149 lines
4.0 KiB
C++
149 lines
4.0 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2017 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "selectorlabel.h"
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#include "support/osxstyle.h"
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#include "support/utils.h"
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#include <QAction>
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#include <QEvent>
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#include <QMouseEvent>
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SelectorLabel::SelectorLabel(QWidget *p)
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: QLabel(p)
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, current(0)
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, useArrow(false)
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, menu(0)
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{
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setAttribute(Qt::WA_Hover, true);
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menu=new QMenu(this);
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#ifdef Q_OS_MAC
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// Mac text seems to be 2px too high. margin-top fixes this
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setStyleSheet(QString("QLabel { margin-top: 2px} QLabel:hover {color:%1;}").arg(OSXStyle::self()->viewPalette().highlight().color().name()));
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#else
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setStyleSheet(QLatin1String("QLabel:hover {color:palette(highlight);}"));
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#endif
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//setMargin(Utils::scaleForDpi(2));
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}
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static QString addMarkup(const QString &s, bool arrow)
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{
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return QLatin1String("<b>")+s+(arrow ? QLatin1String(" ")+QChar(0x25BE) : QString())+QLatin1String("</b>");
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}
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void SelectorLabel::addItem(const QString &text, const QString &data, const QString &tt)
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{
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QAction *act=menu->addAction(text, this, SLOT(itemSelected()));
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act->setData(data);
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if (!tt.isEmpty()) {
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act->setToolTip(tt);
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}
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setText(addMarkup(text, useArrow));
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current=menu->actions().count();
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}
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void SelectorLabel::itemSelected()
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{
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QAction *act=qobject_cast<QAction *>(sender());
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if (act) {
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setCurrentIndex(menu->actions().indexOf(act));
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}
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}
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bool SelectorLabel::event(QEvent *e)
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{
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if (!menu) {
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return QLabel::event(e);
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}
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QList<QAction *> actions=menu->actions();
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switch (e->type()) {
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case QEvent::MouseButtonPress:
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if (Qt::NoModifier==static_cast<QMouseEvent *>(e)->modifiers() && Qt::LeftButton==static_cast<QMouseEvent *>(e)->button()) {
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menu->exec(mapToGlobal(QPoint(0, 0)));
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update();
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}
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break;
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case QEvent::Wheel: {
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int numDegrees = static_cast<QWheelEvent *>(e)->delta() / 8;
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int numSteps = numDegrees / 15;
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int newIndex = current;
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if (numSteps > 0) {
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for (int i = 0; i < numSteps; ++i) {
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newIndex++;
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if (newIndex>=actions.count()) {
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newIndex=0;
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}
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}
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} else {
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for (int i = 0; i > numSteps; --i) {
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newIndex--;
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if (newIndex<0) {
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newIndex=actions.count()-1;
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}
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}
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}
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setCurrentIndex(newIndex);
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break;
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}
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default:
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break;
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}
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return QLabel::event(e);
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}
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void SelectorLabel::setCurrentIndex(int v)
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{
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if (!menu || v<0 || v==current) {
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return;
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}
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QList<QAction *> actions=menu->actions();
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if (v>=actions.count()) {
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return;
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}
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current=v;
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setText(addMarkup(Utils::strippedText(actions.at(current)->text()), useArrow));
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emit activated(current);
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}
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QString SelectorLabel::itemData(int index) const
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{
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QAction *act=action(index);
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return act ? act->data().toString() : QString();
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}
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QAction * SelectorLabel::action(int index) const
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{
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if (!menu) {
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return 0;
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}
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QList<QAction *> actions=menu->actions();
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if (index>=actions.count()) {
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return 0;
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}
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return actions.at(index);
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}
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