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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 378 insertions, 0 deletions

diff --git a/src/gui/styles/qstylehelper.cpp b/src/gui/styles/qstylehelper.cpp
new file mode 100644
index 0000000000..59766cae0f
--- /dev/null
+++ b/src/gui/styles/qstylehelper.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qstyleoption.h>
+#include <qpainter.h>
+#include <qpixmapcache.h>
+#include <private/qmath_p.h>
+#include <private/qstyle_p.h>
+#include <qmath.h>
+
+#if defined(Q_WS_WIN)
+#include "qt_windows.h"
+#elif defined(Q_WS_MAC)
+#include <private/qt_cocoa_helpers_mac_p.h>
+#endif
+
+#include "qstylehelper_p.h"
+#include <qstringbuilder.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QStyleHelper {
+
+QString uniqueName(const QString &key, const QStyleOption *option, const QSize &size)
+{
+    const QStyleOptionComplex *complexOption = qstyleoption_cast<const QStyleOptionComplex *>(option);
+    QString tmp = key % HexString<uint>(option->state)
+                      % HexString<uint>(option->direction)
+                      % HexString<uint>(complexOption ? uint(complexOption->activeSubControls) : 0u)
+                      % HexString<quint64>(option->palette.cacheKey())
+                      % HexString<uint>(size.width())
+                      % HexString<uint>(size.height());
+
+#ifndef QT_NO_SPINBOX
+    if (const QStyleOptionSpinBox *spinBox = qstyleoption_cast<const QStyleOptionSpinBox *>(option)) {
+        tmp = tmp % HexString<uint>(spinBox->buttonSymbols)
+                  % HexString<uint>(spinBox->stepEnabled)
+                  % QLatin1Char(spinBox->frame ? '1' : '0'); ;
+    }
+#endif // QT_NO_SPINBOX
+    return tmp;
+}
+
+qreal dpiScaled(qreal value)
+{
+    static qreal scale = -1;
+    if (scale < 0) {
+        scale = 1.0;
+#if defined(Q_WS_WIN)
+        {
+            HDC hdcScreen = GetDC(0);
+            int dpi = GetDeviceCaps(hdcScreen, LOGPIXELSX);
+            ReleaseDC(0, hdcScreen);
+            scale = dpi/96.0;
+        }
+#elif defined(Q_WS_MAC)
+    scale = qt_mac_get_scalefactor();
+#endif
+    }
+    return value * scale;
+}
+
+
+#ifndef QT_NO_DIAL
+
+int calcBigLineSize(int radius)
+{
+    int bigLineSize = radius / 6;
+    if (bigLineSize < 4)
+        bigLineSize = 4;
+    if (bigLineSize > radius / 2)
+        bigLineSize = radius / 2;
+    return bigLineSize;
+}
+
+static QPointF calcRadialPos(const QStyleOptionSlider *dial, qreal offset)
+{
+    const int width = dial->rect.width();
+    const int height = dial->rect.height();
+    const int r = qMin(width, height) / 2;
+    const int currentSliderPosition = dial->upsideDown ? dial->sliderPosition : (dial->maximum - dial->sliderPosition);
+    qreal a = 0;
+    if (dial->maximum == dial->minimum)
+        a = Q_PI / 2;
+    else if (dial->dialWrapping)
+        a = Q_PI * 3 / 2 - (currentSliderPosition - dial->minimum) * 2 * Q_PI
+            / (dial->maximum - dial->minimum);
+    else
+        a = (Q_PI * 8 - (currentSliderPosition - dial->minimum) * 10 * Q_PI
+            / (dial->maximum - dial->minimum)) / 6;
+    qreal xc = width / 2.0;
+    qreal yc = height / 2.0;
+    qreal len = r - QStyleHelper::calcBigLineSize(r) - 3;
+    qreal back = offset * len;
+    QPointF pos(QPointF(xc + back * qCos(a), yc - back * qSin(a)));
+    return pos;
+}
+
+qreal angle(const QPointF &p1, const QPointF &p2)
+{
+    static const qreal rad_factor = 180 / Q_PI;
+    qreal _angle = 0;
+
+    if (p1.x() == p2.x()) {
+        if (p1.y() < p2.y())
+            _angle = 270;
+        else
+            _angle = 90;
+    } else  {
+        qreal x1, x2, y1, y2;
+
+        if (p1.x() <= p2.x()) {
+            x1 = p1.x(); y1 = p1.y();
+            x2 = p2.x(); y2 = p2.y();
+        } else {
+            x2 = p1.x(); y2 = p1.y();
+            x1 = p2.x(); y1 = p2.y();
+        }
+
+        qreal m = -(y2 - y1) / (x2 - x1);
+        _angle = qAtan(m) *  rad_factor;
+
+        if (p1.x() < p2.x())
+            _angle = 180 - _angle;
+        else
+            _angle = -_angle;
+    }
+    return _angle;
+}
+
+QPolygonF calcLines(const QStyleOptionSlider *dial)
+{
+    QPolygonF poly;
+    int width = dial->rect.width();
+    int height = dial->rect.height();
+    qreal r = qMin(width, height) / 2;
