KoDockWidgetTitleBarButton.cpp

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/* This file is part of the KDE project
   SPDX-FileCopyrightText: 2007 Marijn Kruisselbrink <[email protected]>
   SPDX-FileCopyrightText: 2007 Thomas Zander <[email protected]>
 
   SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#include "KoDockWidgetTitleBarButton.h"
 
#include <WidgetsDebug.h>
 
#include <QAbstractButton>
#include <QAction>
#include <QLabel>
#include <QLayout>
#include <QStyle>
#include <QStylePainter>
#include <QStyleOptionFrame>
 
class Q_DECL_HIDDEN KoDockWidgetTitleBarButton::Private
{
public:
    Private() : styleSize(0, 0), iconSize(0) {}
    QSize styleSize;
    int iconSize;
};
 
KoDockWidgetTitleBarButton::KoDockWidgetTitleBarButton(QWidget *parent)
        : QAbstractButton(parent), d(new Private())
{
    setFocusPolicy(Qt::NoFocus);
}
 
KoDockWidgetTitleBarButton::~KoDockWidgetTitleBarButton()
{
    delete d;
}
 
QSize KoDockWidgetTitleBarButton::sizeHint() const
{
    ensurePolished();
 
    const int margin = style()->pixelMetric(QStyle::PM_DockWidgetTitleBarButtonMargin, 0, this);
    if (icon().isNull()) {
        return QSize(18, 18);
    }
 
    int iconSize = style()->pixelMetric(QStyle::PM_SmallIconSize, 0, this);
    if (iconSize != d->iconSize) {
        const_cast<KoDockWidgetTitleBarButton*>(this)->d->iconSize = iconSize;
        const QPixmap pm = icon().pixmap(iconSize);
        const_cast<KoDockWidgetTitleBarButton*>(this)->d->styleSize = QSize(pm.width() + margin, pm.height() + margin);
    }
    return d->styleSize;
}
 
QSize KoDockWidgetTitleBarButton::minimumSizeHint() const
{
    return sizeHint();
}
 
// redraw the button when the mouse enters or leaves it
void KoDockWidgetTitleBarButton::enterEvent(QEvent *event)
{
    if (isEnabled())
        update();
    QAbstractButton::enterEvent(event);
}
 
void KoDockWidgetTitleBarButton::leaveEvent(QEvent *event)
{
    if (isEnabled())
        update();
    QAbstractButton::leaveEvent(event);
}
 
void KoDockWidgetTitleBarButton::paintEvent(QPaintEvent *)
{
    QPainter p(this);
 
    QStyleOptionToolButton opt;
    opt.initFrom(this);
    opt.state |= QStyle::State_AutoRaise;
 
    if (isEnabled() && underMouse() && !isChecked() && !isDown())
        opt.state |= QStyle::State_Raised;
    if (isChecked())
        opt.state |= QStyle::State_On;
    if (isDown())
        opt.state |= QStyle::State_Sunken;
    style()->drawPrimitive(QStyle::PE_PanelButtonTool, &opt, &p, this);
 
    opt.icon = icon();
    opt.subControls = 0;
    opt.activeSubControls = 0;
    opt.features = QStyleOptionToolButton::None;
    opt.arrowType = Qt::NoArrow;
    int size = style()->pixelMetric(QStyle::PM_SmallIconSize, 0, this);
    opt.iconSize = QSize(size, size);
    style()->drawComplexControl(QStyle::CC_ToolButton, &opt, &p, this);
}