GWT event not working on an element added in runtime - events

I create a new CellTable.
Override the onBrowserEvent2 to handle mouse events.
Add a new element to the table.
Sadly the event listener is not working on the added element. It's only working on the initial elements.
table = new CellTable<Contact>() {
public void onBrowserEvent2(Event event) {
Element tr = Element.as(event.getEventTarget());
boolean gotIt = false;
while (!gotIt && tr != null) {
if (!tr.getTagName().equals("TR")) {
tr = tr.getParentElement();
continue;
}
gotIt = true;
}
if (tr == null)
return;
tr = Element.as(tr.getChild(1));
Element out = DOM.createDiv();
out.setInnerHTML("<a href='xxx'>Edit contact</a> | <a href='xxx'>Add visit plan</a> | <a href='xxx'>New visit</a>");
switch (DOM.eventGetType(event)) {
case Event.ONMOUSEOVER:
tr.appendChild(out);
break;
case Event.ONMOUSEOUT:
tr.getChild(1).removeFromParent();
break;
}
}
};

If you are fine with it you can have all your handlers declared separately.
You can always add Mouse Handlers directly like this:
//code depicting a MouseOverHandler. Use this for any type of GWT Event Handler
CellTable<String> cellTable = new CellTable<String>();
cellTable.addDomHandler(new MouseOverHandler() {
#Override
public void onMouseOver(MouseOverEvent event) {
// Your logic
}
}, MouseOverEvent.getType());
That should help

Related

Windows Form Multi-Select for Tree View

Is there a way to multi-select in a Windows Tree View? Similar to the image below
I know that .NET currently doesn't have a multiselect treeview. It is treated as a wrapper around the win32 native treeview control. I would like to avoid the Treeview's Checkbox property if possible. Any suggestions is greatly appreciated!
Im gonna assume you're trying to avoid check boxes. Here is an example:
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
treeView1.DrawMode = OwnerDrawText;
treeView1.DrawNode += treeView1_DrawNode;
treeView1.NodeMouseClick += treeView1_NodeMouseClick;
}
private void treeView1_DrawNode(object sender, DrawTreeNodeEventArgs e) {
// Show checked nodes with an underline
using (SolidBrush br = new SolidBrush(e.Node.TreeView.BackColor))
e.Graphics.FillRectangle(br, e.Node.Bounds);
Font nodeFont = e.Node.NodeFont;
if (nodeFont == null) nodeFont = e.Node.TreeView.Font;
if (e.Node.Checked) nodeFont = new Font(nodeFont, FontStyle.Underline);
using (SolidBrush br = new SolidBrush(e.Node.TreeView.ForeColor))
e.Graphics.DrawString(e.Node.Text, nodeFont, br, e.Bounds);
if (e.Node.Checked) nodeFont.Dispose();
}
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e) {
if (Control.ModifierKeys == Keys.Shift && e.Node.Parent != null) {
// Extend selection
bool check = false;
foreach (TreeNode node in e.Node.Parent.Nodes) {
if (node.Checked) check = true;
node.Checked = check;
if (node == e.Node) break;
}
}
else {
unselectNodes(treeView1.Nodes);
e.Node.Checked = true;
}
}
This question has been answered here but I'll briefly answer your question. While it is true that Native Treeview control does not allow multiple selection, you can derive a subclass from it and override its behaviors.
Example code:
checkNodes method:
private void checkNodes(TreeNode node, bool check)
{
foreach (TreeNode child in node.Nodes)
{
if (child.Checked == true)
{
MessageBox.Show(child.Text);
}
//MessageBox.Show(child.Text);
checkNodes(child, check);
}
}
Treeview method after check:
private void treeView1_AfterCheck(object sender, TreeViewEventArgs e)
{
if (e.Action != TreeViewAction.Unknown)
{
if (busy) return;
busy = true;
try
{
TreeNode _node = e.Node;
checkNodes(e.Node, e.Node.Checked);
if (e.Node.Checked)
{
MessageBox.Show(e.Node.Text);
}
}
finally
{
busy = false;
}
}
}
It is not trivial to do so, however it can be done.

