mirror of
https://github.com/Gator96100/ProxSpace.git
synced 2025-07-31 03:50:15 -07:00
361 lines
11 KiB
QML
361 lines
11 KiB
QML
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2015 The Qt Company Ltd.
|
|
** Contact: http://www.qt.io/licensing/
|
|
**
|
|
** This file is part of the Qt Graphical Effects module.
|
|
**
|
|
** $QT_BEGIN_LICENSE:BSD$
|
|
** You may use this file under the terms of the BSD license as follows:
|
|
**
|
|
** "Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions are
|
|
** met:
|
|
** * Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** * Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in
|
|
** the documentation and/or other materials provided with the
|
|
** distribution.
|
|
** * Neither the name of The Qt Company Ltd nor the names of its
|
|
** contributors may be used to endorse or promote products derived
|
|
** from this software without specific prior written permission.
|
|
**
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
import QtQuick 2.0
|
|
import QtGraphicalEffects.private 1.0
|
|
|
|
/*!
|
|
\qmltype ConicalGradient
|
|
\inqmlmodule QtGraphicalEffects
|
|
\since QtGraphicalEffects 1.0
|
|
\inherits QtQuick2::Item
|
|
\ingroup qtgraphicaleffects-gradient
|
|
\brief Draws a conical gradient.
|
|
|
|
A gradient is defined by two or more colors, which are blended seamlessly.
|
|
The colors start from the specified angle and end at 360 degrees larger
|
|
angle value.
|
|
|
|
\table
|
|
\header
|
|
\li Effect applied
|
|
\row
|
|
\li \image ConicalGradient.png
|
|
\endtable
|
|
|
|
\section1 Example
|
|
|
|
The following example shows how to apply the effect.
|
|
\snippet ConicalGradient-example.qml example
|
|
|
|
*/
|
|
Item {
|
|
id: rootItem
|
|
|
|
/*!
|
|
This property allows the effect output pixels to be cached in order to
|
|
improve the rendering performance.
|
|
|
|
Every time the source or effect properties are changed, the pixels in
|
|
the cache must be updated. Memory consumption is increased, because an
|
|
extra buffer of memory is required for storing the effect output.
|
|
|
|
It is recommended to disable the cache when the source or the effect
|
|
properties are animated.
|
|
|
|
By default, the property is set to \c false.
|
|
|
|
*/
|
|
property bool cached: false
|
|
|
|
/*!
|
|
This property defines the starting angle where the color at the gradient
|
|
position of 0.0 is rendered. Colors at larger position values are
|
|
rendered into larger angle values and blended seamlessly. Angle values
|
|
increase clockwise.
|
|
|
|
\table
|
|
\header
|
|
\li Output examples with different angle values
|
|
\li
|
|
\li
|
|
\row
|
|
\li \image ConicalGradient_angle1.png
|
|
\li \image ConicalGradient_angle2.png
|
|
\li \image ConicalGradient_angle3.png
|
|
\row
|
|
\li \b { angle: 0 }
|
|
\li \b { angle: 45 }
|
|
\li \b { angle: 185 }
|
|
\row
|
|
\li \l horizontalOffset: 0
|
|
\li \l horizontalOffset: 0
|
|
\li \l horizontalOffset: 0
|
|
\row
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\endtable
|
|
|
|
*/
|
|
property real angle: 0.0
|
|
|
|
/*!
|
|
\qmlproperty real QtGraphicalEffects::ConicalGradient::horizontalOffset
|
|
\qmlproperty real QtGraphicalEffects::ConicalGradient::verticalOffset
|
|
|
|
The horizontalOffset and verticalOffset properties define the offset in
|
|
pixels for the center point of the gradient compared to the item center.
|
|
|
|
The value ranges from -inf to inf. By default, the properties are set to \c
|
|
0.
