+/* This file is part of the KDE project
+ Copyright (c) 2007 Casper Boemann <cbr@boemann.dk>
+ Copyright (c) 2010 Jean-Baptiste Mardelle <jb@kdenlive.org>
+
+ This library 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 library 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 library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+#include "KoSliderCombo.h"
+
+#include <QTimer>
+#include <QApplication>
+#include <QSize>
+#include <QSlider>
+#include <QStyle>
+#include <QStylePainter>
+#include <QStyleOptionSlider>
+#include <QLineEdit>
+#include <QValidator>
+#include <QHBoxLayout>
+#include <QFrame>
+#include <QMenu>
+#include <QMouseEvent>
+#include <QDoubleSpinBox>
+#include <QDesktopWidget>
+
+#include <kglobal.h>
+#include <klocale.h>
+#include <kdebug.h>
+
+class KoSliderComboContainer : public QMenu
+{
+public:
+ KoSliderComboContainer(KoSliderCombo *parent) : QMenu(parent ), m_parent(parent) {}
+
+protected:
+ virtual void mousePressEvent(QMouseEvent *e);
+private:
+ KoSliderCombo *m_parent;
+};
+
+void KoSliderComboContainer::mousePressEvent(QMouseEvent *e)
+{
+ QStyleOptionComboBox opt;
+ opt.init(m_parent);
+ opt.subControls = QStyle::SC_All;
+ opt.activeSubControls = QStyle::SC_ComboBoxArrow;
+ QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt,
+ m_parent->mapFromGlobal(e->globalPos()),
+ m_parent);
+ if (sc == QStyle::SC_ComboBoxArrow)
+ setAttribute(Qt::WA_NoMouseReplay);
+ QMenu::mousePressEvent(e);
+}
+
+class KoSliderCombo::KoSliderComboPrivate {
+public:
+ KoSliderCombo *thePublic;
+ QValidator *m_validator;
+ QTimer m_timer;
+ KoSliderComboContainer *container;
+ QSlider *slider;
+ QStyle::StateFlag arrowState;
+ qreal minimum;
+ qreal maximum;
+ int decimals;
+ bool firstShowOfSlider;
+
+ void showPopup();
+ void hidePopup();
+
+ void sliderValueChanged(int value);
+ void sliderReleased();
+ void lineEditFinished();
+};
+
+KoSliderCombo::KoSliderCombo(QWidget *parent)
+ : QComboBox(parent)
+ ,d(new KoSliderComboPrivate())
+{
+ d->thePublic = this;
+ d->minimum = 0.0;
+ d->maximum = 100.0;
+ d->decimals = 2;
+ d->container = new KoSliderComboContainer(this);
+ d->container->setAttribute(Qt::WA_WindowPropagation);
+ QStyleOptionComboBox opt;
+ opt.init(this);
+// d->container->setFrameStyle(style()->styleHint(QStyle::SH_ComboBox_PopupFrameStyle, &opt, this));
+
+ d->slider = new QSlider(Qt::Horizontal);
+ d->slider->setMinimum(0);
+ d->slider->setMaximum(256);
+ d->slider->setPageStep(10);
+ d->slider->setValue(0);
+ // When set to true, causes flicker on Qt 4.6. Any reason to keep it?
+ d->firstShowOfSlider = false; //true;
+
+ QHBoxLayout * l = new QHBoxLayout();
+ l->setMargin(2);
+ l->setSpacing(2);
+ l->addWidget(d->slider);
+ d->container->setLayout(l);
+ d->container->resize(200, 30);
+
+ setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+ setEditable(true);
+ setEditText(KGlobal::locale()->formatNumber(0, d->decimals));
+
+ connect(d->slider, SIGNAL(valueChanged(int)), SLOT(sliderValueChanged(int)));
+ connect(d->slider, SIGNAL(sliderReleased()), SLOT(sliderReleased()));
+ connect(lineEdit(), SIGNAL(editingFinished()), SLOT(lineEditFinished()));
+}
+
+KoSliderCombo::~KoSliderCombo()
+{
+ delete d;
+}
+
+QSize KoSliderCombo::sizeHint() const
+{
+ return minimumSizeHint();
+}
+
+QSize KoSliderCombo::minimumSizeHint() const
+{
+ QSize sh;
+
+ const QFontMetrics &fm = fontMetrics();
+
+ sh.setWidth(5 * fm.width(QLatin1Char('8')));
+ sh.setHeight(qMax(fm.lineSpacing(), 14) + 2);
+
+ // add style and strut values
+ QStyleOptionComboBox opt;
+ opt.init(this);
+ opt.subControls = QStyle::SC_All;
+ opt.editable = true;
+ sh = style()->sizeFromContents(QStyle::CT_ComboBox, &opt, sh, this);
+
+ return sh.expandedTo(QApplication::globalStrut());
+}
+
+void KoSliderCombo::KoSliderComboPrivate::showPopup()
+{
+ if(firstShowOfSlider) {
+ container->show(); //show container a bit early so the slider can be layout'ed
+ firstShowOfSlider = false;
+ }
+
+ QStyleOptionSlider opt;
+ opt.init(slider);
+ opt.maximum=256;
+ opt.sliderPosition = opt.sliderValue = slider->value();
+ int hdlPos = thePublic->style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle).center().x();
+
+ QStyleOptionComboBox optThis;
+ optThis.init(thePublic);
+ optThis.subControls = QStyle::SC_All;
+ optThis.editable = true;
