Nov. 25, 2019, 3:35 p.m.

QML

clip, OpacityMask, ListView, QML

Quite often, the same question arises on the forum regarding the problem of displaying content embedded in any QML objects.

The most common manifestation of this problem is when ListView content scrolls beyond its scope. In any case, this is one of those frequent cases when beginners encounter this problem when starting to learn QML. Well, or another option when faced with such a problem when using Rectangle objects.

In the following image below, you can see two application windows that illustrate this problem.

  • The left window shows what the layout looks like initially
  • The right window shows that if you start scrolling through ListView content, it will go under the Title text, although it should have been cropped.

m
Jan. 10, 2019, 3 p.m.
mihamuz

QML

Добрый вечер. Написал свою модель на основе QAbstractListModel как тут . Все заработало но у меня элементов больше чем в примере. Соответственно не все помещаются в область ограниченную высотой height:200. При прокрутке списка оставшиеся элементы вне поля видимости не подгружаются.П…

m
Nov. 28, 2018, 11:03 a.m.
master199

Android

ListView, как сохранить позиции после поиска?

k
June 6, 2018, 3:57 a.m.
kabanov

QML

как по нажатию ENTER переключаться на следующий элемент

May 17, 2018, 11:50 a.m.

Django

Django, filter, django-bootstrap3, ListView

Благодаря FilterView можно упростить и уменьшить код для отображения товаров, продуктов и тд. Что позволит уменьшить код в разы! Сначала я использовал ListView и писал много когда для того, чтобы можно было бы отфильтровать по запросам. Пока один из хороших знакомых мне не посоветовал django-filter . Прочитав про него больше я понял что это то что нужно. После, когда я хотел все свои вьюшки использовать как обьект. Это меня немного озадачило, пока знакомый снова меня не выручил подсказкой об использовании FilterView, а теперь более подробней обсудим её:

March 15, 2017, 2:12 p.m.

Django

Pagination, Django, django-bootstrap3, ListView

In one of the previous articles , the option of introducing a page with articles pagination was shown, which can be the main page of the site, for example. In this case, django-bootstrap3 was used.

But if the page does not represent any special functionality, in addition to displaying the list of articles, for example, then you must use the generic classes. One of which is ListView . This will reduce the program code of the project and, accordingly, simplify it.

The ListView class allows you to specify a template that will be rendered to display the table, specify a data model or queryset that will need to be shown, as well as the number of objects per page that will be displayed when paginated.

IndexView

Let's recall how the previous View of the class looked to display the list of pages.

class IndexView(View):
 
    def get(self, request):
        context = {}
        # Taking all of the published article, sorted by date of publication
        all_articles = Article.objects.filter(article_status=True).order_by('-article_date')
        # Create Pagination, in which we send article and show,
        # that there will be 10 pieces on one page
        current_page = Paginator(all_articles, 10)
 
        # Pagination in django_bootstrap3 send response in this view:
        # "GET /?page=2 HTTP/1.0" 200,
        # So you need to pick up the page and try to pass it in Paginator, to find the page
        page = request.GET.get('page')
        try:
            # If there is, then choose this page
            context['article_lists'] = current_page.page(page)  
        except PageNotAnInteger:
            # If None, then select the first page
            context['article_lists'] = current_page.page(1)  
        except EmptyPage:
            # If you have gone beyond the last page, it returns the last
            context['article_lists'] = current_page.page(current_page.num_pages) 
 
        return render_to_response('home/index.html', context)
Dec. 21, 2016, 7:21 a.m.
Vitalij Antipov

QML

На основе урока “База данных SQLite и работа с ней в QML Qt” делаю проект с представлением данных в ListView. Уперся в удалении записи из списка, точнее в получении индекса(Id) выбранного элемента. При выборе (подсветке) элемента кликом мыши значение view.currentIndex соответствует выбр…

Nov. 9, 2015, 4:03 a.m.

QML

ListView, ListModel, TextInput, Model, Delegate, QML, Qt, Android, View

Working with the ListView in QML is a fairly common aspect in the development of Android applications, since many applications have in their functional building lists of data, records, settings, etc. It is also true in developing a Desktop applications with QML principle would be the same for both platforms.

For its consideration of the transfer of information in the list offer carefully consider the following scenario of interaction with the ListView .

The principle of view data in the ListView

ListView object has two important properties:

  1. delegate - which determines the appearance of a single element ListView
  2. model - which placed the data of each element

The transmission model can be used ListModel object that contains the data for each item in the list. The data assigned to variables that have been assigned to certain properties of the objects in the delegate. In the figure below has two delegate objects Text, text properties which the variables text_first and text_second assigned. These variables determine which will be substituted data from each ListElement in ListModel . As can be seen from the figure, each ListElement has two properties, the name of which is identical to the variables that are assigned to the delegate. In fact, these variables are roles, which put a value of ListModel . So we get ListView with text fields, which are filled with the data that have been made in each ListElement in ListModel .

