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lupoDharkael
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Qt-Color-Widgets

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165
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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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The "Minimal Corresponding Source" for a Combined Work means the
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Linking this library statically or dynamically with other modules is making a
combined work based on this library. Thus, the terms and conditions of the
GNU Lesser General Public License version 3 cover the whole combination.
As a special exception, the copyright holders of this library give you
permission to combine this library with independent
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by the Free Software Foundation, provided that you also meet,
for each linked independent module, the terms and conditions of the license of
that module. An independent module is a module which is not derived from or
based on this library. If you modify this library, you may extend this
exception to your version of the library, but you are not obliged to do so.
If you do not wish to do so, delete this exception statement from your version.

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Color Widgets
=============
Here is a color dialog that is more user-friendly than the default QColorDialog
and several other color-related widgets
The provided widgets are:
* ColorWheel, An analog widget used to select a color
* ColorPreview, A simple widget that displays a color
* GradientSlider, A slider that has a gradient background
* HueSlider, A variant of GradientSlider that has a rainbow background
* ColorSelector, A ColorPreview that shows a ColorDialog when clicked
* ColorDialog, A dialog that uses the above widgets to provide a better user experience than QColorDialog
* ColorListWidget, A widget to edit a list of colors
* Swatch, A widget to display a color palette
* ColorPaletteWidget, A widget to use and manage a list of palettes
* Color2DSlider, An analog widget used to select 2 color components
* ColorLineEdit, A widget to manipulate a string representing a color
they are all in the color_widgets namespace.
See [the gallery](gallery/README.md) for more information and screenshots.
Using it in a project
---------------------
For QMake-based projects, include color_widgets.pri in the QMake project file.
For CMake-based projects, add this as subdirectory, it will be compiled as a
library and you can link the required targets to ColorWidgets-qt5.
All the required files are in ./src and ./include.
Installing as a Qt Designer/Creator Plugin
------------------------------------------
The sources for the designer plugin are in ./color_widgets_designer_plugin
Compile the library and install in
(Qt SDK)/Tools/QtCreator/bin/designer/
(Qt SDK)/(Qt Version)/(Toolchain)/plugins/designer
cd build && cmake .. && make ColorWidgetsPlugin && make install
Latest Version
--------------
The latest version of the sources can be found at the following locations:
* https://github.com/mbasaglia/Qt-Color-Widgets
* git://github.com/mbasaglia/Qt-Color-Widgets.git
License
-------
LGPLv3+, See COPYING.
As a special exception, this library can be included in any project under the
terms of any of the GNU liceses, distributing the whole project under a
different GNU license, see LICENSE-EXCEPTION for details.
Copyright (C) 2013-2017 Mattia Basaglia <mattia.basaglia@gmail.com>

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# Copyright (C) 2013-2017 Mattia Basaglia
#
#
# This software is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This software 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Color Widgets. If not, see <http://www.gnu.org/licenses/>.
CONFIG += c++11
INCLUDEPATH += $$PWD/src $$PWD/include
SOURCES += \
$$PWD/src/color_wheel.cpp \
$$PWD/src/color_utils.cpp
HEADERS += \
$$PWD/include/color_wheel.hpp \
$$PWD/include/colorwidgets_global.hpp \
$$PWD/src/color_utils.hpp
RESOURCES += \
$$PWD/src/color_widgets.qrc

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#
# Copyright (C) 2013-2017 Mattia Basaglia
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
TEMPLATE=lib
CONFIG += dll
QT += core gui widgets
DEFINES += QTCOLORWIDGETS_LIBRARY
TARGET=ColorWidgets-qt5
VERSION=1.0.0
OBJECTS_DIR = out/obj
MOC_DIR = out/generated
UI_DIR = out/generated
RCC_DIR = out/generated
include(color_widgets.pri)
build_all:!build_pass {
CONFIG -= build_all
CONFIG += release
}
unix {
LIB_TARGET = lib$${TARGET}.so
}
win32 {
LIB_TARGET = $${TARGET}.dll
}
isEmpty(PREFIX) {
PREFIX = /usr/local
}
target.path = $$PREFIX/lib
headers.path = $$PREFIX/include/QtColorWidgets
headers.files = $$HEADERS
INSTALLS += target headers

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#include "color_wheel.hpp"

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/**
* \file
*
* \author Mattia Basaglia
*
* \copyright Copyright (C) 2013-2017 Mattia Basaglia
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef COLOR_WHEEL_HPP
#define COLOR_WHEEL_HPP
#include "colorwidgets_global.hpp"
#include <QWidget>
namespace color_widgets {
/**
* \brief Display an analog widget that allows the selection of a HSV color
*
* It has an outer wheel to select the Hue and an intenal square to select
* Saturation and Lightness.
