QT qpprogressbar details

1.QProgressBar sketch

QProgressBar Provides a horizontal or vertical progress bar , have access to setMinimum() and setMaximum Specify the minimum and maximum steps . The current number of steps is setValue() Set up . The progress bar can be used reset() Rewind to the beginning .

2. Common methods

void setMaximum(int maximum)	Set maximum
void setMinimum(int minimum)	Set minimum
void setRange(int minimum, int maximum)	set range , Maximum 、 minimum value
void setValue(int value)	set currency
void reset()	Reset
void setOrientation(Qt::Orientation)	Set the direction , vertical , level
void setAlignment(Qt::Alignment alignment)	Set alignment , In the middle , Left 、 Right
void setTextVisible(bool visible)	Set whether the progress bar text is displayed
void setInvertedAppearance(bool invert)	Set positive 、 back
void setFormat(const QString &format)	Set the text display format

3. Example , Compare progress bar

p1 Set as follows , Normal settings .

    ui->progressBar1->setMinimum(0);
    ui->progressBar1->setMaximum(100);
    ui->progressBar1->setValue(50);
    ui->progressBar1->setOrientation(Qt::Horizontal);

p2 Set as follows , Set the text alignment , Progress bar direction, etc .

    ui->progressBar2->setMinimum(0);
    ui->progressBar2->setMaximum(100);
    ui->progressBar2->setValue(50);
    ui->progressBar2->setOrientation(Qt::Horizontal);
    ui->progressBar2->setInvertedAppearance(true);// Set opposite direction 
    ui->progressBar2->setFormat("%v");
    ui->progressBar2->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);  //  Alignment mode 

setFormat(), There are several ways

%p%	percentage , This is the default display
%v	Current progress
%m	Total steps

You can also directly set the displayed value , As shown in the figure below , Display decimal .

 

ui->progressBar1->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);  //  Alignment mode 

ui->progressBar1->setFormat(QString("cur progress value:%1%").arg(QString::number(50.43, 'f', 2)));

p3 Set as follows , Busy progress display .

Just set the maximum value 、 The minimum value is 0 That's it .

    ui->progressBar3->setMinimum(0);
    ui->progressBar3->setMaximum(0);

4. Set up a style sheet

Here is a simple style sheet . The effect is as follows , For reference only .

 

QString s1 = "QProgressBar {\
    border: 2px solid grey;\
    border-radius: 5px;\
    text-align: center;\
    color:#ff0000;\
}";

QString s2 = "QProgressBar::chunk {\
    background-color: #05B8CC;\
    width: 20px;\
    margin: 0.5px;\
}";

call

ui->progressBar1->setStyleSheet(s1+s2);