JavaFX自定义列表视图
我想问一下在JavaFX中使用自定义对象创建ListView的最佳方法,我想要一个列表,每个项目如下所示: 我搜索发现大多数人都是用细胞工厂的方法来做的。还有别的办法吗?例如,使用custome fxml 这是我的fmxl档案JavaFX自定义列表视图,java,listview,javafx,cellrenderer,Java,Listview,Javafx,Cellrenderer,我想问一下在JavaFX中使用自定义对象创建ListView的最佳方法,我想要一个列表,每个项目如下所示: 我搜索发现大多数人都是用细胞工厂的方法来做的。还有别的办法吗?例如,使用custome fxml 这是我的fmxl档案 <?xml version="1.0" encoding="UTF-8"?> <?import javafx.scene.control.ListView?> <?import javafx.scene.control.Menu?>
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.ListView?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.SplitPane?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="557.0" prefWidth="1012.0" style="-fx-background-color: #0288D1;" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="desktop_tasker.FXMLTaskerController">
<children>
<SplitPane dividerPositions="0.5" layoutX="-8.0" layoutY="35.0" prefHeight="529.0" prefWidth="1027.0" style="-fx-background-color: #EEEEEE;" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="28.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<ListView fx:id="list_todo" onEditStart="#handleButtonAction" prefHeight="527.0" prefWidth="502.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
</children></AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="527.0" prefWidth="640.0">
<children>
<ListView fx:id="list_done" onEditStart="#handleButtonAction" prefHeight="527.0" prefWidth="502.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
</children></AnchorPane>
</items>
</SplitPane>
<MenuBar prefHeight="30.0" prefWidth="1012.0">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
</children>
</AnchorPane>
这是我的目标任务:
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Created by Usuario on 26/10/2017.
*/
public class Task implements Comparable<Task> {
private String title;
private String attendant;
private String comment;
private String description;
private int priority;
private String creationDate;
private boolean state;
private boolean visible;
public Task(String title, String attendant, String comment, String description, int priority) {
this.title = title;
this.attendant = attendant;
this.comment = comment;
this.description = description;
this.priority = priority;
this.creationDate = setCreationDate();
this.state = false;
this.visible = true;
}
public Task(String title, String attendant, String comment, String description, int priority, String date, boolean state, boolean visible) {
this.title = title;
this.attendant = attendant;
this.comment = comment;
this.description = description;
this.priority = priority;
this.creationDate = date;
this.state = state;
this.visible = visible;
}
private static String setCreationDate() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
return sdf.format(date);
}
public boolean isVisible() {
return visible;
}
public String getTitle() {
return title;
}
public String getAttendant() {
return attendant;
}
public String getComment() {
return comment;
}
public String getDescription() {
return description;
}
public int getPriority() {
return priority;
}
public String getCreationDate() {
return creationDate;
}
public boolean isState() {
return state;
}
@Override
public String toString() {
return "Task{" +
"title='" + title + '\'' +
", attendant='" + attendant + '\'' +
", comment='" + comment + '\'' +
", description='" + description + '\'' +
", priority=" + priority +
", creationDate='" + creationDate + '\'' +
", state=" + state +
'}';
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Task task = (Task) o;
if (priority != task.priority) return false;
if (state != task.state) return false;
if (title != null ? !title.equals(task.title) : task.title != null) return false;
if (attendant != null ? !attendant.equals(task.attendant) : task.attendant != null)
return false;
if (comment != null ? !comment.equals(task.comment) : task.comment != null) return false;
if (description != null ? !description.equals(task.description) : task.description != null)
return false;
return creationDate != null ? creationDate.equals(task.creationDate) : task.creationDate == null;
}
@Override
public int hashCode() {
int result = title != null ? title.hashCode() : 0;
result = 31 * result + (attendant != null ? attendant.hashCode() : 0);
result = 31 * result + (comment != null ? comment.hashCode() : 0);
result = 31 * result + (description != null ? description.hashCode() : 0);
result = 31 * result + priority;
result = 31 * result + (creationDate != null ? creationDate.hashCode() : 0);