+ int arrowPos = thePublic->style()->subControlRect(QStyle::CC_ComboBox, &optThis, QStyle::SC_ComboBoxArrow).center().x();
+
+ QSize popSize = container->size();
+ QRect popupRect(thePublic->mapToGlobal(QPoint(arrowPos - hdlPos - slider->x(), thePublic->size().height())), popSize);
+
+ // Make sure the popup is not drawn outside the screen area
+ QRect screenRect = QApplication::desktop()->availableGeometry(container);
+ if (popupRect.right() > screenRect.right())
+ popupRect.translate(screenRect.right() - popupRect.right(), 0);
+ if (popupRect.left() < screenRect.left())
+ popupRect.translate(screenRect.left() - popupRect.left(), 0);
+ if (popupRect.bottom() > screenRect.bottom())
+ popupRect.translate(0, -(thePublic->height() + container->height()));
+
+ container->setGeometry(popupRect);
+ container->raise();
+ container->show();
+ slider->setFocus();
+}
+
+void KoSliderCombo::KoSliderComboPrivate::hidePopup()
+{
+ container->hide();
+}
+
+void KoSliderCombo::hideEvent(QHideEvent *)
+{
+ d->hidePopup();
+}
+
+void KoSliderCombo::changeEvent(QEvent *e)
+{
+ switch (e->type())
+ {
+ case QEvent::EnabledChange:
+ if (!isEnabled())
+ d->hidePopup();
+ break;
+ case QEvent::PaletteChange:
+ d->container->setPalette(palette());
+ break;
+ default:
+ break;
+ }
+ QComboBox::changeEvent(e);
+}
+
+void KoSliderCombo::paintEvent(QPaintEvent *)
+{
+ QStylePainter gc(this);
+
+ gc.setPen(palette().color(QPalette::Text));
+
+ QStyleOptionComboBox opt;
+ opt.init(this);
+ opt.subControls = QStyle::SC_All;
+ opt.editable = true;
+ gc.drawComplexControl(QStyle::CC_ComboBox, opt);
+ gc.drawControl(QStyle::CE_ComboBoxLabel, opt);
+}
+
+void KoSliderCombo::mousePressEvent(QMouseEvent *e)
+{
+ QStyleOptionComboBox opt;
+ opt.init(this);
+ opt.subControls = QStyle::SC_All;
+ opt.editable = true;
+ QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ComboBox, &opt, e->pos(),
+ this);
+ if (sc == QStyle::SC_ComboBoxArrow && !d->container->isVisible())
+ {
+ d->showPopup();
+ }
+ else
+ QComboBox::mousePressEvent(e);
+}
+
+void KoSliderCombo::keyPressEvent(QKeyEvent *e)
+{
+ if (e->key() == Qt::Key_Up) setValue(value() + d->slider->singleStep() * maximum() / 256 + 0.5);
+ else if (e->key() == Qt::Key_Down) setValue(value() - d->slider->singleStep() * maximum() / 256 - 0.5);
+ else QComboBox::keyPressEvent(e);
+}
+
+void KoSliderCombo::wheelEvent(QWheelEvent *e)
+{
+ if (e->delta() > 0) setValue(value() + d->slider->singleStep() * maximum() / 256 + 0.5);
+ else setValue(value() - d->slider->singleStep() * maximum() / 256 - 0.5);
+}
+
+void KoSliderCombo::KoSliderComboPrivate::lineEditFinished()
+{
+ qreal value = thePublic->currentText().toDouble();
+ slider->blockSignals(true);
+ slider->setValue(int((value - minimum) * 256 / maximum + 0.5));
+ slider->blockSignals(false);
+ emit thePublic->valueChanged(value, true);
+}
+
+void KoSliderCombo::KoSliderComboPrivate::sliderValueChanged(int slidervalue)
+{
+ thePublic->setEditText(KGlobal::locale()->formatNumber(minimum + maximum*slidervalue/256, decimals));
+
+ qreal value = thePublic->currentText().toDouble();
+ emit thePublic->valueChanged(value, false);
+}
+
+void KoSliderCombo::KoSliderComboPrivate::sliderReleased()
+{
+ qreal value = thePublic->currentText().toDouble();
+ emit thePublic->valueChanged(value, true);
+}
+
+qreal KoSliderCombo::maximum() const
+{
+ return d->maximum;
+}
+
+qreal KoSliderCombo::minimum() const
+{
+ return d->minimum;
+}
+
+qreal KoSliderCombo::decimals() const
+{
+ return d->decimals;
+}
+
+qreal KoSliderCombo::value() const
+{
+ return currentText().toDouble();
+}
+
+void KoSliderCombo::setDecimals(int dec)
+{
+ d->decimals = dec;
+ if (dec == 0) lineEdit()->setValidator(new QIntValidator(this));
+ else lineEdit()->setValidator(new QDoubleValidator(this));
+}
+
+void KoSliderCombo::setMinimum(qreal min)
+{
+ d->minimum = min;
+}
+
+void KoSliderCombo::setMaximum(qreal max)
+{
+ d->maximum = max;
+}
+
+void KoSliderCombo::setValue(qreal value)
+{
+ if(value < d->minimum)
+ value = d->minimum;
+ if(value > d->maximum)
+ value = d->maximum;
+ setEditText(KGlobal::locale()->formatNumber(value, d->decimals));
+ d->slider->blockSignals(true);
+ d->slider->setValue(int((value - d->minimum) * 256 / d->maximum + 0.5));
+ d->slider->blockSignals(false);
+ emit valueChanged(value, true);
+}
+
+#include <KoSliderCombo.moc>