代号一中工具栏中的无限旋转命令（或按钮）

Question

我想 'infinite' 在 Codename One Toolbar 中旋转我的命令（刷新命令）（直到加载完成，然后我想停止旋转，但图像仍然有可见）。我可以更改图标以使其开始旋转吗？我怎样才能达到这个结果？

旋转的图标在旋转时应该是不可点击的，但实现起来应该不难。

Answer 1

您可以使用工具栏 API 和一些技巧。我创建了以下方法来做到这一点：

private void showTitleProgress(Toolbar t) {
    int pos = t.getComponentCount() - 1; //If you have a command on the left like back command
    //int pos = t.getComponentCount(); //If you don't have a command on the left like back command
    InfiniteProgress ip = new InfiniteProgress();
    ip.setAnimation(YourProgressImage);
    ip.setUIID("icon");
    Container contIp = FlowLayout.encloseCenterMiddle(ip);

    Component.setSameWidth(t.getComponentAt(pos), contIp);
    Component.setSameHeight(t.getComponentAt(pos), contIp);
    t.replaceAndWait(t.getComponentAt(pos), contIp, null);
    t.revalidate();
}

private void hideTitleProgress(Toolbar t, Command cmd) {
    int pos = t.getComponentCount() - 1; //If you have a command on the left like back command
    //int pos = t.getComponentCount(); //If you don't have a command on the left like back command
    Button cmdButton = new Button(cmd.getIcon());
    cmdButton.setUIID("TitleCommand");
    cmdButton.setCommand(cmd);
    t.replaceAndWait(t.getComponentAt(pos), cmdButton, null);
    t.getComponentForm().revalidate();
}

将其与工具栏 API 一起使用，您的表单如下所示：

private Command myCommand = new Command("");
Form f = new Form("Test form");
Toolbar t = new Toolbar();
f.setToolbar(t);

Command back = new Command("Back") {

    @Override
    public void actionPerformed(ActionEvent evt) {
       //Do stuff
    }
};
back.putClientProperty("uiid", "BackCommand");
f.setBackCommand(back);
t.addCommandToLeftBar(back);

myCommand = new Command(YourProgressImage) {

    @Override
    public void actionPerformed(ActionEvent evt) {
        //To show the progress when some actions are being performed 
        showTitleProgress(t);
        //When you're done, discard the progress and restore your command
        hideTitleProgress(t, myCommand);
    }
}
myCommand.putClientProperty("TitleCommand", true);
t.addCommandToRightBar(myCommand);
f.show();

代号一中工具栏中的无限旋转命令（或按钮）

Infinite Rotation Command (or button) in toolbar in Codename One

java

toolbar

infinite

codenameone