I am trying to use a QTextEdit with QGraphicsDropShadowEffect, but the caret is being overlapped by the shadow, maybe am I missing something?
I am using:
Windows 11 24H2 26100.4349
Qt Creator 17.0.0
Qt 6.9.1
Qt and Qt Creator installed via Qt Online Installer
[image: 023011bb-f185-4e4a-bf2d-40097910826f.gif]
#include <QApplication>
#include <QWidget>
#include <QTextEdit>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QPalette>
#include <QGraphicsEffect>
#include <QCheckBox>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
// ----- Main window ------------------------------------------------------
QWidget mainWindow;
mainWindow.setFixedSize(300, 300);
mainWindow.setWindowTitle("QTextEdit caret bug");
QPalette pal = mainWindow.palette();
pal.setColor(QPalette::Window, Qt::white);
mainWindow.setAutoFillBackground(true);
mainWindow.setPalette(pal);
// ----- QTextEdit --------------------------------------------------------
QTextEdit *textEdit = new QTextEdit;
textEdit->setFixedSize(200, 200);
textEdit->setText("Dark‑yellow bold 20 px text on transparent background");
textEdit->setFrameStyle(QFrame::NoFrame);
textEdit->setStyleSheet(
"QTextEdit {"
"background: transparent;"
"color: #B8860B;"
"font-weight: bold;"
"font-size: 20px;"
"}"
);
// ----- Drop shadow effect -----------------------------------------------
auto *shadowEffect = new QGraphicsDropShadowEffect(&mainWindow);
shadowEffect->setBlurRadius(10.0);
shadowEffect->setOffset(3, 3);
shadowEffect->setColor(QColor(0, 0, 0, 128));
textEdit->setGraphicsEffect(shadowEffect);
// ----- Checkbox to toggle shadow ----------------------------------------
auto *shadowCheckBox = new QCheckBox("Enable drop shadow");
shadowCheckBox->setStyleSheet("QCheckBox { color: black; }");
shadowCheckBox->setChecked(true);
QObject::connect(shadowCheckBox, &QCheckBox::toggled,
shadowEffect, &QGraphicsEffect::setEnabled);
// ----- Layout -----------------------------------------------------------
auto *vLayout = new QVBoxLayout(&mainWindow);
vLayout->addStretch();
auto *hText = new QHBoxLayout;
hText->addStretch();
hText->addWidget(textEdit);
hText->addStretch();
vLayout->addLayout(hText);
auto *hCheck = new QHBoxLayout;
hCheck->addStretch();
hCheck->addWidget(shadowCheckBox);
hCheck->addStretch();
vLayout->addLayout(hCheck);
vLayout->addStretch();
mainWindow.show();
return app.exec();
}
