According to document, I can make custom drop effect by overriding
Widget.dropEffect_(boolean)
However, I cannot make a widget display different drop effect according to dragged widget, because there is no reference of the dragged widget available.
My question is :
How do I make a drop effect that can changes according to dragged widget ?
You can override getDrop_ function to log the current dragged widget,
e.g.,
zk.afterLoad("zul", function () {
var _wgt = {};
zk.override(zk.Widget.prototype, _wgt, {
getDrop_: function (dragged) {
zk.Widget.currentDraggedInstance = dragged;
return _wgt.getDrop_.apply(this, arguments);
}
});
});
see the sample at zkfiddle for more information
custom drop effect
Related
I am using view zone with content widget combination to show custom widgets below the code in the editor. As I can see, the visibility style is forcefully set to hidden if the bounds of the widget are not fully visible in the editor. Is there a way to disable this behavior? Maybe the view zone with content widget combination is not the correct approach at all... If that is the case, could someone please advise? I got the idea from code lens.
I have managed to work around it with a MutationObserver. Something like this did the trick for me:
const observer = new MutationObserver((mutations: MutationRecord[], observer: MutationObserver) => {
mutations.forEach((mutation) => {
if (mutation.attributeName && mutation.attributeName === 'style') {
if (contentWidget.style.visibility === 'hidden') {
contentWidget.style.visibility = 'inherit';
}
}
})
});
observer.observe(contentWidget, {
attributes: true
});
I have a listView and setting multiChoiceModeListener on it. It works fine. Now to play an audio item inside the listView I have written
ViewHolder.AuidoXmlLayoutItem.setOnClickListener({...playAudioCode...});
inside the getView of listView adapter class.
because of this now the multiChoiceModeSelection dosent not show selection of listItem when I longPress on AuidoXmlLayoutItem and hence does not show ContextualActionBar.
How can I keep the onClick of the audio item layout and still allow ContextualActionBar to appear on long click of audio item layout
Try to use OnItemClickListener rather than OnClickListener. Follow this way,
view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// playAudioCode
// change the checkbox state
ViewToChecked checkedTextView = ((ViewToChecked)view);
checkedTextView.setChecked(!checkedTextView.isChecked());
}
});
You might get a concept.
I'm using UploadItem, RadioGroupItem and some other widgets. RadioButton is having onChangeHandler which will decide what all other components need to be displayed. I've uploaded some file using UploadItem. Then I changed the radio button selection. On changing the radio button, required widgets are getting displayed properly but whatever file I'd selected using UploadItem is going away. Fresh UploadItem widget is getting displayed. In other words page is getting refreshed.
My requirement is whenever I change radio button option, required widget should displayed along with that whatever file I had selected using UploadItem should remain same.
My Code is something like this:
UploadItem upload = new UploadItem();
RadioGroupItem radioGroup = new RadioGroupItem();
HashMap map = new HashMap();
map.put("option1","option1");
map.put("option2","option2");
radioGroup.setValueMap(map);
TextItem textbox = new TextItem();
radioGroup.addChangeHandler(new ChangeHandler(){
public void onChanged(ChangedEvent event) {
String radioValue =((String)event.getValue());
if(radioValue.equalsIgnoreCase("option2")){
textbox.show();
}else{
textbox.hide();
}
}
});
Add all created widgets to DynamicForm object using dynamicForm.setFields(all created widgets)
Changing the radio button should hide and show the textBox. But while doing that page is getting refreshed and whatever file we had selected using UploadItem is lost.
As per the documentation for hide() and show() of FormItem class, invocation of any of these methods, will cause the DynamicForm to be redrawn.
So it may cause the problem you're getting.
To overcome this issue, I would suggest you to put UploadItem in a separate DynamicForm.
fire an event on radio Selection change as
radioButton.addListener(Events.Change, new Listener<BaseEvent>() {
#Override
public void handleEvent(BaseEvent be) {
if(radioButton.getValue()){
//fire an event here for ur widget
}
}
});
I'm using GXT 3 to build a GridView that will display "incidents".
What I want to do is that when it renders it, I want some checkboxes to be checked, others to empty, according to the boolean in the database.
Below you have my code:
CheckBoxSelectionModel<IncidentDto> isIncidentCM = new CheckBoxSelectionModel<IncidentDto>(incidentProperties.incident());
allColumns.add(isIncidentCM.getColumn());
ColumnModel<IncidentDto> columnModel = new ColumnModel<IncidentDto>(allColumns);
final Grid<IncidentDto> grid = new Grid<IncidentDto>(store, columnModel);
grid.setSelectionModel(isIncidentCM);
add(grid);
And the IncidentProperties value provider:
IdentityValueProvider<IncidentDto> incident();
I'm not sure if you can bind the selection value to a boolean property, but you could add a listener to the Grid to update the checkboxes based on the boolean condition.
grid.addBeforeShowHandler(BeforeShowEvent event) {
#Override
public void onBeforeShow(BeforeShowEvent event) {
List<IncidentDto> itemsToSelect = new ArrayList<IncidentDto>();
for (IncidentDto incident : store.getAll()) {
if (incident.getBooleanProperty()) { //whatever your property is called
itemsToSelect.add(incident);
}
}
isIncidentCM.setSelection(itemsToSelect);
}
}
There may be other implications in using a BeforeShowEvent depending on how/when you populate your store, render the grid, etc. but assuming your store is fully loaded and the property available from your store objects I believe this should accomplish your goal.
I want to click on an image and therefore want to register (e.g.) a ClickHandler. The image I get from a ClientResource. This works so far to set the image into a table cell:
MyResources.INSTANCE.css().ensureInjected();
Image colorImage = new Image( MyResources.INSTANCE.colorImage() );
Element colorImageElement = colorImage.getElement();
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
System.out.println( event );
}
} );
TableElement table = Document.get().createTableElement();
TableRowElement headRow = table.insertRow(-1);
headRow.insertCell(-1).appendChild( colorImageElement );
RootPanel.get().getElement().appendChild( table );
How can I add a listener to the icon? I tried ClickHandler and to put the image on a PushButton and get the Element from this PushButton but all don't work.
But mind, if I add the widget (Image is a Widget) to a panel it works!
RootPanel.get().add( colorImage );
But I am not working with widgets here but with the Element. So the handler disappears and that's the point I don't get how to preserve this added handler information.
In the end I would like to build a table with different rows where I can click on the icon I get a popup menu and thereby change the colour of the row.
You should be able to just add a ClickHandler (or a MouseDownHandler if that fits your needs better).
Like this:
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
// Do something....
}
});
Don't unwrap your widget and append only the DOM elements. The Widget class allows your code to refer to both elements and events at the same time, and deals with possible memory leaks, as well as grouping your code in logical ways.
This might make sense for other frameworks, but in GWT you almost always want to work with the Widgets directly, adding them together, then appending them to the RootPanel.
If you really want to use a html table to build this up, look at the com.google.gwt.user.client.ui.HTMLTable subclasses, com.google.gwt.user.client.ui.Grid and com.google.gwt.user.client.ui.FlexTable. This probably should never be necessary, unless you are adding multiple items to the table - when trying to specify layouts, use actual layout classes.
did you tried to add image.sinkEvents( Event.ONCLICK | Event.MOUSEEVENTS )?
The image has to be inside a focus widget. I don't know why that is, but somewhere the events don't get propagated right and the DOM events don't fire.