目錄

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關鍵

演示及源碼

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關鍵

插件端：

Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QStyleFactoryInterface" FILE "mystyle.json")

在QStylePlugin中這個是必須的：org.qt-project.Qt.QStyleFactoryInterface"

json文件中的數據，最好與

QStyle *MyStylePlugin::create(const QString &key) {if (key.toLower() == "mystyleyellow")return new MyStyle;return 0; }

這個一樣！

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插件讀取端：

QStylePlugin中可以使用QStyleFactory調用插件！

QStyleFactory::keys();可以獲取key值，QStyleFactory::create()這個可以創建！

注意要放到這個文件中：

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styles文件如下：

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演示及源碼

程序運行截圖如下：

插件端：

mystyle.h

#ifndef SIMPLESTYLE_H #define SIMPLESTYLE_H#include <QProxyStyle>QT_BEGIN_NAMESPACE class QPalette; QT_END_NAMESPACEclass MyStyle : public QProxyStyle {Q_OBJECTpublic:MyStyle() {}void polish(QPalette &palette) override; };#endif

mystyleplugin.h

#ifndef SIMPLESTYLEPLUGIN_H #define SIMPLESTYLEPLUGIN_H#include <QStylePlugin>QT_BEGIN_NAMESPACE class QStringList; class QStyle; QT_END_NAMESPACEclass MyStylePlugin : public QStylePlugin {Q_OBJECTQ_PLUGIN_METADATA(IID "org.qt-project.Qt.QStyleFactoryInterface" FILE "mystyle.json")public:MyStylePlugin() {}QStringList keys() const;QStyle *create(const QString &key) override; };#endif

mystyle.cpp

#include "mystyle.h" #include "mystyleplugin.h" #include <QtWidgets>void MyStyle::polish(QPalette &palette) {palette.setBrush(QPalette::Window, Qt::yellow); }

mystyleplugin.cpp

#include "mystyleplugin.h" #include "mystyle.h" #include <QtWidgets>QStringList MyStylePlugin::keys() const {return QStringList() << "MyStyleYellow"; }QStyle *MyStylePlugin::create(const QString &key) {if (key.toLower() == "mystyleyellow")return new MyStyle;return 0; }

StylePluginDemo.pro

TEMPLATE = lib CONFIG += plugin QT += widgetsTARGET = StylePluginYellowSOURCES += \mystyle.cpp \mystyleplugin.cppHEADERS += \mystyle.h \mystyleplugin.hEXAMPLE_FILES += mystyle.jsonwin32 {CONFIG(debug, release|debug):DESTDIR = debug/styles/CONFIG(release, release|debug):DESTDIR = release/styles/ } else {DESTDIR = ../styles/ }EXAMPLE_FILES += simplestyle.json

json文件如下：

{"Keys": ["mystyleyellow"] }

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插件讀取端：

widget.h

#ifndef WIDGET_H #define WIDGET_H#include <QWidget>namespace Ui { class Widget; }class Widget : public QWidget {Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();protected slots:void btnClicked();private:Ui::Widget *ui; };#endif // WIDGET_H

main.cpp

#include "widget.h" #include <QApplication>int main(int argc, char *argv[]) {QApplication a(argc, argv);Widget w;w.show();return a.exec(); }

widget.cpp

#include "widget.h" #include "ui_widget.h"#include <QDebug> #include <QStyleFactory> #include <QStyle> #include <QVBoxLayout> #include <QPushButton>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this);this->setWindowTitle("CSDN IT1995");QStringList list = QStyleFactory::keys();qDebug() << list;QVBoxLayout *layout = new QVBoxLayout;for(int i = 0; i < list.size(); i++){if(list[i].contains("mystyle")){QPushButton *btn = new QPushButton(list[i]);layout->addWidget(btn);connect(btn, SIGNAL(clicked(bool)), this, SLOT(btnClicked()));}}setLayout(layout); }Widget::~Widget() {delete ui; }void Widget::btnClicked() {QString text = static_cast<QPushButton*>(sender())->text();QStyle *style = QStyleFactory::create(text);QApplication::setStyle(style); }

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