lineeditbuttonmanager.cpp

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 **********************************************************************/
 
#include "lineeditbuttonmanager.h"
#include <stdexcept>
#include <QLineEdit>
#include <QStyle>
#include <QToolButton>
#include <QEvent>
#include <QtDebug>
 
namespace LC::Util
{
    LineEditButtonManager::LineEditButtonManager (QLineEdit *edit)
    : QObject { edit }
    , Edit_ { edit }
    , FrameWidth_ { edit->style ()->pixelMetric (QStyle::PM_DefaultFrameWidth) }
    , Pad_ { 1 + FrameWidth_ }
    {
        edit->installEventFilter (this);
 
        const auto markName = "LC.Core.HasLineEditButtonManager";
        if (edit->property (markName).toBool ())
        {
            std::string str { "LineEditButtonManager is already installed on the edit" };
 
            const auto& name = edit->objectName ();
            if (!name.isEmpty ())
                str += " " + name.toStdString ();
 
            throw std::runtime_error (str);
        }
 
        edit->setProperty (markName, true);
    }
 
    void LineEditButtonManager::Add (QToolButton *button)
    {
        Buttons_ << button;
 
        const auto& buttonSH = button->sizeHint ();
        Pad_ += buttonSH.width ();
 
        Edit_->setStyleSheet (QStringLiteral ("QLineEdit { padding-right: %1px; }")
                    .arg (Pad_));
 
        UpdatePos ();
    }
 
    bool LineEditButtonManager::eventFilter (QObject *obj, QEvent *event)
    {
        if (event->type () == QEvent::Resize ||
            event->type () == QEvent::Move)
            UpdatePos ();
 
        return QObject::eventFilter (obj, event);
    }
 
    void LineEditButtonManager::UpdatePos ()
    {
        int sumWidth = 0;
 
        for (const auto button : Buttons_)
        {
            const auto& hint = button->sizeHint ();
 
            sumWidth += hint.width ();
 
            const auto& rect = Edit_->rect ();
            const int frameWidth = Edit_->style ()->pixelMetric (QStyle::PM_DefaultFrameWidth);
            button->move (rect.right () - frameWidth - sumWidth,
                    (rect.bottom () + 1 - hint.height ()) / 2);
        }
    }
}