QT软件主题切换

1、在配置文件里增加两个qss文件

 

 第一个是深蓝色主题，第二个是亮色主题

ps：设置背景图

QWidget#centralWidget{
    border: 0px solid #7D7D7D;
    background: rgba(0,0,0,0);
    background-image:url(:/main/back.png)
}

 

 

2、新建主题选择类

ps：

主要是一个界面类，初始化时将当前文件里里所有的主题列在表格里，供用户选择；

需要传入当前主程序的this指针，通过this->setStyleSheet来设置qss；

在每次设置主题之后需要把当前主题存到配置文件，下次启动程序自动设置为上次已设置的主题。

 

 

Ztheme.h

 

#ifndef ZTHEME_H
#define ZTHEME_H

#include <QDialog>

namespace Ui {
class Ztheme;
}

namespace ZTHEME_NAMESPACE {
const QString DEFAULE_THEME_NAME = "main_dark_blue.qss";
const QString THEMES_DIR = "./themes/";
}

class Ztheme : public QDialog
{
    Q_OBJECT

public:
    explicit Ztheme(QWidget *parent = 0);
    ~Ztheme();
    /*传入需要设置的程序的指针*/
    inline void setMainUi(QWidget* p){this->pParent = p;}
    /*设置上次的风格*/
    void setLastTheme();
public:
    static QWidget* pParent;
private slots:
    void on_pushButton_submit_clicked();
    void on_pushButton_cancel_clicked();

private:
    Ui::Ztheme *ui;
    void initThemes(void);
};

#endif // ZTHEME_H

Ztheme.cpp

#include "ztheme.h"
#include "ui_ztheme.h"
#include <QDir>
#include <QFile>
#include <QDebug>
#include "config.h"

using namespace ZTHEME_NAMESPACE;
using namespace ZConfigNamespace;

QWidget* Ztheme::pParent = nullptr;

Ztheme::Ztheme(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Ztheme)
{
    ui->setupUi(this);
    (void)initThemes();
}

Ztheme::~Ztheme()
{
    delete ui;
}

void Ztheme::setLastTheme()
{
    QByteArray themeBa;
    QString themePath = QDir::currentPath() + "/themes/" + Config::getInstance()->getCfgItemByKey(CUR_THEME).toString();
    QFile file(themePath);
    file.open(QFile::ReadOnly);
    if(file.isOpen()){
        themeBa = file.readAll();
        file.close();
    }
    if(pParent){
        this->pParent->setStyleSheet(themeBa);
    }
}

void Ztheme::initThemes()
{
    ui->tableWidget_theme->clearContents();
    ui->tableWidget_theme->setRowCount(0);
    QDir dir(THEMES_DIR);
    QFileInfoList file_list = dir.entryInfoList(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
    for(int i=0; i<file_list.size(); i++)
    {
        ui->tableWidget_theme->insertRow(ui->tableWidget_theme->rowCount());
        ui->tableWidget_theme->setItem(ui->tableWidget_theme->rowCount()-1, 0, new QTableWidgetItem(QString::number(ui->tableWidget_theme->rowCount())));
        ui->tableWidget_theme->setItem(ui->tableWidget_theme->rowCount()-1, 1, new QTableWidgetItem(file_list.at(i).baseName()));
        for(int col=0; col<2; col++){
            ui->tableWidget_theme->item(ui->tableWidget_theme->rowCount()-1, col)->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
        }
    }
}

void Ztheme::on_pushButton_submit_clicked()
{
    QByteArray themeBa;
    QString qssFileName = ui->tableWidget_theme->item(ui->tableWidget_theme->currentRow(), 1)->text();
    QString themePath = THEMES_DIR + qssFileName + ".qss";
    QFile file(themePath);
    file.open(QFile::ReadOnly);
    if(file.isOpen()){
        themeBa = file.readAll();
    }
    if(pParent){
        this->pParent->setStyleSheet(themeBa);
        Config::getInstance()->setValue(qssFileName + ".qss" ,CUR_THEME);
    }

    this->done(1);
}

void Ztheme::on_pushButton_cancel_clicked()
{
    this->done(0);
}

Ztheme.ui

 

 

综上：核心就是设置qss文件