qxtletterboxwidget.cpp

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/****************************************************************************
 **
 ** Copyright (C) Qxt Foundation. Some rights reserved.
 **
 ** This file is part of the QxtGui module of the Qxt library.
 **
 ** This library is free software; you can redistribute it and/or modify it
 ** under the terms of the Common Public License, version 1.0, as published
 ** by IBM, and/or under the terms of the GNU Lesser General Public License,
 ** version 2.1, as published by the Free Software Foundation.
 **
 ** This file is provided "AS IS", without WARRANTIES OR CONDITIONS OF ANY
 ** KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
 ** WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY OR
 ** FITNESS FOR A PARTICULAR PURPOSE.
 **
 ** You should have received a copy of the CPL and the LGPL along with this
 ** file. See the LICENSE file and the cpl1.0.txt/lgpl-2.1.txt files
 ** included with the source distribution for more information.
 ** If you did not receive a copy of the licenses, contact the Qxt Foundation.
 **
 ** <http://libqxt.org>  <foundation@libqxt.org>
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 ****************************************************************************/
#include "qxtletterboxwidget.h"
#include "qxtletterboxwidget_p.h"
#include <QLayout>
#include <QStyle>

QxtLetterBoxWidgetPrivate::QxtLetterBoxWidgetPrivate() : center(0), timer(), margin(0)
{
    timer.setSingleShot(true);
}

QxtLetterBoxWidget::QxtLetterBoxWidget(QWidget* parent) : QFrame(parent)
{
    QXT_INIT_PRIVATE(QxtLetterBoxWidget);
    connect(&qxt_d().timer, SIGNAL(timeout()), this, SLOT(resizeWidget()));
}

QxtLetterBoxWidget::~QxtLetterBoxWidget()
{
}

QColor QxtLetterBoxWidget::backgroundColor() const
{
    return palette().color(QPalette::Window);
}

void QxtLetterBoxWidget::setBackgroundColor(const QColor& color)
{
    QPalette pal = palette();
    pal.setColor(QPalette::Window, color);
    setPalette(pal);
    setAutoFillBackground(true);
}

void QxtLetterBoxWidget::clearBackgroundColor()
{
    setBackgroundColor(QColor());
    setAutoFillBackground(false);
}

int QxtLetterBoxWidget::margin() const
{
    return qxt_d().margin;
}

void QxtLetterBoxWidget::setMargin(int margin)
{
    if (qxt_d().margin != margin)
    {
        qxt_d().margin = margin;
        resizeWidget();
    }
}

QWidget* QxtLetterBoxWidget::widget() const
{
    return qxt_d().center;
}

void QxtLetterBoxWidget::setWidget(QWidget* widget)
{
    if (qxt_d().center && qxt_d().center != widget)
        qxt_d().center->deleteLater();
    qxt_d().center = widget;
    if (widget)
    {
        widget->setParent(this);
        resizeWidget();
    }
}

uint QxtLetterBoxWidget::resizeDelay() const
{
    return qxt_d().timer.interval();
}

void QxtLetterBoxWidget::setResizeDelay(uint delay)
{
    qxt_d().timer.setInterval(delay);
}

void QxtLetterBoxWidget::resizeWidget()
{
    if (qxt_d().center)
    {
        QSize s = qxt_d().center->sizeIncrement();
        s.scale(size(), Qt::KeepAspectRatio);
        s -= QSize(2 * qxt_d().margin, 2 * qxt_d().margin);
        s = QLayout::closestAcceptableSize(qxt_d().center, s);
        QRect r = QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter, s, rect());
        qxt_d().center->setGeometry(r);
    }
}

void QxtLetterBoxWidget::resizeEvent(QResizeEvent* event)
{
    QFrame::resizeEvent(event);
    if (resizeDelay() > 0)
        qxt_d().timer.start();
    else
        resizeWidget();
}