Qt之QPushButton

    在Qt工具箱中有按钮组（Buttons），按钮组包含Push Buttton（按钮），Tool Button（工具按钮），Radio Button（单选按钮），Check Box（复选框），Command Link  Button（命令链接按钮），Dialog Button Box（对话框按钮盒）。
    ![在这里插入图片描述](https://img-blog.csdnimg.cn/direct/6f0363a7f92842859b24a76a942aa002.png)
   Push Buttton主要用于响应用户的点击操作，用于Push Button使用场景较多，本文主要演示关于Push Button的相关内容。主要包括以下几项：
   （1）背景颜色变化。使用PushButton充当圆形灯，可点击改变颜色。应用场景如：红绿灯，设备灯等；
   （2）文本颜色变化。使用PushButton充当警告指示，可点击改变颜色。应用场景如:告警，警告，提示等；
   （3）按钮状体变化。按钮正常、悬停、按压三种状态的颜色变化。制作测试按钮，展示按钮响应效果。
   （4）颜色选择按钮。点击按钮弹出颜色对话框，改变按钮背景色；
   （5）下拉菜单按钮。点击按钮弹出下拉菜单，选择菜单项；
   （6）退出按钮。点击退出按钮，程序退出。

1.功能实现

(1)创建PushButtonDlg窗口，增加圆灯按钮、字体按钮、彩色按钮、选择颜色按钮、弹出下拉菜单和退出等资源。

![在这里插入图片描述](https://img-blog.csdnimg.cn/direct/7219351a963a4e3ea9a33781bbec7b36.png
(2)PushButtonDlg .h内容

#ifndef PUSHBUTTONDLG_H
#define PUSHBUTTONDLG_H

#include <QWidget>
#include <QMenu>

namespace Ui {
class PushButtonDlg;
}

class PushButtonDlg : public QWidget
{
    Q_OBJECT

public:
    explicit PushButtonDlg(QWidget *parent = 0);
    ~PushButtonDlg();

private slots:
    void on_pushButton_choose_clicked();

    void on_pushButton_RedLamp_clicked();

    void on_pushButton_GreenLamp_clicked();

    void on_pushButton_YellowLamp_clicked();

    void on_pushButton_RedFont_clicked();

    void on_pushButton_GreenFont_clicked();

    void on_pushButton_YellowFont_clicked();

    void on_pushButton_BlueFont_clicked();

    void on_pushButton_BlueLamp_clicked();

    void on_pushButton_Menu_clicked();

    void on_pushButton_Quit_clicked();

private:
    Ui::PushButtonDlg *ui;
};

#endif // PUSHBUTTONDLG_H

1.1背景颜色变化

以蓝色圆灯、红色圆灯、绿色圆灯、黄色圆灯演示背景颜色变化。
![在这里插入图片描述](https://img-blog.csdnimg.cn/direct/ffe5aea0a1244b2b9b5f677a009530cd.png

void PushButtonDlg::on_pushButton_BlueLamp_clicked()
{
    if(ui->pushButton_BlueLamp->GetBackgroundColor() == QColor(0,0,0))
        ui->pushButton_BlueLamp->SetPushButtonQss(30,5,14,"#0000FF","#FFFFFF","#0000FF","#FFFFFF","#0000FF","#FFFFFF");
    else
        ui->pushButton_BlueLamp->SetPushButtonQss(30,5,14,"#000000","#FFFFFF","#000000","#FFFFFF","#000000","#FFFFFF");
}

void PushButtonDlg::on_pushButton_RedLamp_clicked()
{
    if(ui->pushButton_RedLamp->GetBackgroundColor() == QColor(0,0,0))
        ui->pushButton_RedLamp->SetPushButtonQss(30,5,14,"#ff0000","#FFFFFF","#ff0000","#FFFFFF","#ff0000","#FFFFFF");
    else
        ui->pushButton_RedLamp->SetPushButtonQss(30,5,14,"#000000","#FFFFFF","#000000","#FFFFFF","#000000","#FFFFFF");
}

void PushButtonDlg::on_pushButton_GreenLamp_clicked()
{
    if(ui->pushButton_GreenLamp->GetBackgroundColor() == QColor(0,0,0))
        ui->pushButton_GreenLamp->SetPushButtonQss(30,5,14,"#00FF00","#FFFFFF","#00FF00","#FFFFFF","#00FF00","#FFFFFF");
    else
        ui->pushButton_GreenLamp->SetPushButtonQss(30,5,14,"#000000","#FFFFFF","#000000","#FFFFFF","#000000","#FFFFFF");
}

void PushButtonDlg::on_pushButton_YellowLamp_clicked()
{
    if(ui->pushButton_YellowLamp->GetBackgroundColor() == QColor(0,0,0))
        ui->pushButton_YellowLamp->SetPushButtonQss(30,5,14,"#FFFF00","#FFFFFF","#FFFF00","#FFFFFF","#FFFF00","#FFFFFF");
    else
        ui->pushButton_YellowLamp->SetPushButtonQss(30,5,14,"#000000","#FFFFFF","#000000","#FFFFFF","#000000","#FFFFFF");
}