I have to detect a click in a row in a table in Cuba framework but I don't find how.
I have a TreeTable. Then I have a button. If I have nothing selected in the table, I want the button disabled. If I click on a item I want the button to be enabled. If I click on a sub-item, I want the button to be disabled.
It is possible, in the action of the button to use a:
trackSelection = true
That will work, but enabled the button too if I click on a sub-item.
Then The idea is, when anything is clicked on the table, then do something. I have only to track the selection of any item, and then do a logic.
How can I track this selection?
I have tried anything like:
table.setClickListener("columnId", new CellClickListener() {
#Override
public void onClick(Entity item, String columnId) {
// TODO Auto-generated method stub
LOG.info("On cell click");
}
});
First, that don't work, even if I click on a cell. Then even if it will work, I have the complete row and not only a cell.
Somebody have an idea?
Thanks
Best regards
You can react on selection change in Table using CollectionDatasource.ItemChangeListener:
employeesDs.addItemChangeListener(event -> {
log.info("Datasource {} item has been changed from {} to {}",
event.getDs(), event.getPrevItem(), event.getItem());
});
See also: https://doc.cuba-platform.com/manual-6.9/datasource_listeners.html
Related
Is it possible to override the response to a touch interaction for a control in UWP? For example, for a DataGrid XAML control, the default behavior when a row is tapped is to select this row and deselect all other selected rows. Can this be changed to have the tapped row added to the selection as if the control key was pressed?
EDIT: My solution is for Surface Pro in tablet mode so the user would only interact with the app via touch. So I wanted him to be able to select multiple items using touch only. In the image I added, the default behavior if the user clicks on "Chicken Sandwich" is to deselect "Burger" and select "Chicken Sandwich" unless the CTRL key is held down. However using the CTRL key on Surface device without mouse and keyboard would mean that we will need to have the on-screen keyboard on display which would be a bit cumbersome. I would like instead to change the default behavior where if the user clicks on an unselected item it's added to the selection, and if he clicks on a selected item the item it gets removed from selection (in the example below, "Chicken Sandwich" will be added to the selection on first touch and removed from selection on second tap), so basically same functionality as holding the CTRL key down but without using it.
Based on the document, the DataGrid class provides the behavior that selecting multiple items while holding down the SHIFT or CTRL keys during selection. What you need to do is just to set the SelectionMode property as Extended.
Update:
Please check the following code as a sample:
List<object> selectedItems = new List<object>();
bool flag = false;
private void dataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if(flag==false)
{
var item = dataGrid.SelectedItem;
if (selectedItems.Contains(item))
{
selectedItems.Remove(item);
}
else
{
selectedItems.Add(item);
}
flag = true;
dataGrid.SelectedItems.Clear();
foreach(var cur in selectedItems)
{
flag = true;
dataGrid.SelectedItems.Add(cur);
}
}
else
{
flag = false;
}
}
I created a dialog class that inherited from JFace Dialog using Windows Builder. In that, I added some controls included a button and a JFace ListViewer. In widgetSelected() function of the button, I can get out the selected item in the ListViewer. But in `okPressed(), I cannot get this. I don't know why. Can you help me?
Thanks!
If you want to access UI elements in okPressed you must do so before calling super.okPressed() because that will close the dialog and dispose of the controls. So something like:
#Override
protected void okPressed()
{
IStructuredSelection sel = viewer.getStructuredSelection();
// TODO deal with selection
// Call super.okPressed() last
super.okPressed();
}
Alternatively save the selection when your widgetSelected is called.
I developed a VSTO 4 add-in for Excel. It works perfect, however, I have a button placed in the custom tab of its Ribbon control that is initially disabled.
After clicked other ribbon button in my custom tab, I need to enable the initially disabled button.
I tried with:
btnCancelar.Visible = true;
In the Click event of a button, but button is not shown. The strange thing is that when debugging, it still does not appear, but if a MessageBox is shown, the button get visible at last.
I don't understand this behaviour. How can I enable or disable a ribbon button dynamically by code?
I'm not sure what your language is used in your project, but I guess you can tranform it to your own language used. I'll show the example here in C#:
First you need to implement a so called Callback function in the RibbonXML definition:
<button id="buttonSomething" label="Content" size="large" getVisible="EnableControl"/>
then the next step is to implement the Callback function:
public bool EnableControl(IRibbonControl control)
{
return true; // visible ... false = invisible
}
VSTO will trigger the getVisible Callback and depending on the return value enable or disable the visible state (don't forget to remove any Visible property from the RibbonXML, otherwise the Callback is not triggered)
In case of the Ribbon Designer you need to make sure your Click signature is correct, the easies way to do that is by double clicking the button on the ribbon designer. This will create the Click method for you, for instance:
I created a Ribbon with the Ribbon designer and added two buttons. Double clicked the first button to get an empty method like below, and added the code.
private void button1_Click(object sender, RibbonControlEventArgs e)
{
// Toggle button visibility and make sure the button is enabled
// Visible (obviously) makes it visible, while Enabled is grayed if
// false. You don't need this it is Enabled by default, so just for
// demo purposes
button2.Visible = !button2.Visible;
button2.Enabled = button2.Visible;
// Force Ribbon Invalidate ...
this.RibbonUI.Invalidate();
// Long running proces
}
This worked perfectly for me, so if it doesn't work for you please provide more details of your coding.