*/
class QCP_EXPORT ColorWheel : public QWidget
{
Q_OBJECT
Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged DESIGNABLE true STORED false )
Q_PROPERTY(qreal hue READ hue WRITE setHue DESIGNABLE false )
Q_PROPERTY(qreal saturation READ saturation WRITE setSaturation DESIGNABLE false )
Q_PROPERTY(qreal value READ value WRITE setValue DESIGNABLE false )
Q_PROPERTY(unsigned wheelWidth READ wheelWidth WRITE setWheelWidth DESIGNABLE true )
Q_PROPERTY(DisplayFlags displayFlags READ displayFlags WRITE setDisplayFlags NOTIFY displayFlagsChanged DESIGNABLE true )
public:
enum DisplayEnum
{
SHAPE_DEFAULT = 0x000, ///< Use the default shape
SHAPE_TRIANGLE = 0x001, ///< A triangle
SHAPE_SQUARE = 0x002, ///< A square
SHAPE_FLAGS = 0x00f, ///< Mask for the shape flags
ANGLE_DEFAULT = 0x000, ///< Use the default rotation style
ANGLE_FIXED = 0x010, ///< The inner part doesn't rotate
ANGLE_ROTATING = 0x020, ///< The inner part follows the hue selector
ANGLE_FLAGS = 0x0f0, ///< Mask for the angle flags
COLOR_DEFAULT = 0x000, ///< Use the default colorspace
COLOR_HSV = 0x100, ///< Use the HSV color space
COLOR_HSL = 0x200, ///< Use the HSL color space
COLOR_LCH = 0x400, ///< Use Luma Chroma Hue (Y_601')
COLOR_FLAGS = 0xf00, ///< Mask for the color space flags
FLAGS_DEFAULT = 0x000, ///< Use all defaults
FLAGS_ALL = 0xfff ///< Mask matching all flags
};
Q_DECLARE_FLAGS(DisplayFlags, DisplayEnum)
Q_FLAGS(DisplayFlags)
explicit ColorWheel(QWidget *parent = 0);
~ColorWheel();
/// Get current color
QColor color() const;
virtual QSize sizeHint() const Q_DECL_OVERRIDE;
/// Get current hue in the range [0-1]
qreal hue() const;
/// Get current saturation in the range [0-1]
qreal saturation() const;
/// Get current value in the range [0-1]
qreal value() const;
/// Get the width in pixels of the outer wheel
unsigned int wheelWidth() const;
/// Set the width in pixels of the outer wheel
void setWheelWidth(unsigned int w);
/// Get display flags
DisplayFlags displayFlags(DisplayFlags mask = FLAGS_ALL) const;
/// Set the default display flags
static void setDefaultDisplayFlags(DisplayFlags flags);
/// Get default display flags
static DisplayFlags defaultDisplayFlags(DisplayFlags mask = FLAGS_ALL);
/**
* @brief Set a specific display flag
* @param flag Flag replacing the mask
* @param mask Mask to be cleared
*/
void setDisplayFlag(DisplayFlags flag, DisplayFlags mask);
public Q_SLOTS:
/// Set current color
void setColor(QColor c);
/**
* @param h Hue [0-1]
*/
void setHue(qreal h);
/**
* @param s Saturation [0-1]
*/
void setSaturation(qreal s);
/**
* @param v Value [0-1]
*/
void setValue(qreal v);
/**
* @brief Set the display flags
* @param flags which will replace the current ones
*/
void setDisplayFlags(ColorWheel::DisplayFlags flags);
Q_SIGNALS:
/**
* Emitted when the user selects a color or setColor is called
*/
void colorChanged(QColor);
/**
* Emitted when the user selects a color
*/
void colorSelected(QColor);
void displayFlagsChanged(ColorWheel::DisplayFlags flags);
void mouseReleaseOnColor(QColor);
protected:
void paintEvent(QPaintEvent *) Q_DECL_OVERRIDE;
void mouseMoveEvent(QMouseEvent *) Q_DECL_OVERRIDE;
void mousePressEvent(QMouseEvent *) Q_DECL_OVERRIDE;