How to implement TabLayout.IOnTabSelectedListener.OnTabUnselected with TabbedPage.ToolbarPlacement="Bottom" - Xamarin Forms?

I just recently used android:TabbedPage.ToolbarPlacement="Bottom". I used to have the following code:
void TabLayout.IOnTabSelectedListener.OnTabUnselected(TabLayout.Tab tab)
{
var playPage = Element.CurrentPage as NavigationPage;
if (!(playPage.RootPage is PhrasesFrame))
return;
var tabLayout = (TabLayout)ViewGroup.GetChildAt(1);
var playTab = tabLayout.GetTabAt(4);
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
Anyone knows how can I implement this with ToolbarPlacement="Bottom" ? I have implemented both BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener but can't find any reference for UnselectedTab if there is any.
Edit:
Previous custom renderer using the default tab position and implementing TabLayout:
namespace Japanese.Droid
{
public class MyTabbedPageRenderer: TabbedPageRenderer, TabLayout.IOnTabSelectedListener
{
ViewPager viewPager;
TabLayout tabLayout;
bool setup;
public MyTabbedPageRenderer(Context context): base(context){ }
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
// More codes here
}
void TabLayout.IOnTabSelectedListener.OnTabReselected(TabLayout.Tab tab)
{
UpdateTab(tab);
}
void TabLayout.IOnTabSelectedListener.OnTabSelected(TabLayout.Tab tab)
{
UpdateTab(tab);
}
void TabLayout.IOnTabSelectedListener.OnTabUnselected(TabLayout.Tab tab)
{
var playPage = Element.CurrentPage as NavigationPage;
if (!(playPage.RootPage is PhrasesFrame))
return;
var tabLayout = (TabLayout)ViewGroup.GetChildAt(1);
var playTab = tabLayout.GetTabAt(4);
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
void UpdateTab(TabLayout.Tab tab)
{
// To have the logic only on he tab on position 1
if (tab == null || tab.Position != 4)
{
return;
}
if (tab.Text == "Play")
{
tab.SetText("Pause");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
}
else
{
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
}
}
}
Current custom renderer using the ToolbarPlacement="Bottom":
namespace Japanese.Droid
{
public class BottomTabPageRenderer : TabbedPageRenderer, BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener
{
public BottomTabPageRenderer(Context context) : base(context) { }
protected override void OnElementChanged(ElementChangedEventArgs<TabbedPage> e)
{
base.OnElementChanged(e);
// More codes here
}
bool BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected(IMenuItem item)
{
base.OnNavigationItemSelected(item);
UpdateTab(item)
}
void BottomNavigationView.IOnNavigationItemReselectedListener.OnNavigationItemReselected(IMenuItem item)
{
UpdateTab(item);
}
void UpdateTab(IMenuItem item)
{
var playTabId = 4;
var title = item.TitleFormatted.ToString();
if (item == null || item.ItemId != playTabId)
{
return;
}
if (item.ItemId == playTabId)
{
if (title == "Play")
{
item.SetTitle("Pause");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
}
else
{
item.SetTitle("Play");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
}
}
}
}
So now my problem is I don't have any idea how will I implement the TabLayout.IOnTabSelectedListener.OnTabUnselected in the new custom renderer.
There is no official stuff for OnTabReselected event for TabbedPage's bottom navigation or