+    int bigLineSize = calcBigLineSize(int(r));
+
+    qreal xc = width / 2 + 0.5;
+    qreal yc = height / 2 + 0.5;
+    int ns = dial->tickInterval;
+    int notches = (dial->maximum + ns - 1 - dial->minimum) / ns;
+    if (notches <= 0)
+        return poly;
+    if (dial->maximum < dial->minimum || dial->maximum - dial->minimum > 1000) {
+        int maximum = dial->minimum + 1000;
+        notches = (maximum + ns - 1 - dial->minimum) / ns;
+    }
+
+    poly.resize(2 + 2 * notches);
+    int smallLineSize = bigLineSize / 2;
+    for (int i = 0; i <= notches; ++i) {
+        qreal angle = dial->dialWrapping ? Q_PI * 3 / 2 - i * 2 * Q_PI / notches
+                  : (Q_PI * 8 - i * 10 * Q_PI / notches) / 6;
+        qreal s = qSin(angle);
+        qreal c = qCos(angle);
+        if (i == 0 || (((ns * i) % (dial->pageStep ? dial->pageStep : 1)) == 0)) {
+            poly[2 * i] = QPointF(xc + (r - bigLineSize) * c,
+                                  yc - (r - bigLineSize) * s);
+            poly[2 * i + 1] = QPointF(xc + r * c, yc - r * s);
+        } else {
+            poly[2 * i] = QPointF(xc + (r - 1 - smallLineSize) * c,
+                                  yc - (r - 1 - smallLineSize) * s);
+            poly[2 * i + 1] = QPointF(xc + (r - 1) * c, yc -(r - 1) * s);
+        }
+    }
+    return poly;
+}
+
+// This will draw a nice and shiny QDial for us. We don't want
+// all the shinyness in QWindowsStyle, hence we place it here
+
+void drawDial(const QStyleOptionSlider *option, QPainter *painter)
+{
+    QPalette pal = option->palette;
+    QColor buttonColor = pal.button().color();
+    const int width = option->rect.width();
+    const int height = option->rect.height();
+    const bool enabled = option->state & QStyle::State_Enabled;
+    qreal r = qMin(width, height) / 2;
+    r -= r/50;
+    const qreal penSize = r/20.0;
+
+    painter->save();
+    painter->setRenderHint(QPainter::Antialiasing);
+
+    // Draw notches
+    if (option->subControls & QStyle::SC_DialTickmarks) {
+        painter->setPen(option->palette.dark().color().darker(120));
+        painter->drawLines(QStyleHelper::calcLines(option));
+    }
+
+    // Cache dial background
+    BEGIN_STYLE_PIXMAPCACHE(QString::fromLatin1("qdial"));
+    p->setRenderHint(QPainter::Antialiasing);
+
+    const qreal d_ = r / 6;
+    const qreal dx = option->rect.x() + d_ + (width - 2 * r) / 2 + 1;
+    const qreal dy = option->rect.y() + d_ + (height - 2 * r) / 2 + 1;
+
+    QRectF br = QRectF(dx + 0.5, dy + 0.5,
+                       int(r * 2 - 2 * d_ - 2),
+                       int(r * 2 - 2 * d_ - 2));
+    buttonColor.setHsv(buttonColor .hue(),
+                       qMin(140, buttonColor .saturation()),
+                       qMax(180, buttonColor.value()));
+    QColor shadowColor(0, 0, 0, 20);
+
+    if (enabled) {
+        // Drop shadow
+        qreal shadowSize = qMax(1.0, penSize/2.0);
+        QRectF shadowRect= br.adjusted(-2*shadowSize, -2*shadowSize,
+                                       2*shadowSize, 2*shadowSize);
+        QRadialGradient shadowGradient(shadowRect.center().x(),
+                                       shadowRect.center().y(), shadowRect.width()/2.0,
+                                       shadowRect.center().x(), shadowRect.center().y());
+        shadowGradient.setColorAt(qreal(0.91), QColor(0, 0, 0, 40));
+        shadowGradient.setColorAt(qreal(1.0), Qt::transparent);
+        p->setBrush(shadowGradient);
+        p->setPen(Qt::NoPen);
+        p->translate(shadowSize, shadowSize);
+        p->drawEllipse(shadowRect);
+        p->translate(-shadowSize, -shadowSize);
+
+        // Main gradient
+        QRadialGradient gradient(br.center().x() - br.width()/3, dy,
+                                 br.width()*1.3, br.center().x(),
+                                 br.center().y() - br.height()/2);
+        gradient.setColorAt(0, buttonColor.lighter(110));
+        gradient.setColorAt(qreal(0.5), buttonColor);
+        gradient.setColorAt(qreal(0.501), buttonColor.darker(102));
+        gradient.setColorAt(1, buttonColor.darker(115));
+        p->setBrush(gradient);
+    } else {
+        p->setBrush(Qt::NoBrush);
+    }
+
+    p->setPen(QPen(buttonColor.darker(280)));
+    p->drawEllipse(br);
+    p->setBrush(Qt::NoBrush);
+    p->setPen(buttonColor.lighter(110));
