Qt制作定时关机小程序_qt 定时关机

作者：你好赵伟 | 2024-04-17 16:22:20

踩

qt 定时关机

文章目录

完成效果图
ui界面
- ui样图
main函数
窗口文件
- 头文件
- cpp文件

引言

一般定时关机采用命令行模式，还需要我们计算在多久后关机，我们可以做一个小程序来定时关机

在这里插入图片描述

完成效果图

在这里插入图片描述

ui界面

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>330</width>
    <height>240</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>330</width>
    <height>240</height>
   </size>
  </property>
  <property name="maximumSize">
   <size>
    <width>330</width>
    <height>240</height>
   </size>
  </property>
  <property name="font">
   <font>
    <pointsize>10</pointsize>
   </font>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QGridLayout" name="gridLayout_2">
    <item row="3" column="1">
     <widget class="QWidget" name="widget" native="true">
      <layout class="QGridLayout" name="gridLayout">
       <item row="2" column="0">
        <layout class="QHBoxLayout" name="horizontalLayout_2">
         <item>
          <widget class="QPushButton" name="shutdownButton">
           <property name="text">
            <string>关机</string>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QPushButton" name="cancelShutdownButton">
           <property name="text">
            <string>取消</string>
           </property>
          </widget>
         </item>
        </layout>
       </item>
       <item row="0" column="0">
        <layout class="QHBoxLayout" name="horizontalLayout">
         <item>
          <widget class="QComboBox" name="hourComboBox">
           <property name="minimumSize">
            <size>
             <width>62</width>
             <height>22</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>62</width>
             <height>22</height>
            </size>
           </property>
           <property name="editable">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLabel" name="hourLabel">
           <property name="minimumSize">
            <size>
             <width>0</width>
             <height>0</height>
            </size>
           </property>
           <property name="text">
            <string>时</string>
           </property>
          </widget>
         </item>
         <item>
          <spacer name="horizontalSpacer_3">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
            </size>
           </property>
          </spacer>
         </item>
         <item>
          <widget class="QComboBox" name="minuteComboBox">
           <property name="minimumSize">
            <size>
             <width>62</width>
             <height>22</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>62</width>
             <height>22</height>
            </size>
           </property>
           <property name="editable">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLabel" name="minuteLabel">
           <property name="text">
            <string>分</string>
           </property>
          </widget>
         </item>
        </layout>
       </item>
       <item row="1" column="0">
        <spacer name="verticalSpacer_4">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>20</width>
           <height>30</height>
          </size>
         </property>
        </spacer>
       </item>
      </layout>
     </widget>
    </item>
    <item row="3" column="0">
     <spacer name="horizontalSpacer">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="0" column="1">
     <spacer name="verticalSpacer_2">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>40</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="4" column="1">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>40</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="3" column="2">
     <spacer name="horizontalSpacer_2">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>40</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="1" column="1">
     <widget class="QLabel" name="label">
      <property name="minimumSize">
       <size>
        <width>186</width>
        <height>30</height>
       </size>
      </property>
      <property name="maximumSize">
       <size>
        <width>186</width>
        <height>30</height>
       </size>
      </property>
      <property name="text">
       <string>                   设置关机时间</string>
      </property>
     </widget>
    </item>
    <item row="2" column="1">
     <spacer name="verticalSpacer_3">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>30</height>
       </size>
      </property>
     </spacer>
    </item>
   </layout>
  </widget>
 </widget>
 <resources/>
 <connections/>
</ui>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234

ui样图

在这里插入图片描述

main函数

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

1
2
3
4
5
6
7
8
9
10
11
12

窗口文件

核心逻辑
采用信号和槽，完成事件链接

 QProcess::startDetached("shutdown", QStringList() << "/s" << "/t" << QString::number(timeSeconds));
1

 QProcess::execute("shutdown", QStringList() << "/a");
1

头文件

// mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QTimer>
#include <QDateTime>
#include <QProcess>
#include <QMessageBox>
#include <QString>
#include <QDebug>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private slots:
    void onShutdownButtonClicked();
    void onCancelShutdownButtonClicked();

private:
    Ui::MainWindow *ui;
    QTimer *shutdownTimer;

};

#endif // MAINWINDOW_H

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

cpp文件

// mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 获取当前时间
    QTime currentTime = QTime::currentTime();


    // 设置小时下拉框
    ui->hourComboBox->setEditable(false);
    for (int i = 0; i < 24; ++i) {
        // 比较当前时间与选项时间
    if (currentTime.hour() <= i) {
            ui->hourComboBox->addItem(QString::number(i));
        }
    }
        // 选择当前小时作为已选中项
    ui->hourComboBox->setCurrentIndex(ui->hourComboBox->findText(QString::number(currentTime.hour())));

        // 设置分钟下拉框
    ui->minuteComboBox->setEditable(false);
    for (int i = 0; i < 60; ++i) {
        // 比较当前时间与选项时间
    if (currentTime.minute() <= i) {
            ui->minuteComboBox->addItem(QString::number(i));
        }
    }
        // 选择当前分钟作为已选中项
    ui->minuteComboBox->setCurrentIndex(ui->minuteComboBox->findText(QString::number(currentTime.minute())));

    // 连接按钮点击事件到槽函数
    connect(ui->shutdownButton, &QPushButton::clicked, this, &MainWindow::onShutdownButtonClicked);
    connect(ui->cancelShutdownButton, &QPushButton::clicked, this, &MainWindow::onCancelShutdownButtonClicked);
}

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

void MainWindow::onShutdownButtonClicked()
{
    // 获取用户选择的小时和分钟
    int selectedHour = ui->hourComboBox->currentText().toInt();
    int selectedMinute = ui->minuteComboBox->currentText().toInt();

    // 获取当前时间
    QDateTime currentTime = QDateTime::currentDateTime();

    // 获取用户选择的时间
    QDateTime shutdownTime = QDateTime(currentTime.date(), QTime(selectedHour, selectedMinute));

    // 计算时间差
    qint64 timeDifference = currentTime.msecsTo(shutdownTime);

    int timeSeconds=int(timeDifference/1000);
    // 设置定时器的超时时间
    //shutdownTimer->start(timeDifference);

    QProcess::startDetached("shutdown", QStringList() << "/s" << "/t" << QString::number(timeSeconds));
    // 提示用户关机已设置
    QMessageBox::information(this, "关机设置", "关机已设置，将在选择的时间执行！");
}

void MainWindow::onCancelShutdownButtonClicked()
{
    // 取消关机
    QProcess::execute("shutdown", QStringList() << "/a");
    QMessageBox::information(this, "取消关机", "已取消关机操作！");
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78

声明：本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有侵权的内容，请联系我们。转载请注明出处：【wpsshop博客】