BottomNavigationView because It doesn't use TabLayout.Tab for a start. Many overridden methods of TabbedPageRenderer not being called like SetTabIcon. If you are using IOnTabSelectedListener interface(As your first part of code) you have three methods to use.
void OnTabReselected(Tab tab);
void OnTabSelected(Tab tab);
void OnTabUnselected(Tab tab);
But when it comes to BottomNavigationView interface you have only two methods
void OnNavigationItemReselected
bool OnNavigationItemSelected
So we don't have built in OnTabUnselected method. Here you need to write custom code to make unseleted event.
I have tried this code without using custom renderer using 4 tabs pages & the xaml of tabbed written in MailPage.xaml file. First declare List<string> in App.xaml.cs file to store Title of all tabs
public static List<string> Titles {get;set;}
Add tabs pages title in above list from MainPage.xaml.cs file's OnAppearing method
protected override void OnAppearing()
{
for (int i = 0; i < this.Children.Count; i++)
{
App.Titles.Add(this.Children[i].Title);
}
}
Now go to your MyTabbedPage class in which is available in shared project.
public class MyTabbedPage : Xamarin.Forms.TabbedPage
{
string selectedTab = string.Empty;
string unSelectedTab = string.Empty;
bool isValid;
public MyTabbedPage()
{
On<Xamarin.Forms.PlatformConfiguration.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
this.CurrentPageChanged += delegate
{
unSelectedTab = selectedTab;
selectedTab = CurrentPage.Title;
if (App.Titles != null)
isValid = true;
else
App.Titles = new List<string>();
if (isValid)
{
MoveTitles(selectedTab);
//Pass 0 index for tab selected & 1 for tab unselected
var unSelecteTabTitle = App.Titles[1];
//TabEvents(1); here you know which tab unseleted call any method
}
};
}
//This method is for to moving selected title on top of App.Titles list & unseleted tab title automatic shifts at index 1
void MoveTitles(string selected)
{
var holdTitles = App.Titles;
if (holdTitles.Count > 0)
{
int indexSel = holdTitles.FindIndex(x => x.StartsWith(selected));
holdTitles.RemoveAt(indexSel);
holdTitles.Insert(0, selected);
}
App.Titles = holdTitles;
}
}
Or you can make swith case like this
void TabEvents(int index)
{
switch (index)
{
case 0:
//Tab selected
break;
case 1:
//Tab unselected
break;
}
}
Few things I should mention that MainPage.xaml.cs file inheriting MyTabbedPage
public partial class MainPage : MyTabbedPage
Structure of MainPage.xaml file
<?xml version="1.0" encoding="utf-8" ?>
<local:MyTabbedPage
<TabbedPage.Children>
<NavigationPage Title="Browse">
</NavigationPage>
</TabbedPage.Children>
</local:MyTabbedPage>
Answer seems long but hope it help you.
As per G.Hakim's suggestion, I was able to do what I wanted to do by capturing the tab item I wanted to work on and do the necessary actions in BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected.
namespace Japanese.Droid
{
public class BottomTabPageRenderer : TabbedPageRenderer, BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener
{
// same as above
bool BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected(IMenuItem item)
{
base.OnNavigationItemSelected(item);
if(item.ItemId == 4 && item.TitleFormatted.ToString() == "Play")
{
item.SetTitle("Pause");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
playTab = item;
}
if(item.ItemId !=4 && playTab.TitleFormatted.ToString() == "Pause")
{
playTab.SetTitle("Play");
playTab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
return true;
}
// same as above
}
}

