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QDoubleValidator passes the commas, does not points

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Duquan last edited by

QDoubleValidator Allows the use of a comma as a partitioner. The number further calculated from the lineandit is therefore not taken as double♪ How do you replace the comma by the point?
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morde last edited by
An English lonel may be requested for the valet, where the separation point is
```
QLocale locale(QLocale::Englishs);
validator->setLocale(locale);
```
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Sort database records in VARCHAR with point and comma
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If the expected ordination is for numerical value, you can convert only to the ORDER BY. Example:SELECT *, CAST(representantes_vendas.valor AS INT) FROM representantes_vendas INNER JOIN representantes ON representantes_vendas.codigo_repre = representantes.codigo ORDER BY CAST(REPLACE(REPLACE(x.valor, ".", ""), ",", ".") AS DECIMAL(20, 2)) DESC
How to count IDs by location from start point and end point data
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I used crossjoin in MySQL.# 適当なテーブルを作成 CREATE TABLE id_tbl (ID int, start int, end int); # insert data SELECT * FROM id_tbl; +------+-------+------+ | ID | start | end | +------+-------+------+ | 1 | 0 | 3 | | 2 | 1 | 3 | | 3 | 2 | 3 | | 4 | 0 | 1 | | 5 | 1 | 2 | +------+-------+------+ query SELECT C AS POINT, COUNT(C) AS COUNT, GROUP_CONCAT(ID) AS PERSONS FROM ( SELECT DISTINCT(C) FROM ( SELECT start AS C FROM id_tbl UNION ALL SELECT end AS C FROM id_tbl ) AS _ ORDER BY C ) AS _ CROSS JOIN id_tbl AS B ON C >= B.start and C <= B.end GROUP BY C; => +-------+-------+---------+ | POINT | COUNT | PERSONS | +-------+-------+---------+ | 0 | 2 | 1,4 | | 1 | 4 | 1,2,4,5 | | 2 | 4 | 1,2,3,5 | | 3 | 3 | 1,2,3 | +-------+-------+---------+
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There's no way to use the DNS server exactly, which is where the host comparison database is stored:
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Study. http://ffmpeg.org/doxygen/3.0/index.html (or use mine) https://github.com/h4tr3d/avcpp (but the filters are not finished) http://ffmpeg.org/doxygen/3.0/examples.html ♪ Study. http://ffmpeg.org/ffmpeg-filters.html ♪ Yeah. http://ffmpeg.org/documentation.html , especially in the Component Documentation section, there are lists of formats, codes, their options, and so on, what will be needed in the work.Then proceed. Start with the algorithms in the form of consolidated applications: they gave the file to the entrance, used the conversions, recorded it on the way out - such examples will make it easier to contain the mistakes (and they will be, I guarantee you - API FFmpeg is not for weak spirits, but all the underwater stones I can't tell you in a week, when new ones are regularly opened). In any case, specific questions could already be asked.And, yes, the FFmpeg filters can be used independently of the other component - the most important thing is to create and fill up. AVFrameYou'll feed him. Consider that there may be a delay in filters, which means that by filling one footage, you don't have to get a converted out, and you only get it after N feeding to the inlet, some filters are dependent on the results of treatment of neighbouring staff. In such cases, at the end, we need to get the rest of the shipment. NULL-Freme. Maybe there's another situation where you have N weekends for one sent fream.