void resizeEvent(QResizeEvent *) Q_DECL_OVERRIDE;
void mouseReleaseEvent(QMouseEvent *) Q_DECL_OVERRIDE;
void dragEnterEvent(QDragEnterEvent* event) Q_DECL_OVERRIDE;
void dropEvent(QDropEvent* event) Q_DECL_OVERRIDE;
private:
class Private;
Private * const p;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(ColorWheel::DisplayFlags)
} // namespace color_widgets
#endif // COLOR_WHEEL_HPP

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#ifndef QT_COLOR_WIDGETS_GLOBAL_H
#define QT_COLOR_WIDGETS_GLOBAL_H
#include <QtCore/QtGlobal>
#if defined(QTCOLORWIDGETS_LIBRARY)
# define QCP_EXPORT Q_DECL_EXPORT
#elif defined(QTCOLORWIDGETS_STATICALLY_LINKED)
# define QCP_EXPORT
#else
# define QCP_EXPORT Q_DECL_IMPORT
#endif
#endif // QT_COLOR_WIDGETS_GLOBAL_H

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/**
* \file
*
* \author Mattia Basaglia
*
* \copyright Copyright (C) 2013-2017 Mattia Basaglia
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "color_utils.hpp"
namespace color_widgets {
namespace detail {
QColor color_from_lch(qreal hue, qreal chroma, qreal luma, qreal alpha )
{
qreal h1 = hue*6;
qreal x = chroma*(1-qAbs(std::fmod(h1,2)-1));
QColor col;
if ( h1 >= 0 && h1 < 1 )
col = QColor::fromRgbF(chroma,x,0);
else if ( h1 < 2 )
col = QColor::fromRgbF(x,chroma,0);
else if ( h1 < 3 )
col = QColor::fromRgbF(0,chroma,x);
else if ( h1 < 4 )
col = QColor::fromRgbF(0,x,chroma);
else if ( h1 < 5 )
col = QColor::fromRgbF(x,0,chroma);
else if ( h1 < 6 )
col = QColor::fromRgbF(chroma,0,x);
qreal m = luma - color_lumaF(col);
return QColor::fromRgbF(
qBound(0.0,col.redF()+m,1.0),
qBound(0.0,col.greenF()+m,1.0),
qBound(0.0,col.blueF()+m,1.0),
alpha);
}
QColor color_from_hsl(qreal hue, qreal sat, qreal lig, qreal alpha )
{
qreal chroma = (1 - qAbs(2*lig-1))*sat;
qreal h1 = hue*6;
qreal x = chroma*(1-qAbs(std::fmod(h1,2)-1));
QColor col;
if ( h1 >= 0 && h1 < 1 )
col = QColor::fromRgbF(chroma,x,0);
else if ( h1 < 2 )
col = QColor::fromRgbF(x,chroma,0);
else if ( h1 < 3 )
col = QColor::fromRgbF(0,chroma,x);
else if ( h1 < 4 )
col = QColor::fromRgbF(0,x,chroma);
else if ( h1 < 5 )
col = QColor::fromRgbF(x,0,chroma);
else if ( h1 < 6 )
col = QColor::fromRgbF(chroma,0,x);
qreal m = lig-chroma/2;
return QColor::fromRgbF(
qBound(0.0,col.redF()+m,1.0),
qBound(0.0,col.greenF()+m,1.0),
qBound(0.0,col.blueF()+m,1.0),
alpha);
}
} // namespace detail
} // namespace color_widgets

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/**
* \file
*
* \author Mattia Basaglia
*
* \copyright Copyright (C) 2013-2017 Mattia Basaglia
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <QColor>
#include <qmath.h>
namespace color_widgets {
namespace detail {
inline qreal color_chromaF(const QColor& c)
{
qreal max = qMax(c.redF(), qMax(c.greenF(), c.blueF()));
qreal min = qMin(c.redF(), qMin(c.greenF(), c.blueF()));
return max - min;
}
inline qreal color_lumaF(const QColor& c)
{
return 0.30 * c.redF() + 0.59 * c.greenF() + 0.11 * c.blueF();
}
QColor color_from_lch(qreal hue, qreal chroma, qreal luma, qreal alpha = 1 );
inline QColor rainbow_lch(qreal hue)
{
return color_from_lch(hue,1,1);
}
inline QColor rainbow_hsv(qreal hue)
{
return QColor::fromHsvF(hue,1,1);
