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Input

A native text field with placeholder, password and validation support.

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Live C++Source and licences
#include <QApplication>
#include <QFile>
#include <QHBoxLayout>
#include <QLabel>
#include <QPainter>
#include <QStandardItemModel>
#include <QUrl>
#include <QVBoxLayout>
#include <array>
#ifdef SHADCN_GALLERY_MEDIA
#include <shadcn/media.hpp>
#endif
#include <shadcn/shadcn.hpp>

QWidget* example(QWidget* parent = nullptr) {
    using namespace shadcn;
    auto* canvas = new QWidget(parent);
    canvas->setAutoFillBackground(true);
    auto* outer = new QHBoxLayout(canvas);
    outer->setContentsMargins(32, 32, 32, 32);
    auto* host = new QWidget(canvas);
    auto* layout = new QVBoxLayout(host);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->setSpacing(16);
    outer->addStretch();
    outer->addWidget(host, 0, Qt::AlignCenter);
    outer->addStretch();
    auto* input = new Input(host);
    input->setPlaceholderText("Email");
    input->setAccessibleName("Email");
    input->setFixedWidth(320);
    layout->addWidget(input);
    return canvas;
}

Installation​

add_subdirectory(shadcn-cpp)
target_link_libraries(app PRIVATE shadcn::widgets)

Usage​

#include <shadcn/widgets.hpp>

shadcn::Input input(parent);
input.setPlaceholderText("Course name");
input.setEchoMode(QLineEdit::Password);
input.setError("A course name is required.");

An empty error clears the invalid state and accessible description.

API​

The class keeps the native QLineEdit text, selection, clipboard, undo and input method behavior. setInvalid changes the visual state. setError updates the accessible description.

Keyboard and accessibility​

Qt provides text editing keys, focus handling and input method support. Pair the field with a Label and set a visible error message when validation fails.