最近在修改一个软件的过程中，把Qt控件进行了重写，重写之后，布局更加简单、合理，如此使得出现bug的概率降低。
实现的功能
1、将零散的小控件打包成一个模块，进行整模块的添加。
2、实现每个模块的单独删除。
3、实现数值、功能的交互功能。如按钮等。
代码内容
话不多说，直接上代码。因为是顺手写的，注释不多，自己领会吧，工程文件放在文末。
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <testform.h>
#include <QDebug>
#include <QMessageBox>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();
QGridLayout *m_gLayout;
QList<testForm *>mtestForms;
int count;
void delete_Layout();
private slots:
void on_add_btn_clicked();
void mdel_btn_clicked();
private:
Ui::MainWindow *ui;
signals:
void add_info(int num);
};
#endif // MAINWINDOW_H
mainwindow.cpp
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3
4 MainWindow::MainWindow(QWidget *parent) :
5 QMainWindow(parent),
6 ui(new Ui::MainWindow)
7 {
8 ui->setupUi(this);
9 m_gLayout=new QGridLayout;
10 ui->widget->setLayout(m_gLayout);
11 count=0;
12 }
13
14 MainWindow::~MainWindow()
15 {
16 delete ui;
17 }
18
19 void MainWindow::on_add_btn_clicked()
20 {
21 if(ui->lineEdit->text()!=""){
22 count=mtestForms.size();
23 testForm *mtestForm=new testForm();
24 mtestForms.append(mtestForm);
25 mtestForm->setEdit(ui->lineEdit->text());
26 connect(mtestForm,SIGNAL(mdel()),this,SLOT(mdel_btn_clicked()));
27 m_gLayout->addWidget(mtestForm);
28 }else{
29 QMessageBox::information(this,"warming","请输入类别");
30 }
31 }
32
33 void MainWindow::mdel_btn_clicked()
34 {
35 testForm *tf = qobject_cast<testForm *>(sender()); //这一步能够判断你点击的是哪一个控件
36 m_gLayout->removeWidget(tf);
37 tf->deleteLater();
38 }
testfom.h
1 #ifndef TESTFORM_H
2 #define TESTFORM_H
3 #include <QWidget>
4 #include <QGroupBox>
5 #include <QHBoxLayout>
6 #include <QLabel>
7 #include <QLineEdit>
8 #include <QPushButton>
9 #include <QTimer>
10 #include <QDebug>
11 class testForm:public QWidget
12 {
13 Q_OBJECT
14 public:
15 testForm();
16 QPushButton *m_btn_start;
17 QPushButton *m_btn_delete;
18 QLabel *m_label_Name;
19 QLabel *m_label_Count;
20 QLineEdit *m_lineEidt;
21 QHBoxLayout *m_hlayoutLabel;
22 QTimer *ask_COM_Timer;
23 void setEdit(QString type);
24 int count;
25
26 private slots:
27 void del_btn_click();
28 void startTimer();
29 void printcount();
30
31 signals:
32 void mdel();
33 };
34
35 #endif // TESTFORM_H
testfom.cpp
1 #include "testform.h"
2
3 testForm::testForm()
4 {
5 m_btn_start=new QPushButton();
6 connect(m_btn_start,SIGNAL(clicked()),this,SLOT(startTimer()));
7 m_btn_start->setText("启动");
8 m_btn_delete=new QPushButton();
9 connect(m_btn_delete,SIGNAL(clicked()),this,SLOT(del_btn_click()));
10 m_btn_delete->setText("删除");
11 ask_COM_Timer=new QTimer(this);
12 ask_COM_Timer->setInterval(1000);
13 connect(ask_COM_Timer,SIGNAL(timeout()),this,SLOT(printcount()));
14 m_label_Name=new QLabel();
15 m_label_Count=new QLabel();
16 m_lineEidt=new QLineEdit();
17 m_hlayoutLabel=new QHBoxLayout;
18 m_hlayoutLabel->addWidget(m_btn_start,0,nullptr);
19 m_hlayoutLabel->addWidget(m_lineEidt,1,nullptr);
20 m_hlayoutLabel->addWidget(m_label_Name,2,nullptr);
21 m_hlayoutLabel->addWidget(m_label_Count,3,nullptr);
22 m_hlayoutLabel->addStretch(4);
23 m_hlayoutLabel->addWidget(m_btn_delete,5,nullptr);
24
25 this->setLayout(m_hlayoutLabel);
26 QSizePolicy policy = this->sizePolicy();
27 policy.setHorizontalPolicy(QSizePolicy::Preferred);
28 policy.setVerticalPolicy(QSizePolicy::Fixed);
29 this->setSizePolicy(policy);
30 }
31
32 void testForm::del_btn_click()
33 {
34 emit mdel();
35 }
36
37 void testForm::setEdit(QString type)
38 {
39 m_lineEidt->setText(type);
40 m_label_Name->setText(type);
41 }
42
43 void testForm::startTimer()
44 {
45 count=0;
46 if(m_btn_start->text()=="启动"){
47 ask_COM_Timer->start();
48 m_btn_start->setText("停止");
49 }else if(m_btn_start->text()=="停止"){
50 ask_COM_Timer->stop();
51 m_btn_start->setText("启动");
52 }
53 }
54
55 void testForm::printcount(){
56 qDebug()<<m_lineEidt->text()+" "+QString::number(count);
57 m_label_Count->setText(QString::number(count));
58 count++;
59 }