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Can you help me, please, have a cell field, how do you refresh the neighbors when we start a mouse? Qt QML
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import QtQuick 2.0 Item { width: 640 height: 640 Grid { columns: 8 anchors.fill: parent Repeater { id : field model: 64 Rectangle { width: 80 height: 80 property var neibours : [index - 8, index + 8] .concat(index % 8 == 0 ? []: [index - 1, index + 7, index - 9]) .concat((index - 7) % 8 == 0 ? [] : [index + 1, index - 7, index + 9]) .filter((neibour) => (neibour >= 0 && neibour < 64)) border.color: 'blue' MouseArea { anchors.fill: parent hoverEnabled: true onEntered: { color = 'red' neibours.forEach( (neibour) => field.itemAt(neibour).color = 'yellow') } onExited: { color = 'white' neibours.forEach( (neibour) => field.itemAt(neibour).color = 'white' ) } } } } } } We need to count the catholic element of the neighbors and squeeze them on the reeater-a index. The neighbors can be counted in advance as me or within my functions.
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Got it. QCustomPlot http://qcustomplot.com I am. QWT http://qwt.sourceforge.net ♪ Subjectively, qcustomplot offers more interactive opportunities that are detailed and implemented in examples
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The container for pictures is used ImageListpublic partial class MainView : Form { private static Random _random = new Random(); public MainView() { InitializeComponent(); this.StartPosition = FormStartPosition.CenterScreen; this.Text = "Пример отображения картинок и радиокнопок"; _buttonChange.Click += ButtonChange_Click; } private void ButtonChange_Click(object sender, EventArgs e) { int maxIndex = _imageList.Images.Count; foreach (var rButton in _groupBox.Controls.OfType<RadioButton>()) { rButton.Image = _imageList.Images[_random.Next(0, maxIndex)]; } } }
Timeout works after QTimer stops.
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Qt removal should be done by deleteLaterThere is no guarantee that, when the timer is removed, there will be no developments that will be encouraging in the next round of processing.Decision - Yes. disconnectwhen the timer is no longer necessary.
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Fixed operation of objects created in QTTab
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tabWidget (QTabWidget) sQPlainTextEdit) How to refer and understand.What is this? (1,1) of the current tabQPlainTextEditExample of setting current time)QPlainTextEdit* editor3 = qobject_cast<QPlainTextEdit*>( qobject_cast<QGridLayout*>( tabWidget->currentWidget()->layout() )->itemAtPosition(1, 1 + 1)->widget() ); editor3->setPlainText(QDateTime::currentDateTime().toString()); ClosetabWidgetThe layout specified inQGridLayoutandThe first column of the layout is QLabel.I think difficult to say that maintainability is good,QPlainTextEdit2D arrayI think that it is better to set the settings and values in the tab.Example of two-dimensional array: QVector<QVector<QPlainTextEdit> >)
Problem with ("select username, points from date order by points desc limit 10");
Software Programming • php mysql • • Marcee