+    p->drawEllipse(br.adjusted(1, 1, -1, -1));
+
+    if (option->state & QStyle::State_HasFocus) {
+        QColor highlight = pal.highlight().color();
+        highlight.setHsv(highlight.hue(),
+                         qMin(160, highlight.saturation()),
+                         qMax(230, highlight.value()));
+        highlight.setAlpha(127);
+        p->setPen(QPen(highlight, 2.0));
+        p->setBrush(Qt::NoBrush);
+        p->drawEllipse(br.adjusted(-1, -1, 1, 1));
+    }
+
+    END_STYLE_PIXMAPCACHE
+
+    QPointF dp = calcRadialPos(option, qreal(0.70));
+    buttonColor = buttonColor.lighter(104);
+    buttonColor.setAlphaF(qreal(0.8));
+    const qreal ds = r/qreal(7.0);
+    QRectF dialRect(dp.x() - ds, dp.y() - ds, 2*ds, 2*ds);
+    QRadialGradient dialGradient(dialRect.center().x() + dialRect.width()/2,
+                                 dialRect.center().y() + dialRect.width(),
+                                 dialRect.width()*2,
+                                 dialRect.center().x(), dialRect.center().y());
+    dialGradient.setColorAt(1, buttonColor.darker(140));
+    dialGradient.setColorAt(qreal(0.4), buttonColor.darker(120));
+    dialGradient.setColorAt(0, buttonColor.darker(110));
+    if (penSize > 3.0) {
+        painter->setPen(QPen(QColor(0, 0, 0, 25), penSize));
+        painter->drawLine(calcRadialPos(option, qreal(0.90)), calcRadialPos(option, qreal(0.96)));
+    }
+
+    painter->setBrush(dialGradient);
+    painter->setPen(QColor(255, 255, 255, 150));
+    painter->drawEllipse(dialRect.adjusted(-1, -1, 1, 1));
+    painter->setPen(QColor(0, 0, 0, 80));
+    painter->drawEllipse(dialRect);
+    painter->restore();
+}
+#endif //QT_NO_DIAL
+
+void drawBorderPixmap(const QPixmap &pixmap, QPainter *painter, const QRect &rect,
+                     int left, int top, int right,
+                     int bottom)
+{
+    QSize size = pixmap.size();
+    //painter->setRenderHint(QPainter::SmoothPixmapTransform);
+
+    //top
+    if (top > 0) {
+        painter->drawPixmap(QRect(rect.left() + left, rect.top(), rect.width() -right - left, top), pixmap,
+                            QRect(left, 0, size.width() -right - left, top));
+
+        //top-left
+        if(left > 0)
+            painter->drawPixmap(QRect(rect.left(), rect.top(), left, top), pixmap,
+                                QRect(0, 0, left, top));
+
+        //top-right
+        if (right > 0)
+            painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top(), right, top), pixmap,
+                                QRect(size.width() - right, 0, right, top));
+    }
+
+    //left
+    if (left > 0)
+        painter->drawPixmap(QRect(rect.left(), rect.top()+top, left, rect.height() - top - bottom), pixmap,
+                            QRect(0, top, left, size.height() - bottom - top));
+
+    //center
+    painter->drawPixmap(QRect(rect.left() + left, rect.top()+top, rect.width() -right - left,
+                             rect.height() - bottom - top), pixmap,
+                       QRect(left, top, size.width() -right -left,
+                             size.height() - bottom - top));
+    //right
+    if (right > 0)
+        painter->drawPixmap(QRect(rect.left() +rect.width() - right, rect.top()+top, right, rect.height() - top - bottom), pixmap,
+                            QRect(size.width() - right, top, right, size.height() - bottom - top));
+
+    //bottom
+    if (bottom > 0) {
+        painter->drawPixmap(QRect(rect.left() +left, rect.top() + rect.height() - bottom,
+                                 rect.width() - right - left, bottom), pixmap,
+                            QRect(left, size.height() - bottom,
+                                 size.width() - right - left, bottom));
+        //bottom-left
+        if (left > 0)
+            painter->drawPixmap(QRect(rect.left(), rect.top() + rect.height() - bottom, left, bottom), pixmap,
+                                QRect(0, size.height() - bottom, left, bottom));
+
+        //bottom-right
+        if (right > 0)
+            painter->drawPixmap(QRect(rect.left() + rect.width() - right, rect.top() + rect.height() - bottom, right, bottom), pixmap,
+                                QRect(size.width() - right, size.height() - bottom, right, bottom));
+
+    }
+}
+}
+QT_END_NAMESPACE