添加数据
ui->listWidget->addItem("A");
QStringList list;
list << "B" << "C" << "D";
ui->listWidget->addItems(list);
设置item点击
void Widget::on_listWidget_itemClicked(QListWidgetItem *item)
{
//获取item中的内容
qDebug() << item->text() << endl;
//获取选中的item在qlistwidget中的位置
qDebug() << ui->listWidget->currentRow() << endl;
}
//添加数据
//创建一级item
QStringList list;
list << "测试";
QTreeWidgetItem *item = new QTreeWidgetItem(list,0);
//创建二级item
QStringList list2;
list2 << "翠花" << "女" << "22";
QTreeWidgetItem *sonItem = new QTreeWidgetItem(list2,0);
//将二级item添加到一级item中
item->addChild(sonItem);
//将一级item添加到控件中
ui->treeWidget->addTopLevelItem(item);
//item点击事件
void Widget::on_treeWidget_itemClicked(QTreeWidgetItem *item, int
column)
{
qDebug() << item->text(column) << endl;
}
for(int i = 0; i < 10; i++)
{
QString name = "张三";
//QString::number(i)数字转字符串
name.append(QString::number(i));
//新建行
int row = ui->tableWidget->rowCount();
//插入行
ui->tableWidget->insertRow(row);
//创建item
QTableWidgetItem *itemName = new QTableWidgetItem(name);
//给row行的第0个位置设置为itemName
ui->tableWidget->setItem(row,0,itemName);
QTableWidgetItem *itemSex = new QTableWidgetItem("男");
ui->tableWidget->setItem(row,1,itemSex);
QTableWidgetItem *itemAge = new QTableWidgetItem("18");
ui->tableWidget->setItem(row,2,itemAge);
QTableWidgetItem *itemAddress = new QTableWidgetItem("北方");
ui->tableWidget->setItem(row,3,itemAddress);
}
点击事件
void Widget::on_tableWidget_cellClicked(int row, int column)
{
qDebug() << "row:" << row << endl;
qDebug() << "column:" << column << endl;
qDebug() << "text:" << ui->tableWidget->item(row,column)->text() <<
endl;
}
void Widget::on_btn01_clicked()
{
ui->stackedWidget->setCurrentIndex(0);
}
void Widget::on_btn02_clicked()
{
ui->stackedWidget->setCurrentIndex(1);
}
void Widget::on_btn03_clicked()
{
ui->stackedWidget->setCurrentIndex(2);
}
#ifndef FORM_H
#define FORM_H
#include <QWidget>
#include <QSpinBox>
#include <QHBoxLayout>
#include <QString>
namespace Ui {
class Form;
}
class Form : public QWidget
{
Q_OBJECT
public:
explicit Form(QWidget *parent = 0);
~Form();
void setValue(int num);
int getValue();
private:
Ui::Form *ui;
};
#endif // FORM_H
#include "form.h"
#include "ui_form.h"
Form::Form(QWidget *parent) :
QWidget(parent),
ui(new Ui::Form)
{
ui->setupUi(this);
connect(ui->spinBox,SIGNAL(valueChanged(int)),
ui->horizontalSlider,SLOT(setValue(int)));
connect(ui->horizontalSlider,SIGNAL(valueChanged(int)),
ui->spinBox,SLOT(setValue(int)));
}
Form::~Form()
{
delete ui;
}
void Form::setValue(int num)
{
if(num < 0 || num > 99)
{
throw 0;
}
ui->spinBox->setValue(num);
}
int Form::getValue()
{
return ui->spinBox->value();
}
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private slots:
void on_pushButton_clicked();
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_pushButton_clicked()
{
ui->widget->setValue(50);
}
概述
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QMouseEvent>
#include <QDebug>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
virtual void mouseMoveEvent(QMouseEvent *event);
virtual void mousePressEvent(QMouseEvent *event);
virtual void mouseReleaseEvent(QMouseEvent *event);
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::mouseMoveEvent(QMouseEvent *event)
{
qDebug() << "鼠标移动:\tx=" << event->x() << "\ty=" << event->y() <<
endl;
}
void Widget::mousePressEvent(QMouseEvent *event)
{
qDebug() << "鼠标按下" << endl;
}
void Widget::mouseReleaseEvent(QMouseEvent *event)
{
qDebug() << "鼠标抬起" << endl;
}
bool MyLabel::eventFilter(QObject *watched, QEvent *event)
{
//判断哪个控件触发了
if(watched == this)//当前控件
{
//判断具体事件
if(event->type() == QEvent::MouseButtonPress)
{
QMouseEvent *ev = (QMouseEvent *)event;
qDebug()<<事件过滤器中 鼠标按下了x=<<ev->x()<<, y=<<ev->y()
<<endl;
return true;
}
}
return QLabel::eventFilter(watched, event);
}
概述
//头文件
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QTimer>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private slots:
void on_btn_start_clicked();
void on_btn_stop_clicked();
private:
Ui::Widget *ui;
QTimer *timer;
public slots:
void setTime();
};
#endif // WIDGET_H
//源文件
#include "widget.h"
#include "ui_widget.h"
#include <QString>
#include <QDebug>
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
timer = new QTimer(this);
connect(timer,&QTimer::timeout,this,&Widget::setTime);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_btn_start_clicked()
{
timer->start(1000);
}
void Widget::on_btn_stop_clicked()
{
timer->stop();
}
void Widget::setTime()
{
static int time = 10;
time--;
ui->text_num->setText(QString::number(time));
}
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