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1 fetch is required to read each record. So repeat fetch after showing the top_1 data. (and use indexes 0 and 1 again)If you want to show all 10, it is more practical to put your fetch within the condition of a while.EDIT: As you updated your question, I update my answer. The following is the passage of code in question:while($get = $select->fetch_array()) { $nome = $get[0]; $pontos = $get[1]; //faz algo com $nome e $pontos } This will read the names and scores of the first 10.
Longevity of the life of a variable in a charade-indicator in the lymbde
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ptrIf there's no reference to him anywhere else, it'll be deleted exactly when deleteLater signal watcher will be carried out in the event of the flow loop which contains it. Method issue testMethod() It doesn't affect life. ptrOh, well. ptr Located for him, many challenges. testMethod Just building new ones. ptrThat's it.
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How to use SQLite on Qt 5.7 with Android
Software Programming • android c++ qt databank • • guilherme

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The author found the solution: follow below what he posted:After a lot of breaking can find the problem! The problem occurred because I performed a check if the bank existed and how the bank on android does not specifically stay in the same folder as the app it returned that the bank did not exist. This way I'm posting is working on Android and Windows. DBConnection header#ifndef DBCONNECTION_H #define DBCONNECTION_H #include <QObject> #include <QSqlDatabase> #include <QSqlError> enum TypeDBConnection{ QDB2, QIBASE, QMYSQL, QOCI, QODBC, QPSQL, QSQLITE, QSQLITE2, QTDS }; class DBConnection { protected: QSqlDatabase db; QString dbname; TypeDBConnection type; public: QString getDBName(); TypeDBConnection getTypeConnection(); DBConnection *setDBName(QString value); DBConnection *setTypeConnetion(TypeDBConnection value); bool open(); void close(); }; #endif // DBCONNECTION_H DBConnection Class#include "dbconnection.h" QString DBConnection::getDBName() { return this->dbname; } TypeDBConnection DBConnection::getTypeConnection() { return this->type; } DBConnection *DBConnection::setDBName(QString value) { this->dbname = value; return this; } DBConnection *DBConnection::setTypeConnetion(TypeDBConnection value) { this->type = value; return this; } bool DBConnection::open() { switch (this->type) { case QDB2: this->db = QSqlDatabase::addDatabase("QDB2"); break; case QIBASE: this->db = QSqlDatabase::addDatabase("QIBASE"); break; case QMYSQL: this->db = QSqlDatabase::addDatabase("QMYSQL"); break; case QOCI: this->db = QSqlDatabase::addDatabase("QOCI"); break; case QODBC: this->db = QSqlDatabase::addDatabase("QODBC"); break; case QPSQL: this->db = QSqlDatabase::addDatabase("QPSQL"); break; case QSQLITE: this->db = QSqlDatabase::addDatabase("QSQLITE"); break; case QSQLITE2: this->db = QSqlDatabase::addDatabase("QSQLITE2"); break; case QTDS: this->db = QSqlDatabase::addDatabase("QTDS"); break; default: this->db = QSqlDatabase::addDatabase("QSQLITE"); break; } this->db.setDatabaseName(this->dbname); //não é necessário validar o caminho do BD em android, pois o mesmo o cria! //if (QFile::exists(this->dbname)) try { return db.open(); }catch(...) { qDebug() << db.lastError().text(); } return false; } void DBConnection::close() { db.close(); } Using the class#include <QGuiApplication> #include <QDebug> #include "dbconnection.h" int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); QQmlApplicationEngine engine(QUrl("qrc:/main.qml")); DBConnection db* = new DBConnection(); qDebug() << "Comunicou com bd: " << db->setDBName("Data.db")->setTypeConnetion(QSQLITE)->open(); delete(db); return app.exec(); } https://github.com/maniero/SOpt/blob/master/CPP/Qt/Database.cpp .
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Set points on the N-line so that there is enough space between any neighbouring points?
Software Programming • javascript algorithm emergency numbers • • charlenef

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I think it's easier to go, so to say, backwards: N points required distance * N Place. Accordingly, it remains free = max - distance * N free space to be further distributed between points. Generate N Chisel on the cut [0, free], thus breaking this cut by N + 1 parts, add these parts between points and before and after.Comment: It is assumed that the distance from the extreme points to the end of the cut should also be at least as low as distance♪ The modification of the algorithm for another case is proposed as exercise. :
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How to separate points
Software Programming • c sharp • • fbio

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I didn't know exactly what you needed, but as an option, you can compare X if you're equal to Y. In this option, only the points of convergence will be equal. The comparator may be modified for example:public int CompareTo(object i) { Point obj = i as Point; if (X == obj.X) return Y - obj.Y; else return X - obj.X; }
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Qt c++ how to launch the program if it's not possible?
Software Programming • c++ qt • • Rossere

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Use the toilet. windeployqt - she'll copy the necessary files.For the collection of the archive with the Autonomous Programme, you need to be called windeployqt selected Qt in your folder. exeFor example Qt installed in the directory c:/Qt/ and selected Qt5.15.2 / Visual Studio 2019 x64and the computerized programme is located c:/project/build/release/♪Then you'll need to follow the command sequence.set QT_PATH=c:\Qt\5.15.2\msvc2019_64\bin set EXE_PATH=c:\project\build\release @rem добавим путь до windeployqt в PATH set PATH=%QT_PATH%;%PATH% @rem перейдем в папку с программой cd %EXE_PATH% @rem запустим копирование библиотек windeployqt . As a result, some 50 to 70 megabytes are collated in the programme folder.

QDoubleValidator passes the commas, does not points

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