I have created a workaround to this.
It was simple. Just started the long running process in different thread. That way, cancel button is shown when it should and then hidden after the process ends.
I used this code to launch the process in the Ribbon.cs code:
btnCancelar.Visible = true;
Action action = () => {
Formatter.GenerateNewSheet(Formatter.TargetType.ImpresionEtiquetas, frm.CustomerID, workbook, btnCancelar);
};
System.Threading.Tasks.Task.Factory.StartNew(action);
And inside the process method I have this code:
public static bool GenerateNewSheet(TargetType type, string customerID, Excel.Workbook workbook, Microsoft.Office.Tools.Ribbon.RibbonButton btnCancelar)
{
try
{
_cancelled = false;
InfoLog.ClearLog();
switch (type)
{
case TargetType.ImpresionEtiquetas:
return GenerateTagPrinting(customerID, workbook);
}
return false;
}
finally
{
btnCancelar.Visible = false;
}
}
The interesting thing here I have discovered is that Excel is thread safe, so it was not necessary to add a synchronization mechanism neither when adding rows in the new sheet nor when setting Visible property to false again.
Regards
Jaime
I am developing in Codename One.
I am having TextField in one form.
I want to open a dialog box on TextField's long press event
So how can I get long press event of TextField in codename one ?
I already tried by impementing ActionEvent and checked with
if(event.isLongEvent()){
}
but its not working..
Any idea ?
Thanks in advance.
Akash
This one works :
Button button = new Button("Test") {
#Override
public void longPointerPress(int x, int y) {
System.out.println("LONG PRESS");
}
};
Since text field uses native editing the long press event will be grabbed by the native editing functionality so for the text field it just won't work well.
You can derive most components and override longPress or add a long press listener to the form which will have a similar effect but its likely to cause an issue with the native input.
I try to implement a custom ContextMenu in a LongListSelector.
I'm not using the ContextMenu from Microsoft.Phone.Controls.Toolkit, it's basically the same as in the Rowi App:
(source: hiddenpineapple.com)
Approach 1
My list item toggles a VisualState on hold and an overlay is shown with controls in it.
The problem
I can't find a way to go back to the default state when the user clicks outside of the list item (as in the default ContextMenu).
Approach 2
I've implemented a custom template for the toolkit ContextMenu which looks exactly the same. I had to move its margin top to -itemHeight, as by default it is below the item.
The problem
The problem with this solution is, that it automatically closes itself when opening and I couldn't figure out how to avoid this.
Another problem was that it didn't work well with TiltEffect.IsTiltEnabled from the Toolkit (visual problems).
I need your help
Any suggestions on how to get this working?
Answer
Thanks to Cheese, now I know how to properly close the menu when the user clicks outside.
His suggestion was to get the coordinates of a Tap event on the current page, and check if it's inside the menu. When not, close the menu.
So I added a Tap listener to the page when the menu opens, and removed it when the menu closes. From the page listener I got the event coordinates and could check if it's inside the control which holds the menu (same size and position). I received the position of the control with Point leftUpperPoint = control.TransformToVisual(page).Transform(new Point(0, 0)) and the rightLowerPoint by adding the ActualWidth and ActualHeight.
But then I realized:
Why should I even calculate if the tap is inside the menu? I always want to close the menu when the user taps anywhere on the screen. If it's outside, yes. If it's on a menu button, yes.
Another modification I made was to listen for MouseLeftButtonDown instead of Tap as it also triggers when the user swipes.
So I removed this code and came up with the following:
private void ToggleMenu(object sender, System.Windows.Input.GestureEventArgs e)
{
PhoneApplicationFrame frame = ((PhoneApplicationFrame)Application.Current.RootVisual);
VisualState state = this.States.CurrentState;
if (state == null || state.Name == "DefaultState")
{
frame.MouseLeftButtonDown += MouseDownDelegate;
this.State = "MenuState";
}
else
{
frame.MouseLeftButtonDown -= MouseDownDelegate;
this.State = "DefaultState";
}
}
private void MouseDownDelegate(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
ToggleMenu(sender, null);
}
This works perfectly!
Thanks to Cheese for the hint.
Something like this by #denniscode http://dotnet.dzone.com/articles/rowi-show-tap-menu
Approach 1 problem
The best solution would be:
Get the menus coordinates, when user makes a tap - you check are tap coordinates on menu or not, if not - dissmiss - simple.
Approach 2 problem
I guess you had some button in a corner and when you tapped on it - nothing happened? And when you dissmissed the Tilt all worked. It seems that tilt works faster than a click, so, tilt changes the button coordinates, and device thiks you have missed/or dragged off
You can use what #ScottIsAFool suggested and maybe create another Dependency Property on your TapMenu control of type UIElement named CloseWhenTappedElement and automatically listen for Tap events inside your control once set. For example
<Grid x:Name="TapArea"/>
<TapMenu CloseWhenTappedElement="{Binding ElementName=TapArea"}/>