How to update tabbar badge-icon in Xamarin.Forms.iOS?

I can successfully work with the badge on my tabbar if i use it straight in my ViewWillAppear function but if i create a function where i try to control it then the badge does not appear.
This is the tabbedpaged renderer where I have to the function that changes the badge.
public override void ViewWillAppear(bool animated)
{
if (TabBar == null) return;
if (TabBar.Items == null) return;
var tabs = Element as TabbedPage;
if (tabs != null)
{
for (int i = 0; i < TabBar.Items.Length; i++)
{
UpdateItem(TabBar.Items[i], tabs.Children[i].Icon);
}
}
base.ViewWillAppear(animated);
}
private void UpdateItem(UITabBarItem item, string icon)
{
TabBar.UnselectedItemTintColor = UIColor.White;
}
public void UpdateBadge ()
{
var tabs = Element as TabbedPage;
if (tabs != null)
{
Device.BeginInvokeOnMainThread(() =>
{
var tab = TabBar.Items[3];
tab.BadgeValue = "New";
tab.BadgeColor = UIColor.Red;
});
}
}
Then I have another file where I handle a pushnotification and this is where I call the UpdateBadgefunction to both push a notification and also update the badge in the app.
void IPush.SendPush()
{
var notification = new UILocalNotification();
notification.SoundName = UILocalNotification.DefaultSoundName;
UIApplication.SharedApplication.PresentLocalNotificationNow(notification);
TabbedPage_Renderer tpr = new TabbedPage_Renderer();
tpr.UpdateBadge();
}
But as stated above this does not add the badge.
If I however add...
var tab = TabBar.Items[3];
tab.BadgeValue = "New";
tab.BadgeColor = UIColor.Red;
...inside the ViewWillAppear straight away it successfully shows an iconbadge when i start the app up but the idea is to control it so i can update the badge whenever i want.
We should not use the instance of the Renderer directly.
If you want to change the UI in the platform's renderer, we can try to define a BindableProperty in the forms. Then tell the renderer do some configuration when this property changed.
Firstly, define a BindableProperty in the page which you want to change its Badge like:
public static readonly BindableProperty BadgeTextProperty = BindableProperty.Create(nameof(BadgeText), typeof(string), typeof(MainPage), "0");
public string BadgeText {
set
{
SetValue(BadgeTextProperty, value);
}
get
{
return (string)GetValue(BadgeTextProperty);
}
}
Secondly, in the renderer, we can set the badge text when this property changed like:
for (int i = 0; i < TabBar.Items.Length; i++)
{
UpdateItem(TabBar.Items[i], tabs.Children[i].Icon);
//register the property changed event
tabs.Children[i].PropertyChanged += TabbarPageRenderer_PropertyChanged;
}
private void TabbarPageRenderer_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
var page = sender as Page;
if (page == null)
return;
if (e.PropertyName == "BadgeText")
{
if (CheckValidTabIndex(page, out int tabIndex))
{
switch(tabIndex)
{
case 0:
UpdateBadge(TabBar.Items[tabIndex], (page as MainPage).BadgeText);
break;
case 1:
//Second Page, you can expand this switch depending on your tabs children
UpdateBadge(TabBar.Items[tabIndex], (page as SecondPage).BadgeText);
break;
default:
break;
}
}
return;
}
}
public bool CheckValidTabIndex(Page page, out int tabIndex)
{
tabIndex = Tabbed.Children.IndexOf(page);
return tabIndex < TabBar.Items.Length;
}
private void UpdateItem(UITabBarItem item, string icon)
{
TabBar.UnselectedItemTintColor = UIColor.White;
...//set the tabItem
}
private void UpdateBadge(UITabBarItem item, string badgeText)
{
item.BadgeValue = text;
item.BadgeColor = UIColor.Red;
}
At last, set the BadgeText in the forms when you want to update the badge.

