无法在JavaFX TableView单元格值上显示工具提示 [英] Unable to show the Tool Tip on the JavaFX TableView cell value
问题描述
在我的 JavaFX TableView 我有一个 TableColumn 我已将Cell Factory设置为呈现 ProgressBar 以及其他 TableColumn s我将Cell Factory设置为显示工具提示。如下图所示。第二列显示进度条，其他3列呈现以显示工具提示，其中包含要显示的简单字符串值。
In my JavaFX TableView I have one TableColumn on which I have set Cell Factory to render ProgressBar and for other TableColumns I have set Cell Factory to show ToolTip. Like the image below. Second Column is showing Progress Bar and other 3 Columns are render to show Tool tip, that has simple string values to show.
我遇到的问题是 TableView 没有显示/显示表中的更新值，即UI未验证/刷新/绘画 TableView 元素。如果我点击 ColumnHeader 对任何列进行排序，那么我只能看到 TableView 更新。手动排序表列以刷新表内容没有意义，所以我搜索并找到解决方案来显示/隐藏表列以更新表视图。
I was getting issue in which the TableView was not displaying/showing updated values in the table i.e UI is not validating/refreshing/painting the TableView elements. If I clicked on ColumnHeader to sort any column then only I can see the TableView updating. Manually sort the table column to refresh the table content is not making sense so I have searched and found solution to show/hide the Table Columns for updating the Table View.
为了解决这个问题，我在下面编写了一个代码来解决 TableView 更新/刷新问题，但由于这个原因现在代码 ToolTip 未显示。
To resolved the issue I have written a code below to solve the TableView Updating/Refreshing issue but due to this code now ToolTip are not getting visible.
每个特定时间间隔后更新表格视图的代码
class TableProgressBarUpdator implements Runnable {
TableView table;
public TableProgressBarUpdator(TableView fxtable) {
table = fxtable;
}
public void start() {
new Thread(this).start();
}
public void run() {
while (keepUpdating) {
try {
updateProgressbar();
Thread.sleep(1000);
} catch (Exception e) {
LogHandler.doErrorLogging("Error while updating tables cell", e);
}
}
LogHandler.doDebugLogging("Table process repainting is completed.");
}
private void updateProgressbar() throws Exception {
Platform.runLater(new Runnable() {
@Override
public void run() {
((TableColumn) table.getColumns().get(0)).setVisible(false);
((TableColumn) table.getColumns().get(0)).setVisible(true);
}
});
}
}
开始更新表格视图
public void startUpdatingTableProgress() {
keepUpdating = true;
TableProgressBarUpdator tpu = new TableProgressBarUpdator(table);
tpu.start();
}
停止更新表格视图
public void stopUpdatingTableProgress() {
keepUpdating = false;
}
添加更多显示渲染类的代码以显示进度条和显示工具提示。
显示进度条表视图的代码。
public static class ProgressBarTableCell<S, T> extends TableCell<S, T> {
private final ProgressBar progressBar;
private ObservableValue<T> ov;
public ProgressBarTableCell() {
this.progressBar = new ProgressBar();
progressBar.setPrefHeight(23);
setAlignment(Pos.CENTER);
}
@Override
public void updateItem(T item, boolean empty) {
super.updateItem(item, empty);
if (item == null) {
setGraphic(null);
setText(null);
} else {
if (item.toString().equalsIgnoreCase("Processing")) {
Platform.runLater(new Runnable() {
@Override
public void run() {
if (getGraphic() == null) {
setGraphic(progressBar);
progressBar.setProgress(-1);
} else {
ProgressBar objpProgressBar = (ProgressBar) getGraphic();
objpProgressBar.setProgress(-1);
}
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
}
});
} else {
Platform.runLater(new Runnable() {
@Override
public void run() {
if (getGraphic() == null) {
setGraphic(progressBar);
progressBar.setProgress(0);
} else {
ProgressBar objpProgressBar = (ProgressBar) getGraphic();
objpProgressBar.setProgress(0);
}
setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
}
});
}
}
}
}
显示工具提示的代码
public class ToolTip extends TableCell {
@Override
protected void updateItem(Object object, boolean selected) {
if (object == null) {
setGraphic(null);
setText(null);
}else{
setText(object.toString());
setTooltip(new Tooltip(object.toString()));
}
}
}
问题 -
如果我从TableProgressBarUpdator类中注释掉这两行，那么我可以看到第1，第3和第4中每个单元格值的工具提示列，但现在表视图内容没有更新/刷新，当我联合评论这些行时，我无法看到工具提示。
((TableColumn) table.getColumns().get(0)).setVisible(false);
((TableColumn) table.getColumns().get(0)).setVisible(true);
总之，由于这两行，我的工具提示渲染不起作用，如果我删除这两行然后表视图内容不刷新/更新。
In all due to these two lines my Tool Tip Render is not working and If I remove these two lines then Table View Content are not Refreshing/Updating.
推荐答案
您无需手动更新 TableView 。您的类中可能存在与 TableView的列关联的问题。
You don't need to update TableView manually. may be there are problem in your class associated with that TableView's column.
您必须按以下方式创建课程：
You have to create class as given below :
public static class Test{
private StringProperty name;
private Test() {
name = new SimpleStringProperty();
}
public Test(String name) {
this.name = new SimpleStringProperty(name);
}
public void setName(String name) {
this.name.set(name);
}
public String getName() {
return name.get();
}
public StringProperty nameProperty() {
return name;
}
}
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