result = 31 * result + (state ? 1 : 0);
return result;
}
@Override
public int compareTo( Task task) {
int comparePrior = this.getPriority() - (task.getPriority());
return comparePrior == 0 ? this.getTitle().compareTo(task.getTitle()) : comparePrior;
}
}
import java.text.simpleDataFormat;
导入java.util.Date;
/**
*由Usuario于2017年10月26日创建。
*/
公共类任务实现了可比性{
私有字符串标题;
私人字符串助理;
私有字符串注释;
私有字符串描述;
私人优先权;
私有字符串创建日期;
私有布尔状态;
私有布尔可见;
公共任务(字符串标题、字符串助理、字符串注释、字符串描述、int优先级){
this.title=标题;
this.attendant=助理;
this.comment=注释;
this.description=描述;
优先权=优先权;
this.creationDate=setCreationDate();
this.state=false;
可见=真实;
}
公共任务(字符串标题、字符串助理、字符串注释、字符串描述、int优先级、字符串日期、布尔状态、布尔可见){
this.title=标题;
this.attendant=助理;
this.comment=注释;
this.description=描述;
优先权=优先权;
this.creationDate=日期;
this.state=状态;
可见的;可见的;
}
私有静态字符串setCreationDate(){
SimpleDataFormat sdf=新SimpleDataFormat(“yyyy-MM-dd”);
日期=新日期();
返回sdf.格式(日期);
}
公共布尔值可见(){
返回可见;
}
公共字符串getTitle(){
返回标题;
}
公共字符串getAttendant(){
回程服务员;
}
公共字符串getComment(){
回复评论;
}
公共字符串getDescription(){
返回说明;
}
public int getPriority(){
返回优先级;
}
公共字符串getCreationDate(){
还肌酐;
}
公共布尔isState(){
返回状态;
}
@凌驾
公共字符串toString(){
返回“任务{”+
“title=”+title+“\”+
“,attendant='”+attendant+'\''+
,comment=''+comment+'\''+
,description=''+description+'\''+
“,priority=“+优先级”+
“,creationDate=”“+creationDate+”\”+
“,state=“+状态+
'}';
}
@凌驾
公共布尔等于(对象o){
如果(this==o)返回true;
如果(o==null | | getClass()!=o.getClass())返回false;
任务任务=(任务)o;
if(priority!=task.priority)返回false;
如果(state!=task.state)返回false;
如果(title!=null?!title.equals(task.title):task.title!=null)返回false;
if(attendant!=null?!attendant.equals(task.attendant):task.attendant!=null)
返回false;
if(comment!=null?!comment.equals(task.comment):task.comment!=null)返回false;
if(description!=null?!description.equals(task.description):task.description!=null)
返回false;
返回creationDate!=null?creationDate.equals(task.creationDate):task.creationDate==null;
}
@凌驾
公共int hashCode(){
int result=title!=null?title.hashCode():0;
result=31*result+(attendant!=null?attendant.hashCode():0);
result=31*result+(comment!=null?comment.hashCode():0);
result=31*result+(description!=null?description.hashCode():0);
结果=31*结果+优先级;
result=31*result+(creationDate!=null?creationDate.hashCode():0);
结果=31*结果+(状态?1:0);
返回结果;
}
@凌驾
公共整数比较(任务){
int comparePrior=this.getPriority()-(task.getPriority());
返回comparePreor==0?this.getTitle().compareTo(task.getTitle()):comparePreor;
}
}
我希望这些物品看起来像单独的容器,但我没有找到任何方法。关于使用什么有什么建议吗?最好的方法是什么?这是一个使用
FXML
创建自定义ListCell
首先,创建一个控制器来继承ListCell
。在该控制器的构造函数中,我们在其视图上加载FXML
语句
public class TaskCell extends ListCell<Task> {
@FXML
private Label titleLabel;
@FXML
private Label commentLabel;
@FXML
private Label descriptionLabel;
public TaskCell() {
loadFXML();
}
private void loadFXML() {
try {
FXMLLoader loader = new FXMLLoader(getClass().getResource("task_cell.fxml"));
loader.setController(this);
loader.setRoot(this);
loader.load();
}
catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
protected void updateItem(Task item, boolean empty) {
super.updateItem(item, empty);
if(empty || item == null) {
setText(null);
setContentDisplay(ContentDisplay.TEXT_ONLY);
}
else {
titleLabel.setText(item.getTitle());
commentLabel.setText(item.getComment());
descriptionLabel.setText(item.getDescription());
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
}
}
}
我们可以在包含ListView
控件的视图的FXML
语句中描述它
<GridPane fx:controller="sample.Controller" xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
<ListView fx:id="listView" GridPane.columnIndex="0" GridPane.rowIndex="0">
<cellFactory>
<TaskCellFactory />
</cellFactory>
</ListView>
</GridPane>
在第二个版本中,intellij idea用
标记了错误的行,但这显然是xml解析器中的一个错误。您没有回答自己的问题吗?你需要一个细胞工厂来做这件事。这是一个定制的细胞工厂。没有任何东西可以阻止您在FXML中定义内容。它可以工作!我的问题是无法选择列表中的项目。知道为什么吗?@Green\u Sam选择是在updateItem()
函数中完成的(特别是在super.updateItem(item,empty);
)。如果它不能正常工作,您可以使用isSelected()
自己完成,并将单元格的背景更改为
public class TaskCellFactory implements Callback<ListView<Task>, ListCell<Task>> {
@Override
public ListCell<Task> call(ListView<Task> param) {
return new TaskCell();
}
}
public class Controller {
@FXML
private ListView<Task> listView;
@FXML
private void initialize() {
listView.setCellFactory(new TaskCellFactory());
}
}
<GridPane fx:controller="sample.Controller" xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
<ListView fx:id="listView" GridPane.columnIndex="0" GridPane.rowIndex="0">
<cellFactory>
<TaskCellFactory />
</cellFactory>
</ListView>
</GridPane>