}
inline qreal color_lightnessF(const QColor& c)
{
return ( qMax(c.redF(),qMax(c.greenF(),c.blueF())) +
qMin(c.redF(),qMin(c.greenF(),c.blueF())) ) / 2;
}
inline qreal color_HSL_saturationF(const QColor& col)
{
qreal c = color_chromaF(col);
qreal l = color_lightnessF(col);
if ( qFuzzyCompare(l+1,1) || qFuzzyCompare(l+1,2) )
return 0;
return c / (1-qAbs(2*l-1));
}
QColor color_from_hsl(qreal hue, qreal sat, qreal lig, qreal alpha = 1 );
} // namespace detail
} // namespace color_widgets

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/**
* \file
*
* \author Mattia Basaglia
*
* \copyright Copyright (C) 2013-2017 Mattia Basaglia
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "color_wheel.hpp"
#include <cmath>
#include <QMouseEvent>
#include <QPainter>
#include <QLineF>
#include <QDragEnterEvent>
#include <QMimeData>
#include "color_utils.hpp"
namespace color_widgets {
enum MouseStatus
{
Nothing,
DragCircle,
DragSquare
};
static const ColorWheel::DisplayFlags hard_default_flags = ColorWheel::SHAPE_TRIANGLE|ColorWheel::ANGLE_ROTATING|ColorWheel::COLOR_HSV;
static ColorWheel::DisplayFlags default_flags = hard_default_flags;
static const double selector_radius = 6;
class ColorWheel::Private
{
private:
ColorWheel * const w;
public:
qreal hue, sat, val;
unsigned int wheel_width;
MouseStatus mouse_status;
QPixmap hue_ring;
QImage inner_selector;
DisplayFlags display_flags;
QColor (*color_from)(qreal,qreal,qreal,qreal);
QColor (*rainbow_from_hue)(qreal);
int max_size = 128;
Private(ColorWheel *widget)
: w(widget), hue(0), sat(0), val(0),
wheel_width(20), mouse_status(Nothing),
display_flags(FLAGS_DEFAULT),
color_from(&QColor::fromHsvF), rainbow_from_hue(&detail::rainbow_hsv)
{ }
/// Calculate outer wheel radius from idget center
qreal outer_radius() const
{
return qMin(w->geometry().width(), w->geometry().height())/2;
}
/// Calculate inner wheel radius from idget center
qreal inner_radius() const
{
return outer_radius()-wheel_width;
}
/// Calculate the edge length of the inner square
qreal square_size() const
{
return inner_radius()*qSqrt(2);
}
/// Calculate the height of the inner triangle
qreal triangle_height() const
{
return inner_radius()*3/2;
}
/// Calculate the side of the inner triangle
qreal triangle_side() const
{
return inner_radius()*qSqrt(3);
}
/// return line from center to given point
QLineF line_to_point(const QPoint &p) const
{
return QLineF (w->geometry().width()/2, w->geometry().height()/2, p.x(), p.y());
}
void render_square()
{
int width = qMin<int>(square_size(), max_size);
QSize size(width, width);
inner_selector = QImage(size, QImage::Format_RGB32);
for ( int y = 0; y < width; ++y )
{
for ( int x = 0; x < width; ++x )
{
inner_selector.setPixel( x, y,
color_from(hue,double(x)/width,double(y)/width,1).rgb());
}
}
}
/**
* \brief renders the selector as a triangle
* \note It's the same as a square with the edge with value=0 collapsed to a single point
*/
void render_triangle()
{
QSizeF size = selector_size();
if ( size.height() > max_size )
size *= max_size / size.height();
qreal ycenter = size.height()/2;
inner_selector = QImage(size.toSize(), QImage::Format_RGB32);
for (int x = 0; x < inner_selector.width(); x++ )
