File indexing completed on 2024-06-02 05:19:15

 /*
  *  radiobutton.cpp  -  radio button with read-only option
  *  Program:  kalarm
  *  SPDX-FileCopyrightText: 2002-2019 David Jarvie <djarvie@kde.org>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "radiobutton.h"
 
 #include <QMouseEvent>
 #include <QKeyEvent>
 
 
 RadioButton::RadioButton(QWidget* parent)
     : QRadioButton(parent)
     , mFocusPolicy(focusPolicy())
 { }
 
 RadioButton::RadioButton(const QString& text, QWidget* parent)
     : QRadioButton(text, parent)
     , mFocusPolicy(focusPolicy())
 { }
 
 /******************************************************************************
 *  Set the read-only status. If read-only, the button can be toggled by the
 *  application, but not by the user.
 */
 void RadioButton::setReadOnly(bool ro)
 {
     if (ro != mReadOnly)
     {
         mReadOnly = ro;
         setFocusPolicy(ro ? Qt::NoFocus : mFocusPolicy);
         if (ro)
             clearFocus();
     }
 }
 
 /******************************************************************************
 *  Specify a widget to receive focus when the button is clicked on.
 */
 void RadioButton::setFocusWidget(QWidget* w, bool enable)
 {
     mFocusWidget = w;
     mFocusWidgetEnable = enable;
     if (w)
         connect(this, &RadioButton::clicked, this, &RadioButton::slotClicked);
     else
         disconnect(this, &RadioButton::clicked, this, &RadioButton::slotClicked);
 }
 
 /******************************************************************************
 *  Called when the button is clicked.
 *  If it is now checked, focus is transferred to any specified focus widget.
 */
 void RadioButton::slotClicked()
 {
     if (mFocusWidget  &&  isChecked())
     {
         if (mFocusWidgetEnable)
             mFocusWidget->setEnabled(true);
         mFocusWidget->setFocus();
     }
 }
 
 /******************************************************************************
 *  Event handlers to intercept events if in read-only mode.
 *  Any events which could change the button state are discarded.
 */
 void RadioButton::mousePressEvent(QMouseEvent* e)
 {
     if (mReadOnly)
     {
         // Swallow up the event if it's the left button
         if (e->button() == Qt::LeftButton)
             return;
     }
     QRadioButton::mousePressEvent(e);
 }
 
 void RadioButton::mouseReleaseEvent(QMouseEvent* e)
 {
     if (mReadOnly)
     {
         // Swallow up the event if it's the left button
         if (e->button() == Qt::LeftButton)
             return;
     }
     QRadioButton::mouseReleaseEvent(e);
 }
 
 void RadioButton::mouseMoveEvent(QMouseEvent* e)
 {
     if (!mReadOnly)
         QRadioButton::mouseMoveEvent(e);
 }
 
 void RadioButton::keyPressEvent(QKeyEvent* e)
 {
     if (mReadOnly)
     {
         switch (e->key())
         {
             case Qt::Key_Up:
             case Qt::Key_Left:
             case Qt::Key_Right:
             case Qt::Key_Down:
                 // Process keys which shift the focus
             case Qt::Key_Escape:
                 break;
             default:
                 return;
         }
     }
     QRadioButton::keyPressEvent(e);
 }
 
 void RadioButton::keyReleaseEvent(QKeyEvent* e)
 {
     if (!mReadOnly)
         QRadioButton::keyReleaseEvent(e);
 }
 
 #include "moc_radiobutton.cpp"
 
 // vim: et sw=4: