DDqtControls.h

Go to the documentation of this file.

/* This file is part of MoDELib, distributed under GNU GPL v2. */
#ifndef model_DDqtControls_H_
#define model_DDqtControls_H_
#include <QCheckBox>
#include <QGroupBox>
#include <QGridLayout>
#include <QLabel>
#include <QVBoxLayout>
#include <QShowEvent>
 
namespace model::controls
{
    // Keep the contents in one widget so collapsing preserves each child's own
    // visibility, enabled state, and nested group selection.
    class GroupBox : public QGroupBox
    {
        QWidget *body = nullptr;
 
      protected:
        void showEvent(QShowEvent *event) override;
 
      public:
        explicit GroupBox(const QString &title, QWidget *parent = nullptr);
    };
 
    inline QGroupBox *box(const QString &title, QWidget *parent, const QString &description,
                          QCheckBox *toggle = nullptr)
    {
        auto *group = new GroupBox(title, parent);
        group->setToolTip(description);
        group->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Maximum);
        new QGridLayout(group);
        if (toggle)
        {
            // Preserve existing actor handlers and programmatic state changes;
            // the visible group checkbox is the single user-facing control.
            group->setCheckable(true);
            group->setChecked(toggle->isChecked());
            toggle->hide();
            QObject::connect(group, &QGroupBox::toggled, toggle, &QCheckBox::setChecked);
            QObject::connect(toggle, &QCheckBox::toggled, group, &QGroupBox::setChecked);
        }
        return group;
    }
 
    inline QGridLayout *grid(QGroupBox *group)
    {
        return static_cast<QGridLayout *>(group->layout());
    }
 
    inline void field(QGridLayout *layout, int row, const QString &title, QWidget *input, const QString &description)
    {
        auto *label = new QLabel(title);
        label->setBuddy(input);
        label->setToolTip(description);
        input->setToolTip(description);
        input->setAccessibleName(title);
        layout->addWidget(label, row, 0);
        layout->addWidget(input, row, 1);
        layout->setColumnStretch(1, 1);
    }
} // namespace model::controls
#endif