好莫寧大家小部件配置
我有一個主屏,具有如下鍵綁定:
shell.getDisplay().addFilter(SWT.KeyUp, new Listener() {
@Override
public void handleEvent(Event event) {
switch (event.keyCode) {
case SWT.ESC:
shell.close();
break;
case SWT.F12:
display.syncExec(new Runnable() {
@Override
public void run() {
new Venda(shell);
}
});
break;
default:
break;
}
}
});
當推F12,搜索的屏幕被打開。銷售屏幕的構造商:
public Venda(Shell parent) {
super(parent);
this.shell = new Shell(getParent(),SWT.APPLICATION_MODAL);
this.display = getParent().getDisplay();
this.shell.setMaximized(true);
this.shell.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_DARK_GREEN));
this.fontText = new Font(shell.getDisplay(), new FontData("Arial", 28, SWT.NORMAL));
this.fontLabel = new Font(shell.getDisplay(), new FontData("Arial", 13, SWT.NORMAL));
this.shell.setText("Cupom Fiscal - Venda Produto");
this.criaCampos();
this.configuraTeclaAtalho();
this.shell.open();
while (!display.isDisposed()) {
if (!display.isDisposed() && !display.readAndDispatch()) {
display.sleep();
}
}
}
當在銷售屏幕上按下F3時,搜索屏幕打開。我的問題是:第一次打開銷售屏幕時,搜索屏幕正常工作,但是如果銷售屏幕關閉並再次打開,搜索屏幕沒有工作,投射錯誤:處理Widget。 錯誤發生在第02行,源代碼如下。 變量「abreFechaCaixa」驗證是否應打開銷售屏幕。
if(!abreFechaCaixa){
MessageBox msg = new MessageBox(shell, SWT.ICON_WARNING | SWT.YES | SWT.NO);
msg.setMessage("Caixa Fechado, deseja abrir?");
msg.setText(shell.getText());
if(msg.open() == SWT.YES){
abreCaixa();
}
}
if(abreFechaCaixa){
display.syncExec(new Runnable() {
@Override
public void run() {
new Consulta(shell,"Cupom Fiscal - Consulta Produto");
}
});
}
構造的搜索屏幕:
public Consulta(Shell parent) {
super(parent);
this.shell = new Shell(parent, SWT.APPLICATION_MODAL);
this.display = getParent().getDisplay();
this.shell.setText(tituloTela);
this.shell.setLayout(new GridLayout(1, false));
this.fontText = new Font(shell.getDisplay(), new FontData("Arial", 28, SWT.NORMAL));
this.fontLabel = new Font(shell.getDisplay(), new FontData("Arial", 13, SWT.NORMAL));
this.criaCampos();
this.shell.pack();
this.centralizaTela();
this.shell.open();
while (!shell.isDisposed()) {
if (!display.isDisposed() && !display.readAndDispatch()) {
display.sleep();
}
}
}
你能幫我解決這個問題? 或者顯示關閉SWT窗口的最佳方法? 謝謝!