个复合图像,使我可以选择另一张图片用于该按钮.执行保存操作后,下面的代码将调整图片大小并将其保存到目录中.然后加载重新加载复合材料.当组合加载时,按钮会根据用户正在查看的记录的ID从默认位置拉出其图像.我遇到的问题是,除非关闭并重新加载应用程序,否则按钮上的图像将保持不变.需要注意的一件有趣的事是,当加载默认按钮图像时(即,没有为其ID保存图片),按钮图像会按其应有的方式进行更改,而只是第一次更改.

希望我已经足够清楚地描述了我的问题,如果您需要我澄清一下,请发表评论.

-保存按钮的代码-

Button btnSave = new Button(this, SWT.NONE);

btnSave.addSelectionListener(new SelectionAdapter() {

@Override

public void widgetSelected(SelectionEvent e) {

String path = txtPhotoPath.getText();

if (CC_Files.fileExists(path)) {

ArrayList picTypes = new ArrayList();

picTypes.add(".jpg");

picTypes.add(".png");

picTypes.add(".gif");

int t = 0;

for(int i = 0; i < picTypes.size(); i++){

String s = picTypes.get(i);

if(path.contains(s.toUpperCase())){

t++;

}

if(path.contains(s.toLowerCase())){

t++;

}

}

if (t > 0) {

Image image = (Image) SWTResourceManager.getImage(path);

ImageData imgData = image.getImageData();

int intH = image.getBounds().height;

int intW = image.getBounds().width;

int h = (150 * intH) / intW;

int w = 150;

if (h > 150){

h = 150;

w = (150 * intW) / intH;

}

imgData = imgData.scaledTo(w, h);

ImageLoader imageLoader = new ImageLoader();

imageLoader.data = new ImageData[] { imgData };

imageLoader.save(Variables.getStrResources()

+ "Pics\" + a.getHerd_id() + ".jpg",

SWT.IMAGE_JPEG);

try {

Frm_Animal.setAnimalEditSC(Frm_Animal

.createAnimalComp(a));

} catch (Exception e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

}

}

});

GridData gd_btnSave = new GridData(SWT.LEFT, SWT.CENTER, false, false,

1, 1);

gd_btnSave.widthHint = 60;

btnSave.setLayoutData(gd_btnSave);

btnSave.setText("Save");

—在复合中创建按钮的代码—

Button btnPic = new Button(composite, SWT.CENTER);

btnPic.addSelectionListener(new SelectionAdapter() {

@Override

public void widgetSelected(SelectionEvent e) {

try {

Comp_Add_Photo photo = new Comp_Add_Photo(

scrolledComposite, SWT.FILL, a);

setAnimalEditSC(photo);

} catch (Exception e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

}

});

Image image = null;

String strPic = Variables.getStrResources() + "Pics\" + a.getHerd_id() +".jpg";

if(CC_Files.fileExists(strPic)){

image = (Image) SWTResourceManager

.getImage(strPic);

}else {

image = (Image) SWTResourceManager

.getImage(Variables.getStrResources() + "black_cow.png");

}

btnPic.setImage(image);

btnPic.setToolTipText("Click Here To Add Photo");

GridData gd_btnPic = new GridData(SWT.CENTER, SWT.CENTER, false, false,

1, 7);

gd_btnPic.heightHint = 160;

gd_btnPic.widthHint = 160;

btnPic.setLayoutData(gd_btnPic);