2、Qt Project之鼠标事件监控

时间:2023-03-10 00:45:12
2、Qt Project之鼠标事件监控

鼠标事件监控:

对于鼠标时间监控的相关操作,我们在简历工程的时候需要选择的是QWidget基类,不选择QMainWindow基类,如下所示:

2、Qt Project之鼠标事件监控Base class:QWidget

Step1:我们首先定义的是整个Qt软件界面的UI设计:

根据设计的情况,Qt Creator自动帮我们生成了如下的HTML脚本:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>Widget</class>
<widget class="QWidget" name="Widget">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>400</width>
<height>300</height>
</rect>
</property>
<property name="windowTitle">
<string>Widget</string>
</property>
<widget class="QPushButton" name="pushButton">
<property name="geometry">
<rect>
<x>190</x>
<y>230</y>
<width>101</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>PushButton</string>
</property>
</widget>
<widget class="QLabel" name="label">
<property name="geometry">
<rect>
<x>-10</x>
<y>200</y>
<width>171</width>
<height>17</height>
</rect>
</property>
<property name="font">
<font>
<italic>true</italic>
<strikeout>false</strikeout>
</font>
</property>
<property name="text">
<string> PressMove-axisEvent</string>
</property>
</widget>
<widget class="QLabel" name="label_2">
<property name="geometry">
<rect>
<x>0</x>
<y>256</y>
<width>171</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<italic>true</italic>
<strikeout>false</strikeout>
</font>
</property>
<property name="text">
<string> ReleaseMouse-axisEvent</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_2">
<property name="geometry">
<rect>
<x>190</x>
<y>200</y>
<width>98</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>PushButton</string>
</property>
</widget>
<widget class="QPushButton" name="pushButton_3">
<property name="geometry">
<rect>
<x>190</x>
<y>260</y>
<width>98</width>
<height>27</height>
</rect>
</property>
<property name="text">
<string>PushButton</string>
</property>
</widget>
<widget class="QLabel" name="label_3">
<property name="geometry">
<rect>
<x>0</x>
<y>226</y>
<width>171</width>
<height>31</height>
</rect>
</property>
<property name="font">
<font>
<italic>true</italic>
<strikeout>false</strikeout>
</font>
</property>
<property name="text">
<string> PressMouse-axisEvent</string>
</property>
</widget>
<widget class="QLabel" name="label_4">
<property name="geometry">
<rect>
<x>0</x>
<y>60</y>
<width>211</width>
<height>51</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>22</pointsize>
<italic>true</italic>
<underline>false</underline>
<strikeout>false</strikeout>
</font>
</property>
<property name="cursor">
<cursorShape>BlankCursor</cursorShape>
</property>
<property name="text">
<string>Mouse Monitor</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
<widget class="QLabel" name="label_5">
<property name="geometry">
<rect>
<x>20</x>
<y>120</y>
<width>171</width>
<height>21</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>10</pointsize>
<italic>true</italic>
<underline>false</underline>
<strikeout>false</strikeout>
</font>
</property>
<property name="cursor">
<cursorShape>BlankCursor</cursorShape>
</property>
<property name="text">
<string>Designed by : mm1994uestc</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
<widget class="QLabel" name="label_6">
<property name="geometry">
<rect>
<x>0</x>
<y>10</y>
<width>321</width>
<height>51</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>28</pointsize>
<italic>true</italic>
<underline>false</underline>
<strikeout>false</strikeout>
</font>
</property>
<property name="cursor">
<cursorShape>BlankCursor</cursorShape>
</property>
<property name="text">
<string>Qt interface Demo!</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</widget>
<layoutdefault spacing="6" margin="11"/>
<resources/>
<connections/>
</ui>

实际的界面的效果如下所示:

2、Qt Project之鼠标事件监控

Step2:我们根据设计的实际情况对每一个界面上的Button进行相关的触发机制:

a我们需要包含Mouse鼠标相关的头文件进来

#include <QMouseEvent>

b)鼠标事件的相关函数都封装在Widget基类当中,针对上面的三类事件Event,我们将列举如下:

void Widget::mousePressEvent(QMouseEvent *e)
void Widget::mouseMoveEvent(QMouseEvent *e)
void Widget::mouseReleaseEvent(QMouseEvent *e)

c)这里我们需要在widget.cpp文件中对每一个事件函数进行实现:(具体实现如下所示)

void Widget::mousePressEvent(QMouseEvent *e)
{
qDebug() << " X , Y"; // 输出X Y字符串
qDebug() << tr("%1,%2").arg(e->x()).arg(e->y()); // e是我们取得的鼠标对象,我们在对象中取得鼠标对象的相关参数,如x坐标和y坐标
ui->pushButton->setText(tr("(%1,%2)").arg(e->x()).arg(e->y())); // 我们将取得的xy的坐标更新到我们的Button的内容当中
}
void Widget::mouseMoveEvent(QMouseEvent *e)
{
ui->pushButton_2->setText(tr("%1,%2").arg(e->x()).arg(e->y())); // 与上同理
}
void Widget::mouseReleaseEvent(QMouseEvent *e)
{
ui->pushButton_3->setText(tr("%1,%2").arg(e->x()).arg(e->y())); // 与上同理
}

d)我们需要在头文件widget.h文件当中声明我们实现的鼠标的相关函数:

protected:
void mousePressEvent(QMouseEvent *); void mouseMoveEvent(QMouseEvent *); void mouseReleaseEvent(QMouseEvent *);

以上就基本完成了整个程序的所有功能,详细的工程代码请参考我博客园文件中的内容(文件名称MouseMonitor.tar.gz):https://i.cnblogs.com/Files.aspx