Qt Documentation

norwegianwoodstyle.cpp Example File

widgets/styles/norwegianwoodstyle.cpp
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#include <QtGui>
#include "norwegianwoodstyle.h"
void NorwegianWoodStyle::polish(QPalette  &palette)
{
 QColor  brown(212, 140, 95);
 QColor  beige(236, 182, 120);
 QColor  slightlyOpaqueBlack(0, 0, 0, 63);
 QPixmap  backgroundImage(":/images/woodbackground.png");
 QPixmap  buttonImage(":/images/woodbutton.png");
 QPixmap  midImage = buttonImage;
 QPainter  painter;
 painter.begin(&midImage);
 painter.setPen(Qt ::NoPen);
 painter.fillRect(midImage.rect(), slightlyOpaqueBlack);
 painter.end();
 palette = QPalette (brown);
 palette.setBrush(QPalette ::BrightText, Qt ::white);
 palette.setBrush(QPalette ::Base, beige);
 palette.setBrush(QPalette ::Highlight, Qt ::darkGreen);
 setTexture(palette, QPalette ::Button, buttonImage);
 setTexture(palette, QPalette ::Mid, midImage);
 setTexture(palette, QPalette ::Window, backgroundImage);
 QBrush  brush = palette.background();
 brush.setColor(brush.color().dark());
 palette.setBrush(QPalette ::Disabled, QPalette ::WindowText, brush);
 palette.setBrush(QPalette ::Disabled, QPalette ::Text, brush);
 palette.setBrush(QPalette ::Disabled, QPalette ::ButtonText, brush);
 palette.setBrush(QPalette ::Disabled, QPalette ::Base, brush);
 palette.setBrush(QPalette ::Disabled, QPalette ::Button, brush);
 palette.setBrush(QPalette ::Disabled, QPalette ::Mid, brush);
}
void NorwegianWoodStyle::polish(QWidget  *widget)
{
 if (qobject_cast<QPushButton  *>(widget)
 || qobject_cast<QComboBox  *>(widget))
 widget->setAttribute(Qt ::WA_Hover, true);
}
void NorwegianWoodStyle::unpolish(QWidget  *widget)
{
 if (qobject_cast<QPushButton  *>(widget)
 || qobject_cast<QComboBox  *>(widget))
 widget->setAttribute(Qt ::WA_Hover, false);
}
int NorwegianWoodStyle::pixelMetric(PixelMetric metric,
 const QStyleOption  *option,
 const QWidget  *widget) const
{
 switch (metric) {
 case PM_ComboBoxFrameWidth:
 return 8;
 case PM_ScrollBarExtent:
 return QMotifStyle ::pixelMetric(metric, option, widget) + 4;
 default:
 return QMotifStyle ::pixelMetric(metric, option, widget);
 }
}
int NorwegianWoodStyle::styleHint(StyleHint hint, const QStyleOption  *option,
 const QWidget  *widget,
 QStyleHintReturn  *returnData) const
{
 switch (hint) {
 case SH_DitherDisabledText:
 return int(false);
 case SH_EtchDisabledText:
 return int(true);
 default:
 return QMotifStyle ::styleHint(hint, option, widget, returnData);
 }
}
void NorwegianWoodStyle::drawPrimitive(PrimitiveElement element,
 const QStyleOption  *option,
 QPainter  *painter,
 const QWidget  *widget) const
{
 switch (element) {
 case PE_PanelButtonCommand:
 {
 int delta = (option->state & State_MouseOver) ? 64 : 0;
 QColor  slightlyOpaqueBlack(0, 0, 0, 63);
 QColor  semiTransparentWhite(255, 255, 255, 127 + delta);
 QColor  semiTransparentBlack(0, 0, 0, 127 - delta);
 int x, y, width, height;
 option->rect.getRect(&x, &y, &width, &height);
 QPainterPath  roundRect = roundRectPath(option->rect);
 int radius = qMin(width, height) / 2;
 QBrush  brush;
 bool darker;
 const QStyleOptionButton  *buttonOption =
 qstyleoption_cast<const QStyleOptionButton  *>(option);
 if (buttonOption
 && (buttonOption->features & QStyleOptionButton ::Flat)) {
 brush = option->palette.background();
 darker = (option->state & (State_Sunken | State_On));