Handling ScrollEvent on TableView takes too much of the CPU Time

I have a TableView named tableVerre and I want to have every row of it checked for a criteria ( stock column value ) and execute some code on them as I scroll so I wrote this code but it makes the program consume a lot of CPU time, I'm not familiar with Lambda expressions so is there a simpler way to write this ? :
tableVerre.addEventFilter(ScrollEvent.ANY, new EventHandler<ScrollEvent>() {
#Override
public void handle(ScrollEvent scrollEvent) {
stock.setCellFactory(column -> {
return new TableCell<VerreFX, Number>() {
#Override
protected void updateItem(Number item, boolean empty) {
super.updateItem(item, empty);
TableRow<VerreFX> currentRow = getTableRow();
if (empty || item == null) {
setText("");
setGraphic(null);
currentRow.setStyle(tableVerre.getStyle());
} else {
setText(getItem().toString());
}
if (!isEmpty()) {
if ((int) item == 0 && st.getVerresBOX()) currentRow.setStyle("-fx-background-color:lightcoral");
}
}
};
});
}
});
The table view will reuse cells as the user scrolls, and will automatically call updateItem on the cells when they are reused for new items. So you should set the cell factory only once, and then just let the table view take care of doing the job it is designed to do. You can set the cell factory in the initialize() method if you are using FXML, or just wherever you create the table and columns otherwise.
Your cell implementation isn't quite correct: because a cell may be reused to display any two different items arbitrarily, you need to account for all possible conditions. In your implementation, if a cell shows an item for which item.intValue()==0 and is then reused to show an item for which item.intValue() != 0, then the style will not be updated correctly.
Also note that you should "convert" a Number to an int by calling intValue().
TableColumn<VerreFX, Number> stock ;
// ...
stock.setCellFactory(column -> new TableCell<VerreFX, Number>() {
#Override
protected void updateItem(Number item, boolean empty) {
super.updateItem(item, empty);
TableRow<VerreFX> currentRow = getTableRow();
if (empty || item == null) {
setText("");
setGraphic(null);
currentRow.setStyle(tableVerre.getStyle());
} else {
setText(getItem().toString());
}
if (!isEmpty()) {
if (item.intValue() == 0 && st.getVerresBOX()) {
currentRow.setStyle("-fx-background-color:lightcoral");
} else {
currentRow.setStyle(tableVerre.getStyle());
}
}
}
});
You should be able to remove the scroll event handler entirely.
Firstly beside over CPU time using you didn't cover all the scrolling situations because if the user scrolls using the key Down/Up or using the scroll bar the scroll event will not be fired. So you have to add two more EventFilter, the first will handle the Scrolling using the Scrollbar.
tableVerre.addEventFilter(MouseEvent.MOUSE_CLICKED,(
MouseEvent event)->
{
if ((event.getTarget() instanceof TableColumnHeader) | event.isDragDetect()) {
System.err.println("Mouse Draged : " + event.toString());
stock.setCellFactory((TableColumn<VerreFX, Number> column) -> {
return new TableCell<VerreFX, Number>() {
#Override
protected void updateItem(Number item, boolean empty) {
super.updateItem(item, empty);
TableRow<VerreFX> currentRow = getTableRow();
if (empty || item == null) {
setText("");
setGraphic(null);
currentRow.setStyle(tableVerre.getStyle());
} else {
setText(getItem().toString());
}
if (!isEmpty()) {
if ((int) item == 0 && st.getVerresBOX()) {
currentRow.setStyle("-fx-background-color:lightcoral");
}
}
}
};
});
}
});
And the second one will handle the scrolling using the keyboard Key DOWN/UP.
tableVerre.addEventFilter(KeyEvent.KEY_PRESSED,new EventHandler<KeyEvent>(){
#Override
public void handle(KeyEvent event) {
if (event.getCode() == KeyCode.DOWN | event.getCode() == KeyCode.UP) {
stock.setCellFactory(column -> {
return new TableCell<VerreFX, Number>() {
#Override
protected void updateItem(Number item, boolean empty) {
super.updateItem(item, empty);
TableRow<VerreFX> currentRow = getTableRow();
if (empty || item == null) {
setText("");
setGraphic(null);
currentRow.setStyle(tableVerre.getStyle());
} else {
setText(getItem().toString());
}
if (!isEmpty()) {
if ((int) item == 0 && st.getVerresBOX()) {
currentRow.setStyle("-fx-background-color:lightcoral");
}
}
}
};
});
}
System.err.println("Key Pressed : " + event.toString());
}
});