{
qreal pval = x / size.height();
qreal slice_h = size.height() * pval;
for (int y = 0; y < inner_selector.height(); y++ )
{
qreal ymin = ycenter-slice_h/2;
qreal psat = qBound(0.0,(y-ymin)/slice_h,1.0);
inner_selector.setPixel(x,y,color_from(hue,psat,pval,1).rgb());
}
}
}
/// Updates the inner image that displays the saturation-value selector
void render_inner_selector()
{
if ( display_flags & ColorWheel::SHAPE_TRIANGLE )
render_triangle();
else
render_square();
}
/// Offset of the selector image
QPointF selector_image_offset()
{
if ( display_flags & SHAPE_TRIANGLE )
return QPointF(-inner_radius(),-triangle_side()/2);
return QPointF(-square_size()/2,-square_size()/2);
}
/**
* \brief Size of the selector when rendered to the screen
*/
QSizeF selector_size()
{
if ( display_flags & SHAPE_TRIANGLE )
return QSizeF(triangle_height(), triangle_side());
return QSizeF(square_size(), square_size());
}
/// Rotation of the selector image
qreal selector_image_angle()
{
if ( display_flags & SHAPE_TRIANGLE )
{
if ( display_flags & ANGLE_ROTATING )
return -hue*360-60;
return -150;
}
else
{
if ( display_flags & ANGLE_ROTATING )
return -hue*360-45;
else
return 180;
}
}
/// Updates the outer ring that displays the hue selector
void render_ring()
{
hue_ring = QPixmap(outer_radius()*2,outer_radius()*2);
hue_ring.fill(Qt::transparent);
QPainter painter(&hue_ring);
painter.setRenderHint(QPainter::Antialiasing);
painter.setCompositionMode(QPainter::CompositionMode_Source);
const int hue_stops = 24;
QConicalGradient gradient_hue(0, 0, 0);
if ( gradient_hue.stops().size() < hue_stops )
{
for ( double a = 0; a < 1.0; a+=1.0/(hue_stops-1) )
{
gradient_hue.setColorAt(a,rainbow_from_hue(a));
}
gradient_hue.setColorAt(1,rainbow_from_hue(0));
}
painter.translate(outer_radius(),outer_radius());
painter.setPen(Qt::NoPen);
painter.setBrush(QBrush(gradient_hue));
painter.drawEllipse(QPointF(0,0),outer_radius(),outer_radius());
painter.setBrush(Qt::transparent);//palette().background());
painter.drawEllipse(QPointF(0,0),inner_radius(),inner_radius());
}
void set_color(const QColor& c)
{
if ( display_flags & ColorWheel::COLOR_HSV )
{
hue = qMax(0.0, c.hsvHueF());
sat = c.hsvSaturationF();
val = c.valueF();
}
else if ( display_flags & ColorWheel::COLOR_HSL )
{
hue = qMax(0.0, c.hueF());
sat = detail::color_HSL_saturationF(c);
val = detail::color_lightnessF(c);
}
else if ( display_flags & ColorWheel::COLOR_LCH )
{
hue = qMax(0.0, c.hsvHueF());
sat = detail::color_chromaF(c);
val = detail::color_lumaF(c);
}
}
};
ColorWheel::ColorWheel(QWidget *parent) :
QWidget(parent), p(new Private(this))
{
setDisplayFlags(FLAGS_DEFAULT);
setAcceptDrops(true);
}
ColorWheel::~ColorWheel()
{
delete p;
}
QColor ColorWheel::color() const
{
return p->color_from(p->hue, p->sat, p->val, 1);
}
QSize ColorWheel::sizeHint() const
{
return QSize(p->wheel_width*5, p->wheel_width*5);
}
qreal ColorWheel::hue() const
{
if ( (p->display_flags & COLOR_LCH) && p->sat > 0.01 )
return color().hueF();
return p->hue;
}
qreal ColorWheel::saturation() const
{
return color().hsvSaturationF();
}
qreal ColorWheel::value() const
{
return color().valueF();
}
unsigned int ColorWheel::wheelWidth() const
{