|
|
|
|
\table
|
|
\header
|
|
\li Output examples with different horizontalOffset values
|
|
\li
|
|
\li
|
|
\row
|
|
\li \image ConicalGradient_horizontalOffset1.png
|
|
\li \image ConicalGradient_horizontalOffset2.png
|
|
\li \image ConicalGradient_horizontalOffset3.png
|
|
\row
|
|
\li \b { horizontalOffset: -50 }
|
|
\li \b { horizontalOffset: 0 }
|
|
\li \b { horizontalOffset: 50 }
|
|
\row
|
|
\li \l angle: 0
|
|
\li \l angle: 0
|
|
\li \l angle: 0
|
|
\row
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\endtable
|
|
*/
|
|
property real horizontalOffset: 0.0
|
|
property real verticalOffset: 0.0
|
|
|
|
/*!
|
|
This property defines the item that is going to be filled with gradient.
|
|
Source item gets rendered into an intermediate pixel buffer and the
|
|
alpha values from the result are used to determine the gradient's pixels
|
|
visibility in the display. The default value for source is undefined and
|
|
in that case whole effect area is filled with gradient.
|
|
|
|
\table
|
|
\header
|
|
\li Output examples with different source values
|
|
\li
|
|
\row
|
|
\li \image ConicalGradient_maskSource1.png
|
|
\li \image ConicalGradient_maskSource2.png
|
|
\row
|
|
\li \b { source: undefined }
|
|
\li \b { source: }
|
|
\row
|
|
\li \l angle: 0
|
|
\li \l angle: 0
|
|
\row
|
|
\li \l horizontalOffset: 0
|
|
\li \l horizontalOffset: 0
|
|
\row
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\endtable
|
|
|
|
|
|
\note It is not supported to let the effect include itself, for
|
|
instance by setting source to the effect's parent.
|
|
*/
|
|
property variant source
|
|
|
|
/*!
|
|
A gradient is defined by two or more colors, which are blended seamlessly.
|
|
The colors are specified as a set of GradientStop child items, each of which
|
|
defines a position on the gradient (from 0.0 to 1.0), and a color.
|
|
The position of each GradientStop is defined by the position property.
|
|
The color is defined by the color property.
|
|
|
|
\table
|
|
\header
|
|
\li Output examples with different gradient values
|
|
\li
|
|
\li
|
|
\row
|
|
\li \image ConicalGradient_gradient1.png
|
|
\li \image ConicalGradient_gradient2.png
|
|
\li \image ConicalGradient_gradient3.png
|
|
\row
|
|
\li \b {gradient:} \code
|
|
Gradient {
|
|
GradientStop {
|
|
position: 0.000
|
|
color: Qt.rgba(1, 0, 0, 1)
|
|
}
|
|
GradientStop {
|
|
position: 0.167
|
|
color: Qt.rgba(1, 1, 0, 1)
|
|
}
|
|
GradientStop {
|
|
position: 0.333
|
|
color: Qt.rgba(0, 1, 0, 1)
|
|
}
|
|
GradientStop {
|
|
position: 0.500
|
|
color: Qt.rgba(0, 1, 1, 1)
|
|
}
|
|
GradientStop {
|
|
position: 0.667
|
|
color: Qt.rgba(0, 0, 1, 1)
|
|
}
|
|
GradientStop {
|
|
position: 0.833
|
|
color: Qt.rgba(1, 0, 1, 1)
|
|
}
|
|
GradientStop {
|
|
position: 1.000
|
|
color: Qt.rgba(1, 0, 0, 1)
|
|
}
|
|
}
|
|
\endcode
|
|
\li \b {gradient:} \code
|
|
Gradient {
|
|
GradientStop {
|
|
position: 0.0
|
|
color: "#F0F0F0"
|
|
}
|
|
GradientStop {
|
|
