Qt功能优化：Qt 3D画廊

@TOC

一、效果图

如下图所示：

二、使用步骤

1. .pro部分

代码如下：

TEMPLATE = app

QT += qml quick
CONFIG += c++11

SOURCES += main.cpp

RESOURCES += qml.qrc \
    image.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

2. .qml部分

Demo.qml

代码如下：

import QtQuick 2.0
import QtGraphicalEffects 1.0

Rectangle {
id:coverflow

property ListModel model
property int itemCount: 5

PathView{
    id:pathView
    model:coverflow.model
    delegate: Item {
        id:delegateItem
        width: 530
        height: 420
        z:PathView.iconZ
        scale:PathView.iconScale

        Image{
            id:image
            source: url
            width: delegateItem.width
            height: delegateItem.height
        }
        ShaderEffect {
            anchors.top: image.bottom
            width: image.width
            height: image.height;
            anchors.left: image.left
            property variant source: image;
            property size sourceSize: Qt.size(0.5 / image.width, 0.5 / image.height);
            fragmentShader:
                    "varying highp vec2 qt_TexCoord0;
                    uniform lowp sampler2D source;
                    uniform lowp vec2 sourceSize;
                    uniform lowp float qt_Opacity;
                    void main() {

                        lowp vec2 tc = qt_TexCoord0 * vec2(1, -1) + vec2(0, 1);
                        lowp vec4 col = 0.25 * (texture2D(source, tc + sourceSize) + texture2D(source, tc- sourceSize)
                        + texture2D(source, tc + sourceSize * vec2(1, -1))
                        + texture2D(source, tc + sourceSize * vec2(-1, 1)));
                        gl_FragColor = col * qt_Opacity * (1.0 - qt_TexCoord0.y) * 0.2;
                    }"
        }

        transform: Rotation{
            origin.x:image.width/2.0
            origin.y:image.height/2.0
            axis{x:0;y:1;z:0}
            angle: delegateItem.PathView.iconAngle
        }
    }
    path:coverFlowPath
    pathItemCount: coverflow.itemCount
    anchors.fill: parent

    preferredHighlightBegin: 0.5
    preferredHighlightEnd: 0.5

}

Path{
    id:coverFlowPath
    startX: 0
    startY: coverflow.height/3

    PathAttribute{name:"iconZ";value: 0}
    PathAttribute{name:"iconAngle";value: 70}
    PathAttribute{name:"iconScale";value: 0.6}
    PathLine{x:coverflow.width/2;y:coverflow.height/3}

    PathAttribute{name:"iconZ";value: 100}
    PathAttribute{name:"iconAngle";value: 0}
    PathAttribute{name:"iconScale";value: 1.0}

    PathLine{x:coverflow.width;y:coverflow.height/3}
    PathAttribute{name:"iconZ";value: 0}
    PathAttribute{name:"iconAngle";value: -70}
    PathAttribute{name:"iconScale";value: 0.6}
    PathPercent{value:1.0}

}

}

---

main.qml

>代码如下：

```c
import QtQuick 2.8
import QtQuick.Window 2.2

Window {
    visible: true
    width:1800
    height: 880
    title: qsTr("灵眸")

    ListModel{
        id:model
        ListElement{url:"qrc:/image/1.png"}
        ListElement{url:"qrc:/image/2.png"}
        ListElement{url:"qrc:/image/3.png"}
        ListElement{url:"qrc:/image/4.png"}
        ListElement{url:"qrc:/image/6.png"}
        ListElement{url:"qrc:/image/7.png"}
        ListElement{url:"qrc:/image/8.png"}
        ListElement{url:"qrc:/image/9.png"}
        ListElement{url:"qrc:/image/10.png"}
        ListElement{url:"qrc:/image/11.png"}
        ListElement{url:"qrc:/image/12.png"}
        ListElement{url:"qrc:/image/13.png"}
        ListElement{url:"qrc:/image/14.png"}

    }

    CoverFlow{
        anchors.fill:parent
        model:model
    }

}

3. .cpp部分

main.cpp

代码如下：

#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
if (engine.rootObjects().isEmpty())
    return -1;

return app.exec();

}

---

# 总结
用户也可**直接关注微信公众号：云曦智划，回复“3D画廊”，即可免费获取**。同时，所有相关的Qt界面优化的部分，均在下方专栏——**Qt功能优化**中，大家如果感兴趣可以进行观看并使用，希望通过这些文章能够使大家的Qt软件更加美观和完美 ！！！

另，如果大家有时间的话，也可以在个人主页中的专栏部分，查看我的**Qt实战专栏**与**Qt界面优化**专栏哦，里面分别存放有Qt相关的实战软件和相对实用的附属功能，大家感兴趣可以看看(๑>؂<๑）
希望能帮助到大家，感谢大家支持～(￣▽￣～)~