return p->wheel_width;
}
void ColorWheel::setWheelWidth(unsigned int w)
{
p->wheel_width = w;
p->render_inner_selector();
update();
}
void ColorWheel::paintEvent(QPaintEvent * )
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(geometry().width()/2,geometry().height()/2);
// hue wheel
if(p->hue_ring.isNull())
p->render_ring();
painter.drawPixmap(-p->outer_radius(), -p->outer_radius(), p->hue_ring);
// hue selector
painter.setPen(QPen(Qt::black,3));
painter.setBrush(Qt::NoBrush);
QLineF ray(0, 0, p->outer_radius(), 0);
ray.setAngle(p->hue*360);
QPointF h1 = ray.p2();
ray.setLength(p->inner_radius());
QPointF h2 = ray.p2();
painter.drawLine(h1,h2);
// lum-sat square
if(p->inner_selector.isNull())
p->render_inner_selector();
painter.rotate(p->selector_image_angle());
painter.translate(p->selector_image_offset());
QPointF selector_position;
if ( p->display_flags & SHAPE_SQUARE )
{
qreal side = p->square_size();
selector_position = QPointF(p->sat*side, p->val*side);
}
else if ( p->display_flags & SHAPE_TRIANGLE )
{
qreal side = p->triangle_side();
qreal height = p->triangle_height();
qreal slice_h = side * p->val;
qreal ymin = side/2-slice_h/2;
selector_position = QPointF(p->val*height, ymin + p->sat*slice_h);
QPolygonF triangle;
triangle.append(QPointF(0,side/2));
triangle.append(QPointF(height,0));
triangle.append(QPointF(height,side));
QPainterPath clip;
clip.addPolygon(triangle);
painter.setClipPath(clip);
}
painter.drawImage(QRectF(QPointF(0, 0), p->selector_size()), p->inner_selector);
painter.setClipping(false);
// lum-sat selector
painter.setPen(QPen(p->val > 0.5 ? Qt::black : Qt::white, 3));
painter.setBrush(Qt::NoBrush);
painter.drawEllipse(selector_position, selector_radius, selector_radius);
}
void ColorWheel::mouseMoveEvent(QMouseEvent *ev)
{
if (p->mouse_status == DragCircle )
{
p->hue = p->line_to_point(ev->pos()).angle()/360.0;
p->render_inner_selector();
Q_EMIT colorSelected(color());
Q_EMIT colorChanged(color());
update();
}
else if(p->mouse_status == DragSquare)
{
QLineF glob_mouse_ln = p->line_to_point(ev->pos());
QLineF center_mouse_ln ( QPointF(0,0),
glob_mouse_ln.p2() - glob_mouse_ln.p1() );
center_mouse_ln.setAngle(center_mouse_ln.angle()+p->selector_image_angle());
center_mouse_ln.setP2(center_mouse_ln.p2()-p->selector_image_offset());
if ( p->display_flags & SHAPE_SQUARE )
{
p->sat = qBound(0.0, center_mouse_ln.x2()/p->square_size(), 1.0);
p->val = qBound(0.0, center_mouse_ln.y2()/p->square_size(), 1.0);
}
else if ( p->display_flags & SHAPE_TRIANGLE )
{
QPointF pt = center_mouse_ln.p2();
qreal side = p->triangle_side();
p->val = qBound(0.0, pt.x() / p->triangle_height(), 1.0);
qreal slice_h = side * p->val;
qreal ycenter = side/2;
qreal ymin = ycenter-slice_h/2;
if ( slice_h > 0 )
p->sat = qBound(0.0, (pt.y()-ymin)/slice_h, 1.0);
}
Q_EMIT colorSelected(color());
Q_EMIT colorChanged(color());
update();
}
}
void ColorWheel::mousePressEvent(QMouseEvent *ev)
{
if ( ev->buttons() & Qt::LeftButton )
{
setFocus();
QLineF ray = p->line_to_point(ev->pos());
if ( ray.length() <= p->inner_radius() )
p->mouse_status = DragSquare;
else if ( ray.length() <= p->outer_radius() )
p->mouse_status = DragCircle;
// Update the color
