how to change the background color of QTableWidgetItem

Qt Enthusiast

Hi All

How to set the background color of QTableWidget and as well setCellWidget
https://forum.qt.io/topic/97500/how-to-get-gray-background-headers-of-qtableview

Regards
Roshni

MasterBLB

use something like this:

QAbstractItemModel *model = yourTable->horizontalHeader()->model();
model->setData(model->index(0, 0), Qt::BackgroundRole, Qt::Grey);

dheerendra

For each of the item set like follows.
QTableWidgetItem::setData(Qt::BackgroundRole,Qt::grey)

I think your question is duplicate of other question. Please read the documentation based on the direction given by the group.

Qt Enthusiast

One more thing last

with this code

#include "mainwindow.h"
#include <QHeaderView>
#include <QTableWidgetItem>
#include <QLabel>
#include <QPushButton>

myWidget::myWidget(QWidget *parent) : QWidget(NULL) {
hbox = new QHBoxLayout;

QLabel* label = new QLabel;

label->setText("Options");
hbox->addWidget(label);

QPushButton* push = new QPushButton("+");
hbox->addWidget(push);
push->setMinimumHeight(20);
label->setMaximumHeight(20);

setMinimumWidth(100);
setStyleSheet("background-color:gray");
setLayout(hbox);

}

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent)
{

QTableWidget * t = new QTableWidget;
t->setColumnCount(5);
t->setRowCount(3);
QStringList headerLabels;

QString col1 = "No of Patterns";
QString col2 = "Set";
QString col3 = "Type";
QString col4 = " Pattern rules : pattern_1 : pattern_2 ";
QString col5 = "Options";
headerLabels << col1 << col2 << col3 << col4 << col5;
t->setHorizontalHeaderLabels(headerLabels);

t->setStyleSheet("QHeaderView::section { background-color:'light grey' }");

QColor color(QColor("light grey"));
QTableWidgetItem* item = new QTableWidgetItem("23");
item->setData(Qt::BackgroundRole,color);

QColor color1(QColor("light grey"));
QTableWidgetItem* item1 = new QTableWidgetItem("9");
item1->setData(Qt::BackgroundRole,color1);

QTableWidgetItem* item2 = new QTableWidgetItem("Set1");
item2->setData(Qt::BackgroundRole,color);

QTableWidgetItem* item3 = new QTableWidgetItem("Set2");
item3->setData(Qt::BackgroundRole,color);

t->setItem(0,0,item);
t->setItem(1,0,item1);
t->setItem(0,1,item2);
t->setItem(1,1,item3);

QComboBox* combox = new QComboBox;
t->setCellWidget(0,2,combox);
combox->addItem(QString(("T1")));
combox->addItem(QString(("T2")));

QComboBox* combox_1 = new QComboBox;
t->setCellWidget(1,2,combox_1);
combox_1->addItem(QString(("T1")));
combox_1->addItem(QString(("T2")));

QLineEdit * edit = new QLineEdit;
edit->setText(" aaa: aaa ");
t->setCellWidget(0,3,edit);

QLineEdit * edit1 = new QLineEdit;
edit1->setText(" bbb: bbb ");
t->setCellWidget(1,3,edit1);

myWidget* m = new myWidget;
t->setCellWidget(0,4,m);

QTableWidgetItem* item11 = t->item(0,4);
QColor color2(QColor("light grey"));

//item11->setBackgroundColor(color2);

/myWidget n = new myWidget;
t->setCellWidget(1,4,n);
t->item(1,4)->setBackground(QColor("light grey"));*/

//QColor color(QColor("light grey"));
//item->setData(Qt::BackgroundRole,color);

t->resizeColumnsToContents();
t->verticalHeader()->hide();
t->show();

}

MainWindow::~MainWindow()
{

}

https://ibb.co/g9vmWhZ

and I wanted option as

https://ibb.co/bbG20Sg

dheerendra

Read the documentation on how delegates work. There are lot of examples exist in the examples directory. You should be able to check & make it happen.

VRonin

As a side note, Windows style does not support setting the header background color: https://bugreports.qt.io/browse/QTBUG-31804

Qt Enthusiast

Using the same code

#include "mainwindow.h"
#include <QHeaderView>
#include <QTableWidgetItem>
#include <QLabel>
#include <QPushButton>

myWidget::myWidget(QWidget *parent) : QWidget(NULL) {
hbox = new QHBoxLayout;

QLabel* label = new QLabel;

label->setText("Options");
hbox->addWidget(label);

QPushButton* push = new QPushButton("+");
hbox->addWidget(push);
push->setMinimumHeight(10);
push->setMinimumWidth(10);
push->setMaximumWidth(20);
label->setMaximumHeight(50);
label->setMinimumHeight(30);