adding Double click event in CellTable cell - GWT

I am unable to figure out how could I add a double click event to the cell of the CellTable.
Is it possible with GWT CellTable or not?
Is there any workaround
thank you..
al
BTW, i saw this post but there is no reply...
http://www.devcomments.com/Adding-DoubleClicks-and-OnContextMenu-to-CellTable-at1066168.htm
I crafted something different that just fit my needs:
cellTable.addCellPreviewHandler(new Handler<TitoloProxy>() {
long lastClick=-1000;
#Override
public void onCellPreview(CellPreviewEvent<TitoloProxy> event) {
long clictAt = System.currentTimeMillis();
GWT.log("clickAt: "+(clictAt));
GWT.log("lastClick: "+(lastClick));
if(event.getNativeEvent().getType().contains("click")){
GWT.log(""+(clictAt-lastClick));
if(clictAt-lastClick < 300) { // dblclick on 2 clicks detected within 300 ms
Window.alert("I am a double click crafted event!");
}
lastClick = System.currentTimeMillis();
}
}
});
cellTable.addDomHandler(new DoubleClickHandler() {
#Override
public void onDoubleClick(DoubleClickEvent event) {
Window.alert("That's it!");
}
}, DoubleClickEvent.getType());
Integer row=0;// to hold row index
Integer column=0;// to hold column index
_Grid.addCellPreviewHandler(new CellPreviewEvent.Handler<Model>() {
// this is to handle row id
#Override
public void onCellPreview(final CellPreviewEvent<Model> event) {
if (BrowserEvents.CLICK.equalsIgnoreCase(event.getNativeEvent().getType())) {
row = event.getIndex();
column=event.getColumn();
}
}
});
// because Doubleclick handler doesn't give row index or column index we will use addCellPreviewHandler to return row index or column index.
_Grid.addDomHandler(new DoubleClickHandler() {
#Override
public void onDoubleClick(final DoubleClickEvent event) {
System.out.println(" You clicked row = " + row);
System.out.println(" You clicked column = " + column);
}
}, DoubleClickEvent.getType());
For cell lists, this code works ok:
cellList.addDomHandler(new DoubleClickHandler() {
#Override
public void onDoubleClick(DoubleClickEvent event) {
// do the stuff
}
}, DoubleClickEvent.getType());
I'm not sure about table cells
Because the CellPreview interface does not natively capture double click events you will need add event logic into the Overriden onCellPreview method. First you would think the best way would be to check the click time differences. However it is much more efficient and elegant to use a state machine and count clicks. This is more robust and allows you to deal with multiple event cases - Such as mouse hover, single, and double clicks. The code is pretty straightforward. So enjoy!
public class CellHoverHandler implements Handler<T> {
Timer singleClickTimer;
int clickCount = 0;
int clickDelay = 300;
#Override
public void onCellPreview(final CellPreviewEvent<T> event) {
if (Event.getTypeInt(event.getNativeEvent().getType()) == Event.ONMOUSEOVER) {
handleOnMouseOver(event);
} else if (Event.getTypeInt(event.getNativeEvent().getType()) == Event.ONCLICK) {
clickCount++;
if (clickCount == 1) {
singleClickTimer = new Timer() {
#Override
public void run() {
clickCount = 0;
handleOnClick(event);
}
};
singleClickTimer.schedule(clickDelay);
} else if (clickCount == 2) {
singleClickTimer.cancel();
clickCount = 0;
handleOnDblClick(event);
}
}
}
private void handleOnMouseOver(CellPreviewEvent<T> event) {
Element cell = event.getNativeEvent().getEventTarget().cast();
GWT.log("mouse over event");
}
private void handleOnClick(CellPreviewEvent<T> event) {
Element cell = event.getNativeEvent().getEventTarget().cast();
GWT.log("click event");
}
private void handleOnDblClick(CellPreviewEvent<T> event) {
Element cell = event.getNativeEvent().getEventTarget().cast();
GWT.log("double click event");
}
OPTIMIZATION: feel free to stick the count, timer, and delay as static class members or global members to reuse. Also check to see if the timer is null before making a new instance. I had omitted this for simplicity. Unlike a lot of other techniques this way still provides you with easy and direct access to the cell event. The technique with overloading the AbstractCell works well too, however sometimes you really don't have custom cells or want to make a custom cell to just handle events on the cell.
Leaving this here for future reference
private Set<GenericEventHandler<T>> dblClickHandlers = new HashSet<>(4);
dblClickHandlers simply maps interface implementations of my choice
table.addCellPreviewHandler(event -> {
if (BrowserEvents.DBLCLICK.equalsIgnoreCase(event.getNativeEvent().getType())) {
LOGGER.info("dblclick (native) " + event.getIndex() + " " + event.getColumn() + "; " + event.getValue());
dblClickHandlers.forEach(handler -> {
handler.onEvent(event.getValue());
});
}
});
table.sinkBitlessEvent(BrowserEvents.DBLCLICK);
The trick is to sink the 'dblclick' event.
If you wanted a text cell that allows you to support your own chosen list of events, you can use this:
public class EventfulTextCell extends AbstractSafeHtmlCell`<String`> {
private static final String[] NO_CONSUMED_EVENTS = null;
public EventfulTextCell() {
this(NO_CONSUMED_EVENTS);
}
public EventfulTextCell(String... consumedEvents) {
super(SimpleSafeHtmlRenderer.getInstance(), consumedEvents);
}
#Override
public void render(Context context, SafeHtml value, SafeHtmlBuilder sb) {
if (value != null) {
sb.append(value);
}
}
}
Then you instantiate it:
new EventfulTextCell("click", "dblclick")
Then override the onBrowserEvent() method to process your events.

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