mouseMoveEvent(ev);
}
}
void ColorWheel::mouseReleaseEvent(QMouseEvent *ev)
{
mouseMoveEvent(ev);
p->mouse_status = Nothing;
Q_EMIT mouseReleaseOnColor(color());
}
void ColorWheel::resizeEvent(QResizeEvent *)
{
p->render_ring();
p->render_inner_selector();
}
void ColorWheel::setColor(QColor c)
{
qreal oldh = p->hue;
p->set_color(c);
if (!qFuzzyCompare(oldh+1, p->hue+1))
p->render_inner_selector();
update();
Q_EMIT colorChanged(c);
}
void ColorWheel::setHue(qreal h)
{
p->hue = qBound(0.0, h, 1.0);
p->render_inner_selector();
update();
}
void ColorWheel::setSaturation(qreal s)
{
p->sat = qBound(0.0, s, 1.0);
update();
}
void ColorWheel::setValue(qreal v)
{
p->val = qBound(0.0, v, 1.0);
update();
}
void ColorWheel::setDisplayFlags(DisplayFlags flags)
{
if ( ! (flags & COLOR_FLAGS) )
flags |= default_flags & COLOR_FLAGS;
if ( ! (flags & ANGLE_FLAGS) )
flags |= default_flags & ANGLE_FLAGS;
if ( ! (flags & SHAPE_FLAGS) )
flags |= default_flags & SHAPE_FLAGS;
if ( (flags & COLOR_FLAGS) != (p->display_flags & COLOR_FLAGS) )
{
QColor old_col = color();
if ( flags & ColorWheel::COLOR_HSL )
{
p->hue = old_col.hueF();
p->sat = detail::color_HSL_saturationF(old_col);
p->val = detail::color_lightnessF(old_col);
p->color_from = &detail::color_from_hsl;
p->rainbow_from_hue = &detail::rainbow_hsv;
}
else if ( flags & ColorWheel::COLOR_LCH )
{
p->hue = old_col.hueF();
p->sat = detail::color_chromaF(old_col);
p->val = detail::color_lumaF(old_col);
p->color_from = &detail::color_from_lch;
p->rainbow_from_hue = &detail::rainbow_lch;
}
else
{
p->hue = old_col.hsvHueF();
p->sat = old_col.hsvSaturationF();
p->val = old_col.valueF();
p->color_from = &QColor::fromHsvF;
p->rainbow_from_hue = &detail::rainbow_hsv;
}
p->render_ring();
}
p->display_flags = flags;
p->render_inner_selector();
update();
Q_EMIT displayFlagsChanged(flags);
}
ColorWheel::DisplayFlags ColorWheel::displayFlags(DisplayFlags mask) const
{
return p->display_flags & mask;
}
void ColorWheel::setDefaultDisplayFlags(DisplayFlags flags)
{
if ( !(flags & COLOR_FLAGS) )
flags |= hard_default_flags & COLOR_FLAGS;
if ( !(flags & ANGLE_FLAGS) )
flags |= hard_default_flags & ANGLE_FLAGS;
if ( !(flags & SHAPE_FLAGS) )
flags |= hard_default_flags & SHAPE_FLAGS;
default_flags = flags;
}
ColorWheel::DisplayFlags ColorWheel::defaultDisplayFlags(DisplayFlags mask)
{
return default_flags & mask;
}
void ColorWheel::setDisplayFlag(DisplayFlags flag, DisplayFlags mask)
{
setDisplayFlags((p->display_flags&~mask)|flag);
}
void ColorWheel::dragEnterEvent(QDragEnterEvent* event)
{
if ( event->mimeData()->hasColor() ||
( event->mimeData()->hasText() && QColor(event->mimeData()->text()).isValid() ) )
event->acceptProposedAction();
}
void ColorWheel::dropEvent(QDropEvent* event)
{
if ( event->mimeData()->hasColor() )
{
setColor(event->mimeData()->colorData().value<QColor>());
event->accept();
}
else if ( event->mimeData()->hasText() )
{
QColor col(event->mimeData()->text());
if ( col.isValid() )
{
setColor(col);
event->accept();
}
}
}
} // namespace color_widgets

5
Qt-Color-Widgets/src/color_widgets.qrc Normal file
View File

@@ -0,0 +1,5 @@
<RCC>
<qresource prefix="/color_widgets">
<file>alphaback.png</file>
</qresource>
</RCC>