I am not professional in javaFX. I want to see the recent changes of a slider in the textField. but it doesn't work. I desperately need help.
slider1.valueProperty().addListener(new ChangeListener<Number>() {
#Override
public void changed(ObservableValue<? extends Number> arg0, Number oldValue, Number newValue)
{
textField.setText(newValue.doubleValue().toString());
}
});
newValue.doubleValue() returns double (which is a primitive type) not Double (class). therefore newValue.doubleValue().toString() doesn't exist.
Change
textField.setText(newValue.doubleValue().toString());
to
textField.setText(newValue.toString());
As an alternative, you can use binding instead of ChangeListener:
textField.textProperty().bind(slider.valueProperty().asString("%.2f"));
textfield.setText(String.valueOf(newValue));
Related
I created the following class as an extension of gwtbootstrap3 Tooltip. There are at least 2 reasons why I want to derive the gwtbootstrap3 Tooltip class:
1.) Add a onWindowClosing Handler when the tooltip is shown so I can hide() the tooltip when the user leaves the page (this is - as far as I understand - a feature which is also not supported in Bootstrap, is it?)
2.) I want to prevent Tooltips from being shown when the page is displayed on iPads or iPhones as they behave strange when tooltips are involved (first tip shows the tooltip , the second tip executes the button, which is not exactly what the user expects)
Please note that the class given below is still not finished ... but already at this stage I get an exception when adding a handler.
Please also note that it throws an exception no matter what type of Handler (ShowHandler, ShownHandler, etc.) I add.
Any help greatly appreciated.
package com.mypackage.client.widgets.featureWidgets;
import org.gwtbootstrap3.client.shared.event.ShowEvent;
import org.gwtbootstrap3.client.shared.event.ShowHandler;
import org.gwtbootstrap3.client.ui.constants.Trigger;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.Window.ClosingEvent;
public class Tooltip extends org.gwtbootstrap3.client.ui.Tooltip {
private boolean isMobile;
private HandlerRegistration windowClosingHandlerRegistration;
private final Tooltip tooltip;
public Tooltip() {
super();
tooltip = this;
this.addShowHandler(new ShowHandler() {
#Override
public void onShow(final ShowEvent showEvent) {
// TODO Auto-generated method stub
if (windowClosingHandlerRegistration == null) {
windowClosingHandlerRegistration = Window.addWindowClosingHandler(new Window.ClosingHandler() {
#Override
public void onWindowClosing(final ClosingEvent arg0) {
tooltip.hide();
}
});
}
}
});
}
}
When I create a instance of this tooltip using the following:
[...]
<b:ButtonToolBar ui:field="itemButtonToolBar" addStyleNames="hiddenPrint">
<b:ButtonGroup>
<a:Tooltip title="{msgs.buttomTitleAddItem}" container="body">
<b:Button ui:field="addItemButton" icon="PLUS"/>
</a:Tooltip>
[...]
I get the following exception when trying to add the Handler, why?
SEVERE: (TypeError) : Cannot read property 'addHandler_11_g$' of undefinedcom.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot read property 'addHandler_11_g$' of undefined
at Unknown.addShowHandler_2_g$(meetingApp-0.js#26:57195)
at Unknown.Tooltip_6_g$(meetingApp-0.js#8:57685)
at Unknown.build_f_Tooltip2_0_g$(meetingApp-0.js#55:31606)
at Unknown.get_f_Tooltip2_0_g$(meetingApp-0.js#15:31831)
at Unknown.build_f_ButtonGroup1_0_g$(meetingApp-0.js#38:31524)
at Unknown.get_f_ButtonGroup1_0_g$(meetingApp-0.js#15:31791)
at Unknown.build_itemButtonToolBar_0_g$(meetingApp-0.js#41:31696)
at Unknown.get_itemButtonToolBar_0_g$(meetingApp-0.js#15:31876)
at Unknown.createAndBindUi_58_g$(meetingApp-0.js#91:31437)
at Unknown.createAndBindUi_59_g$(meetingApp-0.js#15:31441)
at Unknown.ItemButtonGroup_2_g$(meetingApp-0.js#56:30733)
at Unknown.$init_589_g$(meetingApp-0.js#31:37722)
at Unknown.SummaryWidget_1_g$(meetingApp-0.js#8:37686)
at Unknown.loadSummaryWidget_0_g$(meetingApp-0.js#26:4991)
at Unknown.setSummary_1_g$(meetingApp-0.js#10:5028)
at Unknown.onSuccess_8_g$(meetingApp-0.js#21:3312)
at Unknown.onSuccess_9_g$(meetingApp-0.js#8:3317)
at Unknown.onResponseReceived_0_g$(meetingApp-0.js#26:156917)
at Unknown.fireOnResponseReceived_0_g$(meetingApp-0.js#17:129224)
at Unknown.onReadyStateChange_0_g$(meetingApp-0.js#28:129532)
at Unknown.<anonymous>(meetingApp-0.js#18:172082)
at Unknown.apply_0_g$(meetingApp-0.js#28:104636)
at Unknown.entry0_0_g$(meetingApp-0.js#16:104692)
at Unknown.<anonymous>(meetingApp-0.js#14:104672)
Disclaimer: I use gwtbootstrap3 v0.9.2 and I believe it's the same version as you use as I got the same error for your code.
