Glad it works. So this part is solved then.

Glad it works so far.
Good luck with the rest.

@pauledd
:)
class MyWidget : public QWidget << yes that is subclassing :)

Also, a widget can only paint on it self.
its not possible to paint on other widget from inside a
paintevent.
Thats why the first sample didnt work. You asked painter to paint on tab from inside mainwindows paintEvent :)
I guess you already found out but its just to make clear for other readers.

@mrjj How to add and delete rows in table by clicking spinbox up and down arrow? Please help me through python code.

Ok, now works perfectly, but I would ask if you can change the animation drag'n'drop between the lines. Currently, during the row drag it appears a copy of a line anchored to the mouse cursor. You can change this animation?

#include <QWidget> #include <QTableWidget> #include <QDropEvent> #include <QDragMoveEvent> #include <QDropEvent> #include <QMimeData> #include <QDebug> #include <QKeyEvent> #ifndef DTABLEWIDGET_H #define DTABLEWIDGET_H class DTableWidget : public QTableWidget { Q_OBJECT public: DTableWidget(QWidget *parent = 0); public slots: signals: void keyboard(QKeyEvent *event); void dropped(const QMimeData* mimeData = 0); void moved(int old_row, int new_row); protected: void dragEnterEvent(QDragEnterEvent *event); void dragMoveEvent(QDragMoveEvent *event); void dragLeaveEvent(QDragLeaveEvent *event); void dropEvent(QDropEvent *event); void keyPressEvent(QKeyEvent* event); private: }; #endif #include <QtGui> #include "dtablewidget.h" #include "nofocusproxystyle.cpp" DTableWidget::DTableWidget(QWidget *parent) : QTableWidget(parent) { //set widget default properties: setFrameStyle(QFrame::Sunken | QFrame::StyledPanel); setDropIndicatorShown(true); setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn); setEditTriggers(QAbstractItemView::NoEditTriggers); setDragDropMode(QAbstractItemView::DropOnly); setAlternatingRowColors(true); setSelectionBehavior(QAbstractItemView::SelectRows); setShowGrid(false); setAcceptDrops(true); setWordWrap(false); setStyleSheet("selection-background-color: yellow;" "selection-color: #002041;" "font-size: 75%;" ); setStyle(new NoFocusProxyStyle()); } void DTableWidget::dragEnterEvent(QDragEnterEvent *event) { event->acceptProposedAction(); } void DTableWidget::dragMoveEvent(QDragMoveEvent *event) { event->acceptProposedAction(); } void DTableWidget::dropEvent(QDropEvent *event) { event->acceptProposedAction(); if (event->mimeData()->urls().size() > 0) emit dropped(event->mimeData()); else { QPoint old_coordinates = QPoint(-1,-1); int dropAction = event->dropAction(); if(currentItem() != NULL) //Check if user is not accessing empty cell { old_coordinates = QPoint(currentItem()->row(), currentItem()->column()); } QTableWidget::dropEvent(event); qDebug() << "Detected drop event..."; if(this->itemAt(event->pos().x(), event->pos().y()) != NULL && old_coordinates != QPoint(-1, -1)) { qDebug() << "Drop Event Accepted."; qDebug() << "Source: " << old_coordinates.x() << old_coordinates.y() << "Destinition: " << this->itemAt( event->pos().x(), event->pos().y() )->row() << this->itemAt( event->pos().x(), event->pos().y() )->column() << "Type: " << dropAction; emit moved(old_coordinates.x(), itemAt( event->pos().x(), event->pos().y())->row()); } } } void DTableWidget::dragLeaveEvent(QDragLeaveEvent *event) { event->accept(); } void DTableWidget::keyPressEvent(QKeyEvent *event) { emit keyboard(event); }

saveToCsv(m_tableWidget->model(), QFileDialog::getSaveFileName(this,tr("Save to csv"),QString(),tr("Comma separated values (*.csv)")) ); loadFromCsv(m_tableWidget->model(), QFileDialog::getOpenFileName(this, tr("Open csv"),QString(),tr("Comma separated values (*.csv)")) );

Hi,

If you don't want any scrollbars then you have to ensure that the widget is big enough to show everything.

QTableWidget already has an internal model otherwise it's a QTableView.

@mrjj Thank you!
Sooo i kind of did what you said and used the currentIndexChanged signal. I made a Qbytearray where i store the currentindex and replace the index when an index changed. Then i can use this array to get the currentIndex from the row where the button was pressed. I know that there is probably a better solution but it works^^
I will mark this post as answered i guess.

Hi,

You'll likely have to implement a custom QStyledItemDelegate and do the painting yourself to match what you want.

@VInay123 Hi! This works for me (Qt 5.6):

connect( ui->tableWidget->verticalHeader(), SIGNAL(sectionClicked(int)), this, SLOT(sayHi()) );

Mayby try using Qt's signal slot system:

//A->reciver //B->sender //B signals: void B::newData_ready(QString data); //you have to pass apropriate type, assuming QString since it is from QLineEdit slots: void B::on_SendButton_clicked() { emit newData_ready(userData_LineEdit->text()); } //A slots: void A::on_newData_ready(QString data) { QTableWidgetItem *item = new QTableWidgetItem(data); //here add item where u want } connect(B, SIGNAL(newData_ready(QString)), A, SLOT(on_newData_ready(QString)));

Just a scheme so it probably wont work like that but I hope you get the point.

I solved it,
ui->tableWidget->setFocus();
ui->tableWidget->setCurrentCell(N-1,0);

The problem that I was confused, because the first row is 0 not "1". So when I insert a row N, I will have a total rows = N - 1.

So, my problem was an error of positioning.

Thanks Guys!!.

Has anyone found a solution to this? I'm using a QTableWidget on macOS and having the same issue. The table is always at least 76 pixels tall, even when the verticalHeader is smaller than that. Changing the minimum height for the table and/or the header (to something small like 3 pixels) doesn't change the table height; it's still 76. Once I add more rows (so that the height is > 76) the table works just fine.

@SGaist Indeed, you're right When I set the properties for my table I set that the number of rows was "1" so I have to create an "int" variable and then say that the number of rows is that variable starting from 1 and then increment that number on the loop.

@SGaist

Thank you. That seemed to be the last missing piece. It does what I want now.

@mrjj Thanks :)

@mrjj Ok so, it seems that it doesn't detect the table "usuarios" even though it's there...

So in my sqlite editor I executed the command and it worked properly:
http://s18.postimg.org/iqry91pmx/image.png

EDIT: I solved that problem: the program was searching the db in the remote directory not in the real directory, now it doesn't says any error but It doesn't shows the information.

I've tried (SELECT * FROM usuarios) but nothing, it doesn't works.

2ND EDIT: I solved the problem, it was on my printing method, I tried a much simpler methor by doing:

int i=0; while (query.next()) { ui->tableWidget->setItem(i,0,new QTableWidgetItem(query.value(0).toString())); ui->tableWidget->setItem(i,1,new QTableWidgetItem(query.value(1).toString())); ui->tableWidget->setItem(i,2,new QTableWidgetItem(query.value(2).toString())); i++; ui->tableWidget->insertRow(i); }

Thank you for your help.

Hi,

Why not do that at the editor level ? Using e.g. a QStyledItemDelegate. Doing so would avoid user entering anything that's incorrect.