I'm experimenting with the repetition widget to make things easier to create reports. But I ran into the following problem.
When I use a chart widget in the repetition widget with a on Row Click event, it seems not propagating it to the report. If I use the same widget outside the repetition widget the event is fired!
Is this a know issue or do I have to configure additional settings in the repetition widget to make this work?
Related
I have a Qt widget which has a layout and there are more widgets inside it. When I disable the widget the whole widget becomes little faded and no modifications are possible anymore. I want the features that comes with disabling a widget but I do not want it's appearance to change. Please let me know how this can be done.
Few ideas that comes to my mind:
Rather disabling widget, capture all the events on the widget and do nothing
Update style sheet for disabled state (not sure if possible)
1. Capture events
Use QObject::installEventFilter() and QObject::eventfilter().
Keep in mind the way Qt dispatch GUI events, in particular children get events first. So you need to install the event filter recursively on all widgets and watch for QEvent::ChildAdded.
2. Using stylesheets
This is a not a good solution. Stylesheets tend to break QStyle mechanisms which may lead to side effects.
3. Use a QPixmap
Hide all the child widgets, render them to a QPixmap and draw the pixmap in the paintEvent.
I have two widgets with buttons which I want to synchronize. If I press a button on the first widget I can fire the corresponding event of the second widget but the selected button of the second widget doesn't change. Any way to automate this?
And is it possible to synchronize widgets (buttons and filters) over several reports?
All filter widgets have to event handlers that we need:
on Selection - fire event on selection change
do Set Selection - consume event and provide selection on it's own options
Example:
Create two filters and configure similar query options.
After that you should configure Events for the first filter like in the screenshot:
and second Filter's event options are
And after this your widgets will work as desired.
I want to implement my own Widgets for a QListView. Like this:
If i click on this widget i want to do something.
In time, I only have experience with the QML-Version of the ListView.
Can someone explain how to insert this widget to the a QListView?
Greetings
UPDATE
In my Project i want a GUI like this:
In my first ListView I want to show items, that has a ListView, too. The text of each item can to be update.
There are 2 ways:
Set custom widget for each index: QAbstractItemView::setIndexWidget. Note: there may be problems with interaction with widgets. This way is typically used only for displaying static content.
Create custom QStyledItemDelegate and override editorEvent method. See model-view programming for details.
Update:
I propose you next design:
Create widget with image list + "dynamic content" + labels
Create ScrollArea with vertical layout and add there widgets (1.)
(2.) is prefferable than simple listview, because listview doesn't design for such cases. Listview designed for showing some data, but not to be a container for other complex widgets.
Pros: you will have fully interactable widgets.
Cons: you need to code a bit ;)
My custom QListView has delegates to paint the items. I'd like to add a live control to some of the row items (like a QLineEdit), that'll always be present in the row and will automatically scroll correctly with the list.
Since items are not widgets, I cannot assign a control to be a child of an "item", thus scrolling will leave the control in its fixed spot within the QListView widget.
Is there another way?
Is that even possible?
Normally the edit widget is created (and positioned) by the delegate when an QEvent::EnterEditFocus event occurs then destroyed when a subsequent QEvent::LeaveEditFocus occurs and the data is sent back to the model. The delegate should then repaint with the new model data.
Could you expand on what you mean by a "live" control?
Why would you want to have an edit widget constantly open? I think a better way to do this would be to create a delegate which paints the normal view (i.e. for Qt::DisplayRole) in a way which you want. Assuming you create your subclass view correctly, the delegate should still update when the model changes.
If you really want to do what you're asking though, I suspect you might be able to by:
creating your own item delegate (subclassing QAbstractItemDelegate)
reimplement createEditor() to use a QLineEdit
then use the delegate's updateEditorGeometry()
Have a read of the Delegate Classes section of the Introduction to Model/View Programming though first. The Spin Box Delegate Example and Pixelator Example are worth studying too if you haven't already.
I have a problem:
I'm creating a widget which displays current date's day number. It's like a button, but it's not derived from QPushButton class. Just from QWidget. So I've reimplemented enterEvent(), leaveEvent(), mousePressEvent(), mouseReleaseEvent(). I do call update() inside these methods and widget has realistic button behavior (paintEvent() is reimplemented also).
But when I change system date and hover that widget with other window, my widget doesn't get paintEvent() and the old date is displayed. Only when I place mouse over it, widget repaints it's contents.
I guess there is a feature (like buffering) which paints old contents on hovering with other window to avoid unnecessary recalculations. But I need to disable it. Tried to set many attributes (the Qt::WidgetAttribute enum). But it doesn't work.
I think you should find a way to detect that the system time has changed and call update() when that happens. Any other method (like detecting the "hovering" of a window or waiting for a mouse event) will cause the update to occur too late.