小编Eug*_*eca的帖子

我正在尝试修改JavaFx 8中的TabPage控件,使其向视口显示当前所选选项卡前面(右侧)的一些选项卡,或者如果所选选项卡位于标题的最左侧,则显示在当前标签之前的附近标签.

现在怎么样:

我是如何尝试使它表现得像:

当用户选择索引X的选项卡时,选项卡窗格标题会显示另外2或3个附近的选项卡.

这是我到目前为止所尝试的,没有成功,显然代码下面太快,无法使接口线程按时同步选项卡选项(想法是提前选择一个选项卡,然后回退到用户选择的选项卡,使标题显示选定选项卡后的选项卡):

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;

public class TabSelectionListener implements ChangeListener<Tab> {

    protected TabPane owner;
    protected boolean lock;
    protected int nextItems;

    TabSelectionListener(TabPane listenTo){
        owner = listenTo;
        lock = false;
        nextItems = 2;
    }

    TabSelectionListener(TabPane listenTo, int minimalInFront){
        owner = listenTo;
        lock = false;
        nextItems = minimalInFront;
    }

    @Override
    public void changed(ObservableValue<? extends Tab> list, Tab old, Tab newT) {
        int maxTab;
        int curTab;
        int i;

        // Locks this listener, because the selections …

错误:

08-15 12:59:17.435: E/Google Maps Android API(14665): Failed to load map. Error contacting Google servers. This is probably an authentication issue (but could be due to network errors).

Google控制台:

清单:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.cefetmgrdctcc.sgtp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <permission
        android:name="com.cefetmgrdctcc.sgtp.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <uses-permission android:name="com.cefetmgrdctcc.sgtp.permission.MAPS_RECEIVE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>    

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="Hidden key"/>
        <activity
            android:name="com.cefetmgrdctcc.sgtp.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action …