 } else {
 if (option->state & (State_Sunken | State_On)) {
 brush = option->palette.mid();
 darker = !(option->state & State_Sunken);
 } else {
 brush = option->palette.button();
 darker = false;
 }
 }
 painter->save();
 painter->setRenderHint(QPainter ::Antialiasing, true);
 painter->fillPath(roundRect, brush);
 if (darker)
 painter->fillPath(roundRect, slightlyOpaqueBlack);
 int penWidth;
 if (radius < 10)
 penWidth = 3;
 else if (radius < 20)
 penWidth = 5;
 else
 penWidth = 7;
 QPen  topPen(semiTransparentWhite, penWidth);
 QPen  bottomPen(semiTransparentBlack, penWidth);
 if (option->state & (State_Sunken | State_On))
 qSwap(topPen, bottomPen);
 int x1 = x;
 int x2 = x + radius;
 int x3 = x + width - radius;
 int x4 = x + width;
 if (option->direction == Qt ::RightToLeft) {
 qSwap(x1, x4);
 qSwap(x2, x3);
 }
 QPolygon  topHalf;
 topHalf << QPoint (x1, y)
 << QPoint (x4, y)
 << QPoint (x3, y + radius)
 << QPoint (x2, y + height - radius)
 << QPoint (x1, y + height);
 painter->setClipPath(roundRect);
 painter->setClipRegion(topHalf, Qt ::IntersectClip);
 painter->setPen(topPen);
 painter->drawPath(roundRect);
 QPolygon  bottomHalf = topHalf;
 bottomHalf[0] = QPoint (x4, y + height);
 painter->setClipPath(roundRect);
 painter->setClipRegion(bottomHalf, Qt ::IntersectClip);
 painter->setPen(bottomPen);
 painter->drawPath(roundRect);
 painter->setPen(option->palette.foreground().color());
 painter->setClipping(false);
 painter->drawPath(roundRect);
 painter->restore();
 }
 break;
 default:
 QMotifStyle ::drawPrimitive(element, option, painter, widget);
 }
}
void NorwegianWoodStyle::drawControl(ControlElement element,
 const QStyleOption  *option,
 QPainter  *painter,
 const QWidget  *widget) const
{
 switch (element) {
 case CE_PushButtonLabel:
 {
 QStyleOptionButton  myButtonOption;
 const QStyleOptionButton  *buttonOption =
 qstyleoption_cast<const QStyleOptionButton  *>(option);
 if (buttonOption) {
 myButtonOption = *buttonOption;
 if (myButtonOption.palette.currentColorGroup()
 != QPalette ::Disabled) {
 if (myButtonOption.state & (State_Sunken | State_On)) {
 myButtonOption.palette.setBrush(QPalette ::ButtonText,
 myButtonOption.palette.brightText());
 }
 }
 }
 QMotifStyle ::drawControl(element, &myButtonOption, painter, widget);
 }
 break;
 default:
 QMotifStyle ::drawControl(element, option, painter, widget);
 }
}
void NorwegianWoodStyle::setTexture(QPalette  &palette, QPalette ::ColorRole role,
 const QPixmap  &pixmap)
{
 for (int i = 0; i < QPalette ::NColorGroups; ++i) {
 QColor  color = palette.brush(QPalette ::ColorGroup(i), role).color();
 palette.setBrush(QPalette ::ColorGroup(i), role, QBrush (color, pixmap));
 }
}
QPainterPath  NorwegianWoodStyle::roundRectPath(const QRect  &rect)
{
 int radius = qMin(rect.width(), rect.height()) / 2;
 int diam = 2 * radius;
 int x1, y1, x2, y2;
 rect.getCoords(&x1, &y1, &x2, &y2);
 QPainterPath  path;
 path.moveTo(x2, y1 + radius);
 path.arcTo(QRect (x2 - diam, y1, diam, diam), 0.0, +90.0);
 path.lineTo(x1 + radius, y1);
 path.arcTo(QRect (x1, y1, diam, diam), 90.0, +90.0);
 path.lineTo(x1, y2 - radius);
 path.arcTo(QRect (x1, y2 - diam, diam, diam), 180.0, +90.0);
 path.lineTo(x1 + radius, y2);
 path.arcTo(QRect (x2 - diam, y2 - diam, diam, diam), 270.0, +90.0);
 path.closeSubpath();
 return path;
}

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