I have an issue similar to this post: https://forum.qt.io/topic/88519/editable-combobox-not-saving-edited-text/2
Where after I make a selection in the dropdown, if I scroll out of view and then back into view, the selection reverts back to the previous selection. I have these combo boxes in a scrollable TableView which apparently reloads elements every time they come back into view. Also, my ComboBox is not editable but I just want to be able to save the new selection I make.
I know I need to handle onAccepted, but I am not sure how to save the new value I select into the current selection that gets displayed if I leave the view then come back to it. I have 2 methods like this:
onDisplayTextChanged: {
console.log("currentText in onDisplayTextChanged: " + currentText)
onAccepted()
}
onAccepted: {
console.log("currentText in onAccepted: " + currentText)
}
I use onDisplayTextChanged to receive the new value selected that I can pass to a Python 3 script in the future, before calling onAccepted because onAccepted does not trigger for some reason after I click on a new selection. This is definitely not preferable for me though.
Related
The case:
I have Activities as datamodel.
I have set Activities to have many-to-many relationship with themselves to represent a Parent / Child relationship.
I have set up an accordion widget. Each row of the accordion contain basic data about the Activity record + some buttons.
I have set one of the button's onClick functions to open a popup, which allows me to edit the Activity detail in a form.
When I click a different record from the same accordion, the form from the popup reflects the data in the selected record.
The problem:
I have nested accordions which represent the "Child" Activities of the Parent Activity.
I have also added a similar button, which opens a popup. I can open the popup, which targets the child records, but cannot make it open the specific record, from which I pressed the button.
So the popup open by default on the first child.
Please help - how can I make the popup change naturally to reflect the datasource / selected record of even nested datasources?
What I tried:
In order to try and make to popup work I have tried to set the datasource based on the relationship:
Activities: Sub_Activities(relation)
This works to the extent of showing the related items, but popup content does not dynamically change on clicking a different child record or clicking the button from a different child record.
In both cases what is shown is the first child record.
What I understand is that you have a set up in which you click a button and a popup shows. The popup should let you view/edit the record referenced in the row where the button is. If that is the case, then probably you already have almost everything setup for the next thing to work. First, add a string custom property to the popup and name it selectedKey. Then, on the onClick event of the button that opens the popup, add something like this:
var key = widget.datasource.item._key;
app.popups.MYPOPUP.properties.selectedKey = key;
app.popups.MYPOPUP.visible = true;
Now, go to the popup content and add the following on the onAttach event handler:
var key = widget.root.properties.selectedKey;
widget.datasource.selectKey(key);
This is the general idea of how to make it work; However, in order for it to work, your datsources in the widgets should be properly set up. Good luck!
I start with the question and then describe the problem more in detail:
Question:
Is there a way to receive events from the listview of a JavaFx ComboBox directly (ComboBox consists of a listview and a textfield as far as I understand)? I would like to find out which element of the list has been clicked by mouse or which element was selected when the user pressed enter on the keyboard (after navigating with Up/Down Arrows in the list). I therefore need to receive the mouse click event or the keypress event on the listview, but all I can get so far are events on the combobox itself which turned out to be only changes in the textfield of the combobox.
Detailed problem description:
I have a JavaFx Application with a combobox where the idea is that the value is directly added to another list when the user clicks on an entry in the combobox list (when the popup of the combobox is open). Additionally, when the user navigates in the combobox list with the arrow keys on the keyboard and he presses enter, the currently selected value should be taken and added to the other list. However so far I have not found out how I can implement this feature with the standard JavaFx combobox.
Tried:
The first solution I tried was to add a change listener on the combobox's valueProperty (this is the value that is displayed in the textfield when the popup is closed). So when the user clicks on a listentry, the popup closes and the clicked entry is put into the value field, changes the value and therefore fires my change listener. This worked well with the mouse, but keyboard navigation did not work correctly because everytime the user navigates down or up on the list, the value field of the combobox is updated with the currently selected listentry and therefore fires my changelistener every time (which in turn adds the value to my other list, while it should only be added on enter keypress).
