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/*
* KMix -- KDE's full featured mini mixer
*
* Copyright (C) 2018 Jonathan Marten <jjm@keelhaul.me.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, see
* <https://www.gnu.org/licenses>.
*/
#include "toggletoolbutton.h"
#include <qicon.h>
#include <qlabel.h>
#include <qiconengine.h>
#include <qstyle.h>
#include <kmix_debug.h>
static const int iconSmallSize = 10;
class DisabledIconEngine : public QIconEngine
{
QIcon m_icon;
public:
DisabledIconEngine(const QIcon &icon) : QIconEngine(), m_icon(icon) {}
~DisabledIconEngine() override {}
QIconEngine *clone() const override
{
return new DisabledIconEngine(m_icon);
}
void paint(QPainter *painter, const QRect &rect, QIcon::Mode, QIcon::State state) override
{
return m_icon.paint(painter, rect, Qt::AlignCenter, QIcon::Disabled, state);
}
QPixmap pixmap(const QSize &size, QIcon::Mode, QIcon::State state) override
{
return m_icon.pixmap(size, QIcon::Disabled, state);
}
QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state) override
{
return m_icon.actualSize(size, mode, state);
}
QList<QSize> availableSizes(QIcon::Mode mode, QIcon::State state) const override
{
return m_icon.availableSizes(mode, state);
}
};
ToggleToolButton::ToggleToolButton(const QString &activeIconName, QWidget *pnt)
: QToolButton(pnt)
{
mActiveLoaded = mInactiveLoaded = false;
mActiveIconName = activeIconName;
mSmallSize = false;
mIsActive = true;
mFirstTime = true;
setCheckable(false);
setAutoRaise(true);
}
void ToggleToolButton::setActive(bool active)
{
if (!mFirstTime && (active==mIsActive)) return; // no change required
mIsActive = active; // record required state
mFirstTime = false; // note now initialised
QIcon icon; // new icon to set
if (mIsActive) // look at new state
{
if (mActiveIcon.isNull()) // need icon for active state
{ // only if not already tried
if (!mActiveLoaded) mActiveIcon = QIcon::fromTheme(mActiveIconName);
mActiveLoaded = true; // note not to try again
}
icon = mActiveIcon; // the icon to use
}
else // want inactive state
{
if (mInactiveIcon.isNull()) // need icon for inactive state
{
if (!mInactiveIconName.isEmpty()) // inactive icon is set
{
if (!mInactiveLoaded) mInactiveIcon = QIcon::fromTheme(mInactiveIconName);
}
else
{ // need to derive from active state
if (!mActiveLoaded) mActiveIcon = QIcon::fromTheme(mActiveIconName);
mActiveLoaded = true; // only if not already tried
if (mActiveIcon.isNull()) qCWarning(KMIX_LOG) << "want inactive but no active available";
else
{
mInactiveIcon = QIcon(new DisabledIconEngine(mActiveIcon));
}
}
mInactiveLoaded = true; // note not to try again
}
icon = mInactiveIcon; // the icon to use
}
if (icon.isNull()) return; // icon not available
setIcon(icon); // set button icon
}
/**
* Loads the icon with the given @p iconName
* and applies it to the @p label widget. The widget must be either a
* QLabel or a QToolButton.
*
* Originally @c MDWSlider::setIcon(), moved here because it uses the same
* icon size parameters as a @c ToggleToolButton, and it can share @c getPixmap().
*/
void ToggleToolButton::setIndicatorIcon(const QString &iconName, QWidget *label, bool small)
{
const auto icon = QIcon::fromTheme(iconName);
if (icon.isNull())
{
qCWarning(KMIX_LOG) << "Could not get icon for" << iconName;
return;
}
QSize iconSize;
if (small) // small size, set for scaled icon
{
iconSize = QSize(iconSmallSize, iconSmallSize);
}
else // not small size, set for normal icon
{
const auto toolBarIconSize = label->style()->pixelMetric(QStyle::PM_TabBarIconSize, nullptr, label);
iconSize = QSize(toolBarIconSize, toolBarIconSize);
}
label->resize(iconSize);
label->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
QLabel *lbl = qobject_cast<QLabel *>(label);
if (lbl!=nullptr)
{
lbl->setPixmap(icon.pixmap(iconSize));
lbl->setAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
}
else
{
QToolButton *tbt = qobject_cast<QToolButton *>(label);
if (tbt!=nullptr) tbt->setIcon(icon);
}
}
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