I want to create a custom control like this tutorial.
However, I do not want to use SWT, but JavaFX. But I do not know what class I have to inherit and how I can render my view in JavaFX.
In the SWT example, the class EmailControlRenderer extends from TextControlSWTRenderer. From which class would I have to inherit if I want to render an EObject in JavaFX?
From the EMF Forms documentation, it seems the JavaFX renderer is very much experimental at this point, so chances are you will not be able to do what you want to do. Consider sending the developers a mail.
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I have a very common problem, but I couldn't find any valid solution.
I want to create a Button able to contain more than a simple Label or Image. In fact, Xamarin Button exposes only Text and Image properties, but in my case I want to construct a more flexible set of controls (e.g. a StackPanel with a list of controls).
I implemented a ContentView acting as a Button after having added TapGestureRecognizer and it works from the pure functional point of view. What I don't like is the missing of all Visual States of a Button.
Therefore, I was thinking how to implement a Custom Renderer of a Button. I would like to expose a ContentPresenter BindableProperty and then set that property to the Button.Content (speaking in UWP terms) in the Renderer class. I think this could be a solution, the problem is that I don't know how to "cast" a Xamarin.ContentPresenter to a UWP.ContentPresenter. Do you have any idea about how to implement a Button able to contain any generic Content?
Here in this tutorial a custom control named PieChart has been created by extending <QtQuick/QQuickItem> But I need to extend QQuickTextEdit I tried to find it but it seems QQuickTextEdit class is not available in in Qt framework. So I'm not able to extend it. Where could I find it?
How Can I extend a particular qt quick control (such as TextArea or TextBlock) in c++?
I got a external library, which includes a derived class from QGLWidget, very similar to that one here. In that library I have a class:
class PictureGLWidget : public QGLWidget { //.. }
This extends Qt's native QGLWidget and personalizes it. But it was not written by me, I just got it, via a *.dll. So then, I bind that Widget manually in my code to a layout like:
QGridLayout* layout = new QGridLayout;
layout->addWidget(myPictureGLWidget, 0, 1);
ui->verticalLayout_5->addLayout(layout);
since I designed my MainWindowWidget with the integrated QtDesigner, which is by the way very comfortable, I would like to handle my myPictureGLWidget also in the QtDesigner, since I am currently redesigning the MainWindow.
Is there a way doing that? Thnx in advance!
Qt Designer supports any foreign widget class without needing to provide plugins for that. You only have to accept that the widget's properties and appearance won't be available within Designer.
Insert a dummy QWidget into the layout.
Right click on the widget, select "Promote to...".
Add PictureGLWidget as a new class promoted from QWidget. Specify appropriate header files etc.
Promote your widget to PictureGLWidget.
When this is done, the code generated by uic will instantiate a PictureGLWidget where you need it, instead of a dummy QWidget.
If you want to use the PictureGLWidget in the designer instead of a dummy widget, you can write a designer plugin that wraps the widget and exposes it in the widget pallette, provides property support, etc.
I might have misunderstood your question but don't you just add a QGLWidget to your design in Designer. Right click the widget and select Promote to... ?
Yes, you are right. We have QListView already, it is prefect when we are trying to display simple list with Model/View.
But, QListView has lots of problem when we need to display complex list with rich text and widgets. Just think about a timeline-listview for Facebook or Twitter.
Sure, we can implement our own delegate for rich text or images, but ListView can print static item only. So, there isn't a way to show clickable hyperlink (you can calculate position of the mouse and hyperlink, but it is a really drity work) or load asynchronous images.
Well, QListWidget seems our solution. We can put widgets into it. But. we will lost our Model/View/Delegate architecture, that is terrible!
Now, my solution is writing my listview in QML. Other widget are still native Qt widget. (I don't like a non-native pure QML user interface.)
QML is really flexiable when doing that kind of work. Then export my model, finally put a viewer into my QMainWindow. But coding in two programming languages and trying to communicate with other native widget is really difficult.
So, is there a way to use Qt's Model/View architecture with QListWidget? Or I have to implement them by myself?
QListWidget does use Qt's MVC, as it derives from QListView and...
QListWidget uses an internal model to manage each QListWidgetItem in
the list.
Just use QListWidget::model () const to access the model.
I am new to Qt and am slowly finding my way around. My goal is to have a QListView of a QFileSytemModel where the names of the files in the icons wraps, similar to the behavior found on any OS where the text gets split if the name is too long.
From perusing the internet, I believe I need to create a custom class that extends QAbstractItemDelegate to do my special drawing and text wrapping. However, I haven't been able to find the default ItemDelegate that the stock QListView class uses out of the box.
The reason I want the default class is so I can poke around and figure out more about the life-cycle of Qt components while working on my own renderer. I was wondering if anyone knew of where the default renderer for the QListView class could be found?
If you want to show icons with text, QListView has a mode to do that, just set the view mode to QListView::IconMode using QListView::setViewMode(). If you still want to customize display features it is right that you should implement a custom item delegate, preferably subclassing QItemDelegate and overriding paint() with your own implementation.