40a54bf565
Examples should demonstrate best practice, and we can use the keyword directly nowadays. Change-Id: I1f122e5caceca17290757ffbaf3d660e7daa9ae4 Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>
184 lines
5.3 KiB
C++
184 lines
5.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef GRADIENTS_H
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#define GRADIENTS_H
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#include "arthurwidgets.h"
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QT_BEGIN_NAMESPACE
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class QRadioButton;
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QT_END_NAMESPACE
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class HoverPoints;
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class ShadeWidget : public QWidget
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{
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Q_OBJECT
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public:
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enum ShadeType {
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RedShade,
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GreenShade,
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BlueShade,
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ARGBShade
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};
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ShadeWidget(ShadeType type, QWidget *parent);
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void setGradientStops(const QGradientStops &stops);
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void paintEvent(QPaintEvent *e) override;
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QSize sizeHint() const override { return QSize(150, 40); }
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QPolygonF points() const;
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HoverPoints *hoverPoints() const { return m_hoverPoints; }
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uint colorAt(int x);
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signals:
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void colorsChanged();
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private:
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void generateShade();
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ShadeType m_shade_type;
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QImage m_shade;
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HoverPoints *m_hoverPoints;
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QLinearGradient m_alpha_gradient;
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};
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class GradientEditor : public QWidget
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{
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Q_OBJECT
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public:
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GradientEditor(QWidget *parent);
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void setGradientStops(const QGradientStops &stops);
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public slots:
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void pointsUpdated();
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signals:
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void gradientStopsChanged(const QGradientStops &stops);
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private:
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ShadeWidget *m_red_shade;
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ShadeWidget *m_green_shade;
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ShadeWidget *m_blue_shade;
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ShadeWidget *m_alpha_shade;
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};
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class GradientRenderer : public ArthurFrame
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{
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Q_OBJECT
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public:
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GradientRenderer(QWidget *parent);
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void paint(QPainter *p) override;
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QSize sizeHint() const override { return QSize(400, 400); }
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HoverPoints *hoverPoints() const { return m_hoverPoints; }
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void mousePressEvent(QMouseEvent *e) override;
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public slots:
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void setGradientStops(const QGradientStops &stops);
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void setPadSpread() { m_spread = QGradient::PadSpread; update(); }
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void setRepeatSpread() { m_spread = QGradient::RepeatSpread; update(); }
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void setReflectSpread() { m_spread = QGradient::ReflectSpread; update(); }
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void setLinearGradient() { m_gradientType = Qt::LinearGradientPattern; update(); }
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void setRadialGradient() { m_gradientType = Qt::RadialGradientPattern; update(); }
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void setConicalGradient() { m_gradientType = Qt::ConicalGradientPattern; update(); }
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private:
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QGradientStops m_stops;
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HoverPoints *m_hoverPoints;
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QGradient::Spread m_spread;
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Qt::BrushStyle m_gradientType;
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};
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class GradientWidget : public QWidget
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{
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Q_OBJECT
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public:
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GradientWidget(QWidget *parent);
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public slots:
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void setDefault1() { setDefault(1); }
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void setDefault2() { setDefault(2); }
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void setDefault3() { setDefault(3); }
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void setDefault4() { setDefault(4); }
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private:
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void setDefault(int i);
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GradientRenderer *m_renderer;
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GradientEditor *m_editor;
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QRadioButton *m_linearButton;
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QRadioButton *m_radialButton;
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QRadioButton *m_conicalButton;
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QRadioButton *m_padSpreadButton;
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QRadioButton *m_reflectSpreadButton;
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QRadioButton *m_repeatSpreadButton;
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};
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#endif // GRADIENTS_H
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