A Tooltip needs a Widget to operate on (in your case the Button is a Tooltip's widget). Tooltip uses it's widget to do all events handling - see source code for addShowHandler for example.
Now you need to understand how the whole structure is built:
first the Tooltip is created (wit no widget set)
then the Button is created
Tooltip's setWidget method is called to set the button as a widget
So when you use addShowHandler method in your constructor, you actually call widget.addHandler while widget is null.
You can check it by Window.alert(tooltip.getWidget() == null ? "null" : tooltip.getWidget().toString());
There are few ways to make it work (the later the better):
wait for DOM structure to be built by scheduling a deferred command (if you are sure that the widget will be eventually set):
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
#Override
public void execute() {
// set up events handling
}
});
override setWidget method (note thet there are two methods: setWidget(Widget w) and setWidget(IsWidget w)):
#Override
public void setWidget(Widget w) {
super.setWidget(w);
// set up events handling
}
you don't need to addWindowClosingHandler in the showEvent handler, you can do it directly in the constructor:
public class Tooltip extends org.gwtbootstrap3.client.ui.Tooltip {
private boolean isMobile;
private final Tooltip tooltip;
public Tooltip() {
super();
tooltip = this;
Window.addWindowClosingHandler(new Window.ClosingHandler() {
#Override
public void onWindowClosing(final ClosingEvent arg0) {
tooltip.hide();
}
});
}
}
I'm fighting with a javafx textfield and i don't find how to call getText
everytime the text is changed. i'm doing a search box, so i want whenever the user type a character in the textfield i will be able to put it in a string then search for the item in a treeItem .
I tried this code but it doesn't work:
m_SearchTextField.textProperty().addListener(new ChangeListener<String>() {
#Override
public void changed(ObservableValue<? extends String> observable,
String oldValue, String newValue) {
String value = m_SearchTextField.getText();
}
});
however I find an answer in google that says we could use this
InputMethodListener
public void caretPositionChanged(InputMethodEvent ev){}
public void inputMethodTextChanged(InputMethodEvent ev){}
but i don't know how to use it really .. :(
or this : scene builder : on input method text changed
anyone knows how to use this functions ? I'll be grateful. thank you
I have write a simple javafx8 application, with a LineChart and a Button.
and i want to change visible property of yaxis and horizontalgridlines, when user clicks on the button, it's what i have inside the controller class:
public class Controller {
#FXML
LineChart chart;
#FXML
private void butClick(ActionEvent event) throws Exception {
chart.getYAxis().setVisible(false);
chart.setHorizontalGridLinesVisible(false);
}
}
the problem is on first click, only HorizontalGridLines disappear, and on second click, yaxis disappears.
why?
thanks
The problem is that setHorizontalGridLinesVisible invokes internally requestAxisLayout on the y axis. This seems to make the y axis visible again. Your problem can be reduced to invoking
lineChart.getYAxis().setVisible(false);
lineChart.getYAxis().requestAxisLayout();
The y axis won't get hidden. A workaround for your problem could be to use
lineChart.getYAxis().setOpacity(0);
instead of setVisible();
i've found a solution:
1- listen to horizontalgridlinevisible property of chart, and requestLayout() on change.
