Qt:Документация 4.3.2/demos-gradients-gradients-h
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[править] gradients.h Example File
demos/gradients/gradients.h
/**************************************************************************** ** ** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the demonstration applications of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/ ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.0, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** In addition, as a special exception, Trolltech, as the sole copyright ** holder for Qt Designer, grants users of the Qt/Eclipse Integration ** plug-in the right for the Qt/Eclipse Integration to link to ** functionality provided by Qt Designer and its related libraries. ** ** Trolltech reserves all rights not expressly granted herein. ** ** Trolltech ASA (c) 2007 ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #ifndef GRADIENTS_H #define GRADIENTS_H #include "arthurwidgets.h" #include <QtGui> class HoverPoints; class ShadeWidget : public QWidget { Q_OBJECT public: enum ShadeType { RedShade, GreenShade, BlueShade, ARGBShade }; ShadeWidget(ShadeType type, QWidget *parent); void setGradientStops(const QGradientStops &stops); void paintEvent(QPaintEvent *e); QSize sizeHint() const { return QSize(150, 40); } QPolygonF points() const; HoverPoints *hoverPoints() const { return m_hoverPoints; } uint colorAt(int x); signals: void colorsChanged(); private: void generateShade(); ShadeType m_shade_type; QImage m_shade; HoverPoints *m_hoverPoints; QLinearGradient m_alpha_gradient; }; class GradientEditor : public QWidget { Q_OBJECT public: GradientEditor(QWidget *parent); void setGradientStops(const QGradientStops &stops); public slots: void pointsUpdated(); signals: void gradientStopsChanged(const QGradientStops &stops); private: ShadeWidget *m_red_shade; ShadeWidget *m_green_shade; ShadeWidget *m_blue_shade; ShadeWidget *m_alpha_shade; }; class GradientRenderer : public ArthurFrame { Q_OBJECT public: GradientRenderer(QWidget *parent); void paint(QPainter *p); QSize sizeHint() const { return QSize(400, 400); } HoverPoints *hoverPoints() const { return m_hoverPoints; } void mousePressEvent(QMouseEvent *e); public slots: void setGradientStops(const QGradientStops &stops); void setPadSpread() { m_spread = QGradient::PadSpread; update(); } void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); } void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); } void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); } void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); } void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); } private: QGradientStops m_stops; HoverPoints *m_hoverPoints; QGradient::Spread m_spread; Qt::BrushStyle m_gradientType; }; class GradientWidget : public QWidget { Q_OBJECT public: GradientWidget(QWidget *parent); public slots: void setDefault1() { setDefault(1); } void setDefault2() { setDefault(2); } void setDefault3() { setDefault(3); } void setDefault4() { setDefault(4); } private: void setDefault(int i); GradientRenderer *m_renderer; GradientEditor *m_editor; QRadioButton *m_linearButton; QRadioButton *m_radialButton; QRadioButton *m_conicalButton; QRadioButton *m_padSpreadButton; QRadioButton *m_reflectSpreadButton; QRadioButton *m_repeatSpreadButton; }; #endif // GRADIENTS_H
Copyright © 2007 Trolltech | Trademarks | Qt 4.3.2
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