The next solution was to not add a listener to the valueProperty, but to the showingProperty. Everytime the combobox popup closes, the current value of the value field is taken and added to the other list. This works again well with the mouse, but still has issues with keyboard navigation. While it now correctly handles up/down navigation in the list and enter keypresses, the problem is now when you try to cancel the selection. When you press escape, the value is taken as well and added to the other list like you would have pressed enter. The problem with this approach is that I cannot find out with which keypress the popup has been closed.
So the next idea I had is to add an event filter to the combobox itself with the addEventFilter Method of the ComboBox with code similar to the following (also proposed here StackOverflow):
ComboBox comboBox = new ComboBox();
comboBox.addEventFilter(KeyEvent.KEY_PRESSED, (event) -> {
// do stuff
});
But the event filter never gets called when the combobox popup is open. It is only called when the popup is closed, which leads me to the assumption that the event is consumed by the listview. So the only solution to the problem seems to be to somehow capture the events from the listview itself. And that leads back to the question at the beginning of this post. Sorry for the long explanation.:-)
Came across this question while looking for something else. It touches on something I've worked on before so assuming I understand what you're trying to accomplish and also that this is still relevant here are a couple of ideas.
To keep the other list (list #2) in sync with the combo box for mouse clicks try:
A ChangeListener on the selectedItem property for the combo box's selectionModel. Clicking an item in the popup (drop-down) list view will change the selectedItem value and close the Window that 'owns' the list view, or
An event handler to the combo box for the event type ComboBoxBase.ON_HIDDEN which gets fired when the list view closes (or better said 'becomes hidden').
The ChangeListener may be problematic inasmuch as the selection models for the combo box and the list view are linked at a low level, so that changes to the selectedItem value for the list view which will be triggered when navigating with key strokes will necessarily be handled by the ChangeListener. Since you want to sync the combo box and list #2 only when the ENTER key is pressed, this will probably not work. But that still leaves the event handler idea to try.
As for ENTER key press, you need to get a handle for the list view itself, and then add whatever behavior (listeners/event handlers) as needed. You do this by getting the skin for the combo box, which should be an instance of ComboBoxListViewSkin, and then get the list view by invoking the getPopupContent() method for the skin; it returns the popup list view as a Node so you'll to recast the returned value but no big deal.
Hope this helps.
The idea of the below code is that ListView is created once the combobox is loaded in the JavaFX scene. Therefore, we add a listener on the combobox to check when it appears on the scene, and then through "lookup" method we get its listview and add a listener to it.
In the example, I have set a MouseEvent listener but you can easily adjust it for keys as well.
private EventHandler<MouseEvent> cboxMouseEventHandler;
private void initComboBox() {
ComboBox<String> comboBox = new ComboBox<String>();
comboBox.getItems().add("Item 1");
comboBox.getItems().add("Item 2");
comboBox.getItems().add("Item 3");
comboBox.sceneProperty().addListener((a,oldScene,newScene) -> {
if(newScene == null || cboxMouseEventHandler != null)
return;
ListView<?> listView = (ListView<?>) comboBox.lookup(".list-view");
if(listView != null) {
cboxMouseEventHandler = (e) -> {
Platform.runLater(()-> {
String selectedValue = (String) listView.getSelectionModel().getSelectedItem();
if(selectedValue.equals("Item 1"))
System.out.println("Item 1 clicked");
});
}; // cboxMouseEventHandler
listView.addEventFilter(MouseEvent.MOUSE_PRESSED, cboxMouseEventHandler);
} // if
});
} // initComboBox
I am using RowEditor plugin for my grid. Grid record has three buttons: choose,update,cancel. When I click on choose it will display another grid and user has to click on one record, then some values of that record have to display on the previous grid. How to do this ?
I am using extjs 3.0
Thanks in advance!