Oct. 26, 2015, 1:25 p.m.

QML

Android, ListItem, ListModel, ListView, QML, Qt

I have already told in the article about the creation of dynamic widgets to Qt , how to create and delete buttons dynamically, as well as how to interact with them. And there used Vertical Layout, a case we can use QML ListView Qml, both similarly used when programming in Java for Android. That, incidentally, is also applicable when programming in Qt for Android.

The article about the dynamic creation of widgets used for example QButton class objects. This article will use the objects Button Qml, which customization was discussed in the following article . But the key will be placed in the ListView Qml.

Project structure for ListView Qml

This time dispense project created by default and even without the designer interface. Especially because at the time of this writing, not all parameters can be set in the designer. A following project structure:

  • QmlDynamic.pro - the profile of the project;
  • deployment.pri - deploy rules file on the target platform;
  • main.cpp - the main application startup file;
  • main.qml - qml file with the original program codes
July 21, 2015, 9:55 a.m.

Android

ListView, ListAdapter, Android

Customization ListView is common in developing applications for Android OS. ListView (List) allows you to display the same type of information in your application, for example, show the products with prices and features, if you develop applications for online sales. At the same time being in fact a routine operation, however, some questions for novice developers deliver a lot of inconvenience. Some of these inconveniences and questions will be discussed in this article.

Project structure

This lesson is proposed to establish a small list with the flags of countries, called the currencies of these countries, and the abbreviation of the country.

Total is used to create a list of four countries: Russia, South Africa, Singapore, Turkey. Flags of these countries are in the drawable folder. Also there is an xml file to create backgrounds ListViewi flags. For storing names and abbreviations used strings.xml file. Also, a separate xml file to create the ListView layout.

In the Project there are three classes:

  1. MainActivity
  2. MyListAdapter - which is responsible for the transmission of data in the form of a list item
  3. DataFlags - class that is designed to facilitate the transfer of data to the adapter ListView
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Dec. 5, 2019, 8:01 a.m.
Sergej Bederin

C++ - Test 001. The first program and data types

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Last comments
Dec. 5, 2019, 4:15 p.m.
Evgenij Legotskoj

В этом слоте ваам нужно будет правильно смаппить координату. У QGraphicsView есть методы mapToScene, mapFromScene. Попробуйте использовать их.
LP
Dec. 5, 2019, 8:30 a.m.
Leonid Pivovarov

А без переопределения qgraphicsScene это сделать возможно? Есть же коорината нажатия кнопки мыши slotCustomMenuRequested(QPoint)
Dec. 5, 2019, 8:11 a.m.
Mihailll

//qDebug()<<"position:"<<event->pos(); //qDebug()<<"position:"<<event->screenPos(); qDebug()<<"position:"<<event->scenePos();
LP
Dec. 5, 2019, 8:09 a.m.
Leonid Pivovarov

Подскажите пожалуйста, К graphicsView я подключил обработку контекстного меню: сonnect(ui->graphicsView, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(slotCustomMenuRequest…
Dec. 4, 2019, 3:49 p.m.
Evgenij Legotskoj

resources_big - это флаг для сборки c++ приложения. Если Nuitka не предоставляет какой-либо функционал для прикручивания конфигурационных директив типа CONFIG при компиляции, то сомнева…
Now discuss on the forum
Dec. 5, 2019, 4:12 p.m.
Evgenij Legotskoj

Это уже кастомная стилизация. Придётся отключать обрамление и самостоятельно реализовывать ресайз окна, его перемещение, стиль и т.д. Вот статья, как отключить обрамление окна - QML …
Dec. 5, 2019, 4:27 a.m.
qml_puthon_user

Вот код, вдруг, кому поможет. Код основной формы: import QtQuick 2.12import QtQuick.Controls 2.12import QtQuick.Layouts 1.3import "./Components/Panels" as PanelsApplicationWindow{…
Dec. 5, 2019, 2:50 a.m.
Evgenij Legotskoj

Создавайте новые темы, чтобы не было всё в куче.
Dec. 4, 2019, 10:07 p.m.
qml_puthon_user

Спасибо за помощь! :) Я попытаю надежды в ожидании QtQuick3D от Riverbank'a. :)
V
Dec. 4, 2019, 7:02 a.m.
Vitali

Со временем распаковки соласен - для слабых ноутов это проблема и именно Nuitka мог бы здесь помочь, если бы заработало. А QtlFW - это уже фреймфорк для создания инсталятора из имеющихся па…
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