position: 0.5
|
|
color: "#000000"
|
|
}
|
|
GradientStop {
|
|
position: 1.0
|
|
color: "#F0F0F0"
|
|
}
|
|
}
|
|
\endcode
|
|
\li \b {gradient:} \code
|
|
Gradient {
|
|
GradientStop {
|
|
position: 0.0
|
|
color: "#00000000"
|
|
}
|
|
GradientStop {
|
|
position: 1.0
|
|
color: "#FF000000"
|
|
}
|
|
}
|
|
\endcode
|
|
\row
|
|
\li \l angle: 0
|
|
\li \l angle: 0
|
|
\li \l angle: 0
|
|
\row
|
|
\li \l horizontalOffset: 0
|
|
\li \l horizontalOffset: 0
|
|
\li \l horizontalOffset: 0
|
|
\row
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\li \l verticalOffset: 0
|
|
\endtable
|
|
|
|
*/
|
|
property Gradient gradient: Gradient {
|
|
GradientStop { position: 0.0; color: "white" }
|
|
GradientStop { position: 1.0; color: "black" }
|
|
}
|
|
|
|
SourceProxy {
|
|
id: maskSourceProxy
|
|
input: rootItem.source
|
|
}
|
|
|
|
Rectangle {
|
|
id: gradientRect
|
|
width: 16
|
|
height: 256
|
|
gradient: rootItem.gradient
|
|
smooth: true
|
|
}
|
|
|
|
ShaderEffectSource {
|
|
id: cacheItem
|
|
anchors.fill: parent
|
|
visible: rootItem.cached
|
|
smooth: true
|
|
rotation: shaderItem.rotation
|
|
sourceItem: shaderItem
|
|
live: true
|
|
hideSource: visible
|
|
}
|
|
|
|
ShaderEffect {
|
|
id: shaderItem
|
|
property variant gradientSource: ShaderEffectSource {
|
|
sourceItem: gradientRect
|
|
smooth: true
|
|
hideSource: true
|
|
visible: false
|
|
}
|
|
property variant maskSource: maskSourceProxy.output
|
|
property real startAngle: (rootItem.angle - 90) * Math.PI/180
|
|
property variant center: Qt.point(0.5 + horizontalOffset / width, 0.5 + verticalOffset / height)
|
|
|
|
anchors.fill: parent
|
|
|
|
fragmentShader: maskSource == undefined ? noMaskShader : maskShader
|
|
|
|
onFragmentShaderChanged: startAngleChanged()
|
|
|
|
property string noMaskShader: "
|
|
varying mediump vec2 qt_TexCoord0;
|
|
uniform lowp sampler2D gradientSource;
|
|
uniform highp float qt_Opacity;
|
|
uniform highp float startAngle;
|
|
uniform highp vec2 center;
|
|
|
|
void main() {
|
|
const highp float PI = 3.14159265;
|
|
const highp float PIx2inv = 0.1591549;
|
|
highp float a = (atan((center.y - qt_TexCoord0.t), (center.x - qt_TexCoord0.s)) + PI - startAngle) * PIx2inv;
|
|
gl_FragColor = texture2D(gradientSource, vec2(0.0, fract(a))) * qt_Opacity;
|
|
}
|
|
"
|
|
|
|
property string maskShader: "
|
|
varying mediump vec2 qt_TexCoord0;
|
|
uniform lowp sampler2D gradientSource;
|
|
uniform lowp sampler2D maskSource;
|
|
uniform highp float qt_Opacity;
|
|
uniform highp float startAngle;
|
|
uniform highp vec2 center;
|
|
|
|
void main() {
|
|
lowp float maskAlpha = texture2D(maskSource, qt_TexCoord0).a;
|
|
const highp float PI = 3.14159265;
|
|
const highp float PIx2inv = 0.1591549;
|
|
highp float a = (atan((center.y - qt_TexCoord0.t), (center.x - qt_TexCoord0.s)) + PI - startAngle) * PIx2inv;
|
|
gl_FragColor = texture2D(gradientSource, vec2(0.0, fract(a))) * maskAlpha * qt_Opacity;
|
|
}
|
|
"
|
|
}
|
|
}
|