2- layout property of chart, and check if newvalue is false (layout already done) then set YAxis visibility->
chart.needsLayoutProperty().addListener(new ChangeListener<Boolean>() {
#Override
public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
if (chart.getYAxis().isVisible()!=chart.isHorizontalGridLinesVisible())
{
if (!newValue)
{
chart.getYAxis().setVisible(chart.isHorizontalGridLinesVisible());
}
}
}
});
chart.horizontalGridLinesVisibleProperty().addListener(new ChangeListener<Boolean>() {
#Override
public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
chart.requestLayout();
}
});
I know my question is considered initially to refer to the "very novice" level, but I have spent quite o lot of time on searching for the answer. I have used in a gwt application a DataGrid and I have attached a diversity of specific Cell widgets (i.e. TextCell, ButtonCell). My concern is how I can add and handle styling to the button of a ButtonCell through custom css. The code which implements the column of ButtonCells looks like as follows:
Column<FilterInfo, String> delButtonColumn = new Column<FilterInfo, String>(new ButtonCell()) {
#Override
public String getValue(FilterInfo object) {
return "X";
}
};
So, how can I add styling to the button (not to the entire Cell)? I suspect that I should also override the render function, however I cannot figure out how the styling is applied
#Override
public void render(Context context, FilterInfo object, SafeHtmlBuilder sb) {
super.render(context, object, sb);
???
}
You can use the setCellStyleNames() method in Column to apply a style that will be applied to every cell of the column. You have to use GWT 2.4 for this to work. It will probably be something like that. Please note that the code was written outside of any IDE, so it may contain errors.
Column<FilterInfo, String> delButtonColumn = new Column<FilterInfo, String>(new ButtonCell()) {
#Override
public String getValue(FilterInfo object) {
return "X";
}
};
delButtonColumn.setCelLStyleNames("yourStyleName");
And the css :
.yourStyleName.gwt-Button{
//your styling here
}
I need to implement drag and drop for cells in a CellTable. Following the example from the MobileWebApp I implemented a custom draggable cell:
public class DraggableCell extends AbstractCell<ProductProxy>{
interface Templates extends SafeHtmlTemplates {
#SafeHtmlTemplates.Template("<div draggable=\"true\">{0}</div>")
SafeHtml simpleTextTemplate(String text);
}
protected Templates templates = GWT.create(Templates.class);
public DraggableCell() {
super("dragstart");
}
#Override
public void render(Context context, ProductProxy value, SafeHtmlBuilder sb){
sb.append(templates.simpleTextTemplate(value.getName()));
}
#Override
public void onBrowserEvent(Context context, Element parent,
ProductProxy value, NativeEvent event,
ValueUpdater<ProductProxy> valueUpdater) {
final Integer cursorOffsetX = 0;
final Integer cursorOffsetY = 0;
if ("dragstart".equals(event.getType())) {
// Save the ID of the entity
DataTransfer dataTransfer = event.getDataTransfer();
dataTransfer.setData("text", value.getId());
SafeHtmlBuilder sb = new SafeHtmlBuilder();
sb.appendEscaped(value.getSn());
Element element = DOM.createDiv();
element.setInnerHTML(sb.toSafeHtml().asString());
// Set the helper image.
dataTransfer.setDragImage(element, cursorOffsetX, cursorOffsetY);
}
}
I use a new element for the drag image (in the MobileWebApp they just use the parent element), but unfortunately no image is displayed during the drag. I thought that maybe the new element needs to be attached to the DOM first, so I created a helperPanel and attached the element to it:
DOM.getElementById("dragHelperPanel").appendChild(element);
// Set the helper image.
dataTransfer.setDragImage(element, cursorOffsetX, cursorOffsetY);
This works fine in Firefox 6, but no luck in Chrome (using the latest stable version), so maybe this isn't the right way to do it. Any ideas? Thanks!
You can try the GWT Drag & Drop API. I have used it and its a good one even in mobile devices.
http://code.google.com/p/gwt-dnd/
Try the Demo here,
http://allen-sauer.com/com.allen_sauer.gwt.dnd.demo.DragDropDemo/DragDropDemo.html
Its quite simple to implement and don't have any issues so far for me