This article introduces the various operations of the QProgressBar control in detail, such as: creating a new interface , setting the maximum and minimum values , setting the progress , returning the minimum progress value , returning the maximum progress value , returning the current progress value , resetting the default progress value, and returning the progress bar text , set progress bar text , set display progress bar, set vertical and horizontal, style sheet, signal slot, source code, other articles and other operations.
QProgressBar (progress bar) is a widget in the Qt framework that is used to visually display the progress of a task or operation. It is usually used in the following situations: 1. Display the progress of the task: The progress bar can display the completion of the task and let the user understand the progress of the task. For example, when a file is being downloaded or copied, a progress bar can be used to display the download or copy progress of the file. 2. Feedback on long-running operations: When performing an operation that takes some time, a progress bar can provide feedback to let the user know that the operation is in progress and show the progress of the operation. This increases the user experience and prevents users from thinking that the application has crashed or become unresponsive. 3. Control the process: The progress bar can also be used as a way to control the process. For example, in a game, a progress bar can be used to represent a character's health or energy bar so that players can understand the character's status. By setting the minimum value, maximum value and current value of the progress bar, you can control the display range and progress of the progress bar. Progress bars can be displayed in a horizontal or vertical orientation, depending on the needs of the application. In summary, QProgressBar is a widget used to visually display the progress of a task or operation, and can provide feedback and control processes to enhance the user experience. .
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QT QProgressBar control usage detailed directory
2 Set the maximum and minimum values
4 Return to the minimum progress value
5 Return to the maximum progress value
6 Return the current progress value
10 Set the display progress bar
11 Set vertical and horizontal
1 Create a new interface
2 Set the maximum and minimum values
// 设置进度范围的最小值和最大值
ui->progressBar->setRange(20,40);3 Set the progress
//设置当前进度的值
ui->progressBar->setValue(50);4 Return to the minimum progress value
//返回进度范围的最小值
miValue = ui->progressBar->minimum();5 Return to the maximum progress value
//返回进度范围的最大值
miValue = ui->progressBar->maximum();6 Return the current progress value
//返回当前进度的值
miValue = ui->progressBar->value();7 Reset progress defaults
//重置进度条的值为默认值
ui->progressBar->reset();
8 Return to progress bar text
//返回进度条的文本
ui->progressBar->text();9 Set progress bar text
//设置进度条的文本格式
ui->progressBar->setFormat("CSDN 双子座断点");10 Set the display progress bar
//设置是否显示进度条的文本
ui->progressBar->setTextVisible(true);11 Set vertical and horizontal
//设置垂直水平
ui->progressBar->setOrientation(Qt::Horizontal);//水平 ///Qt::Vertical 垂直12 style sheets
// 设置样式表
ui->progressBar->setStyleSheet("QProgressBar {"
" border: 1px solid gray;"
" border-radius: 5px;"
" background-color: white;"
"}"
"QProgressBar::chunk {"
" background-color: #2196F3;"
" width: 20px;"
"}");
ui->progressBar->setRange(0, 100);
ui->progressBar->setValue(50);13 signal slot
// 连接信号和槽函数
connect(ui->progressBar, &QProgressBar::valueChanged, this, &MainWindow::onProgressChanged);
void MainWindow::onProgressChanged(int value) {
qDebug() << "进度值变为:" << value;
}14 source code
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QDebug>
//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 onProgressChanged(int value);
private:
Ui::MainWindow *ui;
QString Title;
QString Version;
QString BlogText;
};
#endif // MAINWINDOW_H
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