When you click on choose - show a modal window popup with grid. When you open that popup pass a callback into constructor of the popup. Then force user to select only one record in grid (using rowselectmodel). On itemclick even of the child grid - call your callback and pass selected data in the parent grid. Update parent's grid record with this data.
Hope I was clear.
To figure out which row the user selected, use the Ext.grid.GridPanel's SelectionModel. The default model is Ext.grid.RowSelectionModel (use selModel config setting to change the default). To grab the selected row, call myGridPanel.getSelectionModel().getSelected(). That will return an Ext.data.Record. Dig into that data to populate the original grid/store.
Thanks for your reply. I have done the required things.
How I have done is, just passed the editor to my function and using selection model, I got the values and have placed them into the editor.
val1 = selectedArray[0].get('val1');
var cm = grid.colModel, fields = editor.items.items, f, val;
f = fields[1];
f.setValue(val1);
editor.values[f.id] = val;
This makes my life easier.
But, I have another problem, after placing into the editor. I have to do validation in the afteredit event, if user clicks the update button. In the afteredit event,
afteredit: function(object, changes, record, rowIndex)
{
// I have to do validation on the changes; but its an object. How will I do it
???
}
Here's an image of what my problem is:
I am using a combo-box as a Datagrid ItemEditor (Not just Renderer, my Renderer is a Label, double clicking on a cell makes the combo-box visible, as is the case with all item editors)
Now, selecting one of the entries in the combo-box is no problem. But my problem is only when i select the "Fruit" , which in turn pops open another layer called "Select Fruit" dialog
Questions:
How do i keep item editor, while the focus is on the layer; right now as soon as i click on the fruit , my handler popsup the "Select Fruit" dialog and the focus is on the layer. Once the focus goes out of the editor, the ItemEditor goes away and ItemRenderer label comes back.
I want to keep the ItemEditor alive! where do I hook up interms of events like begin/end ItemEdit etc?
You can keep your itemEditor alive by listening for DataGridEvent.ITEM_EDIT_END. Then you have a lot more control to do what you want. Some FYI from my blog:
DataGridEvent.ITEM_EDIT_END
- Dispatched when focus is removed from the cell
- List-based control’s default event listener will
1) use the .editorDataFrield property to deterine the property of the item editor to store the edited data; In a default TextInput control’s item editor, the “text” property would contain the new data.
2) Invoke destoryItemEditor() depending on the reason of the event
You can interrupt the default List-based control’s default event listener by using event.preventDefault() to
a) Modify the data returned from the item editor
b) Examine/Validate the data entered into the item editor; If the data is incorrect, you can halt Flex passing the data back from the item editor into the list-based control
http://knowledge.lapasa.net/?p=153
Try losing focus of your ItemEditor. Goto Combo Box Change Listener
protected function comboBox_changeHandler(event:ListEvent):void
{
// set focus out event on datagrid. Its like clicking outside the datagrid
event.target.parent.parent.parent.dispatchEvent(new FocusEvent(FocusEvent.FOCUS_OUT);
}
I am facing a strange problem.
I have created a normal ext-gwt grid with two columns. One column displays a number and the other renders a ToggleButton. As soon as the ToggleButton gets pressed a small window appears with: 1- a textfield (to enter a number), 2- an ok button.
When the ok button is pressed the column containing the number should change it's value to the value given in the small window's textfield. This is the final picture I want to have. Easy! right?
The problem comes now. This is what is executed when the ok button is pressed in order to change the value in the column:
Integer value = new Integer(10);
Record record = store.getRecord(bean);
record.set("employeeNumber", value);
Although the value is actually changed using this code, it makes something weird. The ToggleButton remains in the "un-pressed" state whenever this code is executed. If I remove the last line, the ToggleButton functions normally again (gets pressed).
Any idea how to solve the problem of the ToggleButton?
Thank you
So you want the toggle button to change state after setting the value, right?
How do you get the toggle button into the grid?
I assume by using a custom widget renderer? In this case the render(..) method will be called more than once, returning a fresh and un-toggled button each time which will be displayed...
Maybe you could post some more code...?