This article introduces the various operations of the QMdiArea control in detail, such as: creating a new interface , source code , adding an interface , removing a child window , setting an active child window , cascading child windows, tiled child windows, and closing the current child window. , close the current sub-window, return to the current sub-window, return to the current sub-window, return to the sub-window list , signal slot, click signal, other articles and other operations.
In actual development, an interface may contain more than a dozen controls, and manually adjusting their positions is time-consuming and laborious. QMdiArea (Multiple Document Interface Area) provides an area that can display multiple document windows at the same time.
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QT QMdiArea control usage detailed directory
6 sub-window cascade arrangement
7 sub-windows arranged in tiles
8 Close the current sub-window
10 Return to the current subwindow
11 Return to the current subwindow
1 Create a new interface
2 source code
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QDebug>
#include <QTextEdit>
#include <QMdiSubWindow>
//加入GBK申明，否则中文乱码 全局使用GBK文件操作因为有中文所以使用
#pragma execution_character_set("utf-8")
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private slots:
void subWindowAct(QMdiSubWindow* subWindow);
private:
Ui::MainWindow *ui;
QString Title;
QString Version;
QString BlogText;
QMdiSubWindow* subWindow1;
QMdiSubWindow* subWindow2;
QMdiSubWindow* subWindow3;
};
#endif // MAINWINDOW_H
3 Add interface
subWindow1 = new QMdiSubWindow;
subWindow2 = new QMdiSubWindow;
subWindow3 = new QMdiSubWindow;
subWindow1->setWidget(new QTextEdit(QString("This is window 1")));
subWindow2->setWidget(new QTextEdit(QString("This is window 2")));
subWindow3->setWidget(new QTextEdit(QString("This is window 3")));
ui->mdiArea->addSubWindow(subWindow1);
ui->mdiArea->addSubWindow(subWindow2);
ui->mdiArea->addSubWindow(subWindow3);4 Remove a child window
//从QMdiArea中移除一个子窗口，但不删除它。
ui->mdiArea->removeSubWindow(subWindow1);5 Set up active sub-window
//设置当前活动的子窗口。
ui->mdiArea->setActiveSubWindow(subWindow2);6 sub-window cascade arrangement
//将子窗口以级联的方式排列。
ui->mdiArea->cascadeSubWindows();7 sub-windows arranged in tiles
//将子窗口以平铺的方式排列。
ui->mdiArea->tileSubWindows();8 Close the current sub-window
//关闭当前活动的子窗口。
ui->mdiArea->closeActiveSubWindow();9 Close all child windows
//关闭所有的子窗口。
//ui->mdiArea->closeAllSubWindows();10 Return to the current subwindow
//返回当前活动的子窗口
ui->mdiArea->activeSubWindow(); //QMdiSubWindow*11 Return to the current subwindow
//返回当前的子窗口
ui->mdiArea->currentSubWindow();//QMdiSubWindow*12 Return to subwindow list
//返回子窗口的列表
ui->mdiArea->subWindowList(); //QList<QMdiSubWindow *>13 signal slot
QObject::connect(ui->mdiArea, &QMdiArea::subWindowActivated, this, &MainWindow::subWindowAct);
void MainWindow::subWindowAct(QMdiSubWindow* subWindow)
{
if (subWindow) {
// 获取活动的子窗口的指针subWindow，并进行相应的操作
// 例如，可以获取子窗口的标题、内容等信息
QString windowTitle = subWindow->windowTitle(); qDebug() << "子窗口标题:" << windowTitle;
QWidget *windowContent = subWindow->widget(); qDebug() << "子窗口内容:" << windowTitle;
} else {
// 当没有活动的子窗口时的处理逻辑
}
}
14 click signal
//void mousePressEvent(QMouseEvent *event) override
//{
// if (event->button() == Qt::LeftButton) {
// QMdiSubWindow *subWindow = subWindowAt(event->pos());
// if (subWindow) {
// // 处理单击窗口事件
// }
// }
// QMdiArea::mousePressEvent(event);
//}15 other articles
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